CN204805207U - Hydraulic cylinder and excavator with buffer function - Google Patents
Hydraulic cylinder and excavator with buffer function Download PDFInfo
- Publication number
- CN204805207U CN204805207U CN201520267368.4U CN201520267368U CN204805207U CN 204805207 U CN204805207 U CN 204805207U CN 201520267368 U CN201520267368 U CN 201520267368U CN 204805207 U CN204805207 U CN 204805207U
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- China
- Prior art keywords
- buffer plunger
- hydraulic jack
- cylinder bottom
- pooling feature
- groove
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- Withdrawn - After Issue
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- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a hydraulic cylinder and excavator with buffer function, wherein, the hydraulic cylinder who has buffer function includes the cylinder body, be provided with piston rod and piston in the cylinder body, the piston rod passes the piston, and the one end of being close to the cylinder bottom of cylinder body is the first end, the hydraulic cylinder who has buffer function still includes the buffer plunger, be provided with the centre bore in the first end, the one end of buffer plunger is passed through stop device and is set up in the centre bore, and can be in the centre bore reciprocating motion, the other end of buffer plunger is close to the cylinder bottom, and be located same axis with the first slot that sets up on the cylinder bottom, the first business turn over oil duct that sets up in the first slot intercommunication cylinder body, be provided with at least one throttling groove on the buffer plunger, the direction of width from the piston to the cylinder bottom of throttling groove reduces gradually, the axially extending bore who sets up in the throttling groove intercommunication buffer plunger. The utility model discloses can make the hydro -cylinder not have the pole chamber and cushion the in -process, fluid buffering pressure continuous variation, buffering speed falls after rise gradually, avoids speed to strike.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of hydraulic jack and the excavator with pooling feature.
Background technique
Hydraulic jack in excavator in the course of the work, piston needs to realize continuous to-and-fro motion, when piston rod is retracted to limit position, locking nut can produce great impact to cylinder bottom, causes digger operating device to run not steady, and cause the structural failure of hydraulic jack, therefore, damping device need be set in the rodless cavity of hydraulic jack, when moving to stroke end for preventing hydraulic jack, the locking nut of hydraulic jack and cylinder bottom generation mechanical collision, produce and impact and noise.At present, the rodless cavity buffer structure of excavator hydraulic cylinder mainly contains following two kinds of forms:
1) cushion at oil cylinder outer installment oil circuit and device; As at oil cylinder outer installment accumulator and hydraulic circuit, controlled the break-make of oil cylinder and accumulator by the break-make of Controlling solenoid valve, when oil cylinder is communicated with accumulator, hydraulic jack has buffer function.Above-mentioned mode of carrying out cushioning at oil cylinder outer installment accumulator and hydraulic circuit, has certain retardance in time, and make buffering speed of response slack-off, cushioning effect is not obvious.
2) specified structure is set in oil cylinder inside, realizes buffering by meter out.As in buffer structure, goed deep into by floating buffer plunger closing working connection in the oil duct on cylinder bottom, make buffer cavity fluid by the buffer regulating valve oil return at the bottom of oil cylinder, reach cushioning effect, this kind of matching requirements floating buffer plunger has higher machining accuracy, and requires high with the coaxality of cylinder bottom oil duct, floating buffer bar cannot dismounting and change, make shock-absorbing capacity be not easy to adjustment, piston rod buffer structure partial failure simultaneously can cause cylinder piston rod to be changed, and improves the maintenance cost of oil cylinder.And for example in plunger type cylinder damping device, carry out throttling buffering by the uniform damping hole on buffering spool, this kind of damping device is due to the effect of interrupted damping hole, and make compensator or trimmer pressure there is pressure surge, compensator or trimmer pressure continuity is poor.
Model utility content
The purpose of this utility model proposes a kind of hydraulic jack and excavator with pooling feature, and it can make oil cylinder rodless cavity in buffering course, and rodless cavity fluid compensator or trimmer pressure consecutive variations, buffer speed falls after rise gradually, avoids velocity shock.
For achieving the above object, the utility model provides a kind of hydraulic jack with pooling feature, it comprises cylinder body, piston rod and piston is provided with in described cylinder body, described piston rod is through described piston, and be first end near one end of the cylinder bottom of described cylinder body, the hydraulic jack with pooling feature also comprises buffer plunger, center hole is provided with in described first end, one end of described buffer plunger is arranged in described center hole by limit stoper, and can to-and-fro motion in described center hole, the other end of described buffer plunger is near described cylinder bottom, and with the first groove of arranging on described cylinder bottom on the same axis, described first groove is communicated with the first turnover oil duct arranged in described cylinder bottom, described buffer plunger is provided with at least one throttling groove, the width of described throttling groove reduces gradually from described piston to the direction of described cylinder bottom, described throttling groove is communicated with the axial hole arranged in described buffer plunger.
In above-described embodiment, buffer plunger is arranged to hollow-core construction, and buffer plunger arranges throttling groove, the direction of width from piston to cylinder bottom of throttling groove reduces gradually, corresponding, the direction of orifice size from piston to cylinder bottom reduces continuously, in cylinder buffer process, oil cylinder rodless cavity fluid compensator or trimmer pressure consecutive variations, buffer speed falls after rise gradually, avoid pressure surge and velocity shock, improve operating efficiency and travelling comfort.
One preferably or in embodiment, described buffer plunger is provided with at least two described throttling grooves, each described throttling groove is evenly arranged along the circumference of described buffer plunger, further promotes the consecutive variations of oil cylinder rodless cavity fluid compensator or trimmer pressure.
One preferably or in embodiment, described throttling groove is triangular in shape, and being leg-of-mutton top near one end of described cylinder bottom, is leg-of-mutton base near one end of described piston.
One preferably or in embodiment, described limit stoper comprises collar stop, described collar stop is arranged in described center hole, and be threaded connection described piston rod, described buffer plunger is provided with the radial first step extended through described collar stop and near one end of described piston, by coordinating of described first step and described collar stop, limit described buffer plunger and skid off described center hole.
In above-described embodiment; collar stop play the guiding role to buffer plunger in buffering course; guarantee the accurate centering of buffer plunger and the first groove; buffer plunger is set to demountable structure; be easy to dismounting, change; avoiding buffer structure damage causes piston rod all to be changed, and reduces the maintenance cost of oil cylinder.
Preferably or in embodiment, be Spielpassung one between described collar stop and described buffer plunger.
In above-described embodiment, the annular space between collar stop with buffer plunger can coordinate with the throttling groove on buffer plunger at buffer stage, equalizing and buffering surge pressure and buffer speed.
One preferably or in embodiment, described limit stoper also comprises pressure ring, described collar stop is provided with several spring eye on the end face of described cylinder bottom, holddown spring is provided with in described spring eye, described pressure ring is stepped, the small size end of described pressure ring is arranged in described center hole, and be threaded connection described piston rod, the tight described holddown spring of small size side pressure of described pressure ring, and then compress described collar stop, the large scale end of described pressure ring is positioned at outside described center hole, and fits tightly with the end of described piston rod.
In above-described embodiment, pressure ring is arranged to the screw-internal thread fit of the center hole of external thread structure and piston rod, is convenient to pressure ring and is compressed by collar stop by holddown spring, holddown spring can reduce pressure ring machining accuracy, plays locking effect to pressure ring simultaneously.
One preferably or in embodiment, the outer surface of the large scale end of described pressure ring is arranged to hexgonal structure, structure is simple, is easy to assembling.
Preferably or in embodiment, between the bottom of described buffer plunger and described center hole, Returnning spring is provided with one.
In above-described embodiment, Returnning spring is installed on the bottom of the center hole of piston rod, buffer plunger is played reset role, buffer cavity compensator or trimmer pressure can be avoided to cause damage to Returnning spring simultaneously, improve the working life of Returnning spring.
One preferably or in embodiment, described buffer plunger is provided with the second step extended to radial direction near one end of described cylinder bottom, during buffering, described second step can enter in described first groove completely.
In above-described embodiment, during buffering, the second step of buffer plunger enters in the first groove, and the first groove and collar stop play the guiding role jointly, make buffer plunger lateral deviation not occur in buffering course, improve the reliability of buffer structure.
One preferably or in embodiment, described cylinder bottom is provided with an annular groove around described first groove, and described annular groove is communicated with the second turnover oil duct be arranged in described cylinder bottom, described second turnover oil duct is provided with the one-way valve with throttle orifice.
In above-described embodiment, cylinder bottom is provided with the one-way valve of band throttle orifice, prevents the excessive destruction of causing cylinder structure of oil cylinder buffering end pressure in piston rod buffering course.
One preferably or in embodiment, described second turnover oil duct is communicated with described first turnover oil duct by the damping hole on described one-way valve.
In above-described embodiment, offer an annular groove at cylinder bottom, increase fluid when oil cylinder is oppositely opened and open active area at rodless cavity after one-way valve, make oil cylinder realize oppositely opening rapidly, improve working efficiency.
Preferably or in embodiment one, the described first end of described piston rod being provided with locking nut, by arranging described locking nut, described piston and described piston rod being locked.
For achieving the above object, the utility model additionally provides a kind of excavator, and it comprises the hydraulic jack with pooling feature in above-mentioned any embodiment.
Based on technique scheme, the utility model also at least has following beneficial effect:
The buffer plunger that the utility model provides is hollow-core construction, and uniform several throttling groove on its outer circumferential face, the direction of width from piston to cylinder bottom of throttling groove reduces gradually, and the orifice size of throttling groove reduces continuously, therefore, in oil cylinder rodless cavity buffering course, the compensator or trimmer pressure consecutive variations of rodless cavity fluid, avoids pressure surge, and buffer speed in buffering course is fallen after rise gradually, avoid velocity shock, enhance the stability of cylinder efficient.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
The structural representation with the hydraulic jack of pooling feature that Fig. 1 provides for the utility model;
The close-up schematic view with the hydraulic jack of pooling feature that Fig. 2 provides for the utility model;
The enlarged diagram with the one-way valve with throttle orifice in the hydraulic jack of pooling feature that Fig. 3 provides for the utility model;
The buffer plunger structural representation had in the hydraulic jack of pooling feature that Fig. 4 provides for the utility model;
The block end-face structure schematic diagram had in the hydraulic jack of pooling feature that Fig. 5 provides for the utility model;
The pressure ring end-face structure schematic diagram had in the hydraulic jack of pooling feature that Fig. 6 provides for the utility model;
What Fig. 7 provided for the utility model has pressure ring in the hydraulic jack of pooling feature and block contact position close-up schematic view.
Attached number in the figure:
1-cylinder body; 2-piston rod; 3-piston; 4-Returnning spring; 5-locking nut; 6-buffer plunger; 7-collar stop; 8-Cock screw; 9-holddown spring; 10-pressure ring; 11-throttling groove; 12-first groove; 13-annular groove; 14-cylinder bottom; 15-is with the one-way valve of throttle orifice; 16-first passes in and out oil duct; 17-second passes in and out oil duct.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in embodiment is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore the restriction to the utility model protection domain can not be interpreted as.
As shown in Figure 1, for the illustrative examples with the hydraulic jack of pooling feature that the utility model provides, in this illustrative examples, the hydraulic jack with pooling feature comprises cylinder body 1, piston rod 2 and piston 3 is provided with in cylinder body 1, piston rod 2 is first end through piston 3 and near one end of the cylinder bottom 14 of cylinder body 1, and the other end of piston rod 2 is the second end.The first end of piston rod 2 is provided with locking nut 5, piston 3 is arranged on the first end of piston rod 2, and by locking nut 5, piston 3 and piston rod 2 are locked, further, Cock screw 8 can also be set between locking nut 5 and piston rod 2 and lock.Be provided with center hole in the first end of piston rod 2, center hole is set to shoulder hole, and center hole is processed with internal thread near one end of cylinder bottom 14.
As Fig. 1, shown in Fig. 2, the hydraulic jack with pooling feature also comprises buffer plunger 6, buffer plunger 6 is hollow structure, namely axial hole is provided with in buffer plunger 6, one end of buffer plunger 6 is arranged in center hole by limit stoper, and can to-and-fro motion in center hole, the other end of buffer plunger 6 is near cylinder bottom 14, and it is coaxial with the first groove 12 of arranging on cylinder bottom 14, namely on the same axis, first groove 12 is communicated with the first turnover oil duct 16 arranged in cylinder bottom 14, buffer plunger 6 is provided with at least one throttling groove 11, the width of throttling groove 11 reduces gradually from piston 3 to the direction of cylinder bottom 14, throttling groove 11 is communicated with the axial hole arranged in buffer plunger 6.
The buffer plunger 6 that the utility model provides is hollow-core construction, and uniform several throttling groove 11 on its outer circumferential face, the width of throttling groove 11 reduces gradually from piston 3 to the direction of cylinder bottom 14, corresponding, the orifice size of throttling groove 11 reduces from piston 3 continuously to cylinder bottom 14, therefore, in cylinder buffer process, the compensator or trimmer pressure consecutive variations of rodless cavity fluid, avoid the pressure surge that in prior art, interrupted pore area comes, buffer speed in buffering course is fallen after rise gradually, avoid velocity shock, enhance the stability of cylinder efficient, improve efficiency and the travelling comfort of excavator operation.
What provide at above-mentioned the utility model has in the illustrative examples of the hydraulic jack of pooling feature, buffer plunger 6 can be provided with at least two throttling grooves 11, each throttling groove 11 can be evenly arranged along the circumference of buffer plunger 6, further promotes the consecutive variations of compensator or trimmer pressure in cylinder buffer process.
As shown in Figure 4, one preferably or in embodiment, throttling groove 11 can arrange structure triangular in shape, and be the top of triangular structure near one end of cylinder bottom 14, i.e. the top of triangular structure is bottom near one end of piston 3, i.e. the base of triangular structure.
What provide at above-mentioned the utility model has in the illustrative examples of the hydraulic jack of pooling feature, for the center hole preventing buffer plunger 6 from departing from piston rod 2, limit stoper can comprise collar stop 7 (as shown in Figure 6), collar stop 7 is arranged in center hole, collar stop 7 is provided with outside thread, with the screw-internal thread fit arranged in center hole, collar stop 7 is threaded connection piston rod 2, buffer plunger 6 is through collar stop 7, and one end of piston 3 is provided with the radial first step extended, by coordinating of first step and collar stop 7, restriction buffer plunger 6 skids off center hole.
Further, collar stop 7 is a long strip, it is Spielpassung between collar stop 7 and buffer plunger 6, form the annular space of a section longer, in cylinder buffer process, collar stop 7 can play the guiding role to buffer plunger 6, and the annular space part simultaneously between collar stop 7 and buffer plunger 6 plays throttling buffering effect, throttling groove 11 synergy of this hole, annular space when cushioning and on buffer plunger 6, improves cushioning effect.
One preferably or in embodiment, Returnning spring 4 can be provided with between the bottom of the center hole of buffer plunger 6 and piston rod 2, one end of Returnning spring 4 contacts with the bottom of the center hole of piston rod 2, the end contact of the other end of Returnning spring 4 and the first step of buffer plunger 6.The rigidity of Returnning spring 4 is less, plays reset role buffer plunger 6, ensures that buffer plunger 6 is in the state of stretching out in piston rod 2 return stroke.
The buffer plunger 6 that the utility model provides is spacing in center hole by collar stop 7, and undertaken spacing by Returnning spring 4 and collar stop 7, buffer plunger 6 is demountable structure, make oil cylinder in use have pooling feature hydraulic jack convenient disassembly, be easy to change, avoid buffer structure to damage the piston rod 2 caused and all change, reduce the maintenance cost of oil cylinder.
What provide at above-mentioned the utility model has in the illustrative examples of the hydraulic jack of pooling feature, limit stoper can also comprise pressure ring 10 (as shown in Figure 5), collar stop 7 is provided with several spring eye (as shown in Figure 6) on the end face of cylinder bottom 14, four spring eyes are such as set, holddown spring 9 (as shown in Figure 7) is respectively arranged with in each spring eye, pressure ring 10 is stepped, the small size end of pressure ring 10 is arranged in the center hole of piston rod 2, the outer surface of the small size end of pressure ring 10 is provided with outside thread, with the screw-internal thread fit arranged in the center hole of piston rod 2, pressure ring 10 is threaded connection piston rod 2, pressure ring 10 is screwed in the center hole of piston rod 2, the tight holddown spring 9 of small size side pressure of pressure ring 10, and then compress collar stop 7, the large scale end of pressure ring 10 is positioned at outside the center hole of piston rod 2, and fit tightly with the end of piston rod 2.
In above-mentioned illustrative examples, compressed by collar stop 7 by holddown spring 9, holddown spring 9 plays locking effect to pressure ring 10 while fitting tightly between the guarantee large scale end face of pressure ring 10 and the end face of the first end of piston rod 2.
As shown in Figure 5, one preferably or in embodiment, the outer surface of the large scale end of pressure ring 10 can be arranged to hexgonal structure, assembling is convenient to.
What provide at above-mentioned the utility model has in the illustrative examples of the hydraulic jack of pooling feature, and buffer plunger 6 is provided with the second step extended to radial direction near one end of cylinder bottom 14, second step can be positioned at the first groove 12 completely.In buffering course, the second step of buffer plunger 6 can enter in the first groove 12 completely, jointly leads with collar stop 7, ensures that buffer plunger 6 lateral deviation does not occur in buffering course.
One preferably or in embodiment, the first groove 12 is circular groove.
What provide at above-mentioned the utility model has in the illustrative examples of the hydraulic jack of pooling feature, cylinder bottom 14 can be provided with an annular groove 13 around the first groove 12, annular groove 13 is communicated with the second turnover oil duct 17, second be arranged in cylinder bottom 14 and passes in and out the one-way valve 15 (as shown in Figure 3) oil duct 17 is provided with throttle orifice.Further, the second turnover oil duct 17 can be communicated with the first turnover oil duct 16 by the damping hole on one-way valve 15.
An one-way valve 15 with throttle orifice is set in the cylinder bottom 14 of hydraulic jack, offer an annular groove 13 at cylinder bottom 14 simultaneously, increase at the active area of rodless cavity after fluid opens one-way valve 15 when hydraulic jack is oppositely opened, improve hydraulic jack and oppositely open speed.
The working procedure of what above-mentioned the utility model provided a have specific embodiment of the hydraulic jack of pooling feature is as follows.
At piston rod 2 in cylinder bottom 14 running, oil cylinder rodless cavity fluid and first passes in and out oil duct 16 and communicates, and the one-way valve 15 now with throttle orifice is in reset mode due to spring action.
When piston rod 2 will move to end of travel, first buffer plunger 6 contacts cylinder bottom 14, the second step of buffer plunger 6 enters in the first groove 12 on cylinder bottom 14, by the acting in conjunction of collar stop 7 with cylinder bottom 14 first groove 12, in guarantee buffering course, lateral deviation does not occur buffer plunger 6 affects pooling feature.
After buffer plunger 6 contacts cylinder bottom 14, oil cylinder rodless cavity fluid directly cannot enter the first turnover oil duct 16 by the first groove 12, but flow into the first turnover oil duct 16 by the throttling groove 11 on buffer plunger 6, rodless cavity pressure raises, produce and piston rod 2 moving direction opposite effect power, reduce the motion speed of piston rod 2, buffering fast response time, cushioning effect is obvious.Along with piston rod 2 continues to move to cylinder bottom 14, the orifice size of throttling groove 11 reduces gradually, and rodless cavity oil return flow reduces gradually, and piston 3 buffer speed falls after rise gradually.
In buffering course, a small amount of fluid of rodless cavity flows into first by the throttle orifice in annular space longer between collar stop 7 and buffer plunger 6 and one-way valve 15 and passes in and out oil duct 16, prevents buffering course rodless cavity compensator or trimmer pressure excessive.
By the uniform throttling groove 11 on above buffer plunger 6, the annular space between collar stop 7 and buffer plunger 6 and the throttle orifice synergy in one-way valve 15, the buffer speed of balancing cylinder piston rod 2 and compensator or trimmer pressure.
In buffering course, the orifice size of throttling groove 11 reduces continuously, oil cylinder rodless cavity fluid compensator or trimmer pressure consecutive variations, avoids the pressure surge that interrupted pore area comes, and improves efficiency and the travelling comfort of excavator operation.
Time excavator oil cylinder reverse starting (namely piston rod 2 stretches out), filler opening part fluid flows in the center hole of piston rod 2, acts on bottom center hole.Another part is opened one-way valve 15 and is flowed into rodless cavity, by the annular groove 13 that cylinder bottom 14 is arranged, acts on piston 3 and locking nut 5 end face, adds the active area of fluid.Two place's fluid actings in conjunction accelerate the reverse opening speed of oil cylinder, improve excavator complete machine working efficiency.
The hydraulic jack of what the utility model provided have pooling feature can be applied in excavator, hoist, dynamic compaction machinery etc. to be had in the engineering machinery of hydraulic jack.
In the illustrative examples of the excavator provided at the utility model, excavator comprises the hydraulic jack with pooling feature in above-mentioned any embodiment.
In sum, the hydraulic jack of what the utility model provided have pooling feature also at least has following beneficial effect: 1) ensure the large chamber of digging machine oil cylinder when cushioning compensator or trimmer pressure continuously, without pressure surge, avoid the velocity shock of oil cylinder, improve the stationarity of digger operating device and the travelling comfort of operation; 2) ensure that oil cylinder realizes oppositely opening rapidly, improve the efficiency of excavator operation; 3) ensure simultaneously digging machine oil cylinder in use large chamber damping device be easy to dismounting, change, shock-absorbing capacity is convenient to adjustment, avoids the partial failure of piston rod buffer structure simultaneously and causes cylinder piston rod to be changed, reduces that oil cylinder is debugged, maintenance cost.
In description of the present utility model; it will be appreciated that; the word such as " first ", " second " is used to limit component; be only used to be convenient to distinguish above-mentioned parts; as there is no Stated otherwise; above-mentioned word does not have particular meaning, therefore can not be interpreted as the restriction to the utility model protection domain.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (12)
1. one kind has the hydraulic jack of pooling feature, comprise cylinder body (1), piston rod (2) and piston (3) is provided with in described cylinder body (1), described piston rod (2) is through described piston (3), and be first end near one end of the cylinder bottom (14) of described cylinder body (1), it is characterized in that: also comprise buffer plunger (6), center hole is provided with in described first end, one end of described buffer plunger (6) is arranged in described center hole by limit stoper, and can to-and-fro motion in described center hole, the other end of described buffer plunger (6) is near described cylinder bottom (14), and be positioned on same axis with upper the first groove (12) arranged of described cylinder bottom (14), described first groove (12) is communicated with the first turnover oil duct (16) arranged in described cylinder bottom (14), described buffer plunger (6) is provided with at least one throttling groove (11), the width of described throttling groove (11) reduces gradually from described piston (3) to the direction of described cylinder bottom (14), described throttling groove (11) is communicated with the axial hole arranged in described buffer plunger (6).
2. there is the hydraulic jack of pooling feature as claimed in claim 1, it is characterized in that: described buffer plunger (6) is provided with at least two described throttling grooves (11), each described throttling groove (11) is evenly arranged along the circumference of described buffer plunger (6).
3. there is the hydraulic jack of pooling feature as claimed in claim 1 or 2, it is characterized in that: described throttling groove (11) is triangular in shape, and be leg-of-mutton top near one end of described cylinder bottom (14), be leg-of-mutton base near one end of described piston (3).
4. there is the hydraulic jack of pooling feature as claimed in claim 1, it is characterized in that: described limit stoper comprises collar stop (7), described collar stop (7) is arranged in described center hole, and be threaded connection described piston rod (2), described buffer plunger (6) is provided with the radial first step extended through described collar stop (7) and near one end of described piston (3), by coordinating of described first step and described collar stop (7), limit described buffer plunger (6) and skid off described center hole.
5. there is the hydraulic jack of pooling feature as claimed in claim 4, it is characterized in that: be Spielpassung between described collar stop (7) and described buffer plunger (6).
6. there is the hydraulic jack of pooling feature as claimed in claim 4, it is characterized in that: described limit stoper also comprises pressure ring (10), described collar stop (7) is provided with several spring eye on the end face of described cylinder bottom (14), holddown spring (9) is provided with in described spring eye, described pressure ring (10) is for stepped, the small size end of described pressure ring (10) is arranged in described center hole, and be threaded connection described piston rod (2), the tight described holddown spring (9) of small size side pressure of described pressure ring (10), and then compress described collar stop (7), the large scale end of described pressure ring (10) is positioned at outside described center hole, and fit tightly with the end of described piston rod (2).
7. there is the hydraulic jack of pooling feature as claimed in claim 6, it is characterized in that: the outer surface of the large scale end of described pressure ring (10) is arranged to hexgonal structure.
8. there is the hydraulic jack of pooling feature as claimed in claim 4, it is characterized in that: between described buffer plunger (6) and the bottom of described center hole, be provided with Returnning spring (4).
9. the hydraulic jack with pooling feature as described in claim 1 or 4, it is characterized in that: described buffer plunger (6) is provided with the second step extended to radial direction near one end of described cylinder bottom (14), during buffering, described second step can enter in described first groove (12) completely.
10. there is the hydraulic jack of pooling feature as claimed in claim 1, it is characterized in that: described cylinder bottom (14) is provided with an annular groove (13) around described first groove (12), described annular groove (13) is communicated with the second turnover oil duct (17) be arranged in described cylinder bottom (14), described second turnover oil duct (17) is provided with the one-way valve (15) with throttle orifice.
11. hydraulic jacks as claimed in claim 10 with pooling feature, is characterized in that: described second turnover oil duct (17) is communicated with described first turnover oil duct (16) by the damping hole on described one-way valve (15).
12. 1 kinds of excavators, is characterized in that: comprise the hydraulic jack with pooling feature as described in any one of claim 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520267368.4U CN204805207U (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520267368.4U CN204805207U (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204805207U true CN204805207U (en) | 2015-11-25 |
Family
ID=54590041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520267368.4U Withdrawn - After Issue CN204805207U (en) | 2015-04-28 | 2015-04-28 | Hydraulic cylinder and excavator with buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204805207U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN106907369A (en) * | 2017-04-19 | 2017-06-30 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
-
2015
- 2015-04-28 CN CN201520267368.4U patent/CN204805207U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN106151160B (en) * | 2015-04-28 | 2018-05-01 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder and excavator with pooling feature |
| CN106907369A (en) * | 2017-04-19 | 2017-06-30 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
| CN106907369B (en) * | 2017-04-19 | 2019-03-08 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
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