JP2587538Y2 - Variable displacement vane pump - Google Patents
Variable displacement vane pumpInfo
- Publication number
- JP2587538Y2 JP2587538Y2 JP1992073634U JP7363492U JP2587538Y2 JP 2587538 Y2 JP2587538 Y2 JP 2587538Y2 JP 1992073634 U JP1992073634 U JP 1992073634U JP 7363492 U JP7363492 U JP 7363492U JP 2587538 Y2 JP2587538 Y2 JP 2587538Y2
- Authority
- JP
- Japan
- Prior art keywords
- cam ring
- shaft member
- pump
- pump chamber
- variable displacement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は揺動するカムリングによ
りポンプ吐出量を可変とした可変容量型のベーンポンプ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable displacement vane pump in which a pump discharge amount is made variable by an oscillating cam ring.
【０００２】[0002]
【従来の技術】かかる可変容量型ポンプの一例を図６に
示す。ポンプハウジング４の円形空間の中心部には円形
リング状のロータ１が配設され、その中心開口は図略の
回転軸に固定されてこれと一体回転する（図６の矢
印）。上記ロータ１とポンプハウジング４間には円形の
厚肉板状のカムリング３が設けてあり、該カムリング３
は一方の側部がハウジング４内壁に固定した軸部材３１
に当接し、他方の側部がシール部材３２を介してハウジ
ング４内壁に当接して、上記軸部材３１を支点に上下に
揺動自在となっている。2. Description of the Related Art An example of such a variable displacement pump is shown in FIG. A circular ring-shaped rotor 1 is provided at the center of the circular space of the pump housing 4, and its central opening is fixed to a rotation shaft (not shown) and rotates integrally therewith (arrow in FIG. 6 ). A circular shape is provided between the rotor 1 and the pump housing 4.
A thick-plate cam ring 3 is provided.
A shaft member 31 having one side fixed to the inner wall of the housing 4
, And the other side portion is in contact with the inner wall of the housing 4 via the seal member 32, and is swingable up and down around the shaft member 31 as a fulcrum.
【０００３】カムリング３の、上記他方の側部は一部が
ポンプハウジング４の凹所に突出してバネ受け３３とな
っており、該バネ受け３３と上記凹所の下側面との間に
はコイルバネ３４が配設してある。A part of the other side of the cam ring 3 projects into a recess of the pump housing 4 to form a spring receiver 33, and a coil spring is provided between the spring receiver 33 and the lower surface of the recess. 34 are provided.
【０００４】上記ロータ１には周方向等間隔に、径方向
へ進退自在に複数（図では９枚）のベーン２が設けてあ
り、各ベーン２は内端面に吐出圧を受けて進出し、先端
がカムリング３の内周面に当接して隣接するベーン２と
の間にポンプ室Ｐを形成している。このポンプ室Ｐは各
ベーン２と上記カムリング３の両側面に当接するハウジ
ング４壁により閉鎖されている。そして、容積が次第に
拡大するポンプ室Ｐに面してハウジング４壁に形成され
た吸入ポート４１より流体が吸入され、容積が次第に縮
小するポンプ室Ｐに面してハウジング４壁に形成された
吐出ポート４２へ流体が圧送吐出される。[0004] The rotor 1 is provided with a plurality (nine in the figure) of vanes 2 at equal intervals in the circumferential direction so as to be able to advance and retreat in the radial direction. The pump chamber P is formed between the cam ring 3 and the adjacent vane 2 with the leading end in contact with the inner peripheral surface of the cam ring 3. The pump chamber P is closed by a wall of a housing 4 that abuts each vane 2 and both side surfaces of the cam ring 3. Then, fluid is sucked from a suction port 41 formed in the wall of the housing 4 facing the pump chamber P whose volume gradually increases, and discharge is formed in the wall of the housing 4 facing the pump chamber P whose volume gradually decreases. The fluid is pumped and discharged to the port 42.
【０００５】上記カムリング３の、軸部材３１よりシー
ル部材３２へ至る上半部とポンプハウジング４内壁間の
空間内には負荷の使用条件に応じた圧力が生じるように
流量を制御する制御圧が制御バルブ（図略）を介して導
入されており、一方、カムリング３の下半部とポンプハ
ウジング４壁間の空間内はリターン圧となっている。し
かして、ポンプ回転数が上昇して吐出量が大きくなり吐
出圧が上昇すると、制御圧を制御してカムリング３は軸
部材３１を支点としてコイルバネ３４のバネ力に抗して
下方へ揺動し、カムリング３の中心とロータ１の中心の
偏心が小さい状態にしてベーン２間に形成されるポンプ
室Ｐの、回転に伴う容積変化は小さくなり、吐出量を小
さくする。In the space between the upper half of the cam ring 3 from the shaft member 31 to the seal member 32 and the inner wall of the pump housing 4, a control pressure for controlling a flow rate so as to generate a pressure corresponding to a use condition of a load is provided. It is introduced through a control valve (not shown), while the space between the lower half of the cam ring 3 and the wall of the pump housing 4 has a return pressure. When the pump rotation speed increases and the discharge amount increases to increase the discharge pressure, the control pressure is controlled, and the cam ring 3 swings downward against the spring force of the coil spring 34 about the shaft member 31 as a fulcrum. With the eccentricity between the center of the cam ring 3 and the center of the rotor 1 being small, a change in volume of the pump chamber P formed between the vanes 2 due to rotation is small, and the discharge amount is small.
【０００６】ポンプ回転数が低下して吐出量が小さくな
り吐出圧が低下すると、制御圧を制御して上記カムリン
グ３はコイルバネ３４のバネ力により上方へ揺動し、偏
心したカムリング３との間に形成された上記各ポンプ室
Ｐはその容積変化を大きくして吐出量を多くする。この
ようにして、ポンプ回転数が上昇するとカムリング３が
同心方向へ移動せしめられてポンプ容量が減少し、ポン
プ回転数が低下するとカムリング３が偏心方向へ移動せ
しめられてポンプ容量が増大して、ポンプ回転数に無関
係に吐出量を制御して負荷の使用条件に応じた圧力にな
るように制御する。When the pump rotation speed decreases and the discharge rate decreases and the discharge pressure decreases, the control pressure is controlled to cause the cam ring 3 to swing upward by the spring force of the coil spring 34 and to move between the cam ring 3 and the eccentric cam ring 3. Each of the pump chambers P formed as described above increases the volume change and increases the discharge amount. In this manner, when the pump rotation speed increases, the cam ring 3 is moved concentrically and the pump capacity decreases, and when the pump rotation speed decreases, the cam ring 3 moves in the eccentric direction and the pump capacity increases, The discharge amount is controlled irrespective of the pump speed, and the pressure is controlled so as to be in accordance with the use condition of the load.
【０００７】[0007]
【考案が解決しようとする課題】ところで、軸部材３１
に当接するカムリング３の外周面は、図７に示す如く、
円形断面の軸部材３１に対して開いた曲面をなす浅い凹
所３５となっており、軸部材３１とは曲面底部の一点Ａ
で当接している。そして、この部分のカムリング３内周
面には吐出ポートの高圧が作用しているためカムリング
３は外方へ押されており、上記一点Ａに押付力が集中し
て、両者の当接部に磨耗を生じ、あるいはカムリング３
が変形する等の不具合を生じることがあった。[Problems to be Solved by the Invention] By the way, the shaft member 31
As shown in FIG. 7, the outer peripheral surface of the cam ring 3 contacting the
It is a shallow recess 35 that forms a curved surface that opens to the shaft member 31 having a circular cross section.
In contact. Since the high pressure of the discharge port is acting on the inner peripheral surface of the cam ring 3 in this portion, the cam ring 3 is pushed outward, and the pressing force is concentrated at the point A and the contact portion between the two points is contacted. Wear or cam ring 3
In some cases, such as deformation.
【０００８】本考案はかかる課題を解決するもので、当
接部の摩耗やカムリングの変形を生じない可変容量型ベ
ーンポンプを提供することを目的とする。An object of the present invention is to solve such a problem, and an object of the present invention is to provide a variable displacement vane pump which does not cause abrasion of a contact portion and deformation of a cam ring.
【０００９】[0009]
【課題を解決するための手段】本発明の構成を説明する
と、ロータ１の外周に径方向外方へ突出付勢されたベー
ン２を等間隔で複数設け、上記ロータ１の外方には外周
の一か所に設けた円形断面の軸部材３１を中心に揺動可
能としたカムリング３を配設して、該カムリング３の内
周面に上記各ベーン２の先端を当接せしめるとともに、
各ベーン２および上記カムリング３の両側面にそれぞれ
ハウジング４壁を当接せしめて各ベーン２間に閉鎖され
たポンプ室Ｐを形成し、上記ハウジング４壁に設けた吸
入ポート４１より各ポンプ室Ｐへ順次流体を吸入すると
ともに各ポンプ室Ｐより上記ハウジング４壁に設けた吐
出ポート４２へ流体を順次吐出し、上記カムリング３の
略半周外面に制御圧を作用せしめて、制御圧に応じて上
記カムリング３を偏心位置より同心位置へ揺動移動せし
めて吐出量を一定に調整するようになした可変容量型ベ
ーンポンプであって、上記軸部材３１に当接するカムリ
ング３の外周面を、上記カムリング３の板厚方向の全長
にわたって、軸部材３１の円周面よりも後退した深い凹
状に成形して、該凹所３６の対向する側壁を軸部材３１
の外周にそれぞれ当接せしめるとともに上記凹所３６の
底面と軸部材３１の円周面の間に空間３７を形成したも
のである。To explain the structure of the present invention, a plurality of vanes 2 urged radially outward are provided on the outer periphery of the rotor 1 at equal intervals. A cam ring 3 which is swingable around a shaft member 31 having a circular cross section provided at one position is provided, and the tip of each of the vanes 2 is brought into contact with the inner peripheral surface of the cam ring 3.
A wall of the housing 4 is brought into contact with both sides of each vane 2 and the cam ring 3 to form a pump chamber P closed between the vanes 2, and each pump chamber P is provided from a suction port 41 provided in the wall of the housing 4. And sequentially discharges the fluid from each pump chamber P to a discharge port 42 provided in the wall of the housing 4 to apply a control pressure to a substantially half outer peripheral surface of the cam ring 3. cam ring 3 a variable displacement vane pump without to adjust the discharge amount swung move to the concentric position than the eccentric position constant, the outer peripheral surface of the cam ring 3 abuts on the shaft member 31, the cam ring 3 Total length in the thickness direction of
Over the shaft member 31, it is formed into a deep concave shape receding from the circumferential surface of the shaft member 31, and opposing side walls of the recess 36 are formed on the shaft member 31.
Each outer periphery of the contact brought Rutotomoni the recess 36 of the
A space 37 is formed between the bottom surface and the circumferential surface of the shaft member 31 .
【００１０】[0010]
【作用】上記構成においては、軸部材３１の外周は、カ
ムリング３の凹所３６の底面と当接せず、凹所３６の対
向側壁に２箇所で、カムリング３の板厚方向の全長にわ
たって当接しているから、押付力は広範囲に分散せしめ
られ、当接部に磨耗を生じることはない。また、押付力
の分散によりカムリング３の変形も防止される。[Action] In the above configuration, the outer periphery of the shaft member 31, mosquito
The cam ring 3 does not come into contact with the bottom surface of the concave portion 36 of the mulling 3, but does not contact the entire length of the cam ring 3 in the plate thickness direction.
Since they are in contact with each other, the pressing force is dispersed over a wide range, and the contact portions do not wear. Further, the deformation of the cam ring 3 is also prevented by the dispersion of the pressing force.
【００１１】[0011]
【実施例１】図１には本考案の一実施例におけるカムリ
ングと軸部材の当接部を示す。ベーンポンプの全体構造
は既に説明した従来例と同一である。FIG. 1 shows a contact portion between a cam ring and a shaft member according to an embodiment of the present invention. The overall structure of the vane pump is the same as the conventional example described above.
【００１２】図において、ハウジング４壁に固定された
円形断面の軸部材３１に対向するカムリング３の外周面
の突出部には、端面中央に、板厚方向の全長にわたって
深い略半楕円の凹所３６が形成されて、この溝状の凹所
３６内に軸部材３１が位置している。軸部材３１の外周
は上記凹所３６の傾斜して対向する開口縁側壁に上下の
２箇所Ｂ，Ｃで当接しており、軸部材３１の円形に突出
する頂面とこれより後退した凹所３６の底面との間には
三日月形の空間３７が形成されている。In the drawing, a protruding portion of the outer peripheral surface of the cam ring 3 opposed to the shaft member 31 having a circular cross section fixed to the wall of the housing 4 has a substantially half depth at the center of the end surface over the entire length in the plate thickness direction. An elliptical recess 36 is formed, and the shaft member 31 is located in the groove-shaped recess 36. Circumference two places above and below the opening edge side wall opposed to the slope of the recess 36 B of the shaft member 31 abuts in C, and was recessed from the top surface and this protruding circular shaft 31 recess A crescent-shaped space 37 is formed between the space 36 and the bottom surface.
【００１３】かかる構造において、軸部材３１を中心と
するカムリング３の揺動は、その凹所３６の開口縁の対
向側壁が軸部材３１の外周に２箇所Ｂ，Ｃで当接した状
態でなされ、２箇所Ｂ，Ｃの当接部はそれぞれ線接触と
なる。しかして、カムリング３の内周側より吐出圧の押
圧力が作用しても（図の矢印）、これに伴って軸部材３
１と凹所３６に生じる押付力は上記２箇所Ｂ，Ｃの線状
当接部に分散されて小さく抑えられ、当接部の磨耗を生
じることはない。また、押付力が分散される結果カムリ
ング３が変形することもない。In this structure, the cam ring 3 swings about the shaft member 31 in a state where the opposing side walls of the opening edge of the recess 36 abut on the outer periphery of the shaft member 31 at two points B and C. The contact parts of the two places B and C are line contact
Become . Thus, even if the pressing force of the discharge pressure acts from the inner peripheral side of the cam ring 3 (arrow in the figure), the shaft member 3
1 and pressing force generated concave office 36 the two positions B, C linear
It is dispersed to the contact portion and kept small, so that the contact portion does not wear. Further, the cam ring 3 is not deformed as a result of the dispersion of the pressing force.
【００１４】[0014]
【実施例２】軸部材３１の外周に当接する凹所３６の開
口縁の対向側壁を、図２に示す如く、軸部材３１の外周
面に沿う円弧面となせば、２箇所Ｂ，Ｃの当接部が面接
触となるから、当接部に発生する押付力をさらに小さく
することができ、摩耗の発生とカムリング３の変形をよ
り効果的に防止できる。Embodiment 2 If the opposite side wall of the opening edge of the recess 36 which contacts the outer periphery of the shaft member 31 is formed into an arc surface along the outer peripheral surface of the shaft member 31 as shown in FIG. Since the contact portion is in surface contact, the pressing force generated at the contact portion can be further reduced, and the occurrence of wear and the deformation of the cam ring 3 can be more effectively prevented.
【００１５】[0015]
【実施例３】図３、図４に示すように、カムリング３の
本体内を横断貫通する圧力導入孔３８を設けて、軸部材
３１とカムリング３との間に形成される空間３７と、カ
ムリング３内方の吐出ポートに通じるポンプ室Ｐとを連
通せしめる。これにより、高圧の吐出油が上記空間３７
に導入されて軸部材３１とカムリング３の２箇所Ｂ，Ｃ
の当接部が潤滑され、摩耗の発生がさらに効果的に防止
される。Third Embodiment As shown in FIGS. 3 and 4, a pressure introducing hole 38 penetrating through the main body of the cam ring 3 is provided, and a space 37 formed between the shaft member 31 and the cam ring 3 is provided. (3) The pump chamber P communicating with the inner discharge port is communicated. As a result, high-pressure discharge oil is supplied to the space 37.
At the two positions B and C of the shaft member 31 and the cam ring 3.
The contact portion is lubricated, and the occurrence of wear is more effectively prevented.
【００１６】[0016]
【実施例４】図５に示す如く、上記実施例３における貫
通孔３８に代えて、カムリング３の一側面に内外を連通
する溝３９を形成しても同様の効果が得られる。Fourth Embodiment As shown in FIG. 5, a similar effect can be obtained by forming a groove 39 communicating the inside and the outside on one side surface of the cam ring 3 instead of the through hole 38 in the third embodiment.
【００１７】[0017]
【考案の効果】以上の如く、本考案の可変容量型ベーン
ポンプによれば、軸部材とカムリングの当接部の摩耗や
カムリングの変形を効果的に防止して、ポンプ寿命の大
幅な延長を図ることができる。As described above, according to the variable displacement vane pump of the present invention, wear of the contact portion between the shaft member and the cam ring and deformation of the cam ring are effectively prevented, and the pump life is greatly extended. be able to.
【図１】本考案の実施例１におけるカムリング当接部の
水平断面図である。FIG. 1 is a horizontal cross-sectional view of a cam ring contact portion in Embodiment 1 of the present invention.
【図２】本考案の実施例２におけるカムリング当接部の
水平断面図である。FIG. 2 is a horizontal sectional view of a cam ring contact portion according to a second embodiment of the present invention.
【図３】本考案の実施例３におけるカムリング当接部の
水平断面図である。FIG. 3 is a horizontal sectional view of a cam ring contact portion according to a third embodiment of the present invention.
【図４】図３のIV−IV線に沿う断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;
【図５】本考案の実施例４におけるカムリング当接部の
垂直断面図である。FIG. 5 is a vertical sectional view of a cam ring contact portion according to a fourth embodiment of the present invention.
【図６】従来例を示すポンプ部の水平断面図である。FIG. 6 is a horizontal sectional view of a pump section showing a conventional example.
【図７】従来例を示すカムリング当接部の水平断面図で
ある。FIG. 7 is a horizontal sectional view of a cam ring contact portion showing a conventional example.
１ ロータ ２ ベーン ３ カムリング ３１ 軸部材 ３６ 凹所３７ 空間 ４ ハウジング ４１ 吸入ポート ４２ 吐出ポート Ｐ ポンプ室Reference Signs List 1 rotor 2 vane 3 cam ring 31 shaft member 36 recess 37 space 4 housing 41 suction port 42 discharge port P pump chamber
───────────────────────────────────────────────────── フロントページの続き (72)考案者 前川 洋一郎 愛知県刈谷市朝日町１丁目１番地 豊田 工機株式会社内 (72)考案者 奥田 郁夫 愛知県刈谷市朝日町１丁目１番地 豊田 工機株式会社内 (56)参考文献 特公 平３−50912（ＪＰ，Ｂ２) 特公 平３−10038（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F04C 15/04 321 F04C 2/344 331──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichiro Maekawa 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Inside Toyota Koki Co., Ltd. (72) Ikuo Okuda 1-1-1, Asahi-cho, Kariya-shi, Aichi Toyoda Koki (56) References JP 3-50912 (JP, B2) JP 3-10038 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) F04C 15/04 321 F04C 2/344 331
Claims (1)
れたベーンを等間隔で複数設け、上記ロータの外方には
外周の一か所に設けた円形断面の軸部材を中心に揺動可
能としたカムリングを配設して、該カムリングの内周面
に上記各ベーンの先端を当接せしめるとともに、各ベー
ンおよび上記カムリングの両側面にそれぞれハウジング
壁を当接せしめて各ベーン間に閉鎖されたポンプ室を形
成し、上記ハウジング壁に設けた吸入ポートより各ポン
プ室へ順次流体を吸入するとともに各ポンプ室より上記
ハウジング壁に設けた吐出ポートへ流体を順次吐出し、
上記カムリングの略半周外面に制御圧を作用せしめて、
制御圧に応じて上記カムリングを偏心位置より同心位置
へ揺動移動せしめて吐出量を一定に調整するようになし
た可変容量型ベーンポンプであって、上記軸部材に当接
するカムリングの外周面を、上記カムリングの板厚方向
の全長にわたって、軸部材の円周面よりも後退した深い
凹状に成形して、該凹所の対向する側壁を軸部材の外周
にそれぞれ当接せしめるとともに上記凹所の底面と軸部
材の円周面の間に空間を形成したことを特徴とする可変
容量型ベーンポンプ。1. A plurality of vanes urged radially outward on an outer periphery of a rotor are provided at regular intervals, and a circular cross-section shaft member provided at one position on the outer periphery is provided outside the rotor. A swingable cam ring is disposed, and the tip of each of the vanes is brought into contact with the inner peripheral surface of the cam ring, and the housing wall is brought into contact with each side surface of each vane and the cam ring, so that the space between the vanes is reduced. Forming a closed pump chamber, sequentially sucking fluid into each pump chamber from a suction port provided in the housing wall, and sequentially discharging fluid from each pump chamber to a discharge port provided in the housing wall,
Applying a control pressure to the outer surface of the cam ring approximately half way around,
A variable displacement vane pump that swings the cam ring from an eccentric position to a concentric position in accordance with a control pressure to adjust the discharge amount to a constant value. Thickness direction of the above cam ring
Over the entire length of, by molding a deep concave shape recessed from the circumferential surface of the shaft member, the bottom surface and the shaft portion of each of the opposing sidewalls of the recess to the outer periphery of the shaft member abutting brought Rutotomoni the recess
A variable displacement vane pump , wherein a space is formed between circumferential surfaces of materials .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992073634U JP2587538Y2 (en) | 1992-09-29 | 1992-09-29 | Variable displacement vane pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992073634U JP2587538Y2 (en) | 1992-09-29 | 1992-09-29 | Variable displacement vane pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0630484U JPH0630484U (en) | 1994-04-22 |
| JP2587538Y2 true JP2587538Y2 (en) | 1998-12-16 |
Family
ID=13523941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992073634U Expired - Fee Related JP2587538Y2 (en) | 1992-09-29 | 1992-09-29 | Variable displacement vane pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2587538Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009004456B4 (en) * | 2009-01-13 | 2012-01-19 | Mahle International Gmbh | Variable volume cell pump with swiveling spool |
| JP6171852B2 (en) * | 2013-10-30 | 2017-08-02 | アイシン精機株式会社 | Oil pump device |
-
1992
- 1992-09-29 JP JP1992073634U patent/JP2587538Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0630484U (en) | 1994-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |