CN201237020Y - Valve rod positioning device of hydraulic valve - Google Patents
Valve rod positioning device of hydraulic valve Download PDFInfo
- Publication number
- CN201237020Y CN201237020Y CNU2008201624233U CN200820162423U CN201237020Y CN 201237020 Y CN201237020 Y CN 201237020Y CN U2008201624233 U CNU2008201624233 U CN U2008201624233U CN 200820162423 U CN200820162423 U CN 200820162423U CN 201237020 Y CN201237020 Y CN 201237020Y
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- valve
- valve rod
- holes
- hole
- valve stem
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of engineering machinery, and relates to a locating device on a valve stem of a hydraulic valve, which comprises a valve body, a end closure and the valve stem, and is characterized in that step-holes are opened at the tail end of the valve stem, wherein, deep holes are connected with the front end of a locating screw through screw threads, and shallow holes are used as locating holes and are close matched with a cylindrical surface at the middle part of the locating screw; valve stem holes, through which the valve stem runs, are opened as the step-holes on the valve body, wherein, the deep holes are matched with the valve stem, and the shallow holes are used as the locating holes and are matched with the cylindrical surface on a flange of a keep plate in a closely attached manner; and the locating device ensures the locating screw and the valve stem as well as the keep plate and the valve stem to be coaxial accurately, thereby leading the installation precision of the valve stem to be increased obviously. The locating device has the beneficial effects as follows: the operating force of the hydraulic valve can be well reduced, and the valve-blocking problem of the hydraulic valve can be well overcome, the friction losses of corresponding parts on the hydraulic valve can also be reduced, the service life of the hydraulic valve can be prolonged, the work is reliable, and the structure is simple.
Description
Technical field
The utility model belongs to technical field of engineering machinery, relates to a kind of positioning device of hydrovalve valve rod.
Background technique
At present, known engineering machinery, as loader, the valve rod of its hydrovalve must accurately be positioned at coaxial position, hydraulic valve body upper valve rod hole on, but owing to be threaded, factor such as machining accuracy, the axis in the axis of valve rod and valve body upper valve rod hole is difficult for reaching inregister, hydrovalve is easy to generate various mechanical forces in commutation process in addition, these mechanical forces further make valve rod depart from the central position in valve body upper valve rod hole again, produce bigger hydraulic card clamping force.In the known hydrovalve spring-positioning device as shown in Figure 1, valve rod 1 is contained in the valve body 2, and pad shape pressing plate 3 is pressed on the valve body by end cap 8, and on valve rod 1, end cap 8 is connected on the valve body 2 by screw 9 screw 5 by scyewed joint.Like this, hydrovalve valve rod 1, end cap 8, positioning screwn 5 etc. are difficult for accurately being positioned on the position with the same axis in valve body 2 upper valve rod holes, make hydrovalve in commutation process, be easy to generate various mechanical forces, thereby steering force is heavier in the hydrovalve working procedure, is easy to generate " card valve " phenomenon.
The model utility content
It is heavy or " card valve " problem for steering force in the commutation process that overcomes existing hydrovalve that the utility model provides a kind of purpose of positioning device of hydrovalve valve rod.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of positioning device of hydrovalve valve rod comprises valve body, end cap, valve rod, it is characterized in that the tail end of valve rod is split into step hole, and its medium-length hole is threaded with the positioning screwn front end, and shallow bore hole is as cylndrical surface closely connected cooperate of positioning hole with the positioning screwn middle part.
The valve rod hole that runs through for valve rod on the valve body is split into step hole, and its medium-length hole cooperates with valve rod, and shallow bore hole is as cylndrical surface closely connected cooperate of positioning hole with pressing plate flange position.
The utility model is because the tail end of valve rod is shaped on closely connected cooperation of cylndrical surface in the middle part of positioning hole and the positioning screwn.Guaranteed the accurate coaxial of positioning screwn and valve rod; Also be shaped on closely connected cooperation of cylndrical surface at positioning hole and pressing plate flange position on the valve body, guaranteed the accurate coaxial of pressing plate and valve rod.Thereby the installation validity of valve rod is improved significantly.Its beneficial effect is, can reduce the steering force of hydrovalve well and overcome " card valve " (hydraulic lock) problem of hydrovalve, can also reduce the abrasion of the corresponding part of hydrovalve, prolongs the working life of hydrovalve, and reliable operation is simple in structure.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is known hydrovalve spring positioning means for positioning structural drawing.
Fig. 2 is hydrovalve spring of the present utility model location embodiment's positioning device structure figure.
Fig. 3 is hydrovalve steel ball of the present utility model location embodiment's positioning device structure figure.
Embodiment
In embodiment illustrated in fig. 2, have the step valve rod hole that runs through for valve rod 1 on the valve body 2, the flange position 31 closely connected cooperations that are enclosed within the positioning plate 3 on the valve rod 1 are positioned on the step of valve rod hole (hole, big footpath); The tail end of valve rod 1 is split into step hole, its medium-length hole is threaded with positioning screwn 5 front ends, shallow bore hole is as cylndrical surface closely connected cooperate of positioning hole with positioning screwn 5 middle parts, and promptly positioning screwn 5 is by positioning hole (hole, the big footpath) location of valve rod 1 tail end, and by scyewed joint on valve rod; Spring seat 4 is enclosed within on the valve rod 1, is located by valve rod; Spring seat 7 is contained on the nut body of positioning screwn 5, and spring 6 is sleeved between spring seat 4 and the spring seat 7, and end cap 8 covers are pressed in positioning plate 3, are located by positioning plate 3, and are fixed on the valve body 2 by screw 9.Like this, each corresponding part all be in coaxial position, valve body 2 upper valve rod holes on, the axial position that valve rod moves in valve body hole is limited by spring seat.
In the embodiment shown in fig. 3, valve rod 1 and positioning plate 3 flange positions 31 are positioned in the valve rod hole on the valve body 2, like this valve rod 1, positioning plate 3 can both be coaxial with the valve rod hole of valve body 2; Steel ball seat 4 (positioning screwn that is equivalent to the foregoing description) is by positioning hole (hole, the big footpath) location of valve rod 1 tail end, and by scyewed joint, realization steel ball seat 4 is coaxial with valve rod 1, also just coaxial with valve body 2 upper valve body holes; Spring 5 is contained in the steel ball seat radial direction through hole, and two steel balls 6 are contained on the steel ball seat radial direction through hole port and with spring 5 and contact, by steel ball seat 4 location, so two steel balls 6 also be distributed in coaxial position, valve body 2 upper valve rod holes on; Lining 7 is contained in the end cap 8, by end cap 8 location, end cap 8 covers are pressed in positioning plate 3, by positioning plate 3 location, and be fastened on the valve body 2 by screw 9, the axial position of valve rod 1 in valve body hole limited by each grade circular arc annular groove on the lining, steel ball seat, steel ball of cooperating with the circular arc annular groove etc., like this, lining 7, end cap 8 are also coaxial with valve body upper valve rod hole, thus each the corresponding part that has guaranteed this positioning device all be in coaxial position, valve body upper valve rod hole on.
Claims (2)
1, a kind of positioning device of hydrovalve valve rod comprises valve body, end cap, valve rod, it is characterized in that the tail end of valve rod is split into step hole, and its medium-length hole is threaded with the positioning screwn front end, and shallow bore hole is as cylndrical surface closely connected cooperate of positioning hole with the positioning screwn middle part.
2, according to the positioning device of the described hydrovalve valve rod of claim 1, it is characterized in that the valve rod hole that runs through for valve rod on the valve body is split into step hole, its medium-length hole cooperates with valve rod, and shallow bore hole is as cylndrical surface closely connected cooperate of positioning hole with pressing plate flange position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201624233U CN201237020Y (en) | 2008-08-12 | 2008-08-12 | Valve rod positioning device of hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201624233U CN201237020Y (en) | 2008-08-12 | 2008-08-12 | Valve rod positioning device of hydraulic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201237020Y true CN201237020Y (en) | 2009-05-13 |
Family
ID=40649751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201624233U Expired - Fee Related CN201237020Y (en) | 2008-08-12 | 2008-08-12 | Valve rod positioning device of hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201237020Y (en) |
-
2008
- 2008-08-12 CN CNU2008201624233U patent/CN201237020Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG HERCULES HYDRAULIC CO., LTD. Free format text: FORMER OWNER: LINHAI DUOYIER MACHINERY CO., LTD. Effective date: 20120426 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120426 Address after: 317000 Zhejiang Taizhou coastal economic development zone (Luohe River) Patentee after: Zhejiang Hercules Hydraulic Co., Ltd. Address before: 317000 Linhai Zhejiang Linhai Economic Development Zone (Luohe River) Linhai Doyle Machinery Co., Ltd. Patentee before: Linhai Duoyier Machinery Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20150812 |
|
| EXPY | Termination of patent right or utility model |