CN105650055B - A kind of hydraulic cylinder with double piston rods - Google Patents
A kind of hydraulic cylinder with double piston rods Download PDFInfo
- Publication number
- CN105650055B CN105650055B CN201610193644.6A CN201610193644A CN105650055B CN 105650055 B CN105650055 B CN 105650055B CN 201610193644 A CN201610193644 A CN 201610193644A CN 105650055 B CN105650055 B CN 105650055B
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- CN
- China
- Prior art keywords
- buffering
- cylinder
- piston
- cylinder body
- fairlead
- 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.)
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Classifications
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- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- 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
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder, buffering cylinder body, piston rod, cushion collar, fairlead, check valve, spring and sealing ring；At piston/cylinder two ends, each fixed connection one buffers cylinder body；Piston rod is arranged in piston/cylinder, and piston rod two ends are stretched out after buffered cylinder body respectively, and a buffering ring is provided with the piston rod in piston/cylinder, and a sealing ring is provided with buffering ring, and sealed groove is provided with sealing ring, and sealing ring is provided with sealed groove；Cushion collar and fairlead are set with from inside to outside on piston rod in cylinder body is buffered；Spring housing is filled on the piston rod, and a check valve is provided with so that fluid can only flow to buffer groove from oil guiding hole in excessively oily passage I.The present invention has the advantages that buffering effect, easy to maintenance and long service life can be improved.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder, particularly with regard to a kind of hydraulic cylinder with double piston rods.
Background technology
At present on hydraulic test, the particularly hydraulic test of high-speed high-power, the speed of service of hydraulic cylinder is very high.In order to
Avoid producing strong shock and vibration, it is ensured that system smooth working, prevent drive disk assembly from damaging, improve the work of hydraulic system
Performance and life-span, it is necessary to terminate advance row buffering in hydraulic cylinder travel.At present, way to play for time has two kinds substantially：One kind is hydraulic pressure
Cylinder external control, its structure is more complicated；One kind is hydraulic cylinder indoor design buffering, its simple structure, compact, thus is obtained extensively
Application.In existing technology, hydraulic cylinder uses gap throttling buffering technology mostly, i.e., by between buffer plunger and cushion hole
Gap coordinate sealed and throttled so that realize buffering.But the deficiency of this buffer structure has：1. require buffer plunger and
There is high axiality and minimum fit clearance, so as to cause machining accuracy higher, and between its cooperation between cushion hole
Gap and passage section directly influence the buffering effect of oil cylinder；2. in the occasion that frequency of use is higher, buffer plunger and cushion hole
Easily wear out failure；3. the repairing of buffer structure is difficult in maintenance.
The content of the invention
For above-mentioned shortcoming, buffering effect, easy to maintenance and use can be improved it is an object of the invention to provide one kind
The hydraulic cylinder with double piston rods of long lifespan.
Technology contents of the invention are, a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder, cushion dashpot
Body, piston rod, cushion collar, fairlead, check valve, spring and sealing ring；In one cushion dashpot of each fixed connection in piston/cylinder two ends
Body；Piston rod is arranged in piston/cylinder, and piston rod two ends are stretched out after buffered cylinder body respectively, the piston rod in piston/cylinder
A buffering ring is provided with, a sealing ring is provided with buffering ring, sealed groove is provided with sealing ring, be provided with sealed groove
Sealing ring；Cushion collar and fairlead are set with from inside to outside on piston rod in cylinder body is buffered, between cushion collar and piston rod
It is formed with one and crosses oil ring hole；A cushion collar shrinkage pool, the guiding corresponding with cushion collar shrinkage pool are provided with the medial surface of cushion collar
Set medial surface is provided with a fairlead shrinkage pool, and spring housing dress on the piston rod and is in cushion collar shrinkage pool and fairlead shrinkage pool,
Some valley gutters are provided with the outside of cushion collar medial surface, a water conservancy diversion is provided with the outside of the fairlead medial surface corresponding with valley gutter
Groove, is communicated with the fairlead through hole of fairlead shrinkage pool and diversion groove on fairlead medial surface；It is corresponding with valley gutter
Buffering inboard wall of cylinder block is provided with a loop buffer groove, and be provided with oil guiding hole on buffering cylinder body communicates with buffer groove, in oil guiding hole
Buffering cylinder body and the diversion groove of fairlead between is provided with an excessively oily passage I, and being provided with a check valve in excessively oily passage I makes
Obtaining fluid can only flow to buffer groove from oil guiding hole；An excessively oily passage II is provided with buffering cylinder body, excessively oily passage II is used for will
The inner space of the buffering cylinder body of oil guiding hole and buffering cylinder body and piston/cylinder junction.
In above-mentioned hydraulic cylinder with double piston rods, the outside diameter of the outside diameter more than buffering ring of cushion collar, buffering ring
Outside diameter was more than the outside diameter in oil ring hole.
To improve buffering effect, scalene cone is set on the outside of cushion collar lateral surface.
The present invention has the advantage that as between the present invention is because piston rod and cushion collar leave annular compared with prior art
Gap, influence of the accumulated error for eliminate welding, being assembled to form to buffering effect, buffering effect is not welded and assembled substantially
The influence of factor, it is to avoid because clearance control is inaccurate and caused by cushion collar and cushion chamber it is stuck, pull；Structure letter of the present invention
Single, compact, the axiality problem without considering cushion collar and piston rod, buffer gap quality of fit is high, and processing technology is simple, delays
Rush effect good, long service life is repaired easy to maintenance.
Brief description of the drawings
Fig. 1 is the structural representation of invention.
Fig. 2 is present invention buffering initial state schematic diagram.
Fig. 3 is present invention buffering done state schematic diagram.
Specific embodiment
As shown in figure 1, a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder 1, buffering cylinder body 2, piston
Bar 3, cushion collar 4, fairlead 5, check valve 6, spring 7 and sealing ring 8；In one cushion dashpot of each fixed connection in the two ends of piston/cylinder 1
Body 2；Piston rod 3 is arranged in piston/cylinder 1, and the two ends of piston rod 3 are stretched out after buffered cylinder body 2 respectively, in piston/cylinder 1
Piston rod 3 is provided with a buffering ring 3.1, and a sealing ring 3.1.1 is provided with buffering ring 3.1, is provided with close on sealing ring 3.1.1
Envelope groove 3.1.2, is provided with sealing ring 8 in sealed groove 3.1.2；It is set with from inside to outside on piston rod 3 in cylinder body 2 is buffered
There are cushion collar 4 and fairlead 5, one is formed between cushion collar 4 and piston rod 3 and crosses oil ring hole 4.1, in fairlead 5 and piston rod 3
Between be provided with sealing ring 8；The diameter with diameter greater than buffering ring 3.1 of cushion collar 4, buffering ring 3.1 with diameter greater than crossing oil ring hole
4.1 diameter；A cushion collar shrinkage pool 4.2, the fairlead 5 corresponding with cushion collar shrinkage pool are provided with the medial surface of cushion collar 4
Medial surface is provided with a fairlead shrinkage pool 5.1, and spring 7 is sleeved on piston rod 3 and to be in cushion collar shrinkage pool 4.2 recessed with fairlead
In hole 5.1, some valley gutters 4.3 are provided with the outside of the medial surface of cushion collar 4, fairlead 5 medial surface corresponding with valley gutter 4.3
Outside be provided with a diversion groove 5.2, leading for fairlead shrinkage pool 5.1 and diversion groove 5.2 is communicated with the medial surface of fairlead 5
To set through hole 5.3；Buffering cylinder body 2 inwall corresponding with valley gutter 4.3 is provided with a loop buffer groove 2.1, in buffering cylinder body 2
It is provided with oil guiding hole 2.2 to be communicated with buffer groove 2.1, the buffering between the diversion groove 5.2 of oil guiding hole 2.2 and fairlead 5
Cylinder body 2 is provided with an excessively oily passage I 2.3, and a check valve 6 is provided with so that fluid can only be from oil guiding hole in excessively oily passage I 2.3
2.2 flow to buffer groove 5.2；An excessively oily passage II 2.4 is provided with buffering cylinder body 2, excessively oily passage II 2.4 is used for oil guiding hole
2.2 and buffering cylinder body 2 and the junction of piston/cylinder 1 buffering cylinder body 2 inner space；Set on the outside of the lateral surface of cushion collar 2
It is scalene cone.
Operation principle of the invention is to be divided into A chambers and B chambers by sealing ring 3.1.1 in the piston/cylinder 1 in the present invention,
It is left and right two that piston rod 3 is buffered 3.1 points of ring, living when fuel feeding during the oil guiding hole 2.2 of the buffering cylinder body 2 from left side is to A chambers
In buffering initial state when stopper rod 3 moves right and buffering ring 3.1 is contacted with cushion collar 4, as shown in Fig. 2 now buffering
The contact with cushion collar 4 of ring 3.1 end face is in sealing surface, while sealed crossing oil ring hole 4.1, the fluid in B chambers is buffered with right side
Fluid in cylinder body 2 is separated；Piston rod 3 continues move right and make the extrusion cushion collar 4 of buffering ring 3.1, right side buffering cylinder body 2
C chambers in fluid enter oil guiding hole 2.2 through valley gutter 4.3 and loop buffer groove 2.1, a portion fluid is excluded,
A part of fluid is flowed into B chambers by oily passage II 2.4；As piston rod 3 moves right, orifice size is gradually reduced, and returns
Oily resistance gradually increases, until piston rod 3 stops, as shown in Figure 3；When 2.2 oiling of oil guiding hole of buffering cylinder body 2 to the right,
A part of fluid flows into B chambers and promotes piston rod 3 to be moved to the left through oily passage II 2.4, and now buffering ring 3.1 is in cushion collar 4
The contact end face of sealing is separated；A part of fluid is flowed into by oily passage I 2.3, check valve 6 and fairlead shrinkage pool 5.1 simultaneously
In the C chambers of right side buffering cylinder body 2, then through fairlead through hole 5.3 flow into fairlead shrinkage pool 5.1, now cushion collar 4 is in spring 7
In the presence of be moved to the left until reaching the junction of right side buffering cylinder body 2 and piston/cylinder 1, the machinery of piston rod 3 is moved to the left
Thus the buffer-process of left side buffering cylinder body 2 is carried out.
Claims (3)
1. a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder, buffering cylinder body, piston rod, cushion collar, guiding
Set, check valve, spring and sealing ring；At piston/cylinder two ends, each fixed connection one buffers cylinder body；Piston rod is arranged on piston cylinder
In body, piston rod two ends are stretched out after buffered cylinder body respectively, and a buffering ring is provided with the piston rod in piston/cylinder, in buffering
Ring is provided with a sealing ring, and sealed groove is provided with sealing ring, and sealing ring is provided with sealed groove；In cylinder body is buffered
Cushion collar and fairlead are set with piston rod from inside to outside, one are formed between cushion collar and piston rod and are crossed oil ring hole；Slow
The medial surface for rushing set is provided with a cushion collar shrinkage pool, and the fairlead medial surface corresponding with cushion collar shrinkage pool is provided with a fairlead
Shrinkage pool, spring housing dress on the piston rod and is in cushion collar shrinkage pool and fairlead shrinkage pool, is provided with the outside of cushion collar medial surface
Some valley gutters, are provided with a diversion groove on the outside of the fairlead medial surface corresponding with valley gutter, set on fairlead medial surface
There is the fairlead through hole of connection fairlead shrinkage pool and diversion groove；The buffering inboard wall of cylinder block corresponding with valley gutter is provided with an annular
Buffer groove, is provided with oil guiding hole and is communicated with buffer groove, between oil guiding hole and the diversion groove of fairlead on buffering cylinder body
Buffering cylinder body be provided with an excessively oily passage I, be provided with a check valve so that fluid can only be flowed to from oil guiding hole in excessively oily passage I
Buffer groove；An excessively oily passage II is provided with buffering cylinder body, excessively oily passage II is used for oil guiding hole and buffering cylinder body and piston
The inner space of the buffering cylinder body of cylinder body junction.
2. hydraulic cylinder with double piston rods according to claim 1, it is characterised in that the outside diameter of cushion collar is more than buffering ring
Outside diameter, the outside diameter of buffering ring was more than the outside diameter in oil ring hole.
3. hydraulic cylinder with double piston rods according to claim 1, it is characterised in that be set on the outside of cushion collar lateral surface tiltedly
The conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193644.6A CN105650055B (en) | 2016-03-31 | 2016-03-31 | A kind of hydraulic cylinder with double piston rods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193644.6A CN105650055B (en) | 2016-03-31 | 2016-03-31 | A kind of hydraulic cylinder with double piston rods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105650055A CN105650055A (en) | 2016-06-08 |
| CN105650055B true CN105650055B (en) | 2017-05-31 |
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ID=56496696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610193644.6A Active CN105650055B (en) | 2016-03-31 | 2016-03-31 | A kind of hydraulic cylinder with double piston rods |
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| Country | Link |
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| CN (1) | CN105650055B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299922A (en) * | 2017-08-03 | 2017-10-27 | 安徽科海压缩机制造有限公司 | A kind of buffering hydraulic cylinder |
| CN107816469A (en) * | 2017-12-04 | 2018-03-20 | 合肥工业大学 | A kind of dither servo hydraulic cylinder |
| CN110566537B (en) * | 2019-09-12 | 2021-02-19 | 山西华坤机械有限公司 | Hydraulic cylinder spring holder delay device |
| CN113513465B (en) * | 2021-04-08 | 2022-07-12 | 西安交通大学 | Oil cylinder side buffering structure of liquid-driven piston compressor and liquid-driven piston compressor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3442179A (en) * | 1967-10-18 | 1969-05-06 | Astrosystems Int Inc | Double-acting explosive actuator |
| GB2123922A (en) * | 1982-06-15 | 1984-02-08 | Tokico Ltd | Hydraulic damper with adjustable flow path |
| DE4314690C2 (en) * | 1993-05-04 | 1997-07-24 | Hydraulik Nord Gmbh | Hydraulic cylinder with end position brake valve |
| CN2772796Y (en) * | 2005-03-30 | 2006-04-19 | 佛山伊之密精密机械有限公司 | High-efficient and energy-saving closed-loop injection machine with servo-adjustment |
| CN102032236A (en) * | 2011-01-17 | 2011-04-27 | 江阴市洪腾机械有限公司 | Hydraulic cylinder of double piston rods |
| CN102493969B (en) * | 2011-12-19 | 2014-10-08 | 宁波千普机械制造有限公司 | Hydraulic cylinder with double piston rods |
| CN204664054U (en) * | 2015-04-02 | 2015-09-23 | 中船重工中南装备有限责任公司 | The powerful mechanical self-locking hydraulic cylinder of band buffering |
| CN205446259U (en) * | 2016-03-31 | 2016-08-10 | 江阴市洪腾机械有限公司 | Hydraulic cylinder of double piston rods |
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2016
- 2016-03-31 CN CN201610193644.6A patent/CN105650055B/en active Active
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| CN105650055A (en) | 2016-06-08 |
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