JP3375332B2 - Hydraulic pump - Google Patents
Hydraulic pumpInfo
- Publication number
- JP3375332B2 JP3375332B2 JP2000595057A JP2000595057A JP3375332B2 JP 3375332 B2 JP3375332 B2 JP 3375332B2 JP 2000595057 A JP2000595057 A JP 2000595057A JP 2000595057 A JP2000595057 A JP 2000595057A JP 3375332 B2 JP3375332 B2 JP 3375332B2
- Authority
- JP
- Japan
- Prior art keywords
- shoe
- elastic
- cylinder
- hydraulic pump
- groove
- 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.)
- Expired - Fee Related
Links
- 239000012530 fluid Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining 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
- F04B1/128—Driving 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
- 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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/11—Kind or type liquid, i.e. incompressible
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【発明の属する技術分野】
本発明は液圧ポンプに関し、より詳しくは、適切な方
法で一つだけの部材によってシュー(shoe)をホルディ
ングする機能を遂行することができる液圧ポンプに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pump, and more particularly, to a hydraulic pump capable of performing a function of holding a shoe with only one member in an appropriate manner.
一般に、液圧ポンプは高圧ポンピングのための目的に
用いられ、傾斜面を有する斜板部材とシューを有するピ
ストン部材とを備えている。このような構造において、
ピストン部材のシューが装置全体の高圧ポンピング作用
を適切に誘導するためには斜板部材(wobble plate mem
ber)の傾斜面と堅固に接触しなければならないので、
シューホルディングメカニズムはこのような目的のため
に使用される。
図4は斜板(wobble plate)を有する液圧ポンプの断
面図である。この液圧ポンプは多数の流体通路52、5
4とシャフトベアリングホール57を有する円筒形状の
溝56を有するケース58とを含み、シャフト50が回
転できるように前記溝56のシャフトベアリングホール
57に挿入される。多数のシリンダー部材60がそれぞ
れシリンダーホール62を有し前記ケース58の溝56
に配置されて、前記シャフト50の回転力を受けて回転
できる。さらに、前記各シリンダー部材60は前記シリ
ンダーホール62と前記流体通路52、54との間を流
体が通過できるようにするための通過ホール76を有す
る。ピストン部材64は前記各シリンダー部材60に配
置されてシリンダーホール62内で往復運動する。斜板
部材68は前記ケース58と結合されて前記溝56の開
口部を覆う。前記斜板部材68は定められた角度に傾い
た傾斜面66を形成する突出部65を有する。
前記ピストン部材64はシリンダーホール62内で往
復運動するピストン70と、シリンダー部材60の回転
と共に斜板部材68の傾斜面66に沿って移動してコネ
クティング部材74を経由して前記ピストン70に連結
されるシュー72を含む。前記コネクティング部材74
はボールジョイントで形成され前記シュー72が斜板部
材68の傾斜面に沿って自由に移動できるようにする。
シューホルダー78はシュー72が斜板部材68に密
着するようにシュー72の周囲に配置される。一対のカ
ラー80は一定の距離をおいてシリンダー部材60内に
位置され、この一対のカラー80の間に弾性部材82が
弾支されている。バレル部材86はシュー72に対して
シューホルダー78を支持するようにシャフト50とシ
ューホルダー78との間に挿入される。ピン部材84は
バレル部材86と隣接するカラー80との間に位置す
る。
上記液圧ポンプにおいて、弾性部材82から弾性力を
受けると、前記ピン部材84は斜板部材68の傾斜面6
6にシューホルダー78を押圧するようにバレル部材8
6に前記弾性力を伝達する。
これによって、ピストン部材64のシュー72は斜板
部材68の傾斜面66に密着しシリンダー部材60の回
転に伴って傾斜面66に沿って移動する。この時、ピス
トン部材64のピストン70はシリンダー部材60のシ
リンダーホール62内で往復移動する。このような作動
において、ピストン部材64のシュー72が傾斜面66
に沿って下側に移動する時、流体は流体流入通路52を
通じて通過ホール76を経由してシリンダーホール62
に流入する。その反面、シュー72が傾斜面66に沿っ
て上側に移動する時、シリンダーホール62に流入した
流体は通過ホール76を経由して流体排出通路54を通
じて排出される。このような方法で、液圧ポンプにおい
て所望の液圧を得ることができる。Generally, a hydraulic pump is used for the purpose of high-pressure pumping, and includes a swash plate member having an inclined surface and a piston member having a shoe. In such a structure,
In order for the shoe of the piston member to properly induce the high-pressure pumping action of the entire device, it is necessary to use a wobble plate mem.
ber) must be in firm contact with the inclined surface,
The shoe-holding mechanism is used for this purpose. FIG. 4 is a sectional view of a hydraulic pump having a wobble plate. This hydraulic pump has a number of fluid passages 52,5.
4 and a case 58 having a cylindrical groove 56 having a shaft bearing hole 57, which is inserted into the shaft bearing hole 57 of the groove 56 so that the shaft 50 can rotate. A large number of cylinder members 60 each have a cylinder hole 62 and the groove 56 of the case 58.
The shaft 50 can be rotated by receiving the rotational force of the shaft 50. Further, each of the cylinder members 60 has a passage hole 76 for allowing a fluid to pass between the cylinder hole 62 and the fluid passages 52 and 54. The piston member 64 is disposed in each of the cylinder members 60 and reciprocates in the cylinder hole 62. The swash plate member 68 is coupled to the case 58 to cover the opening of the groove 56. The swash plate member 68 has a protruding portion 65 forming an inclined surface 66 inclined at a predetermined angle. The piston member 64 is reciprocally moved in the cylinder hole 62, and moves along the inclined surface 66 of the swash plate member 68 as the cylinder member 60 rotates, and is connected to the piston 70 via the connecting member 74. The shoe 72 is included. The connecting member 74
Is formed of a ball joint and allows the shoe 72 to move freely along the inclined surface of the swash plate member 68. The shoe holder 78 is arranged around the shoe 72 so that the shoe 72 is in close contact with the swash plate member 68. The pair of collars 80 are positioned within the cylinder member 60 at a constant distance, and the elastic member 82 is elastically supported between the pair of collars 80. The barrel member 86 is inserted between the shaft 50 and the shoe holder 78 so as to support the shoe holder 78 with respect to the shoe 72. The pin member 84 is located between the barrel member 86 and the adjacent collar 80. In the above hydraulic pump, when the elastic force is applied from the elastic member 82, the pin member 84 causes the swash plate member 68 to have the inclined surface 6
Barrel member 8 so as to press shoe holder 78 against 6.
The elastic force is transmitted to 6. As a result, the shoe 72 of the piston member 64 comes into close contact with the inclined surface 66 of the swash plate member 68 and moves along the inclined surface 66 as the cylinder member 60 rotates. At this time, the piston 70 of the piston member 64 reciprocates in the cylinder hole 62 of the cylinder member 60. In such an operation, the shoe 72 of the piston member 64 causes the inclined surface 66 to move.
When moving downward along the flow path, the fluid passes through the fluid inflow passage 52, passes through the through hole 76, and moves into the cylinder hole 62.
Flow into. On the other hand, when the shoe 72 moves upward along the inclined surface 66, the fluid flowing into the cylinder hole 62 is discharged through the fluid discharge passage 54 via the passage hole 76. With such a method, a desired hydraulic pressure can be obtained in the hydraulic pump.
しかし、上記シューホルディングメカニズムはカラー
部材80、弾性部材82、ピン部材84、バレル部材8
6、シューホルダー78を含む多数のシューホルディン
グ要素によって構造が複雑になり、製造時間が永くなり
製造費用が高くなり、生産効率が悪くなる。何故ならば
前記シューホルディング要素のうちの一部はこのような
シューホルディングメカニズムに必ずしも必要なもので
はないと理解できるからである。However, the shoe-holding mechanism has a collar member 80, an elastic member 82, a pin member 84, and a barrel member 8.
6. A large number of shoe-holding elements including the shoe holder 78 complicates the structure, prolongs the manufacturing time, increases the manufacturing cost, and deteriorates the manufacturing efficiency. It is understood that some of the shoe-holding elements are not necessarily required for such a shoe-holding mechanism.
本発明の目的は1つの部材のみでシューホルディング
機能を効率的に遂行することができる液圧ポンプを提供
することにある。
このような目的は弾性シューホルダーを有する液圧ポ
ンプによって達成され得る。前記液圧ポンプは多数の流
体通路と、シャフトベアリングホールを有する円筒形状
の溝とを有するケースを含む。シャフトは前記溝のシャ
フトベアリングホールに挿入されて回転することができ
る。多数のシリンダー部材はそれぞれシリンダーホール
を備えた状態で前記ケースの溝に配置され前記シャフト
の回転力を受けて回転することができる。ピストン部材
は各シリンダー部材に位置しシリンダー部材の回転に伴
ってシリンダーホールの内部で往復運動する。傾斜面を
有する斜板部材はケースと結合されて前記溝の開口部を
覆う。各シリンダー部材は前記溝の開口部方向に底面を
有する。腰部を有するシューはコネクティング部材を通
じてピストン部材に固定され斜板部材の傾斜面と接触す
る。
前記シリンダー部材の底面にはバレル(barrel)形状
部が設けられ、前記シューの腰部には段部が設けられて
いる。弾性シューホルダーは前記シューの段部に挿入さ
れる。前記弾性シューホルダーは丸い中心ホールを有
し、多数の弾性本体が互いに結合して一体となり前記中
心ホールの周囲で内側に曲がっている。弾性シューホル
ダーの挿入は丸い中心ホールを通じて実現できる。弾性
シューホルダーが前記シューの段部に挿入される時、弾
性本体はバレル形状部に接触する。前記弾性本体の屈曲
部は良好な弾性効果を発揮するようにそれぞれ曲がった
形状に形成される。An object of the present invention is to provide a hydraulic pump capable of efficiently performing the shoe-holding function with only one member. Such an object can be achieved by a hydraulic pump having an elastic shoe holder. The hydraulic pump includes a case having a plurality of fluid passages and a cylindrical groove having a shaft bearing hole. The shaft may be inserted into the shaft bearing hole of the groove to rotate. The plurality of cylinder members, each having a cylinder hole, are arranged in the groove of the case and can be rotated by receiving the rotational force of the shaft. The piston member is located in each cylinder member and reciprocates inside the cylinder hole as the cylinder member rotates. A swash plate member having an inclined surface is coupled to the case to cover the opening of the groove. Each cylinder member has a bottom surface toward the opening of the groove. The shoe having a waist is fixed to the piston member through the connecting member and contacts the inclined surface of the swash plate member. A barrel-shaped portion is provided on the bottom surface of the cylinder member, and a step portion is provided on the waist portion of the shoe. The elastic shoe holder is inserted into the step portion of the shoe. The elastic shoe holder has a round center hole, and a plurality of elastic bodies are integrally connected to each other and bent inward around the center hole. Insertion of the elastic shoe holder can be realized through a round center hole. When the elastic shoe holder is inserted into the step portion of the shoe, the elastic body contacts the barrel-shaped portion. The bent portions of the elastic body are formed in a bent shape so as to exert a good elastic effect.
以下、本発明の好ましい実施例を添付図面に基づいて
説明する。
図1は本発明の第1実施例による弾性シューホルダー
を有する液圧ポンプを示した断面図であり、図2Aない
し図2Cは弾性シューホルダーを示した図面である。
図1に示されているように、液圧ポンプは多数の流体
通路8、10とシャフトベアリングホール4を有する円
筒形状の溝6とを有するケース12と、前記溝6のシャ
フトベアリングホール4に挿入されて回転できるシャフ
ト12とを含む。多数のシリンダー部材14はそれぞれ
シリンダーホール16を有しケース2の溝6に配置さ
れ、シャフト2の回転力を受けると回転できる。さら
に、各シリンダー部材14はシリンダーホール16とそ
れぞれの流体通路8、10との間を流体が通過できるよ
うに通過ホール18を有する。バレル形状部は本体のシ
リンダー部材14の底面から突出している。前記バレル
形状部は以下では簡単にバレル20と示されシュー24
と対向する丸い面を有する。前記バレル20は従来の液
圧ポンプに採用されたバレル部材と同一の機能を遂行す
るものである。ピストン部材32は各シリンダー部材1
4に位置しシリンダー部材14のシリンダーホール16
の内部で往復運動する。
斜板部材26はケース12と結合されて前記溝6の開
口部を覆う。前記斜板部材26は傾斜面28を形成する
上側部を有する。
前記ピストン部材32は前記シリンダーホール16内
で往復運動するピストン22と、コネクティング部材3
0を介してピストン22に固定されるシュー24とを含
み、シリンダー部材14の回転に伴って斜板部材26の
傾斜面28に沿って移動できる。前記コネクティング部
材30は前記傾斜面28に沿ってシュー24が円滑に移
動できるようにするボールジョイントで形成される。
前記シュー24は腰部に、以下では簡単にストッパー
34と言及される段部を有する。一定の弾性を有する弾
性シューホルダー36はシュー24のストッパー34に
挿入されて固定される。
図2Aないし図2Cに示されているように、弾性シュ
ーホルダー36は丸い中心ホール38と、互いに結合し
て前記中心ホール38の周囲で内側に曲がった多数の弾
性本体40とを有する。すなわち、それぞれの弾性本体
40は屈曲部44から中心ホール38に向かう平行な2
重面である。さらに、それぞれの弾性本体40は2重面
部にホール42を有する。前記ホール42に隣接した弾
性本体40の自由端形成部側はバレル20と接触して固
定された状態になる反面、前記弾性本体40の反対側は
前記シュー24のストッパー34に固定される。
前記シュー24とバレル20との間で作用する弾性シ
ューホルダー36の弾性力によって、前記シュー24が
斜板部材26の傾斜面28に堅く接触し前記シリンダー
部材14の回転に伴って安定して傾斜面28に沿って移
動する。
前記弾性本体40の屈曲部44は効果的な弾性力を発
生させるように曲がった形状に形成される。
作動に際して、前記シャフト2がシリンダー部材14
に回転力を伝達する時、コネクティング部材30を介し
てピストン22に固定されたシュー24が斜板部材26
の傾斜面28に沿って移動することにより前記ピストン
22が回転するシリンダー部材14のシリンダーホール
16内で往復運動する。前記シュー24が傾斜面28に
沿って下側に移動する場合、流体は流体流入通路8を通
じて通過ホール18を経由してシリンダーホール16に
流入する。その反面、前記シュー24が傾斜面28に沿
って上側に移動する場合、前記シリンダーホール16に
流入した流体は通過ホール18を経由して流体排出通路
10を通じて排出される。
図3Aないし図3Cは本発明の第2実施例による液圧
ポンプの弾性シューホルダーを図示した図面である。こ
の実施例において、弾性シューホルダー以外の液圧ポン
プの全体構成要素は前記第1実施例と同一である。
図3Aと図3Bに示されているように、弾性シューホ
ルダー49は丸い中心ホール45と、前記中心ホール4
5の周りに中心をおいている球面部46と、前記球面部
46から延長される多数のプレート48とを有する。前
記球面部46は前記シリンダー部材14のバレル20と
接触するように予め定められた曲率を有する。このよう
な構造で、球面部46の上下部直径は当然異なり、所望
の弾性が弾性シューホルダー49で得られる。
以上のように、本発明の液圧ポンプは適切な方法で単
一部材である弾性シューホルダーのみでシューをホルデ
ィングする機能を遂行することができる。これによっ
て、製造時間が短縮され、経済的な製造費用及び高い生
産効率が得られるようになる。Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a sectional view showing a hydraulic pump having an elastic shoe holder according to a first embodiment of the present invention, and FIGS. 2A to 2C are drawings showing the elastic shoe holder. As shown in FIG. 1, a hydraulic pump has a case 12 having a plurality of fluid passages 8 and 10 and a cylindrical groove 6 having a shaft bearing hole 4, and is inserted into the shaft bearing hole 4 of the groove 6. And a shaft 12 that can be rotated. The plurality of cylinder members 14 each have a cylinder hole 16 and are arranged in the groove 6 of the case 2, and can rotate when receiving the rotational force of the shaft 2. Further, each cylinder member 14 has a passage hole 18 for allowing fluid to pass between the cylinder hole 16 and the respective fluid passages 8, 10. The barrel-shaped portion projects from the bottom surface of the cylinder member 14 of the main body. The barrel-shaped portion will be referred to below simply as barrel 20 and shoe 24
Has a rounded surface facing the. The barrel 20 performs the same function as the barrel member used in the conventional hydraulic pump. The piston member 32 is each cylinder member 1
Cylinder hole 16 of cylinder member 14 located at 4
Reciprocate inside. The swash plate member 26 is coupled to the case 12 to cover the opening of the groove 6. The swash plate member 26 has an upper portion forming an inclined surface 28. The piston member 32 reciprocates in the cylinder hole 16 and the connecting member 3
The shoe 24 is fixed to the piston 22 through the axis 0, and can move along the inclined surface 28 of the swash plate member 26 as the cylinder member 14 rotates. The connecting member 30 is formed of a ball joint that allows the shoe 24 to move smoothly along the inclined surface 28. Said shoe 24 has a step on the waist, which is referred to below simply as stopper 34. The elastic shoe holder 36 having a certain elasticity is inserted and fixed in the stopper 34 of the shoe 24. As shown in FIGS. 2A to 2C, the elastic shoe holder 36 has a round center hole 38 and a plurality of elastic bodies 40 that are connected to each other and bend inwardly around the center hole 38. That is, each elastic body 40 is parallel to the center hole 38 from the bent portion 44.
It is a serious aspect. Further, each elastic body 40 has a hole 42 in the double-faced portion. The free end forming portion side of the elastic body 40 adjacent to the hole 42 is in contact with and fixed to the barrel 20, while the opposite side of the elastic body 40 is fixed to the stopper 34 of the shoe 24. Due to the elastic force of the elastic shoe holder 36 acting between the shoe 24 and the barrel 20, the shoe 24 firmly contacts the inclined surface 28 of the swash plate member 26 and is stably inclined as the cylinder member 14 rotates. Move along surface 28. The bent portion 44 of the elastic body 40 is formed in a bent shape so as to generate an effective elastic force. In operation, the shaft 2 causes the cylinder member 14 to
When transmitting the rotational force to the swash plate member 26, the shoe 24 fixed to the piston 22 through the connecting member 30
By moving along the inclined surface 28, the piston 22 reciprocates in the cylinder hole 16 of the rotating cylinder member 14. When the shoe 24 moves downward along the inclined surface 28, the fluid flows into the cylinder hole 16 through the fluid inflow passage 8 and the passage hole 18. On the other hand, when the shoe 24 moves upward along the inclined surface 28, the fluid flowing into the cylinder hole 16 is discharged through the fluid discharge passage 10 via the passage hole 18. 3A through 3C are views showing an elastic shoe holder of a hydraulic pump according to a second embodiment of the present invention. In this embodiment, the entire components of the hydraulic pump other than the elastic shoe holder are the same as those in the first embodiment. As shown in FIGS. 3A and 3B, the elastic shoe holder 49 includes a round center hole 45 and
5 has a spherical portion 46 centered around 5 and a number of plates 48 extending from said spherical portion 46. The spherical portion 46 has a predetermined curvature so as to come into contact with the barrel 20 of the cylinder member 14. With such a structure, the upper and lower diameters of the spherical portion 46 are naturally different, and the desired elasticity can be obtained by the elastic shoe holder 49. As described above, the hydraulic pump of the present invention can perform the function of holding the shoe only by the elastic shoe holder which is a single member, by a proper method. As a result, manufacturing time is shortened, and economical manufacturing cost and high production efficiency can be obtained.
本発明は前記具体的な実施例を参照して詳細に説明さ
れているが、この分野における通常の知識を有する者に
とってみれば、添付された請求範囲に述べられている本
発明の技術思想を外れない範囲で多様な変化及び代替が
可能である。
[図面の簡単な説明]Although the present invention has been described in detail with reference to the above specific embodiments, those skilled in the art can understand the technical idea of the present invention described in the appended claims. Various changes and substitutions are possible without departing from the scope. [Brief description of drawings]
【図1】 本発明の第1実施例による弾性シューホルダ
ーを有する液圧ポンプの断面図。FIG. 1 is a sectional view of a hydraulic pump having an elastic shoe holder according to a first embodiment of the present invention.
【図2】(A) 図1に示した弾性シューホルダーの斜
視図。
(B) 図1に示した弾性シューホルダーの正面図。
(C) 図1に示した弾性シューホルダーの平面図。FIG. 2A is a perspective view of the elastic shoe holder shown in FIG. (B) A front view of the elastic shoe holder shown in FIG. 1. (C) A plan view of the elastic shoe holder shown in FIG. 1.
【図3】(A)本発明の第2実施例による液圧ポンプの
弾性シューホルダーの斜視図。
(B) 図3(A)に示した弾性シューホルダーの平面
図。
(C) 図3(A)に示した弾性シューホルダーの正面
図。FIG. 3A is a perspective view of an elastic shoe holder of a hydraulic pump according to a second embodiment of the present invention. 3B is a plan view of the elastic shoe holder shown in FIG. (C) A front view of the elastic shoe holder shown in FIG.
【図4】 従来の技術による液圧ポンプの断面図。FIG. 4 is a cross-sectional view of a conventional hydraulic pump.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 パーク ジョン―ケオル 大韓民国 689−800 ウルサン―シティ ウルジュ―ク エオニャン―エウプ バンケオン―リ 1023−51 ヒャンダ イ・アパート 105−303号 (56)参考文献 実開 昭63−156477(JP,U) 実開 昭59−182677(JP,U) 実公 平7−41899(JP,Y2) (58)調査した分野(Int.Cl.7,DB名) F04B 1/22 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Park John-Keol Republic of Korea 689-800 Ulsan-City Urjuk-Eoyang-Eup Bangkeon-ri 1023-51 Hyangdai Apartment 105-303 (56) References Showa 63-156477 (JP, U) Showa 59-182677 (JP, U) Showa 7-41899 (JP, Y2) (58) Fields investigated (Int.Cl. 7 , DB name) F04B 1 / twenty two
Claims (2)
ホールを有する円筒形状の溝を有するケースと、回転可
能に前記溝のシャフトベアリングホールに挿入されるシ
ャフトと、それぞれシリンダーホールを有し前記ケース
の溝に配置されて前記シャフトの回転力を受けると回転
することができる多数のシリンダー部材と、前記シリン
ダー部材のシリンダーホール内で往復移動するように前
記それぞれのシリンダー部材に位置するピストン部材
と、前記溝の開口部を覆うように前記ケースと結合され
傾斜面を有する斜板部材と、腰部を有し前記斜板部材の
傾斜面と接触しコネクティング部材を通じて前記ピスト
ン部材に固定されるシューとを含み、前記シリンダー部
材はそれぞれ前記溝の開口部方向に位置する底面を有す
る液圧ポンプにおいて、 前記シリンダー部材の底面から突出するバレル形状部
と、 前記シューの腰部に形成される段部と、 前記シューの段部に挿入され、前記バレル形状部と接触
する一側部を有する弾性シューホルダーとを備え、 前記弾性シューホルダーは、円形の中心ホールと、互い
に結合されて前記中心ホールの周囲で内側に曲っている
多数の弾性本体とを有し、前記円形の中心ホールを通じ
て前記シューの段部に挿入され前記弾性シューホルダー
の一側部が前記弾性本体に対応しているバレル形状部と
接触する液圧ポンプ。1. A case having a cylindrical groove having a plurality of fluid passages and a shaft bearing hole, a shaft rotatably inserted into the shaft bearing hole of the groove, and a groove of the case having cylinder holes respectively. A plurality of cylinder members arranged to rotate when receiving the rotational force of the shaft, a piston member positioned in each of the cylinder members so as to reciprocate in a cylinder hole of the cylinder member, and the groove. A swash plate member that is coupled to the case so as to cover the opening of the swash plate member, and a shoe that has a waist portion and that is in contact with the swash plate member swash plate member and is fixed to the piston member through a connecting member, In the hydraulic pump, each of the cylinder members has a bottom surface located in the direction of the opening of the groove. An elastic shoe holder having a barrel-shaped portion protruding from a bottom surface of the cylinder member, a step portion formed on a waist portion of the shoe, and one side portion inserted into the step portion of the shoe and contacting the barrel-shaped portion. The elastic shoe holder has a circular center hole and a plurality of elastic bodies coupled to each other and bent inwardly around the center hole, and the step of the shoe is formed through the circular center hole. A hydraulic pump in which one side of the elastic shoe holder is inserted into a barrel-shaped portion and comes into contact with a barrel-shaped portion corresponding to the elastic main body.
を有する請求項1に記載の液圧ポンプ。2. The hydraulic pump according to claim 1, wherein each bent portion of the elastic body has a curved shape.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019990000759U KR19990021863U (en) | 1999-01-21 | 1999-01-21 | Elastic shoe holder of oilhydraulic pump |
KR1999/759U | 1999-01-21 | ||
PCT/KR1999/000286 WO2000043672A1 (en) | 1999-01-21 | 1999-06-10 | Hydraulic pump |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002286341A Division JP2003155973A (en) | 1999-01-21 | 2002-09-30 | Hydraulic pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2002535552A JP2002535552A (en) | 2002-10-22 |
JP3375332B2 true JP3375332B2 (en) | 2003-02-10 |
Family
ID=19571222
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000595057A Expired - Fee Related JP3375332B2 (en) | 1999-01-21 | 1999-06-10 | Hydraulic pump |
JP2002286341A Pending JP2003155973A (en) | 1999-01-21 | 2002-09-30 | Hydraulic pump |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002286341A Pending JP2003155973A (en) | 1999-01-21 | 2002-09-30 | Hydraulic pump |
Country Status (5)
Country | Link |
---|---|
JP (2) | JP3375332B2 (en) |
KR (2) | KR19990021863U (en) |
CN (1) | CN1136388C (en) |
AU (1) | AU4170999A (en) |
WO (1) | WO2000043672A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4526640B2 (en) * | 2000-03-10 | 2010-08-18 | ヤンマー株式会社 | Axial piston pump / motor |
JP2001304099A (en) * | 2000-04-25 | 2001-10-31 | Yanmar Diesel Engine Co Ltd | Axial piston pump motor |
KR100433392B1 (en) * | 2002-02-18 | 2004-05-31 | 한국기계연구원 | Swash plate type axial piston apparatus |
KR100734552B1 (en) * | 2006-03-13 | 2007-07-02 | 전북대학교산학협력단 | Oil hydraulic piston pump and retainer for oil hydraulic piston pump |
US8511390B2 (en) | 2009-12-23 | 2013-08-20 | Bp Corporation North America Inc. | Rigless low volume pump system |
JP2014218919A (en) * | 2013-05-07 | 2014-11-20 | 川崎重工業株式会社 | Hydraulic rotation device |
DE102013210416A1 (en) * | 2013-06-05 | 2014-12-11 | Robert Bosch Gmbh | Hydrostatic axial piston machine and retaining plate |
CA2888027A1 (en) | 2014-04-16 | 2015-10-16 | Bp Corporation North America, Inc. | Reciprocating pumps for downhole deliquification systems and fluid distribution systems for actuating reciprocating pumps |
CN108799096B (en) * | 2018-06-13 | 2020-08-14 | 兰州理工大学 | Surface drag reduction type hydraulic plunger pump/motor cylinder |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3382814A (en) * | 1966-05-23 | 1968-05-14 | Sundstrand Corp | Piston holddown means |
CH482912A (en) * | 1967-11-15 | 1969-12-15 | Hueller Gmbh K | Axial piston machine |
US3996841A (en) * | 1971-02-23 | 1976-12-14 | Sundstrand Corporation | Hydraulic pump or motor |
DE3911129A1 (en) * | 1989-04-06 | 1990-10-11 | Kirovogr Z Gidravliceskich Sil | Hydraulic axial piston machine |
US5862704A (en) * | 1996-11-27 | 1999-01-26 | Caterpillar Inc. | Retainer mechanism for an axial piston machine |
-
1999
- 1999-01-21 KR KR2019990000759U patent/KR19990021863U/en active IP Right Review Request
- 1999-06-10 CN CNB99801205XA patent/CN1136388C/en not_active Expired - Fee Related
- 1999-06-10 JP JP2000595057A patent/JP3375332B2/en not_active Expired - Fee Related
- 1999-06-10 AU AU41709/99A patent/AU4170999A/en not_active Abandoned
- 1999-06-10 WO PCT/KR1999/000286 patent/WO2000043672A1/en active Application Filing
- 1999-08-13 KR KR2019990016680U patent/KR200169204Y1/en not_active IP Right Cessation
-
2002
- 2002-09-30 JP JP2002286341A patent/JP2003155973A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2000043672A1 (en) | 2000-07-27 |
CN1136388C (en) | 2004-01-28 |
JP2003155973A (en) | 2003-05-30 |
KR200169204Y1 (en) | 2000-02-15 |
CN1286742A (en) | 2001-03-07 |
JP2002535552A (en) | 2002-10-22 |
KR19990021863U (en) | 1999-06-25 |
AU4170999A (en) | 2000-08-07 |
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