CN103994121A - Automatic drainage device for surplus hydraulic oil in hydraulic actuator driving cavity - Google Patents
Automatic drainage device for surplus hydraulic oil in hydraulic actuator driving cavity Download PDFInfo
- Publication number
- CN103994121A CN103994121A CN201310052946.8A CN201310052946A CN103994121A CN 103994121 A CN103994121 A CN 103994121A CN 201310052946 A CN201310052946 A CN 201310052946A CN 103994121 A CN103994121 A CN 103994121A
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- hydraulic actuator
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Abstract
The invention discloses an automatic drainage device for surplus hydraulic oil in a hydraulic actuator driving cavity. According to the structure, horizontal through holes and inclined through holes are formed in the two ends of a piston rod of a hydraulic actuator in the central axis, the inclined through holes are communicated with the horizontal through holes and the hydraulic actuator driving cavity, steps are arranged on the front sections of the horizontal through holes, internal threads are arranged on the rear sections of the horizontal through holes, two steel balls and two springs are sequentially arranged in the horizontal through holes in the two ends of the piston rod, the steel balls abut against the steps on the front sections of the horizontal through holes, and two thread sleeves are screwed into the horizontal through holes in the two ends of the piston rod respectively and abut against the springs. According to the automatic drainage device for the surplus hydraulic oil in the hydraulic actuator driving cavity, arrangement is easy, the design structure of an original hydraulic actuator is completely reserved, the surplus hydraulic oil in the hydraulic actuator driving cavity is automatically drained in the actuating process of the hydraulic actuator, the service life and the maintenance period of the hydraulic actuator are prolonged, environmental pollution is reduced, and normal running of the hydraulic actuator is ensured.
Description
Technical field
The present invention relates to the automatic draining structure of unnecessary hydraulic oil in a kind of hydraulic actuator actuator chamber.
Background technique
Hydraulic actuator normally consists of cylinder body, piston rod, actuation gear, seal ring, end cap and two oil inlet and outlets etc.Hydraulic actuator is when work, by hydraulicdirectional control valve, switched the direction of power fluid force feed, for example power fluid force feed enters cylinder body from " pass " end, promoting cylinder body inner piston rod moves right, it is moving that the rack drives actuation gear of piston rod is done clockwise transhipment, and the hydraulic oil of the cylinder body the other end is discharged cylinder body from " opening " end; Otherwise power fluid force feed enters cylinder body from " opening " end, promote cylinder body inner piston rod and be moved to the left, it is moving that the rack drives actuation gear of piston rod is done counterclockwise transhipment, and the hydraulic oil of the cylinder body the other end is discharged cylinder body from " pass " end; Between its tooth bar at piston rod and actuation gear, form actuator chamber.
Conventionally the two ends of piston rod are all equipped with V-shaped seal ring and are formed an airtight cavity with cylinder body, and when piston reciprocating move, hydraulic oil can be accumulated between piston rod and cylinder wall, plays lubricated effect, still also can be at actuator chamber cylinder accumulation.If the reasons such as reason, wearing and tearing, scuffing or V-shaped seal ring wearing and tearing of particularly processing due to cylinder body, the working pressure of adding power fluid force feed is higher, hydraulic pressure is generally at 6-14Mpa, therefore just probably the hydraulic oil of minute quantity is entered in the actuator chamber of hydraulic actuator, along with being accumulated in the hydraulic oil of actuator chamber, increase, pressure is progressively raise, will cause the weak part oil impregnate of actuator chamber, the serious normal operation and the working life that affect hydraulic actuator, the seepage of hydraulic oil is to working site and environment simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide the automatic draining structure of unnecessary hydraulic oil in a kind of hydraulic actuator actuator chamber, this structure arranges simply, the project organization that retains former hydraulic actuator completely, in hydraulic actuator course of action, automatically drain unnecessary hydraulic oil in actuator chamber, working life and the maintenance period of hydraulic actuator have been extended, reduce environmental pollution, guaranteed the normal operation of hydraulic actuator.
For solving the problems of the technologies described above, in hydraulic actuator actuator chamber of the present invention, the automatic draining structure of unnecessary hydraulic oil comprises cylinder body, piston rod, actuation gear and two oil inlet and outlets, described piston rod bottom surface is provided with tooth bar and is positioned at described cylinder body, described actuation gear is located at described cylinder body middle part and is meshed with the tooth bar of described piston rod, between described piston rod and actuation gear, form actuator chamber, described two oil inlet and outlets are located at respectively described cylinder body two ends and are communicated with respectively the cavity at piston rod two ends, this structure also comprises two steel balls, two springs and two thread bushs, described piston rod two ends are respectively equipped with the inclined via-hole of horizontal through hole and the described horizontal through hole of connection and described actuator chamber along central axis, described horizontal through hole leading portion is provided with step, back segment is provided with internal thread, described two steel balls and two springs be located at successively respectively in the horizontal through hole at described piston rod two ends and described steel ball against the step of horizontal through hole leading portion, described two thread bushs are twisted respectively in the horizontal through hole at described piston rod two ends and against described spring.
Further, above-mentioned horizontal through hole leading portion step is provided with the chamfering identical with described steel ball.
Because the automatic draining structure of unnecessary hydraulic oil in hydraulic actuator actuator chamber of the present invention has adopted technique scheme, be that this structure is respectively equipped with the inclined via-hole of horizontal through hole and connection horizontal through hole and hydraulic actuator actuator chamber at the piston rod two ends of hydraulic actuator along central axis, horizontal through hole leading portion is provided with step, back segment is provided with internal thread, two steel balls and two springs be located at successively respectively in the horizontal through hole at piston rod two ends and steel ball against the step of horizontal through hole leading portion, two thread bushs are twisted respectively in the horizontal through hole at piston rod two ends and against spring.This structure arranges simply, the project organization that retains former hydraulic actuator completely is automatically drained unnecessary hydraulic oil in actuator chamber in hydraulic actuator course of action, has extended working life and the maintenance period of hydraulic actuator, reduce environmental pollution, guaranteed the normal operation of hydraulic actuator.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the automatic draining structure schematic diagram of unnecessary hydraulic oil in hydraulic actuator actuator chamber of the present invention;
Fig. 2 is the enlarged view of A portion in Fig. 1.
Embodiment
As depicted in figs. 1 and 2, in hydraulic actuator actuator chamber of the present invention, the automatic draining structure of unnecessary hydraulic oil comprises cylinder body 1, piston rod 2, actuation gear 3 and two oil inlet and outlets 5, described piston rod 2 bottom surfaces are provided with tooth bar 21 and are positioned at described cylinder body 1, described actuation gear 3 is located at described cylinder body 1 middle part and is meshed with the tooth bar 21 of described piston rod 2, between described piston rod 2 and actuation gear 3, form actuator chamber 4, described two oil inlet and outlets 5 are located at respectively described cylinder body 1 two ends and are communicated with respectively the cavity at piston rod 2 two ends, this structure also comprises two steel balls 8, two springs 9 and two thread bushs 10, described piston rod 2 two ends are respectively equipped with the inclined via-hole 7 of horizontal through hole 6 and the described horizontal through hole 6 of connection and described actuator chamber 4 along central axis, described horizontal through hole 6 leading portions are provided with step 61, back segment is provided with internal thread, described two steel balls 8 and two springs 9 be located at successively respectively in the horizontal through hole 6 at described piston rod 2 two ends and described steel ball 8 against the step 61 of horizontal through hole 6 leading portions, described two thread bushs 10 are twisted respectively in the horizontal through hole 6 at described piston rod 2 two ends and against described spring 9.
Further, above-mentioned horizontal through hole 6 leading portion steps 61 are provided with the chamfering 62 identical with described steel ball.This chamfering plays further raising steel ball guiding and seal action.
In hydraulic actuator when work,, by two oil inlet and outlet oil-feeds or oil return, be subject to pressure side in any side of piston rod, and under the promotion of power fluid force feed, steel ball seals the horizontal through hole of piston rod, does not therefore affect normal running and the use of hydraulic actuator.When the hydraulic oil in hydraulic actuator actuator chamber runs up to some and has certain pressure, oil return one side at piston rod, the hydraulic fluid pressure of actuator chamber accumulation is greater than the pressure of oil return, this pressure difference overcomes the thrust of spring steel ball is backed down, make hydraulic oil in actuator chamber be discharged to oil return one side of piston rod, and get back to system hydraulic oil container by return line, thereby the hydraulic oil in actuator chamber is discharged.In this structure, by thread bush, adjust the pressure of spring, can set the head pressure of hydraulic oil in actuator chamber, realize the object of the interior unnecessary hydraulic oil of excretion actuator chamber automatically.
Claims (2)
1. the automatic draining structure of unnecessary hydraulic oil in a hydraulic actuator actuator chamber, comprise cylinder body, piston rod, actuation gear and two oil inlet and outlets, described piston rod bottom surface is provided with tooth bar and is positioned at described cylinder body, described actuation gear is located at described cylinder body middle part and is meshed with the tooth bar of described piston rod, between described piston rod and actuation gear, form actuator chamber, described two oil inlet and outlets are located at respectively described cylinder body two ends and are communicated with respectively the cavity at piston rod two ends, it is characterized in that: this structure also comprises two steel balls, two springs and two thread bushs, described piston rod two ends are respectively equipped with the inclined via-hole of horizontal through hole and the described horizontal through hole of connection and described actuator chamber along central axis, described horizontal through hole leading portion is provided with step, back segment is provided with internal thread, described two steel balls and two springs be located at successively respectively in the horizontal through hole at described piston rod two ends and described steel ball against the step of horizontal through hole leading portion, described two thread bushs are twisted respectively in the horizontal through hole at described piston rod two ends and against described spring.
2. the automatic draining structure of unnecessary hydraulic oil in hydraulic actuator actuator chamber according to claim 1, is characterized in that: described horizontal through hole leading portion step is provided with the chamfering identical with described steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310052946.8A CN103994121B (en) | 2013-02-19 | 2013-02-19 | The unnecessary automatic draining structure of hydraulic oil in hydraulic actuator driving chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310052946.8A CN103994121B (en) | 2013-02-19 | 2013-02-19 | The unnecessary automatic draining structure of hydraulic oil in hydraulic actuator driving chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103994121A true CN103994121A (en) | 2014-08-20 |
| CN103994121B CN103994121B (en) | 2017-10-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310052946.8A Expired - Fee Related CN103994121B (en) | 2013-02-19 | 2013-02-19 | The unnecessary automatic draining structure of hydraulic oil in hydraulic actuator driving chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN103994121B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321547A (en) * | 2016-08-19 | 2017-01-11 | 桂林福冈新材料有限公司 | Stable oscillating cylinder and method |
| CN106351911A (en) * | 2016-08-19 | 2017-01-25 | 桂林福冈新材料有限公司 | Piston type swing cylinder and method |
| WO2019056842A1 (en) * | 2017-09-20 | 2019-03-28 | 沈阳东北电力调节技术有限公司 | Integrated rotary cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB826460A (en) * | 1958-07-14 | 1960-01-06 | Steiner Carl | Fluid pressure motor |
| US3288035A (en) * | 1962-08-06 | 1966-11-29 | Pleiger Maschf Paul | Motion transmitting apparatus |
| CN2898399Y (en) * | 2006-03-31 | 2007-05-09 | 王枭 | Gear and rack swing hydraulic cylinder |
| CN201412406Y (en) * | 2009-03-30 | 2010-02-24 | 张伟 | Rack and pinion oscillating oil cylinder |
| CN201687799U (en) * | 2010-04-22 | 2010-12-29 | 杭州瑞诺机械有限公司 | One-way oil cylinder pressure device |
-
2013
- 2013-02-19 CN CN201310052946.8A patent/CN103994121B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB826460A (en) * | 1958-07-14 | 1960-01-06 | Steiner Carl | Fluid pressure motor |
| US3288035A (en) * | 1962-08-06 | 1966-11-29 | Pleiger Maschf Paul | Motion transmitting apparatus |
| CN2898399Y (en) * | 2006-03-31 | 2007-05-09 | 王枭 | Gear and rack swing hydraulic cylinder |
| CN201412406Y (en) * | 2009-03-30 | 2010-02-24 | 张伟 | Rack and pinion oscillating oil cylinder |
| CN201687799U (en) * | 2010-04-22 | 2010-12-29 | 杭州瑞诺机械有限公司 | One-way oil cylinder pressure device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321547A (en) * | 2016-08-19 | 2017-01-11 | 桂林福冈新材料有限公司 | Stable oscillating cylinder and method |
| CN106351911A (en) * | 2016-08-19 | 2017-01-25 | 桂林福冈新材料有限公司 | Piston type swing cylinder and method |
| WO2019056842A1 (en) * | 2017-09-20 | 2019-03-28 | 沈阳东北电力调节技术有限公司 | Integrated rotary cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103994121B (en) | 2017-10-24 |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 Termination date: 20200219 |