CN104514767A - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN104514767A CN104514767A CN201410782256.2A CN201410782256A CN104514767A CN 104514767 A CN104514767 A CN 104514767A CN 201410782256 A CN201410782256 A CN 201410782256A CN 104514767 A CN104514767 A CN 104514767A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- cylinder barrel
- oil hydraulic
- barrel
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
Abstract
The invention discloses a hydraulic cylinder, including a cylinder barrel (1), wherein one end of the cylinder barrel (1) is connected with a cylinder bottom (2) while the other end forms a cylinder rod extending end, a first sealing member (5) is arranged on the inner peripheral surface of the cylinder rod extending end, the cylinder barrel (1) and the cylinder bottom (2) are fixed with each other by a positioning member positioned in the cylinder barrel (1) and simultaneously stopping the cylinder barrel (1) and the cylinder bottom (2). The hydraulic cylinder can simultaneously meet the requirements on strength, assembly and dimensional limit.
Description
Technical field
The present invention relates to hydraulic element field, particularly, relate to a kind of oil hydraulic cylinder.
Background technique
All can there is many requirements in oil hydraulic cylinder in its assembling, size and intensity.For multistage hydraulic cylinder, current multistage hydraulic cylinder design is because of boundary dimension restriction, cylinder diameter differs less with secondary bar footpath, Fig. 1 shows a kind of multistage hydraulic cylinder of the prior art, its cylinder bottom 2 adopts welding type to be connected with cylinder barrel 1, sealed by the guide sleeve 3 being provided with Sealing between the cylinder bar external part of its secondary cylinder bar 4 and cylinder barrel 1, the existence of guide sleeve 3 makes the wall thickness of the cylinder bar external part of cylinder barrel 1 very thin, which decreases the intensity of oil hydraulic cylinder.
Fig. 2 shows another kind of multistage hydraulic cylinder of the prior art, its cylinder bottom 2 and cylinder barrel 1 also adopt welding type to be connected, between its secondary cylinder bar 4 and the cylinder bar external part of cylinder barrel 1, the same guide sleeve 3 by being provided with Sealing seals, in order to ensure the intensity of oil hydraulic cylinder, the external diameter of the end supplying cylinder bar to stretch out of cylinder barrel 1 increases, thus cannot meet the boundary dimension restriction of multistage hydraulic cylinder.
The inner peripheral surface of the cylinder bar external part of the cylinder barrel 1 in another multistage hydraulic cylinder of the prior art in Fig. 3 is provided with Sealing, so do not need to seal secondary cylinder bar 4 by the guide sleeve 3 in Fig. 1 and Fig. 2, so the size of the cylinder bar external part of cylinder barrel 1 can meet size restriction requirements, but in this case, owing to being subject to the constraint of the size of cylinder barrel 1 own, (namely the internal diameter of the cylinder bar external part of cylinder barrel 1 is relatively little, be less than the internal diameter of one end be connected with cylinder bottom 2 of cylinder barrel 1), secondary cylinder bar 4 does not carry out dismounting (insert or extract) by the cylinder bar external part of cylinder barrel 1 usually, so at this moment cylinder bottom 2 is undertaken being connected to make secondary cylinder bar 4 can realize dismounting (insert or extract) by one end be connected with cylinder bottom 2 of cylinder barrel 1 by this removably mode of flange arrangement with cylinder barrel 1, flange arrangement makes the oversize of one end be connected with cylinder bottom 2 of cylinder barrel 1, the boundary dimension restriction of multistage hydraulic cylinder can not be met.
Given this, be necessary to provide a kind of novel oil hydraulic cylinder, to meet the requirement of the requirement of strength of oil hydraulic cylinder, matching requirements and boundary dimension restriction simultaneously.
Summary of the invention
The object of this invention is to provide a kind of oil hydraulic cylinder, this oil hydraulic cylinder can meet the requirement of the requirement of strength of oil hydraulic cylinder, matching requirements and boundary dimension restriction simultaneously.
To achieve these goals, the invention provides a kind of oil hydraulic cylinder, this oil hydraulic cylinder comprises cylinder barrel, this cylinder barrel one end is connected with cylinder bottom, the other end is formed as cylinder bar external part, wherein, the inner peripheral surface of described cylinder bar external part is provided with the first Sealing, described cylinder barrel and cylinder bottom by be positioned at described cylinder barrel and simultaneously cylinder barrel and cylinder bottom described in backstop locating piece and be fixed to one another.
Preferably, described locating piece is back-up ring, and described back-up ring is arranged in the periphery annular groove of described cylinder bottom and the inner circumferential annular groove of described cylinder barrel.
Preferably, the surface of contact of described cylinder barrel and cylinder bottom is formed with radial groove respect to one another respectively, the respective radial groove of described cylinder barrel and cylinder bottom forms radial hole jointly, is provided with the fastening piece preventing described cylinder barrel and cylinder bottom from relatively rotating with respect to each other in described radial hole.
Preferably, described radial groove is cross section is semicircular thread groove, and described fastening piece is threaded fastener.
Preferably, described cylinder bottom is formed with axial bore, described axial bore is communicated with the bottom of the periphery annular groove of described cylinder bottom, be provided with secure component in described axial bore, described secure component contacts with the inner peripheral surface of described back-up ring described back-up ring is fastened in the periphery annular groove of described cylinder bottom and the inner circumferential annular groove of described cylinder barrel.
Preferably, described cylinder barrel is formed with at least two passages of the bottom of outside and the described periphery annular groove being communicated with described cylinder barrel, enters completely in the periphery annular groove of cylinder bottom by the pressing member at least two passages described in stretching into respectively described back-up ring can be pressed into.
Preferably, described at least two passages are two, and described two passages bearing of trend is separately in the same of described cylinder barrel diametrically.
Preferably, described oil hydraulic cylinder is multistage hydraulic cylinder, and described first Sealing is posted by the final stage cylinder bar in described cylinder bar.
Preferably, the outer circumferential face of described final stage cylinder bar is provided with first ring connected in star, is provided with the second Sealing of the internal face being posted by described cylinder barrel in described first ring connected in star.
Preferably, the inner peripheral surface of described final stage cylinder bar is provided with the second annular groove, Sealing shield ring is provided with in described second annular groove, the periphery of described final stage cylinder bar is formed with the step corresponding with described Sealing shield ring, when putting in place to make described final stage cylinder bar retract, described step and the mutual backstop of described Sealing shield ring.
Pass through technique scheme, inner peripheral surface due to the cylinder bar external part in oil hydraulic cylinder provided by the invention is provided with the first Sealing, so no longer need the guide sleeve sealing cylinder bar external part by being provided with Sealing, save guide sleeve structure and can ensure that the wall thickness of cylinder bar external part had not only met requirement of strength but also met the requirement (needs do not increase cylinder bar external part external diameter) of boundary dimension restriction, in addition, described cylinder barrel and cylinder bottom by be positioned at described cylinder barrel and simultaneously cylinder barrel and cylinder bottom described in backstop locating piece and be fixed to one another, because this locating piece is positioned at described cylinder barrel, so ensure that this locating piece can not affect the boundary dimension of one end be connected with cylinder bottom of cylinder barrel, thus the requirement that the boundary dimension that can meet one end be connected with cylinder bottom of cylinder barrel limits, and the connection of cylinder barrel and cylinder bottom can be ensured by dismounting locating piece or be separated, thus ensure that matching requirements---namely now cylinder bar can realize dismounting (insert or extract) from one end be connected with cylinder bottom 2 of cylinder barrel 1, can sum up from above analysis, oil hydraulic cylinder provided by the invention can meet the requirement of strength of oil hydraulic cylinder simultaneously, the requirement of matching requirements and boundary dimension restriction.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of multistage hydraulic cylinder of the prior art.
Fig. 2 is the structural representation of another kind of multistage hydraulic cylinder of the prior art.
Fig. 3 is the structural representation of another multistage hydraulic cylinder of the prior art.
Fig. 4 is the structural representation of oil hydraulic cylinder according to the embodiment of the present invention.
Fig. 5 is the sectional drawing along the A-A line cutting in Fig. 4.
Fig. 6 is the enlarged view in the B region in Fig. 4.
Description of reference numerals
1 cylinder barrel 2 cylinder bottom
3 guide sleeve 4 secondary cylinder bars
5 first Sealing 6 back-up rings
7 fastening piece 8 secure components
9 path 10 second Sealings
11 Sealing shield ring 12 steps
13 first-stage cylinder bars
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
See Fig. 4, the invention provides a kind of oil hydraulic cylinder, this oil hydraulic cylinder comprises cylinder barrel 1, this cylinder barrel 1 one end is connected with cylinder bottom 2, the other end is formed as cylinder bar external part, wherein, the inner peripheral surface of cylinder bar external part is provided with the first Sealing 5 (such as rubber seal etc., usually to seal cylinder bar external part on the outer circumferential face abutting in cylinder bar), cylinder barrel 1 and cylinder bottom 2 by be positioned at cylinder barrel 1 and simultaneously backstop cylinder barrel 1 and cylinder bottom 2 locating piece and be fixed to one another.
As mentioned above, inner peripheral surface due to the cylinder bar external part of the cylinder barrel 1 in oil hydraulic cylinder provided by the invention is provided with the first Sealing 5, so no longer need to seal cylinder bar external part by the guide sleeve 3 being provided with Sealing of the prior art, save guide sleeve 3 structure and can ensure that the wall thickness of cylinder bar external part had not only met requirement of strength but also met the requirement (needs do not increase cylinder bar external part external diameter) of boundary dimension restriction, in addition, cylinder barrel 1 and cylinder bottom 2 are by being positioned at cylinder barrel 1 and stopping the locating piece of cylinder barrel 1 and cylinder bottom 2 and be fixed to one another simultaneously, because this locating piece is positioned at cylinder barrel 1, so ensure that this locating piece can not affect the boundary dimension of one end be connected with cylinder bottom of cylinder barrel 1, thus the requirement that the boundary dimension that can meet one end be connected with cylinder bottom 2 of cylinder barrel 1 limits, and the connection of cylinder barrel 1 and cylinder bottom 2 can be ensured by dismounting locating piece or be separated, thus ensure that matching requirements---namely now cylinder bar can realize dismounting (insert or extract) from one end be connected with cylinder bottom 2 of cylinder barrel 1, can sum up from above analysis, oil hydraulic cylinder provided by the invention can meet the requirement of strength of oil hydraulic cylinder simultaneously, the requirement of matching requirements and boundary dimension restriction.
The concrete form of above locating piece is also not particularly limited, such as, can be locating stud or threaded fastener, as long as can be arranged in cylinder barrel 1 and backstop cylinder barrel 1 and cylinder bottom 2 and make cylinder barrel 1 and cylinder bottom 2 be fixed to one another simultaneously.More clearly find out from Fig. 5 or Fig. 6, in a preferred embodiment of the invention, locating piece can for the back-up ring 6 (can be such as Steel Cable Baffle Ring) in the inner circumferential annular groove of the periphery annular groove and cylinder barrel 1 that are arranged on cylinder bottom 2, this mode that cylinder barrel 1 and cylinder bottom 2 are fixed to one another by back-up ring 6 not easily twists, and regulates and dismantles also more for convenience.
In addition, the surface of contact of cylinder barrel 1 and cylinder bottom 2 can be formed with radial groove respect to one another respectively, the respective radial groove of cylinder barrel 1 and cylinder bottom 2 forms radial hole jointly, is provided with the fastening piece 7 preventing cylinder barrel 1 and cylinder bottom 2 from relatively rotating with respect to each other in radial hole.Particularly, radial groove can be semicircular thread groove for cross section, thus the respective radial groove of cylinder barrel 1 and cylinder bottom 2 can coordinate formation tapped hole jointly, and fastening piece 7 can be threaded fastener.
In addition, cylinder bottom 2 can be formed with axial bore, axial bore is communicated with the bottom of the periphery annular groove of cylinder bottom 2, is provided with secure component 8 in axial bore, and secure component 8 contacts with the inner peripheral surface of back-up ring 6 back-up ring 6 is fastened in the periphery annular groove of cylinder bottom 2 and the inner circumferential annular groove of cylinder barrel 1.
In addition, cylinder barrel 1 is formed with at least two passages 9 being communicated with the outside of cylinder barrel 1 and the bottom of periphery annular groove, being pressed into by back-up ring 6 in the periphery annular groove entering cylinder bottom 2 completely and thinking that cylinder barrel 1 provides necessary condition with being separated of cylinder bottom 2 by stretching into pressing member at least two passages 9 elongated elements such as () such as bar, rod, rods respectively.
Preferably, at least two passages 9 can be two, and the respective bearing of trend of two passages 9 can be in the same of cylinder barrel 1 diametrically, more conveniently like this use two pressing members to stretch in passage 9 respectively to press back-up ring 6.
Be understandable that, the kind of oil hydraulic cylinder provided by the invention is not particularly limited, and such as, this oil hydraulic cylinder can be multistage hydraulic cylinder, for the two-stage oil hydraulic cylinder in Fig. 4, the first Sealing 5 is posted by the final stage cylinder bar (being equivalent to the secondary cylinder bar 4 in Fig. 4) in cylinder bar.In addition, the outer circumferential face of final stage cylinder bar can also be provided with first ring connected in star, is provided with second Sealing 10 (such as rubber seal etc., but the present invention is not limited thereto) of the internal face being posted by cylinder barrel 1 in first ring connected in star.
In addition, the inner peripheral surface of final stage cylinder bar can be provided with the second annular groove, Sealing shield ring 11 is provided with in second annular groove, the periphery of secondary final stage cylinder bar (being equivalent to the first-stage cylinder bar 13 in Fig. 4) is formed with the step 12 corresponding with Sealing shield ring 11, when putting in place to make time final stage cylinder bar retraction, step 12 and Sealing shield ring 11 mutually backstop skid off from the left end of secondary cylinder bar 4 to prevent first-stage cylinder bar 13.
4 assembly processes describing oil hydraulic cylinder according to the embodiment of the present invention in detail with reference to the accompanying drawings below.
During installation, first first-stage cylinder bar 13 is loaded in secondary cylinder bar 4, again secondary cylinder bar 4 inserted from the left end of cylinder barrel 1 and be installed in cylinder barrel 1, then back-up ring 6 to be pressed in the periphery annular groove of cylinder bottom 2 and to load in cylinder barrel 1 with cylinder bottom 2, can expand when back-up ring 6 arrives the inner circumferential annular groove of cylinder barrel 1 and to be stuck in simultaneously in the periphery annular groove of cylinder bottom 2 and the inner circumferential annular groove of cylinder barrel 1 thus cylinder barrel 1 and cylinder bottom 2 are axially fixed each other, at this moment can install secure component 8 in the axial bore of cylinder bottom 2 is fastened in the periphery annular groove of cylinder bottom 2 and the inner circumferential annular groove of cylinder barrel 1 to make back-up ring 6, can jointly form mounting fastener 7 in radial hole at the respective radial groove of cylinder barrel 1 and cylinder bottom 2 thus cylinder barrel 1 and cylinder bottom 2 are radially fixed each other subsequently, so far, cylinder barrel 1 and cylinder bottom 2 are completely fixed each other, thus complete the installation of this oil hydraulic cylinder.
During dismounting, first fastening piece 7 and secure component 8 can be removed, then two pressing members elongated elements such as () such as bar, rod, rods are entered cylinder barrel 1 from the outside of cylinder barrel 1 along two passages 9 (two passages 9 up and down Fig. 4) inner and be pressed in the periphery annular groove of cylinder bottom 2 by back-up ring 6, finally further cylinder bottom 2 is extracted the dismounting that can realize this oil hydraulic cylinder from cylinder barrel 1.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. an oil hydraulic cylinder, this oil hydraulic cylinder comprises cylinder barrel (1), this cylinder barrel (1) one end is connected with cylinder bottom (2), the other end is formed as cylinder bar external part, it is characterized in that, the inner peripheral surface of described cylinder bar external part is provided with the first Sealing (5), described cylinder barrel (1) and cylinder bottom (2) by be positioned at described cylinder barrel (1) and simultaneously cylinder barrel (1) and cylinder bottom (2) described in backstop locating piece and be fixed to one another.
2. oil hydraulic cylinder according to claim 1, it is characterized in that, described locating piece is back-up ring (6), and described back-up ring (6) is arranged in the periphery annular groove of described cylinder bottom (2) and the inner circumferential annular groove of described cylinder barrel (1).
3. oil hydraulic cylinder according to claim 2, it is characterized in that, the surface of contact of described cylinder barrel (1) and cylinder bottom (2) is formed with radial groove respect to one another respectively, the respective radial groove of described cylinder barrel (1) and cylinder bottom (2) forms radial hole jointly, is provided with the fastening piece (7) preventing described cylinder barrel (1) and cylinder bottom (2) from relatively rotating with respect to each other in described radial hole.
4. oil hydraulic cylinder according to claim 2, is characterized in that, described radial groove is cross section is semicircular thread groove, and described fastening piece (7) is threaded fastener.
5. oil hydraulic cylinder as claimed in any of claims 2 to 4, it is characterized in that, (2) are formed with axial bore with described cylinder bottom, described axial bore is communicated with the bottom of the periphery annular groove of described cylinder bottom (2), be provided with secure component (8) in described axial bore, described secure component (8) contacts with the inner peripheral surface of described back-up ring (6) described back-up ring (6) is fastened in the periphery annular groove of described cylinder bottom (2) and the inner circumferential annular groove of described cylinder barrel (1).
6. oil hydraulic cylinder as claimed in any of claims 2 to 4, it is characterized in that, described cylinder barrel (1) is formed and is communicated with the outside of described cylinder barrel (1) and at least two passages (9) of bottom of described periphery annular groove, described back-up ring (6) can be pressed in the periphery annular groove entering cylinder bottom (2) completely by the pressing member at least two passages (9) described in stretching into respectively.
7. according to claim oil hydraulic cylinder according to claim 6, it is characterized in that, described at least two passages (9) are two, and the bearing of trend that described two passages (9) are respective is in the same of described cylinder barrel (1) diametrically.
8. oil hydraulic cylinder as claimed in any of claims 1 to 4, is characterized in that, described oil hydraulic cylinder is multistage hydraulic cylinder, and described first Sealing (5) is posted by the final stage cylinder bar in described cylinder bar.
9. oil hydraulic cylinder according to claim 8, it is characterized in that, the outer circumferential face of described final stage cylinder bar is provided with first ring connected in star, is provided with second Sealing (10) of the internal face being posted by described cylinder barrel (1) in described first ring connected in star.
10. oil hydraulic cylinder according to claim 8, it is characterized in that, the inner peripheral surface of described final stage cylinder bar is provided with the second annular groove, Sealing shield ring (11) is provided with in described second annular groove, the periphery of described final stage cylinder bar is formed with the step (12) corresponding with described Sealing shield ring (11), when putting in place to make described final stage cylinder bar retract, described step (12) and described Sealing shield ring (11) backstop mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782256.2A CN104514767B (en) | 2014-12-16 | 2014-12-16 | Hydro-cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782256.2A CN104514767B (en) | 2014-12-16 | 2014-12-16 | Hydro-cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104514767A true CN104514767A (en) | 2015-04-15 |
| CN104514767B CN104514767B (en) | 2016-06-01 |
Family
ID=52790517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410782256.2A Active CN104514767B (en) | 2014-12-16 | 2014-12-16 | Hydro-cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104514767B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324737A (en) * | 2020-10-20 | 2021-02-05 | 同济大学 | Adjusting device suitable for building differential settlement |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155456Y (en) * | 1992-12-09 | 1994-02-09 | 赵育武 | Gasoline tank separated hydraulic cylinder for agricultural machineries |
| CN2937587Y (en) * | 2006-07-28 | 2007-08-22 | 中煤张家口煤矿机械有限责任公司 | Single-acting expansion hydro-cylinder |
| CN201071855Y (en) * | 2007-06-20 | 2008-06-11 | 成都市新津光辉机械实业有限公司 | Multilevel sleeve type hydraulic oil cylinder |
| CN102032234A (en) * | 2011-01-06 | 2011-04-27 | 无锡新贝来液压有限公司 | Front cylinder with bottom connected through clip keys |
| CN201916274U (en) * | 2011-01-06 | 2011-08-03 | 无锡新贝来液压有限公司 | Pre-cylinder with cylinder bottom connected by clip keys |
| CN201925260U (en) * | 2011-01-18 | 2011-08-10 | 德州方向机厂有限责任公司 | Novel expandable sleeve oil cylinder |
| CN102410282A (en) * | 2011-09-21 | 2012-04-11 | 湖南特力液压有限公司 | Connecting structure of functional piece of driving cylinder |
| CN203362693U (en) * | 2013-06-09 | 2013-12-25 | 辽宁阿尔法液压有限公司 | Lifting cylinder guiding and limiting device installation positioning groove |
-
2014
- 2014-12-16 CN CN201410782256.2A patent/CN104514767B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155456Y (en) * | 1992-12-09 | 1994-02-09 | 赵育武 | Gasoline tank separated hydraulic cylinder for agricultural machineries |
| CN2937587Y (en) * | 2006-07-28 | 2007-08-22 | 中煤张家口煤矿机械有限责任公司 | Single-acting expansion hydro-cylinder |
| CN201071855Y (en) * | 2007-06-20 | 2008-06-11 | 成都市新津光辉机械实业有限公司 | Multilevel sleeve type hydraulic oil cylinder |
| CN102032234A (en) * | 2011-01-06 | 2011-04-27 | 无锡新贝来液压有限公司 | Front cylinder with bottom connected through clip keys |
| CN201916274U (en) * | 2011-01-06 | 2011-08-03 | 无锡新贝来液压有限公司 | Pre-cylinder with cylinder bottom connected by clip keys |
| CN201925260U (en) * | 2011-01-18 | 2011-08-10 | 德州方向机厂有限责任公司 | Novel expandable sleeve oil cylinder |
| CN102410282A (en) * | 2011-09-21 | 2012-04-11 | 湖南特力液压有限公司 | Connecting structure of functional piece of driving cylinder |
| CN203362693U (en) * | 2013-06-09 | 2013-12-25 | 辽宁阿尔法液压有限公司 | Lifting cylinder guiding and limiting device installation positioning groove |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324737A (en) * | 2020-10-20 | 2021-02-05 | 同济大学 | Adjusting device suitable for building differential settlement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104514767B (en) | 2016-06-01 |
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