CN102777443A - Hydraulic cylinder, hydraulic system and engineering machine - Google Patents
Hydraulic cylinder, hydraulic system and engineering machine Download PDFInfo
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- CN102777443A CN102777443A CN2012102908587A CN201210290858A CN102777443A CN 102777443 A CN102777443 A CN 102777443A CN 2012102908587 A CN2012102908587 A CN 2012102908587A CN 201210290858 A CN201210290858 A CN 201210290858A CN 102777443 A CN102777443 A CN 102777443A
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Abstract
The invention provides a hydraulic cylinder comprising a cylinder barrel, a cylinder bottom arranged at one end of the cylinder barrel, a guide sleeve arranged at the other end of the cylinder barrel, a piston arranged inside the cylinder barrel and a piston rod, wherein one end of the piston rod is connected with the piston, and the other end of the piston rod passes through the guide sleeve and extends to the exterior of the cylinder barrel; the inner cavity of the cylinder barrel is divided into a rod cavity and a rodless cavity by the piston; the cylinder barrel with the rod cavity is provided with a plurality of oil via holes and/or the cylinder barrel with the rodless cavity is provided with a plurality of oil through holes; the oil via holes and/or oil through holes are distributed along the axial direction of the cylinder barrel; and when the piston moves from the side at which the cylinder bottom is arranged to the side at which the guide sleeve is arranged, the oil through holes can be sequentially opened and/or the oil via holes can be sequentially shielded. The invention also provides a hydraulic system and an engineering machine. The hydraulic cylinder provided by the invention is simple in structure, convenient to process and also capable of buffering the rod cavity and the rodless cavity so that the service life of the hydraulic cylinder is effectively prolonged.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, relate to a kind of oil hydraulic cylinder, contain the hydraulic system and the engineering machinery of this oil hydraulic cylinder.
Background technique
At present, the method that is usually used in the terminal buffering of hydraulic cylinder travel has energy snubber method, off-load buffer method etc., and the energy snubber method adopts the slit buffering, and very high to the requirement on machining accuracy of oil hydraulic cylinder, buffer locations is also wanted heat treatment; The off-load buffer method when piston runs to the terminal, makes the hyperbaric chamber fluid of oil hydraulic cylinder flow back to fuel tank, and this method can only be eliminated the impact that pressure can cause, can not eliminate the impact that inertial force causes.
If during the terminal no damping device of hydraulic cylinder travel; Oil hydraulic cylinder is with hitting the cylinder phenomenon; Be between piston and the guide sleeve or the cylinder bottom of oil hydraulic cylinder mechanical impact to take place, there be very big influence in life-span of oil hydraulic cylinder, simultaneously; The metal granule that bump produces is stayed in the hydraulic system, and hydraulic oil and other element are all had very big influence.
A kind of buffer structure of rod chamber is provided in the correlation technique, and engage sleeves makes a plurality of holes cross the damping of oil adjusting buffering successively on the piston rod through being enclosed within, and realizes the rod chamber cushioning effect.This method has increased a piston rod engage sleeves and engage sleeves Returnning spring, makes the guide sleeve of oil hydraulic cylinder become complicated simultaneously, has increased the oil hydraulic cylinder cost, and only has been applicable to the buffering of rod chamber.
Summary of the invention
Technical problem to be solved by this invention is, a kind of oil hydraulic cylinder is provided, and is simple in structure, easy to process, can cushion rod chamber and rodless cavity simultaneously, improves cushioning effect, improves the working life of oil hydraulic cylinder.In addition, the present invention also provides a kind of hydraulic system.Moreover the present invention also provides a kind of engineering machinery.
In view of this; A kind of oil hydraulic cylinder provided by the invention; Comprise cylinder barrel, be arranged at said cylinder barrel one end cylinder bottom, be arranged at the said cylinder barrel the other end guide sleeve, be arranged at said cylinder barrel inner piston and piston rod; One end of said piston rod connects with said piston, and the other end of said piston rod passes said guide sleeve and extend to said cylinder barrel outside, and said piston is divided into rod chamber and rodless cavity with the inner chamber of said cylinder barrel; The cylinder barrel of forming said rod chamber is provided with a plurality of oil-through holes and/or forms on the cylinder barrel of said rodless cavity a plurality of oil throughs are set; A plurality of said oil-through holes and/or a plurality of said oil through be along the axial distribution of said cylinder barrel, and said piston can be opened a plurality of said oil throughs successively and/or cover a plurality of said oil-through holes successively during by the lateral movement at the said guide sleeve of a side direction at cylinder bottom place place.
In this technological scheme; Remove the essential cylinder barrel of oil hydraulic cylinder, be arranged at said cylinder barrel one end cylinder bottom, be arranged at the said cylinder barrel the other end guide sleeve, be arranged at said cylinder barrel inner piston and piston rod; Do not increase any component; Simple in structure, practical, can not make oil hydraulic cylinder become complicated, can not increase the cost of oil hydraulic cylinder.Than on piston rod, processing oil drainage hole; Scheme provided by the invention is processed oil-through hole and/or oil through on cylinder barrel, difficulty of processing is low, processes and make convenient; Realized the buffer function of oil hydraulic cylinder cylinder barrel; Through progressively eliminating caused impact of said piston inertia power and the caused impact of pressure, effectively avoided oil hydraulic cylinder to hit the generation of cylinder phenomenon, prolonged the working life of oil hydraulic cylinder.
Preferably, when said piston contacted with said cylinder bottom, at least 1/2 said oil through was in communication with the outside; And/or when said piston contacted with said guide sleeve, at least 1/2 said oil-through hole was in communication with the outside.
After two end in contact of piston and cylinder barrel; Leave oil-through hole or the oil through that is communicated with the external world, what guaranteed that cylinder barrel moves in the other direction carries out smoothly, under the situation that does not need the external force effect; Can pass through the conducting of hydraulic fluid port and logical hydraulic fluid port and extraneous oil circuit, realize the to-and-fro motion of piston.
Preferably, a plurality of said oil-through holes distribute along straight line, and said straight line parallel is in the axis of said cylinder barrel; And/or a plurality of said oil throughs distribute along straight line, and said straight line parallel is in the axis of said cylinder barrel.
Like this, be convenient on cylinder barrel, arrange oil-through hole and oil through, also be convenient to a plurality of oil-through holes are integrated into a hydraulic fluid port simultaneously; And a plurality of oil throughs are integrated into a hydraulic fluid port; Reduce the physical dimension of integrated valve block, alleviate the weight of oil hydraulic cylinder and system, guarantee the sealing that hydraulic jack is connected with pipeline; Reduce and leak, improve hydraulic efficiency.
Preferably, said a plurality of oil-through holes equidistantly distribute, and/or said a plurality of oil throughs equidistantly distribute.
A plurality of oil-through holes adopt equidistantly and distribute; Make piston when each oil-through hole of shielding, the stroke of motion is identical, and is more even to the buffer function of piston; Guarantee that the movement velocity that progressively reduces piston stops until piston fully, desirable more to the cushioning effect of oil hydraulic cylinder rod chamber; A plurality of oil throughs adopt equidistantly and distribute; Make piston when each oil through of shielding, the stroke of motion is identical, and is more even to the buffer function of piston; Guarantee that the movement velocity that progressively reduces piston stops until piston fully, desirable more to the cushioning effect of oil hydraulic cylinder rodless cavity.
Preferably, the aperture of said a plurality of oil-through holes is identical, and/or the aperture of said a plurality of oil throughs is identical.
Like this, in the process of a plurality of oil-through holes of processing, the aperture of each oil-through hole is constant, need not change cutter, improves work efficiency; In the process of a plurality of oil throughs of processing, the aperture of each oil through is constant, need not change cutter, has improved the work efficiency of oil through, reduces production costs.
Further, the aperture of said oil-through hole is identical with the aperture of said oil through.
Like this, when a plurality of oil-through holes of processing and a plurality of oil through, need not change cutter, but the time processing moulding, and the work efficiency of raising oil-through hole and oil through further reduces production costs.
Preferably, this oil hydraulic cylinder also comprises the first valve piece and the second valve piece, and said first valve piece and the said second valve piece are installed on the outer wall of said cylinder barrel; The said first valve piece is integrated into a hydraulic fluid port with the outer end of said a plurality of oil-through holes; The said second valve piece is integrated into a hydraulic fluid port with the outer end of said a plurality of oil throughs.
Like this, utilize the first valve piece to be connected with an oil pipe a plurality of oil-through holes, a plurality of oil throughs utilize the second valve piece to be connected with an oil pipe, have reduced the usage quantity of oil pipe, simplify the structure of oil hydraulic cylinder and hydraulic system, reduce equipment cost simultaneously.
Preferably, said piston is provided with first boss towards an end of said cylinder bottom, when said piston contacts with said cylinder bottom, also leaves a ring cavity between said piston and the said cylinder bottom; And/or said guide sleeve is provided with second boss towards an end of said piston, when said piston contacts with said guide sleeve, also leaves a ring cavity between said piston and the said guide sleeve.
Like this, piston is with before cylinder bottom contacts, and ring cavity and at least one oil through UNICOM can discharge hydraulic oil, make things convenient for piston to contact with cylinder bottom; Piston is with before guide sleeve contacts, another ring cavity can with at least one oil-through hole UNICOM, hydraulic oil is discharged, make things convenient for piston to contact with guide sleeve.
In sum, technique scheme provided by the invention, novel structure, practicality; A plurality of oil-through holes and/or oil through are set on cylinder barrel, utilize oil clot to be connected, through piston and cooperating of cylinder barrel shielding oil-through hole or oil through one by one with oil pipe; Regulated oil damping; Realize the cushioning effect of rod chamber or rodless cavity, simple in structure, cost is low; Can regulate the buffering damping easily, realize different cushioning effects.
Description of drawings
Fig. 1 is the structural representation according to an embodiment of oil hydraulic cylinder according to the invention;
Fig. 2 be among Fig. 1 A-A to analysing and observe intention.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with accompanying drawing and embodiment.Need to prove that under the situation of not conflicting, the application's embodiment and the characteristic among the embodiment can make up each other.
A lot of details have been set forth in the following description so that make much of the present invention; But; The present invention can also adopt and be different from other modes described here and implement, and therefore, protection scope of the present invention does not receive the restriction of following disclosed specific embodiment.
As illustrated in fig. 1 and 2; The invention provides a kind of oil hydraulic cylinder; Comprise cylinder barrel 1, be arranged at cylinder barrel 1 one ends cylinder bottom 2, be arranged at cylinder barrel 1 the other end guide sleeve 3, be arranged at cylinder barrel 1 inner piston 4 and piston rod 5; One end of piston rod 5 connects with piston 4, and the other end of piston rod 5 passes guide sleeve 3 and extends to cylinder barrel 1 outside, and piston 4 is divided into rod chamber 11 and rodless cavity 12 with the inner chamber of cylinder barrel 1; The cylinder barrel 1 of forming rod chamber 11 is provided with a plurality of oil-through holes 13 and/or forms on the cylinder barrel 1 of rodless cavity 12 a plurality of oil throughs 14 are set; A plurality of oil-through holes 13 and/or a plurality of oil through 14 be along the axial distribution of cylinder barrel 1, and piston 4 can be opened a plurality of oil throughs 14 successively and/or cover a plurality of oil-through holes 13 successively during by the lateral movement at a side direction guide sleeve 3 places at cylinder bottom 2 places.
In this technological scheme; Remove the essential cylinder barrel of oil hydraulic cylinder, be arranged at said cylinder barrel one end cylinder bottom, be arranged at the said cylinder barrel the other end guide sleeve, be arranged at said cylinder barrel inner piston and piston rod; Do not increase any component; Simple in structure, practical, can not make oil hydraulic cylinder become complicated, can not increase the cost of oil hydraulic cylinder.Than on piston rod, processing oil drainage hole; Scheme provided by the invention on cylinder barrel, process oil-through hole with or oil through, difficulty of processing is low, processes and make convenient; Realized the buffer function of oil hydraulic cylinder cylinder barrel; Through progressively eliminating caused impact of said piston inertia power and the caused impact of pressure, effectively avoided oil hydraulic cylinder to hit the generation of cylinder phenomenon, prolonged the working life of oil hydraulic cylinder.
As shown in Figure 2, when piston 4 contacted with cylinder bottom 2, at least 1/2 oil through 14 was in communication with the outside; And/or when piston 4 contacted with guide sleeve 3, at least 1/2 oil-through hole 13 was in communication with the outside.
After two end in contact of piston and cylinder barrel; Leave oil-through hole or the oil through that is communicated with the external world, what guaranteed that cylinder barrel moves in the other direction carries out smoothly, under the situation that does not need the external force effect; Can pass through the conducting of hydraulic fluid port and logical hydraulic fluid port and extraneous oil circuit, realize the to-and-fro motion of piston.
As shown in Figure 2, further, a plurality of oil-through holes 13 distribute along straight line, and straight line parallel is in the axis of cylinder barrel 1; And/or a plurality of oil throughs 14 distribute along straight line, and straight line parallel is in the axis of cylinder barrel 1.
Like this, be convenient on cylinder barrel, arrange oil-through hole and oil through, also be convenient to a plurality of oil-through holes are integrated into a hydraulic fluid port simultaneously; And a plurality of oil throughs are integrated into a hydraulic fluid port; Reduce the physical dimension of integrated valve block, alleviate the weight of oil hydraulic cylinder and system, guarantee the sealing that hydraulic jack is connected with pipeline; Reduce and leak, improve hydraulic efficiency.
As shown in Figure 2, preferably, a plurality of oil-through holes 13 equidistantly distribute, and/or a plurality of logical oily 14 holes equidistantly distribute.
A plurality of oil-through holes adopt equidistantly and distribute; Make piston when each oil-through hole of shielding, the stroke of motion is identical, and is more even to the buffer function of piston; Guarantee that the movement velocity that progressively reduces piston stops until piston fully, desirable more to the cushioning effect of oil hydraulic cylinder rod chamber; A plurality of oil throughs adopt equidistantly and distribute; Make piston when each oil through of shielding, the stroke of motion is identical, and is more even to the buffer function of piston; Guarantee that the movement velocity that progressively reduces piston stops until piston fully, desirable more to the cushioning effect of oil hydraulic cylinder rodless cavity.
Preferably, the aperture of a plurality of oil-through holes 13 is identical, and/or the aperture of a plurality of oil throughs 14 is identical.
Like this, in the process of a plurality of oil-through holes 13 of processing, the aperture of each oil-through hole 13 is constant, need not change cutter, improves work efficiency; In the process of a plurality of oil throughs 14 of processing, the aperture of each oil through 14 is constant, need not change cutter, has improved the work efficiency of oil through, reduces production costs.
Preferably, the aperture of oil-through hole 13 is identical with the aperture of oil through 14.
Like this, when a plurality of oil-through holes 13 of processing and a plurality of oil through 14, need not change cutter, but the time processing moulding, and the work efficiency of raising oil-through hole 13 and oil through 14 further reduces production costs.
Preferably, this oil hydraulic cylinder comprises that also the first valve piece 6 and the second valve piece, 7, the first valve pieces 6 and the second valve piece 7 are installed on the outer wall of cylinder barrel; The first valve piece 6 is integrated into a hydraulic fluid port with the outer end of a plurality of oil-through holes 13; The second valve piece 7 is integrated into a hydraulic fluid port with the outer end of a plurality of oil throughs 14.
Like this, utilize the first valve piece to be connected with an oil pipe a plurality of oil-through holes, a plurality of oil throughs utilize the second valve piece to be connected with an oil pipe, have reduced the usage quantity of oil pipe, simplify the structure of oil hydraulic cylinder and hydraulic system, reduce equipment cost simultaneously.
As shown in Figure 2, piston is provided with first boss 41 towards an end of cylinder bottom 2, when piston 4 contacts with cylinder bottom 2, also leaves a ring cavity between piston 4 and the cylinder bottom 2; And/or guide sleeve 3 is provided with second boss 31 towards an end of piston 4, when piston 4 contacts with guide sleeve 3, also leaves a ring cavity between piston 4 and the guide sleeve 3.
Like this, piston is with before cylinder bottom contacts, and ring cavity and at least one oil through UNICOM can discharge hydraulic oil, make things convenient for piston to contact with cylinder bottom; Piston is with before guide sleeve contacts, another ring cavity can with at least one oil-through hole UNICOM, hydraulic oil is discharged, make things convenient for piston to contact with guide sleeve.
According to such scheme, the concrete working principle of oil hydraulic cylinder is:
When rodless cavity 12 oil-feeds, piston 4 moves to right with piston rod 5 one, when piston 4 during near end of travel; Its right side covers in first oil through of rod chamber 11 on the cylinder barrel 1; The fluid of rod chamber 11 is discharged resistance to be increased, and the inertia of opposing piston 4 and piston rod 5 descends its speed; Piston 4 further moves to right, and hides second oil through of rod chamber 11 on the cylinder barrel 1, and rod chamber 11 fluid are discharged resistance further to be increased, and piston 4 hides a plurality of oil throughs of rod chamber successively, piston 4 is stopped or bumping against slowly on the guide sleeve 3.
During the rod chamber oil-feed, piston 4 moves to left with piston rod 5 one, when piston 4 during near end of travel; Its left side covers in first oil-through hole of rodless cavity 12 on the cylinder barrel 1; The fluid of rodless cavity 12 is discharged resistance to be increased, and the inertia of opposing piston 4 and piston rod 5 descends its speed; Piston 4 further moves to left, and hides second oil-through hole of rodless cavity 12 on the cylinder barrel 1, and the fluid of rodless cavity 12 is discharged resistance further to be increased, and piston 4 hides a plurality of oil-through holes of rodless cavity successively, piston 4 is stopped or bumping against slowly on the cylinder bottom 2.
Among the present invention; Oil-through hole and oil through structure and function are all suitable; For the purpose of statement, adopted differentiation nominally, those skilled in the art be not to be understood that for oil-through hole and oil through be two kinds of various structure; Every this kind of employing structure realizes the scheme of oil hydraulic cylinder buffering purpose, all should be included within protection scope of the present invention.
On the other hand, the present invention also provides a kind of hydraulic system, comprises the oil hydraulic cylinder in the foregoing description.
On the one hand, the present invention also provides a kind of engineering machinery, comprises hydraulic jack or hydraulic system in the foregoing description again.
Technique scheme provided by the invention has following beneficial effect:
Novel structure, practicality are provided with a plurality of oil-through holes and/or oil through on cylinder barrel, utilize oil clot to be connected with oil pipe; Through piston and cooperating of cylinder barrel shielding oil-through hole or oil through one by one, regulated oil damping, realize the cushioning effect of rod chamber or rodless cavity; Simple in structure, cost is low; Can regulate the buffering damping easily, realize different cushioning effects.
In the present invention, term " a plurality of " refers to two or more, only if clear and definite qualification is arranged in addition.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. oil hydraulic cylinder; It is characterized in that; Comprise cylinder barrel (1), be arranged at said cylinder barrel (1) one end cylinder bottom (2), be arranged at said cylinder barrel (1) the other end guide sleeve (3), be arranged at said cylinder barrel (1) inner piston (4) and piston rod (5); One end of said piston rod (5) connects with said piston (4); The other end of said piston rod (5) passes said guide sleeve (3) and extends to said cylinder barrel (1) outside; Said piston (4) is divided into rod chamber (11) and rodless cavity (12) with the inner chamber of said cylinder barrel (1); The cylinder barrel (1) of forming said rod chamber (11) is provided with a plurality of oil-through holes (13) and/or forms on the cylinder barrel (1) of said rodless cavity (12) a plurality of oil throughs (14) are set; A plurality of said oil-through holes (13) and/or a plurality of said oil through (14) be along the axial distribution of said cylinder barrel (1), and said piston (4) can be opened a plurality of said oil throughs (14) successively and/or cover a plurality of said oil-through holes (13) successively during by the lateral movement at the said guide sleeve of a side direction (3) place at cylinder bottom (2) place.
2. oil hydraulic cylinder according to claim 1 is characterized in that, said piston (4) and said cylinder bottom (2) are when contacting, and at least 1/2 said oil through (14) is in communication with the outside; And/or said piston (4) and said guide sleeve (3) are when contacting, and at least 1/2 said oil-through hole (13) is in communication with the outside.
3. oil hydraulic cylinder according to claim 2 is characterized in that, a plurality of said oil-through holes (13) distribute along straight line, and said straight line parallel is in the axis of said cylinder barrel (1); And/or a plurality of said oil throughs (14) distribute along straight line, and said straight line parallel is in the axis of said cylinder barrel (1).
4. oil hydraulic cylinder according to claim 3 is characterized in that, said a plurality of oil-through holes (13) equidistantly distribute, and/or said a plurality of oil throughs (14) equidistantly distribute.
5. oil hydraulic cylinder according to claim 4 is characterized in that, the aperture of said a plurality of oil-through holes (13) is identical, and/or the aperture of said a plurality of oil throughs (14) is identical.
6. oil hydraulic cylinder according to claim 5 is characterized in that, the aperture of said oil-through hole (13) is identical with the aperture of said oil through (14).
7. according to each described oil hydraulic cylinder in the claim 1 to 6, it is characterized in that, also comprise the first valve piece (6) and the second valve piece (7), said first valve piece (6) and the said second valve piece (7) are installed on the outer wall of said cylinder barrel (1);
The said first valve piece (6) is integrated into a hydraulic fluid port with the outer end of said a plurality of oil-through holes (13); The said second valve piece (7) is integrated into a hydraulic fluid port with the outer end of said a plurality of oil throughs (14).
8. oil hydraulic cylinder according to claim 7; It is characterized in that; Said piston (4) is provided with first boss (41) towards an end of said cylinder bottom (2); Said piston (4) and said cylinder bottom (2) also leave a ring cavity between said piston (4) and the said cylinder bottom (2) when contacting; And/or said guide sleeve (3) is provided with second boss (31) towards an end of said piston (4), and said piston (4) and said guide sleeve (3) also leave a ring cavity between said piston (4) and the said guide sleeve (3) when contacting.
9. a hydraulic system is characterized in that, comprises like each described oil hydraulic cylinder in the claim 1 to 8.
10. an engineering machinery is characterized in that, comprises the hydraulic system described in each described oil hydraulic cylinder or claim 9 in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102908587A CN102777443A (en) | 2012-08-15 | 2012-08-15 | Hydraulic cylinder, hydraulic system and engineering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102908587A CN102777443A (en) | 2012-08-15 | 2012-08-15 | Hydraulic cylinder, hydraulic system and engineering machine |
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| Publication Number | Publication Date |
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| CN102777443A true CN102777443A (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102908587A Pending CN102777443A (en) | 2012-08-15 | 2012-08-15 | Hydraulic cylinder, hydraulic system and engineering machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452948A (en) * | 2013-09-10 | 2013-12-18 | 湖南工业大学 | Multi-stage concave-convex circular table piston hydraulic device capable of increasing bearing force |
| CN107553964A (en) * | 2017-10-24 | 2018-01-09 | 北京新龙立科技有限公司 | Tablet press |
| CN108757636A (en) * | 2018-09-10 | 2018-11-06 | 江阴市洪腾机械有限公司 | A kind of plunger piston fluid pressure cylinder of intermediate position oil inlet |
| CN108916155A (en) * | 2018-09-28 | 2018-11-30 | 王沛 | Composite hydraulic shift unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563368Y (en) * | 2002-08-02 | 2003-07-30 | 新昌县汇龙轴承有限公司 | Hydraulic cylinder |
| CN201671908U (en) * | 2010-05-25 | 2010-12-15 | 中航飞机起落架有限责任公司 | Actuator cylinder internally installed with buffer device |
| CN102042280A (en) * | 2010-12-30 | 2011-05-04 | 长沙中联消防机械有限公司 | Piston cylinder |
-
2012
- 2012-08-15 CN CN2012102908587A patent/CN102777443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563368Y (en) * | 2002-08-02 | 2003-07-30 | 新昌县汇龙轴承有限公司 | Hydraulic cylinder |
| CN201671908U (en) * | 2010-05-25 | 2010-12-15 | 中航飞机起落架有限责任公司 | Actuator cylinder internally installed with buffer device |
| CN102042280A (en) * | 2010-12-30 | 2011-05-04 | 长沙中联消防机械有限公司 | Piston cylinder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452948A (en) * | 2013-09-10 | 2013-12-18 | 湖南工业大学 | Multi-stage concave-convex circular table piston hydraulic device capable of increasing bearing force |
| CN107553964A (en) * | 2017-10-24 | 2018-01-09 | 北京新龙立科技有限公司 | Tablet press |
| CN107553964B (en) * | 2017-10-24 | 2024-01-23 | 北京新龙立智能科技有限公司 | Tablet press |
| CN108757636A (en) * | 2018-09-10 | 2018-11-06 | 江阴市洪腾机械有限公司 | A kind of plunger piston fluid pressure cylinder of intermediate position oil inlet |
| CN108916155A (en) * | 2018-09-28 | 2018-11-30 | 王沛 | Composite hydraulic shift unit |
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Application publication date: 20121114 |