CN107806457A - A kind of pressure release buffering hydraulic cylinder - Google Patents
A kind of pressure release buffering hydraulic cylinder Download PDFInfo
- Publication number
- CN107806457A CN107806457A CN201610808921.XA CN201610808921A CN107806457A CN 107806457 A CN107806457 A CN 107806457A CN 201610808921 A CN201610808921 A CN 201610808921A CN 107806457 A CN107806457 A CN 107806457A
- Authority
- CN
- China
- Prior art keywords
- piston
- pressure release
- hydraulic cylinder
- valve
- valve seat
- 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 title claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 14
- 238000010009 beating Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 239000006173 Good's buffer Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 239000000872 buffer Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
-
- 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
- F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
-
- 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
-
- 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
- F15B15/202—Externally-operated valves mounted in or on the actuator
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A kind of pressure release buffering hydraulic cylinder, including cylinder body, cylinder bottom, piston rod, piston, piston are provided with drain path, the control valve for beating opening/closing drain path；The control valve includes two valve seat, the valve rods for being loaded on drain path both ends respectively；It is pilot hole in the middle part of the valve seat, valve seat outer wall is provided with the oil guide groove that is connected with pilot hole；The valve rod includes coordinating the thin portion of assembling, the thick portion positioned at centre positioned at both ends and pilot hole, is connected between the thin portion and thick portion of the valve rod for the transition part with valve seat medial end fitted seal.Compared with prior art, the present invention is not only convenient for processing, and good buffer effect, and use reliability is strong, simple in construction, and buffering is reliable.
Description
Technical field
The present invention relates to a kind of pressure release buffering hydraulic cylinder.
Background technology
At present, the structure of hydraulic cylinder buffering is usually to be flowed using the gap of hydraulic oil, by the flow for reducing hydraulic oil
To make piston rod produce buffering, common structure type is by piston both ends buffering ring and oil cylinder both ends（Cylinder bottom and cylinder cap）It is recessed
Groove gap, which coordinates, produces gap flowing, although this structure type structural principle is simple, in actual processing, is added due to various
Work and rigging error, it is difficult to accomplish before and after piston rod afterbody center line and oil cylinder fit center line axiality 0.1mm with
It is interior, so as to be not easy to ensure buffering effect.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art, and a kind of pressure release buffering hydraulic cylinder is provided, not only
It is easy to process, and buffering effect is good, and use reliability is strong.
The technical scheme is that：Including cylinder body, cylinder bottom, piston rod, piston, piston is provided with drain path, is used for
Beat the control valve of opening/closing drain path；The control valve includes two valve seat, the valve rods for being loaded on drain path both ends respectively；
It is pilot hole in the middle part of the valve seat, valve seat outer wall is provided with the oil guide groove that is connected with pilot hole；The valve rod includes being located at both ends
Coordinate the thin portion of assembling, the thick portion positioned at centre with pilot hole, be connected with and be used for and valve between the thin portion and thick portion of the valve rod
The transition part of seat medial end fitted seal.
It is interference fit between the valve seat and drain path, matches somebody with somebody between the thick portion and drain path of the valve rod for gap
Close to form draining gap.
The valve seat outboard end is provided with baffle plate.
The piston rod is stepped cylinder, including big cylindrical portion, middle cylindrical portion, small column portion, during piston bush is loaded on
Cylindrical portion, small column portion are equipped with locking nut.
Holding screw is housed on the locking nut.
The baffle plate, which is sold, to be positioned at left and right sides of piston, and baffle plate is butted on big cylindrical portion, piston right-hand apron on the left of piston
It is butted on locking nut.
The resigning hole for being easy to valve rod to stretch out is provided with the baffle plate.
The transition part outer surface of the valve rod is sealing curved surface, and the sealing curved surface is truncated cone-shaped curved surface, truncated cone-shaped curved surface
Transition cambered surface is provided with small end face, transition cambered surface radius is R, and 3mm≤R≤5mm, the corner angle of truncated cone-shaped curved surface is A,
65°≤A≤75°。
The thick portion of the valve rod and two transition parts are in Spindle shape.
It is interference fit between valve seat outer surface and drain path inwall, is between valve seat interior surface and stem guiding position
Gap coordinates, and has draining gap between valve rod circle tympanic part position and drain path.Compared with prior art, the present invention has convenient add
Work, it is easily installed, the advantages of buffering effect is reliable.
Brief description of the drawings
Fig. 1 is one of structural representation of the present invention（Piston rod is run to centre position）.
Fig. 2 is the two of the structural representation of the present invention（Piston rod is run to cylinder bottom position）.
Fig. 3 is the three of the structural representation of the present invention（Piston rod is run to cylinder cap position）.
Fig. 4 is the structural representation of valve rod.
Fig. 5 is the structural representation of valve seat.
Fig. 6 is the sectional view of valve seat.
Fig. 7 is the structural representation of piston.
In figure, 1, cylinder body, 2, piston, 3, baffle plate, 4, valve rod, 5, valve seat, 8, piston rod, 9, straight pin, 10, locking screw
Mother, 11, holding screw, 12, sharp side, 13, valve rod taper end, 14, sealing curved surface, 15, drain path, 18, valve rod circle tympanic part position,
19th, cylinder cap, 20, space, 21, cylinder bottom, 22, oil guide groove, 23, draining gap.
Embodiment
In Fig. 1,2,3, the present invention includes cylinder body 1, cylinder bottom 21, piston rod 8, the valve rod 4 for pressure release buffering（One）, band
The piston 2 of drain path 15, for the valve seat 5 with the fitted seal of valve rod 4, for limiting the baffle plate 3 of the position of valve seat 5（Two）、
Straight pin 9 for the position of fixed dam 3（Two）, for the locking nut 10 of fixed dam 3 and piston 2, for locking screw
Female 10 locking holding screws 11.It is interference fit between the cylindrical endoporus with drain path 15 of valve seat 5, is reached using interference fit
Prevent effect of the pressure at both sides oil of piston 2 by the clearance leakage between the cylindrical endoporus with drain path 15 of valve seat 5.The band of valve rod 4
There is round tympanic part position（Also referred to as thick portion）18, valve seat 5 carries oil guide groove 22, and circle tympanic part position 18 forms draining gap with drain path 15
23, valve rod 4 freely moves through valve seat 5, drain path 15 in the space 20 of valve rod 4, valve seat 5 and drain path 15 composition
It is dynamic, reach buffering effect so as to which the pressure at both sides oil of piston 2 turns on pressure release by oil guide groove 22, draining gap 23, space 20.Pass through
The size in adjustment draining gap 23 can control the speed of draining, so as to control the speed that pressure release buffers.With sealing on valve rod 4
Curved surface 14, valve seat 5 carry sharp side 12.When 4 20 two limit positionses of mobile space of valve rod, seal curved surface 14 and the contact of sharp side 12 is stung
Tight oil sealing, so as to which the oil conducting of the pressure at both sides of blocking piston 2 reaches the effect for terminating to buffer.When piston is close to stroke both ends, valve
The thin portion 13 of bar 4 touches promotion by cylinder bottom 21 or guide sleeve 19, so that valve rod 4 moves freely between valve seat 5, space 20.
Coordinate between the endoporus of valve seat 5 and the thin portion 13 of valve rod 4 are cylindrical for gap, gap value selects according to actual conditions, it is ensured that valve rod 4 is in sky
Between move freely in 20.
In Fig. 4, valve rod 4 includes coordinating the thin portion 13 of assembling, the thick portion 18 positioned at centre, valve rod positioned at both ends and pilot hole
It is connected between 4 thin portion and thick portion for the transition part with the medial end fitted seal of valve seat 5.Valve rod transition part outer surface is
Curved surface 14 is sealed, sealing curved surface is truncated cone-shaped curved surface, and truncated cone-shaped curved surface is provided with round and smooth transition cambered surface, transition at small end face
Cambered surface radius R=4mm, corner angle A=70 ° of truncated cone-shaped curved surface.
In Fig. 5,6, valve seat 5 carries oil guide groove 22, sharp side 12.
In Fig. 7, there is drain path 15 on piston 2.
Claims (9)
- A kind of 1. pressure release buffering hydraulic cylinder, it is characterised in that：Including cylinder body（1）, cylinder bottom（21）, piston rod（8）, piston（2）, it is living Plug（2）It is provided with drain path（15）, for beating opening/closing drain path（15）Control valve；The control valve is loaded on drain path respectively including two（15）The valve seat at both ends（5）, valve rod（4）；The valve seat（5）In Portion is pilot hole, valve seat（5）Outer wall is provided with the oil guide groove that is connected with pilot hole（22）；The valve rod（4）Including positioned at both ends Coordinate the thin portion of assembling, the thick portion positioned at centre, the valve rod with pilot hole（4）Thin portion and thick portion between be connected with for Valve seat（5）The transition part of medial end fitted seal.
- 2. pressure release buffering hydraulic cylinder according to claim 1, it is characterised in that：The valve seat（5）With drain path（15） Between for interference fit, the valve rod（4）Thick portion and drain path（15）Between coordinate for gap to form draining gap （23）.
- 3. pressure release buffering hydraulic cylinder according to claim 1, it is characterised in that：The valve seat（5）Outboard end is provided with gear Plate（3）.
- 4. pressure release buffering hydraulic cylinder according to claim 3, it is characterised in that：The piston rod（8）For step cylinder Body, including big cylindrical portion, middle cylindrical portion, small column portion, piston（2）Middle cylindrical portion is set in, small column portion is equipped with locking nut （10）.
- 5. pressure release buffering hydraulic cylinder according to claim 4, it is characterised in that：The locking nut（10）It is upper that tightening is housed Screw（11）.
- 6. pressure release buffering hydraulic cylinder according to claim 3, it is characterised in that：The baffle plate（3）Sell and be positioned at piston （2）The left and right sides, piston（2）Left side baffle plate（3）It is butted on big cylindrical portion, piston（2）Right-hand apron（3）It is butted on locking nut （10）.
- 7. pressure release buffering hydraulic cylinder according to claim 3, it is characterised in that：The baffle plate（3）On be provided with and be easy to valve rod （4）The resigning hole of stretching.
- 8. pressure release buffering hydraulic cylinder according to claim 1, it is characterised in that：The valve rod（4）Transition part outer surface To seal curved surface（14）, the sealing curved surface is truncated cone-shaped curved surface, and truncated cone-shaped curved surface is provided with transition cambered surface, mistake at small end face It is R to cross cambered surface radius, 3mm≤R≤5mm, and the corner angle of truncated cone-shaped curved surface is A, 65 °≤A≤75 °.
- 9. pressure release buffering hydraulic cylinder according to claim 1, it is characterised in that：The valve rod（4）Thick portion and two transition Portion is in Spindle shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808921.XA CN107806457A (en) | 2016-09-08 | 2016-09-08 | A kind of pressure release buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808921.XA CN107806457A (en) | 2016-09-08 | 2016-09-08 | A kind of pressure release buffering hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806457A true CN107806457A (en) | 2018-03-16 |
Family
ID=61576021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610808921.XA Pending CN107806457A (en) | 2016-09-08 | 2016-09-08 | A kind of pressure release buffering hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107806457A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340216A (en) * | 2018-12-10 | 2019-02-15 | 江苏恒立液压股份有限公司 | Cushion cylinder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2902007A (en) * | 1957-05-31 | 1959-09-01 | Allis Chalmers Mfg Co | Cylinder piston assembly with pressure relieving means |
| US3311026A (en) * | 1965-12-27 | 1967-03-28 | Caterpillar Tractor Co | Bypass valve for hydraulic jacks |
| CN202510450U (en) * | 2012-03-30 | 2012-10-31 | 山推工程机械股份有限公司 | Hydraulic oil cylinder and hydraulic system |
| CN103438050A (en) * | 2013-09-02 | 2013-12-11 | 山西北方机械制造有限责任公司 | Buffer-after-unloading oil cylinder device |
| CN203548411U (en) * | 2013-11-27 | 2014-04-16 | 山东天一液压科技股份有限公司 | Novel hydraulic oil cylinder unloading structure |
| CN203627378U (en) * | 2013-12-31 | 2014-06-04 | 德州宇力液压有限公司 | Decompression valve for lift cylinder of bulldozer |
| CN204739033U (en) * | 2015-05-18 | 2015-11-04 | 南京海杰机械制造有限公司 | Interior formula buffering hydro -cylinder of letting out |
| CN206257106U (en) * | 2016-09-08 | 2017-06-16 | 湖北江山液压科技有限公司 | A kind of pressure release buffering hydraulic cylinder |
-
2016
- 2016-09-08 CN CN201610808921.XA patent/CN107806457A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2902007A (en) * | 1957-05-31 | 1959-09-01 | Allis Chalmers Mfg Co | Cylinder piston assembly with pressure relieving means |
| US3311026A (en) * | 1965-12-27 | 1967-03-28 | Caterpillar Tractor Co | Bypass valve for hydraulic jacks |
| CN202510450U (en) * | 2012-03-30 | 2012-10-31 | 山推工程机械股份有限公司 | Hydraulic oil cylinder and hydraulic system |
| CN103438050A (en) * | 2013-09-02 | 2013-12-11 | 山西北方机械制造有限责任公司 | Buffer-after-unloading oil cylinder device |
| CN203548411U (en) * | 2013-11-27 | 2014-04-16 | 山东天一液压科技股份有限公司 | Novel hydraulic oil cylinder unloading structure |
| CN203627378U (en) * | 2013-12-31 | 2014-06-04 | 德州宇力液压有限公司 | Decompression valve for lift cylinder of bulldozer |
| CN204739033U (en) * | 2015-05-18 | 2015-11-04 | 南京海杰机械制造有限公司 | Interior formula buffering hydro -cylinder of letting out |
| CN206257106U (en) * | 2016-09-08 | 2017-06-16 | 湖北江山液压科技有限公司 | A kind of pressure release buffering hydraulic cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340216A (en) * | 2018-12-10 | 2019-02-15 | 江苏恒立液压股份有限公司 | Cushion cylinder |
| CN109340216B (en) * | 2018-12-10 | 2024-03-26 | 江苏恒立液压股份有限公司 | Buffer oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191108 Address after: 441004 Lianhua Road, Nissan Industrial Park, Xiangyang hi tech Zone, Hubei Province, No. 1 Applicant after: HUBEI JIANGSHAN HEAVY INDUSTRIES CO., LTD. Address before: 441004 No. 1 Lianhua Road, Nissan Industrial Park, hi tech Zone, Hubei, Xiangfan Applicant before: Hubei Jiangshan Hydraulic Technology Co., Ltd. |