CN102705294B - A kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder - Google Patents
A kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder Download PDFInfo
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- CN102705294B CN102705294B CN201210211969.4A CN201210211969A CN102705294B CN 102705294 B CN102705294 B CN 102705294B CN 201210211969 A CN201210211969 A CN 201210211969A CN 102705294 B CN102705294 B CN 102705294B
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- piston rod
- buffer area
- oil cylinder
- cylinder barrel
- cavity
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Abstract
The invention discloses a kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder, belong to technical field of hydraulic oil cylinder.Described oil cylinder comprises piston rod, cylinder barrel and piston, piston is fixing on the piston rod, wherein, cylinder barrel end is provided with cylinder barrel end cap, piston rod is provided with between piston and piston rod end the first buffer area and the second buffer area, first buffer area is away from direction, piston rod end, first buffer area is provided with the groove that many are distributed in piston rod surface vertically, depth of groove is along deepening gradually to cylinder barrel end cap direction, cylinder barrel end cap is provided with and the first buffer area, the first cavity that second buffer area matches and the second cavity, cylinder barrel end cap is also provided with the hydraulic fluid port be connected with cavity.The present invention by being provided with the first buffer area and two, the second buffer area damping device in rodless cavity, and adopts piston rod and damping device integrated design, and not only cylinder structure is more simple, and cushioning effect is better, extends oil cylinder working life.
Description
Technical field
The present invention relates to technical field of hydraulic oil cylinder, particularly a kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder.
Background technique
Hydraulic jack is widely used parts in engineering machinery, is a kind of conventional straight line moving type executive component in hydraulic system.In cylinder efficient process, piston needs continuous to-and-fro motion, and when piston rod stretches out or be retracted into limit position, piston end surface can produce very large impact to end cap and bottom surface, create very large inertial force and impulsive load, the damage of hydraulic jack may be caused.In order to protect for the purpose of oil cylinder and safety, oil cylinder inside needs to arrange damping device, the stability of machine work during to ensure that oil cylinder runs to end of travel.Existing Cylinders of Construction Machinery rodless cavity is generally all provided with a set of damping device.
As shown in Figure 1, the high-voltage oil cylinder being provided with damping device in current rodless cavity mainly comprises cylinder barrel 20, piston rod 21 and piston 22, and as shown in Figure 1, piston 22 is fixed on the first end of piston rod 21.Piston 22 through piston 22, and is anchored on the first end of piston rod 21 by the first end of piston rod 21 by locking nut 23.The end face of the first end of piston rod 21 is provided with blind hole 30, in blind hole 30, is provided with Cylinder Surface pin 25.Cushion hole 26 is provided with bottom cylinder barrel.The end away from piston one end of Cylinder Surface pin 25 is set to taper, and the axial section of taper is parabola.Bottom cylinder barrel 20, be also provided with the throttle orifice 28 communicated with cushion hole 26, in throttle orifice 28, be provided with one-way throttle valve 27.The hydraulic fluid port 29 communicated with cushion hole 26 is also provided with bottom cylinder barrel 20.This high-voltage oil cylinder can realize throttling gradually and alleviate piston to the impact of cylinder barrel, and can reduce breakout pressure when oil cylinder starts.
But also there is following problem in current hydraulic jack, the structure of oil cylinder is comparatively complicated, and cushioning effect is poor, and the requirement of the cushioning effect of oil cylinder to taper is higher, because the whole buffering course of oil cylinder will come by taper, also higher to the processing request of taper.
Summary of the invention
In order to solve current high-voltage oil cylinder complex structure, cushioning effect difference and the problem higher to the processing request of taper in oil cylinder, now provide a kind of high-voltage oil cylinder.Concrete technological scheme is as follows:
The high-voltage oil cylinder of damping device is provided with in a kind of rodless cavity, described high-voltage oil cylinder comprises piston rod, cylinder barrel and piston, described piston is fixed on described piston rod, wherein, described cylinder barrel end is provided with cylinder barrel end cap, described piston rod is provided with the first buffer area and the second buffer area between described piston and described piston rod end, described first buffer area is away from direction, described piston rod end, described first buffer area is provided with the groove that many are distributed in described piston rod surface vertically, described depth of groove is along deepening gradually to described cylinder barrel end cap direction, described cylinder barrel end cap is provided with and described first buffer area, the first cavity that described second buffer area matches and the second cavity, described cylinder barrel end cap is also provided with the hydraulic fluid port be connected with described cavity.
Preferably, buffering spill port and oil inlet hole is provided with in described second buffer area, described oil inlet hole radially runs through described piston rod, and described buffering spill port to set and be connected with described spill port, is provided with one-way valve in described buffering spill port from described piston rod end face along described piston rod.
Preferably, described second buffer area is provided with many compensating grooves being distributed in described piston rod surface vertically or along the circumferentially uniform throttling groove of described piston rod, described compensating groove or throttling groove are along deepening gradually to described cylinder barrel end cap direction.
Preferably, described second Buffer Design is cylndrical surface.
Preferably, described groove is parallel to each other and spacing is equal.
Preferably, described hydraulic fluid port is connected with described first cavity.
Preferably, described first buffer area diameter of piston rod is greater than described second buffer area diameter of piston rod.
Preferably, described second buffer area and described second cavity fit system are Spielpassung.
Preferably, the described one-way valve spring device for screwing up that comprises steel ball, the holddown spring be connected with described steel ball and be connected with described holddown spring.
A kind of excavator, described excavator is provided with the high-voltage oil cylinder described in above-mentioned any one.
Compared with prior art, the high-voltage oil cylinder provided in technique scheme and the excavator comprising this oil cylinder have the following advantages: by being provided with the first buffer area and two, the second buffer area damping device in rodless cavity, and adopt piston rod and damping device integrated design, not only cylinder structure is simpler, and cushioning effect is better, extend oil cylinder working life.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is prior art high-voltage oil cylinder structural representation;
Fig. 2 is the high-voltage oil cylinder piston rod construction schematic diagram provided in the embodiment of the present invention;
Fig. 3 is the high-voltage oil cylinder cylinder barrel assembly structure schematic diagram provided in the embodiment of the present invention;
Fig. 4 is the high-voltage oil cylinder structural representation provided in the embodiment of the present invention;
Fig. 5 is the high-voltage oil cylinder buffering course schematic diagram provided in the embodiment of the present invention;
Fig. 6 is that the high-voltage oil cylinder piston provided in the embodiment of the present invention stretches out process schematic.
In accompanying drawing, the component list representated by each label is as follows:
1 piston rod, 2 cylinder barrels, 3 pistons, 4 cylinder barrel end caps, 5 first buffer areas, 6 second buffer areas, 7 grooves, 8 first cavitys, 9 second cavitys, 10 hydraulic fluid ports, 11 oil inlet holes, 12 buffering spill ports, 13 one-way valves, 131 steel balls, 132 holddown springs, 133 spring device for screwing up, 14 low-pressure hydraulic oils, 15 high pressure liquid force feeds, 20 cylinder barrels, 21 piston rods, 22 pistons, 23 locking nuts, 25 Cylinder Surface pins, 26 cushion holes, 27 one-way throttle valves, 28 throttle orifices, 29 hydraulic fluid ports, 30 blind holes.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
As shown in Figures 2 to 4, embodiments provide a kind of high-voltage oil cylinder, comprise piston rod 1, cylinder barrel 2 and piston 3, piston 3 is fixed on piston rod 1, wherein, cylinder barrel 2 end is provided with cylinder barrel end cap 4, piston rod 1 is provided with between piston 3 and piston rod 1 end the first buffer area 5 and the second buffer area 6, first buffer area 5 is away from piston rod 1 end direction, first buffer area 5 is provided with the groove 7 that many are distributed in piston rod 1 surface vertically, groove 7 degree of depth is along deepening gradually to cylinder barrel end cap 4 direction, and groove 7 is parallel to each other and spacing is equal.Cylinder barrel end cap 4 is provided with the first cavity 8 and the second cavity 9 matched with the first buffer area 6, buffer area 5, second, and cylinder barrel end cap 4 is also provided with the hydraulic fluid port 10 be connected with the first cavity 8.When piston rod 1 moves to bottom cylinder barrel 2, the first buffer area 5 enters the first cavity 8 cooperation and realizes variable throttling, after the first buffer area 5 enters the first cavity 8, amount of restriction becomes large gradually, piston 3 movement velocity reduces gradually, under the second damping device coordinates, makes buffering course comparatively steady.
Be provided with buffering spill port 12 and oil inlet hole 11 in second buffer area 6, spill port 11 radially runs through piston rod 1, and buffering oil inlet hole 12 is axially set and be connected with spill port 11 from piston rod 1 end face along piston rod 1, is provided with one-way valve 13 in buffering oil inlet hole 12.The spring device for screwing up 133 that one-way valve 13 comprises steel ball 131, the holddown spring 132 be connected with steel ball 131 and is connected with holddown spring 132.Cushion hole 12 is coaxial with piston 3, and the axis of hydraulic fluid port 10 is parallel with spill port 11.
In addition, the second buffer area 6 also can be designed as to be had many and is distributed in the compensating groove on piston rod 1 surface vertically or has along the circumferentially uniform throttling groove of piston rod 1, and wherein compensating groove or throttling groove are along deepening gradually to cylinder barrel end cap 4 direction.Meanwhile, the second buffer area 6 also can be designed to the structure with cylndrical surface.
First buffer area 5 diameter of piston rod is greater than the second buffer area 6 diameter of piston rod.Second buffer area 6 and the second cavity 9 fit system are Spielpassung, amount of restriction when controlling throttling is adjusted by the second buffer area 6 and the second cavity 9 Spielpassung, auxiliary first buffer area 5 adjusts the speed that oil cylinder slows down further, better alleviates the collision of piston 3 and cylinder barrel end cap 4.
The working principle of the embodiment of the present invention is simply described below.
As shown in Figure 5, when cylinder piston rod 1 bounces back, hydraulic oil promotes piston 3 and moves, rodless cavity hydraulic oil is that low pressure oil enters fuel tank 15 times, along with piston 3 continues to run when entering buffer area, at this moment on piston rod 1, the first cavity 8 on cylinder barrel end cap is inserted in the first buffer area 5, on piston rod, cylinder barrel end cap second cavity 9 is inserted in the second buffer area 6, the groove 7 that wherein the first buffer area 5 is progressively deepened by throttle part on piston rod forms at piston and end cap first cavity 8 front end the hyperbaric chamber raised gradually, progressively slow down motion speed, cushions, second 6, buffer area is by piston rod 3 and cylinder cover 4 Spielpassung between the two, play certain damping function and carry out auxiliary first buffer area 5 reducing speed, alleviate the high pressure that the first buffer area 5 is formed, sealing system on protection piston, after completing buffering course, during oil cylinder rodless cavity oil-feed, as shown in Figure 6, at this moment high pressure liquid force feed 14 enters from hydraulic fluid port, part high pressure liquid force feed 14 promotes front end, piston rod first buffer area, a part of high pressure liquid force feed 14 enters in buffering oil inlet hole 12 by spill port on piston rod 11 in addition, push steel ball 131 further open and be full of rapidly the second cavity 9 through one-way valve 13, piston 3 reverse starting, start quickly speed, piston 3 can not be started slowly or the phenomenon of difficulty in starting because thrust deficiency produces.
The embodiment of the invention also discloses a kind of excavator, this excavator is provided with high-voltage oil cylinder described above.The other parts of excavator with reference to prior art, can not repeat at this.
The buffer structure that high-voltage oil cylinder disclosed in the embodiment of the present invention and the excavator comprising this oil cylinder are adopted by design comprises the first buffer area and the second buffer area, during buffering, two buffer area actings in conjunction realize buffering, good buffer effect, and can effectively reduce rodless cavity compensator or trimmer pressure, prevent from cushioning the high temperature, the high pressure that produce instantaneously and damage piston sealing system, extend oil cylinder working life; Piston rod and damping device are designed to integration in addition, and make structure more simple, cushioning effect is better, also can reduce breakout pressure when oil cylinder starts better simultaneously.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a high-voltage oil cylinder, comprise piston rod (1), cylinder barrel (2) and piston (3), described piston (3) is fixed on described piston rod (1), it is characterized in that, described cylinder barrel (2) end is provided with cylinder barrel end cap (4), described piston rod (1) is provided with the first buffer area (5) and the second buffer area (6) between described piston (3) and described piston rod (1) end, described first buffer area (5) is away from described piston rod (1) end direction, described first buffer area (5) is provided with the groove (7) that many are distributed in described piston rod (1) surface vertically, described groove (7) degree of depth is along deepening gradually to described cylinder barrel end cap (4) direction, described cylinder barrel end cap (4) is provided with and described first buffer area (5), the first cavity (8) that described second buffer area (6) matches and the second cavity (9), described cylinder barrel end cap (4) is also provided with the hydraulic fluid port (10) be connected with described first cavity (8),
Buffering spill port (12) and oil inlet hole (11) is provided with in described second buffer area, described oil inlet hole (11) radially runs through described piston rod (1), described buffering spill port (12) is axially set and be connected with described oil inlet hole (11) from described piston rod (1) end face along described piston rod (1), is provided with one-way valve (13) in described buffering spill port (12);
Described first buffer area (5) diameter of piston rod is greater than described second buffer area (6) diameter of piston rod.
2. high-voltage oil cylinder according to claim 1, it is characterized in that, described second buffer area (6) is provided with many and is distributed in the compensating groove on described piston rod (1) surface vertically or along the circumferentially uniform throttling groove of described piston rod (1), described compensating groove or throttling groove are along deepening gradually to described cylinder barrel end cap (4) direction.
3. high-voltage oil cylinder according to claim 1, is characterized in that, described second Buffer Design is cylndrical surface.
4. high-voltage oil cylinder according to claim 1, is characterized in that, many described grooves (7) are parallel to each other and spacing is equal.
5. high-voltage oil cylinder according to claim 1, is characterized in that, described hydraulic fluid port (10) is connected with described first cavity (8).
6. high-voltage oil cylinder according to claim 1, is characterized in that, described second buffer area (6) and described second cavity (9) fit system are Spielpassung.
7. high-voltage oil cylinder according to claim 1, it is characterized in that, the spring device for screwing up (133) that described one-way valve (13) comprises steel ball (131), the holddown spring (132) be connected with described steel ball (131) and is connected with described holddown spring (132).
8. an excavator, is characterized in that, described excavator is provided with the high-voltage oil cylinder described in any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210211969.4A CN102705294B (en) | 2012-06-26 | 2012-06-26 | A kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210211969.4A CN102705294B (en) | 2012-06-26 | 2012-06-26 | A kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705294A CN102705294A (en) | 2012-10-03 |
| CN102705294B true CN102705294B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210211969.4A Expired - Fee Related CN102705294B (en) | 2012-06-26 | 2012-06-26 | A kind of high-voltage oil cylinder and comprise the excavator of this oil cylinder |
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| Country | Link |
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| CN (1) | CN102705294B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179366B (en) * | 2015-10-09 | 2017-03-01 | 济南大学 | A kind of flexibility vortex power-assisted, automatic slag removal and no accumulative pressure hydraulic cylinder |
| CN108799227B (en) * | 2018-06-23 | 2020-12-11 | 江苏创良智能数控科技有限公司 | Oil cylinder buffer valve and speed reduction oil cylinder for numerical control machine tool |
| CN109578369A (en) * | 2018-12-04 | 2019-04-05 | 长安大学 | A kind of buffer unit of flexible boom cylinder |
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
| CN116181875A (en) * | 2023-03-10 | 2023-05-30 | 烟台南工大环球智能装备有限公司 | Indexing speed reducing mechanism of hydraulic turntable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3441005A1 (en) * | 1983-11-16 | 1985-05-30 | Wabco Westinghouse Gmbh, Wien | Pneumatic working cylinder with pneumatic end-position damping |
| CN201730894U (en) * | 2010-08-06 | 2011-02-02 | 安徽合力股份有限公司 | Pneumatic and hydraulic cylinder with oil delivering and air storage functions |
| CN102155457A (en) * | 2010-07-23 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic oil cylinder, hydraulic buffering system, excavator and concrete pump truck |
| CN202215533U (en) * | 2011-08-12 | 2012-05-09 | 三一重机有限公司 | Novel bidirectional buffering structure of high pressure oil cylinder |
| CN202220773U (en) * | 2011-09-05 | 2012-05-16 | 扬州扬宝机械有限公司 | Hydraulic pressure buffer cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201293007Y (en) * | 2008-11-17 | 2009-08-19 | 郑州宇通重工有限公司 | Amortization structure suitable for hydraulic cylinder tail end |
-
2012
- 2012-06-26 CN CN201210211969.4A patent/CN102705294B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3441005A1 (en) * | 1983-11-16 | 1985-05-30 | Wabco Westinghouse Gmbh, Wien | Pneumatic working cylinder with pneumatic end-position damping |
| CN102155457A (en) * | 2010-07-23 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic oil cylinder, hydraulic buffering system, excavator and concrete pump truck |
| CN201730894U (en) * | 2010-08-06 | 2011-02-02 | 安徽合力股份有限公司 | Pneumatic and hydraulic cylinder with oil delivering and air storage functions |
| CN202215533U (en) * | 2011-08-12 | 2012-05-09 | 三一重机有限公司 | Novel bidirectional buffering structure of high pressure oil cylinder |
| CN202220773U (en) * | 2011-09-05 | 2012-05-16 | 扬州扬宝机械有限公司 | Hydraulic pressure buffer cylinder |
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| Publication number | Publication date |
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| CN102705294A (en) | 2012-10-03 |
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