JPH0530473U - Swash plate type axial piston device - Google Patents

Swash plate type axial piston device

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Publication number
JPH0530473U
JPH0530473U JP8740891U JP8740891U JPH0530473U JP H0530473 U JPH0530473 U JP H0530473U JP 8740891 U JP8740891 U JP 8740891U JP 8740891 U JP8740891 U JP 8740891U JP H0530473 U JPH0530473 U JP H0530473U
Authority
JP
Japan
Prior art keywords
swash plate
pressure receiving
slipper shoe
slipper
shoe
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.)
Pending
Application number
JP8740891U
Other languages
Japanese (ja)
Inventor
真通 坂本
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.)
Suzuki Motor Co Ltd
Original Assignee
Suzuki Motor Co Ltd
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 Suzuki Motor Co Ltd filed Critical Suzuki Motor Co Ltd
Priority to JP8740891U priority Critical patent/JPH0530473U/en
Publication of JPH0530473U publication Critical patent/JPH0530473U/en
Pending legal-status Critical Current

Links

Abstract

(57)【要約】 【目的】 油圧バランスを得る受圧面の加工を可能に
し、斜板にかかる受圧面積を拡大すると共にスリッパシ
ューの斜板への接触面積を少なくする。 【構成】 斜板11とスリッパシュー10とを滑動させてこ
のスリッパシュー10に枢着させたピストン13を往復動さ
せ、スリッパシュー10から滑動面17に潤滑油を供給する
ようにした斜板式アキシャルピストン装置において、ス
リッパシュー10に潤滑油の油溜り部19を形成すると共に
凹状の受圧面20,21を形成して斜板11にかかる油圧の受
圧面積を大きくする。このようにしたので、受圧面20,
21の加工が容易になる。また受圧面積を大きくしたの
で、斜板11とスリッパシュー10の接触面積が低減され
る。これによって必要かつ充分な微小潤滑隙間の確保が
可能となり、シール性および潤滑性の確保が可能となっ
て、スリッパシューと斜板とが摩耗することがなくなり
耐用寿命が長くなる。
(57) [Summary] [Purpose] It is possible to process the pressure receiving surface to obtain hydraulic balance, expand the pressure receiving area applied to the swash plate, and reduce the contact area of the slipper shoe to the swash plate. [Structure] A swash plate type axial type in which a swash plate 11 and a slipper shoe 10 are slid to reciprocate a piston 13 pivotally mounted on the slipper shoe 10 to supply lubricating oil from the slipper shoe 10 to a sliding surface 17. In the piston device, an oil reservoir 19 for lubricating oil is formed on the slipper shoe 10 and concave pressure receiving surfaces 20, 21 are formed to increase the pressure receiving area of the hydraulic pressure applied to the swash plate 11. Since this is done, the pressure receiving surface 20,
21 processing becomes easy. Further, since the pressure receiving area is increased, the contact area between the swash plate 11 and the slipper shoe 10 is reduced. As a result, it becomes possible to secure a necessary and sufficient minute lubrication gap, the sealing property and the lubricity can be secured, the slipper shoe and the swash plate are not worn, and the service life is extended.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、斜板式アキシャルピストンのスリッパシューの潤滑隙間を任意に設 定できるように改良した斜板式アキシャルピストン装置に関するものである。 The present invention relates to a swash plate type axial piston device improved so that a lubricating gap of a slipper shoe of a swash plate type axial piston can be arbitrarily set.

【0002】[0002]

【従来の技術】[Prior Art]

まず、図3に代表的な斜板式アキシャルピストン装置を示し、その概略につい て説明する。1はハウジング内で旋回するシリンダを備えた斜板式アキシャルピ ストン装置で、2はそのハウジングである。ハウジング2の下部(図において下 側)には吸入口3が設けられ,上部に吐出口4が設けられている。ハウジング2 の内部には軸受5,6が設けられており、駆動軸7を回転自在に支持している。 First, FIG. 3 shows a typical swash plate type axial piston device, and its outline will be described. Reference numeral 1 is a swash plate type axial piston device having a cylinder that swivels in the housing, and 2 is the housing. A suction port 3 is provided in the lower part (lower side in the figure) of the housing 2, and a discharge port 4 is provided in the upper part. Bearings 5 and 6 are provided inside the housing 2 to rotatably support the drive shaft 7.

【0003】 駆動軸7は、図示しない右側の基端において駆動装置に結合されており、図の 左側に位置する先端にはボール軸受8を介して回転する連結斜板9が揺動可能に 支持されている。この連結斜板9の一部にはスリッパシュー10が設けられており 、このスリッパシュー10はハウジング2に固定された断面形状が三角形の斜板11 に滑動自在に接している。The drive shaft 7 is connected to a drive device at a right-hand base end (not shown), and a connecting swash plate 9 which rotates via a ball bearing 8 is swingably supported at a front end located on the left-hand side in the drawing. Has been done. A slipper shoe 10 is provided on a part of the connecting swash plate 9. The slipper shoe 10 slidably contacts a swash plate 11 having a triangular cross section fixed to the housing 2.

【0004】 連結斜板9の駆動軸7側には、駆動軸7に平行に2個のシリンダ12が設けられ ており、その内部にはピストン13が摺動自在に嵌挿されている。ピストン13の先 端は球状部14に形成されており、球状部14は前記スリッパシュー10に枢着してい る。この構造により駆動軸7が回転すると駆動軸7と共に駆動軸7の周囲をシリ ンダ12が旋回する。Two cylinders 12 are provided in parallel with the drive shaft 7 on the drive shaft 7 side of the connecting swash plate 9, and a piston 13 is slidably fitted therein. The front end of the piston 13 is formed into a spherical portion 14, and the spherical portion 14 is pivotally attached to the slipper shoe 10. With this structure, when the drive shaft 7 rotates, the cylinder 12 revolves around the drive shaft 7 together with the drive shaft 7.

【0005】 シリンダ12が旋回すると、シリンダ12に嵌挿してるピストン13の先端のスリッ パシュー10が斜板11の傾斜面上を滑動しながら案内される。すると、連結斜板9 が揺動してピストン12がシリンダ11内を往復動する。ピストン13が往復動するこ とによって吸入口3から吸い込まれた油は吐出口4から吐出されることになる。When the cylinder 12 turns, the slipper shoe 10 at the tip of the piston 13 fitted into the cylinder 12 is guided while sliding on the inclined surface of the swash plate 11. Then, the connecting swash plate 9 swings and the piston 12 reciprocates in the cylinder 11. By the reciprocating movement of the piston 13, the oil sucked from the suction port 3 is discharged from the discharge port 4.

【0006】 図4は、スリッパシュー10と斜板11とが滑動する部分を拡大して示したもので ある。このスリッパシュー14においてはスリッパシュー10の、斜板11と滑動する 部分すなわちシールランド部15は平坦面に形成されている。また、シールランド 部15の中央には垂直にあけた油溜り部16が設けられている。そして、駆動軸7の 作動時には、シールランド部15と斜板11とが接する滑動面17に油圧によって微小 の隙間(以下、潤滑隙間という)が形成され、この潤滑隙間にピストン13の油孔 18から油溜り部16に送られて貯溜された潤滑油が供給されて油膜が形成され、滑 動面17の潤滑性を図りながらシール性を確保している。これにおいてはスリッパ シュー10は一種の静圧軸受となっている。FIG. 4 is an enlarged view of a portion where the slipper shoe 10 and the swash plate 11 slide. In this slipper shoe 14, a portion of the slipper shoe 10 that slides with the swash plate 11, that is, a seal land portion 15 is formed into a flat surface. Further, an oil sump portion 16 which is vertically opened is provided at the center of the seal land portion 15. When the drive shaft 7 operates, a small gap (hereinafter referred to as a lubrication gap) is formed by hydraulic pressure on the sliding surface 17 where the seal land portion 15 and the swash plate 11 are in contact, and the oil hole 18 of the piston 13 is formed in this lubrication gap. The lubricating oil stored in the oil reservoir 16 is supplied from the oil reservoir 16 to form an oil film, so that the sliding surface 17 is lubricated and the sealing property is ensured. In this, the slipper shoe 10 is a kind of hydrostatic bearing.

【0007】 シールランド部15と斜板11との滑動面17に形成される上記潤滑隙間は、油溜り 部16から斜板11にかかる受圧面積(静圧部の面積)に比例して決まるので、この 受圧面積をあまり大きくとると潤滑隙間が大きくなり過ぎて潤滑性はあってもシ ール性がが損なわれ、斜板式アキシャルピストンの効率が低下する。したがって 、ピストン13の断面積をA,油圧をP0 ,油溜り部16の半径をr1 とすれば、P 0 A>P0 πr1 2 の関係となり、一般的には斜板11に滑動するスリッパシュー 10の受圧面積はピストン13の受圧面積より小さくなっている。これにより潤滑隙 間に油膜を形成しながらシール性を持たせていることになる。The lubricating gap formed on the sliding surface 17 between the seal land portion 15 and the swash plate 11 is determined in proportion to the pressure receiving area (area of the static pressure portion) applied from the oil sump portion 16 to the swash plate 11. However, if the pressure receiving area is made too large, the lubrication gap becomes too large and the sealability is impaired even though there is lubricity, and the efficiency of the swash plate axial piston decreases. Therefore, the cross-sectional area of the piston 13 is A and the hydraulic pressure is P0 , The radius of the oil sump 16 is r1 If so, P 0 A> P0 πr1 2 Therefore, the pressure receiving area of the slipper shoe 10 sliding on the swash plate 11 is generally smaller than the pressure receiving area of the piston 13. As a result, an oil film is formed between the lubrication gaps and the sealing property is provided.

【0008】 なお、ピストン形流体装置のスリッパおよび斜板キャビテーション侵食制御緩 衝装置として、特開昭57-165601 号公報に開示されているものがある。この公報 に開示されているものは、テーパ状の受圧面をもつスリッパが摺接する斜板に油 の放出口を設けて、エネルギーの分散をさせたものである。また、斜板構造形式 の調節可能なアキシャルピストン機械として、特開平1-113501号公報に開示され ているものがある。この公報に開示されているものは、旋回体である回転斜板の 支持側と、ケーシング内の構成部材の支持面とが、調節装置を操作したばあい支 持面に対して相対的な旋回体の転動運動を生じせしめる輪郭を有したものとであ る。As a slipper and a swash plate cavitation erosion control cushioning device for a piston type fluid device, there is one disclosed in Japanese Patent Application Laid-Open No. 57-165601. What is disclosed in this publication is to disperse energy by providing an oil discharge port on a swash plate with which a slipper having a tapered pressure receiving surface is in sliding contact. Further, as an adjustable axial piston machine of a swash plate structure type, there is one disclosed in Japanese Patent Laid-Open No. 1-113501. What is disclosed in this publication is that the supporting side of the rotating swash plate, which is a revolving body, and the supporting surface of the constituent members in the casing rotate relative to the supporting surface when the adjusting device is operated. It has a contour that causes rolling motion of the body.

【0009】[0009]

【考案が解決しようとする課題】[Problems to be solved by the device]

以上説明した従来技術にあっては、斜板11とシールランド部15との滑動面17に 形成される潤滑隙間は油溜り部16から斜板にかかる受圧面積に比例して決まるの で、この受圧面積を大きくすると潤滑隙間が大きくなって潤滑性を満足させても シール性が損なわれ、逆に、受圧面積を小さくすると潤滑隙間が小さくなってシ ール性を満足させても潤滑性が損なわれる。このためこの潤滑性とシール性の2 つの油圧力バランスを満足させる受圧面をスリッパシュー10に加工することが困 難であった。 In the conventional technology described above, the lubricating gap formed on the sliding surface 17 between the swash plate 11 and the seal land portion 15 is determined in proportion to the pressure receiving area applied from the oil sump portion 16 to the swash plate. If the pressure receiving area is made large, the lubricating gap becomes large and the sealing performance is impaired even if the lubricating property is satisfied. Conversely, if the pressure receiving area is made small, the lubricating gap becomes small and the lubricating property becomes poor even if the sealing property is satisfied. Be damaged. For this reason, it was difficult to form the pressure receiving surface of the slipper shoe 10 that satisfies the two hydraulic pressure balances of lubricity and sealability.

【0010】 実際、従来例のスリッパシューに加工された油溜り部16は垂直な凹部で形成さ れ、シールランド部15も平坦面となっていたので、この油溜り部16の受圧面積は シール性を満足させても潤滑性を満足させていなかった。したがって、駆動軸7 の極低速時および起動時においては潤滑隙間に供給される潤滑油が不足し、油膜 が充分に形成されず、スリッパシュー10と斜板11とが摩耗して耐用寿命が短くな る問題があった。Actually, the oil sump portion 16 processed in the slipper shoe of the conventional example is formed by a vertical concave portion, and the seal land portion 15 also has a flat surface. Therefore, the pressure receiving area of the oil sump portion 16 is the seal area. Even if the property was satisfied, the lubricity was not satisfied. Therefore, when the drive shaft 7 is extremely low speed and at the time of start-up, the lubricating oil supplied to the lubricating gap is insufficient, the oil film is not sufficiently formed, and the slipper shoe 10 and the swash plate 11 are worn and the useful life is shortened. There was a problem.

【0011】 なお、特公昭57−165601号公報に開示されている、ピストン形流体装置のスリ ッパおよび斜板キャビテーション侵食制御緩衝装置は斜板に滑動するスリッパに テーパ状の受圧面を形成しているが一方向から流れる油による受圧面ではないの で本考案の課題を解決しているものではない。また、特開平1-113501号公報に開 示された斜板構造形式の調節可能なアキシャルピストン機械はスリッパシューに 受圧面が形成されていないので、本考案の課題を解決していない。The slipper of a piston type fluid device and the swash plate cavitation erosion control shock absorber disclosed in Japanese Patent Publication No. Sho 57-165601 have a tapered pressure receiving surface formed on the slipper sliding on the swash plate. However, it does not solve the problem of the present invention because it is not a pressure receiving surface due to oil flowing from one direction. Further, the adjustable axial piston machine of the swash plate structure type disclosed in Japanese Patent Laid-Open No. 1-113501 does not solve the problem of the present invention because the slipper shoe has no pressure receiving surface.

【0012】 本考案は油圧バランスを得る受圧面の加工を可能にし、斜板にかかる受圧面積 を拡大すると共にスリッパシューの斜板への接触面積を少なくし、極低速時およ び起動時においても、スリッパシュー等の摩耗をなくした斜板式アキシャルピス トン装置を提供することを目的とする。The present invention makes it possible to machine the pressure receiving surface to obtain a hydraulic balance, expand the pressure receiving area applied to the swash plate, and reduce the contact area of the slipper shoe to the swash plate, so that it can be used at extremely low speeds and at startup Another object is to provide a swash plate type axial piston device which eliminates wear of slipper shoes and the like.

【0013】[0013]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は上記課題を解決するための手段として、斜板とスリッパシューとを滑 動させて該スリッパシューに枢着させたピストンを往復動させ、前記スリッパシ ューから前記滑動面に潤滑油を供給するようにした斜板式アキシャルピストン装 置において、前記スリッパシューに潤滑油の油溜り部を形成すると共に凹状の受 圧面を形成して前記斜板にかかる油圧の受圧面積を大きくしたことを特徴とする As a means for solving the above problems, the present invention slides a swash plate and a slipper shoe to reciprocate a piston pivotally attached to the slipper shoe, and supplies lubricating oil from the slipper shoe to the sliding surface. In the swash plate type axial piston device configured as described above, the slipper shoe is formed with an oil reservoir for lubricating oil and a concave pressure receiving surface is formed to increase a hydraulic pressure receiving area applied to the swash plate. Do

【0014】[0014]

【作用】[Action]

本考案は以上説明したようにスリッパシューに油溜り部を設け、かつ、凹状の 受圧面を形成したので、この凹状の受圧面の形状を変えることによってシール性 および潤滑性の2つの油圧力バランスを満足させ得る受圧面を加工することが可 能となる。このように形成した受圧面によって受圧面積が拡大し、必要かつ充分 な微小潤滑隙間の確保が可能となり、シール性および潤滑性の確保が確実になる と共に受圧面が凹状なので、これによっても斜板とスリッパシューの接触面積の 低減を図ることが可能となる。 As described above, according to the present invention, the slipper shoe is provided with the oil reservoir and the concave pressure receiving surface is formed. Therefore, by changing the shape of the concave pressure receiving surface, the two oil pressure balances of the sealing property and the lubricating property can be obtained. It is possible to process the pressure receiving surface that satisfies the above condition. The pressure receiving surface formed in this way expands the pressure receiving area, and it is possible to secure the necessary and sufficient microlubrication gap. This ensures the sealing and lubricity, and the pressure receiving surface is concave. It is possible to reduce the contact area between the slipper shoe and the slipper shoe.

【0015】[0015]

【実施例】【Example】

以下、本考案の一実施例を図1について、図3および図4と同一の部材には同 一の符号を付して説明する。この考案のものでは、ピストン14先端の球状部14が 枢着しているスリッパシュー10の斜板11側には潤滑油の油溜り部19が形成されて おり、この油溜り部19から凹状、すなわち漏斗状の受圧面20が形成されている。 このようにスリッパシュー10に漏斗状の受圧面20を形成すると斜板11にかかる油 圧の受圧面積が従来に比べて大きくなる。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1, in which the same members as those in FIGS. 3 and 4 are designated by the same reference numerals. In the device of this invention, an oil reservoir 19 for lubricating oil is formed on the side of the swash plate 11 of the slipper shoe 10 to which the spherical portion 14 at the tip of the piston 14 is pivoted. That is, the funnel-shaped pressure receiving surface 20 is formed. When the funnel-shaped pressure receiving surface 20 is formed on the slipper shoe 10 in this way, the pressure receiving area of the hydraulic pressure applied to the swash plate 11 becomes larger than in the conventional case.

【0016】 これを式によって示すと次のようになる。すなわち、ピストン13の断面積をA ,油圧をP0 ,油溜り部19の半径をr1 ,テーパ状の受圧面20の半径をr2 ,ピ ストン13の半径をrとすると、P0 A=P0 πr1 2+∫r1 r22πP0 rdrとい う関係となる。すなわち、ピストン13の断面積Aの油圧P0 は油溜り部19の断面 積πr1 2の油圧P0 と、受圧面20のみの半径rの円周と油圧P0 との積を、受圧 面20のr1 からr2 の間で積分したものとの和に等しい。また、斜板11とシール ランド部15との滑動面17と、漏斗状の受圧面20の大径部分との間隔をh1 ,小径 部分との間隔をh2 とすれば、テーパ量(テーパ角度)はh2 −h1 となる。This can be expressed by the following equation. That is, if the cross-sectional area of the piston 13 is A, the hydraulic pressure is P 0 , the radius of the oil reservoir 19 is r 1 , the radius of the tapered pressure receiving surface 20 is r 2 , and the radius of the piston 13 is r, then P 0 A = P 0 πr 1 2 + ∫ r1 r2 2πP 0 rdr. That is, the hydraulic pressure P 0 of the area A of the piston 13 and the cross sectional area pi] r 1 2 hydraulic P 0 in the oil reservoir 19, the product of the circumference and pressure P 0 of the radius r of the only pressure-receiving surface 20, the pressure receiving surface Equivalent to the sum of 20 integrated between r 1 and r 2 . If the distance between the sliding surface 17 between the swash plate 11 and the seal land 15 and the large diameter portion of the funnel-shaped pressure receiving surface 20 is h 1 , and the distance between the small diameter portion is h 2 , the taper amount (taper The angle is h 2 −h 1 .

【0017】 次に本実施例の作用を説明する。上記のようにスリッパシュー10に油溜り部19 を設け、さらにこの油溜り部19から凹状すなわち漏斗状の受圧面20を形成したの で、この凹状の受圧面20の形状を変えることによってシール性および潤滑性の2 つの油圧力バランスを満足させ得る受圧面20の加工が容易になる。したがって、 必要かつ充分な微小潤滑隙間の確保が可能となって、シール性および潤滑性を確 実に確保することが可能となる。Next, the operation of this embodiment will be described. Since the slipper shoe 10 is provided with the oil sump portion 19 and the concave or funnel-shaped pressure receiving surface 20 is formed from the oil sump portion 19 as described above, the sealing property is changed by changing the shape of the concave pressure receiving surface 20. Further, it becomes easy to process the pressure receiving surface 20 that can satisfy the two hydraulic pressure balances of lubricity. Therefore, it becomes possible to secure a necessary and sufficient minute lubrication gap, and it is possible to ensure the sealing property and the lubricity.

【0018】 さらにこの受圧面20によって、斜板11にかかる油圧の受圧面積を拡大すること ができ、かつ、受圧面20を漏斗状にしたので、シールライト部15の斜板11との接 触面積の低減が図れる。これらによって滑動面17の潤滑隙間を確実に確保するこ とができる。すなわち、斜板11とシールランド部15の滑動面17に潤滑のための潤 滑隙間h2 が形成される。これによって駆動軸7の極低速時および起動時におい ても潤滑隙間に充分に潤滑油が供給されると共に接触面積が低減したので、スリ ッパシュー10と斜板11とが摩耗することがなくなって、耐用寿命を高めることが 可能となる。Further, the pressure receiving surface 20 allows the pressure receiving area of the hydraulic pressure applied to the swash plate 11 to be enlarged, and the pressure receiving surface 20 has a funnel shape, so that the contact of the seal light portion 15 with the swash plate 11 is increased. The area can be reduced. By these, the lubrication gap of the sliding surface 17 can be surely secured. That is, a lubrication gap h 2 for lubrication is formed between the swash plate 11 and the sliding surface 17 of the seal land portion 15. As a result, the lubricating oil is sufficiently supplied to the lubricating gap and the contact area is reduced even when the drive shaft 7 is extremely low speed and at the time of starting, so that the slipper shoe 10 and the swash plate 11 are not worn, It is possible to extend the service life.

【0019】 なお、本実施例は斜板11に滑動するスリッパシュー10に潤滑油の油溜り部16と 凹状である漏斗状の受圧面20とを設けたものであるが、これにかぎらず、図2に 示すように凹状、すなわち溝状の受圧面21をストッパシュー10のシールランド部 15に複数個形成してもよい。このようにしても斜板9にかかる油圧の受圧面積を 大きくすることができ、かつ、シールライト部15の斜板11との接触面積の低減を 図ることができる。このことによって滑動面17の潤滑隙間を漏斗ものと同様に確 実に確保することができ、駆動軸7の極低速時および起動時においてもスリッパ シュー10と斜板11とが摩耗することがなくなる。In this embodiment, the slipper shoe 10 sliding on the swash plate 11 is provided with the oil reservoir 16 of the lubricating oil and the concave funnel-shaped pressure receiving surface 20, but the invention is not limited to this. As shown in FIG. 2, a plurality of concave or groove-shaped pressure receiving surfaces 21 may be formed on the seal land portion 15 of the stopper shoe 10. Even in this case, the pressure receiving area of the hydraulic pressure applied to the swash plate 9 can be increased, and the contact area of the seal light portion 15 with the swash plate 11 can be reduced. As a result, the lubrication gap of the sliding surface 17 can be assuredly secured like the funnel, and the slipper shoe 10 and the swash plate 11 will not be worn even when the drive shaft 7 is extremely low speed and started.

【0020】[0020]

【考案の効果】[Effect of the device]

本考案は以上説明したようにスリッパシューに油溜り部を設け、かつ、凹状の 受圧面を形成したので、この凹状の受圧面の形状を変えることによってシール性 および潤滑性の2つの油圧力バランスを満足させ得る受圧面を容易に加工するこ とができる。このように形成した受圧面によって、斜板にかかる油圧の受圧面積 を拡大することができ、必要かつ充分な微小潤滑隙間が確保でき、シール性およ び潤滑性の確保が確実になると共に受圧面が凹状なので、斜板とスリッパシュー の接触面積の低減を図ることができる。これによって駆動軸の極低速時および起 動時には潤滑隙間に充分に潤滑油が供給され、かつ、接触面積が低減しているの で、スリッパシューと斜板とが摩耗することがなくなり耐用寿命を高めることが できる。 As described above, according to the present invention, the slipper shoe is provided with the oil reservoir and the concave pressure receiving surface is formed. Therefore, by changing the shape of the concave pressure receiving surface, the two oil pressure balances of the sealing property and the lubricating property can be obtained. It is possible to easily process the pressure receiving surface that satisfies the above condition. The pressure receiving surface formed in this way allows the pressure receiving area of the hydraulic pressure applied to the swash plate to be expanded, and a necessary and sufficient minute lubrication gap can be secured, ensuring the sealability and lubricity as well as receiving the pressure. Since the surface is concave, the contact area between the swash plate and the slipper shoe can be reduced. As a result, the lubricating oil is sufficiently supplied to the lubricating gap and the contact area is reduced when the drive shaft is running at extremely low speeds and when it is started, so the slipper shoe and the swash plate do not wear and the service life is extended. Can be increased.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案の一実施例の要部の断面図である。FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

【図2】本考案の他の実施例の要部の断面図である。FIG. 2 is a sectional view of an essential part of another embodiment of the present invention.

【図3】従来使用している斜板式アキシャルピストンポ
ンプの概略断面図である。
FIG. 3 is a schematic sectional view of a conventionally used swash plate type axial piston pump.

【図4】図3のスリッパシューと斜板との滑動状態を示
す断面図である。
4 is a cross-sectional view showing a sliding state between the slipper shoe and the swash plate of FIG.

【符号の説明】[Explanation of symbols]

1 斜板式アキシャルピストン装置 10 スリッパシュー 11 斜板 13 ピストン 17 滑動面 19 油溜り部 20 受圧面 21 受圧面 1 Swash plate type axial piston device 10 Slipper shoe 11 Swash plate 13 Piston 17 Sliding surface 19 Oil sump 20 Pressure receiving surface 21 Pressure receiving surface

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 斜板とスリッパシューとを滑動させて該
スリッパシューに枢着させたピストンを往復動させ、前
記スリッパシューから前記滑動面に潤滑油を供給するよ
うにした斜板式アキシャルピストン装置において、前記
スリッパシューに潤滑油の油溜り部を形成すると共に凹
状の受圧面を形成して前記斜板にかかる油圧の受圧面積
を大きくしたことを特徴とする斜板式アキシャルピスト
ン装置。
1. A swash plate type axial piston device in which a swash plate and a slipper shoe are slid to reciprocate a piston pivotally attached to the slipper shoe, and lubricating oil is supplied from the slipper shoe to the sliding surface. 2. The swash plate type axial piston device according to claim 1, wherein an oil reservoir for lubricating oil is formed in the slipper shoe and a concave pressure receiving surface is formed to increase a hydraulic pressure receiving area applied to the swash plate.
JP8740891U 1991-09-30 1991-09-30 Swash plate type axial piston device Pending JPH0530473U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8740891U JPH0530473U (en) 1991-09-30 1991-09-30 Swash plate type axial piston device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8740891U JPH0530473U (en) 1991-09-30 1991-09-30 Swash plate type axial piston device

Publications (1)

Publication Number Publication Date
JPH0530473U true JPH0530473U (en) 1993-04-23

Family

ID=13914056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8740891U Pending JPH0530473U (en) 1991-09-30 1991-09-30 Swash plate type axial piston device

Country Status (1)

Country Link
JP (1) JPH0530473U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1082353A (en) * 1996-09-09 1998-03-31 Hitachi Ltd Fuel pump
JPH11218072A (en) * 1997-11-24 1999-08-10 Linde Ag Hydrostatic axial piston machine
JP2004239191A (en) * 2003-02-07 2004-08-26 Kayaba Ind Co Ltd Hydraulic piston pump motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1082353A (en) * 1996-09-09 1998-03-31 Hitachi Ltd Fuel pump
JPH11218072A (en) * 1997-11-24 1999-08-10 Linde Ag Hydrostatic axial piston machine
JP2004239191A (en) * 2003-02-07 2004-08-26 Kayaba Ind Co Ltd Hydraulic piston pump motor

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