CN103671347A - Hydraulic oil cylinder - Google Patents
Hydraulic oil cylinder Download PDFInfo
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- CN103671347A CN103671347A CN201310683422.9A CN201310683422A CN103671347A CN 103671347 A CN103671347 A CN 103671347A CN 201310683422 A CN201310683422 A CN 201310683422A CN 103671347 A CN103671347 A CN 103671347A
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- cylinder barrel
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- hydraulic jack
- piston
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Abstract
The invention provides a hydraulic oil cylinder. The hydraulic oil cylinder comprises a first-level cylinder barrel, a second-level cylinder barrel, a piston and a piston rod, wherein the second-level cylinder barrel is arranged inside the first-level cylinder barrel, the inner wall of the open end of the first-level cylinder barrel is in sealing fit with the outer wall of the second-level cylinder barrel, the piston is fixedly connected with one end of the piston rod and is in sealing fit with the inner wall of the second-level cylinder barrel, and the piston rod is in sealing fit with the inner wall of the open end of the second-level cylinder barrel. Due to the fact that a two-level oil cylinder structure which is only provided with the first-level cylinder barrel and the second-level cylinder barrel is adopted, compared with the prior art, the hydraulic oil cylinder has the advantages that a level of cylinder barrel is omitted, the structure is simpler, the number of oil leakage points can be reduced, and the hydraulic oil cylinder is higher in sealing performance and reliability and can be manufactured, installed, adjusted and maintained more conveniently.
Description
Technical field
The present invention relates to mechanical structure technology, relate in particular to a kind of hydraulic jack.
Background technique
Large-scale mine Tipper Lifting hydraulic jack, in when unloading, hydraulic jack rises container, when material dump clean after, by container Hui Ping to normal position.The reliability and safety of hydraulic jack is directly connected to the working performance of quarry tipper and the productivity in mine.
Fig. 1 is the structural representation of existing hydraulic jack; As shown in Figure 1, existing large-scale mine dumping car is generally three grades of cylinder structures, comprise one-level cylinder barrel 1, be arranged in one-level cylinder barrel 1 can be moving secondary cylinder barrel 2 and be arranged on and in 3, the three grades of cylinder barrels 3 of movably three grades of cylinder barrels in secondary cylinder barrel 2, be provided with piston 4, piston rod 5 and buffering valve rod 6.The lower end endoporus of one-level cylinder barrel 1, secondary cylinder barrel 2 and three grades of cylinder barrels 3 is respectively equipped with corresponding first piston ring 11, the second piston ring 21 and the 3rd piston ring 31, on each piston ring, be respectively equipped with groove, Sealing and dust ring etc. are housed in groove, upper ear seat 7 is connected with container, lower seat ear 8 is connected with vehicle frame elevating ram bearing, at present seat ear 8 is motionless in lifting, and seat of honour ear 7 stretches out together with cylinder barrel.Between cylinder barrels at different levels and corresponding piston ring, all adopt welding manner to connect, piston rod 5 adopts segmentation processing welded structure again, when container falls after rise, can only play buffer function by buffering valve rod.
Because existing hydraulic jack is three grades of oil cylinder modes, oil cylinder progression is more, and load link and component are corresponding more, and therefore, this hydraulic jack sealing and reliability are poor, and maintenance load is large and working life is lower.In addition, due between cylinder barrels at different levels and corresponding piston ring, adopt welding manner to connect, after welding, the form and position tolerance such as cylinder barrel cylindricity is difficult for guaranteeing, easily causes fluid to reveal; Because piston rod 5 is welded structure, welded joint easily lost efficacy, easily there is residual stress in weld seam and near zone thereof, welding heat stress and thermal fatigue problem, if welded structure self exists in the situation of defect, when lifting is learnt in test, cylinder barrels at different levels are in its interior oil hydraulic coupling existence sudden change of the moment of just having stretched out, the phenomenon that container likely can occur to shake up and down when this pressure jump value is very large, the fluid of piston rod 5 inside also exists pressure jump and sudden change value also very large, and visible cylinder barrel and piston rod 5 are stressed when lifting is very harsh.And welded joint easily lost efficacy, easily there is residual stress in weld seam and near zone thereof, and welding heat stress and thermal fatigue problem, under above-mentioned harsh stress condition, may cause the parts such as piston rod to occur phenomenon of rupture.
In addition; when falling after rise, lifting hydraulic jack can only play buffer function by buffering valve rod; and this buffering works while just falling after rise for one-level cylinder barrel 1; secondary cylinder barrel 2 and three grades of cylinder barrels 3 do not have buffer protection while falling after rise; the impact that is fallen after rise velocity shock and cylinder barrel own wt just can produce and clash into a lower ear 8; make a lower ear 8 easily impaired, working life is lower.
Summary of the invention
The invention provides a kind of hydraulic jack, for solving sealing and the poor technological deficiency of reliability of prior art hydraulic jack.
A kind of hydraulic jack provided by the invention, comprises one-level cylinder barrel, secondary cylinder barrel, piston and piston rod; Described secondary cylinder barrel is arranged in described one-level cylinder barrel, and the opening end inwall of described one-level cylinder barrel and the outer wall of described secondary cylinder barrel are sealed and matched;
Described piston is fixedly connected with described piston rod one end, and described piston coordinates with the inner wall sealing of described secondary cylinder barrel, and described piston rod coordinates with the opening end inner wall sealing of described secondary cylinder barrel.
Hydraulic jack as above, preferably, this hydraulic jack also comprises upper ear seat and lower ear base;
Described upper ear seat is connected with described one-level cylinder barrel, and described lower ear base is connected with the outer end of piston rod.
Hydraulic jack as above, preferably, described one-level cylinder barrel is the cylindrical structure with cylindrical cavity, described lower ear base fixed cover is located at one end of described one-level cylinder barrel, forms the closed end of one-level cylinder barrel.
Hydraulic jack as above, preferably, offers a plurality of annular grooves on the other end inwall of described one-level cylinder barrel, is provided with for sealing Sealing and the dust ring of described one-level cylinder barrel and secondary cylinder barrel in described a plurality of annular grooves.
Hydraulic jack as above, preferably, described secondary cylinder barrel is the cylindrical structure with cylindrical cavity, on one end inwall of described secondary cylinder barrel, offers a plurality of annular grooves, is provided with for sealing Sealing and the dust ring of described secondary cylinder barrel and piston rod in described a plurality of annular grooves.
Hydraulic jack as above, preferably, described piston rod comprises piston assembly department and hollow circuit cylinder portion;
On described piston assembly department, have for the mounting hole of described piston is installed; Described piston assembly department and hollow circuit cylinder portion one shape.
Hydraulic jack as above, preferably, the part that described lower ear base is connected with piston rod is provided with ladder assembly department, and the first end difference of described ladder assembly department is fixedly connected with the hollow circuit cylinder portion of described piston rod;
On the second end difference of described ladder assembly department, be arranged with cushion, described cushion is arranged between described secondary cylinder barrel and described lower ear base, for cushioning the impact of described secondary cylinder barrel to described lower ear base.
Hydraulic cylinder as above, preferably, described cushion is nylon pad.
Hydraulic jack provided by the invention, owing to being only provided with the two-stage cylinder structure of one-level cylinder barrel and secondary cylinder barrel, compared with prior art, reduce one-level cylinder barrel, structure is simpler, simultaneously can reduce fluid leak point, thus the sealing of this hydraulic jack and reliability higher, and manufacture, install, debug and keep in repair more convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing hydraulic jack;
The structural representation of the hydraulic jack that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the one-level cylinder barrel that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the piston rod that Fig. 4 provides for the embodiment of the present invention;
The plan view of the cushion that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the left view of cushion shown in Fig. 5.
Reference character:
1-one-level cylinder barrel; 2-secondary cylinder barrel; 4-piston;
5-piston rod; 6-cushions valve rod; 7-upper ear seat;
8-lower ear base; 9-cushion; 10-annular groove;
51-piston assembly department; 52-hollow circuit cylinder portion.
Embodiment
The structural representation of the hydraulic jack that Fig. 2 provides for the embodiment of the present invention; As shown in Figure 2, the hydraulic jack that the present embodiment provides, can be used as the act hydraulic pressure oil-lifting jar that the medium-and-large-sized quarry tipper of open coal mine is used, and comprises one-level cylinder barrel 1, secondary cylinder barrel 2, piston 4 and piston rod 5; Secondary cylinder barrel 2 is arranged in one-level cylinder barrel 1, and the opening end inwall of one-level cylinder barrel 1 and the outer wall of secondary cylinder barrel 2 are sealed and matched; During concrete fit system has a lot, such as making can also to keep sealing by relative sliding between one-level cylinder barrel 1 and secondary cylinder barrel 2 by the modes such as seal ring being set by one- level cylinder barrel 1 and 2 sealings of secondary cylinder barrel, avoid leakage of oil or enter dust.
Piston 4 is fixedly connected with piston rod 5 one end, piston 4 coordinates with the inner wall sealing of secondary cylinder barrel 2, can seal by Sealing, piston rod 5 coordinates with the opening end inner wall sealing of secondary cylinder barrel 2, can seal by Sealing, assurance piston 4 and piston rod 5 can, in the interior slip of secondary cylinder barrel 2, be avoided leakage of oil or enter dust.
In the present embodiment, the length of one-level cylinder barrel 1 and secondary cylinder barrel 2, can determine according to real work stroke, as be applied on large-scale mine dumping car, for, what the length of one-level cylinder barrel 1 and secondary cylinder barrel 2 can be arranged is longer, to meet the lifting demand of container.
The hydraulic jack that the present embodiment provides, owing to being only provided with the two-stage cylinder structure of one-level cylinder barrel and secondary cylinder barrel, compared with prior art, reduce one-level cylinder barrel, structure is simpler, simultaneously can reduce fluid leak point, thus this hydraulic jack sealing and reliability higher, and manufacture, install, debug and keep in repair more convenient.
The structural representation of the one-level cylinder barrel that Fig. 3 provides for the embodiment of the present invention; As shown in Figure 3, further, on the basis of above-described embodiment technological scheme, this hydraulic jack also comprises upper ear seat 7 and lower ear base 8; Upper ear seat 7 is connected with one-level cylinder barrel 1, and lower ear base 8 is connected with the outer end of piston rod 5.Particularly, one-level cylinder barrel 1 is for having the cylindrical structure of cylindrical cavity, and lower ear base 8 fixed covers are located at one end of one-level cylinder barrel 1, form the closed end of one-level cylinder barrel 1.On the other end inwall of one-level cylinder barrel 1, offer a plurality of annular grooves 10, in a plurality of annular grooves 10, be provided with for sealing Sealing and the dust ring of one-level cylinder barrel 1 and secondary cylinder barrel 2, a plurality of annular grooves can directly process by machining mode on the inwall of one-level cylinder barrel 1.
The hydraulic jack that the present embodiment provides, one-level cylinder barrel 1 and secondary cylinder barrel 2 inwalls all offer a plurality of annular grooves, compared with prior art, one-level cylinder barrel 1 and secondary cylinder barrel 2, for integral body processes, need not re-use welded structure, and annular groove can be processed by machining mode and above-mentioned cylinder barrel one, therefore, the form and position tolerance of one-level cylinder barrel 1 and secondary cylinder barrel 2 (as cylindricity etc.) be easily guaranteed, thereby reduce the possibility that fluid is revealed, improved sealing.
The structural representation of the piston rod that Fig. 4 provides for the embodiment of the present invention; As shown in Figure 4, on the basis of technique scheme, further, piston rod 5 comprises piston assembly department 51 and hollow circuit cylinder portion 52; On piston assembly department 51, have for the mounting hole of piston is installed; Piston assembly department 51 and hollow circuit cylinder portion 52 one shape.
Because the piston assembly department 51 of piston rod 5 is integrated and shapes with hollow circuit cylinder portion 52, the defect that can avoid available technology adopting segmentation welding to bring, improve Anti-pull-press, the anti-shear performance of piston rod 5, reduce to greatest extent the possibility that hydraulic jack phenomenon of rupture occurs, improve Security.
The plan view of the cushion that Fig. 5 provides for the embodiment of the present invention; Fig. 6 is the left view of cushion shown in Fig. 5.With reference to figure 1,5 and 6, the part that lower ear base 8 is connected with piston rod 5 is provided with ladder assembly department simultaneously, and the first end difference of ladder assembly department is fixedly connected with the hollow circuit cylinder portion of piston rod 5; On the second end difference of ladder assembly department, be arranged with cushion 9, cushion 9 is arranged between secondary cylinder barrel 2 and lower ear base 8, for cushioning the impact of 2 pairs of lower ear bases 8 of secondary cylinder barrel.Particularly, cushion 9 can be nylon pad, can be also other elastic washers such as rubber pad.
In real work, when one-level cylinder barrel 1 falls after rise, can play buffer function (shown in Fig. 1) by buffering valve rod 6, when secondary cylinder barrel 2 declines, the end of secondary cylinder barrel 2 is dropped on this cushion 9, directly do not contact with a lower ear 8, cushion 9 can reduce 2 pairs of lower ears 8 of secondary cylinder barrel to be impacted, the working life that can improve hydraulic jack.One-level cylinder barrel 1 relies on buffering valve rod to play buffer function while falling after rise, secondary cylinder barrel 2 relies on cushion 9 to play buffer function, thereby plays dual fail-safe effect.
Finally it should be noted that: each embodiment, only in order to technological scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technological scheme that still can record aforementioned each embodiment is modified, or some or all of technical characteristics is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technological scheme.
Claims (8)
1. a hydraulic jack, is characterized in that, comprises one-level cylinder barrel, secondary cylinder barrel, piston and piston rod; Described secondary cylinder barrel is arranged in described one-level cylinder barrel, and the opening end inwall of described one-level cylinder barrel and the outer wall of described secondary cylinder barrel are sealed and matched;
Described piston is fixedly connected with described piston rod one end, and described piston coordinates with the inner wall sealing of described secondary cylinder barrel, and described piston rod coordinates with the opening end inner wall sealing of described secondary cylinder barrel.
2. hydraulic jack according to claim 1, is characterized in that, this hydraulic jack also comprises upper ear seat and lower ear base;
Described upper ear seat is connected with described one-level cylinder barrel, and described lower ear base is connected with the outer end of piston rod.
3. hydraulic jack according to claim 2, is characterized in that, described one-level cylinder barrel is the cylindrical structure with cylindrical cavity, and described lower ear base fixed cover is located at one end of described one-level cylinder barrel, forms the closed end of one-level cylinder barrel.
4. hydraulic jack according to claim 3, is characterized in that, on the other end inwall of described one-level cylinder barrel, offers a plurality of annular grooves, is provided with for sealing Sealing and the dust ring of described one-level cylinder barrel and secondary cylinder barrel in described a plurality of annular grooves.
5. according to the arbitrary described hydraulic jack of claim 1-4, it is characterized in that, described secondary cylinder barrel is the cylindrical structure with cylindrical cavity, on one end inwall of described secondary cylinder barrel, offer a plurality of annular grooves, in described a plurality of annular grooves, be provided with for sealing Sealing and the dust ring of described secondary cylinder barrel and piston rod.
6. according to the arbitrary described hydraulic jack of claim 1-4, it is characterized in that, described piston rod comprises piston assembly department and hollow circuit cylinder portion;
On described piston assembly department, have for the mounting hole of described piston is installed; Described piston assembly department and hollow circuit cylinder portion one shape.
7. hydraulic jack according to claim 6, is characterized in that, the part that described lower ear base is connected with piston rod is provided with ladder assembly department, and the first end difference of described ladder assembly department is fixedly connected with the hollow circuit cylinder portion of described piston rod;
On the second end difference of described ladder assembly department, be arranged with cushion, described cushion is arranged between described secondary cylinder barrel and described lower ear base, for cushioning the impact of described secondary cylinder barrel to described lower ear base.
8. hydraulic cylinder according to claim 7, is characterized in that, described cushion is nylon pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310683422.9A CN103671347A (en) | 2013-12-12 | 2013-12-12 | Hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310683422.9A CN103671347A (en) | 2013-12-12 | 2013-12-12 | Hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103671347A true CN103671347A (en) | 2014-03-26 |
Family
ID=50309864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310683422.9A Pending CN103671347A (en) | 2013-12-12 | 2013-12-12 | Hydraulic oil cylinder |
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| Country | Link |
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| CN (1) | CN103671347A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298982A (en) * | 2015-11-03 | 2016-02-03 | 内蒙古北方重工业集团有限公司 | Double-acting multi-stage telescopic oil cylinder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000542A1 (en) * | 1981-07-30 | 1983-02-17 | Field, Jesse, L., Jr. | Fluid flow control system for an extensible jack |
| KR20090009617A (en) * | 2007-07-20 | 2009-01-23 | 정성윤 | Multi stage cylinder |
| CN201588837U (en) * | 2010-01-29 | 2010-09-22 | 白炳生 | Two-stage sleeve oil cylinder with oil intake on center of top cylinder |
| CN202348826U (en) * | 2011-12-19 | 2012-07-25 | 湘电重型装备股份有限公司 | Three-stage hydraulic lifting oil cylinder for large-scale mining dump truck |
| CN202391857U (en) * | 2011-11-10 | 2012-08-22 | 常州市腾田液压机械有限公司 | Two-stage cylinder-positioned speed-adjustable oil cylinder |
| CN102767548A (en) * | 2012-07-26 | 2012-11-07 | 三一矿机有限公司 | Multi-stage hydraulic cylinder and mining self-dumping truck |
| CN203604331U (en) * | 2013-12-12 | 2014-05-21 | 北京二七轨道交通装备有限责任公司 | Hydraulic oil cylinder |
-
2013
- 2013-12-12 CN CN201310683422.9A patent/CN103671347A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000542A1 (en) * | 1981-07-30 | 1983-02-17 | Field, Jesse, L., Jr. | Fluid flow control system for an extensible jack |
| KR20090009617A (en) * | 2007-07-20 | 2009-01-23 | 정성윤 | Multi stage cylinder |
| CN201588837U (en) * | 2010-01-29 | 2010-09-22 | 白炳生 | Two-stage sleeve oil cylinder with oil intake on center of top cylinder |
| CN202391857U (en) * | 2011-11-10 | 2012-08-22 | 常州市腾田液压机械有限公司 | Two-stage cylinder-positioned speed-adjustable oil cylinder |
| CN202348826U (en) * | 2011-12-19 | 2012-07-25 | 湘电重型装备股份有限公司 | Three-stage hydraulic lifting oil cylinder for large-scale mining dump truck |
| CN102767548A (en) * | 2012-07-26 | 2012-11-07 | 三一矿机有限公司 | Multi-stage hydraulic cylinder and mining self-dumping truck |
| CN203604331U (en) * | 2013-12-12 | 2014-05-21 | 北京二七轨道交通装备有限责任公司 | Hydraulic oil cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298982A (en) * | 2015-11-03 | 2016-02-03 | 内蒙古北方重工业集团有限公司 | Double-acting multi-stage telescopic oil cylinder |
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Application publication date: 20140326 |
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