CN104675798A - Adjustable mechanical self-locking hydraulic cylinder - Google Patents
Adjustable mechanical self-locking hydraulic cylinder Download PDFInfo
- Publication number
- CN104675798A CN104675798A CN201510100419.9A CN201510100419A CN104675798A CN 104675798 A CN104675798 A CN 104675798A CN 201510100419 A CN201510100419 A CN 201510100419A CN 104675798 A CN104675798 A CN 104675798A
- Authority
- CN
- China
- Prior art keywords
- locking
- rear end
- piston
- cylinder barrel
- end cover
- 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.)
- Granted
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
Abstract
The invention discloses an adjustable mechanical self-locking hydraulic cylinder and relates to a hydraulic executing element. The adjustable mechanical self-locking hydraulic cylinder is provided with a cylinder barrel; a piston is mounted in the cylinder barrel; a piston rod is mounted on the piston; front and rear end covers are correspondingly mounted at the front and rear ends of the cylinder barrel in a detachable manner; oil inlet and outlets are formed on the wall of the cylinder barrel; a center through hole is formed at the center of the piston rod; a positioning baffle and a baffle spring are mounted in the center through hole; the positioning baffle is in sliding fit with the surface of the center through hole; grooves are symmetrically formed on the inner wall of the front end of the center through hole; locking blocks are arranged in the grooves; locking block springs are arranged between the locking blocks and the bottom ends of the grooves; a lock rod is mounted in a head port; one end of the lock rod extends out of the rear end cover; clamping grooves are symmetrically formed up and down at the other end of the lock rod; the bottom end of the locking blocks are matched with the clamping grooves; a locking device is arranged at the joint of the lock rod and the rear end cover; oil inlet small holes are symmetrically formed on the wall of the piston end close to the rear end cover. By the mechanical self-locking structure of the adjustable mechanical self-locking hydraulic cylinder, a self-locking function is implemented at the corresponding position, so that the application range of the hydraulic cylinder is further widened.
Description
Technical field
The present invention relates to hydraulic actuator, specifically a kind of adjustable type mechanical type self locking hydraulic cylinder, has and realize auto-lock function at diverse location, and precision is high, safe and reliable, can keep the mechanical type self locking hydraulic cylinder of long-time locking.
Background technique
Hydraulic transmission because its specific power is large, be easy to realize the high and various occasions such as extensive use farm machinery, engineering machinery, Aero-Space of stepless speed regulation, standardization, automaticity.Oil hydraulic cylinder is as one of the important executive component of hydraulic system, and being almost one of requisite element in all hydraulic transmission system, is realize reciprocating important means in hydraulic system, and this is also one of considerable advantage of hydraulic transmission relative mechanical transmission.In some occasion, need executive component to maintain static for a long time, the oil hydraulic cylinder with auto-lock function produces for this requirement just.Normal conditions, the oil hydraulic cylinder realizing auto-lock function mainly contains three kinds of approach: one is in hydraulic system, use hydraulic lock (or equilibrium valve); Two is use lock sleeve in oil hydraulic cylinder; Three is adopt bolt mechanism or cushion block fixed piston rod.
For the three class self-locking manner that these are main, there are respective advantage and application area, but due to its principle or structural problem, also there is certain deficiency.To the hydraulic system adopting hydraulic lock self-locking, along with the leakage of cylinder body and hydraulic lock itself, comprise internal leakage and external leakage, make hydraulic cylinder piston rod be difficult to long-time location, easily cause " soft leg " phenomenon.The reliability simultaneously locked is subject to the impact of hydraulic lock element and hydraulic cylinder sealing element quality, cleanliness of hydraulic oil etc.For using hydraulic lock cover in cylinder body, the load forces that its locking method can lock is little, needs high pressure oil to unlock, and once leakage of oil, can not meet long-time, high-precision locking.For adopting the locking mode of bolt mechanism or cushion block fixed piston rod need manually move latch or cushion block, operate relatively loaded down with trivial details.
In view of the using scope of oil hydraulic cylinder is extensive, and the deficiency that existing main hydraulic locking mode exists, when oil hydraulic cylinder is high in the long-time locking of a certain position needs, positioning requirements, Safety performance is good, as Aero-Space occasion, the modes such as hydraulic lock are adopted just to be difficult to meet the demands.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of adjustable type mechanical type self locking hydraulic cylinder, all can realize auto-lock function by the mechanical self-latching structure of self in relevant position, widen the using scope of oil hydraulic cylinder further.
The present invention realizes with following technological scheme: a kind of adjustable type mechanical type self locking hydraulic cylinder, comprise the cylinder barrel of rear and front end opening, one piston matched with inner wall of cylinder is installed in cylinder barrel, piston is installed a piston rod, a front cover is detachably installed in the front end of cylinder barrel, a rear end cover is detachably installed in the rear end of cylinder barrel, and piston rod and front cover are closely slidably matched; Cylinder barrel wall near front cover is provided with filler opening, cylinder barrel wall near rear end cover is provided with oil outlet, central through bore is provided with at the center of piston, in central through bore, a positioning baffle and baffle plate spring are installed, positioning baffle coordinates with central through bore surface sliding, central through bore front inner wall is arranged with groove, in groove, is provided with lock dog, between lock dog and groove bottom, be provided with lock dog spring; Install a locking bar slided along tubular axis in rodless cavity, rear end cover is stretched out in one end of locking bar, and the other end is arranged with draw-in groove up and down, matches with draw-in groove in the bottom of lock dog, is provided with locking device in the joint of locking bar and rear end cover; The oil-feed aperture communicated with groove is arranged with on the piston end wall of rear end cover.
The invention has the beneficial effects as follows: cylinder barrel inside is provided with packaged type locking bar, is fixed by locking bar by locking device, internal piston is provided with lock dog and positioning baffle, when piston movement is to specified position, locking bar compresses positioning baffle, and telescopic lock dog, by being stuck on the draw-in groove of locking bar, realizes self-locking; When piston rod will be regained, lock dog is first pushed back by oil-feed aperture by hydraulic oil, and piston with rod moves, and realizes unlocking function; Positioning baffle spring plays cylinder cushion device effect in the course of the work, vacates and can install cable wire in locking bar, in case of emergency, can be retracted by locking bar by artificial means and unblank.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is locking state schematic diagram of the present invention;
In figure: 1, end cap, 2, filler opening, 3, cylinder barrel, 4, piston, 5, lock dog spring, 6, lock dog, 7, oil outlet, 8, rear end cover, 9, tapered hollow nut, 10, locking bar, 11, cutting ferrule, 12, oil-feed aperture, 13, positioning baffle, 14, baffle plate spring, 15, piston rod.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
As shown in Figure 1, a kind of adjustable type mechanical type self locking hydraulic cylinder has the cylinder barrel 3 of a rear and front end opening, one piston 4 matched with inner wall of cylinder is installed in cylinder barrel 3, piston 4 is installed a piston rod 15, a front cover 1 is detachably installed in the front end of cylinder barrel 3, a rear end cover 8 is detachably installed in the rear end of cylinder barrel 3, and piston rod stretches out cylinder barrel 3 through front cover; Cylinder barrel wall near front cover 1 is provided with filler opening 2, cylinder barrel wall near rear end cover 8 is provided with oil outlet 7, central through bore is provided with at the center of piston 4, in central through bore, a positioning baffle 13 and baffle plate spring 14 are installed, positioning baffle 13 coordinates with central through bore surface sliding, central through bore front inner wall is arranged with groove, in groove, is provided with lock dog 6, between lock dog and groove bottom, be provided with lock dog spring 5; Install a locking bar 10 slided along tubular axis in rodless cavity, rear end cover 8 is stretched out in one end of locking bar 10, and the other end is arranged with draw-in groove up and down, matches with draw-in groove in the bottom of lock dog, is provided with locking device in the joint of locking bar and rear end cover; The oil-feed aperture 12 communicated with groove is arranged with on the piston end wall of rear end cover.
In the present embodiment, lock dog 6 adopts T-shaped lock dog.Locking device comprises tapered hollow nut 9, is provided with cutting ferrule in tapered hollow nut 9; Described tapered hollow nut 9 is threaded with rear end cover; Locking bar 10 and rear end cover 8 are closely slidably connected; Tapered hollow nut 9 and locking bar 10 closely sliding connection, cutting ferrule 11 is stuck on locking bar 10, is tightened locking bar 10 is fixed on relevant position by tapered hollow nut 9.Front cover 1 and rear end cover 8 are all bolted on the front and back ends of cylinder barrel, for convenience detach.
For the present embodiment, its working procedure is specific as follows:
In the process of locking, when filler opening 2 leads to pressure oil, oil outlet 7 leads to oil return, and locking bar 10 in position by cutting ferrule 11 device, is tightened tapered hollow nut 9 and fixed by locking bar 10; Piston 4 is steadily movement left under the effect of pressure oil, when the locking bar 10 in cylinder barrel 3 contacts with the positioning baffle 13 in piston 4, push positioning baffle 13 to right-hand member, when the lock dog 6 in piston 4 crosses the draw-in groove of cylinder barrel 3 inside, T-shaped lock dog is released, under the action of the spring, be stuck on locking bar 10, now piston 4 is locked firmly.At this moment no matter (pressure range T-shaped lock dog bears) applies great power, and because piston 4 is in dead center position, it all will maintain static, thus ensures the reliable fixing and locking of piston, as shown in Figure 2.
In the process of unblanking, oil outlet 7 leads to pressure oil, and filler opening 2 leads to oil return, and pressure oil respectively flows through oil-feed aperture 12 by cylinder barrel 3, because piston 4 is pinned by locking bar 10 during beginning, so piston 4 temporarily maintains static.Continue oil-feed, T-shaped lock dog is under the effect of pressure oil, reach certain pressure, the power overcoming lock dog spring 6 moves inward, and when T-shaped lock dog enters inside completely, piston 4 is just by steadily movement to the right, now, positioning baffle 13 is moved to the left under the effect of baffle plate spring 14, and T-shaped lock dog is limited to home position, the existing unlocking function of historical facts or anecdotes.
Claims (4)
1. an adjustable type mechanical type self locking hydraulic cylinder, comprise the cylinder barrel (3) of rear and front end opening, one piston (4) matched with inner wall of cylinder is installed in cylinder barrel (3), upper installation one piston rod (15) of piston (4), a front cover (1) is detachably installed in the front end of cylinder barrel (3), a rear end cover (8) is detachably installed in the rear end of cylinder barrel (3), piston rod and front cover (1) are closely slidably matched, cylinder barrel wall near front cover (1) is provided with filler opening (2), cylinder barrel wall near rear end cover (8) is provided with oil outlet (7), it is characterized in that: be provided with central through bore at the center of piston (4), in central through bore, a positioning baffle (13) and baffle plate spring (14) are installed, positioning baffle (13) coordinates with central through bore surface sliding, central through bore front inner wall is arranged with groove, lock dog (6) is provided with in groove, lock dog spring (5) is provided with between lock dog (6) and groove bottom, one locking bar (10) slided along tubular axis is installed in rodless cavity, rear end cover (8) is stretched out in one end of locking bar (10), the other end is arranged with draw-in groove up and down, matches with draw-in groove in the bottom of lock dog, is provided with locking device in the joint of locking bar and rear end cover, the oil-feed aperture (12) communicated with groove is arranged with on the piston end wall of rear end cover.
2. adjustable type mechanical type self locking hydraulic cylinder according to claim 1, is characterized in that: described lock dog (6) adopts " T-shaped " lock dog.
3. adjustable type mechanical type self locking hydraulic cylinder according to claim 1, it is characterized in that: described locking device comprises tapered hollow nut (9), tapered hollow nut is provided with cutting ferrule in (9); Described tapered hollow nut (9) is threaded with rear end cover; Locking bar (10) and rear end cover (8) are closely slidably connected; Tapered hollow nut (9) and locking bar (10) closely sliding connection, cutting ferrule (11) is stuck on locking bar (10).
4. the adjustable type mechanical type self locking hydraulic cylinder according to any one of claim 1-3, is characterized in that: described front cover and rear end cover are all bolted on the front and back ends of cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100419.9A CN104675798B (en) | 2015-03-06 | 2015-03-06 | Adjustable type mechanical type self locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100419.9A CN104675798B (en) | 2015-03-06 | 2015-03-06 | Adjustable type mechanical type self locking hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104675798A true CN104675798A (en) | 2015-06-03 |
| CN104675798B CN104675798B (en) | 2016-09-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510100419.9A Expired - Fee Related CN104675798B (en) | 2015-03-06 | 2015-03-06 | Adjustable type mechanical type self locking hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104675798B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757641A (en) * | 2018-08-09 | 2018-11-06 | 浙江巨化装备制造有限公司 | A kind of hydraulic cylinder self locking mechanical mechanism and its self-locking method for cleaning container |
| CN110529459A (en) * | 2019-09-29 | 2019-12-03 | 黄洪刚 | A kind of Quick cylinder |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1310681A2 (en) * | 2001-11-13 | 2003-05-14 | ROLFO S.p.A. | Linear actuator with internal mechanical locking |
| CN1426512A (en) * | 2000-03-24 | 2003-06-25 | 埃天－拉果瓦烟花股份有限公司 | Released control release mechanism in space industry |
| CN101825124A (en) * | 2009-03-06 | 2010-09-08 | 张家港和升数控机床制造有限公司 | Oil cylinder with adjustable stroke |
| CN102042282A (en) * | 2010-12-09 | 2011-05-04 | 西安昆仑工业（集团）有限责任公司 | Buffer locking and positioning device |
| CN204572622U (en) * | 2015-03-06 | 2015-08-19 | 徐州奥博机械科技有限公司 | A kind of adjustable type mechanical type self locking hydraulic cylinder |
-
2015
- 2015-03-06 CN CN201510100419.9A patent/CN104675798B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426512A (en) * | 2000-03-24 | 2003-06-25 | 埃天－拉果瓦烟花股份有限公司 | Released control release mechanism in space industry |
| EP1310681A2 (en) * | 2001-11-13 | 2003-05-14 | ROLFO S.p.A. | Linear actuator with internal mechanical locking |
| CN101825124A (en) * | 2009-03-06 | 2010-09-08 | 张家港和升数控机床制造有限公司 | Oil cylinder with adjustable stroke |
| CN102042282A (en) * | 2010-12-09 | 2011-05-04 | 西安昆仑工业（集团）有限责任公司 | Buffer locking and positioning device |
| CN204572622U (en) * | 2015-03-06 | 2015-08-19 | 徐州奥博机械科技有限公司 | A kind of adjustable type mechanical type self locking hydraulic cylinder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757641A (en) * | 2018-08-09 | 2018-11-06 | 浙江巨化装备制造有限公司 | A kind of hydraulic cylinder self locking mechanical mechanism and its self-locking method for cleaning container |
| CN108757641B (en) * | 2018-08-09 | 2023-08-04 | 浙江巨化装备制造有限公司 | Hydraulic cylinder self-locking mechanical mechanism for cleaning container and self-locking method thereof |
| CN110529459A (en) * | 2019-09-29 | 2019-12-03 | 黄洪刚 | A kind of Quick cylinder |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104675798B (en) | 2016-09-21 |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20210306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |