CN105673615B - A kind of two ends have the pressurized strut of buffer unit - Google Patents
A kind of two ends have the pressurized strut of buffer unit Download PDFInfo
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- CN105673615B CN105673615B CN201610117854.7A CN201610117854A CN105673615B CN 105673615 B CN105673615 B CN 105673615B CN 201610117854 A CN201610117854 A CN 201610117854A CN 105673615 B CN105673615 B CN 105673615B
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- Prior art keywords
- buffer unit
- end cap
- piston
- spring
- throttling
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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
- F15B15/20—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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/755—Control of acceleration or deceleration of the output member
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
- Actuator (AREA)
Abstract
The present invention relates to the pressurized strut that a kind of two ends have buffer unit, the two ends of the pressurized strut, which are respectively equipped with, takes in end buffer unit and stretching end buffer unit, the inner chamber of cylinder has been divided into two chambers by piston (6), piston (6) includes piston head and piston rod, cylinder can carry out relative motion with piston (6), and twice O-ring seal is provided between cylinder and piston head, by the fluid cut-off of two chambers, takeing in end buffer unit includes stretching out ozzle, band ear end cap (1), first throttle check valve (2), sealing structure (3), cushioning support-saddle (4), first spring base (5)；Stretching out end buffer unit includes takeing in ozzle, end cap (7), the second throttling one-way valve (9), second spring seat (11)；Band ear end cap (1) is provided with the first oil circuit hole.When piston movement is to away from stretching out the limit or when takeing in limit certain distance, fluid can only be by the throttle orifice oil return of throttling one-way valve, so as to realize buffering, and buffer speed is controllable.When by throttling one-way valve oil-feed, it is opened in oil pressure effect bottom spool, product normally stretches out and taken in.The buffer unit structure is compact, reliable operation, small volume, lightweight.
Description
Technical field
Invention belongs to hydraulic system executing agency, the pressurized strut with two ends buffer unit.
Background technology
Pressurized strut as hydraulic system executing agency, when pressurized strut drives the mechanism of big quality quickly to move momentum compared with
Greatly, in two limit positionses, with end cap or bushing mechanical collision occurs for piston, by the big impact of generation and noise.It can not only draw
Play pressurized strut to damage in itself, and severely impact the damage of pipeline, various valve classes and other related elements.Accordingly, it would be desirable to
Buffer unit is set inside pressurized strut, when apart from two limit positionses certain distance, cushioning effect is played.Set at pressurized strut two ends
Buffer unit, the axially and radially space of product accordingly increases according to buffer distance, and buffer unit structure is complicated, processing
Required precision is higher so that the volume and weight of product increases, and cost is high.
The content of the invention
The technical program, which is mainly constituted, sees accompanying drawing 1, takes in end buffer unit main by throttling one-way valve, cushioning support-saddle and bullet
Spring abutment is constituted.Spring base is sealed with being connected through a screw thread with ear end cap by sealing ring, and contact of the cushioning support-saddle with piston is
Discontinuity, a kind of special sealing structure is needed between cushioning support-saddle and piston, to solve the sealing problem at this.Pass through choosing
The sealing structure constituted with waved spring, pin and fluoroplastics circle, has certain between Seat Seal groove side and sealing structure
Gap, the external diameter of fluoroplastics is slightly smaller than piston head internal diameter.Sealing mechanism at this：When cushioning support-saddle and piston contact, in pressure
Under difference effect, waved spring causes fluoroplastics circle distending, there is contact between fluoroplastics circle and piston head endoporus, plays sealing
Effect.When cushioning support-saddle and piston disconnect, the sealing structure on cushioning support-saddle is without pressure difference, and fluoroplastics circle is contracted to free shape
State.
External part buffer unit is mainly made up of throttling one-way valve, spring base, has sealing to tie between oil circuit hole and oil circuit hole
Structure so that oil circuit hole can not be communicated with oil circuit hole.Spring base is connected through a screw thread with end cap, and is sealed by sealing ring.
The technical scheme is that：A kind of two ends have the pressurized strut of buffer unit, and the two ends of the pressurized strut are set respectively
Take in end buffer unit and stretch out end buffer unit, the inner chamber of cylinder has been divided into two chambers by piston 6, and piston 6 is wrapped
Include piston head and piston rod, cylinder can carry out relative motion with piston 6, and be provided between cylinder and piston head twice O
Type sealing ring, the fluid of two chambers is separated, and takeing in end buffer unit includes stretching out ozzle 13, band ear end cap 1, first throttle
Check valve 2, sealing structure 3, cushioning support-saddle 4, the first spring, the first spring base 5；Stretching out end buffer unit includes takeing in ozzle
14th, end cap 7, the second throttling one-way valve 9, second spring and second spring seat 12；Band ear end cap 1 is provided with the first asphalt channel
11；First spring supporting is between the spring base 5 of first throttle check valve 2 and first；It is unidirectional that second spring is supported on the second throttling
Between valve 9 and second spring seat 12；
Take in one end of cushioning support-saddle 4 of end buffer unit to fit with ear end cap, the other end is fitted with the first spring base,
First spring base 5 is sealed with being connected through a screw thread with ear end cap 1 by O-ring seal, and first throttle check valve is arranged on the
One spring base and between ear end cap, the contact surface of first throttle check valve is taper surface, and taper surface and the first asphalt channel
Sharp side contact, relative motion can be carried out between cushioning support-saddle 4 and piston head, and set between cushioning support-saddle 4 and piston head
It is equipped with sealing structure 3；Cushioning support-saddle 4 is provided with seal groove, and described sealing structure 3 is arranged in the seal groove, cushioning support-saddle
There is certain gap between seal groove side and sealing structure, sealing structure 3 is what waved spring, pin and fluoroplastics circle were constituted
Component, the external diameter of fluoroplastics circle is slightly smaller than piston head internal diameter；
Second spring seat 12 is connected through a screw thread with end cap 7, and is sealed by O-ring seal；End cap is middle insertion knot
Structure, and end cap central is formed with step-like center oil circuit hole, the side wall of end cap 7 and is provided with the second asphalt channel 8 and the 3rd oil circuit
Passage 10, the second asphalt channel 8 and the 3rd asphalt channel 10 are located at center oil circuit hole rear and front end, the second throttling one-way valve respectively
9 are arranged between the oil circuit hole of second spring Zuo12Yu centers, and the contact surface of the second throttling one-way valve is taper surface, and taper surface with
The sharp side contact in end cap central oil circuit hole.
Application method, when stretching ozzle leads to hydraulic oil, the valve element of first throttle check valve is opened under oil pressure effect,
Pressurized strut is moved to direction is stretched out, when piston head, which is moved to, to be contacted with the second asphalt channel 8, first of O-shaped sealing of piston
Circle blocks the second asphalt channel, fluid can only the throttle orifice oil return through the 3rd asphalt channel 10 and the second throttling one-way valve successively,
Realize and stretch out end buffering；When to pressurized strut take in ozzle lead to hydraulic oil when, oil pressure effect under the second throttling one-way valve valve
Core is opened, and pressurized strut is moved to direction is taken in, when piston head, which is moved to, to be contacted with the sealing structure on cushioning support-saddle 4, oil
End buffering is taken in throttle orifice and first asphalt channel oil return of the liquid Jing Guo first throttle check valve, realization.
The beneficial effects of the invention are as follows：When product is moved to away from stretching out the limit or takeing in limit certain distance, product is only
Can be by the throttle orifice oil return of throttling one-way valve, so as to realize buffering, and buffer speed is controllable.Enter when by throttling one-way valve
When oily, it is opened in oil pressure effect bottom spool, product normally stretches out and taken in.The buffer unit structure is compact, does not increase substantially
The axially and radially space of product, buffering is reliable, and small volume is lightweight.
Brief description of the drawings
Fig. 1 is that piston is in the schematic diagram for takeing in extreme position；
Fig. 2 is that piston is in the schematic diagram for stretching out extreme position；
Fig. 3 is the schematic diagram of partial enlargement；
Wherein：1- bands ear end cap, 2- first throttles check valve, 3- sealing structures, 4- cushioning support-saddles, the spring bases of 5- first,
6- pistons, 7- end caps, the asphalt channels of 8- second, the throttling one-way valves of 9- second, the asphalt channels of 10- the 3rd, the oil circuits of 11- first lead to
Road, 12- second springs seat, 13- stretch out ozzle, 14- and take in ozzle.
Embodiment
Pressurized strut as hydraulic system executing agency, when pressurized strut drives the mechanism of big quality quickly to move momentum compared with
Greatly, in two limit positionses, with end cap or bushing mechanical collision occurs for piston, by the big impact of generation and noise.It can not only draw
Play pressurized strut to damage in itself, and severely impact the damage of pipeline, various valve classes and other related elements.Accordingly, it would be desirable to
Buffer unit is set inside pressurized strut, when apart from two limit positionses certain distance, cushioning effect is played.
The primary structure of such a buffer unit is as shown in accompanying drawing 1~3.
There is provided a kind of two ends has the pressurized strut of buffer unit, and the two ends of the pressurized strut, which are respectively equipped with, takes in end buffering dress
Put and stretch out end buffer unit, the inner chamber of cylinder has been divided into two chambers by piston 6, and piston 6 includes piston head and piston rod,
Cylinder can carry out relative motion with piston 6, and be provided with twice O-ring seal between cylinder and piston head, by two chambers
Fluid cut-off, takeing in end buffer unit includes stretching out ozzle 13, band ear end cap 1, first throttle check valve 2, sealing structure
3rd, cushioning support-saddle 4, the first spring, the first spring base 5；Stretching out end buffer unit includes takeing in ozzle 14, end cap 7, second section
Flow check valve 9, second spring and second spring seat 12；Band ear end cap 1 is provided with the first asphalt channel 11；First spring supporting exists
The spring base 5 of first throttle check valve 2 and first；Second spring is supported between the second throttling one-way valve 9 and second spring seat 12；
Take in one end of cushioning support-saddle 4 of end buffer unit to fit with ear end cap, the other end is fitted with the first spring base,
First spring base 5 is sealed with being connected through a screw thread with ear end cap 1 by O-ring seal, and first throttle check valve is arranged on the
One spring base and between ear end cap, the contact surface of first throttle check valve is taper surface, and taper surface and the first asphalt channel
Sharp side contact, relative motion can be carried out between cushioning support-saddle 4 and piston head, and set between cushioning support-saddle 4 and piston head
It is equipped with sealing structure 3；Cushioning support-saddle 4 is provided with seal groove, and described sealing structure 3 is arranged in the seal groove, cushioning support-saddle
There is certain gap between seal groove side and sealing structure, sealing structure 3 is what waved spring, pin and fluoroplastics circle were constituted
Component, the external diameter of fluoroplastics circle is slightly smaller than piston head internal diameter；
Second spring seat 12 is connected through a screw thread with end cap 7, and is sealed by O-ring seal；End cap is middle insertion knot
Structure, and end cap central is formed with step-like center oil circuit hole, the side wall of end cap 7 and is provided with the second asphalt channel 8 and the 3rd oil circuit
Passage 10, the second asphalt channel 8 and the 3rd asphalt channel 10 are located at center oil circuit hole rear and front end, the second throttling one-way valve respectively
9 are arranged between the oil circuit hole of second spring Zuo12Yu centers, and the contact surface of the second throttling one-way valve is taper surface, and taper surface with
The sharp side contact in end cap central oil circuit hole.
The application method of above-mentioned pressurized strut, when stretching ozzle leads to hydraulic oil, first throttle is unidirectional under oil pressure effect
The valve element of valve is opened, and pressurized strut is moved to direction is stretched out, when piston head, which is moved to, to be contacted with the second asphalt channel 8, piston
First of O-ring seal block the second asphalt channel, fluid can only be unidirectional through the 3rd asphalt channel 10 and the second throttling successively
The throttle orifice oil return of valve, realizes and stretches out end buffering；When to pressurized strut take in ozzle lead to hydraulic oil when, oil pressure effect under second
The valve element of throttling one-way valve is opened, and pressurized strut is moved to direction is taken in, when piston head is moved to and the sealing on cushioning support-saddle 4
During form touch, end buffering is taken in throttle orifice and first asphalt channel oil return of the fluid Jing Guo first throttle check valve, realization.
As described above, when product is moved to away from stretching out the limit or takeing in limit certain distance, product can only pass through throttling
The throttle orifice oil return of check valve, so that buffering is realized, and buffer speed is controllable.When by throttling one-way valve oil-feed, in oil
Pressure effect bottom spool is opened, and product normally stretches out and taken in.The buffer unit structure is compact, reliable operation, small volume, weight
Gently.
Claims (2)
1. a kind of two ends have the pressurized strut of buffer unit, the two ends of the pressurized strut, which are respectively equipped with, takes in end buffer unit and stretches
Go out end buffer unit, the inner chamber of cylinder has been divided into two chambers by piston (6), and piston (6) includes piston head and piston rod, cylinder
Body can carry out relative motion with piston (6), and be provided with twice O-ring seal between cylinder and piston head, by two chambers
Fluid cut-off, take in end buffer unit include stretching out ozzle (13), it is band ear end cap (1), first throttle check valve (2), close
Seal structure (3), cushioning support-saddle (4), the first spring, the first spring base (5)；Stretching out end buffer unit includes takeing in ozzle
(14), end cap (7), the second throttling one-way valve (9), second spring and second spring seat (12)；Band ear end cap (1) is provided with first
Asphalt channel (11)；First spring supporting is between first throttle check valve (2) and the first spring base (5)；Second spring is supported
Between the second throttling one-way valve (9) and second spring seat (12)；
Cushioning support-saddle (4) one end for takeing in end buffer unit is fitted with ear end cap, and the other end is fitted with the first spring base, the
One spring base (5) is sealed with being connected through a screw thread with ear end cap (1) by O-ring seal, and first throttle check valve is arranged on
First spring base and between ear end cap, the contact surface of first throttle check valve is taper surface, and taper surface leads to the first oil circuit
The sharp side contact in road, cushioning support-saddle (4) can carry out relative motion between piston head, and in cushioning support-saddle (4) and piston head
Between be provided with sealing structure (3)；Cushioning support-saddle (4) is provided with seal groove, and described sealing structure (3) is arranged on the seal groove
In, there is certain gap between the seal groove side of cushioning support-saddle and sealing structure, sealing structure (3) is waved spring, pin
The component constituted with fluoroplastics circle, the external diameter of fluoroplastics circle is slightly smaller than piston head internal diameter；
Second spring seat (12) is connected through a screw thread with end cap (7), and is sealed by O-ring seal；End cap is middle insertion knot
It is formed with structure, and end cap on step-like center oil circuit hole, end cap (7) side wall and is provided with the second asphalt channel (8) and the 3rd oil
Paths (10), the second asphalt channel (8) is located at center oil circuit hole rear and front end, second section respectively with the 3rd asphalt channel (10)
Flow check valve (9) to be arranged between second spring seat (12) and center oil circuit hole, the contact surface of the second throttling one-way valve is taper
Face, and taper surface contacts with the sharp side in end cap central oil circuit hole.
2. the application method of the pressurized strut described in claim 1, when stretching out ozzle (13) and leading to hydraulic oil, the under oil pressure effect
The valve element of one throttling one-way valve is opened, and pressurized strut is moved to direction is stretched out, when piston head is moved to and the second asphalt channel (8)
During contact, first of O-ring seal of piston blocks the second asphalt channel, fluid can only successively through the 3rd asphalt channel (10) and
The throttle orifice oil return of second throttling one-way valve, realizes and stretches out end buffering；When to pressurized strut take in ozzle (14) lead to hydraulic oil when,
The valve element of the second throttling one-way valve is opened under oil pressure effect, and pressurized strut move to direction is taken in, move to when piston head and
When sealing structure on cushioning support-saddle (4) is contacted, fluid is returned by the throttle orifice and the first asphalt channel of first throttle check valve
End buffering is taken in oil, realization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117854.7A CN105673615B (en) | 2016-03-02 | 2016-03-02 | A kind of two ends have the pressurized strut of buffer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117854.7A CN105673615B (en) | 2016-03-02 | 2016-03-02 | A kind of two ends have the pressurized strut of buffer unit |
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| Publication Number | Publication Date |
|---|---|
| CN105673615A CN105673615A (en) | 2016-06-15 |
| CN105673615B true CN105673615B (en) | 2017-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610117854.7A Active CN105673615B (en) | 2016-03-02 | 2016-03-02 | A kind of two ends have the pressurized strut of buffer unit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799252B (en) * | 2018-08-06 | 2024-04-16 | 山西航天清华装备有限责任公司 | Hydraulic cylinder with adjustable bidirectional buffering speed |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3613503A (en) * | 1969-04-28 | 1971-10-19 | Cessna Aircraft Co | Hydraulic cylinder with pressure control |
| JP2006038036A (en) * | 2004-07-23 | 2006-02-09 | Furukawa Co Ltd | Shock-absorber for hydraulic cylinder |
| CN101235837A (en) * | 2008-03-07 | 2008-08-06 | 汪立平 | Constant throttle -type amortization structure high pressure oil cylinder |
| CN201330769Y (en) * | 2008-12-05 | 2009-10-21 | 韶关液压件厂有限公司 | Surface-contact type cushioning device for hydraulic cylinder |
| CN201747693U (en) * | 2010-07-16 | 2011-02-16 | 江苏龙城洪力液压设备有限公司 | Hydraulic cylinder with buffer function |
| CN102493970A (en) * | 2011-12-30 | 2012-06-13 | 贵州枫阳液压有限责任公司 | Oil cylinder for bucket arm of excavator |
| CN203130670U (en) * | 2013-03-15 | 2013-08-14 | 南京众得利自动化机械有限公司 | Changeable oil-cylinder throttling device |
| CN203641153U (en) * | 2013-10-24 | 2014-06-11 | 长沙星欣机械设备有限公司 | Butter type hydraulic oil cylinder |
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2016
- 2016-03-02 CN CN201610117854.7A patent/CN105673615B/en active Active
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| Publication number | Publication date |
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| CN105673615A (en) | 2016-06-15 |
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