CN106151160B - Hydraulic cylinder and excavator with pooling feature - Google Patents
Hydraulic cylinder and excavator with pooling feature Download PDFInfo
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- CN106151160B CN106151160B CN201510210063.4A CN201510210063A CN106151160B CN 106151160 B CN106151160 B CN 106151160B CN 201510210063 A CN201510210063 A CN 201510210063A CN 106151160 B CN106151160 B CN 106151160B
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- buffer plunger
- pooling feature
- hydraulic cylinder
- centre bore
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Abstract
The present invention relates to a kind of hydraulic cylinder and excavator with pooling feature, wherein, hydraulic cylinder with pooling feature includes cylinder body, piston rod and piston are provided with cylinder body, piston rod passes through piston, and one end of the cylinder bottom close to cylinder body is first end, hydraulic cylinder with pooling feature further includes buffer plunger, centre bore is provided with first end, one end of buffer plunger passes through in the centrally disposed hole of limiting device, and it can be moved back and forth in centre bore, the other end of buffer plunger is close to cylinder bottom, and the first groove with being set on cylinder bottom is located on same axis, first set in first groove connection cylinder body is into oil road, at least one throttling channel is provided with buffer plunger, direction of the width of throttling channel from piston to cylinder bottom is gradually reduced, the axially extending bore set in throttling channel connection buffer plunger.The present invention can make oil cylinder rodless cavity in buffering course, and fluid compensator or trimmer pressure consecutive variations, buffer speed is gradually fallen after rise, avoids velocity shock.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of hydraulic cylinder and excavator with pooling feature.
Background technology
During the work time, piston needs to realize constantly to be moved back and forth hydraulic cylinder in excavator, when piston rod contracts
When being back to extreme position, locking nut can produce great impact to cylinder bottom, cause digger operating device operation unstable, and make
Into the structural failure of hydraulic cylinder, therefore, buffer unit need to be set in the rodless cavity of hydraulic cylinder, for preventing hydraulic cylinder
When operation is to stroke end, mechanical collision occurs for locking nut and the cylinder bottom of hydraulic cylinder, produces impact and noise.At present, dig
The rodless cavity buffer structure of pick machine hydraulic cylinder mainly has following two forms：
1) oil circuit and device are set outside oil cylinder into row buffering；Accumulator and hydraulic circuit are set such as outside oil cylinder,
By controlling the break-make of solenoid valve come control cylinder and the break-make of accumulator, when oil cylinder is connected with accumulator, hydraulic cylinder has
Cushioning effect.It is above-mentioned to set accumulator and hydraulic circuit to be had in time certain into the mode of row buffering outside oil cylinder
Retardance so that buffering response speed is slack-off, buffering effect unobvious.
2) specific structure is set inside oil cylinder, is realized and buffered by meter out.Such as in buffer structure, pass through floating
Buffer plunger gos deep into the oil duct on cylinder bottom closing working connection, cushion chamber fluid is returned by the buffer regulating valve at oil cylinder bottom
Oil, reaches buffering effect, and such a device requires floating buffer plunger to have higher machining accuracy, and coaxial with cylinder bottom oil duct
Degree requires high, and floating buffer bar can not dismounting and change so that cushion performance is not easy to adjust, while piston rod buffer structure is local
Failure can cause cylinder piston rod to be replaced, and improve the maintenance cost of oil cylinder.And for example in plunger-type cylinder buffer unit, lead to
The uniformly distributed damping hole crossed on buffering spool carries out throttling buffering, and such a buffer unit is due to the effect of interrupted damping hole so that slow
There are pressure oscillation, compensator or trimmer pressure continuity are poor for stamping press.
The content of the invention
The purpose of the present invention is to propose to a kind of hydraulic cylinder and excavator with pooling feature, it can make oil cylinder rodless
In buffering course, rodless cavity fluid compensator or trimmer pressure consecutive variations, buffer speed is gradually fallen after rise chamber, avoids velocity shock.
To achieve the above object, the present invention provides a kind of hydraulic cylinder with pooling feature, it includes cylinder body, described
Piston rod and piston are provided with cylinder body, one end of cylinder bottom of the piston rod through the piston and close to the cylinder body is
First end, the hydraulic cylinder with pooling feature further includes buffer plunger, centre bore is provided with the first end, described
One end of buffer plunger is arranged in the centre bore by limiting device, and can be moved back and forth in the centre bore, institute
The other end of buffer plunger is stated close to the cylinder bottom, and the first groove with being set on the cylinder bottom is on the same axis, it is described
First groove connects set in the cylinder bottom first into oil road, and at least one throttling channel is provided with the buffer plunger,
The width of the throttling channel is gradually reduced from the piston to the direction of the cylinder bottom, and the throttling channel connects the buffer plunger
The axially extending bore of interior setting.
In above-described embodiment, buffer plunger is arranged to hollow-core construction, and throttling channel is set on buffer plunger, throttling channel
Direction of the width from piston to cylinder bottom is gradually reduced, corresponding, and direction of the orifice size from piston to cylinder bottom is continuously reduced, in oil
In cylinder buffering course, oil cylinder rodless cavity fluid compensator or trimmer pressure consecutive variations, buffer speed is gradually fallen after rise, avoid pressure oscillation and
Velocity shock, improves operating efficiency and comfort.
One preferably or in alternative embodiment, at least two throttling channels are provided with the buffer plunger, it is each described
Throttling channel is arranged circumferentially along the buffer plunger, further promotes the continuous change of oil cylinder rodless cavity fluid compensator or trimmer pressure
Change.
One preferably or in alternative embodiment, the throttling channel is triangular in shape, and is triangle close to one end of the cylinder bottom
The top of shape, is the base of triangle close to one end of the piston.
One preferably or in alternative embodiment, the limiting device includes collar stop, and the collar stop is arranged on institute
State in centre bore, and be connected through a screw thread the piston rod, the buffer plunger is through the collar stop and close to the work
One end of plug is provided with the first step radially extended, by the cooperation of the first step and the collar stop, limits institute
State buffer plunger and skid off the centre bore.
In above-described embodiment, collar stop play the guiding role buffer plunger in buffering course, it is ensured that buffer plunger with
The accurate centering of first groove, detachable structure is arranged to by buffer plunger, is readily disassembled, is replaced, and avoids buffer structure damage
It is bad to cause piston rod all to be replaced, reduce the maintenance cost of oil cylinder.
It is clearance fit between the collar stop and the buffer plunger preferably or in alternative embodiment one.
In above-described embodiment, annular gap between collar stop and buffer plunger buffer stage can with buffer plunger
Throttling channel coordinate, equalizing and buffering surge pressure and buffer speed.
One preferably or in alternative embodiment, the limiting device further includes pressure ring, and the collar stop is close to the cylinder
Several spring eyes are provided with the end face at bottom, holddown spring is provided with the spring eye, the pressure ring is stepped, the pressure
The small size end of ring is arranged in the centre bore, and is connected through a screw thread the piston rod, the small size side pressure of the pressure ring
The tight holddown spring, and then compress the collar stop, the large scale end of the pressure ring is located at outside the centre bore, and with institute
The end for stating piston rod fits closely.
In above-described embodiment, pressure ring is arranged to the screw-internal thread fit of the centre bore of external thread structure and piston rod, is easy to
Pressure ring is compressed collar stop by holddown spring, and holddown spring can reduce pressure ring machining accuracy, while pressure ring is played anti-
The effect of pine.
One preferably or in alternative embodiment, the outer surface at the large scale end of the pressure ring is arranged to hexgonal structure, knot
Structure is simple, is easily assembled.
Preferably or in alternative embodiment, reset bullet is provided between the bottom of the buffer plunger and the centre bore one
Spring.
In above-described embodiment, resetting spring is installed on to the bottom of the centre bore of piston rod, buffer plunger is risen to reset and is made
With, while can cause damage to avoid cushion chamber compensator or trimmer pressure to resetting spring, improve the service life of resetting spring.
One preferably or in alternative embodiment, the buffer plunger sets oriented radially extend close to one end of the cylinder bottom
Second step, during buffering, the second step can be completely into the first groove.
In above-described embodiment, during buffering, the second step of buffer plunger enters in first groove, and first groove is kept off with annular
Block play the guiding role jointly so that lateral deviation does not occur in buffering course for buffer plunger, improves the reliability of buffer structure.
Preferably or in alternative embodiment, the first groove is provided with a ring-shaped groove, institute on the cylinder bottom one
State that ring-shaped groove connection is arranged in the cylinder bottom second is into oil road, and described second into being provided with throttling on oil road
The check valve in hole.
In above-described embodiment, cylinder bottom is provided with the check valve with throttle orifice, prevents oil cylinder from delaying in piston rod buffering course
Rush the excessive destruction caused by cylinder structure of terminal pressure.
One preferably or in alternative embodiment, described second connects institute into oil road by the damping hole on the check valve
First is stated into oil road.
In above-described embodiment, a ring-shaped groove is opened up in cylinder bottom, fluid when oil cylinder is reversely opened is increased and opens unidirectionally
In the active area of rodless cavity after valve, oil cylinder is realized reversely rapid unlatching, improve work efficiency.
One preferably or in alternative embodiment, locking nut is provided with the first end of the piston rod, is passed through
The locking nut is set by the piston and the piston rod locking.
To achieve the above object, present invention also offers a kind of excavator, it includes having in any of the above-described embodiment
The hydraulic cylinder of pooling feature.
Based on above-mentioned technical proposal, the present invention also at least has the advantages that：
Buffer plunger provided by the invention is hollow-core construction, and uniformly distributed several throttling channels on its outer circumferential surface, the width of throttling channel
Spend the direction from piston to cylinder bottom to be gradually reduced, the orifice size of throttling channel is continuously reduced, therefore, buffered in oil cylinder rodless cavity
Cheng Zhong, the compensator or trimmer pressure consecutive variations of rodless cavity fluid, avoids pressure oscillation, buffer speed in buffering course is gradually fallen after rise,
Velocity shock is avoided, enhances the stability of cylinder efficient.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of the hydraulic cylinder provided by the invention with pooling feature；
Fig. 2 is the close-up schematic view of the hydraulic cylinder provided by the invention with pooling feature；
Fig. 3 is the amplification signal of the check valve with throttle orifice in the hydraulic cylinder provided by the invention with pooling feature
Figure；
Fig. 4 is the buffer plunger structure diagram in the hydraulic cylinder provided by the invention with pooling feature；
Fig. 5 is the block end structure illustration in the hydraulic cylinder provided by the invention with pooling feature；
Fig. 6 is the pressure ring end structure illustration in the hydraulic cylinder provided by the invention with pooling feature；
Fig. 7 is pressure ring and block contact site partial enlargement in the hydraulic cylinder provided by the invention with pooling feature
Schematic diagram.
Attached figure label：
1- cylinder bodies；2- piston rods；3- pistons；4- resetting springs；5- locking nuts；6- buffer plungers；7- collar stops；8-
Holding screw；9- holddown springs；10- pressure rings；11- throttling channels；12- first grooves；13- ring-shaped grooves；14- cylinder bottoms；15- is carried
The check valve of throttle orifice；16- first is into oil road；17- second is into oil road.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on attached drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
As shown in Figure 1, it is the illustrative examples of the hydraulic cylinder provided by the invention with pooling feature, in the signal
Property embodiment in, have pooling feature hydraulic cylinder include cylinder body 1, piston rod 2 and piston 3 are provided with cylinder body 1, piston rod
One end of 2 cylinder bottom 14 through piston 3 and close to cylinder body 1 is first end, and the other end of piston rod 2 is the second end.Piston
Locking nut 5 is provided with the first end of bar 2, piston 3 is arranged on the first end of piston rod 2, and will by locking nut 5
Piston 3 is locked with piston rod 2, further, between locking nut 5 and piston rod 2 holding screw 8 can also be set to be locked
Tightly.Centre bore is provided with the first end of piston rod 2, centre bore is arranged to stepped hole, and centre bore is close to the one of cylinder bottom 14
End is machined with internal thread.
As shown in Figure 1 and Figure 2, the hydraulic cylinder with pooling feature further includes buffer plunger 6, and buffer plunger 6 is hollow knot
Structure, i.e., be provided with axially extending bore in buffer plunger 6, one end of buffer plunger 6 is by the centrally disposed hole of limiting device, and energy
Enough to be moved back and forth in centre bore, the other end of buffer plunger 6 is close to cylinder bottom 14, and the first groove 12 with being set on cylinder bottom 14
Coaxially, i.e., on the same axis, first groove 12 connects set in cylinder bottom 14 first into oil road 16, is set on buffer plunger 6
At least one throttling channel 11 is equipped with, the width of throttling channel 11 is gradually reduced from piston 3 to the direction of cylinder bottom 14, and throttling channel 11 connects
The axially extending bore set in buffer plunger 6.
Buffer plunger 6 provided by the invention is hollow-core construction, and uniformly distributed several throttling channels 11 on its outer circumferential surface, throttling channel 11
Width be gradually reduced from piston 3 to the direction of cylinder bottom 14, corresponding, the orifice size of throttling channel 11 is from piston 3 to cylinder bottom 14
It is continuously reduced, therefore, during cylinder buffer, the compensator or trimmer pressure consecutive variations of rodless cavity fluid, avoid in the prior art
The pressure oscillation that interrupted pore area comes, makes buffer speed in buffering course gradually fall after rise, avoids velocity shock, enhance oil cylinder work
The stability of work, improves the efficiency and comfort of excavator operation.
In the illustrative examples for the hydraulic cylinder with pooling feature that the invention described above provides, on buffer plunger 6
Can be provided with least two throttling channels 11, each throttling channel 11 being arranged circumferentially along buffer plunger 6, further promote
The consecutive variations of compensator or trimmer pressure during cylinder buffer.
As shown in figure 4, one preferably or in alternative embodiment, throttling channel 11 can set structure triangular in shape, and close
One end of cylinder bottom 14 is the top on the top, i.e. triangular structure of triangular structure, and one end close to piston 3 is bottom, i.e. triangle
The base of shape structure.
In the illustrative examples for the hydraulic cylinder with pooling feature that the invention described above provides, to prevent bumper post
Plug 6 departs from the centre bore of piston rod 2, and limiting device can include collar stop 7 (as shown in Figure 6), during collar stop 7 is arranged on
In heart hole, external screw thread is provided with collar stop 7, with the screw-internal thread fit set in centre bore, collar stop 7 is connected by screw thread
Take over a job stopper rod 2, buffer plunger 6 is provided with the first step radially extended through collar stop 7 and close to one end of piston 3, leads to
The cooperation of first step and collar stop 7 is crossed, limitation buffer plunger 6 skids off centre bore.
Further, collar stop 7 is a strip, is clearance fit between collar stop 7 and buffer plunger 6, is formed
One section of longer annular space, during cylinder buffer, collar stop 7 can play the guiding role buffer plunger 6, while ring
Throttling buffering is played the role of in annular gap part between shape block 7 and buffer plunger 6, and the annular gap hole is in buffering with delaying
11 synergy of throttling channel on plunger 6 is rushed, improves buffering effect.
Preferably or in alternative embodiment, it can be provided between the bottom of the centre bore of buffer plunger 6 and piston rod 2 one
Resetting spring 4, one end of resetting spring 4 are contacted with the bottom of the centre bore of piston rod 2, the other end and buffering of resetting spring 4
The end contact of the first step of plunger 6.The rigidity of resetting spring 4 is smaller, and buffer plunger 6 is played reset role, is ensured in work
In 2 return stroke of stopper rod, buffer plunger 6 is in stretching state.
Buffer plunger 6 provided by the invention is spacing in centre bore by collar stop 7, and passes through resetting spring 4 and ring
Shape block 7 carries out spacing, and buffer plunger 6 is detachable structure, oil cylinder is had the hydraulic oil of pooling feature in use
Cylinder convenient disassembly, be easily changed, and piston rod 2 caused by avoiding buffer structure damage is all replaced, and reduces the maintenance of oil cylinder
Cost.
In the illustrative examples for the hydraulic cylinder with pooling feature that the invention described above provides, limiting device may be used also
With including pressure ring 10 (as shown in Figure 5), collar stop 7 is provided with several spring eyes (such as Fig. 6 institutes on the end face of cylinder bottom 14
Show), such as four spring eyes are set, holddown spring 9 (as shown in Figure 7) is respectively arranged with each spring eye, pressure ring 10 is ladder
Shape, the small size end of pressure ring 10 are arranged in the centre bore of piston rod 2, and the outer surface of the small size end of pressure ring 10 is provided with outer spiral shell
The screw-internal thread fit set in line, with the centre bore of piston rod 2, pressure ring 10 are connected through a screw thread piston rod 2, and pressure ring 10 is screwed into
In the centre bore of piston rod 2, the small size end of pressure ring 10 compresses holddown spring 9, and then compresses collar stop 7, pressure ring 10 it is big
Size end is located at outside the centre bore of piston rod 2, and is fitted closely with the end of piston rod 2.
In above-mentioned illustrative examples, collar stop 7 is compressed by holddown spring 9, holddown spring 9 is ensureing pressure ring 10
Large scale end face and piston rod 2 first end end face between while fit closely, locking work is played to pressure ring 10
With.
As shown in figure 5, one preferably or in alternative embodiment, the outer surface at the large scale end of pressure ring 10 can be arranged to six
Angular structure, easy to assemble.
In the illustrative examples for the hydraulic cylinder with pooling feature that the invention described above provides, buffer plunger 6 leans on
One end of nearly cylinder bottom 14 sets the oriented second step radially extended, and second step can be fully located in first groove 12.It is slow
During punching, the second step of buffer plunger 6 can be oriented to jointly completely into first groove 12 with collar stop 7, be ensured
Lateral deviation does not occur in buffering course for buffer plunger 6.
One preferably or in alternative embodiment, first groove 12 is circular groove.
In the illustrative examples for the hydraulic cylinder with pooling feature that the invention described above provides, surrounded on cylinder bottom 14
First groove 12 can be provided with a ring-shaped groove 13, and ring-shaped groove 13 connects be arranged in cylinder bottom 14 second into oil road
17, second into being provided with the check valve 15 (as shown in Figure 3) with throttle orifice on oil road 17.Further, second into fuel-displaced
Road 17 can connect first into oil road 16 by the damping hole on check valve 15.
One is set in the cylinder bottom 14 of hydraulic cylinder and carries the check valve 15 of throttle orifice, while one is opened up in cylinder bottom 14
Ring-shaped groove 13 so that active area when hydraulic cylinder is reversely opened after fluid opening check valve 15 in rodless cavity increases, and carries
High hydraulic cylinder reversely opens speed.
The course of work of one specific embodiment of the hydraulic cylinder with pooling feature that the invention described above provides is as follows.
In piston rod 2 into 14 operational process of cylinder bottom, oil cylinder rodless cavity fluid is communicated with first into oil road 16, at this time band
There is the check valve 15 of throttle orifice since spring effect is in reset state.
When piston rod 2 will run to end of travel when, first buffer plunger 6 contact cylinder bottom 14, second of buffer plunger 6
Rank enters in the first groove 12 on cylinder bottom 14, by collar stop 7 and the collective effect of 14 first groove 12 of cylinder bottom, ensures slow
Lateral deviation, which does not occur, for buffer plunger 6 during punching influences pooling feature.
Buffer plunger 6 contact cylinder bottom 14 after, oil cylinder rodless cavity fluid can not directly by first groove 12 enter first into
Oil road 16, but first is flowed into oil road 16 by the throttling channel 11 on buffer plunger 6, rodless cavity pressure rise, produces
With 2 direction of motion opposite effect power of piston rod, the speed of service of piston rod 2 is reduced, buffers fast response time, buffering effect is bright
It is aobvious.As piston rod 2 continues to move to cylinder bottom 14, the orifice size of throttling channel 11 is gradually reduced, and rodless cavity return flow is gradual
Reduce, 3 buffer speed of piston is gradually fallen after rise.
In buffering course a small amount of fluid of rodless cavity by annular gap longer between collar stop 7 and buffer plunger 6 with
And the throttle orifice in check valve 15 flows into first into oil road 16, prevents that buffering course rodless cavity compensator or trimmer pressure is excessive.
Pass through the annular gap between the uniformly distributed throttling channel 11 on above buffer plunger 6, collar stop 7 and buffer plunger 6
And the throttle orifice synergy in check valve 15, the buffer speed and compensator or trimmer pressure of balancing cylinder piston rod 2.
The orifice size of throttling channel 11 is continuously reduced in buffering course, oil cylinder rodless cavity fluid compensator or trimmer pressure consecutive variations,
The pressure oscillation that interrupted pore area comes is avoided, improves the efficiency and comfort of excavator operation.
When excavating Oil cylinder reverse starting (i.e. piston rod 2 stretches out), oil inlet part oil liquid stream enters the centre bore of piston rod 2
It is interior, act on centre bore bottom.Another part opens check valve 15 and flows into rodless cavity, passes through the ring-shaped groove set on cylinder bottom 14
13,5 end face of piston 3 and locking nut is acted on, adds the active area of fluid.Fluid collective effect accelerates oil cylinder at two
Reverse opening speed, improves excavator complete machine work efficiency.
Hydraulic cylinder provided by the invention with pooling feature can be applied to be had in excavator, crane, dynamic compaction machinery etc.
Have in the engineering machinery of hydraulic cylinder.
In the illustrative examples of excavator provided by the invention, excavator includes having in any of the above-described embodiment
The hydraulic cylinder of pooling feature.
In conclusion the hydraulic cylinder provided by the invention with pooling feature also at least has the advantages that：1)
The guarantee big chamber of digging machine oil cylinder compensator or trimmer pressure when into row buffering is continuous, no pressure fluctuation, avoids the velocity shock of oil cylinder, improves and dig
The stationarity of pick machine equipment and the comfort of operation；2) ensure that oil cylinder realizes reversely rapid unlatching, improve excavator operation
Efficiency；3) while ensure that big chamber buffer unit is readily disassembled, replaces digging machine oil cylinder in use, cushion performance is easy to tune
It is whole, while avoid the partial failure of piston rod buffer structure and cause cylinder piston rod to be replaced, reduce oil cylinder debugging, maintenance cost.
In the description of the present invention, it is to be understood that limit parts using the word such as " first ", " second ", only
It is for only for ease of and above-mentioned parts is distinguished, does not such as have Stated otherwise, above-mentioned word does not have particular meaning, therefore not
It is understood that as limiting the scope of the invention.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (10)
1. a kind of hydraulic cylinder with pooling feature, including cylinder body (1), the cylinder body (1) is interior to be provided with piston rod (2) and lives
Fill in (3), one end of cylinder bottom (14) of the piston rod (2) through the piston (3) and close to the cylinder body (1) is first end
Portion, it is characterised in that：Buffer plunger (6) is further included, centre bore is provided with the first end, the buffer plunger (6)
One end is arranged in the centre bore by limiting device, and can be moved back and forth in the centre bore, the buffer plunger
(6) the other end is close to the cylinder bottom (14), and the first groove (12) with being set on the cylinder bottom (14) is located at same axis
On, the first groove (12) connects set in the cylinder bottom (14) first into oil road (16), on the buffer plunger (6)
It is provided with least one throttling channel (11), the side of the width of the throttling channel (11) from the piston (3) to the cylinder bottom (14)
To being gradually reduced, the throttling channel (11) connects the axially extending bore set in the buffer plunger (6)；
The limiting device includes collar stop (7), and the collar stop (7) is arranged in the centre bore, and passes through screw thread
The piston rod (2) is connected, the buffer plunger (6) is through the collar stop (7) and close to one end of the piston (3)
The first step radially extended is provided with, by the cooperation of the first step and the collar stop (7), limits the buffering
Plunger (6) skids off the centre bore；
It is clearance fit between the collar stop (7) and the buffer plunger (6), forms annular gap.
2. there is the hydraulic cylinder of pooling feature as claimed in claim 1, it is characterised in that：Set on the buffer plunger (6)
It is equipped with least two throttling channels (11), each throttling channel (11) being arranged circumferentially along the buffer plunger (6).
3. there is the hydraulic cylinder of pooling feature as claimed in claim 1 or 2, it is characterised in that：The throttling channel (11) is in
Triangle, and the top close to one end of the cylinder bottom (14) for triangle, are triangle close to one end of the piston (3)
Base.
4. there is the hydraulic cylinder of pooling feature as claimed in claim 1, it is characterised in that：The limiting device further includes pressure
Ring (10), the collar stop (7) are provided with several spring eyes on the end face of the cylinder bottom (14), are set in the spring eye
Holddown spring (9) is equipped with, the pressure ring (10) is stepped, and the small size end of the pressure ring (10) is arranged on the centre bore
It is interior, and the piston rod (2) is connected through a screw thread, the small size end of the pressure ring (10) compresses the holddown spring (9), and then
Compress the collar stop (7), the large scale end of the pressure ring (10) is located at outside the centre bore, and with the piston rod (2)
End fit closely.
5. there is the hydraulic cylinder of pooling feature as claimed in claim 4, it is characterised in that：The large scale of the pressure ring (10)
The outer surface at end is arranged to hexgonal structure.
6. there is the hydraulic cylinder of pooling feature as claimed in claim 1, it is characterised in that：The buffer plunger (6) and institute
State and be provided with resetting spring (4) between the bottom of centre bore.
7. there is the hydraulic cylinder of pooling feature as claimed in claim 1, it is characterised in that：The buffer plunger (6) is close
One end of the cylinder bottom (14) sets the oriented second step radially extended, and during buffering, the second step can be completely into
In the first groove (12).
8. there is the hydraulic cylinder of pooling feature as claimed in claim 1, it is characterised in that：Institute is surrounded on the cylinder bottom (14)
State first groove (12) and be provided with a ring-shaped groove (13), ring-shaped groove (13) connection is arranged in the cylinder bottom (14)
Second into oil road (17), and described second into being provided with the check valve (15) with throttle orifice on oil road (17).
9. there is the hydraulic cylinder of pooling feature as claimed in claim 8, it is characterised in that：Described second into oil road (17)
Described first is connected into oil road (16) by the damping hole on the check valve (15).
A kind of 10. excavator, it is characterised in that：There is the hydraulic pressure of pooling feature including such as claim 1-9 any one of them
Oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510210063.4A CN106151160B (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with pooling feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510210063.4A CN106151160B (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with pooling feature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106151160A CN106151160A (en) | 2016-11-23 |
| CN106151160B true CN106151160B (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510210063.4A Active CN106151160B (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with pooling feature |
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| CN (1) | CN106151160B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035925A (en) * | 2017-12-04 | 2018-05-15 | 陕西航天动力高科技股份有限公司 | A kind of high reliability buffering throttling oil cylinder connection valve block assembly |
| CN108652916B8 (en) * | 2018-05-15 | 2020-04-21 | 暨南大学附属第一医院 | Knee joint exoskeleton |
| CN112555220A (en) * | 2019-09-10 | 2021-03-26 | 山东奥博控制技术有限公司 | Annular fixed throttle gap buffer device for hydraulic pressure |
| CN110469558A (en) * | 2019-09-18 | 2019-11-19 | 三一汽车起重机械有限公司 | Centering oil cylinder and crane with bidirectional buffering |
| CN112228424B (en) * | 2020-10-20 | 2022-08-12 | 山东金逸机械有限公司 | Hydraulic oil cylinder |
| CN114412885B (en) * | 2022-01-20 | 2022-12-27 | 中山大学·深圳 | Method and device for improving mechanical flexibility of hydraulic valve control cylinder system |
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