CN109026901A - Three-level cushion cylinder - Google Patents
Three-level cushion cylinder Download PDFInfo
- Publication number
- CN109026901A CN109026901A CN201811035892.3A CN201811035892A CN109026901A CN 109026901 A CN109026901 A CN 109026901A CN 201811035892 A CN201811035892 A CN 201811035892A CN 109026901 A CN109026901 A CN 109026901A
- Authority
- CN
- China
- Prior art keywords
- level
- buffering
- sleeve
- bar bottom
- piston rod
- 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.)
- Pending
Links
- 230000003139 buffering effect Effects 0.000 claims abstract description 79
- 239000000872 buffer Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 10
- 230000004044 response Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 19
- 239000010720 hydraulic oil Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
-
- 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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
-
- 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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/224—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston which closes off fluid outlets in the cylinder bore by its own movement
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of three-level cushion cylinders, it is by adding first-level buffer sleeve and level 2 buffering sleeve, the sliding of first-level buffer sleeve is placed in level 2 buffering sleeve, first-level buffer barrel forward end is equipped with primary seal ring, and radial level-one through-hole is equipped in the first-level buffer sleeve at primary seal ring rear；Level 2 buffering barrel forward end is equipped with second-level sealing ring, second-level sealing ring and primary seal ring between level 2 buffering sleeve in be equipped with radial secondary through holes；Three-level bar bottom is fixedly connected in three-level piston rod rear end, and the inner cavity at second level bar bottom and three-level bar bottom is communicated with the exocoel of level 2 buffering sleeve；It is equipped at least one annular groove and stop nut in the rear end of level 2 buffering sleeve, second level bar bottom and three-level bar bottom are equal, is equipped with buffering ring in annular groove；The present invention can be achieved to throttle twice, have the advantages that the response time of buffering is short, work efficiency is high, and structure is relatively simple, at low cost.
Description
Technical field
The present invention relates to a kind of three-level cushion cylinders.
Background technique
Cushion cylinder is used for more demanding operating condition, such as needs that piston rod is avoided to generate vibration in the stroke for stretching out and withdrawing
It is dynamic；One is the flows using electrical component control hydraulic oil for existing cushion cylinder, and to realize buffering, but the structure needs frequently
Oil circuit is replaced, increases the complexity and cost of hydraulic system, and the response time is longer, the period of oil cylinder one action is long, work
Make low efficiency；Another mechanical buffer structure, is now only used for relatively simple single stage oil cylinder, is not used to complicated three-level
Oil cylinder.
Summary of the invention
The purpose of the present invention is In view of the above shortcomings of the prior art, providing a kind of three-level cushion cylinder, it has
The advantages of response time of buffering is short, work efficiency is high, and structure is relatively simple, at low cost.
In order to achieve the above objectives, three-level cushion cylinder of the invention, including outer cylinder, cylinder bottom, it is equipped with inner hole and by outer
To interior level-one, second level and the three-level piston rod, guide sleeve set gradually, the rear end of piston rods at different levels is equipped with piston, in three-level
The front end of piston rod is fixedly connected with head, the rodless cavity hydraulic fluid port that rod chamber hydraulic fluid port built in head is communicated with its inner hole, level-one, second level and
Three-level piston rod is equipped with radial rod chamber oil circuit, and the rod chamber oil circuit of three-level piston rod is communicated with rod chamber hydraulic fluid port, special
It levies and is to be fixedly connected with first-level buffer sleeve in cylinder bottom, be fixedly connected with level-one bar bottom in first stage piston rod rear end, level-one bar bottom is fixedly connected with
Level 2 buffering sleeve is fixedly connected with second level bar bottom in second piston rod rear end, and the sliding of first-level buffer sleeve is placed in level 2 buffering set
In cylinder, first-level buffer barrel forward end is equipped with primary seal ring, is equipped in the first-level buffer sleeve at primary seal ring rear radial
Level-one through-hole；The sliding of level 2 buffering sleeve is placed in second level bar bottom and three-level piston rod, and level 2 buffering barrel forward end is equipped with
Second-level sealing ring, second-level sealing ring and primary seal ring between level 2 buffering sleeve in be equipped with radial secondary through holes；
Three-level bar bottom is fixedly connected in three-level piston rod rear end, exocoel of the inner cavity at second level bar bottom and three-level bar bottom with level 2 buffering sleeve
It communicates；Sleeve is fixedly connected with outside three-level piston rod, sleeve sliding passes through guide sleeve, and sleeve is equipped with radial rod chamber oil circuit；
The rear end of level 2 buffering sleeve, second level bar bottom and three-level bar bottom in be equipped at least one annular groove and stop nut, in annular groove
It is equipped with buffering ring；Buffering ring is with the part on the inside of it radial in gap setting.
When work, due between first-level buffer sleeve, level 2 buffering sleeve and three-level piston rod between being radially successively
Gap setting, forms throttling channel between any two, in addition the rear end of level 2 buffering sleeve, second level bar bottom and three-level bar bottom interior be equipped with are delayed
Ring is rushed, restrictor ring is formed, when piston rods at different levels stretch out or withdraw, realizes in throttling channel and in restrictor ring and throttles twice, arrive
Up to buffering effect, without controlling the flow of hydraulic oil, buffering reaction in time, has that the response time of buffering is short, working efficiency
High advantage, only increases component in outer cylinder, and structure is relatively simple, at low cost；
As a further improvement of the present invention, the width of the annular groove is all larger than the width of its interior buffering ring；Buffering ring when buffering
It can move axially, realize the smooth transition of buffering, guarantee the mobile stationarity of piston rod；
As a further improvement of the present invention, it is set in second level bar bottom there are two annular groove and stop nut, is equipped with buffering in annular groove
Ring, the width of annular groove are all larger than the width of its interior buffering ring, the inner periphery of two buffering rings and annular groove it is radial be in gap setting,
Wherein the front side wall positioned at the buffering ring in front is equipped with flow-conveying groove, and the rear wall for the buffering ring being located behind is equipped with flow-conveying groove；Such as
This, the buffering ring at rear works when piston rod stretches out, and the buffering ring in front works when piston rod is withdrawn, second piston
Bar can not only realize buffering, but also can keep reasonably stretching out or withdrawing speed；
As a further improvement of the present invention, the rod chamber oil circuit of first stage piston bar, second piston rod and sleeve is set to neighbouring
The rear end of respective piston；Piston rods at different levels can control successively to withdraw from the inside to the outside；
In conclusion the present invention has the advantages that the response time of buffering is short, work efficiency is high, and structure is relatively simple, cost
It is low.
Detailed description of the invention
Fig. 1 is the main view of the embodiment of the present invention.
Fig. 2 is enlarged drawing at the A of Fig. 1.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in Figure 1 and Figure 2, the three-level cushion cylinder of the embodiment, including outer cylinder 1, cylinder bottom 2, be equipped with inner hole and by
Outer first stage piston bar 3, second piston rod 4 and three-level piston rod 5, the guide sleeve 6 set gradually in, piston rods 3 to 5 at different levels
Rear end is equipped with piston, is fixedly connected with head 7 by screw thread and holding screw in the front end of three-level piston rod 5, has in head 7
The rodless cavity hydraulic fluid port 9 that rod cavity hydraulic fluid port 8 is communicated with its inner hole, first stage piston bar 3, second piston rod 4 and three-level piston rod 5 are equipped with
Radial rod chamber oil circuit 10 or 11 or 12, the rod chamber oil circuit 12 of three-level piston rod 5 is communicated with rod chamber hydraulic fluid port 8, in cylinder bottom 2
Welding is fixedly connected with first-level buffer sleeve 14, is fixedly connected with level-one bar bottom 15, level-one by screw thread and retaining ring in 3 rear end of first stage piston bar
Bar bottom 15 is fixedly connected with level 2 buffering sleeve 16 by screw thread, is fixedly connected with second level bar bottom 17, first-level buffer in 4 rear end of second piston rod
What sleeve 14 slided is placed in level 2 buffering sleeve 16, and 14 front end of first-level buffer sleeve is equipped with primary seal ring 18, close in level-one
Several radial level-one through-holes 19 are equipped in the first-level buffer sleeve 14 at 18 rear of seal ring；What level 2 buffering sleeve 16 slided is placed in
In second level bar bottom 17 and three-level piston rod 5,16 front end of level 2 buffering sleeve be equipped with second-level sealing ring 20, second-level sealing ring 20 with
Primary seal ring 18 between level 2 buffering sleeve 16 in be equipped with several radial secondary through holes 21；After three-level piston rod 5
It holds and is fixedly connected with three-level bar bottom 22, the inner cavity at second level bar bottom 17 and three-level bar bottom 22 is communicated with the exocoel of level 2 buffering sleeve 16；
Sleeve 23 is fixedly connected with by nut 24 and holding screw 25 outside three-level piston rod 5, what sleeve 23 slided passes through guide sleeve 6, set
Cylinder 23 is equipped with radial rod chamber oil circuits 13, the rod chamber oil circuit of the rod chamber oil circuit 10 of first stage piston bar 3, second piston rod 4
11 and the rod chamber oil circuit 13 of sleeve 23 be set to the rear end of neighbouring respective piston；One is equipped in the rear end of level 2 buffering sleeve 16
A annular groove and stop nut 26, annular groove is interior to be equipped with buffering ring 27, interior equipped with an annular groove and stop nut at three-level bar bottom 22
28, annular groove is interior to be equipped with buffering ring 29, and the width of annular groove is all larger than the width of its interior buffering ring 27 or 29；Along axis in second level bar bottom 17
To setting there are two annular groove and two stop nuts 30,31, it is equipped with buffering ring 32 or 33 in annular groove, the width of annular groove is all larger than in it
The inner periphery of the width of buffering ring 32 or 33, two buffering rings 32,33 and annular groove is in gap setting in radial direction, wherein being located at front
The front side wall of buffering ring 32 be equipped with flow-conveying groove 34, the rear wall of the buffering ring 33 being located behind is equipped with flow-conveying groove 35；Each buffering
Ring 27,29,32,33 is with the part on the inside of it radial in gap setting；
When work, hydraulic oil is passed through by rodless cavity hydraulic fluid port 9, is respectively acting on level-one bar through level-one through-hole 19 and secondary through holes 21
22 rear end of bottom 15, second level bar bottom 17 and three-level bar bottom, since the compression area of three is sequentially reduced, corresponding piston rods at different levels by
It is outer successively to be stretched out to interior；It is passed through hydraulic oil by rod chamber hydraulic fluid port 8, due to rod chamber oil circuit 10, rod chamber oil circuit 11 and has bar
Chamber oil circuit 13 is set to the rear end of neighbouring respective piston, and after the piston rod of inside is withdrawn, hydraulic oil just can enter having on the outside of it
Rod cavity oil circuit so that piston rod at different levels is successively withdrawn from the inside to the outside, when withdrawal without specially designing each piston hydraulic oil by
Pressure surface product, can the structure that successively withdraws of simplified control piston rod；In above process, since first-level buffer sleeve 14, second level are slow
Rushing between sleeve 16 and three-level piston rod 5 is successively being radially gap setting, throttling channel is formed between any two, in addition second level is slow
The rear end, second level bar bottom 17 and three-level bar bottom 22 for rushing sleeve 16 are interior equipped with buffering ring, form restrictor ring, stretch in piston rods at different levels
It when out or withdrawing, realizes in throttling channel and in restrictor ring and throttles twice, buffering effect is reached, without controlling the stream of hydraulic oil
Amount, buffering reaction in time, have the advantages that the response time of buffering is short, work efficiency is high, only the increased portion in outer cylinder 1
Part, structure are relatively simple, at low cost；Especially for two buffering rings 32,33 in second level bar bottom 17, the buffering ring 33 at rear
It being pushed forward when piston rod 4 stretches out, the end face of annular groove is close in front end, and hydraulic oil only passes through from its inner hole, throttling action is played, and
The buffering ring 32 in front is equipped with flow-conveying groove 34 due to front side wall at this time, and the hydraulic oil runner in inner hole and outside is unchanged, no section
Flow effect；Similarly, throttling action from the buffering ring 32 in front is when piston rod 4 is withdrawn, the second piston rod 4 as intergrade was both
Buffering can be achieved, and can keep reasonably stretching out or withdrawing speed, conducive to the working condition for improving oil cylinder；
The width of each annular groove is all larger than the width of its interior buffering ring, and buffering ring can move axially, and realizes the steady mistake of buffering
It crosses, guarantees the mobile stationarity of piston rods at different levels.
Claims (4)
1. a kind of three-level cushion cylinder, including outer cylinder, cylinder bottom, the level-one for being equipped with inner hole and setting gradually from outside to inside, two
Grade and three-level piston rod, guide sleeve, the rear end of piston rods at different levels is equipped with piston, is fixedly connected with bar in the front end of three-level piston rod
Head, the interior rodless cavity hydraulic fluid port communicated equipped with rod chamber hydraulic fluid port with its inner hole of head, level-one, second level and three-level piston rod are equipped with diameter
To rod chamber oil circuit, it is characterised in that be fixedly connected with first-level buffer sleeve in cylinder bottom, be fixedly connected with level-one in first stage piston rod rear end
Bar bottom, level-one bar bottom are fixedly connected with level 2 buffering sleeve, are fixedly connected with second level bar bottom in second piston rod rear end, first-level buffer sleeve is sliding
Dynamic is placed in level 2 buffering sleeve, and first-level buffer barrel forward end is equipped with primary seal ring, the level-one at primary seal ring rear
It buffers and is equipped with radial level-one through-hole in sleeve；The sliding of level 2 buffering sleeve is placed in second level bar bottom and three-level piston rod, and two
Grade buffering barrel forward end be equipped with second-level sealing ring, second-level sealing ring and primary seal ring between level 2 buffering sleeve in set
There are radial secondary through holes；Be fixedly connected with three-level bar bottom in three-level piston rod rear end, the inner cavity at second level bar bottom and three-level bar bottom with
The exocoel of level 2 buffering sleeve communicates；Sleeve is fixedly connected with outside three-level piston rod, sleeve sliding passes through guide sleeve, and sleeve is equipped with
Radial rod chamber oil circuit；It is interior equipped at least one annular groove at the rear end of level 2 buffering sleeve, second level bar bottom and three-level bar bottom
And stop nut, buffering ring is equipped in annular groove.
2. three-level cushion cylinder as described in claim 1, it is characterised in that the width of the annular groove is all larger than its interior buffering ring
Width.
3. three-level cushion cylinder as claimed in claim 1 or 2, it is characterised in that annular groove and limit there are two being set in second level bar bottom
Nut is equipped with buffering ring in annular groove, and the width of annular groove is all larger than the width of its interior buffering ring, the inner circle of two buffering rings and annular groove
Week is in gap setting in radial direction, wherein the front side wall for being located at the buffering ring in front is equipped with flow-conveying groove, the buffering ring being located behind
Rear wall be equipped with flow-conveying groove.
4. three-level cushion cylinder as claimed in claim 1 or 2, it is characterised in that first stage piston bar, second piston rod and sleeve
Rod chamber oil circuit be set to the rear end of neighbouring respective piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811035892.3A CN109026901A (en) | 2018-09-06 | 2018-09-06 | Three-level cushion cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811035892.3A CN109026901A (en) | 2018-09-06 | 2018-09-06 | Three-level cushion cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026901A true CN109026901A (en) | 2018-12-18 |
Family
ID=64624297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811035892.3A Pending CN109026901A (en) | 2018-09-06 | 2018-09-06 | Three-level cushion cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263653A (en) * | 2021-12-27 | 2022-04-01 | 青岛威特动力木业机械有限公司 | Multi-section air cylinder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336390B1 (en) * | 1999-10-01 | 2002-01-08 | Smc Corporation | Linear actuator with air cushion mechanism |
| EP1652811A1 (en) * | 2004-10-27 | 2006-05-03 | H.S. PENTA S.r.l. | Multistage telescopic cylinder for moving loads |
| CN102562709A (en) * | 2011-12-30 | 2012-07-11 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN202833410U (en) * | 2012-08-15 | 2013-03-27 | 江苏昌力油缸有限公司 | Multi-stage hydro-cylinder with buffering function |
| CN103671348A (en) * | 2013-12-17 | 2014-03-26 | 湘电重型装备有限公司 | Lifting hydraulic oil cylinder of mining dump truck |
| CN105257621A (en) * | 2015-10-14 | 2016-01-20 | 航天重型工程装备有限公司 | Multi-stage lifting cylinder with hydraulic buffer function |
| CN206309693U (en) * | 2016-12-23 | 2017-07-07 | 湖北佳恒科技有限公司 | A kind of multilevel sleeve type double acting hydraulic cylinder |
| CN208764032U (en) * | 2018-09-06 | 2019-04-19 | 泸州市巨力液压有限公司 | Three-level cushion cylinder |
-
2018
- 2018-09-06 CN CN201811035892.3A patent/CN109026901A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336390B1 (en) * | 1999-10-01 | 2002-01-08 | Smc Corporation | Linear actuator with air cushion mechanism |
| EP1652811A1 (en) * | 2004-10-27 | 2006-05-03 | H.S. PENTA S.r.l. | Multistage telescopic cylinder for moving loads |
| CN102562709A (en) * | 2011-12-30 | 2012-07-11 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN202833410U (en) * | 2012-08-15 | 2013-03-27 | 江苏昌力油缸有限公司 | Multi-stage hydro-cylinder with buffering function |
| CN103671348A (en) * | 2013-12-17 | 2014-03-26 | 湘电重型装备有限公司 | Lifting hydraulic oil cylinder of mining dump truck |
| CN105257621A (en) * | 2015-10-14 | 2016-01-20 | 航天重型工程装备有限公司 | Multi-stage lifting cylinder with hydraulic buffer function |
| CN206309693U (en) * | 2016-12-23 | 2017-07-07 | 湖北佳恒科技有限公司 | A kind of multilevel sleeve type double acting hydraulic cylinder |
| CN208764032U (en) * | 2018-09-06 | 2019-04-19 | 泸州市巨力液压有限公司 | Three-level cushion cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263653A (en) * | 2021-12-27 | 2022-04-01 | 青岛威特动力木业机械有限公司 | Multi-section air cylinder |
| CN114263653B (en) * | 2021-12-27 | 2024-02-23 | 青岛威特锐智能装备有限公司 | Multistage cylinder |
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