CN108006009B - A kind of cylinder cushion device - Google Patents
A kind of cylinder cushion device Download PDFInfo
- Publication number
- CN108006009B CN108006009B CN201711223480.8A CN201711223480A CN108006009B CN 108006009 B CN108006009 B CN 108006009B CN 201711223480 A CN201711223480 A CN 201711223480A CN 108006009 B CN108006009 B CN 108006009B
- Authority
- CN
- China
- Prior art keywords
- hole
- cylinder
- deflector
- oil
- buffing pad
- 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
-
- 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
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
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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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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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)
Abstract
The invention mainly relates to technical field of hydraulic equipment, specifically disclose a kind of cylinder cushion device, including cylinder body, it is equipped with piston rod and piston in cylinder body, piston includes deflector and buffing pad, deflector is equipped with containing groove, oil guiding hole and relief hole, it is placed with oil ring in containing groove, sprue is connected on oil ring, is equipped with ball groove and pilot hole in buffing pad, spring and stifled ball are equipped in ball groove, buffing pad lower hinge has guide plate.Present invention is mainly applied to generate buffer function in hydraulic cylinder, solve the problems, such as that hydraulic cylinder buffering effect is bad.
Description
Technical field
The invention belongs to technical field of hydraulic equipment, specifically disclose a kind of cylinder cushion device.
Background technique
Hydraulic system is usually used in the biggish equipment of some load-bearing, such as the large scale equipments such as crane, excavator and loading machine
On, hydraulic system can provide stable power for these large scale equipments, ensure being normally carried out for construction operation.
It is extensive in the mechanical arm of large scale equipment since hydraulic device self gravity is larger but in the hydraulic system of the prior art
When multiple home position, it is difficult these heavier mechanical arms slowly falling on original position, mechanical arm has been be easy to cause sharply to decline, it is mechanical
Wall, which sharply declines, be easy to cause biggish impact, since hydraulic system does not have buffer unit, will lead to the damage of mechanical equipment.
In view of the above-mentioned problems, the patent of Chinese patent CN104747534B discloses a kind of hydraulic cylinder relief means,
It is equipped with an outer cylinder body and a piston rod, which is set in outer cylinder body and is equipped with a piston, which is equipped with a knot
Conjunction portion and a flow portion, the engaging portion are equipped with an engagement groove, a ball groove, multiple side relief holes, a pressure release ball and an elastic element,
The flow portion is formed in the one end of the engaging portion equipped with ball groove and is equipped with a containing groove, one only oil ring, a central channel, multiple first
Oil guiding hole and multiple second oil guiding holes, the containing groove are set to the outer surface of the flow portion, are respectively formed the two sides of the containing groove
One first flange and one second flange, each first oil guiding hole communicate, each second Oil Guide through first flange with the containing groove
Hole is communicated through second flange and with the containing groove, can slow down the hydraulic cylinder relief means of impact phenomenon to provide one.
Using foregoing invention cylinder cushion device when, when the pressure of only axle center hole side is larger, pass through pressure release ball
Technical ability carry out pressure release, but piston side pressure it is larger when, led since the aperture of the first oil guiding hole in foregoing invention is small with second
The aperture of oilhole causes hydraulic oil when pressure release that cannot pass through the first oil guiding hole in time, be easy to cause pressure excessive, causes equipment broken
It splits；In the program pressure release ball can only unidirectional pressure release, cause buffering effect bad.
Summary of the invention
The purpose of the present invention is providing a kind of cylinder cushion device, bad to solve existing buffer unit buffering effect
The problem of.
In order to achieve the above object, base case of the invention are as follows: a kind of cylinder cushion device, including cylinder body and be located at
The intracorporal piston of cylinder, is connected with piston rod on the piston, and the piston includes deflector and buffing pad, the deflector and buffering
Seat is fixedly connected；
Be axially arranged with the containing groove being recessed inwardly on the deflector, the containing groove by deflector be divided into the first flange and
Second flange, first flange are equipped with multiple equally distributed relief holes close to the edge of inboard wall of cylinder block, and the second flange is separate
One end of inboard wall of cylinder block is equipped with the oil guiding hole equal with pressure release hole number, and the aperture of the oil guiding hole is greater than the aperture of relief hole,
The oil ring of annular is equipped in the containing groove, the inner surface of the oil ring and the cylinder body mutually reclines, and is equipped on the inside of the oil ring
Strut corresponding with pressure release hole number, the strut are equipped with sprue corresponding with Oil Guide hole site far from the end of oil ring,
The axial line of the deflector is equipped with central channel；
The buffing pad axis direction is equipped with the ball groove being connected to central channel, and the inside of the buffing pad is equipped with multiple guiding
Hole, the pilot hole are symmetrically in "eight" shape along buffing pad axial line, and the pilot hole is connected with ball groove, are set in the ball groove
There is stifled ball, is connected with the first spring between the stifled ball and ball groove bottom.
The working principle of this base case is: when piston rod pushes piston motion, deflector pushes hydraulic oil mobile,
Deflector pushes the pressure of face side greater than the pressure of the deflector other side, since the first flange and the second flange are respectively equipped with and lead
Oilhole and relief hole, and the aperture of oil guiding hole be greater than relief hole aperture, hydraulic oil can from Oil Guide by relief hole to pressure compared with
Big side carries out pressure release, plays the role of buffering；When piston motion rate is larger, the big side of pressure pushes face to bear
Pressure increase, due to being equipped with the sprue of oil ring and connection in containing groove, oil ring can be sticked on first by the effect of hydraulic oil
Between flange and inboard wall of cylinder block, sprue can also be moved adjacent to the position of the first flange, since sprue is not got lodged at oil guiding hole,
Hydraulic oil can pass through oil guiding hole in time；It, can oil guiding hole and relief hole since cylinder interior pressure is larger when piston mobile rate is big
It is not enough to fast cache；Due to being equipped with stifled ball and spring in ball groove, and central channel and ball groove communicate, and hydraulic oil can push away stifled ball
It is dynamic, by spring-compressed；Since stifled ball blocks pilot hole in normal state, thus stifled ball pushed after pilot hole, ball groove and in
The connection of heart slot, hydraulic oil can be flowed out by pilot hole in time, play buffer function.
When piston rod is twitched, the pressure of piston rod side becomes larger, and hydraulic oil pushes oil ring to stick on the second flange and cylinder body
Between inner wall, hydraulic oil can be buffered the pressure of piston rod side by relief hole and oil guiding hole；When piston rod carries speed
When rate is excessive, biggish pressure can be generated in piston rod side, oil ring will bear against in the edge of oil cylinder inner wall and the second flange, block up
Block will be got lodged in oil guiding hole, and hydraulic oil can carry out pressure release by relief hole and oil guiding hole, since piston rod side pressure is larger, and be led
It is symmetrically in "eight" shape to the axial line between hole with buffing pad, hydraulic oil can import in pilot hole in time, pressure in pilot hole
Increase, stifled ball is pushed, and hydraulic oil is flowed out by ball groove and central channel, is reduced the pressure of piston rod side in time, is played slow
Punching effect after pressure balance, blocks up ball and blocks central channel and pilot hole.
The beneficial effect of this base case is: can carry out pressure release to the both direction of piston motion using this programme, rise
The effect for having arrived bidirectional buffering when pressure is larger, can not only carry out pressure release by relief hole and oil guiding hole and play buffer function, together
When the intracorporal pressure of cylinder can be adjusted in time by pilot hole, play buffer function, it is noted that pressure release speed, increase buffering effect
Rate.
Compared with prior art, sprue is connected on oil ring in this programme, can control the liquid that oil guiding hole passes through by sprue
Pressure oil flow is unlikely to keep hydraulic oil flow rate too fast, causes buffering course very fast, desired buffering effect is not achieved, protects simultaneously
The normal operation of hydraulic cylinder is hindered；The pilot hole of "eight" shape is set in buffing pad, can be made by pilot hole when pressure is excessive
Hydraulic oil generates oblique thrust to stifled ball, carries out pressure release buffering so that stifled ball be pushed, the pilot hole than linear is easier to play
Buffering effect can play pressure release buffer function in reciprocating motion of the pistons；It is equipped with guide plate in the bottom of pilot hole, in pressure
When excessive, hydraulic oil can push guide plate angled with pilot hole, and guide plate is made by the flow direction of change hydraulic oil
Hydraulic oil enters pilot hole and stifled ball is pushed to carry out pressure release.
Further, the lower hinge of the pilot hole has guide plate identical with guiding hole number, the position of the guide plate
Set positioned opposite with the position of pilot hole, when reciprocating motion of the pistons, guide plate can be led according to the variation of pressure by hydraulic
Xiang Chong increases buffering effect.
Further, the cross-sectional width of the guide plate and the aperture of pilot hole are identical, are oriented to the larger Shi Nengying of board width
The flowing for ringing hydraulic oil in cylinder body when the width of guide plate and the identical aperture of pilot hole, guiding can be played to hydraulic oil and is made
With, and the flowing of hydraulic oil is not influenced.
Further, the guide plate material is pvc material, the light weight of pvc material, guide plate when cylinder interior pressure balances
It can be in suspended state, when cylinder interior pressure changes, the guide plate of pvc material is more mobile than the guide plate of metal material more
Flexibly.
Further, protruding block is fixed on the outer wall of the buffing pad, protruding block can prevent guide plate to be affixed with buffing pad
It leans on, guide plate is avoided to block pilot hole and preferable buffering effect is not achieved.
Further, the protruding block is second spring, and when pressure is out-of-date, second spring can prevent guide plate and second spring
Fixed position is rested on after reclining, after guide plate compresses second spring, second spring can in time be bounced off guide plate outside buffing pad
Wall.
Further, the free end of the second spring is connected with baffle, when baffle and guide plate contact, it is not easy to occur wrong
Position.
Detailed description of the invention
Fig. 1 is a kind of the schematic diagram of the section structure of cylinder cushion device embodiment one of the invention；
Fig. 2 is a kind of the schematic diagram of the section structure of cylinder cushion device embodiment two of the invention.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: cylinder body 1, piston rod 2, buffing pad 3, deflector 4, the first flange 5,
Two flanges 6, relief hole 7, oil guiding hole 8, oil ring 9, strut 10, guide plate 11, pilot hole 12, stifled ball 13, the first spring 14, sprue
15, containing groove 16, central channel 17, ball groove 18, second spring 19, baffle 20.
Embodiment one
As shown in Figure 1, a kind of cylinder cushion device of the invention, including cylinder body 1 and the piston being mounted in cylinder body 1,
The upper end of piston is fixedly connected with piston rod 2, and piston is equipped with deflector 4, and the upper end of piston is buffing pad 3, deflector 4
It is to be integrally formed with buffing pad 3；
The middle section of deflector 4 offers the containing groove 16 being recessed inwardly, and 16 annular of containing groove is recessed in deflector 4
Deflector 4 is divided into the first flange 5 and the second flange 6, is circumferentially on the first flange 5 multiple by the outer surface in portion, containing groove 16
Equally distributed relief hole 7, the second flange 6 offer the oil guiding hole 8 equal with 7 quantity of relief hole, and the aperture of oil guiding hole 8 is greater than
The aperture of relief hole 7, containing groove 16 place one annular oil ring 9, oil ring 9 above when, inner surface of the oil ring 9 with cylinder body 1
It mutually reclines with the edge of the first flange 5, at lower section, oil ring 9 can be affixed with the edge of the second flange 6 and 1 inner surface of cylinder body
It leans on, multiple struts 10 is connected on the inside of oil ring 9, the other end of strut 10 is connected with corresponding with 8 position of oil guiding hole round stifled
Block 15, the diameter of sprue 15 are less than the aperture of oil guiding hole 8, offer inside central channel on the axial line of deflector 4；
The processing of 3 internal axis direction of buffing pad is equipped with the ball groove 18 being connected to central channel 17, is machined with inside buffing pad 3 more
A pilot hole 12, pilot hole 12 are symmetrically in "eight" shape along 3 axial line of buffing pad, and pilot hole 12 is connected with ball groove 18, guiding
The lower section in hole 12 is hinged with guide plate 11, guide plate 11 is corresponding with the quantity of pilot hole 12, position, the upper top of ball groove 18
First spring 14 is installed, the end of the first spring 14 is connected with stifled ball 13, and blocking up ball 13 can be simultaneously by pilot hole 12 and central channel
17 block.
When it is implemented, piston rod 2 pushes down on piston motion, the lower end pressure of deflector 4 becomes larger, due to oil guiding hole 8
Aperture is greater than the aperture of relief hole 7, and hydraulic oil is imported into the top of deflector 4 by oil guiding hole 8 and relief hole 7, therefore reduces
The pressure of 4 lower section of deflector, plays buffer function；When the lower end pressure of deflector 4 is excessive, hydraulic oil is by pushing stifled ball
13 open the inlet and outlet of pilot hole 12, and hydraulic oil is flowed out in time by pilot hole 12, reduce the pressure of 4 lower section of deflector.
When piston rod 2 moves up, the pressure of 4 top of deflector becomes larger, and hydraulic oil passes through relief hole 7 and oil guiding hole 8
4 lower section of deflector is flowed to, the pressure on deflector 4 is reduced, when the pressure of 4 top of deflector is larger, due to guide plate 11
It is hinged on 12 lower section of pilot hole, hydraulic oil pushes guide plate 11 to rotate, and the hydraulic oil blocked by guide plate 11 is along guide plate 11
Direction enters in pilot hole 12, and the hydraulic oil in pilot hole 12 pushes stifled ball 13 mobile, and hydraulic oil is flowed out from central channel 17
Come, reduces the pressure of 4 top of deflector, play buffer function.
Embodiment two
As shown in Fig. 2, installing protruding block in the outside of buffing pad 3, protruding block is by the second bullet on the basis of embodiment one
Spring 19 and baffle 20 form, and when guide plate 11 is close to buffing pad 3, baffle 20 can stop guide plate 11, prevent guide plate
11 stick on buffing pad 3.
Claims (7)
1. a kind of cylinder cushion device, including cylinder body and it is located at the intracorporal piston of cylinder, is connected with piston rod on the piston, it is special
Sign is that the piston includes deflector and buffing pad, and the deflector is fixedly connected with buffing pad；
The containing groove being recessed inwardly is axially arranged on the deflector, deflector is divided into the first flange and second by the containing groove
Flange, first flange are equipped with multiple equally distributed relief holes close to the edge of inboard wall of cylinder block, and the second flange is far from cylinder body
One end of inner wall is equipped with the oil guiding hole equal with pressure release hole number, and the aperture of the oil guiding hole is greater than the aperture of relief hole, described
The oil ring of annular is equipped in containing groove, the inner surface of the oil ring and the cylinder body mutually reclines, and is equipped with and lets out on the inside of the oil ring
The corresponding strut of hole number is pressed, the strut is equipped with sprue corresponding with Oil Guide hole site far from the end of oil ring, described
The axial line of deflector is equipped with central channel；
The buffing pad axis direction is equipped with the ball groove being connected to central channel, and the inside of the buffing pad is equipped with multiple pilot holes,
The pilot hole is symmetrically in "eight" shape along buffing pad axial line, and the pilot hole is connected with ball groove, is equipped in the ball groove
Stifled ball, is connected with the first spring between the stifled ball and ball groove bottom.
2. a kind of cylinder cushion device according to claim 1, which is characterized in that the lower hinge of the pilot hole has
Guide plate identical with guiding hole number, the position of the guide plate and the position of pilot hole are positioned opposite.
3. a kind of cylinder cushion device according to claim 2, which is characterized in that the cross-sectional width of the guide plate
It is identical as the aperture of pilot hole.
4. a kind of cylinder cushion device according to claim 2 or 3, which is characterized in that the guide plate material is pvc
Material.
5. a kind of cylinder cushion device according to claim 1, which is characterized in that fixed on the outer wall of the buffing pad
There is protruding block.
6. a kind of cylinder cushion device according to claim 5, which is characterized in that the protruding block is second spring.
7. a kind of cylinder cushion device according to claim 6, which is characterized in that the free end of the second spring connects
It is connected to baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223480.8A CN108006009B (en) | 2017-11-29 | 2017-11-29 | A kind of cylinder cushion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223480.8A CN108006009B (en) | 2017-11-29 | 2017-11-29 | A kind of cylinder cushion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108006009A CN108006009A (en) | 2018-05-08 |
| CN108006009B true CN108006009B (en) | 2019-06-28 |
Family
ID=62054472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711223480.8A Active CN108006009B (en) | 2017-11-29 | 2017-11-29 | A kind of cylinder cushion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108006009B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724741A (en) * | 1985-09-06 | 1988-02-16 | Knorr-Bremse Ag | Hydraulic spring-loader cylinder with wear adjustment |
| CN201636117U (en) * | 2010-03-10 | 2010-11-17 | 无锡市长江液压缸厂 | Adjustable gap-buffer hydraulic cylinder |
| CN104047924A (en) * | 2014-07-08 | 2014-09-17 | 常州市新墅机床数控设备有限公司 | Locking oil cylinder structure with stroke tail end buffered |
| CN105465098A (en) * | 2015-12-31 | 2016-04-06 | 上海盾克机械有限公司 | Buffer structure device used for spiral swing hydraulic cylinder |
| CN104595281B (en) * | 2015-01-21 | 2016-08-24 | 柳州柳工液压件有限公司 | Cushion cylinder |
| US9484242B2 (en) * | 2013-05-28 | 2016-11-01 | Smc Corporation | Fluid pressure cylinder |
| CN104747534B (en) * | 2013-12-27 | 2017-04-12 | 稳多企业股份有限公司 | Impact buffering device of hydraulic cylinder |
-
2017
- 2017-11-29 CN CN201711223480.8A patent/CN108006009B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724741A (en) * | 1985-09-06 | 1988-02-16 | Knorr-Bremse Ag | Hydraulic spring-loader cylinder with wear adjustment |
| CN201636117U (en) * | 2010-03-10 | 2010-11-17 | 无锡市长江液压缸厂 | Adjustable gap-buffer hydraulic cylinder |
| US9484242B2 (en) * | 2013-05-28 | 2016-11-01 | Smc Corporation | Fluid pressure cylinder |
| CN104747534B (en) * | 2013-12-27 | 2017-04-12 | 稳多企业股份有限公司 | Impact buffering device of hydraulic cylinder |
| CN104047924A (en) * | 2014-07-08 | 2014-09-17 | 常州市新墅机床数控设备有限公司 | Locking oil cylinder structure with stroke tail end buffered |
| CN104595281B (en) * | 2015-01-21 | 2016-08-24 | 柳州柳工液压件有限公司 | Cushion cylinder |
| CN105465098A (en) * | 2015-12-31 | 2016-04-06 | 上海盾克机械有限公司 | Buffer structure device used for spiral swing hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108006009A (en) | 2018-05-08 |
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