CN101245795A - Clamping type feedback lever - Google Patents
Clamping type feedback lever Download PDFInfo
- Publication number
- CN101245795A CN101245795A CNA2007100374993A CN200710037499A CN101245795A CN 101245795 A CN101245795 A CN 101245795A CN A2007100374993 A CNA2007100374993 A CN A2007100374993A CN 200710037499 A CN200710037499 A CN 200710037499A CN 101245795 A CN101245795 A CN 101245795A
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- China
- Prior art keywords
- feedback
- feedback rod
- spool
- clamping type
- hole
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- Mechanically-Actuated Valves (AREA)
Abstract
The invention provides a clamp typed feedback rod which mainly solves the technical problems of improving manufacture process and enhancing the performance of a servo valve, etc. The technical proposal of the clamp typed feedback rod is that a valve core is provided with a screw hole in the axial direction; one end of the feedback rod passes through the valve core and vertically passes through the screw hole; two clamping screws are respectively screwed in the screw hole; the ends of the two clamping screws respectively pushes against the external surface at the two sides of the feedback rod. the clamp typed feedback rod is suitable for various electro-hydraulic servo valves.
Description
Technical field:
The present invention relates to the assembly of a kind of electrohydraulic control, particularly a kind of electrohydraulic control.
Background technique:
Electrohydraulic control is the servo control element in the oilhydraulic engineering, the transferring structure of its feedback moment, normally spool is provided with receiving hole, the end of its feedback rod is to be plugged in this receiving hole, one end of feedback rod is fixed, when spool moves, spool is passed the feedback rod end, make feedback rod produce resiliently deformable, thereby be formed with a feedback moment, at these characteristics, the feedback rod end of existing electrohydraulic control all is made into and is coccoid and is plugged in the spool, its construction features have the spheroid and the body of rod to be one machine shaping, also have a moulding bead to be welded in the structure of rod end, and above-mentioned existing structure has following shortcoming:
1. the size of bead is less, and bead and the little accuracy of manufacturing of spool receiving hole matching gap are had relatively high expectations, thereby mechanical processing difficulty is big, and fabricating cost heightens thereupon;
2. in the course of the work, bead and valve core chamber produce and slide and the formation wearing and tearing, and wearing and tearing form bead and the spool receiving hole produces the gap, and the increase in this gap will influence the ride quality of servovalve.
3 beads wearing and tearing back maintenance difficult all needs processing again usually, increases maintenance cost;
4. when feedback rod and bead are welded structure, there is the hidden danger that comes off.
Summary of the invention:
Technical problem to be solved by this invention is, a kind of improved clamping type feedback lever is provided, it can keep the due function of feedback rod, can simplify and improve the preparation process of feedback rod and maintenance condition again, reduce owing to the negative effect that wearing and tearing bring to servovalve, improve the member functional reliability, and reduce simultaneously and make and maintenance cost.
The technological scheme that the present invention solves the problems of the technologies described above employing is: clamping type feedback lever includes spool and feedback rod, be characterized in being provided with screw in the axial centre of spool, one end of feedback rod shaft stretches through spool also vertically through screw, be installed with clamp screws in this screw respectively, two clamp screws ends are held in the outer surface of both sides, feedback rod end respectively.When spool moves,, make feedback rod produce resiliently deformable and set up feedback moment through two clamp screws drive feedback bars.
The present invention replaces existing feedback rod end bulbous configuration with clamping structure, can keep the feedback rod proper function, and the cooperation of feedback rod and clamp screws is less demanding in the clamping structure, greatly reduce difficulty of processing and corresponding processing cost, clamp screws is installed the back and is difficult for loosening generation gap, even there is the loosening turn screw that also can make things convenient for to keep clamping, thereby eliminates its negative effect to valve performance, this structure maintenance is very convenient, and can fundamentally eliminate the baneful influence that bead comes off.
Description of drawings:
Fig. 1 is that clamping type feedback lever vertical profile of the present invention is looked schematic representation.
Embodiment:
With reference to Fig. 1, clamping type feedback lever includes spool 1, feedback rod 2 and two clamp screws 3,3 '.
Spool 1, its external structure and existing structure are same or similar, characteristics of the present invention are that valve core 11 longitudinal center lines of spool 1 are provided with a through hole 12, smaller place is provided with screw 13 at through hole 12 stage casing section diameters, this screw 13 also can be the section of symmetry, it is bigger or be same as the through hole of screw 13 core diameter of thread that two sections centres are connected with a diameter, middle part at through hole 12, be provided with receiving hole 14, the center line of receiving hole 14 also intersects perpendicular to the center line of through hole 12, and receiving hole 14 passes through hole 12 and is drilled with taper hole on the wall within it.
The structure and the existing structure of fixed end 22 and shaft 22 are same or similar; Free end at shaft 22 is provided with cylindrical body 23, and the diameter of cylindrical body 23 is slightly less than the aperture of the receiving hole 14 of spool 1, and the length of cylindrical body 23 should be able to be extended through receiving hole 14 through through hole 12; The front end of cylindrical body 23 is tapered ends 24, and this tapered end 24 just and the taper hole correspondence of receiving hole 14.
Two clamp screws 3,3 ' structure are identical, include hold segment 31,31 ', thread section 32,32 ' and the groove 33,33 ' that spins be one, hold segment 31,31 ' is cylindrical body, and its diameter is to be slightly less than thread section 32,32 ' core diameter of thread and to the diameter of spool 1 through hole 12 that should section; Two clamp screws 3,3 ' hold segment 31,31 ' the corresponding the other end are provided with the groove 33,33 ' that spins, and install or regulate clamp screws 3,3 ' in order to borrow screw-driver.
During installation, the cylindrical body 23 of feedback rod 2 is inserted the receiving hole 14 of spool 1, and pass through hole 12, be positioned in the taper hole of spool 1 internal chamber wall portion with tapered end 24 again, screw in clamp screws 3,3 ' respectively from the two ends of through hole 12 subsequently, outer surface until clamp screws 3,3 ' gripping section 31,31 ' hold at feedback rod 2 cylindrical bodys 23 clamps feedback rod 2; When spool moves, but, reach the function of setting up feedback moment thereby make feedback rod 2 produce resiliently deformable by two clamp screws 3,3 ' the drive feedback bar 2; Install or using process in, all can rotate two clamp screws 3,3 ' easily, make feedback rod 2 and two clamp screws 3,3 ' contact end face and can not become flexible and produce the gap, eliminate its negative effect to valve performance; The present invention is simple in structure, and preparation process is less demanding, and installation and maintenance is also more convenient.
Claims (5)
1. a clamping type feedback lever comprises spool and feedback rod, it is characterized in that:
A. the axial centre at spool (1) is provided with screw (13);
B. an end of feedback rod (2) shaft (22) stretches through spool (1) also vertically through screw (13);
C. be installed with clamp screws (3,3 ') in screw (13) respectively, two clamp screws (3,3 ') end is held in the outer surface of feedback rod (2) both sides, end respectively.
2. clamping type feedback lever according to claim 1 is characterized in that spool (1) axial centre is provided with through hole (12), and the center section part branch of through hole (12) is formed with screw (13).
3. clamping type feedback lever according to claim 1, the end that it is characterized in that feedback rod (2) are the cylindrical body (23) that a diameter is slightly larger than shaft (22), and two clamp screws (3,3 ') are held in the cylindrical outer surface of cylindrical body (23) respectively.
4. according to claim 1 or 3 described clamping type feedback levers, the front end that it is characterized in that the cylindrical body (23) of feedback rod (2) is a tapered end (24), and tapered end (24) holds in the taper hole of spool (1) receiving hole (14).
5. clamping type feedback lever according to claim 1 is characterized in that two clamp screws (3,3 ') end is provided with the groove that spins (33,33 ') of installing or regulating usefulness, and the other end is provided with cylindrical gripping section (31,31 ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100374993A CN101245795A (en) | 2007-02-13 | 2007-02-13 | Clamping type feedback lever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100374993A CN101245795A (en) | 2007-02-13 | 2007-02-13 | Clamping type feedback lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101245795A true CN101245795A (en) | 2008-08-20 |
Family
ID=39946422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100374993A Pending CN101245795A (en) | 2007-02-13 | 2007-02-13 | Clamping type feedback lever |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101245795A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090049A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Novel spool structure |
| CN105909587A (en) * | 2016-07-06 | 2016-08-31 | 上海衡拓液压控制技术有限公司 | Force feedback structure for electro-hydraulic servo valve |
| CN104454731B (en) * | 2014-11-29 | 2017-03-22 | 南京萨伯工业设计研究院有限公司 | Servo feedback rod and machining method thereof |
| CN107883050A (en) * | 2017-11-14 | 2018-04-06 | 国家电网公司 | A kind of general valve core of the electromagnetic valve action feedback device |
| CN108980147A (en) * | 2018-09-12 | 2018-12-11 | 山西东润精益电力液压控制有限公司 | A kind of discharge characteristic degeneration monitoring method and its device |
-
2007
- 2007-02-13 CN CNA2007100374993A patent/CN101245795A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090049A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Novel spool structure |
| CN104454731B (en) * | 2014-11-29 | 2017-03-22 | 南京萨伯工业设计研究院有限公司 | Servo feedback rod and machining method thereof |
| CN105909587A (en) * | 2016-07-06 | 2016-08-31 | 上海衡拓液压控制技术有限公司 | Force feedback structure for electro-hydraulic servo valve |
| CN107883050A (en) * | 2017-11-14 | 2018-04-06 | 国家电网公司 | A kind of general valve core of the electromagnetic valve action feedback device |
| CN108980147A (en) * | 2018-09-12 | 2018-12-11 | 山西东润精益电力液压控制有限公司 | A kind of discharge characteristic degeneration monitoring method and its device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080820 |