JPH07167044A - Cylinder block engaging device for swash plate type piston pump motor - Google Patents

Cylinder block engaging device for swash plate type piston pump motor

Info

Publication number
JPH07167044A
JPH07167044A JP5318538A JP31853893A JPH07167044A JP H07167044 A JPH07167044 A JP H07167044A JP 5318538 A JP5318538 A JP 5318538A JP 31853893 A JP31853893 A JP 31853893A JP H07167044 A JPH07167044 A JP H07167044A
Authority
JP
Japan
Prior art keywords
cylinder block
rotary shaft
swash plate
spline
crowning
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
JP5318538A
Other languages
Japanese (ja)
Inventor
Mitsui Midorikawa
三亥 緑川
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.)
Uchida Oil Hydraulics Mfg Co Ltd
Original Assignee
Uchida Oil Hydraulics Mfg 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 Uchida Oil Hydraulics Mfg Co Ltd filed Critical Uchida Oil Hydraulics Mfg Co Ltd
Priority to JP5318538A priority Critical patent/JPH07167044A/en
Publication of JPH07167044A publication Critical patent/JPH07167044A/en
Pending legal-status Critical Current

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  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

PURPOSE:To prevent inclination of a cylinder block owing to bending of a rotary shaft and to improve lubricating ability by a method wherein crowning in the direction of a rotary shaft is formed on the spline of the rotary shaft engaged with the cylinder block of a swash plate type piston pump motor. CONSTITUTION:When a cylinder block 4 is rotated through a rotary shaft 2, pump operation by which fluid is delivered through a valve plate 9 is generated through reciprocating movement of a piston 5. When fluid is fed through a piping 12 to a cylinder block 4, on the other hand, motor operation by which the rotary shaft 2 is rotated through a swash plate 8 is generated through reciprocating movement of the piston 5. In a so formed hydraulic machine, crowning 16 is formed on the addendum of the spline 3 of the rotary shaft 2. The crowning 16 has a central point C on a surface B, passing through an intersection O and extending at right angles with an axial line 13, and is formed in an arc of a circle in the direction of the rotary shaft 2. This constitution hardly generates a moment which is generated when the axial line 3 is inclined owing bending of the rotary shaft 2 and causes inclination of the cylinder block 4.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、斜板形ピストンポンプ
又は斜板形ピストンモータのシリンダブロックと回転軸
との係着装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching a cylinder block of a swash plate type piston pump or a swash plate type piston motor to a rotary shaft.

【0002】[0002]

【従来の技術】従来、この種のポンプモータは、図1に
示すように、ケーシングaにスプラインbを形成した回
転軸cを挿通し、該スプラインbに一方の端面が弁板d
に当接したシリンダブロックeの中心部を挿通させて1
箇所で係着し、該シリンダブロックeの他方の端面の前
方に設けた斜板fに該シリンダブロックから出没自在の
複数本のピストンgの頭部をシューhを介して摺接させ
た構成を備えるを一般とする。該弁板dには、通常、2
個の繭形の透孔が形成されており、この透孔を介してピ
ストン室iの内部がケーシングaの外部に接続される。
該回転軸cの周囲にはガイドlにより支えられて該シリ
ンダブロックeをその端面が弁板dの板面に当接するよ
うに押圧するばねmが設けられる。該回転軸cが例えば
エンジンにより回転されることに伴ってシリンダブロッ
クeが回転されると、該ピストンgが斜板fの傾斜によ
り出没され、弁板dの一方の透孔を介してピストン室i
に吸入した流体を他方の透孔から吐出してポンプ作動を
行ない、該弁板dの一方の透孔を介して圧力流体がピス
トン室iに圧入されると、該ピストンgは斜板fの板面
に沿ってシリンダブロックeと共に回転し、回転軸cか
ら回転力が取出されてモータ作動を行なう。
2. Description of the Related Art Conventionally, in this type of pump motor, as shown in FIG. 1, a rotary shaft c having a spline b formed therein is inserted into a casing a, and one end face of the spline b has a valve plate d.
1 through the center of cylinder block e
A structure in which the heads of a plurality of pistons g that can freely retract from the cylinder block are slidably contacted to a swash plate f provided in front of the other end surface of the cylinder block e via a shoe h. Generally prepared. The valve plate d is usually 2
Individual cocoon-shaped through holes are formed, and the inside of the piston chamber i is connected to the outside of the casing a through the through holes.
A spring m, which is supported by a guide 1 and presses the cylinder block e so that its end surface contacts the plate surface of the valve plate d, is provided around the rotation axis c. When the cylinder block e is rotated as the rotation shaft c is rotated by, for example, an engine, the piston g is retracted by the inclination of the swash plate f, and the piston chamber is passed through one through hole of the valve plate d. i
When the fluid sucked in is discharged from the other through hole to perform the pump operation and the pressure fluid is pressed into the piston chamber i through the one through hole of the valve plate d, the piston g moves to the swash plate f. It rotates together with the cylinder block e along the plate surface, and the rotational force is taken out from the rotary shaft c to operate the motor.

【0003】該シューhは、斜板fの板面に垂直な方向
へピストン室i内の流体圧とシリンダブロックの反力に
より押され、この力の回転軸cの直角方向成分がピスト
ンgを介してシリンダブロックeをその回転軸と直角方
向へ押す。具体的には、図2に示すように、その回転軸
と直角方向へ押す力F1 は、(ピストンgの断面積)×
(ピストン室内の流体圧)×(ピストンgの本数)×
(tanα)÷2で表される。αは、斜板fの傾転角で
ある。該シリンダブロックeは回転軸cによって支持さ
れているので、前記回転軸と直角方向へ押す合力F1で
回転軸cはたわめられることになる。該シリンダブロッ
クeの端面と弁板dの板面は、その間から流体の多くの
漏れを発生しないように全面で当接して回転摺動させ高
効率と高圧運転を可能にする必要があり、回転軸cにた
わみが生じても該端面と板面の間には該端面の傾きによ
る隙間pを生じないようにシリンダブロックeを保持し
ておかなければならない。該回転軸cは前後の2箇所で
軸受j、jによりケーシングaに支持されており、その
中間の部分が前記合力F1 でたわみ、このたわみに倣っ
てシリンダブロックeを傾けるモーメントが発生する。
従って、高圧になり回転軸cのたわみが大きくなると、
シリンダブロックeと弁板dが離れやすくなる欠点があ
る。
The shoe h is pushed in the direction perpendicular to the plate surface of the swash plate f by the fluid pressure in the piston chamber i and the reaction force of the cylinder block, and the component of this force at right angles to the rotation axis c causes the piston g to move. Cylinder block e is pushed through in the direction perpendicular to the rotation axis. Specifically, as shown in FIG. 2, the force F1 pushing in the direction perpendicular to the rotation axis is (cross-sectional area of piston g) ×
(Fluid pressure in piston chamber) x (Number of pistons g) x
It is represented by (tan α) / 2. α is the tilt angle of the swash plate f. Since the cylinder block e is supported by the rotating shaft c, the rotating shaft c is bent by the resultant force F1 pushing in the direction perpendicular to the rotating shaft. It is necessary that the end surface of the cylinder block e and the plate surface of the valve plate d are brought into contact with each other over the entire surface so as not to generate much fluid leakage between them to rotate and slide to enable high efficiency and high pressure operation. Even if the shaft c is bent, the cylinder block e must be held between the end surface and the plate surface so that a gap p due to the inclination of the end surface does not occur. The rotating shaft c is supported on the casing a by bearings j, j at two front and rear positions, and an intermediate portion thereof is deflected by the resultant force F1 and a moment for tilting the cylinder block e is generated following the deflection.
Therefore, when the pressure becomes high and the deflection of the rotating shaft c becomes large,
There is a drawback that the cylinder block e and the valve plate d are easily separated.

【0004】一方、シリンダブロックeが弁板dから離
れないように押し付ける力F2 は、(ピストンgの断面
積)×(ピストン室内の流体圧)×(高圧側のピストン
の本数)×(1/2×K)+(ばねmの力)で表され、
Kは0.03以下のものが多い。
On the other hand, the force F2 pressing the cylinder block e so as not to separate from the valve plate d is (cross-sectional area of piston g) × (fluid pressure in piston chamber) × (number of high-pressure side pistons) × (1 / 2 × K) + (force of spring m),
Most of K is 0.03 or less.

【0005】回転軸cはたわみを少なくするために、で
きるだけ軸径を大きくする必要があり、場合によって
は、スプラインbの歯長を、係着に必要とする以上に長
く形成して回転軸cの剛性を高めることも行なわれてい
る。
In order to reduce the flexure of the rotary shaft c, it is necessary to make the shaft diameter as large as possible. In some cases, the spline b has a tooth length longer than that required for engaging the rotary shaft c. It is also done to increase the rigidity of the.

【0006】[0006]

【発明が解決しようとする課題】シリンダブロックeと
弁板dとの間からの漏れを少なくするために、前記F2
を大きくすると、シリンダブロックeと弁板dは離れに
くくなるが、シリンダブロックeと弁板dは焼付きやす
くなる不都合を生じる。従ってF2 は過度に大きくする
ことはできない。また、回転軸cとシリンダブロックe
とのスプライン係合長さを短くすれば、回転軸cのたわ
みに沿ってシリンダブロックeを傾けるモーメントは小
さくなるが、係合長さが短いためにスプラインの面圧が
高くなってスプラインが摩耗しやすくなる。更に、回転
軸cがたわんでいる状態であるのに、シリンダブロック
eが弁板dから離れないで回転している状態が生じた場
合、スプラインの端部上面にシリンダブロックが当接し
た片当り状態になってスプラインが摩耗する。
In order to reduce the leakage between the cylinder block e and the valve plate d, the above-mentioned F2
If the value is increased, the cylinder block e and the valve plate d are hard to separate from each other, but the cylinder block e and the valve plate d are easily seized. Therefore, F2 cannot be made too large. Also, the rotating shaft c and the cylinder block e
If the spline engagement length with is shortened, the moment that tilts the cylinder block e along the flexure of the rotating shaft c becomes smaller, but because the engagement length is short, the surface pressure of the spline increases and the spline wears. Easier to do. Further, when the cylinder block e is rotating without being separated from the valve plate d even though the rotation shaft c is in a bent state, the cylinder block abuts against the upper surface of the end of the spline. And the spline wears.

【0007】本発明は、シリンダブロックを弁板に押付
ける力を強くせず、しかも回転軸とシリンダブロックの
スプライン係合長さを短くすることなく、シリンダブロ
ックと弁板の良好な接触状態と潤滑状態を維持し得る斜
板形ピストンポンプモータのシリンダブロック係着装置
を提供することを目的とするものである。
According to the present invention, a good contact state between the cylinder block and the valve plate is achieved without increasing the force for pressing the cylinder block against the valve plate and without shortening the spline engagement length between the rotary shaft and the cylinder block. An object of the present invention is to provide a cylinder block fastening device for a swash plate type piston pump motor that can maintain a lubricated state.

【0008】[0008]

【課題を解決するための手段】本発明では、スプライン
を形成した回転軸に、一方の端面が弁板に当接したシリ
ンダブロックを挿通させて係着し、該シリンダブロック
の他方の端面の前方に設けた斜板に該シリンダブロック
から出没自在の複数本のピストンの頭部をシューを介し
て摺接させた斜板形ピストンポンプモータに於いて、該
スプラインの該シリンダブロックと係着する部分に回転
軸方向のクラウニングを形成することにより、上記の目
的を達成するようにした。該クラウニングは、該ピスト
ンの各頭部の中心を通る面と回転軸の軸心線の交点を含
み、該軸心線に垂直な面上の点を中心として該軸心線の
方向の円弧に従う形状であることが好ましい。
According to the present invention, a cylinder block whose one end face is in contact with a valve plate is inserted into and engaged with a rotary shaft having a spline, and the other end face of the cylinder block is provided in front of the cylinder block. In a swash plate type piston pump motor in which the heads of a plurality of pistons that can freely move in and out of the cylinder block are slidably contacted to a swash plate provided in the cylinder block through a shoe, the portion of the spline that engages with the cylinder block The above object was achieved by forming crowning in the direction of the rotation axis. The crowning includes an intersection of a plane passing through the center of each head of the piston and the axis of the rotation axis, and follows an arc in the direction of the axis centered on a point on a plane perpendicular to the axis. It is preferably shaped.

【0009】[0009]

【作用】該回転軸が例えばエンジンにより回転されてポ
ンプ作動する場合、該回転軸にスプラインで係着された
シリンダブロックが回転され、その回転に伴いシリンダ
ブロックからピストンが斜板に沿って出没し、その出没
でシリンダ室へ外部から弁板を介して吸入した作動流体
を加圧して再び該弁板を介して外部へ吐出する。該ピス
トンがシリンダブロックへ没入する行程に於いて、流体
の加圧のために斜板の板面に垂直な力が発生し、この力
の回転軸と直角方向成分により回転軸がたわめられるこ
とになる。該回転軸に設けられるスプラインに上記クラ
ウニングを設けておくことにより、該回転軸が傾いても
シリンダブロックは傾かず、その端面は弁板から離れる
ことがなく、また、スプライン係合長さが必要なだけ取
れるから面圧も低くでき回転軸の傾斜によるシリンダブ
ロックとスプラインの片当りもなくなるのでスプライン
の摩耗を防げ、良好な接触状態と潤滑状態を維持でき
る。
When the rotary shaft is rotated by, for example, an engine and the pump is operated, the cylinder block splined to the rotary shaft is rotated, and with the rotation, the piston comes out from the cylinder block along the swash plate. The working fluid sucked into and out of the cylinder chamber from the outside through the valve plate is pressurized and discharged again through the valve plate. In the process of the piston immersing in the cylinder block, a force perpendicular to the plate surface of the swash plate is generated due to the pressurization of the fluid, and the rotary shaft is deflected by the component perpendicular to the rotary shaft of this force. It will be. By providing the crowning on the spline provided on the rotary shaft, the cylinder block does not tilt even if the rotary shaft tilts, its end face does not separate from the valve plate, and the spline engagement length is required. Since it can be taken as much as possible, the surface pressure can be lowered and the cylinder block and the spline are not evenly contacted with each other due to the inclination of the rotating shaft, so that the spline can be prevented from being worn and a good contact state and a lubricated state can be maintained.

【0010】[0010]

【実施例】本発明の実施例を別紙図面に基づき説明する
と、図3に於いて符号1は斜板形ピストンポンプモータ
のケーシング、2は該ケーシング1を挿通して軸受1
7、18により両端側が軸支された回転軸を示す。該回
転軸2の中間部にはスプライン3を形成してそこにシリ
ンダブロック4を挿通して係着する。該シリンダブロッ
ク4は、その円周方向に複数本のシリンダ室6を備えて
おり、各室6にピストン5が出没自在に設けられる。各
ピストン5の球状に形成した頭部5aは、これに嵌着し
たシュー7を介して斜板8の板面に当接される。該斜板
8はケーシング1に固定したものを示したが、これを適
当な手段により傾転させる構成とすることも可能であ
る。9はケーシング1の後蓋1aにピン10で固定した
弁板を示し、これの板面にシリンダブロック4の端面4
aが当接され、該シリンダブロック4が回転したときシ
リンダ室6と外部の配管11、12との間に流体を流通
させるための透孔が該弁板9に形成される。該透孔は通
常は2個の繭形のものが形成される。該回転軸2のスプ
ライン3には外周が球面となったガイド14を係着し、
これでシリンダブロック4を弁板9の板面に押付けるた
めのばね15が保持される。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the attached drawing. In FIG. 3, reference numeral 1 is a casing of a swash plate type piston pump motor, and 2 is a bearing 1 inserted through the casing 1.
7 shows a rotary shaft whose both ends are rotatably supported. A spline 3 is formed at an intermediate portion of the rotary shaft 2 and a cylinder block 4 is inserted into and fixed to the spline 3. The cylinder block 4 is provided with a plurality of cylinder chambers 6 in its circumferential direction, and a piston 5 is provided in each chamber 6 so as to be retractable. The spherical head portion 5a of each piston 5 is brought into contact with the plate surface of the swash plate 8 via the shoe 7 fitted to the spherical head portion 5a. Although the swash plate 8 is shown as being fixed to the casing 1, it may be tilted by an appropriate means. Reference numeral 9 denotes a valve plate fixed to the rear lid 1a of the casing 1 by a pin 10, and the plate surface of the valve plate 9 has an end surface 4 of the cylinder block 4.
The valve plate 9 is formed with a through hole for allowing a fluid to flow between the cylinder chamber 6 and the external pipes 11 and 12 when the cylinder block 4 is rotated by contacting a. The through holes are usually formed in two cocoon shapes. A guide 14 having a spherical outer periphery is attached to the spline 3 of the rotary shaft 2,
This holds the spring 15 for pressing the cylinder block 4 against the plate surface of the valve plate 9.

【0011】以上の構成は従来のものと略同様であり、
該回転軸2がエンジン等で駆動されてシリンダブロック
4に回転が与えられるときは、ピストン5が圧力流体を
弁板9を介して送り出すポンプ作動を行ない、一方の配
管12から弁板9を介して圧力流体がシリンダ室6に押
し込まれるときは、ピストン5がシリンダブロック4を
伴って斜板8に沿って回転し、回転軸2が回転するモー
タ作動を行なう。
The above construction is almost the same as the conventional one,
When the rotation shaft 2 is driven by an engine or the like to give rotation to the cylinder block 4, the piston 5 carries out a pump operation for sending out a pressure fluid through the valve plate 9, and the one pipe 12 through the valve plate 9 When the pressurized fluid is pushed into the cylinder chamber 6, the piston 5 rotates along with the cylinder block 4 along the swash plate 8, and the rotary shaft 2 rotates to operate the motor.

【0012】ポンプ作動或はモータ作動を行なうとき、
シリンダ室6内の流体圧力でピストン5が発生する推力
のために、シュー7には弁板9の板面に垂直な力が作用
し、この力の合力は各頭部5aの中心を通る面Aに対し
て垂直であり、この力の回転軸2の直角方向成分が上記
したようにピストン5を介してシリンダブロック4をそ
の回転軸と直角方向へ押し、回転軸2の軸心線13がた
わむことになる。このたわみが生じてもシリンダブロッ
ク4と弁板9との間からの漏れの増大とスプライン3の
摩耗を防ぐために、本発明では該スプライン3の歯先に
クラウニング16を設けるようにした。
When the pump or motor is operated,
Due to the thrust generated by the piston 5 due to the fluid pressure in the cylinder chamber 6, a force perpendicular to the plate surface of the valve plate 9 acts on the shoe 7, and the resultant force is a surface passing through the center of each head 5a. It is perpendicular to A, and the component of this force in the direction perpendicular to the rotary shaft 2 pushes the cylinder block 4 in the direction perpendicular to the rotary shaft via the piston 5 as described above, and the axis 13 of the rotary shaft 2 becomes I will bend. In order to prevent an increase in leakage between the cylinder block 4 and the valve plate 9 and wear of the spline 3 even if this bending occurs, the crowning 16 is provided at the tip of the spline 3 in the present invention.

【0013】該クラウニング16は、回転軸2を押す力
が、上記面Aと回転軸2の軸心線13との交点Oに向っ
て作用するので、該交点Oを通る軸心線13と直角な面
Bに中心点Cを持ち該回転軸2方向の円弧で形成するよ
うにした。このクラウニング16によって、回転軸2が
たわんでその軸心線13が傾いても、シリンダブロック
4を回転軸2に沿って傾けるモーメントが発生しにくく
なる。該クラウニング16の半径Rは、スプライン3の
呼び径の100倍程度で充分であり、これにより、スプ
ライン3の歯面に加わる面圧は、クラウニングなしで回
転軸2が片当り状態の場合よりも低くなる。
In the crowning 16, since the force pushing the rotating shaft 2 acts toward the intersection O between the surface A and the axis 13 of the rotating shaft 2, the crowning 16 is perpendicular to the axis 13 passing through the intersection O. It has a central point C on the plane B and is formed by an arc in the direction of the rotation axis 2. Due to the crowning 16, even if the rotary shaft 2 bends and the axis line 13 thereof tilts, a moment that tilts the cylinder block 4 along the rotary shaft 2 is less likely to occur. It is sufficient for the radius R of the crowning 16 to be about 100 times the nominal diameter of the spline 3, whereby the surface pressure applied to the tooth surface of the spline 3 is greater than that in the case where the rotary shaft 2 is in one-sided contact without crowning. Get lower.

【0014】該クラウニング16は、図3の場合、シリ
ンダブロック4の係着端部から上記面Bまでの長さが短
いから、スプライン3の弁板側の片側だけに形成した
が、図4に示すようにスプライン3の長さ方向の両端部
に形成してもよい。
In the case of FIG. 3, the crowning 16 is formed only on one side of the spline 3 on the valve plate side because the length from the engaging end portion of the cylinder block 4 to the surface B is short. As shown, it may be formed at both ends of the spline 3 in the length direction.

【0015】該回転軸2は、上記のようにポンプ或はモ
ータとして作動するとき、たわみを生じるが、クラウニ
ング16のために回転軸2のたわみによりシリンダブロ
ック4を傾けるモーメントが発生しにくく、シリンダブ
ロック4の端面は弁板9の板面に沿って移動し、シリン
ダブロック4の弁板9に対する押付け力を増大せずに、
また、スプライン3の長さを短くせずに、シリンダブロ
ック4と弁板9を当接させることができ、焼付きやスプ
ラインの摩耗を防止できる。
When the rotary shaft 2 is operated as a pump or a motor as described above, the rotary shaft 2 bends. However, due to the bending of the rotary shaft 2 due to the crowning 16, a moment for tilting the cylinder block 4 is unlikely to occur, and the cylinder is The end surface of the block 4 moves along the plate surface of the valve plate 9, and the pressing force of the cylinder block 4 against the valve plate 9 is not increased,
Further, the cylinder block 4 and the valve plate 9 can be brought into contact with each other without shortening the length of the spline 3, and seizure and wear of the spline can be prevented.

【0016】[0016]

【発明の効果】以上のように本発明によるときは、斜板
形ピストンポンプモータのシリンダブロックが係着され
る回転軸のスプラインにに回転軸方向のクラウニングを
形成したので、該回転軸のたわみによるシリンダブロッ
クの傾きを、シリンダブロックの弁板に対する押付け力
を増大せずに且つスプライン長さを削減せずに防止で
き、潤滑性がよいのでシリンダブロックと弁板の焼付き
がなく、スプラインが長いのでその摩耗がなく耐久性が
向上し、簡単な構成で性能の良いポンプモータが得られ
る等の効果がある。
As described above, according to the present invention, since the crowning in the direction of the rotating shaft is formed in the spline of the rotating shaft to which the cylinder block of the swash plate type piston pump motor is attached, the bending of the rotating shaft is caused. The cylinder block can be prevented from tilting by increasing the pressing force of the cylinder block against the valve plate and without reducing the spline length, and because the lubricity is good, there is no seizure between the cylinder block and the valve plate, and the spline is Since it is long, it is not worn and durability is improved, and it is possible to obtain a high-performance pump motor with a simple structure.

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

【図1】 従来例の截断側面図FIG. 1 is a cutaway side view of a conventional example.

【図2】 従来例の説明図FIG. 2 is an explanatory diagram of a conventional example.

【図3】 本発明の実施例の截断側面図FIG. 3 is a cutaway side view of an embodiment of the present invention.

【図4】 本発明の他の実施例の要部の截断側面図FIG. 4 is a cutaway side view of essential parts of another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 ケーシング 2 回転軸 3
スプライン 4 シリンダブロック 4a 端面 5
ピストン 7 シュー 8 斜板 9
弁板 13 軸心線 16 クラウニング
1 casing 2 rotating shaft 3
Spline 4 Cylinder block 4a End face 5
Piston 7 Shoe 8 Swash plate 9
Valve plate 13 Axis 16 Crowning

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 スプラインを形成した回転軸に、一方の
端面が弁板に当接したシリンダブロックを挿通させて係
着し、該シリンダブロックの他方の端面の前方に設けた
斜板に該シリンダブロックから出没自在の複数本のピス
トンの頭部をシューを介して摺接させた斜板形ピストン
ポンプモータに於いて、該スプラインの該シリンダブロ
ックと係着する部分に回転軸方向のクラウニングを形成
したことを特徴とする斜板形ピストンポンプモータのシ
リンダブロック係着装置。
1. A cylinder block whose one end face is in contact with a valve plate is inserted into and engaged with a rotary shaft having a spline, and the cylinder is attached to a swash plate provided in front of the other end face of the cylinder block. In a swash plate type piston pump motor in which the heads of a plurality of pistons that can freely move in and out of a block are slidably contacted via shoes, crowning in the direction of the rotation axis is formed at the portion of the spline that engages with the cylinder block. A cylinder block fastening device for a swash plate type piston pump motor.
【請求項2】 上記クラウニングは、上記ピストンの各
頭部の中心を通る面と回転軸の軸心線の交点を含み、該
軸心線に垂直な面上の点を中心として該軸心線の方向の
円弧に従う形状であることを特徴とする請求項1に記載
の斜板形ピストンポンプモータのシリンダブロック係着
装置。
2. The crowning includes an intersection of a plane passing through the center of each head of the piston and the axis of the rotation shaft, and the axis is centered on a point on a plane perpendicular to the axis. The cylinder block attaching device for a swash plate type piston pump motor according to claim 1, wherein the cylinder block attaching device has a shape that follows an arc of the direction.
JP5318538A 1993-12-17 1993-12-17 Cylinder block engaging device for swash plate type piston pump motor Pending JPH07167044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5318538A JPH07167044A (en) 1993-12-17 1993-12-17 Cylinder block engaging device for swash plate type piston pump motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5318538A JPH07167044A (en) 1993-12-17 1993-12-17 Cylinder block engaging device for swash plate type piston pump motor

Publications (1)

Publication Number Publication Date
JPH07167044A true JPH07167044A (en) 1995-07-04

Family

ID=18100247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5318538A Pending JPH07167044A (en) 1993-12-17 1993-12-17 Cylinder block engaging device for swash plate type piston pump motor

Country Status (1)

Country Link
JP (1) JPH07167044A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013088A (en) * 2010-07-02 2012-01-19 Linde Material Handling Gmbh Hydrostatic axial-piston machine
CN103069161A (en) * 2010-12-07 2013-04-24 川崎重工业株式会社 Skew plate-type hydraulic rotary machine
CN114320806A (en) * 2022-01-06 2022-04-12 佛山市液斯源液压制造有限公司 Hydraulic pump shell and machine core using same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013088A (en) * 2010-07-02 2012-01-19 Linde Material Handling Gmbh Hydrostatic axial-piston machine
US9080549B2 (en) 2010-07-02 2015-07-14 Linde Hydraulics Gmbh & Co. Kg Hydrostatic axial piston machine
CN103069161A (en) * 2010-12-07 2013-04-24 川崎重工业株式会社 Skew plate-type hydraulic rotary machine
CN114320806A (en) * 2022-01-06 2022-04-12 佛山市液斯源液压制造有限公司 Hydraulic pump shell and machine core using same

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