CN101573532A - Hydraulic piston engine - Google Patents
Hydraulic piston engine Download PDFInfo
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- CN101573532A CN101573532A CNA200780049390XA CN200780049390A CN101573532A CN 101573532 A CN101573532 A CN 101573532A CN A200780049390X A CNA200780049390X A CN A200780049390XA CN 200780049390 A CN200780049390 A CN 200780049390A CN 101573532 A CN101573532 A CN 101573532A
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- tension spring
- described hydraulic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/16—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a hydraulic piston engine comprising at least one swash plate or wobble plate on which a plurality of pistons are supported, said pistons each being pre-stressed against the swash or wobble plate over a sliding block. According to the invention, the pistons are pre-stressed against the swash or wobble plate by the force of at least one tension spring guided in sections inside the piston. An end section of the tension spring is supported on at least one abutment shoulder of a piston insert arranged in the piston, and surrounds said insert at least in sections.
Description
The present invention relates to a kind of hydraulic piston engine as described in the preamble according to claim 1.
A kind of double pendulum Moving plate machine is for example disclosed in DE 102004060954A1.Accommodate a plurality of pistons in this double pendulum Moving plate machine in a fixing tube, these pistons are directed in tube respectively in pairs inversely, and limit a shared working space.Realize moving axially of reverse piston by two wobble-plates that are provided with in the tube both sides.These wobble-plates are not connected with live axle with relatively rotating.Each piston is supported on by piston shoes that are provided with through hole attaches troops to a unit on its wobble-plate, and wherein, a capillary tube passes piston.Pressure medium is transported on the slidingsurface of piston shoes by this capillary tube, like this, this piston shoes static pressure ground is supported.Piston withstands swash plate or wobble-plate ground by pretension by that act on respectively and the plate of the pulling back spring pretension on piston shoes in this disclosed scheme, and these piston shoes just can not lift from the wobble-plate of attaching troops to a unit in suction stroke like this.By the Aspirating valves in the end segments of a working space side that is accommodated in piston pressure medium is transported in the working space respectively.This Aspirating valves limits a pressure space respectively.This pressure space is connected by being set to the inclined hole in the piston pin and the air-breathing connecting tube of axial piston machine.For the head pressure medium radially or axially is provided with pressure valve in piston cylinder between working space and a pressure connection tube.Shortcoming in such piston machine is that piston has bigger dead volume.This dead volume can cause axial piston machine volumetric efficiency degenerate and huge noise level.In addition also has such shortcoming, promptly because the plate of pulling back is the spring pretension, so such piston machine is expensive especially on manufacturing technology.It is for piston shoes being withstood wobble-plate ground pretension that requirement has the plate of pulling back of spring pretension, and prevents that when the piston suction stroke it from lifting from wobble-plate.
Disclose and a kind of the piston inserts has been installed to way in the piston in order to reduce dead volume WO 96/01946A1.These their excircles of piston inserts are provided with and are used for providing pressure medium to piston shoes, and are designed to spiral pressure medium channel.The output of the input of pressure medium and pressure medium is to finish by the Aspirating valves and the pressure valve that are designed to guiding valve in this disclosed scheme.The slide valve buckle of these valves leads on the excircle of the piston that is arranged in cylinder or piston cylinder.Such piston machine is because the spring pretension of the plate of pulling back also is very expensive on manufacturing technology.
Therefore task of the present invention provides a kind of like this hydraulic piston engine, and equipment and technology cost that can be minimum in this piston machine reaches hydraulic slip and minimizes.
This task is accomplished by a kind of hydraulic piston engine with claim 1 feature.
Piston machine according to the present invention has at least one swash plate or wobble-plate.Many pistons are supported on this dish.These pistons withstand swash plate or wobble-plate ground by pretension by piston shoes respectively.According to the present invention, these pistons are tensioned by the power of the tension spring that at least one is directed in the inside of piston with becoming section with withstanding swash plate or wobble-plate, wherein, the end segments of tension spring is supported at least one backstop convex shoulder that is arranged on the piston inserts in the piston, and becomes section ground to enclose this piston inserts of card at least.So in this scheme owing to can abandon being used to withstanding the plate of pulling back that swash plate or wobble-plate make the spring pretension of piston shoes pretension at the tension spring of the guided inside of piston.The piston inserts has reduced the interior space of piston respectively, and has filled the inner cavity chamber of tension spring with becoming section at least, so just makes that dead volume has minimized.
One according to design of the present invention in piston machine have can reverse operation, and limit the piston of a shared working space.These pistons withstand a swash plate or wobble-plate ground pretension with piston shoes respectively by at least one shared tension spring, and wherein, the end segments of tension spring is supported on respectively on the backstop convex shoulder of a piston inserts of piston.For example piston machine is designed to double pendulum Moving plate pump or diclinic dish piston machine, this pump advantageously can be two sense of rotation operations.
The backstop convex shoulder is respectively formed on the radial flange of piston inserts in one embodiment of the invention.This radial flange has one and the opposed support convex shoulder of this backstop convex shoulder.Support the convex shoulder upper support at this and a end segments with second tension spring of the spring constant littler than first tension spring.The tension spring that is arranged on the centre with bigger spring constant is effective for first portion's stroke of piston, and is preferably effective in about zone of 30% to 50% of total stroke length, relaxes basically then.Tension spring with two outsides of less spring constant centers for respectively the piston inserts, and with smaller power to swash plate or wobble-plate ground externally in the zone at dead point with the piston pretension.The smaller power with respect to middle tension spring of external tensile spring is enough, because piston does not need further acceleration (V=0 when reaching outer dead) when reaching outer dead.Preferably more weak spring is just effective from 30% to 50% running length of total kilometres.It is favourable stoping piston to lift from swash plate or wobble-plate by a stronger tension spring in this scheme, wherein, owing to the action length of the tension spring with big spring constant is limited, so reduced with respect to a diameter at the strong spring spring of whole running length pretension piston.
In according to one embodiment of present invention, the radial flange of piston inserts and a block of piston are contacted by the power that has than the middle tension spring of big spring constant.The block of the piston preferably zone design of a radial expansion of the inwall by piston is the backstop convex shoulder.
If piston inserts, piston and/or piston shoes are that particularly cfrp is made by anti abrasive plastics at least, then can reduce the weight of piston machine.So because optimization by weight has reduced the efficient that inertia has improved piston machine.The plastics inserts has reduced dead volume in a metallic piston that becomes section ground auger sky, and weight be unlikely to as solid piston or bore so big in the more shallow piston of the degree of depth.
If the plastic components of piston machine is to make then prove it is being particularly advantageous aspect the manufacturing technology by the pressure injection method.The mechanical following process of structure member can be dropped to minimum by this measure, perhaps can eliminate, make the favourable manufacturing piston machine of cost become possibility like this.
The section of one-tenth ground is overlapping at least for the piston inserts that is provided with in reverse piston mobile according to a particularly preferred embodiment, and can move axially alternately.In this case, if the piston inserts has the support protrusion (supporting leg) that is directed to alternately slidably, and these support that protruding to replenish into one be columniform substantially, and the common supporting section that passes tension spring proves particularly advantageous.In other words, the piston inserts leads on its whole length to tension spring in double pump, and wherein, tension spring is directed on the whole running length of piston by the axially movable property of piston inserts.
The piston inserts extends in the working space with becoming section, and tension spring also supports by the piston inserts in this zone like this, and prevents the bending of tension spring.
Support protrusion preferably has one respectively and is fan-shaped cross section substantially.The piston inserts is provided with misplace the each other support protrusion of 120 ° of settings of three difference in one of piston machine preferred design.The backstop convex shoulder preferably is formed in the zone of support protrusion.
The piston inserts preferably has at least one space, through hole particularly, and this through hole feeds working space in a side, feeds in the slidingsurface of piston shoes at opposite side, and forms the connection set of a pressure medium.Pressure medium is transported in the slidingsurface of piston shoes by this space, is supported on swash plate or the wobble-plate like this this piston shoes static pressure.
The theme that other favourable improvement project of the present invention is other dependent claims.
By accompanying drawing preferred embodiments more of the present invention are described in more details below.These accompanying drawings are:
Fig. 1: according to one first an embodiment's of the present invention part sketch that is designed to the piston machine of double pendulum Moving plate pump.
The parts drawing of the piston inserts of Fig. 2: Fig. 1.
The plan view of the piston inserts of Fig. 3: Fig. 2.
The longitdinal cross-section diagram of the piston inserts of Fig. 4: Fig. 2.
Fig. 5: a part schematic representation that is designed to the piston machine of double pendulum Moving plate pump according to another embodiment of the present invention.
Fig. 1 illustrates a part schematic representation that is designed to the piston machine of double pendulum Moving plate pump 1.Such pump 1 mainly is arranged on a piston cylinder 2 in the unshowned housing by one and constitutes.This piston cylinder is passed in many cylinder holes 4 that are positioned at a parallel axes on the common standard pitch circle.Described cylinder hole imports the end face 6,8 of piston cylinder 2 respectively, and hold respectively two can reverse motion piston 10,12.These two pistons stretch out with the end face separately 6,8 of piston pin 14,16 from piston cylinder 2.These piston pin 14,16 are spherical designs, and respectively support piston shoes 18,20.The piston 10 that stretches out from the left side 6 of piston cylinder 2 in Fig. 1 is supported on one first wobble-plate 22 by piston shoes 18, and the piston 12 that stretches out from right side 8 is supported on one second wobble-plate 24 by piston shoes 20.Wobble- plate 22,24 is not connected with a unshowned live axle of pump 1 with not relatively rotating.This live axle is bearing in the housing by the axial/radial bearing.Have the axial force that is occurred in the structure of symmetrically arranged wobble- plate 22,24 and be incorporated in the live axle symmetrically such, and by this drive shaft bearing, like this, alleviated the load of the bearing structure of housing and moving element, therefore can design forr a short time than the simple wobble-plate pump that only has a wobble-plate.A reverse piston motion of passing through piston in intake stroke becomes big, and the working space 28 that diminishes in the compression stroke is subjected to being contained in respectively the restriction of the end segments toward each other of the piston in the cylinder hole 4 in the axial direction, wherein, these end segments are arranged in the zone at dead point of their inside.Pressure medium can be transported in the described working space by a suction connecting tube, and pressure medium can be discharged (not shown) from working space by a pressure connection tube.Each piston 10,12 all has one and is roughly columnar piston skirt 26,30.These piston skirts carry out the transition to spherical piston pin 14,16 by a contraction section 32,34.This piston pin and piston shoes 18, the 20 universal ball joint formulas ground engagement of being attached troops to a unit.Described piston shoes 18,20 slidingsurfaces 36,38 with it own abut on the end face 40,42 of wobble- plate 22,24.
Piston 10,12 withstands wobble- plate 22,24 ground by pretension by the power of a tension spring 44 that is directed in the inside of piston 10,12 with becoming section, like this, piston shoes 18,20 just can not lift from the wobble- plate 22,24 of attaching troops to a unit in intake stroke, wherein, the end segments 46,48 of tension spring 44 is supported on the backstop convex shoulder 50,52 of the piston inserts 54,56 that is separately positioned in the piston 10,12, and becomes section ground to enclose this piston inserts of card.Piston inserts 54,56 has reduced the internal piston space of piston 10,12, and has filled the inner space of tension spring 44, makes that like this dead volume minimizes, and has improved efficient widely and reduced noise.Owing to there has been tension spring 44 just can save for the plate of pulling back to the spring pretension of the piston shoes 18,20 of wobble- plate 22,24 pretensions.The structure of pump 1 can be simplified by this measure, wherein, piston shoes 18,20 can be freely designed.Piston inserts 54,56 is provided with one and forms the through hole 58 that a kind of pressure medium connects.This through hole imports in the working space 28 in a side, at opposite side by an attachment hole 60, import in the slidingsurface 36,38 of piston shoes 18,20 by a funnel shaped extension 62 of piston 10,12 and a pore 63 of piston shoes 18,20.Even why needing this funnel shaped extension 62 is also to keep when relative deviation occurring between piston shoes 18,20 and piston 10,12 pressure medium of slidingsurface 36,38 to be communicated with.Connect the slidingsurface 36,38 that pressure medium is transported to piston shoes 18,20 by pressure medium, like this these piston shoes with regard to static pressure be supported on the wobble- plate 22,24.
Characteristics of described scheme are piston inserts 54,56, piston 10,12 at least, also have piston shoes 18,20 by anti abrasive plastics, for example carbon fiber reinforced PEEK or POM make, and like this, double pendulum Moving plate pump 1 just has minimum weight and minimum moving-mass.So because optimization by weight has reduced the efficient that inertia has improved piston machine 1.So in having the piston machine of metallic piston since the piston inserts be to constitute by plastics also to have alleviated weight widely.On manufacturing technology be particularly advantageous be that the plastic construction parts of piston machine 1 are made by pressure injection.The machinery reprocessing of structure member can be dropped to minimum by this measure, perhaps can eliminate, making cost advantageously make piston machine 1 like this becomes possibility.The piston inserts 54,56 that in reverse piston mobile 10,12, is provided with can the section of the being staggered into earth's axis to moving, tension spring 44 is directed on the whole running length of piston 10,12 like this.Particularly advantageous in this case is that piston inserts 54,56 has the staggered support protrusion 64,66,68 (asking for an interview Fig. 2) of guiding slidably.It is columniform substantially that these support protrusion are replenished formation, and passes the supporting section 70 of tension spring 44.This tension spring 44 is directed to along the inwall 72 of the piston skirt 26,30 of piston 10,12 and the supporting section 70 of piston inserts 54,56.These piston inserts extend in the working space 28, and like this, tension spring 44 is also supported by piston inserts 54,56 in this zone, and prevents the bending of tension spring 44.
Fig. 2 individually illustrates piston inserts 54.These piston inserts have one and become section ground to be columniform base component 74.This base component has the end segments 76 of the suitable taper of and piston inner wall 72 (referring to Fig. 1).This piston inserts 54 is provided with three support protrusion 64,66,68 in working space one side in the embodiment shown.Replenish the basic columniform supporting section 70 that is together according to the support protrusion 64,66,68 of these support protrusion of Fig. 1 and opposed piston inserts 56.These support protrusion 64,66,68 are provided with a backstop convex shoulder 50 respectively.Tension spring 44 (referring to Fig. 1) just is supported on (piston inserts 56 structures of opposite side are identical, therefore illustrate no longer separately at this) on this convex shoulder.In other words, 54,56 section ground of piston inserts are overlapped, and like this, tension spring 44 supports by piston inserts 54,56 on its whole length, and prevents the bending of tension spring.
Fig. 3 illustrates the plan view of the piston inserts 54 of Fig. 2.Find out that in the figure these support protrusion 64,66,68 substantially misplace each other 120 ° respectively and are provided with in an illustrated embodiment, and have one and be roughly fan-shaped cross section.Wherein, the open-angle α of support protrusion 64,66,68 selects smallerly slightly than the open-angle β in adjacent space 78,80,82, and piston inserts 54,56 just can move axially in little gap slidably alternately like this.
Fig. 4 illustrates a longitdinal cross-section diagram of the piston inserts 54 of Fig. 2.The backstop convex shoulder 50 that is used for tension spring 44 according to this figure is formed on the zone of support protrusion 64,66,68.For tension spring 44 is installed easily, these support protrusion 64,66,68 are provided with an external importing inclined-plane 84 respectively.
Fig. 5 illustrates the part schematic representation of the piston machine 1 that is designed to double pendulum Moving plate pump according to another embodiment of the present invention.The main difference of this embodiment and previous embodiment is that the backstop convex shoulder 50,52 of tension spring 44 is respectively formed on the radial flange 86 of piston inserts 88,90.This radial flange has one and backstop convex shoulder 50,52 opposed support convex shoulders 92,94 respectively.Each one in this support convex shoulder upper support has than an end segments 96,98 of first tension spring, second tension spring 100.Described second tension spring has the spring constant more much smaller than first tension spring 44.These two tension springs 100 and the 44 coaxial settings of middle tension spring, and act on the bottom of piston 10,12 respectively.The radial flange 86 of piston inserts 88,90 contacts by having than the power of the tension spring 44 of big spring constant and a block 102 of piston 10,12 in zone shown in the inner dead centre of piston 10,12.The block 102 of piston 10,12 passes through to form as the radial expansion zone of the inwall 72 of the piston 10,12 of backstop convex shoulder.The supporting section 70 of piston inserts 88,90 has a corresponding bigger outer diameter in the zone of stronger tension spring 44.Yet block is not to be mandatory requirement for the function of piston machine 1 according to the present invention.Have bigger spring constant in the middle of the tension spring 44 that is provided with are off-loadings effectively and then for first portion's stroke of the piston 10,12 in about scope of 30 to 50% of total stroke length.Tension spring 100 with less spring constant centers for respectively piston inserts 88,90, and externally withstands wobble- plate 22,24 ground pretension pistons 10,12 with smaller power in the zone, dead point.Force rate with respect to tension spring 44 tension springs 100 with big spring constant is less, but is enough, because require when reaching the bottom dead- centre piston 10,12 is not continued to quicken (V=0 when reaching the bottom dead-centre).More weak tension spring 100 just from 30 to 50% running length of whole stroke just effectively when tension spring 44 is lax.The advantage of this scheme is to prevent that by stronger tension spring 44 piston 10,12 from lifting from wobble- plate 22,24, wherein, because the action length with tension spring 44 of big spring constant is restricted, thus with one on whole running length the strong spring of pretension piston 10,12 compare spring diameter and reduced.
In this embodiment of the present invention, also can so design these piston inserts 88,90, be that these piston inserts overlap each other with becoming section, like this, tension spring 44 supports by piston inserts 88,90 on its whole length, and prevents the bending of tension spring 44.
Piston machine 1 according to the present invention is not limited to described embodiment, but also working machine 1 can be designed to the single-deck semirotary pump, perhaps swash plate pump, wherein, in piston cylinder 2, have only piston 10 to be directed to with moving axially, and abut on unique wobble-plate or the swash plate 22 by piston shoes 18.Provide compressive force in a side in such scheme, for housing, yet the advantage of this scheme is that this pump can design shortlyer on axial side's direction.
A kind of hydraulic piston engine 1 with at least one swash plate or wobble- plate 22,24 is disclosed. Many pistons 10,12 in the dish upper support.These pistons respectively by piston shoes 18,20 withstand on swash plate or the wobble- plate 22,24 by pretension.According to the present invention piston 10,12 by at least one become the power of the tension spring 44,100 that section ground is directed in the inside of piston 10,12 withstand on swash plate or the wobble- plate 22,24 by pretension, wherein, the end segments 46,48 of tension spring 44 is supported at least one backstop convex shoulder 50,52 that is arranged on the piston inserts 54,56,88,90 in the piston 10,12, and becomes section ground to enclose this piston inserts of card at least.
Claims (15)
1. hydraulic piston engine, have at least one swash plate or wobble-plate (22,24), a plurality of pistons (10,12) be supported on this dish, these piston restraint of labour spaces (28), these pistons (10,12) respectively by piston shoes (18,20) withstand swash plate or wobble-plate (22,24) by pretension, it is characterized in that, these pistons (10,12) become section ground at piston (10 by at least one, 12) tension spring (44 that inside is directed to, 100) power is withstood swash plate or wobble-plate (22,24) by pretension, the end segments (46 of tension spring (44), 48) be supported on and be arranged on piston (10,12) the piston inserts (54 in, 56,88,90) at least one backstop convex shoulder (50,52) on, and become section ground to enclose this piston inserts of card at least.
2. according to the described hydraulic piston engine of claim 1, wherein, piston inserts (54,56,88,90), piston (10,12) and/or piston shoes (18,20) are made of plastics at least, are particularly made by cfrp.
3. according to claim 1 or 2 described hydraulic piston engines, having can reverse motion, and limit the piston (10,12) of common working space (28), these pistons (10,12) use piston shoes (18,20) to withstand swash plate or wobble-plate (22,24) by pretension respectively by at least one common tension spring (44).
4. according to the described hydraulic piston engine of claim 3, wherein, the end segments of tension spring (44) (46,48) is supported on respectively on the backstop convex shoulder (50,52) of piston inserts (54,56,88,90) of piston (10,12) that can reverse motion.
5. according to the described hydraulic piston engine of claim 4, wherein, backstop convex shoulder (50,52) be formed on the radial flange (86) of piston inserts (88,90), this radial flange has and the opposed support convex shoulder of backstop convex shoulder (50,52) (92,94), and at least one end segments (96,98) with second tension spring (100) of the spring constant littler than first tension spring (44) is supported on respectively on this support convex shoulder.
6. according to the described hydraulic piston engine of claim 5, wherein, the power of the tension spring (44) of the radial flange (86) of piston inserts (88,90) by having bigger spring constant can contact with the block (102) of piston (10,12).
7. according to claim 5 or 6 described hydraulic piston engines, wherein, having more, the tension spring of big spring constant (44) in about scope of 30% to 50% of whole running length, is effective preferably for first portion's stroke of piston (10,12).
8. according to each described hydraulic piston engine of claim 3 to 7, wherein, piston inserts (54,56) covers at least in part each other.
9. according to each described hydraulic piston engine of claim 3 to 8, wherein, it is cylindrical shape and the supporting section (70) that passes tension spring (44) that the support protrusion (64,66,68) of piston inserts (54,56) is replenished basic.
10. according to the described hydraulic piston engine of claim 9, wherein, support protrusion (64,66,68) has the basic fan-shaped cross section that is respectively.
11. according to each described hydraulic piston engine of claim 9 or 10, wherein, piston inserts (54,56) has the support protrusion (64,66,68) of three about 120 ° of settings that misplace each other respectively.
12. according to each described hydraulic piston engine of claim 9 to 11, wherein, backstop convex shoulder (50,52) forms in the zone of support protrusion (64,66,68).
13. according to each described hydraulic piston engine of aforementioned claim, wherein, piston inserts (54,56) has at least one space (58), particularly through hole of forming the pressure medium joint.
14. according to each described hydraulic piston engine of aforementioned claim, wherein, piston inserts (54,56) extends in the working space (28) with becoming section.
15., wherein, make by pressure injection at the structure member described in the claim 2 (54,56,10,12,18,20) according to each described piston machine of aforementioned claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710001794 DE102007001794A1 (en) | 2007-01-05 | 2007-01-05 | Hydraulic piston machine |
| DE102007001794.6 | 2007-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101573532A true CN101573532A (en) | 2009-11-04 |
Family
ID=38799309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200780049390XA Pending CN101573532A (en) | 2007-01-05 | 2007-10-30 | Hydraulic piston engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2118485A1 (en) |
| CN (1) | CN101573532A (en) |
| DE (1) | DE102007001794A1 (en) |
| WO (1) | WO2008080444A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150957A (en) * | 2015-05-13 | 2016-11-23 | 罗伯特·博世有限公司 | Piston shoes for hydrostatic axial piston machine |
| CN108167175A (en) * | 2017-12-22 | 2018-06-15 | 重庆广林机械有限公司 | A kind of piston shoes baffle |
| CN108302001A (en) * | 2018-03-12 | 2018-07-20 | 西北工业大学 | A kind of Novel plunger pump |
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| US3319576A (en) | 1965-09-24 | 1967-05-16 | Jr Elias Orshansky | Free plate motor or pump |
| US4898077A (en) | 1988-09-06 | 1990-02-06 | Teleflex Incorporated | Self-bleeding hydraulic pumping apparatus |
| DE4301120C2 (en) * | 1993-01-18 | 1995-06-01 | Danfoss As | Pressure device in a hydraulic axial piston machine |
| PL173937B1 (en) | 1994-07-12 | 1998-05-29 | Andrzej Osiecki | Multiple-plunger hydrostatic axial machine |
| US5568762A (en) * | 1995-04-12 | 1996-10-29 | Caterpillar Inc. | Stabilizing device for variable displacement axial piston pumps |
| JP3894463B2 (en) | 1997-10-20 | 2007-03-22 | カヤバ工業株式会社 | Axial piston pump or motor |
| DE102004060954A1 (en) | 2004-12-17 | 2006-06-29 | Bosch Rexroth Ag | Hydraulic piston machine |
-
2007
- 2007-01-05 DE DE200710001794 patent/DE102007001794A1/en not_active Withdrawn
- 2007-10-30 WO PCT/EP2007/009391 patent/WO2008080444A1/en active Application Filing
- 2007-10-30 CN CNA200780049390XA patent/CN101573532A/en active Pending
- 2007-10-30 EP EP07819432A patent/EP2118485A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150957A (en) * | 2015-05-13 | 2016-11-23 | 罗伯特·博世有限公司 | Piston shoes for hydrostatic axial piston machine |
| CN108167175A (en) * | 2017-12-22 | 2018-06-15 | 重庆广林机械有限公司 | A kind of piston shoes baffle |
| CN108302001A (en) * | 2018-03-12 | 2018-07-20 | 西北工业大学 | A kind of Novel plunger pump |
| CN108302001B (en) * | 2018-03-12 | 2023-09-22 | 西北工业大学 | Plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007001794A1 (en) | 2008-07-10 |
| WO2008080444A1 (en) | 2008-07-10 |
| EP2118485A1 (en) | 2009-11-18 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20091104 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |