EP2940291A1 - Axial piston motor - Google Patents

Axial piston motor Download PDF

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Publication number
EP2940291A1
EP2940291A1 EP13868490.7A EP13868490A EP2940291A1 EP 2940291 A1 EP2940291 A1 EP 2940291A1 EP 13868490 A EP13868490 A EP 13868490A EP 2940291 A1 EP2940291 A1 EP 2940291A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cylinder block
cylinder
housing
drive shaft
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.)
Withdrawn
Application number
EP13868490.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Arata Funasaka
Tsutomu Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Publication of EP2940291A1 publication Critical patent/EP2940291A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F04B1/20—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 rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0602—Component parts, details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0652—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0663—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0668—Swash or actuated plate
    • 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
    • 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
    • F04B1/20—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 rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels
    • 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
    • F04B1/20—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 rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating

Definitions

  • the present invention relates to an axial piston motor.
  • this axial piston motor includes a housing 100, a drive shaft 101 mounted to the housing 100 so as to be freely rotatable, a cylinder block 102 fixed to the drive shaft 101, a piston 103 fitted into a cylinder 102a of the cylinder block 102 so as to be capable of freely advancing and retreating, and a swash plate 104 supporting the piston 103 through a shoe 105.
  • the piston is reciprocally moved by supplying operation oil to the cylinder 102a. Then, the cylinder block 102 and the drive shaft 101 are rotated by reciprocally moving the piston 103.
  • the centrifugal force affects the contact pressure, and the heating value generated on the inner surface of the cylinder 102a becomes large. Accordingly, the operation oil escaped into the clearance cannot sufficiently cool the inner surface of the cylinder 102a. Further, as the centrifugal force increases, the piston 103 is pressed outward in a radial direction, and a width of the clearance on an outer side of the piston 103 in the radial direction is narrowed.
  • Patent Document 1 Japanese Patent No. 4828371
  • an object of the present invention is to provide an axial piston motor which is capable of preventing seizure of a piston and seizure of a cylinder and operating a cylinder block at high speed rotation and which is capable of preventing deterioration of performance due to an increase in an amount of operation oil leaked from the cylinder.
  • an axial piston motor comprising:
  • the nozzle for jetting operation oil is provided at the position opposite to the outer circumferential surface of the cylinder block.
  • the cylinder block can be operated at high speed rotation. Further, since the seizure of the piston and the seizure of the cylinder can be prevented without increasing a clearance between the piston and the cylinder, deterioration of performance due to an increase in an amount of the operation oil leaked from the cylinder can be prevented.
  • the outer circumferential surface of the cylinder block has a high temperature zone which has a temperature higher than a predetermined threshold value during rotation of the cylinder block, and the nozzle is opposed to the high temperature zone of the cylinder block.
  • the threshold value is a value in which seizure of at least one of the piston and the cylinder can occur between during the rotation of the cylinder block.
  • the operation oil can be sprayed from the nozzle to the high temperature zone, and the seizure of the piston and the seizure of the cylinder can be reliably prevented.
  • the high temperature zone of the cylinder block is in a set range where a center angle is from +40° to -40° when a bottom dead center of the piston is selected as a standard.
  • a positive direction of the center angle is a rotation direction of the cylinder block.
  • the high temperature zone becomes a zone where seizure can occur the most, the high temperature zone is in the set range. Therefore, the seizure can be reliably prevented by the jetting of the operation oil from the nozzle.
  • the nozzle is disposed outside the position at which the piston is at the bottom dead center in a radial direction, and as viewed in the axial direction of the drive shaft, a jetting direction of the nozzle intersects the set range of the cylinder block.
  • the nozzle since the nozzle is disposed outside the position where the piston is at the bottom dead center in the radial direction, and the jetting direction of the nozzle intersects the set range of the cylinder block, the nozzle can be disposed at the appropriate position.
  • the axial piston motor further comprises a plug screwed to the housing in a penetrated state, wherein the plug has the nozzle.
  • the attachment and removal of the nozzle to and from the housing can be easily performed by attaching and removing the plug to and from the housing.
  • the housing has a pair of main passages, which is connected to the cylinder and supplies and discharges the operation oil to the cylinder and a flushing valve, which is switched by pressure difference between the pair of main passages and guides the operation oil passing through the main passage on a low pressure side to the nozzle, is provided at the housing.
  • the motor can be made compact.
  • the nozzle for jetting operation oil is provided at the position opposite to the outer circumferential surface of the cylinder block.
  • Fig. 1 is sectional view illustrating an axial piston motor of one embodiment of this invention. As illustrated in Fig. 1 , this motor includes a housing 1, a drive shaft 3 mounted to this housing 1 through a bearing 2 so as to be freely rotatable, and a cylinder block 4 fixed to this drive shaft 3.
  • the cylinder block 4 has a plurality of cylinders 40 arrayed in a circumferential direction.
  • a plurality of pistons 5 is fitted into this plurality of cylinders 40 so as to be capable of freely advancing and retreating.
  • a tip part of the piston 5 is formed in a spherical shape and coupled to a shoe 6.
  • This shoe 6 is supported by a swash plate 7 positioned relatively to the housing 1.
  • This swash plate 7 has a tiltable surface relative to the drive shaft 3, and supports the plurality of pistons 5 by the tilted surface.
  • a tilting angle of this swash plate 7 relative to the drive shaft 3 is adjusted by a first control piston 81 and a second control piston 82.
  • the housing 1 has a cover 10 covering an end part side of the drive shaft 3.
  • a port 40a for supplying and discharging the operation oil to an inside of the cylinder 40 is formed at a bottom part of each cylinder 40.
  • An end surface of the cylinder block 4 is in contact with the valve plate 9.
  • the first main passage 11 of the cover 10, the first port 91 of the valve plate 9, and the port 40a of the predetermined cylinder 40 communicate with one another.
  • the second main passage 12 of the cover 10, the second port 92 of the valve plate 9, and the port 40a of the predetermined cylinder 40 communicate with one another.
  • a nozzle 21 for jetting the operation oil is arranged on an inner surface of the housing 1 and is provided at a position opposite to an outer circumferential surface of the cylinder block 4. This nozzle 21 is provided at a tip part of a plug 20. This plug 20 is screwed to the housing 1 in a penetrated state.
  • the nozzle 21 faces a nozzle passage 15 provided at the housing 1, and the nozzle passage 15 is connected to a flushing valve 30 provided at the cover 10 of the housing 1.
  • This flushing valve 30 is connected to a first sub-passage 13 communicated with the first main passage 11 and is connected to a second sub-passage 14 communicated with the second main passage 12.
  • This flushing valve 30 is switched by pressure difference between the first main passage 11 and the second main passage 12, and the operation oil passing through the main passage on a low pressure side is guided to the nozzle 21 via the nozzle passage 15.
  • an outer circumferential surface of the cylinder block 4 has a high temperature zone Z where a temperature can be higher than a predetermined threshold value during rotation of the cylinder block 4.
  • the threshold value is a value in which seizure of at least one of the piston 5 and the cylinder 40 can occur between during the rotation of the cylinder block 4.
  • the high temperature zone Z of the cylinder block 4 is in a set range R where a center angle is from +40° to -40° when a position L, at which the piston 5 is at a bottom dead center, is selected as a standard.
  • a positive direction of the center angle is a rotation direction of the cylinder block 4.
  • the bottom dead center of the piston 5 is a position where the piston 5 is protruded the most from the cylinder 40.
  • a line connecting a center of the piston 5 and a center of the drive shaft 3, which represents the bottom dead center, is selected as a standard line B
  • the set range R is a range where the center angle is from +40° to -40° around the standard line B.
  • the nozzle 21 is opposed to the high temperature zone Z of the cylinder block 4. Specifically speaking, as viewed in the axial direction of the drive shaft 3, the nozzle 21 is disposed outside the position L at which the piston 5 is at the bottom dead center in a radial direction. As viewed in the axial direction of the drive shaft 3, a jetting direction of the nozzle 21 intersects the set range R of the cylinder block 4. As viewed in the axial direction of the drive shaft 3, the jetting direction of the nozzle 21 coincides with a radial direction of the cylinder block 4 (the standard line B).
  • Fig. 3 illustrates a circuit diagram of the motor.
  • the first main passage 11 and the second main passage 12 are connected to a motor unit 50 including the drive shaft 3, the cylinder block 4, the piston 5, and the swash plate 7.
  • the first sub-passage 13 branched from the first main passage 11 is connected to a first port P1 of a spool 31 of the flushing valve 30, and the second sub-passage 14 branched from the second main passage 12 is connected to a second port P2 of the spool 31.
  • the nozzle passage 15 faced by the nozzle 21 is connected to a third port P3 of the spool 31.
  • the spool 31 is switched from the first position S1 to the second position S2 by a differential pressure between the high pressure operation oil in the first sub-passage 13 and the low pressure operation oil in the second sub-passage 14, and the second sub-passage 14 communicates with the nozzle passage 15.
  • the low pressure operation oil in the second sub-passage 14 can be jetted from the nozzle 21 to the motor unit 50.
  • the spool 31 is switched from the first position S1 to the third position S3 by a differential pressure between the high pressure operation oil in the second sub-passage 14 and the low pressure operation oil in the first sub-passage 13, and the first sub-passage 13 communicates with the nozzle passage 15.
  • the low pressure operation oil in the first sub-passage 13 can be jetted from the nozzle 21 to the motor unit 50.
  • the first and second control pistons 81, 82 may be driven by branching passages from the first sub-passage 13 and the second sub-passage 14 and flowing the operation oil into these pistons 81, 82 through the branch passages.
  • Fig. 4 is a sectional view of the flushing valve 30.
  • the spool 31 is fitted into a valve hole 32 provided at the cover 10 of the housing 1 so as to be freely slidable. Then, as illustrated by a solid arrow, when the high pressure operation oil is supplied to the first sub-passage 13, the spool 31 receives this high pressure operation oil and is moved to a right side in the drawing (the second position S2 in Fig. 3 ). As illustrated in dotted arrows, the low pressure operation oil is supplied from the second sub-passage 14 to the nozzle passage 15.
  • the nozzle 21 for jetting operation oil is provided at the position opposite to the outer circumferential surface of the cylinder block 4.
  • the cylinder block 4 can be operated at high speed rotation. Further, since the seizure of the piston 5 and the seizure of the cylinder 40 can be prevented without increasing a clearance between the piston 5 and the cylinder 40, deterioration of performance due to an increase in an amount of the operation oil leaked from the cylinder 40 can be prevented.
  • the operation oil can be sprayed from the nozzle 21 to the high temperature zone Z, and the seizure of the piston 5 and the seizure of the cylinder 40 can be reliably prevented.
  • the high temperature zone Z becomes a zone where seizure can occur the most, the high temperature zone Z is in the set range R. Accordingly, the seizure can be reliably prevented by the jetting of the operation oil from the nozzle 21.
  • the nozzle 21 is disposed outside in the radial direction of the position L at which the piston 5 is at the bottom dead center, and the jetting direction of the nozzle 21 intersects the set range R of the cylinder block 4. Accordingly, the nozzle 21 is disposed at the appropriate position.
  • the plug 20 is screwed to the housing 1, and the plug 20 has the nozzle 21. Accordingly, the attachment and removal of the nozzle 21 to and from the housing 1 can be easily performed by attaching and removing the plug 20 to and from the housing 1.
  • the flushing valve 30 is provided at the housing 1, the motor can be made compact.
  • the numbers of the piston 5 and the cylinder 40 may be increased and decreased.
  • the number of the nozzle 21 may be increased and decreased.
  • the set range R of the cylinder block 4 is a range where the center angle is from +40° to -40° around the standard line B.
  • the set range R may be a range where the center angle is from +15° to -15° around the standard line B.
  • the jetting direction of the nozzle 21 coincides with the radial direction of the cylinder block 4.
  • the jetting direction may be tilted in the radial direction of the cylinder block 4.
  • a specific numerical value of the set range R is not limited to this embodiment, and designs can be modified.
  • the jetting direction of the nozzle 21 coincides with the direction (the radial direction) orthogonal to the axis of the drive shaft 3.
  • a jetting direction of a nozzle 21 may be tilted in a range ⁇ of from +45° to -45° when a direction S orthogonal to an axis of a drive shaft 3 is selected as a standard.
  • the nozzle 21 is a part of the plug 20.
  • the nozzle 21 may be directly formed at the housing 1.
  • the nozzle may be opposed to a zone other than the high temperature zone.
  • the high temperature zone may be a range other than the range where the center angle is from +40° to -40°.
  • the nozzle may be disposed outside a position other than the position where the piston is at the bottom dead center in the radial direction.
  • the nozzle may be provided at a part other than the plug.
  • the flushing valve may be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP13868490.7A 2012-12-27 2013-11-26 Axial piston motor Withdrawn EP2940291A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012285032A JP2014126020A (ja) 2012-12-27 2012-12-27 アキシャルピストンモータ
PCT/JP2013/081730 WO2014103590A1 (ja) 2012-12-27 2013-11-26 アキシャルピストンモータ

Publications (1)

Publication Number Publication Date
EP2940291A1 true EP2940291A1 (en) 2015-11-04

Family

ID=51020684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13868490.7A Withdrawn EP2940291A1 (en) 2012-12-27 2013-11-26 Axial piston motor

Country Status (7)

Country Link
US (1) US20150000513A1 (https=)
EP (1) EP2940291A1 (https=)
JP (1) JP2014126020A (https=)
KR (1) KR20140126769A (https=)
CN (1) CN104379923A (https=)
IN (1) IN2014DN07165A (https=)
WO (1) WO2014103590A1 (https=)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6206513B2 (ja) * 2016-01-14 2017-10-04 株式会社豊田自動織機 可変容量型斜板式ピストンポンプ
JP6984825B2 (ja) 2017-01-13 2021-12-22 学校法人 関西大学 金属元素含有ナノ粒子を用いたヒドロシリル化による有機ケイ素化合物の製造方法
JP7476060B2 (ja) * 2020-09-14 2024-04-30 株式会社小松製作所 バルブプレート、シリンダブロック、油圧モータ
US11994117B2 (en) * 2021-10-04 2024-05-28 Hamilton Sundstrand Corporation Variable positive displacement pump actuator systems

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JP5444088B2 (ja) * 2010-03-31 2014-03-19 川崎重工業株式会社 バルブプレート、並びにこれを備えたアキシャルピストン式油圧ポンプ・モータ
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Also Published As

Publication number Publication date
CN104379923A (zh) 2015-02-25
US20150000513A1 (en) 2015-01-01
IN2014DN07165A (https=) 2015-04-24
KR20140126769A (ko) 2014-10-31
WO2014103590A1 (ja) 2014-07-03
JP2014126020A (ja) 2014-07-07

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