CN203297183U - Manual pilot valve - Google Patents
Manual pilot valve Download PDFInfo
- Publication number
- CN203297183U CN203297183U CN2013202875757U CN201320287575U CN203297183U CN 203297183 U CN203297183 U CN 203297183U CN 2013202875757 U CN2013202875757 U CN 2013202875757U CN 201320287575 U CN201320287575 U CN 201320287575U CN 203297183 U CN203297183 U CN 203297183U
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- Prior art keywords
- guide sleeve
- spool
- mounting hole
- push rod
- oil
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Abstract
The utility model relates to a manual pilot valve. The manual pilot valve comprises a valve body provided with a guide sleeve second mounting hole. The lower end of the guide sleeve second mounting hole is provided with a mounting step. The upper end cover of the valve body is provided with a valve cover provided with a built-in guide sleeve first mounting hole. The upper end of the valve cover is provided with a handle. A push rod guide sleeve is arranged on the mounting step. The upper end of the push rod guide sleeve is inserted in the guide sleeve first mounting hole in a matched mode. An external turning flange on the push rod guide sleeve is inserted in the guide sleeve second mounting hole in sealing mode. A guide sleeve adjusting gasket is padded between the upper end surface of the external turning flange and the valve cover or between the lower end surface of the external turning flange and the mounting step. The utility model provides the manual pilot valve for firmly fixing the push rod guide sleeve.
Description
Technical field
The utility model relates to the manual pilot valve that uses in a kind of engineering machinery.
Background technique
Manual pilot valve is the hydraulic product that is widely used in various engineering machinery and construction machinery equipment, Main Function is at the hydraulic system medium-long range, accurately to control the commutation of main reversing valve, and then control the accurate action of the executive components such as required oil hydraulic motor and oil cylinder, this type product is widely used in the walking hydraulic control of equipment at present.existing manual pilot valve as disclosed as Chinese patent CN202251182U " a kind of manual pilot valve ", in comprising, this manual pilot valve is provided with oil back chamber, control the valve body of oil duct and oil suction chamber, the upper end cap of valve body is equipped with valve gap, on valve body, also being provided with axis extends along the vertical direction, and respectively with oil back chamber, control the spool mounting hole that oil duct and oil suction chamber are communicated with, on the hole wall of spool mounting hole, between oil back chamber and control oil duct, be provided with upper annular boss, on the hole wall of spool mounting hole, in controlling between oil duct and oil suction chamber, be provided with lower annular boss, on, in the endoporus of lower annular boss, guiding is coated with spool, on valve body, in the top of spool, be provided with the Handleset that forces spool to move down, on valve body, be provided with and force the Returnning spring that moves on spool.Spool is the second order concentric structure that is provided with upper and lower convex shoulder, and the upper convex shoulder of spool coordinates with upper annular boss slipper seal, and the lower convex shoulder of spool coordinates with lower annular boss slipper seal, on upper convex shoulder and lower convex shoulder, offers respectively throttling groove and lower throttling groove.Handleset comprises by universal joint and is connected to the handle on valve gap, the lower end of handle is provided with gland, between gland and spool, pass through the push rod transmission, the push rod guiding is assemblied in the push rod guide sleeve, on valve gap, be provided with push rod guide sleeve the first mounting hole, the upper end of push rod guide sleeve is plugged in push rod guide sleeve the first mounting hole, the lower end of push rod guide sleeve is provided with the turn up flange of external diameter greater than push rod guide sleeve the first mounting hole diameter, the dense encapsulation of this flange that turns up is assigned in push rod guide sleeve the second mounting hole that arranges on valve body, the lower end of push rod guide sleeve the second mounting hole is provided with installation step, installation step has spacing being directed upwardly, and the step surface that coordinates for the lower end surface block with the flange that turns up, the turn up upper-end surface of flange coordinates and stops the push rod guide sleeve to move up with valve gap lower end block, the turn up lower end surface of flange coordinates and stops the push rod guide sleeve to move down with the step surface block of installation step, cooperation by valve gap and installation step is fixing spacing by the push rod guide sleeve.
The working procedure of manual pilot valve is: when Handleset is in meta, spool is subjected to action of reset spring power to be in upper position, the lower convex shoulder of spool seals oil suction chamber, control hydraulic oil and be closed in oil suction chamber, the hydraulic oil that enters from the control oil duct flows back to fuel tank through upper throttling groove, oil back chamber; When Handleset promotion spool overcomes acting force of the spring, move down, on upper convex shoulder and valve body, annular boss is sealed and matched, and controls oil duct and oil back chamber and is disconnected, thereby the hydraulic oil in oil suction chamber enters the control oil duct through lower throttling groove, realizes main valve work.
the problem that existing this manual pilot valve exists is: on valve gap and valve body, installation step coordinates to come and fixes the push rod guide sleeve is spacing, actual, add man-hour in other words, the step surface of installation step must be identical with the turn up thickness of flange on the push rod guide sleeve apart from the distance (being the hole depth of push rod guide sleeve the second mounting hole) between the upper end-hole of push rod guide sleeve the second mounting hole, the firm of guarantee push rod guide sleeve fixed, and due to the restriction of machining accuracy in actual production, the thickness of flange of turning up on the push rod guide sleeve is not often accomplished consistent with the hole depth of push rod guide sleeve the second mounting hole, and in order to guarantee that the push rod guide sleeve can install smoothly, the hole depth of push rod guide sleeve the second mounting hole generally can be a little more than the thickness of the flange that turns up on the push rod guide sleeve, this will cause the flange that turns up that an activity on above-below direction is arranged in push rod guide sleeve the second mounting hole, the push rod guide sleeve is fixing not firm, the hole wall of the flange that turns up meeting and push rod guide sleeve the second mounting hole weares and teares, affect the working life of push rod guide sleeve and valve body.In addition, due to upper throttling groove, arrange on the cylindricality circumferential surface of upper convex shoulder, on spool, move and make throttling groove be communicated with oil back chamber and control in the process of oil duct, can only come conducting to control oil duct and oil back chamber by throttling groove, in spool moved down and disconnects oil back chamber and the process of controlling oil duct, the closed process of throttling groove also can be very rapidly, in conducting and disconnecting oil back chamber and the process of controlling oil duct, the flow nonlinear change of hydraulic oil, the changes in flow rate of hydraulic oil is steady not; On the other hand, be gathered in the booty particle between annular boss on convex shoulder and valve body and can cause wearing and tearing to the outer circumferential face of spool and the hole wall of spool mounting hole, affect the working life of spool and valve body.
Summary of the invention
The purpose of this utility model is to provide a kind of push rod guide sleeve fixed manual pilot valve.
In order to address the above problem, the technical solution of the utility model is:
manual pilot valve, comprise the valve body that is provided with guide sleeve the second mounting hole, the lower end of guide sleeve the second mounting hole is provided with installation step, in being equipped with, establishes the upper end cap of valve body the valve gap of guide sleeve the first mounting hole, the upper end of valve gap is provided with handle, on described installation step, sit the push rod guide sleeve is housed, the upper end of push rod guide sleeve coincide and is plugged in described guide sleeve the first mounting hole, the flange seal that turns up on the push rod guide sleeve is inserted in described guide sleeve the second mounting hole, between the upper-end surface of the described flange that turns up and valve gap and/or between the lower end surface of the flange that turns up and installation step, pad guide sleeve adjusting pad is housed.
in described valve body, be provided with oil back chamber, control oil duct, oil suction chamber and axis extend along the vertical direction and are communicated with described oil back chamber, control the spool mounting hole of oil duct and oil suction chamber, in the spool mounting hole, guiding is coated with spool, on the hole wall of spool mounting hole, be provided with, lower annular boss, spool comprises the spool body, on the spool body, be provided be respectively used to described on, movingly upper of lower annular boss sealed sliding, lower convex shoulder, on lower convex shoulder, be provided with the lower throttling groove of controlling oil duct and oil suction chamber for conducting, on valve body, be provided with and force the Returnning spring that moves on spool, it is large that described upper convex shoulder lower end convexes with upper end diameter downwards, the frustum that lower end diameter is little, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, on the outer circumferential face of described frustum, offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber.
The span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
Described upper throttling groove be shaped as semicircle.
On the outer circumferential face of described spool body lower end, be provided with at least two circle balancing slits.
Between described Returnning spring and valve body, pad is equipped with spring adjusting pad.
Described lower throttling groove be shaped as U-shaped.
Described handle top is equipped with horn switch button, in described handle, be provided with along decreased food, extend, be used to installing the thread hole of the cable that is connected with horn switch button.
the beneficial effects of the utility model are: due to the restriction of machining accuracy, on the push rod guide sleeve, turning up the thickness of flange can be lower than the hole depth of push rod guide sleeve the second mounting hole, by at turn up flange and valve gap and/or the pad dress guide sleeve adjusting pad between flange and installation step that turns up, making up this height difference, thereby guarantee valve gap and the installation step reliable location to the push rod guide sleeve, the push rod guide sleeve not can and push rod guide sleeve the first mounting hole and push rod guide sleeve the second mounting hole between the relative sliding wearing and tearing occur, guaranteed the push rod guide sleeve, the working life of valve gap and valve body.
The accompanying drawing explanation
Fig. 1 is an embodiment's of the present utility model structural representation;
Fig. 2 is the partial schematic diagram of spool in Fig. 1;
Fig. 3 is the schematic diagram that coordinates of spool and valve body in Fig. 1;
Fig. 4 is the cross-sectional schematic of handle top in Fig. 1.
Embodiment
the embodiment of manual pilot valve is as shown in Fig. 1 ~ 4: in comprising, be provided with oil back chamber 28, control the valve body 1 of oil duct 31 and oil suction chamber 30, the upper end cap of valve body is equipped with valve gap 15, on valve body, being provided with axis extends along the vertical direction, and connection oil back chamber, control the spool mounting hole 33 of oil duct and oil suction chamber, on the hole wall of spool mounting hole, between oil back chamber and control oil duct, be provided with upper annular boss 50, on the hole wall of spool mounting hole, in controlling between oil duct and oil suction chamber, be provided with lower annular boss 51, on, in the endoporus of lower annular boss, guiding is coated with spool 2, spool comprises the spool body, on the spool body, be provided with and be respectively used to upper, lower annular boss sealed sliding upper convex shoulder 53 and lower convex shoulder 54 movingly, on lower convex shoulder, be provided with the lower throttling groove 34 of controlling oil duct and oil suction chamber for conducting, lower throttling groove be shaped as U-shaped, upper convex shoulder lower end convexes with the frustum 55 that upper end diameter is large, lower end diameter is little downwards, the Outside diameter of frustum is slightly less than the diameter of convex shoulder, so more help to store the booty particle, frustum and upper convex shoulder are coaxially set, on the outer circumferential face of frustum, offer the upper throttling groove 56 of controlling oil duct and oil back chamber for conducting, upper throttling groove be shaped as semicircle, the span of upper throttling groove on above-below direction is greater than the axial length of tapered sleeve.On valve body, in the upper end of spool, be provided with the Handleset that moves down be used to driving spool.Handleset comprises the handle 11 that is articulated in the valve gap top by universal joint 3, on handle, be provided with the gland 4 for the pushing tow push rod, on gland, be covered with boot seal 22, handle top is equipped with horn switch button 40, in handle, is provided with the thread hole 41 that the length bearing of trend is consistent with the decreased food bearing of trend and install for the cable that is connected with horn switch button.on valve body, be provided with guide sleeve 13, push rod 14 is threaded onto in the endoporus of guide sleeve by Yx RunddichtringO 12 sealing guiding, below and the spool of push rod are in transmission connection, the upper end of push rod is for coordinating with gland bottom pushing tow, the lower end of guide sleeve is provided with the flange 32 that turns up, the upper end of guide sleeve is plugged in guide sleeve the first mounting hole on valve gap, the flange that turns up of guide sleeve is inserted in guide sleeve the second mounting hole 25 on valve body by 10 sealings of O RunddichtringO, the lower end of guide sleeve the second mounting hole is provided with installation step 26, installation step has spacing be directed upwardly, for the step surface that coordinates with the flange bottom block that turns up, turn up the upper-end surface of flange and guide sleeve the first mounting hole lower stomidium along between pad two guide sleeves be housed regulate pads 19.the lower end of push rod is connected with spring seat 8, between spring seat and valve body and spool, be respectively equipped with Returnning spring 6 and driving spring 7, between Returnning spring and valve body, pad is equipped with spring adjusting pad, Returnning spring and driving spring all adopt the low-carbon spring steel silk, on the outer circumferential face of spool lower end, be provided with the balancing slit 36 of multi-turn along the axially spaced-apart setting of spool, spool top is provided with damping hole 38, damping hole has improved the operating characteristics of pilot valve, can reduce the impact of extraneous vibration on the valve operation, make the more stable work of pilot valve, improved simultaneously the service behaviour of reduction valve, reduce the motion frequency of spool, the wearing and tearing of spool have been reduced, increased functional reliability, the concentric guiding valve differential area design of the two-stage up and down of manual pilot valve uniqueness can effectively reduce control area, therefore the product steering force is less, can complete all the time accurately, but repetitive operation.Simultaneously just because of the differential area structural design of the concentric guiding valve of two-stage just makes the guiding valve underpart to be connected with return opening, and the damping hole structure is set becomes possibility; Semicircular upper throttling groove has increased the flow conductivity of upper throttling groove, and the upper end of upper throttling groove extends on convex shoulder, can make throttling groove control oil duct and oil back chamber prior to the gap conducting between frustum and upper annular boss, makes the oil return process more steady.
when Handleset is in meta, spool is in upper position in action of reset spring power, this moment, oil suction chamber was by the lower convex shoulder shutoff of spool, control oil duct by gap and oil back chamber conducting between upper throttling groove and frustum and upper annular boss, when needs oil suction chamber and the conducting of control oil duct, Handleset drives spool and moves down, upper throttling groove is gradually by shutoff, gap between frustum and upper annular boss also dwindles gradually simultaneously, gap between frustum and upper annular boss dwindles gradually the flow that makes to control hydraulic oil between oil duct and oil back chamber and diminishes gradually, the flow of hydraulic oil keeps linear change, changes in flow rate is steady, reduced the stream group, in like manner in the process of controlling oil duct and oil back chamber conducting, it is large that the flow of hydraulic oil becomes gradually, the flow of hydraulic oil is linear variation also, in addition, gap between frustum and upper annular boss can also store the booty particle, when spool moves down, the booty particle is stored in the gap between frustum and upper annular boss, can not damage the face that is sealed and matched of convex shoulder and upper annular boss, guarantee the working life of spool and valve body, while on spool, moving, booty particle in frustum and upper annular boss gap is rushed to oil back chamber by hydraulic oil, and then flows into corresponding fuel tank.
In other embodiment of this pedal pilot valve: according to the height difference of turning up between flange and push rod guide sleeve the second mounting hole, the number that guide sleeve is regulated pad can also be one, three or other number; The number of turns of balancing slit can also be a circle, three circle or other number of turns; Upper and lower throttling groove can also be other shape; The span that upper throttling groove is gone up along the vertical direction also can be equal to or less than the axial height of frustum; Guide sleeve is regulated pad and can also be arranged to turn up between flange and installation step or at the upper and lower end of the flange that turns up, guide sleeve is set all and regulate pad.
Claims (7)
1. manual pilot valve, comprise the valve body that is provided with guide sleeve the second mounting hole, the lower end of guide sleeve the second mounting hole is provided with installation step, in being equipped with, establishes the upper end cap of valve body the valve gap of guide sleeve the first mounting hole, the upper end of valve gap is provided with handle, on described installation step, sit the push rod guide sleeve is housed, the upper end of push rod guide sleeve coincide and is plugged in described guide sleeve the first mounting hole, the flange seal that turns up on the push rod guide sleeve is inserted in described guide sleeve the second mounting hole, it is characterized in that: between the upper-end surface of the described flange that turns up and valve gap and/or between the lower end surface of the flange that turns up and installation step, pad guide sleeve adjusting pad is housed.
2. manual pilot valve according to claim 1, it is characterized in that: in described valve body, be provided with oil back chamber, control oil duct, oil suction chamber and axis extend along the vertical direction and are communicated with described oil back chamber, control the spool mounting hole of oil duct and oil suction chamber, on the hole wall of spool mounting hole, between oil back chamber and control oil duct, be provided with upper annular boss, on the hole wall of spool mounting hole, in controlling between oil duct and oil suction chamber, be provided with lower annular boss, on, in the endoporus of lower annular boss, guiding is coated with spool, spool comprises the spool body, on the spool body, be provided be respectively used to described on, movingly upper of the corresponding sealed sliding of lower annular boss, lower convex shoulder, it is large that described upper convex shoulder lower end convexes with upper end diameter downwards, the frustum that lower end diameter is little, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, on the outer circumferential face of described frustum, offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber.
3. manual pilot valve according to claim 2, it is characterized in that: the span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
4. manual pilot valve according to claim 2 is characterized in that: described upper throttling groove be shaped as semicircle.
5. manual pilot valve according to claim 2, is characterized in that: on the outer circumferential face of described spool body lower end, be provided with two circle balancing slits at least.
6. manual pilot valve according to claim 2, is characterized in that: on described valve body, be provided with and force the Returnning spring that moves on spool, between described Returnning spring and valve body, pad spring adjusting pad is housed.
7. manual pilot valve according to claim 2 is characterized in that: on described lower convex shoulder, be provided with the lower throttling groove of controlling oil duct and oil suction chamber for conducting, described lower throttling groove be shaped as U-shaped.
8.The described manual pilot valve of according to claim 1 ~ 7 any one, it is characterized in that: described handle top is equipped with horn switch button, in described handle, be provided with along decreased food, extend, be used to installing the thread hole of the cable that is connected with horn switch button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202875757U CN203297183U (en) | 2013-05-24 | 2013-05-24 | Manual pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202875757U CN203297183U (en) | 2013-05-24 | 2013-05-24 | Manual pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297183U true CN203297183U (en) | 2013-11-20 |
Family
ID=49573193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202875757U Expired - Fee Related CN203297183U (en) | 2013-05-24 | 2013-05-24 | Manual pilot valve |
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| Country | Link |
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| CN (1) | CN203297183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214409A (en) * | 2014-07-11 | 2014-12-17 | 柳州柳工液压件有限公司 | Positioning device of manual pressure-reducing type proportional pilot valve |
-
2013
- 2013-05-24 CN CN2013202875757U patent/CN203297183U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214409A (en) * | 2014-07-11 | 2014-12-17 | 柳州柳工液压件有限公司 | Positioning device of manual pressure-reducing type proportional pilot valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 453000 Jiefang Road, Henan, Xinxiang, No. 1 Patentee after: Xinxiang Pingyuan Aviation Equipment Co., Ltd. Address before: 453000 Jiefang Road, Henan, Xinxiang, No. 1 Patentee before: Pingyuan Machine Factory (Xinxiang) |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20210524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |