JP2000073940A - Variable displacement type swash plate type hydraulic rotary machine - Google Patents
Variable displacement type swash plate type hydraulic rotary machineInfo
- Publication number
- JP2000073940A JP2000073940A JP10257495A JP25749598A JP2000073940A JP 2000073940 A JP2000073940 A JP 2000073940A JP 10257495 A JP10257495 A JP 10257495A JP 25749598 A JP25749598 A JP 25749598A JP 2000073940 A JP2000073940 A JP 2000073940A
- Authority
- JP
- Japan
- Prior art keywords
- swash plate
- oil
- support member
- casing
- pair
- 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
Links
Landscapes
- Hydraulic Motors (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば油圧ショベ
ル等の建設機械において可変容量型の油圧ポンプまたは
油圧モータ等として好適に用いられる可変容量型斜板式
液圧回転機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable displacement type swash plate type hydraulic rotary machine suitably used as a variable displacement type hydraulic pump or hydraulic motor in a construction machine such as a hydraulic excavator.
【０００２】[0002]
【従来の技術】一般に、傾転アクチュエータで斜板を傾
転駆動することにより、油圧ポンプの場合には吐出容量
を可変とし、油圧モータの場合には回転速度やトルクを
可変に制御する構成とした可変容量型斜板式液圧回転機
は知られている。2. Description of the Related Art In general, a swash plate is tilted and driven by a tilt actuator so that a discharge capacity is variable in the case of a hydraulic pump and a rotational speed and a torque are variably controlled in a hydraulic motor. A variable displacement swash plate type hydraulic rotary machine described above is known.
【０００３】そこで、この種の従来技術による可変容量
型斜板式液圧回転機を、可変容量型斜板式油圧ポンプと
して用いた場合を例に挙げ、図１０及び図１１を参照し
て説明する。[0003] A variable displacement type swash plate type hydraulic rotary machine according to the prior art is used as a variable displacement type swash plate type hydraulic pump as an example with reference to Figs.
【０００４】図において、１は油圧ポンプのケーシング
で、該ケーシング１は、一端側が閉塞端２Ａとなり、他
端側が開口端２Ｂとなった段付筒状のケーシング本体２
と、該ケーシング本体２の開口端２Ｂ側を閉塞したフロ
ントケーシングとしての蓋体３とから構成されている。
また、ケーシング本体２の長さ方向中間部にはシリンダ
ブロック収容穴２Ｃの径方向外側に位置して、後述する
傾転制御ピストン１４，１５用のシリンダ穴２Ｄ，２Ｅ
が形成されている。In FIG. 1, reference numeral 1 denotes a casing of a hydraulic pump. The casing 1 has a stepped tubular casing body 2 having one end serving as a closed end 2A and the other end serving as an open end 2B.
And a lid 3 as a front casing that closes the opening end 2B side of the casing main body 2.
In the middle part of the casing body 2 in the longitudinal direction, the cylinder holes 2D and 2E for the tilt control pistons 14 and 15, which will be described later, are located radially outside the cylinder block housing holes 2C.
Are formed.
【０００５】４はケーシング１内に軸受等を介して回転
可能に設けられた回転軸で、該回転軸４は一端側がケー
シング本体２の閉塞端２Ａ側に回転可能に取付けられ、
他端側は蓋体３から外部に突出している。そして、回転
軸４の突出端４Ａ側にはディーゼルエンジン等の原動機
が動力伝達機構（いずれも図示せず）を介して連結さ
れ、これによって回転軸４は外部から回転駆動されるも
のである。Reference numeral 4 denotes a rotating shaft rotatably provided in the casing 1 via a bearing or the like. One end of the rotating shaft 4 is rotatably attached to the closed end 2A side of the casing body 2,
The other end protrudes from the lid 3 to the outside. A motor such as a diesel engine is connected to the protruding end 4A of the rotating shaft 4 via a power transmission mechanism (both not shown), whereby the rotating shaft 4 is driven to rotate from the outside.
【０００６】５はケーシング本体２のシリンダブロック
収容穴２Ｃ内に回転軸４を介して設けられたシリンダブ
ロックで、該シリンダブロック５はケーシング１内で回
転軸４の外周側にスプライン結合され、回転軸４と一体
に回転駆動される。そして、シリンダブロック５には軸
方向に延びる複数のシリンダ６（１本のみ図示）が回転
軸４の周囲に穿設され、該各シリンダ６の一端側は後述
の切換弁板７に摺接するものである。Reference numeral 5 denotes a cylinder block provided in the cylinder block receiving hole 2C of the casing main body 2 via the rotary shaft 4. The cylinder block 5 is spline-coupled to the outer peripheral side of the rotary shaft 4 in the casing 1 to rotate. It is driven to rotate integrally with the shaft 4. A plurality of cylinders 6 (only one is shown) extending in the axial direction are drilled around the rotation shaft 4 in the cylinder block 5, and one end of each cylinder 6 is in sliding contact with a switching valve plate 7 described later. It is.
【０００７】７はシリンダブロック５と摺接するように
ケーシング本体２の閉塞端２Ａ側に固着された切換弁板
で、該切換弁板７には眉形状をなす一対の給排ポート７
Ａ，７Ｂが形成され、該給排ポート７Ａ，７Ｂ間には切
換弁板７の中心側に位置して回転軸４用の軸挿通穴７Ｃ
が穿設されている。A switching valve plate 7 is fixed to the closed end 2A side of the casing body 2 so as to be in sliding contact with the cylinder block 5. The switching valve plate 7 has a pair of supply / discharge ports 7 in the form of eyebrows.
A and 7B are formed, and between the supply and discharge ports 7A and 7B, a shaft insertion hole 7C for the rotary shaft 4 is located at the center side of the switching valve plate 7.
Are drilled.
【０００８】８Ａ，８Ｂはケーシング本体２の閉塞端２
Ａ側に形成された一対の給排通路を示し、該給排通路８
Ａ，８Ｂは切換弁板７の給排ポート７Ａ，７Ｂに連通
し、シリンダブロック５の回転に伴ってタンク（図示せ
ず）内の作動油を各シリンダ６内に吸入させると共に、
各シリンダ６内で加圧された圧油を外部に吐出させる構
成となっている。[0008] 8A, 8B is a closed end 2 of the casing body 2
A shows a pair of supply / discharge passages formed on the A side.
A and 8B communicate with supply / discharge ports 7A and 7B of the switching valve plate 7, and in accordance with rotation of the cylinder block 5, hydraulic oil in a tank (not shown) is sucked into each cylinder 6, and
The pressure oil pressurized in each cylinder 6 is discharged to the outside.
【０００９】９はシリンダブロック５の各シリンダ６内
に摺動可能に挿嵌されたピストン（１本のみ図示）で、
該各ピストン９はシリンダブロック５の回転に伴って各
シリンダ６内を往復動し、切換弁板７側から各シリンダ
６内に作動油を吸込ませつつ、これを各シリンダ６内で
高圧の圧油に加圧するものである。また、各シリンダ６
から突出する各ピストン９の端部にはシュー１０がそれ
ぞれ揺動可能に設けられ、該各シュー１０は環状のシュ
ー押え１１等により後述の斜板１２側に向けて押圧され
ている。Reference numeral 9 denotes a piston (only one is shown) slidably inserted into each cylinder 6 of the cylinder block 5.
Each piston 9 reciprocates in each cylinder 6 with the rotation of the cylinder block 5, and sucks hydraulic oil into each cylinder 6 from the switching valve plate 7 side, and pressurizes the hydraulic oil in each cylinder 6. Pressurizes oil. In addition, each cylinder 6
A shoe 10 is swingably provided at an end of each piston 9 protruding from the piston 9, and each shoe 10 is pressed toward a swash plate 12 described later by an annular shoe retainer 11 or the like.
【００１０】ここで、各シリンダ６内を往復動する各ピ
ストン９は、図１０に示す如く回転軸４の上側となる位
置で下死点位置となり、下側に位置したときには上死点
位置となる。そして、シリンダブロック５が１回転する
間に、各ピストン９は各シリンダ６内を上死点から下死
点に向けて摺動変位する吸込行程と、下死点から上死点
に向けて摺動変位する吐出行程とを繰返すことになる。Here, each piston 9 reciprocating in each cylinder 6 is at a bottom dead center position at a position above the rotary shaft 4 as shown in FIG. Become. While the cylinder block 5 makes one rotation, each piston 9 slides in each cylinder 6 from top dead center to bottom dead center, and slides from bottom dead center to top dead center. That is, the discharge stroke that is dynamically displaced is repeated.
【００１１】即ち、シリンダブロック５の半回転分に相
当するピストン９の吸込行程では、給排通路８Ａ，８Ｂ
のうち、例えば吸込側となる給排通路８Ａ側から弁板７
の給排ポート７Ａを通じて各シリンダ６内に作動油を吸
入させる。また、シリンダブロック５の残りの半回転分
に相当するピストン９の吐出行程では、各ピストン９が
各シリンダ６内に押込まれるようになり、前記吸込行程
で各シリンダ６内に吸入した作動油を加圧する。そし
て、各シリンダ６内で加圧された作動油は高圧の圧油と
なって、例えば弁板７の給排ポート７Ｂ側から給排通路
８Ｂを通じて外部へと吐出されるものである。That is, in the suction stroke of the piston 9 corresponding to a half rotation of the cylinder block 5, the supply / discharge passages 8A, 8B
Of these, for example, the valve plate 7
Hydraulic oil is sucked into each cylinder 6 through the supply / discharge port 7A. Further, in the discharge stroke of the piston 9 corresponding to the remaining half rotation of the cylinder block 5, each piston 9 is pushed into each cylinder 6, and the hydraulic oil sucked into each cylinder 6 in the suction stroke Press. The hydraulic oil pressurized in each cylinder 6 becomes high-pressure oil, and is discharged from the supply / discharge port 7B side of the valve plate 7 to the outside through the supply / discharge passage 8B.
【００１２】１２はケーシング１の蓋体３側に傾転可能
に設けられた斜板で、該斜板１２は一側（表面側）が、
各シュー１０を摺動可能に案内する平滑面１２Ａとな
り、その中央部には回転軸４用の軸挿通穴１２Ｂが穿設
されている。そして、斜板１２には軸挿通穴１２Ｂの
左，右両側に一対の脚部１２Ｃ（一方のみ図示）が一体
形成され、該各脚部１２Ｃの表面側は平滑面１２Ａの一
部を構成している。また、各脚部１２Ｃの裏面側は後述
の傾転支持部材１３側に向けて突出する凸湾曲面１２Ｄ
となり、該各凸湾曲面１２Ｄは一定の曲率半径をもって
形成されている。Reference numeral 12 denotes a swash plate provided on the cover 3 side of the casing 1 so as to be tiltable, and the swash plate 12 has one side (front side).
A smooth surface 12A for slidably guiding each shoe 10 is provided, and a shaft insertion hole 12B for the rotating shaft 4 is formed in the center thereof. A pair of legs 12C (only one is shown) are integrally formed on the left and right sides of the shaft insertion hole 12B in the swash plate 12, and the front side of each leg 12C constitutes a part of the smooth surface 12A. ing. The rear surface of each leg 12C has a convex curved surface 12D protruding toward the tilt support member 13 described later.
The convex curved surfaces 12D are formed with a constant radius of curvature.
【００１３】１３は斜板１２の裏面側に位置してケーシ
ング１の蓋体３に設けられた傾転支持部材で、該傾転支
持部材１３は耐摩耗性が高い材料により形成され、その
中心側には回転軸４が挿通される軸挿通穴１３Ａを有し
ている。また、傾転支持部材１３には、図１１に示すよ
うに軸挿通穴１３Ａの左，右両側に一対の凹湾曲面部１
３Ｂ，１３Ｂが設けられ、該各凹湾曲面部１３Ｂは斜板
１２の凸湾曲面１２Ｄに対応して一定の曲率半径をもっ
た円弧面として形成されている。Reference numeral 13 denotes a tilt support member provided on the cover 3 of the casing 1 located on the back side of the swash plate 12, and the tilt support member 13 is formed of a material having high wear resistance. The side has a shaft insertion hole 13A through which the rotating shaft 4 is inserted. As shown in FIG. 11, the tilt support member 13 has a pair of concave curved surface portions 1 on the left and right sides of the shaft insertion hole 13A.
3B and 13B are provided, and each concave curved surface portion 13B is formed as an arc surface having a constant radius of curvature corresponding to the convex curved surface 12D of the swash plate 12.
【００１４】ここで、傾転支持部材１３の各凹湾曲面部
１３Ｂ内には斜板１２の各脚部１２Ｃが凸湾曲面１２Ｄ
を介して摺動可能に嵌合され、これにより斜板１２は図
１０中の矢示Ａ，Ｂ方向に傾転される。そして、斜板１
２は矢示Ａ方向に傾転駆動されるときに傾転角が大きく
なり、これによって各シリンダ６に対する各ピストン９
のストローク量を長くし、ポンプ容量（圧油の吐出量）
を増大させる。また、斜板１２の傾転角を小さくするた
めに矢示Ｂ方向に傾転駆動したときには、各シリンダ６
に対する各ピストン９のストローク量が短くなることに
よって、ポンプ容量は減少される。Here, each leg 12C of the swash plate 12 has a convex curved surface 12D in each concave curved surface 13B of the tilt support member 13.
The swash plate 12 is tilted in directions indicated by arrows A and B in FIG. And swash plate 1
2 has a large tilt angle when tilted in the direction indicated by the arrow A.
Pump stroke (pressure oil discharge)
Increase. When the swash plate 12 is tilted and driven in the direction of arrow B in order to reduce the tilt angle, each cylinder 6
The pump displacement is reduced by reducing the stroke amount of each piston 9 with respect to.
【００１５】１４，１５は斜板１２を傾転駆動する傾転
アクチュエータとしての第１，第２の傾転制御ピストン
で、該傾転制御ピストン１４，１５はケーシング本体２
のシリンダ穴２Ｄ，２Ｅ内に摺動可能に挿嵌され、その
先端側が斜板１２に当接するようにスプリング１４Ａ，
１５Ａにより常時付勢されている。また、傾転制御ピス
トン１４，１５はシリンダ穴２Ｄ，２Ｅとの間に油室１
４Ｂ，１５Ｂを画成し、該油室１４Ｂ，１５Ｂ内に外部
から給排される傾転制御圧に応じてシリンダ穴２Ｄ，２
Ｅから斜板１２の表面側に向けて進退する構成となって
いる。Reference numerals 14 and 15 denote first and second tilt control pistons as tilt actuators for tilting the swash plate 12, respectively.
Slidably inserted into the cylinder holes 2D, 2E, and the springs 14A, 14A,
It is always energized by 15A. The tilt control pistons 14 and 15 are provided between the cylinder chambers 2D and 2E.
4B and 15B, and the cylinder holes 2D and 2B are formed in accordance with the tilt control pressure supplied and discharged from outside into the oil chambers 14B and 15B.
It is configured to advance and retreat from E toward the front side of the swash plate 12.
【００１６】ここで、傾転制御ピストン１４，１５はシ
リンダブロック５を径方向外側から挟むように斜板１２
の表面側に配設され、傾転支持部材１３とは回転軸４の
軸方向で斜板１２を挟んで反対側に位置している。そし
て、傾転制御ピストン１４，１５は、油室１４Ｂ，１５
Ｂ内に給排される傾転制御圧に応じて斜板１２を図１０
中の矢示Ａ，Ｂ方向に傾転駆動するものである。Here, the tilt control pistons 14 and 15 hold the swash plate 12 so as to sandwich the cylinder block 5 from the outside in the radial direction.
And is positioned on the opposite side of the tilt support member 13 with respect to the swash plate 12 in the axial direction of the rotation shaft 4. The tilt control pistons 14 and 15 are connected to the oil chambers 14B and 15
The swash plate 12 is moved in accordance with the tilt control pressure supplied / discharged in FIG.
It tilts and drives in the directions indicated by arrows A and B in the middle.
【００１７】１６はケーシング１に設けた圧油導入路
で、該圧油導入路１６は、図１１に示すようにケーシン
グ本体２に形成され、一端側が高圧側の給排通路８Ｂに
連通した第１の油路１６Ａと、該第１の油路１６Ａと連
通するように蓋体３に形成され、図１１に示す如く傾転
支持部材１３の各凹湾曲面部１３Ｂのうち一方の凹湾曲
面１３Ｂに沿って延びた第２の油路１６Ｂと、該第２の
油路１６Ｂに対して平行に離間し、他方の凹湾曲面部１
３Ｂに沿って延びた第３の油路１６Ｃと、該油路１６
Ｂ，１６Ｃを互いに連通させるための第４の油路１６Ｄ
とから大略構成されている。Reference numeral 16 denotes a pressure oil introduction passage provided in the casing 1. The pressure oil introduction passage 16 is formed in the casing main body 2 as shown in FIG. 11, and has one end communicating with a supply / discharge passage 8B on the high pressure side. The first oil passage 16A is formed in the lid 3 so as to communicate with the first oil passage 16A, and one of the concave curved surfaces 13B of the concave curved surface portions 13B of the tilt support member 13 as shown in FIG. The second oil passage 16B extending along the second oil passage 16B is spaced apart in parallel with the second oil passage 16B, and the other concave curved surface portion 1
A third oil passage 16C extending along the third oil passage 3B;
Fourth oil passage 16D for communicating B and 16C with each other
It is roughly composed of
【００１８】１７，１７は傾転支持部材１３に設けた一
対の油穴で、該各油穴１７は傾転支持部材１３の各凹湾
曲面部１３Ｂを軸方向に貫通して延び、その基端側は圧
油導入路１６の油路１６Ｂ，１６Ｃに連通している。そ
して、各油穴１７の先端側は各凹湾曲面部１３Ｂの表面
側に開口し、斜板１２の凸湾曲面１２Ｄと各凹湾曲面部
１３Ｂとの間に潤滑用の油液を供給するものである。Reference numerals 17 and 17 denote a pair of oil holes provided in the tilting support member 13. Each oil hole 17 extends through each concave curved surface portion 13B of the tilting support member 13 in the axial direction. The side communicates with the oil passages 16B and 16C of the pressure oil introduction passage 16. The leading end side of each oil hole 17 opens to the surface side of each concave curved surface portion 13B, and supplies the lubricating oil liquid between the convex curved surface 12D of the swash plate 12 and each concave curved surface portion 13B. is there.
【００１９】さらに、１８，１８，…は油路１６Ｂ，１
６Ｃ，１６Ｄの端部を閉塞するために蓋体３に設けられ
たプラグで、該各プラグ１８は、図１１に示す如く蓋体
３に油路１６Ｂ，１６Ｃ，１６Ｄをそれぞれ直線状に穴
加工した後に、それぞれの端部を封止するために用いら
れ、圧油導入路１６内の圧油が外部に漏洩するのを阻止
するものである。Further, 18, 18,... Are oil passages 16B, 1
Plugs 18 are provided on the lid 3 to close the ends of 6C and 16D. The plugs 18 are formed by drilling oil passages 16B, 16C and 16D in the lid 3 linearly as shown in FIG. After that, it is used to seal the respective ends, and prevents the pressure oil in the pressure oil introduction passage 16 from leaking to the outside.
【００２０】従来技術による可変容量型斜板式油圧ポン
プは、上述の如き構成を有するもので、次にその作動に
ついて説明する。The variable displacement type swash plate type hydraulic pump according to the prior art has the above-described configuration. Next, the operation thereof will be described.
【００２１】まず、原動機により回転軸４を回転駆動す
ると、シリンダブロック５が回転軸４と一体に回転する
ことより、各ピストン９がそれぞれのシリンダ６内を往
復動し、各ピストン９は吸込行程と吐出行程とを順次繰
返すことになる。そして、この間に各シュー１０は斜板
１２の平滑面１２Ａ上を、リング状軌跡を描くように滑
動し、各シリンダ６内でのピストン９の往復動を補償す
る。First, when the rotating shaft 4 is driven to rotate by the prime mover, the cylinder block 5 rotates integrally with the rotating shaft 4, so that each piston 9 reciprocates in each cylinder 6, and each piston 9 is in the suction stroke. And the discharge process are sequentially repeated. During this time, each shoe 10 slides on the smooth surface 12A of the swash plate 12 so as to draw a ring-like trajectory, thereby compensating the reciprocating motion of the piston 9 in each cylinder 6.
【００２２】また、可変容量型油圧ポンプとしてのポン
プ容量（圧油の吐出量）を変化させる場合には、傾転制
御ピストン１４，１５により斜板１２を図１０中の矢示
Ａ，Ｂ方向に傾転駆動し、斜板１２の傾転角を変化させ
る。そして、各シリンダ６内の各ピストン９は、斜板１
２の傾転角に応じてストローク量が増，減し、これによ
ってポンプ容量（圧油の吐出量）が可変に制御される。When the pump capacity (pressure oil discharge amount) of the variable displacement hydraulic pump is changed, the swash plate 12 is moved by the tilt control pistons 14 and 15 in directions indicated by arrows A and B in FIG. To tilt the swash plate 12 to change the tilt angle. Each piston 9 in each cylinder 6 is connected to the swash plate 1.
The stroke amount increases or decreases in accordance with the tilt angle of 2, whereby the pump displacement (pressure oil discharge amount) is variably controlled.
【００２３】この場合、斜板１２は各脚部１２Ｃが凸湾
曲面１２Ｄを介して傾転支持部材１３の各凹湾曲面部１
３Ｂに摺動可能に嵌合され、これにより斜板１２は矢示
Ａ，Ｂ方向への傾転動作が補償されている。しかし、斜
板１２にはシリンダブロック５の各ピストン９からシュ
ー１０を介して高い油圧力が作用するから、斜板１２の
各凸湾曲面１２Ｄと傾転支持部材１３の各凹湾曲面部１
３Ｂとの間は高面圧状態となる。In this case, the swash plate 12 is formed such that each leg 12C has a concave curved surface portion 1 of the tilt support member 13 via a convex curved surface 12D.
3B is slidably fitted to the swash plate 12, whereby the swash plate 12 is compensated for the tilting operation in the directions indicated by arrows A and B. However, since high hydraulic pressure acts on the swash plate 12 from each piston 9 of the cylinder block 5 via the shoe 10, each convex curved surface 12 </ b> D of the swash plate 12 and each concave curved surface portion 1 of the tilt support member 13 are formed.
3B is in a high surface pressure state.
【００２４】そこで、傾転支持部材１３の各凹湾曲面部
１３Ｂにはそれぞれ油穴１７を形成し、ケーシング１の
圧油導入路１６側から導かれる圧油を、斜板１２の各凸
湾曲面１２Ｄと傾転支持部材１３の各凹湾曲面部１３Ｂ
との間に各油穴１７を通じて供給することにより、両者
の摺動面を潤滑状態に保持する構成としている。Therefore, an oil hole 17 is formed in each concave curved surface portion 13B of the tilt support member 13, and pressure oil guided from the pressure oil introduction passage 16 side of the casing 1 is supplied to each convex curved surface of the swash plate 12. 12D and each concave curved surface portion 13B of the tilt support member 13
Is supplied through each oil hole 17 so that the sliding surfaces of both are kept in a lubricated state.
【００２５】[0025]
【発明が解決しようとする課題】ところで、上述した従
来技術では、傾転支持部材１３の各凹湾曲面部１３Ｂに
それぞれ油穴１７を形成し、該各油穴１７により斜板１
２の各凸湾曲面１２Ｄと傾転支持部材１３の各凹湾曲面
部１３Ｂとの間に潤滑用の油液を供給する構成としてい
るから、ケーシング１の蓋体３には長尺に延びる複数の
油路１６Ｂ，１６Ｃ，１６Ｄ等を穴加工する必要があ
り、この穴加工に手間がかかり、作業性が悪くなるとい
う問題がある。In the above-mentioned prior art, oil holes 17 are formed in each concave curved surface portion 13B of the tilt support member 13, and the swash plate 1 is formed by the oil holes 17.
2, the lubricating oil liquid is supplied between each convex curved surface 12D and each concave curved surface portion 13B of the tilting support member 13, so that the cover 3 of the casing 1 has a plurality of elongated elongated members. It is necessary to drill holes in the oil passages 16B, 16C, 16D and the like, and there is a problem that the drilling is troublesome and the workability is deteriorated.
【００２６】特に、これらの油路１６Ｂ，１６Ｃ，１６
Ｄは直線状に細長く延びる上に、互いに連通させる必要
があるため、細長いドリル等の工具を奥深い位置まで送
込むようにして穴加工を高精度に行うことが要求され、
作業性を高めるのが難しいという問題がある。In particular, these oil passages 16B, 16C, 16
Since D is elongated in a straight line and needs to communicate with each other, it is required to perform a hole machining with high precision by feeding a tool such as an elongated drill to a deep position,
There is a problem that it is difficult to enhance workability.
【００２７】また、ドリル等の工具を用いて蓋体３に油
路１６Ｂ，１６Ｃ，１６Ｄを穴加工した後には、図１１
に示す如く油路１６Ｂ，１６Ｃ，１６Ｄの端部をそれぞ
れプラグ１８で閉塞する必要がある。しかし、従来技術
の場合には、プラグ１８の使用本数が多く、これらのプ
ラグ１８による閉塞箇所は油漏れ等の発生原因になり易
いために、液圧回転機としての信頼性を高め、寿命を向
上させるのが難しいという問題がある。After drilling the oil passages 16B, 16C and 16D in the cover 3 using a tool such as a drill, FIG.
It is necessary to close the ends of the oil passages 16B, 16C, 16D with plugs 18 as shown in FIG. However, in the case of the prior art, the number of plugs 18 used is large, and the plugged portions due to these plugs 18 are likely to cause oil leakage or the like. There is a problem that it is difficult to improve.
【００２８】本発明は上述した従来技術の問題に鑑みな
されたもので、本発明は斜板と傾転支持部材との間の傾
転摺動面を良好に潤滑でき、斜板の傾転動作を安定させ
ることができると共に、潤滑用油液を供給するための穴
加工を簡略化でき、作業性、信頼性を向上できるように
した可変容量型斜板式液圧回転機を提供することを目的
としている。The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can provide good lubrication for the tilt sliding surface between the swash plate and the tilt support member, and can perform the tilt operation of the swash plate. The object of the present invention is to provide a variable displacement swash plate type hydraulic rotating machine which can stabilize the oil pressure and simplify the drilling for supplying the lubricating oil liquid, thereby improving workability and reliability. And
【００２９】[0029]
【課題を解決するための手段】上述した課題を解決する
ために本発明は、ケーシングと、該ケーシング内に回転
可能に設けられた回転軸と、軸方向に複数のシリンダが
穿設され、前記ケーシング内で該回転軸と一体的に回転
するシリンダブロックと、該シリンダブロックの各シリ
ンダに往復動可能に挿嵌された複数のピストンと、該各
ピストンの突出側の端部に装着されたシューと、表面側
が該各シューを摺動可能に案内する平滑面となり、裏面
側に凸湾曲状をなす一対の脚部が設けられた斜板と、該
斜板の裏面側に位置して前記ケーシングに当接して取付
けられ、該斜板を傾転可能に支持するため前記各脚部に
対応する一対の凹湾曲面部を有した傾転支持部材と、前
記斜板を傾転駆動する傾転アクチュエータとからなる可
変容量型斜板式液圧回転機に適用される。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a casing, a rotating shaft rotatably provided in the casing, and a plurality of cylinders formed in an axial direction. A cylinder block that rotates integrally with the rotation shaft in the casing, a plurality of pistons reciprocally inserted into each cylinder of the cylinder block, and a shoe mounted on a protruding end of each piston And a swash plate having a pair of legs formed on the back surface side as a smooth surface for guiding each shoe slidably and having a convex curved shape on the back surface side, and the casing positioned on the back surface side of the swash plate. And a tilting support member having a pair of concave curved surfaces corresponding to the legs for tiltably supporting the swash plate, and a tilting actuator for tiltingly driving the swash plate. Variable-capacity swash plate liquid It applied to the rotating machine.
【００３０】そして、請求項１の発明が採用する構成の
特徴は、前記傾転支持部材に、前記一対の凹湾曲面部と
斜板の各脚部との間の傾転摺動面に潤滑用の油液を供給
するため前記一対の凹湾曲面部をそれぞれ貫通して延び
る油孔を設け、前記ケーシングと傾転支持部材との当接
面側には、該一対の油孔を互いに連通させる油溝を設
け、かつ前記ケーシングには該油溝に向けて高圧油を導
く圧油導入路を設ける構成としたことにある。The first aspect of the present invention is characterized in that the tilt supporting member has a lubricating sliding surface between the pair of concave curved surfaces and the legs of the swash plate. An oil hole extending through each of the pair of concave curved surface portions to supply the oil liquid, and an oil hole for allowing the pair of oil holes to communicate with each other on a contact surface side between the casing and the tilting support member. A groove is provided, and the casing is provided with a pressure oil introduction passage for guiding high-pressure oil toward the oil groove.
【００３１】このように構成することにより、ケーシン
グの圧油導入路から導かれる高圧油を、ケーシングと傾
転支持部材との間の油溝に供給した後に、該油溝から傾
転支持部材の各油孔へと供給することができる。そし
て、該各油孔は傾転支持部材の一対の凹湾曲面部を貫通
し斜板の各脚部側に向けて延びることにより、該斜板の
各脚部と各凹湾曲面部との間に前記高圧油の一部を供給
でき、両者の間の傾転摺動面を潤滑状態に保持すること
ができる。With this configuration, after the high-pressure oil guided from the pressure oil introduction passage of the casing is supplied to the oil groove between the casing and the tilt support member, the high-pressure oil is supplied from the oil groove to the tilt support member. It can be supplied to each oil hole. Each oil hole extends through the pair of concave curved surface portions of the tilting support member and extends toward each leg side of the swash plate, whereby between each leg portion of the swash plate and each concave curved surface portion. A part of the high-pressure oil can be supplied, and the tilt sliding surface between the two can be maintained in a lubricated state.
【００３２】また、請求項２の発明では、傾転支持部材
に設けた一対の油孔のうち少なくともいずれか一つの油
孔を小径の絞り孔により構成している。これにより、斜
板支持部材の各凹湾曲面部と斜板の各脚部との間に油孔
を通じて供給される油量を調整でき、圧油導入路からの
高圧油が油孔側に向けて余分に流れるのを抑えることが
できる。According to the second aspect of the present invention, at least one of the pair of oil holes provided in the tilt support member is constituted by a small-diameter throttle hole. Thus, the amount of oil supplied through the oil hole between each concave curved surface portion of the swash plate support member and each leg of the swash plate can be adjusted, and the high-pressure oil from the pressure oil introduction path is directed toward the oil hole side. Extra flow can be suppressed.
【００３３】一方、請求項３の発明が採用する構成の特
徴は、斜板を、裏面側に一対の脚部が一体に設けられ、
傾転支持部材により傾転可能に支持される斜板本体と、
該斜板本体の表面側に当接して取付けられ、各シューを
案内するための平滑面を有した摺動板とから構成し、前
記斜板本体には、前記一対の脚部の凸湾曲面のうち少な
くともいずれか一方の凸湾曲面側に形成され、前記斜板
本体の傾転方向に延びた浅底の窪み部と、前記各脚部の
凸湾曲面と傾転支持部材の各凹湾曲面部との間にそれぞ
れ潤滑用の油液を供給するため前記各脚部をそれぞれ貫
通して延び、少なくとも一方が前記窪み部に連通した油
孔とを設け、前記斜板本体と摺動板との当接面側には、
前記一対の油孔を互いに連通させる油溝を設け、かつ前
記傾転支持部材には、前記一対の凹湾曲面部のうち少な
くとも一方の凹湾曲面部を貫通して延び前記窪み部に連
通する連通孔を設け、前記ケーシングには該連通孔に向
けて高圧油を導く圧油導入路を設ける構成としたことに
ある。On the other hand, a feature of the structure adopted by the invention of claim 3 is that the swash plate is provided integrally with a pair of legs on the back surface side,
A swash plate body that is tiltably supported by the tilt support member,
And a sliding plate having a smooth surface for guiding each shoe and abutting on the front surface side of the swash plate main body, wherein the swash plate main body has a convex curved surface of the pair of legs. A shallow-bottom recess formed on at least one of the convex curved surfaces and extending in the tilting direction of the swash plate main body, and the convex curved surfaces of the legs and the concave curves of the tilt support member. An oil hole extending through each of the legs in order to supply a lubricating oil liquid between the surface portion and at least one of the surface portions is provided, and at least one of the oil holes communicates with the recessed portion. On the contact surface side of
An oil groove is provided to allow the pair of oil holes to communicate with each other, and the tilt support member has a communication hole extending through at least one of the pair of concave curved surface portions and communicating with the concave portion. And the casing is provided with a pressure oil introduction path for guiding high-pressure oil toward the communication hole.
【００３４】このように構成することにより、斜板本体
の凸湾曲面側に設けた窪み部は斜板本体の傾転方向に延
びているから、斜板の傾転位置に拘らず傾転支持部材の
連通孔に対して常に連通状態を保つことができる。そし
て、ケーシングの圧油導入路から傾転支持部材の連通孔
へと導かれる高圧油を、前記窪み部を介して少なくとも
一つの油孔内に供給することにより、斜板本体と摺動板
との間の油溝内へと油液を供給でき、該油溝を経由して
斜板本体の全て油孔内へと油液を供給することができ
る。また、該各油孔は斜板本体の一対の脚部をそれぞれ
貫通し傾転支持部材の各凹湾曲面部側に向けて延びるこ
とにより、斜板本体の各脚部と各凹湾曲面部との間に前
記油液を供給でき、両者の間の傾転摺動面を潤滑状態に
保持することができる。With this configuration, the depression provided on the convex curved surface side of the swash plate main body extends in the tilt direction of the swash plate main body. The communication state can always be maintained with the communication hole of the member. Then, by supplying high-pressure oil guided from the pressure oil introduction passage of the casing to the communication hole of the tilt support member into at least one oil hole through the recess, the swash plate main body and the sliding plate The oil liquid can be supplied into the oil groove between the two, and the oil liquid can be supplied into all the oil holes of the swash plate main body via the oil groove. Further, the oil holes extend through the pair of legs of the swash plate main body and extend toward the concave curved surface portions of the tilting support member, respectively, so that each leg of the swash plate main body and each concave curved surface portion are formed. The oil liquid can be supplied in between, and the tilt sliding surface between the two can be maintained in a lubricated state.
【００３５】また、請求項４の発明では、斜板本体に設
けた一対の油孔と傾転支持部材の連通孔のうち少なくと
もいずれか一つの孔部は、小径の絞り孔により構成して
いる。これにより、斜板の各脚部と傾転支持部材の各凹
湾曲面部との間に絞り孔を通じて供給される油量を調整
でき、圧油導入路からの高圧油が絞り孔側に向けて余分
に流れるのを抑えることができる。According to the fourth aspect of the present invention, at least one of the pair of oil holes provided in the swash plate main body and the communication hole of the tilting support member is constituted by a small-diameter throttle hole. . Thereby, the amount of oil supplied through the throttle hole between each leg of the swash plate and each concave curved surface of the tilt support member can be adjusted, and the high-pressure oil from the pressure oil introduction path is directed toward the throttle hole. Extra flow can be suppressed.
【００３６】さらに、請求項５の発明では、ケーシング
には、シリンダブロックを挟んで傾転支持部材とは反対
側に位置して一対の給排ポートを有した切換弁板を設け
ると共に、前記ケーシングには、該切換弁板の各給排ポ
ートに連通する一対の給排通路を設け、圧油導入路は該
各給排通路のうち高圧側の通路から高圧油を導く構成と
している。Further, according to the fifth aspect of the present invention, the casing is provided with a switching valve plate having a pair of supply / discharge ports located on a side opposite to the tilt support member with the cylinder block interposed therebetween, and Is provided with a pair of supply / discharge passages communicating with the respective supply / discharge ports of the switching valve plate, and the pressure oil introduction path is configured to guide the high pressure oil from the high pressure side passage among the respective supply / discharge passages.
【００３７】これにより、ケーシングに形成した一対の
給排通路のうち高圧側の給排通路から圧油導入路に向け
て高圧油を導出でき、この高圧油を傾転支持部材（斜板
の裏面）側へと導くことができる。Thus, high-pressure oil can be led out of the pair of supply / discharge passages formed in the casing from the supply / discharge passage on the high pressure side toward the pressure oil introduction passage, and the high pressure oil is displaced by the tilting support member (the back surface of the swash plate). ) Side.
【００３８】[0038]
【発明の実施の形態】以下、本発明の実施の形態による
可変容量型斜板式液圧回転機を、図１ないし図９に従っ
て油圧ポンプとして用いた場合を例に挙げて詳細に説明
する。なお、実施の形態では前述した従来技術と同一の
構成要素に同一の符号を付し、その説明を省略するもの
とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A variable displacement type swash plate type hydraulic rotary machine according to an embodiment of the present invention will be described in detail below with reference to FIGS. In the embodiment, the same components as those of the above-described conventional technology are denoted by the same reference numerals, and description thereof will be omitted.
【００３９】ここで、図１ないし図５は本発明の第１の
実施の形態を示している。図中、２１は本実施の形態に
よる可変容量型斜板式油圧ポンプのケーシングを示し、
該ケーシング２１は従来技術で述べたケーシング１と同
様に、閉塞端２２Ａ、開口端２２Ｂ、シリンダブロック
収容穴２２Ｃ及びシリンダ穴２２Ｄ，２２Ｅ等を有した
ケーシング本体２２と、フロントケーシングとしての蓋
体２３とから構成されている。Here, FIGS. 1 to 5 show a first embodiment of the present invention. In the figure, reference numeral 21 denotes a casing of the variable displacement swash plate type hydraulic pump according to the present embodiment,
Similar to the casing 1 described in the related art, the casing 21 includes a casing body 22 having a closed end 22A, an open end 22B, a cylinder block receiving hole 22C, cylinder holes 22D and 22E, and a lid 23 as a front casing. It is composed of
【００４０】また、蓋体２３の一側（表面側）には、図
１ないし図４に示す如く回転軸４用の軸挿通穴２３Ａの
周囲に位置して環状の嵌合凹部２３Ｂが形成され、該嵌
合凹部２３Ｂ内には図２に示す如く後述の傾転支持部材
２７が当接状態で嵌合されている。さらに、蓋体２３に
は後述する圧油導入路３１の一部を構成する油路３３等
が形成されている。On one side (front side) of the lid 23, an annular fitting recess 23B is formed around the shaft insertion hole 23A for the rotating shaft 4 as shown in FIGS. As shown in FIG. 2, a tilt support member 27 described later is fitted in the fitting recess 23B in a contact state. Further, the lid 23 is formed with an oil passage 33 and the like which constitute a part of a pressure oil introduction passage 31 described later.
【００４１】２４はケーシング２１の蓋体２３側に傾転
可能に設けられた斜板で、該斜板２４は図２ないし図４
に示す如く斜板本体２５と後述の摺動板２６とから構成
されている。そして、斜板本体２５は、従来技術で述べ
た斜板１２とほぼ同様に回転軸４用の軸挿通穴２５Ａ及
び左，右の脚部２５Ｂ，２５Ｂを有し、該各脚部２５Ｂ
の裏面側は傾転支持部材２７側に向けて円弧状に突出し
た凸湾曲面２５Ｃとなっている。Numeral 24 denotes a swash plate which is provided on the lid 21 side of the casing 21 so as to be tiltable.
As shown in the figure, the swash plate main body 25 and a slide plate 26 described later are constituted. The swash plate main body 25 has a shaft insertion hole 25A for the rotating shaft 4 and left and right legs 25B, 25B substantially in the same manner as the swash plate 12 described in the related art.
Has a convex curved surface 25C protruding in an arc shape toward the tilt support member 27 side.
【００４２】また、斜板本体２５には、傾転制御ピスト
ン１４，１５の先端に当接するピストン当接部２５Ｄ，
２５Ｅが一体形成され、該ピストン当接部２５Ｄ，２５
Ｅは傾転制御ピストン１４，１５からの傾転駆動力を斜
板本体２５に伝えるものである。一方、斜板本体２５の
各脚部２５Ｂのうち図４中の左側（ピストン９の吐出行
程側）に位置する脚部２５Ｂには、その凸湾曲面２５Ｃ
に窪み部２５Ｆが設けられ、該窪み部２５Ｆは斜板２４
の傾転方向に沿って矩形状に延びる浅底溝として形成さ
れている。The swash plate main body 25 has piston contact portions 25D, which contact the tips of the tilt control pistons 14, 15, respectively.
25E are formed integrally with the piston contact portions 25D, 25D.
E transmits the tilt driving force from the tilt control pistons 14 and 15 to the swash plate main body 25. On the other hand, of the legs 25B of the swash plate main body 25, the leg 25B located on the left side (the discharge stroke side of the piston 9) in FIG.
The swash plate 24 is provided with a recess 25F.
Are formed as shallow-bottom grooves extending in a rectangular shape along the tilting direction.
【００４３】２６は斜板本体２５の表面側に着脱可能に
設けられた摺動板で、該摺動板２６は耐摩耗性の高い硬
質の金属材料等により、図２ないし図４に示す如く一定
の板厚をもった環状板として形成されている。そして、
摺動板２６は表面側が平滑面２６Ａとなり、該平滑面２
６Ａはその表面に沿って各シュー１０を摺動可能に案内
する構成となっている。また、摺動板２６の内周側は回
転軸４が隙間をもって挿通される軸挿通穴２６Ｂとなっ
ている。Reference numeral 26 denotes a sliding plate detachably provided on the front surface side of the swash plate main body 25. The sliding plate 26 is made of a hard metal material having high wear resistance as shown in FIGS. It is formed as an annular plate having a certain plate thickness. And
The sliding plate 26 has a smooth surface 26A on the front surface side.
6A is configured to guide each shoe 10 slidably along its surface. The inner peripheral side of the sliding plate 26 is a shaft insertion hole 26B through which the rotating shaft 4 is inserted with a gap.
【００４４】２７は斜板本体２５の裏面側に位置してケ
ーシング２１の蓋体２３に設けられた傾転支持部材で、
該傾転支持部材２７は耐摩耗性の高い材料により図３に
示す如く形成され、中心側に回転軸４用の軸挿通穴２７
Ａが穿設された略円盤状の支持板２７Ｂと、軸挿通穴２
７Ａの左，右両側に離間して支持板２７Ｂの表面側に一
体形成された一対の凹湾曲面部２７Ｃ，２７Ｃとから大
略構成されている。Reference numeral 27 denotes a tilting support member provided on the lid 23 of the casing 21 and located on the back side of the swash plate main body 25.
The tilting support member 27 is formed of a material having high wear resistance as shown in FIG.
A having a substantially disk-shaped support plate 27 </ b> B,
The support plate 27B is roughly constituted by a pair of concave curved surface portions 27C, 27C integrally formed on the front side of the support plate 27B while being separated from the left and right sides of 7A.
【００４５】そして、傾転支持部材２７の各凹湾曲面部
２７Ｃは、斜板本体２５の各脚部２５Ｂを裏面側の凸湾
曲面２５Ｃを介して傾転可能に支持するため、各脚部２
５Ｂと同方向に延在し、凸湾曲面２５Ｃに対応する曲率
をもった円弧状凹部として形成されている。The concave curved surface portions 27C of the tilting support member 27 support the respective leg portions 25B of the swash plate main body 25 via the convex curved surface 25C on the back side so as to be tiltable.
5B, and is formed as an arc-shaped concave portion having a curvature corresponding to the convex curved surface 25C.
【００４６】ここで、傾転支持部材２７の各凹湾曲面部
２７Ｃ内には、斜板本体２５の各脚部２５Ｂが凸湾曲面
２５Ｃを介して摺動可能に嵌合され、これにより斜板２
４は図１中の矢示Ａ，Ｂ方向に傾転されるものである。
また、傾転支持部材２７の支持板２７Ｂは、図２に示す
ように蓋体２３の嵌合凹部２３Ｂ内に嵌合され、その裏
面側は嵌合凹部２３Ｂの底面側に当接（衝合）されてい
る。そして、支持板２７Ｂの裏面側には後述の油溝３０
が形成されている。Here, each leg 25B of the swash plate main body 25 is slidably fitted into each concave curved surface portion 27C of the tilt support member 27 via the convex curved surface 25C. 2
Numeral 4 is tilted in the directions indicated by arrows A and B in FIG.
The support plate 27B of the tilting support member 27 is fitted into the fitting recess 23B of the lid 23 as shown in FIG. 2, and the back surface thereof abuts against the bottom surface of the fitting recess 23B (abutment). ) Has been. An oil groove 30 described later is provided on the back side of the support plate 27B.
Are formed.
【００４７】２８Ａ，２８Ｂ，２８Ｃは傾転支持部材２
７の一方の凹湾曲面部２７Ｃ側に穿設された一方の油孔
（全体として油孔２８という）、２９Ａ，２９Ｂ，２９
Ｃは他方の凹湾曲面部２７Ｃ側に穿設された他方の油孔
（全体として油孔２９という）を示している。該各油孔
２８，２９は図３、図４に示す如く各凹湾曲面部２７Ｃ
内を軸方向に貫通して延び、各凹湾曲部２７Ｃ毎にそれ
ぞれ３個ずつ定間隔をもって形成されている。そして、
各油孔２８，２９は先端側が各凹湾曲面部２７Ｃの表面
側に開口し、基端側は油溝３０に開口している。28A, 28B and 28C are tilt support members 2
7, one oil hole (generally referred to as oil hole 28), 29A, 29B, 29 formed in the one concave curved surface portion 27C side.
C denotes the other oil hole (to be referred to as an oil hole 29 as a whole) formed on the other concave curved surface portion 27C side. Each of the oil holes 28 and 29 has a concave curved surface portion 27C as shown in FIGS.
It extends through the inside in the axial direction, and is formed at regular intervals of three for each concave curved portion 27C. And
Each of the oil holes 28 and 29 has a distal end opening on the surface side of each concave curved surface portion 27C, and a proximal end opening on the oil groove 30.
【００４８】また、これらの油孔２８Ａ〜２８Ｃと油孔
２９Ａ〜２９Ｃは、それぞれ孔径が異なる小径の絞り孔
として形成され、内部を流通する圧油に対して絞り抵抗
を与えることにより、斜板本体２５の凸湾曲面２５Ｃと
凹湾曲面部２７Ｃとの間の傾転摺動面に供給すべき油量
を、それぞれ個別に調整する構成となっている。The oil holes 28A to 28C and the oil holes 29A to 29C are formed as small-diameter throttle holes having different hole diameters, respectively. The amount of oil to be supplied to the tilt sliding surface between the convex curved surface 25C and the concave curved surface portion 27C of the main body 25 is individually adjusted.
【００４９】３０は傾転支持部材２７の裏面側に形成さ
れた油溝で、該油溝３０は支持板２７Ｂの裏面側に位置
し、軸挿通穴２７Ａを径方向外側から取囲む浅底の環状
溝として形成されている。そして、油溝３０は各油孔２
８，２９を互いに連通させ、後述の圧油導入路３１から
導かれた高圧油を各油孔２８，２９に分配供給するもの
である。また、傾転支持部材２７の支持板２７Ｂを蓋体
２３の嵌合凹部２３Ｂ内に嵌合した状態では、嵌合凹部
２３Ｂの底面側で油溝３０は図２に示す如く閉塞され、
油溝３０内の油液が両者の当接面（衝合面）側から外部
に漏洩するのを防止する構成となっている。Reference numeral 30 denotes an oil groove formed on the back side of the tilting support member 27. The oil groove 30 is located on the back side of the support plate 27B, and has a shallow bottom which surrounds the shaft insertion hole 27A from the radial outside. It is formed as an annular groove. The oil groove 30 is formed in each oil hole 2
8 and 29 are communicated with each other to distribute and supply high-pressure oil guided from a pressure oil introduction passage 31 described later to the oil holes 28 and 29. When the support plate 27B of the tilt support member 27 is fitted into the fitting recess 23B of the lid 23, the oil groove 30 is closed on the bottom side of the fitting recess 23B as shown in FIG.
The configuration is such that the oil liquid in the oil groove 30 is prevented from leaking outside from the contact surface (abutting surface) side of the two.
【００５０】３１はケーシング２１に設けた圧油導入路
で、該圧油導入路３１は、図１に示す如くケーシング本
体２２に形成され、一端側が高圧側の給排通路８Ｂに連
通した第１の油路３２と、該油路３２の他端側と連通す
るように蓋体２３に形成された第２の油路３３とから構
成されている。Reference numeral 31 denotes a pressure oil introduction passage provided in the casing 21. The pressure oil introduction passage 31 is formed in the casing main body 22 as shown in FIG. 1, and has a first end connected to a high pressure side supply / discharge passage 8B. , And a second oil passage 33 formed in the lid 23 so as to communicate with the other end of the oil passage 32.
【００５１】そして、蓋体２３の油路３３は、図２ない
し図４に示す如く嵌合凹部２３Ｂの径方向外側に位置し
て蓋体２３の表面側から板厚方向に延びた流入側の油路
部３３Ａと、該流入側の油路部３３Ａとほぼ平行に蓋体
２３の板厚方向に延び、嵌合凹部２３Ｂの底面側に開口
した流出側の油路部３３Ｂと、該油路部３３Ａ，３３Ｂ
間を連通させるため、図５に示す如く横方向に延びた中
継用の油路部３３Ｃとから構成されている。As shown in FIGS. 2 to 4, the oil passage 33 of the lid 23 is located radially outside the fitting recess 23B and extends from the surface of the lid 23 to the inflow side in the plate thickness direction. An oil passage portion 33A, an oil passage portion 33B on the outflow side which extends in the thickness direction of the lid 23 substantially in parallel with the oil passage portion 33A on the inflow side, and is opened on the bottom surface side of the fitting recess 23B; Parts 33A, 33B
In order to allow the communication therebetween, as shown in FIG. 5, a relay oil passage portion 33C extending in the lateral direction is provided.
【００５２】ここで、流入側の油路部３３Ａはケーシン
グ本体２２側の油路３２と連通し、流出側の油路部３３
Ｃは傾転支持部材２７の油溝３０に連通している。そし
て、前述した高圧側の給排通路８Ｂから油路３２に導か
れた高圧油は、蓋体２３の油路３３を通じて傾転支持部
材２７の油溝３０に供給された後、該油溝３０から各油
孔２８，２９内へと分配され、傾転支持部材２７の各凹
湾曲面部２７Ｃと斜板本体２５の各凸湾曲面２５Ｃとの
間の傾転摺動面へと供給される。The oil passage 33A on the inflow side communicates with the oil passage 32 on the casing body 22 side, and the oil passage 33 on the outflow side.
C communicates with the oil groove 30 of the tilt support member 27. The high-pressure oil guided from the high-pressure side supply / discharge passage 8 </ b> B to the oil passage 32 is supplied to the oil groove 30 of the tilting support member 27 through the oil passage 33 of the lid 23, and then is supplied to the oil groove 30. Are distributed into the oil holes 28 and 29, and are supplied to the tilt sliding surfaces between the concave curved surface portions 27C of the tilt support member 27 and the convex curved surfaces 25C of the swash plate body 25.
【００５３】本実施の形態による可変容量型斜板式油圧
ポンプは上述の如き構成を有するもので、その基本的作
動については従来技術によるものと格別差異はない。The variable displacement type swash plate type hydraulic pump according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.
【００５４】然るに、本実施の形態によれば、斜板本体
２５の各凸湾曲面２５Ｃと傾転支持部材２７の各凹湾曲
面部２７Ｃとの間に潤滑用の油液を供給するため、傾転
支持部材２７には一対の凹湾曲面部２７Ｃをそれぞれ貫
通して延びる複数の油孔２８Ａ〜２８Ｃ、油孔２９Ａ〜
２９Ｃを形成すると共に、蓋体２３の嵌合凹部２３Ｂと
傾転支持部材２７との衝合面側には各油孔２８，２９を
互いに連通させる環状の油溝３０を形成し、ケーシング
２１には該油溝３０に向けて高圧油を導く圧油導入路３
１を設ける構成としている。However, according to the present embodiment, since the lubricating oil liquid is supplied between each convex curved surface 25C of the swash plate main body 25 and each concave curved surface portion 27C of the tilting support member 27, the inclined liquid is supplied. A plurality of oil holes 28A to 28C and oil holes 29A to 29A extending through the pair of concave curved surface portions 27C in the rolling support member 27, respectively.
29C and an annular oil groove 30 for communicating the oil holes 28 and 29 with each other on the abutting surface between the fitting recess 23B of the lid 23 and the tilting support member 27. Is a pressure oil introduction path 3 for guiding high-pressure oil toward the oil groove 30.
1 is provided.
【００５５】この結果、ケーシング２１の圧油導入路３
１から導かれる高圧油を、傾転支持部材２７の油溝３０
により一方の凹湾曲面部２７Ｃ側の油孔２８Ａ〜２８Ｃ
と他方の凹湾曲面部２７Ｃ側の油孔２９Ａ〜２９Ｃとに
分配でき、斜板本体２５の各凸湾曲面２５Ｃと傾転支持
部材２７の各凹湾曲面部２７Ｃとの間のそれぞれの傾転
摺動面に対して潤滑用の油液を確実に供給することがで
きる。As a result, the pressure oil introduction passage 3 of the casing 21
The high-pressure oil guided from 1 is supplied to the oil groove 30 of the tilt support member 27.
Oil holes 28A to 28C on one concave curved surface portion 27C side
And the oil holes 29A to 29C on the other concave curved surface portion 27C side, and each tilting slide between each convex curved surface 25C of the swash plate main body 25 and each concave curved surface portion 27C of the tilt support member 27. The lubricating oil liquid can be reliably supplied to the moving surface.
【００５６】かくして、本実施の形態によれば、ケーシ
ング２１に設ける圧油導入路３１のうち蓋体２３側の油
路３３を、従来技術のように複数経路の油路１６Ｂ〜１
６Ｃ等によって構成する必要がなく、図２ないし図４に
例示した如く単一経路の油路部３３Ａ〜３３Ｃによって
構成でき、蓋体２３に形成する油路３３の穴加工を簡略
化することができる。Thus, according to the present embodiment, the oil passage 33 on the lid 23 side of the pressure oil introduction passage 31 provided in the casing 21 is replaced with a plurality of oil passages 16B to 16B as in the prior art.
6C or the like, and can be constituted by single-path oil passage portions 33A to 33C as illustrated in FIGS. 2 to 4, thereby simplifying the hole machining of the oil passage 33 formed in the lid 23. it can.
【００５７】特に、油路部３３Ａ〜３３Ｃのうち油路部
３３Ａ，３３Ｂは、蓋体２３の板厚方向に延びる短尺な
油穴として形成すればよいため、従来技術のように細長
いドリル等を奥深い位置まで送込むようにして穴加工を
行う必要がなくなり、穴加工時の作業性を確実に向上さ
せることができる。In particular, among the oil passage portions 33A to 33C, the oil passage portions 33A and 33B may be formed as short oil holes extending in the thickness direction of the lid 23. It is no longer necessary to drill a hole so as to feed it to a deep position, and the workability during drilling can be reliably improved.
【００５８】また、油孔２８Ａ〜２８Ｃと油孔２９Ａ〜
２９Ｃは、それぞれ孔径が異なる小径の絞り孔として形
成され、内部を流通する圧油に対して絞り抵抗を与える
構成としているから、斜板本体２５の各凸湾曲面２５Ｃ
と各凹湾曲面部２７Ｃとの間の傾転摺動面に供給する油
量を、それぞれの油孔２８Ａ〜２８Ｃ、油孔２９Ａ〜２
９Ｃ毎に個別に調整することが可能となる。The oil holes 28A to 28C and the oil holes 29A to 29C
Each of the convex curved surfaces 25C of the swash plate body 25 is formed as a small-diameter throttle hole having a different hole diameter and configured to give a throttle resistance to pressure oil flowing through the inside.
The amount of oil supplied to the tilting sliding surface between the first and second concave curved surface portions 27C is determined by the respective oil holes 28A to 28C and the oil holes 29A to 2C.
It is possible to individually adjust every 9C.
【００５９】即ち、斜板本体２５の各凸湾曲面２５Ｃと
各凹湾曲面部２７Ｃとの間に形成される隙間は、それぞ
れの表面加工の精度等によってバラツキが生じ易い上
に、両者の傾転摺動面に付加される荷重によって表面に
変形が生じることがあるため、油孔２８Ａ〜２８Ｃと油
孔２９Ａ〜２９Ｃとを同一の孔径に形成すると、前記隙
間が大きい位置から高圧油が漏洩し易くなる。そして、
この隙間位置からの漏洩油量が多くなった場合には油溝
３０、圧油導入路３１側でも圧力が低下し、油圧ポンプ
としての吐出性能に悪影響を与える可能性がある。That is, the gap formed between each convex curved surface 25C of the swash plate main body 25 and each concave curved surface portion 27C is likely to vary due to the accuracy of the respective surface processing and the like, and the two are tilted. Since the surface may be deformed by the load applied to the sliding surface, if the oil holes 28A to 28C and the oil holes 29A to 29C are formed to have the same hole diameter, high pressure oil leaks from a position where the gap is large. It will be easier. And
If the amount of oil leaking from the gap position increases, the pressure also decreases on the oil groove 30 and the pressure oil introduction path 31 side, which may adversely affect the discharge performance of the hydraulic pump.
【００６０】しかし、本実施の形態では、傾転支持部材
２７の各凹湾曲面部２７Ｃに形成した油孔２８Ａ〜２８
Ｃ、油孔２９Ａ〜２９Ｃをそれぞれ任意の孔径とし、互
いに独立した絞り機能を与える構成としている。このた
め、各油孔２８Ａ〜２８Ｃ、２９Ａ〜２９Ｃ毎に油量調
整を個別に行うことができ、斜板本体２５の各凸湾曲面
２５Ｃと各凹湾曲面部２７Ｃとの間には、それぞれの傾
転摺動面に隙間の大きさに応じた潤滑油を供給すること
ができる。However, in the present embodiment, the oil holes 28A-28 formed in each concave curved surface portion 27C of the tilt support member 27 are provided.
C and the oil holes 29A to 29C are each configured to have an arbitrary hole diameter to provide a throttle function independent of each other. For this reason, the oil amount can be adjusted individually for each of the oil holes 28A to 28C and 29A to 29C, and between each convex curved surface 25C of the swash plate main body 25 and each concave curved surface portion 27C, Lubricating oil according to the size of the gap can be supplied to the tilting sliding surface.
【００６１】従って、本実施の形態によれば、斜板２４
と傾転支持部材２７との間の傾転摺動面を良好に潤滑で
き、斜板２４の傾転動作を安定させることができると共
に、潤滑用油液を供給するための穴加工を簡略化でき、
製作時の作業性を向上させることができる。Therefore, according to the present embodiment, the swash plate 24
And the tilting sliding surface between the tilting support member 27 and the tilting support member 27 can be satisfactorily lubricated, the tilting operation of the swash plate 24 can be stabilized, and the drilling of the lubricating oil liquid can be simplified. Can,
Workability during manufacturing can be improved.
【００６２】また、それぞれの傾転摺動面における隙間
位置等に対応させて潤滑油の供給量を調整でき、例えば
油圧ポンプの吐出性能を高め、信頼性を向上させること
ができる。そして、斜板２４を傾転駆動するときの摺動
抵抗を小さくでき、比較的小さい駆動力で斜板２４を安
定して傾転することができる。Further, the supply amount of the lubricating oil can be adjusted according to the gap position or the like on each tilting sliding surface, and for example, the discharge performance of the hydraulic pump can be improved, and the reliability can be improved. The sliding resistance when the swash plate 24 is tilted can be reduced, and the swash plate 24 can be stably tilted with a relatively small driving force.
【００６３】なお、前記第１の実施の形態では、蓋体２
３の嵌合凹部２３Ｂと傾転支持部材２７の支持板２７Ｂ
との衝合面間に位置して、支持板２７Ｂの裏面側に油溝
３０を形成するものとして述べたが、本発明はこれに限
らず、例えば嵌合凹部２３Ｂの底面側に油溝を形成して
もよく、両者の当接面に共に油溝を設ける構成としても
よい。In the first embodiment, the lid 2
3 and the support plate 27B of the tilting support member 27
It has been described that the oil groove 30 is formed on the back side of the support plate 27B between the abutting surfaces of the support plate 27B. However, the present invention is not limited to this. The oil groove may be formed, and an oil groove may be provided on both contact surfaces.
【００６４】また、前記第１の実施の形態では、傾転支
持部材２７の各凹湾曲面部２７Ｃにそれぞれ３本の油孔
２８Ａ〜２８Ｃ、油孔２９Ａ〜２９Ｃを形成するものと
して述べたが、本発明はこれに限るものではなく、例え
ば各凹湾曲面部２７Ｃにそれぞれ１本、２本または４本
以上の油孔を設ける構成としてもよい。In the first embodiment, three oil holes 28A to 28C and three oil holes 29A to 29C are formed in each concave curved surface portion 27C of the tilt support member 27. The present invention is not limited to this. For example, one, two, or four or more oil holes may be provided in each concave curved surface portion 27C.
【００６５】次に、図６ないし図９は本発明の第２の実
施の形態を示し、本実施の形態の特徴は、斜板本体の一
対の脚部にそれぞれ油孔を穿設し、これらの油孔を通じ
てそれぞれの傾転摺動面に潤滑用の油液を供給する構成
としたことにある。なお、本実施の形態では前記第１の
実施の形態と同一の構成要素に同一の符号を付し、その
説明を省略するものとする。Next, FIGS. 6 to 9 show a second embodiment of the present invention. The feature of this embodiment is that oil holes are formed in a pair of legs of the swash plate body, respectively. The lubricating oil liquid is supplied to each tilting sliding surface through the oil hole of (1). Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
【００６６】図中、４１はケーシング２１の蓋体２３側
に傾転可能に設けられた斜板で、該斜板４１は図６ない
し図８に示すように斜板本体４２と後述の摺動板４３と
から構成されている。In the drawing, reference numeral 41 denotes a swash plate provided on the cover 21 side of the casing 21 so as to be tiltable, and the swash plate 41 and the swash plate main body 42 as shown in FIGS. And a plate 43.
【００６７】そして、斜板本体４２は、摺動板４３の外
径寸法よりも長尺に延び、長さ方向中間部に回転軸４用
の軸挿通穴４２Ａが穿設された摺動板支承部４２Ｂと、
軸挿通穴４２Ａを挟んで該摺動板支承部４２Ｂの左，右
両側に一体形成された一対の脚部４２Ｃ，４２Ｃと、該
各脚部４２Ｃの背面側に形成され、後述の傾転支持部材
４７側に向けて突出した凸湾曲面４２Ｄとから大略構成
されている。The swash plate main body 42 extends longer than the outer diameter of the slide plate 43, and has a slide plate support in which a shaft insertion hole 42A for the rotary shaft 4 is formed at an intermediate portion in the longitudinal direction. Part 42B;
A pair of legs 42C, 42C integrally formed on the left and right sides of the slide plate support 42B with the shaft insertion hole 42A interposed therebetween, and formed on the back side of each of the legs 42C, and a tilt support described later. It is roughly constituted by a convex curved surface 42D protruding toward the member 47 side.
【００６８】また、斜板本体４２には、摺動板支承部４
２Ｂと各脚部４２Ｃとの表面側に亘り、摺動板４３が当
接（嵌合）状態で固着される嵌合凹部４２Ｅが一体形成
されている。そして、該嵌合凹部４２Ｅは摺動板４３の
外径に対応する略円形状の凹部として形成され、その深
さは摺動板４３の板厚にほぼ対応している。また、摺動
板支承部４２Ｂの上，下両端側には、傾転制御ピストン
１４，１５の先端に当接するピストン当接部４２Ｆ，４
２Ｇが一体形成され、該ピストン当接部４２Ｆ，４２Ｇ
は傾転制御ピストン１４，１５からの傾転駆動力を斜板
本体４２に伝えるものである。The swash plate main body 42 has a sliding plate support 4
A fitting recess 42E to which the sliding plate 43 is fixed in an abutting (fitting) state is integrally formed over the front surface side of the 2B and each leg 42C. The fitting recess 42 </ b> E is formed as a substantially circular recess corresponding to the outer diameter of the sliding plate 43, and its depth substantially corresponds to the thickness of the sliding plate 43. Further, piston contact portions 42F, 4 that contact the tip of the tilt control pistons 14, 15 are provided on both upper and lower ends of the sliding plate support portion 42B.
2G are integrally formed, and the piston contact portions 42F, 42G
Is for transmitting the tilt driving force from the tilt control pistons 14 and 15 to the swash plate main body 42.
【００６９】一方、斜板本体４２の各脚部４２Ｃのうち
図８中の左側（ピストン９の吐出行程側）に位置する脚
部４２Ｃには、その凸湾曲面４２Ｄに窪み部４２Ｈが設
けられ、該窪み部４２Ｈは斜板４１の傾転方向に沿って
矩形状に延びる浅底溝として形成されている。そして、
窪み部４２Ｈは後述する傾転支持部材４７の連通孔４８
と常時連通し、連通孔４８からの高圧油が後述の油孔４
４Ａ〜４４Ｃ、４５Ａ〜４５Ｃ側に供給されるのを補償
している。On the other hand, of the legs 42C of the swash plate main body 42, the leg 42C located on the left side (discharge stroke side of the piston 9) in FIG. 8 is provided with a concave portion 42H on its convex curved surface 42D. The recess 42H is formed as a shallow groove extending in a rectangular shape along the tilting direction of the swash plate 41. And
The recess 42H is formed with a communication hole 48 of a tilt support member 47 described later.
The high-pressure oil from the communication hole 48 is always in communication with the oil hole 4 described later.
The supply to the 4A to 44C and 45A to 45C side is compensated.
【００７０】４３は斜板本体４２の表面側に着脱可能に
設けられた摺動板で、該摺動板４３は前記第１の実施の
形態で述べた摺動板２６と同様に構成され、平滑面４３
Ａ及び軸挿通穴４３Ｂ等を有している。そして、摺動板
４３は斜板本体４２の嵌合凹部４２Ｅ内に当接（衝合）
状態で嵌合されることにより、後述の油溝４６から高圧
油が衝合面側に漏洩するのを防止している。Reference numeral 43 denotes a sliding plate detachably provided on the front surface side of the swash plate main body 42. The sliding plate 43 has the same configuration as the sliding plate 26 described in the first embodiment. Smooth surface 43
A and a shaft insertion hole 43B. Then, the sliding plate 43 abuts (abuts) in the fitting concave portion 42E of the swash plate main body 42.
By being fitted in this state, high-pressure oil is prevented from leaking from the oil groove 46 described later to the abutment surface side.
【００７１】４４Ａ，４４Ｂ，４４Ｃは斜板本体４２の
一方の脚部４２Ｃ側に穿設された一方の油孔（全体とし
て油孔４４という）、４５Ａ，４５Ｂ，４５Ｃは他方の
脚部４２Ｃ側に穿設された他方の油孔（全体として油孔
４５という）を示している。該各油孔４４，４５は図７
ないし図９に示す如く各脚部４２Ｃ内を軸方向に貫通し
て延び、各脚部４２Ｃ毎にそれぞれ３個ずつ定間隔をも
って形成されている。そして、各油孔４４，４５は先端
側が各凸湾曲面４２Ｄに開口し、基端側は嵌合凹部４２
Ｅ内で油溝４６に開口している。Reference numerals 44A, 44B and 44C denote one oil hole (generally referred to as an oil hole 44) formed on one leg 42C side of the swash plate main body 42, and 45A, 45B and 45C denote the other leg 42C side. The other oil hole (to be referred to as an oil hole 45 as a whole) drilled in FIG. The oil holes 44 and 45 are shown in FIG.
As shown in FIG. 9, each leg 42C extends through the inside of the leg 42C in the axial direction, and is formed at regular intervals by three for each leg 42C. Each of the oil holes 44 and 45 has a distal end side opening to each convex curved surface 42D, and a base end side having a fitting concave portion 42D.
It opens in the oil groove 46 in E.
【００７２】ここで、油孔４４Ａ〜４４Ｃのうち、例え
ば油孔４４Ｃは斜板本体４２の窪み部４２Ｈと連通し、
該窪み部４２Ｈを油溝４６に常時連通させる構成となっ
ている。また、油孔４４Ａ〜４４Ｃと油孔４５Ａ〜４５
Ｃは、それぞれ孔径が異なる小径の絞り孔として形成さ
れ、内部を流通する圧油に対して絞り抵抗を与えること
により、斜板本体４２の各凸湾曲面４２Ｄと後述の各凹
湾曲面部４７Ｃとの間の傾転摺動面に供給すべき油量
を、それぞれ個別に調整するものである。Here, among the oil holes 44A to 44C, for example, the oil hole 44C communicates with the recess 42H of the swash plate main body 42,
The recess 42 </ b> H is configured to always communicate with the oil groove 46. Oil holes 44A to 44C and oil holes 45A to 45
C is formed as a small-diameter throttle hole having a different hole diameter, and provides a throttle resistance to the pressure oil flowing through the inside, thereby forming each convex curved surface 42D of the swash plate main body 42 and each concave curved surface portion 47C described later. The amount of oil to be supplied to the tilting sliding surface during the adjustment is individually adjusted.
【００７３】４６は斜板本体４２の嵌合凹部４２Ｅに形
成された油溝で、該油溝４６は嵌合凹部４２Ｅの底面側
に位置し、軸挿通穴４２Ａを径方向外側から略コ字形状
をなして取囲む浅底の溝として形成されている。そし
て、油溝４６は各油孔４４，４５を互いに連通させ、例
えば油孔４４Ｂを介して後述の油路４９側から導かれた
高圧油を各油孔４４，４５に分配供給するものである。
また、摺動板４３を斜板本体４２の嵌合凹部４２Ｅ内に
嵌合した状態では、嵌合凹部４２Ｅの底面側で油溝４６
は図６に示す如く閉塞され、油溝４６内の油液が両者の
衝合面側から外部に漏洩するのを防止する構成となって
いる。Reference numeral 46 denotes an oil groove formed in the fitting recess 42E of the swash plate main body 42. The oil groove 46 is located on the bottom surface side of the fitting recess 42E, and the shaft insertion hole 42A is substantially U-shaped from the outside in the radial direction. It is formed as a shallow groove that surrounds in shape. The oil groove 46 allows the oil holes 44 and 45 to communicate with each other, and distributes and supplies high-pressure oil guided from an oil passage 49 described later via the oil hole 44B to the oil holes 44 and 45, for example. .
When the sliding plate 43 is fitted in the fitting recess 42E of the swash plate main body 42, the oil groove 46 is formed on the bottom side of the fitting recess 42E.
6 is closed as shown in FIG. 6, and is configured to prevent the oil liquid in the oil groove 46 from leaking to the outside from the abutting surface side of the two.
【００７４】４７は斜板本体４２の裏面側に位置してケ
ーシング２１の蓋体２３に設けられた傾転支持部材で、
該傾転支持部材４７は前記第１の実施の形態で述べた傾
転支持部材２７とほぼ同様に構成され、軸挿通穴４７
Ａ、支持板４７Ｂ及び一対の凹湾曲面部４７Ｃ，４７Ｃ
等を有している。Reference numeral 47 denotes a tilting support member provided on the lid 23 of the casing 21 and located on the back side of the swash plate main body 42.
The tilting support member 47 has substantially the same configuration as the tilting support member 27 described in the first embodiment.
A, support plate 47B and a pair of concave curved surface portions 47C, 47C
Etc.
【００７５】４８は傾転支持部材４７の一方の凹湾曲面
部４７Ｃ側に穿設された連通孔で、該連通孔４８は図
６、図７に示す如く各凹湾曲面部４７Ｃ内を斜めに貫通
して延び、孔径の小さい絞り孔として形成されている。
そして、連通孔４８は先端側が各凹湾曲面部４７Ｃの表
面側に開口して斜板本体４２の窪み部４２Ｈと連通し、
基端側は蓋体２３の油路４９と連通している。Reference numeral 48 denotes a communication hole formed on one concave curved surface portion 47C side of the tilt support member 47. The communication hole 48 penetrates obliquely through each concave curved surface portion 47C as shown in FIGS. And is formed as a throttle hole having a small hole diameter.
The communication hole 48 has a distal end opening to the surface side of each concave curved surface portion 47C to communicate with the concave portion 42H of the swash plate main body 42,
The proximal end communicates with the oil passage 49 of the lid 23.
【００７６】４９が蓋体２３に形成した油路で、該油路
４９は前記第１の実施の形態で述べた油路３３に替えて
設けられ、図１に例示したケーシング本体２２側の油路
３２と共に圧油導入路３１を構成するものである。そし
て、蓋体２３の油路４９は、図６ないし図９に示す如く
嵌合凹部２３Ｂの径方向外側に位置して蓋体２３の表面
側から板厚方向に延びた流入側の油路部４９Ａと、該流
入側の油路部４９Ａとほぼ平行に蓋体２３の板厚方向に
延び、嵌合凹部２３Ｂの底面側に開口した流出側の油路
部４９Ｂと、該油路部４９Ａ，４９Ｂ間を連通させるた
め、図９に示す如く横方向に延びた中継用の油路部４９
Ｃとから構成されている。Reference numeral 49 denotes an oil passage formed in the lid 23. The oil passage 49 is provided in place of the oil passage 33 described in the first embodiment, and is provided on the casing body 22 side illustrated in FIG. The pressure oil introduction passage 31 is constituted together with the passage 32. The oil passage 49 of the lid 23 is located radially outside the fitting recess 23B and extends in the plate thickness direction from the surface of the lid 23 as shown in FIGS. 49A, an outflow-side oil passage portion 49B extending substantially in parallel with the inflow-side oil passage portion 49A in the thickness direction of the lid 23, and opening on the bottom surface side of the fitting recess 23B; In order to allow communication between the first and second relays 49B, a relay oil passage 49 extending in the lateral direction as shown in FIG.
C.
【００７７】ここで、流入側の油路部４９Ａはケーシン
グ本体２２側の油路３２と連通し、流出側の油路部４９
Ｃは傾転支持部材４７の連通孔４８に連通している。そ
して、図１に示す高圧側の給排通路８Ｂから油路３２に
導かれた高圧油は、蓋体２３の油路４９及び傾転支持部
材４７の連通孔４８を通じて斜板本体４２の窪み部４２
Ｈに供給される。The oil passage 49A on the inflow side communicates with the oil passage 32 on the casing body 22 side, and the oil passage 49A on the outflow side.
C communicates with a communication hole 48 of the tilt support member 47. The high-pressure oil guided from the high-pressure side supply / discharge passage 8 </ b> B to the oil passage 32 shown in FIG. 1 passes through the oil passage 49 of the lid 23 and the communication hole 48 of the tilting support member 47 to form the depression of the swash plate main body 42. 42
H.
【００７８】また、窪み部４２Ｈ内に一旦供給された圧
油は、斜板本体４２の油孔４４Ｂを通じて油溝４６に供
給された後、該油溝４６から油孔４４Ａ，４４Ｃ及び油
孔４５Ａ〜４５Ｃへと分配され、これによって、傾転支
持部材４７の各凹湾曲面部４７Ｃと斜板本体４２の各凸
湾曲面４２Ｄとの間には、それぞれの傾転摺動面に対し
てほぼ均等に潤滑用の油液が供給されるものである。The pressure oil once supplied into the recess 42H is supplied to the oil groove 46 through the oil hole 44B of the swash plate main body 42, and then from the oil groove 46, the oil holes 44A and 44C and the oil hole 45A. To 45C, whereby between the concave curved surface portion 47C of the tilt support member 47 and each convex curved surface 42D of the swash plate main body 42, the respective tilt sliding surfaces are substantially equal. Is supplied with a lubricating oil liquid.
【００７９】かくして、このように構成される本実施の
形態にあっても、蓋体２３側の油路４９を単一経路の油
路部４９Ａ〜４９Ｃによって構成でき、蓋体２３に形成
する油路４９の穴加工を簡略化することができ、これに
よって、前記第１の実施の形態とほぼ同様の作用効果を
得ることができる。Thus, even in the present embodiment configured as described above, the oil passage 49 on the lid 23 side can be constituted by the single oil passage portions 49A to 49C, and the oil formed on the lid 23 can be formed. Drilling of the path 49 can be simplified, whereby substantially the same operation and effect as in the first embodiment can be obtained.
【００８０】また、斜板本体４２の各脚部４２Ｃに形成
した油孔４４Ａ〜４４Ｃ、油孔４５Ａ〜４５Ｃをそれぞ
れ任意の孔径とし、互いに独立した絞り機能を与える構
成とすることにより、各油孔４４Ａ〜４４Ｃ、４５Ａ〜
４５Ｃ毎に油量調整を個別に行うことができ、斜板本体
４２の各凸湾曲面４２Ｄと各凹湾曲面部４７Ｃとの間に
は、それぞれの傾転摺動面に隙間の大きさに応じた潤滑
油を供給することができる。The oil holes 44A to 44C and the oil holes 45A to 45C formed in the legs 42C of the swash plate main body 42 have arbitrary diameters, respectively, so as to provide a throttle function independent of each other. Holes 44A-44C, 45A-
The oil amount can be adjusted individually for each 45C, and between each convex curved surface 42D and each concave curved surface portion 47C of the swash plate main body 42, depending on the size of the gap between the respective inclined sliding surfaces. Lubricating oil can be supplied.
【００８１】さらに、傾転支持部材４７に形成した連通
孔４８によっても絞り機能を与えることができ、蓋体２
３の油路４９から斜板本体４２の窪み部４２Ｈ側に向け
て供給する圧油の油量を連通孔４８によって調整でき
る。Further, a diaphragm function can be provided by the communication hole 48 formed in the tilt support member 47.
The amount of pressurized oil supplied from the third oil passage 49 toward the recess 42 </ b> H of the swash plate main body 42 can be adjusted by the communication hole 48.
【００８２】なお、前記第２の実施の形態では、斜板本
体４２の嵌合凹部４２Ｅと摺動板４３との衝合面間に位
置して、嵌合凹部４２Ｅの底面側に油溝４６を形成する
ものとして述べたが、本発明はこれに限らず、例えば摺
動板４３の裏面側に油溝を形成してもよく、両者の衝合
面に共に油溝を設ける構成としてもよい。In the second embodiment, the oil groove 46 is located between the fitting surface of the fitting recess 42E of the swash plate main body 42 and the abutting surface of the sliding plate 43, and is provided on the bottom surface side of the fitting recess 42E. However, the present invention is not limited to this. For example, an oil groove may be formed on the back surface side of the sliding plate 43, and an oil groove may be provided on both abutting surfaces. .
【００８３】また、前記第２の実施の形態では、斜板本
体４２の各脚部４２Ｃにそれぞれ３本の油孔４４Ａ〜４
４Ｃ、油孔４５Ａ〜４５Ｃを形成するものとして述べた
が、本発明はこれに限るものではなく、例えば各脚部４
２Ｃにそれぞれ１本、２本または４本以上の油孔を設け
る構成としてもよい。In the second embodiment, each of the legs 42C of the swash plate main body 42 has three oil holes 44A to 44A.
4C and the oil holes 45A to 45C have been described. However, the present invention is not limited to this.
It is good also as composition provided with one, two, or four or more oil holes in 2C, respectively.
【００８４】さらに、前記各実施の形態では、可変容量
型斜板式液圧回転機として油圧ポンプを例に挙げて説明
したが、本発明はこれに限らず、例えば可変容量斜板式
の油圧モータ等にも広く適用できる。Further, in each of the above embodiments, the hydraulic pump has been described as an example of the variable displacement type swash plate type hydraulic rotating machine. However, the present invention is not limited to this, and the present invention is not limited to this. Can be widely applied.
【００８５】[0085]
【発明の効果】以上詳述した如く、請求項１に記載の発
明によれば、斜板用の傾転支持部材に一対の凹湾曲面部
をそれぞれ貫通して延びる油孔を設け、ケーシングと傾
転支持部材との当接面側には、これらの油孔を互いに連
通させる油溝を設けると共に、前記ケーシングには該油
溝に向けて高圧油を導く圧油導入路を設ける構成とした
から、ケーシングの圧油導入路から導かれる高圧油をケ
ーシングと傾転支持部材との間の油溝により、傾転支持
部材の各油孔側へと分配して供給でき、傾転支持部材の
各凹湾曲面部と斜板の各脚部との間の傾転摺動面を良好
に潤滑できると共に、斜板の傾転動作を安定させること
ができ、潤滑用油液を供給するための穴加工を簡略化
し、製作時の作業性を向上できる。As described above in detail, according to the first aspect of the present invention, the tilting support member for the swash plate is provided with oil holes extending through the pair of concave curved surface portions, respectively, and is tilted with the casing. On the contact surface side with the rolling support member, an oil groove for connecting these oil holes to each other is provided, and the casing is provided with a pressure oil introduction path for guiding high-pressure oil toward the oil groove. The high-pressure oil guided from the pressure oil introduction passage of the casing can be distributed and supplied to each oil hole side of the tilt support member by the oil groove between the casing and the tilt support member, and each of the tilt support members can be supplied. Drilling for supplying lubricating oil liquid, as well as lubricating the tilting sliding surface between the concave curved surface and each leg of the swash plate, stabilizing the tilting operation of the swash plate Can be simplified, and workability at the time of production can be improved.
【００８６】また、請求項２に記載の発明では、傾転支
持部材に設けた各油孔のうち少なくともいずれか一つの
油孔を小径の絞り孔により構成しているから、斜板支持
部材の各凹湾曲面部と斜板の各脚部との間に油孔を通じ
て供給される油量を調整でき、圧油導入路からの高圧油
が油孔側に向けて余分に流れるのを抑えることができ
る。そして、斜板と傾転支持部材との間の傾転摺動面に
供給する潤滑油量を両者の隙間等に対応させて調整で
き、漏洩油量を確実に低減できると共に、液圧回転機と
しての性能を高めることができ、信頼性を向上できる。According to the second aspect of the present invention, at least one of the oil holes provided in the tilting support member is formed by a small-diameter throttle hole. The amount of oil supplied through the oil hole between each concave curved surface portion and each leg of the swash plate can be adjusted, and it is possible to suppress excess flow of high-pressure oil from the pressure oil introduction path toward the oil hole side. it can. The amount of lubricating oil supplied to the tilting sliding surface between the swash plate and the tilting support member can be adjusted according to the gap between the two, and the amount of leaking oil can be reliably reduced, and the hydraulic rotating machine can be adjusted. Performance and reliability can be improved.
【００８７】一方、請求項３に記載の発明では、斜板本
体に各脚部をそれぞれ貫通して延び少なくとも一方が窪
み部に連通した油孔を設け、前記斜板本体と摺動板との
当接面側には、各油孔を互いに連通させる油溝を設ける
と共に、前記傾転支持部材には一対の凹湾曲面部のうち
少なくとも一方の凹湾曲面部を貫通して延び前記窪み部
に連通する連通孔を設け、ケーシングには該連通孔に向
けて高圧油を導く圧油導入路を設ける構成としたから、
ケーシングの圧油導入路から傾転支持部材の連通孔へと
導かれる高圧油を、窪み部を介して少なくとも一方の油
孔内に供給することにより、斜板本体と摺動板との間の
油溝内へと油液を供給でき、該油溝を経由して斜板本体
の全て油孔内へと油液を供給することができると共に、
斜板本体の各脚部と各凹湾曲面部との間に潤滑用の油液
を供給でき、両者の間の傾転摺動面を潤滑状態に保持す
ることができる。According to the third aspect of the present invention, the swash plate main body is provided with an oil hole extending through each leg portion and at least one of the oil holes communicates with the recessed portion. On the contact surface side, an oil groove is provided for communicating the oil holes with each other, and the tilt support member extends through at least one of the pair of concave curved surface portions and communicates with the concave portion. Since the casing is provided with a pressure oil introduction path for guiding high-pressure oil toward the communication hole,
By supplying high-pressure oil guided from the pressure oil introduction path of the casing to the communication hole of the tilt support member into at least one oil hole through the recess, the gap between the swash plate main body and the sliding plate is provided. The oil liquid can be supplied into the oil groove, and the oil liquid can be supplied into all the oil holes of the swash plate main body via the oil groove,
Lubricating oil can be supplied between each leg and each concave curved surface of the swash plate main body, and the tilting sliding surface between the two can be maintained in a lubricated state.
【００８８】また、請求項４に記載の発明では、斜板本
体の各油孔と傾転支持部材の連通孔のうち少なくともい
ずれか一つの孔部を小径の絞り孔により構成しているか
ら、斜板の各脚部と傾転支持部材の各凹湾曲面部との間
に絞り孔を通じて供給される油量を調整でき、圧油導入
路からの高圧油が絞り孔側に向けて余分に流れるのを抑
えることができる。そして、斜板と傾転支持部材との間
の傾転摺動面に供給する潤滑油量を両者の隙間等に対応
させて調整でき、漏洩油量を確実に低減できると共に、
液圧回転機としての性能を高めることができ、信頼性を
向上できる。According to the fourth aspect of the present invention, at least one of the oil holes of the swash plate main body and the communication hole of the tilting support member is constituted by a small-diameter throttle hole. The amount of oil supplied through the throttle hole between each leg of the swash plate and each concave curved surface of the tilting support member can be adjusted, and high-pressure oil from the pressure oil introduction path flows excessively toward the throttle hole side. Can be suppressed. Then, the amount of lubricating oil supplied to the tilt sliding surface between the swash plate and the tilt support member can be adjusted according to the gap between the two, and the amount of leaking oil can be reliably reduced, and
The performance as a hydraulic rotating machine can be improved, and the reliability can be improved.
【００８９】さらに、請求項５に記載の発明では、ケー
シングに形成した一対の給排通路のうち高圧側の通路に
圧油導入路を連通させることにより、高圧側の給排通路
からの高圧油を傾転支持部材の裏面側から斜板との傾転
摺動面へと導くことができ、両者の間の傾転摺動面を良
好な潤滑状態に保持することができる。Further, according to the fifth aspect of the present invention, the high-pressure oil supply passage is connected to the high-pressure side passage of the pair of supply and discharge passages formed in the casing. Can be guided from the back side of the tilt support member to the tilt sliding surface with the swash plate, and the tilt sliding surface between the two can be maintained in a good lubricating state.
【図１】本発明の第１の実施の形態による可変容量型斜
板式油圧ポンプを示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a variable displacement swash plate type hydraulic pump according to a first embodiment of the present invention.
【図２】回転軸を取外した状態で蓋体、傾転支持部材及
び斜板を拡大して示す図１中の矢示II−II方向からみた
断面図である。FIG. 2 is an enlarged cross-sectional view showing a lid, a tilting support member, and a swash plate in a state where a rotation shaft is removed, as viewed from the direction of arrows II-II in FIG. 1;
【図３】斜板、傾転支持部材及び蓋体を拡大して示す分
解斜視図である。FIG. 3 is an exploded perspective view showing a swash plate, a tilt support member, and a lid in an enlarged manner.
【図４】斜板、傾転支持部材及び蓋体を拡大して示す図
３とは異なる方向からみた分解斜視図である。FIG. 4 is an exploded perspective view showing a swash plate, a tilting support member, and a lid in an enlarged manner, as viewed from a direction different from FIG. 3;
【図５】蓋体の嵌合凹部内に傾転支持部材を嵌合させた
状態を示す正面図である。FIG. 5 is a front view showing a state in which a tilt support member is fitted into a fitting concave portion of the lid.
【図６】第２の実施の形態による可変容量型斜板式油圧
ポンプに用いる蓋体、傾転支持部材及び斜板を拡大して
示す断面図である。FIG. 6 is an enlarged sectional view showing a lid, a tilting support member, and a swash plate used in a variable displacement swash plate type hydraulic pump according to a second embodiment.
【図７】図６中の摺動板、斜板本体、傾転支持部材及び
蓋体を拡大して示す分解斜視図である。FIG. 7 is an exploded perspective view showing a sliding plate, a swash plate main body, a tilting support member, and a lid in FIG. 6 in an enlarged manner.
【図８】摺動板、斜板本体、傾転支持部材及び蓋体を拡
大して示す図７とは異なる方向からみた分解斜視図であ
る。FIG. 8 is an exploded perspective view showing a sliding plate, a swash plate main body, a tilting support member, and a lid in an enlarged manner as viewed from a direction different from FIG. 7;
【図９】蓋体の嵌合凹部内に傾転支持部材及び斜板本体
を組付けた状態を示す正面図である。FIG. 9 is a front view showing a state in which a tilt support member and a swash plate main body are assembled in a fitting concave portion of a lid.
【図１０】従来技術による可変容量型斜板式油圧ポンプ
を示す縦断面図である。FIG. 10 is a longitudinal sectional view showing a variable displacement swash plate type hydraulic pump according to the related art.
【図１１】蓋体及び傾転支持部材を拡大して示す図１０
中の矢示XI−XI方向からみた断面図である。FIG. 11 is an enlarged view of a lid and a tilt support member.
It is sectional drawing seen from the arrow XI-XI direction in the middle.
４ 回転軸 ５ シリンダブロック ６ シリンダ ７ 切換弁板 ７Ａ，７Ｂ 給排ポート ８Ａ，８Ｂ 給排通路 ９ ピストン １０ シュー １４，１５ 傾転制御ピストン（傾転アクチュエータ） ２１ ケーシング ２２ ケーシング本体 ２３ 蓋体 ２４，４１ 斜板 ２５，４２ 斜板本体 ２５Ｂ，４２Ｃ 脚部 ２５Ｃ，４２Ｄ 凸湾曲面 ２５Ｆ，４２Ｈ 窪み部 ２６，４３ 摺動板 ２６Ａ，４３Ａ 平滑面 ２７，４７ 傾転支持部材 ２７Ｃ，４７Ｃ 凹湾曲面部 ２８，２９ 油孔 ３０ 油溝 ３１ 圧油導入路 ３２，３３，４９ 油路 ４４，４５ 油孔 ４６ 油溝 ４８ 連通孔 Reference Signs List 4 rotating shaft 5 cylinder block 6 cylinder 7 switching valve plate 7A, 7B supply / discharge port 8A, 8B supply / discharge passage 9 piston 10 shoe 14, 15 tilt control piston (tilt actuator) 21 casing 22 casing body 23 cover 24, 41 Swash plate 25, 42 Swash plate main body 25B, 42C Leg 25C, 42D Convex curved surface 25F, 42H Recess 26, 43 Sliding plate 26A, 43A Smooth surface 27, 47 Tilting support member 27C, 47C Concave curved surface 28 , 29 Oil hole 30 Oil groove 31 Pressure oil introduction path 32, 33, 49 Oil path 44, 45 Oil hole 46 Oil groove 48 Communication hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂入 哲也 茨城県土浦市神立町650番地 日立建機株 式会社土浦工場内 Ｆターム(参考） 3H070 AA01 BB04 CC27 CC31 DD46 DD91 3H084 AA08 AA51 BB06 BB23 CC33 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tetsuya Sakairi 650, Kandachi-cho, Tsuchiura-shi, Ibaraki F-term in the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. (Reference) 3H070 AA01 BB04 CC27 CC31 DD46 DD91 3H084 AA08 AA51 BB06 BB23 CC33
Claims (5)
能に設けられた回転軸と、軸方向に複数のシリンダが穿
設され、前記ケーシング内で該回転軸と一体的に回転す
るシリンダブロックと、該シリンダブロックの各シリン
ダに往復動可能に挿嵌された複数のピストンと、該各ピ
ストンの突出側の端部に装着されたシューと、表面側が
該各シューを摺動可能に案内する平滑面となり、裏面側
に凸湾曲状をなす一対の脚部が設けられた斜板と、該斜
板の裏面側に位置して前記ケーシングに当接して取付け
られ、該斜板を傾転可能に支持するため前記各脚部に対
応する一対の凹湾曲面部を有した傾転支持部材と、前記
斜板を傾転駆動する傾転アクチュエータとからなる可変
容量型斜板式液圧回転機において、 前記傾転支持部材には、前記一対の凹湾曲面部と斜板の
各脚部との間の傾転摺動面に潤滑用の油液を供給するた
め前記一対の凹湾曲面部をそれぞれ貫通して延びる油孔
を設け、前記ケーシングと傾転支持部材との当接面側に
は、該一対の油孔を互いに連通させる油溝を設け、かつ
前記ケーシングには該油溝に向けて高圧油を導く圧油導
入路を設けたことを特徴とする可変容量型斜板式液圧回
転機。A casing, a rotating shaft rotatably provided in the casing, a cylinder block in which a plurality of cylinders are bored in an axial direction, and which rotates integrally with the rotating shaft in the casing; A plurality of pistons reciprocally inserted into the cylinders of the cylinder block, shoes mounted on the protruding ends of the pistons, and a smooth surface whose surface guides the shoes slidably. And a swash plate provided with a pair of convexly curved legs on the back side, and mounted on the back side of the swash plate in contact with the casing to tiltably support the swash plate. A variable displacement type swash plate type hydraulic rotary machine comprising: a tilt support member having a pair of concave curved surface portions corresponding to the respective leg portions; and a tilt actuator that tilts and drives the swash plate. The rolling support member includes the pair of recesses. An oil hole extending through each of the pair of concave curved surface portions is provided for supplying lubricating oil liquid to a tilting sliding surface between the curved surface portion and each leg portion of the swash plate, and the tilting sliding surface is provided with the casing. An oil groove that connects the pair of oil holes to each other is provided on a contact surface side with the support member, and a pressure oil introduction path that guides high-pressure oil toward the oil groove is provided in the casing. Variable capacity type swash plate type hydraulic rotary machine.
孔のうち少なくともいずれか一つの油孔は小径の絞り孔
により構成してなる請求項１に記載の可変容量型斜板式
液圧回転機。2. The variable displacement swash plate type hydraulic device according to claim 1, wherein at least one of the pair of oil holes provided in the tilt support member is formed by a small-diameter throttle hole. Rotating machine.
能に設けられた回転軸と、軸方向に複数のシリンダが穿
設され、前記ケーシング内で該回転軸と一体的に回転す
るシリンダブロックと、該シリンダブロックの各シリン
ダに往復動可能に挿嵌された複数のピストンと、該各ピ
ストンの突出側の端部に装着されたシューと、表面側が
該各シューを摺動可能に案内する平滑面となり、裏面側
に凸湾曲状をなす一対の脚部が設けられた斜板と、該斜
板の裏面側に位置して前記ケーシングに当接して取付け
られ、該斜板を傾転可能に支持するため前記各脚部に対
応する一対の凹湾曲面部を有した傾転支持部材と、前記
斜板を傾転駆動する傾転アクチュエータとからなる可変
容量型斜板式液圧回転機において、 前記斜板は、裏面側に前記一対の脚部が一体に設けら
れ、前記傾転支持部材により傾転可能に支持される斜板
本体と、該斜板本体の表面側に当接して取付けられ、前
記各シューを案内するための平滑面を有した摺動板とか
ら構成し、 前記斜板本体には、前記一対の脚部の凸湾曲面のうち少
なくともいずれか一方の凸湾曲面側に形成され、前記斜
板本体の傾転方向に延びた浅底の窪み部と、前記各脚部
の凸湾曲面と傾転支持部材の各凹湾曲面部との間の傾転
摺動面にそれぞれ潤滑用の油液を供給するため前記各脚
部をそれぞれ貫通して延び、少なくとも一方が前記窪み
部に連通した油孔とを設け、 前記斜板本体と摺動板との当接面側には、前記一対の油
孔を互いに連通させる油溝を設け、かつ前記傾転支持部
材には、前記一対の凹湾曲面部のうち少なくとも一方の
凹湾曲面部を貫通して延び前記窪み部に連通する連通孔
を設け、前記ケーシングには該連通孔に向けて高圧油を
導く圧油導入路を設けたことを特徴とする可変容量型斜
板式液圧回転機。3. A casing, a rotating shaft rotatably provided in the casing, a cylinder block in which a plurality of cylinders are bored in an axial direction, and which rotates integrally with the rotating shaft in the casing. A plurality of pistons reciprocally inserted into the cylinders of the cylinder block, shoes mounted on the protruding ends of the pistons, and a smooth surface whose surface guides the shoes slidably. And a swash plate provided with a pair of convexly curved legs on the back side, and mounted on the back side of the swash plate in contact with the casing to tiltably support the swash plate. A variable displacement type swash plate type hydraulic rotating machine comprising: a tilt support member having a pair of concave curved surface portions corresponding to the respective leg portions; and a tilt actuator for tilting the swash plate. The plate has a pair of legs on the back side. A swash plate main body that is provided integrally and is tiltably supported by the tilt support member; and has a smooth surface that is mounted in contact with the front side of the swash plate main body and guides the shoes. The swash plate body is formed on at least one of the convex curved surfaces of the convex curved surfaces of the pair of legs, and extends in the tilt direction of the swash plate body. Each of the legs is provided to supply a lubricating oil to a tilting sliding surface between a concave portion having a shallow bottom and a convex curved surface of each leg and a concave curved surface of the tilt support member. An oil hole extending through each of the oil holes, at least one of which is in communication with the recess, is provided on the contact surface between the swash plate main body and the sliding plate. And the tilt support member penetrates at least one of the pair of concave curved surface portions. The communication hole communicating with the recess extending Te provided, said casing a variable capacity swash plate type hydraulic rotary machine, characterized in that a pressure oil introduction passage for guiding the high pressure oil toward the communicating hole.
傾転支持部材の連通孔のうち少なくともいずれか一つの
孔部は、小径の絞り孔により構成してなる請求項３に記
載の可変容量型斜板式液圧回転機。4. The swash plate body according to claim 3, wherein at least one of the pair of oil holes provided in the swash plate main body and the communication hole of the tilting support member is formed of a small-diameter throttle hole. Variable capacity swash plate type hydraulic rotary machine.
ックを挟んで前記傾転支持部材とは反対側に位置して一
対の給排ポートを有した切換弁板を設けると共に、前記
ケーシングには、該切換弁板の各給排ポートに連通する
一対の給排通路を設け、前記圧油導入路は該各給排通路
のうち高圧側の通路から高圧油を導く構成としてなる請
求項１，２，３または４に記載の可変容量型斜板式液圧
回転機。5. A switching valve plate having a pair of supply / discharge ports located on the opposite side of the tilting support member with the cylinder block interposed therebetween, wherein the casing has A pair of supply / discharge passages communicating with respective supply / discharge ports of the switching valve plate, and the pressure oil introduction path is configured to guide high-pressure oil from a high pressure side passage among the respective supply / discharge passages. The variable capacity type swash plate type hydraulic rotary machine according to 3 or 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10257495A JP2000073940A (en) | 1998-08-27 | 1998-08-27 | Variable displacement type swash plate type hydraulic rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10257495A JP2000073940A (en) | 1998-08-27 | 1998-08-27 | Variable displacement type swash plate type hydraulic rotary machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000073940A true JP2000073940A (en) | 2000-03-07 |
Family
ID=17307091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10257495A Pending JP2000073940A (en) | 1998-08-27 | 1998-08-27 | Variable displacement type swash plate type hydraulic rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000073940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749864A (en) * | 2019-03-26 | 2020-10-09 | 纳博特斯克有限公司 | Swash plate, swash plate pump, and construction machine |
-
1998
- 1998-08-27 JP JP10257495A patent/JP2000073940A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749864A (en) * | 2019-03-26 | 2020-10-09 | 纳博特斯克有限公司 | Swash plate, swash plate pump, and construction machine |
| CN111749864B (en) * | 2019-03-26 | 2024-06-07 | 纳博特斯克有限公司 | Swash plate, swash plate pump, and construction machine |
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