JPH0537028Y2 - - Google Patents
Info
- Publication number
- JPH0537028Y2 JPH0537028Y2 JP1987134307U JP13430787U JPH0537028Y2 JP H0537028 Y2 JPH0537028 Y2 JP H0537028Y2 JP 1987134307 U JP1987134307 U JP 1987134307U JP 13430787 U JP13430787 U JP 13430787U JP H0537028 Y2 JPH0537028 Y2 JP H0537028Y2
- Authority
- JP
- Japan
- Prior art keywords
- gear
- outer gear
- peripheral surface
- ring member
- oil
- 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 - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、トロコイドポンプの改良に関するも
のである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a trochoid pump.
（従来の技術）
内歯を有するアウタギヤと、該内歯と係合して
油室を画成する外歯を有するインナギヤとを備え
たトロコイドポンプはコンパクトでかつ簡素な構
造であるため、低価格であり、また外歯と内歯と
の間のすべり速度が小さいので、摩耗やかみ合い
音が少なく、さらに輸送流体の汚濁・温度上昇等
の外乱に対する信頼性が高いといつた特徴を有す
ることから、従来より自動変速機用オイルポンプ
等の車両用オイルポンプとして広く用いられてい
る。(Prior Art) A trochoid pump that includes an outer gear with internal teeth and an inner gear with external teeth that engages with the internal teeth to define an oil chamber is compact and has a simple structure, so it is inexpensive. In addition, since the sliding speed between the external and internal teeth is low, there is little wear and engagement noise, and it also has the characteristics of high reliability against external disturbances such as contamination of the transport fluid and temperature rise. , has been widely used as oil pumps for vehicles such as oil pumps for automatic transmissions.
ところが、かかるトロコイドポンプにおいて
は、アウタギヤがポンプハウジングに嵌合されて
回転可能に支承されているが、ハウジングとアウ
タギヤとの間にクリアランスがあるために、回転
によつてアウタギヤがふらつき、このアウタギヤ
のふらつきによりインナギヤとの歯先クリアラン
スが変化し、回転バランスが悪いという問題があ
る。 However, in such trochoid pumps, the outer gear is fitted into the pump housing and rotatably supported, but since there is a clearance between the housing and the outer gear, the outer gear wobbles due to rotation, causing the outer gear to become unstable. The wobbling causes the tooth tip clearance with the inner gear to change, causing a problem of poor rotational balance.
そこで、アウタギヤの外周に、アウタギヤの回
転方向に向かつて深さが漸次浅くなるステツプ状
の軸受凹部を円周状等分割位置に複数形成し、上
記軸受凹部に持込まれた油がアウタギヤの回転に
より軸受凹部の壁にぶつかつて圧力上昇し、これ
によつてアウタギヤが円周上一様に軸受されるよ
うにしたものが提案されている（例えば実開昭61
−171885号公報参照）。 Therefore, on the outer periphery of the outer gear, a plurality of step-shaped bearing recesses whose depth gradually becomes shallower in the direction of rotation of the outer gear are formed at equally divided circumferential positions. A system has been proposed in which the pressure increases when the bearing hits the wall of the recess, and this causes the outer gear to be uniformly supported on the circumference (for example, in 1983).
-Refer to Publication No. 171885).
（考案が解決しようとする課題）
ところが、そのような効果が得られるために
は、軸受凹部はハウジングとの間の最も長い所で
も50μ程度とする必要があるのに、アウタギヤは
焼結合金で形成されるため、それによつて得られ
る精度は0.1mmのオーダーであり、焼結によるそ
のような軸受凹部の形成は困難であり、また、研
削加工による形成も困難である。そのため、上記
従来の技術のものでは、軸受凹部によつて十分な
動圧を得ることはできず、回転バランスの向上を
図ることはできないと思われる。(Problem to be solved by the invention) However, in order to obtain such an effect, the bearing recess must be approximately 50μ at its longest distance from the housing, but the outer gear is made of sintered alloy. Since the precision obtained thereby is of the order of 0.1 mm, it is difficult to form such a bearing recess by sintering, and it is also difficult to form it by grinding. Therefore, with the above-mentioned conventional technology, it is not possible to obtain sufficient dynamic pressure through the bearing recess, and it seems that it is not possible to improve the rotational balance.
本考案はかかる点に鑑みてなされたもので、リ
ング部材を利用することによつて、アウタギヤの
回転バランスが良好となり、回転トルクを低減す
ることができるトロコイドポンプを提供すること
を目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a trochoid pump that uses a ring member to improve the rotational balance of the outer gear and reduce rotational torque.
（課題を解決するための手段）
本考案は、上述した如きトロコイドポンプにお
いて、アウタギヤの外側又はインナギヤの内側の
少なくとも一方にリング部材が設けられ、該リン
グ部材の上記ギヤに面する周面が多円弧状となつ
ており、上記リング部材の周面とアウタギヤの外
周面との間又は上記リング部材の周面とインナギ
ヤの内周面との間のうち少なくとも一方にオイル
溜め部が形成され、さらに、上記アウタギヤの側
面に各内歯の底部とアウタギヤの外周部とを連通
する閉じ込み圧リーク用のロータ溝が半径方向に
放射状に形成され、該ロータ溝が回転方向に向つ
て徐々に深くなる傾斜面を有する構成とする。(Means for Solving the Problems) The present invention provides a trochoid pump as described above, in which a ring member is provided on at least one of the outside of the outer gear or the inside of the inner gear, and the ring member has a plurality of peripheral surfaces facing the gear. It has an arc shape, and an oil reservoir is formed between at least one of the circumferential surface of the ring member and the outer circumferential surface of the outer gear or between the circumferential surface of the ring member and the inner circumferential surface of the inner gear, and further , a rotor groove for confinement pressure leakage is formed in a radial direction on the side surface of the outer gear to communicate the bottom of each internal tooth and the outer circumference of the outer gear, and the rotor groove gradually becomes deeper in the rotation direction. The structure has an inclined surface.
（作用）
オイル溜り部に溜るオイルが、アウタギヤ又は
インナギヤの回転により、動圧を発生し、上記ギ
ヤの回転バランスが良くなる。(Function) The oil accumulated in the oil reservoir generates dynamic pressure due to the rotation of the outer gear or the inner gear, and the rotational balance of the gears is improved.
また、アウタギヤの側面に、半径方向に放射状
に形成された閉じ込み圧リーク用のロータ溝が、
回転方向に向つて徐々に深くなる傾斜面を有して
いるので、動力を発生させ、回転トルクの低減に
寄与する。 In addition, rotor grooves for confinement pressure leaks are formed radially on the side of the outer gear.
Since it has an inclined surface that gradually becomes deeper in the direction of rotation, it generates power and contributes to reducing rotational torque.
（実施例）
以下、本考案の実施例を図面に沿つて説明す
る。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図及び第２図に示すように、トロコイドポ
ンプ１のハウジング２の中央部に形成された円筒
状空間部３内には、トロコイド包絡線によつて形
成される歯形をした10個の外歯４を備え、偏心軸
５によつて回転駆動されるインナギヤ６と、上記
外歯４と係合する11個の内歯７を備えるととも
に、外周部を空間部３の内周壁に摺接させつつイ
ンナギヤ６の回転に伴つて、同方向に回転させら
れるアウタギヤ８とが設けられている。そして、
インナギヤ６の各外歯４の歯先部は、夫々、常に
アウタギヤ８の内歯７のいずれかと摺接し、これ
によつて、外歯４と内歯８とハウジング２の空間
部３の側壁とポンプカバー９の内側面とによつ
て、互いに連通しない10個の油室１１が形成され
ている。これらの油室１１は、夫々、インナギヤ
６の回転に伴つて偏心軸まわりに回転し、吸入ポ
ート１２と連通する位置にあるときに回転に伴つ
てその容積を増加させつつ吸入ポート１２を介し
てオイル吸入通路１３からオイルを吸入し、吸入
ポート１２のリーデイング側端部通過時には容積
が最大となりオイルを閉じ込め、この後、吐出ポ
ート１４と連通する位置にきたときに回転に伴つ
てその容積を減少させつつ吐出ポート１４を介し
てオイル吐出通路１５へオイルを吐出する一連の
行程が連続的に繰り返され、オイルを所定の吐出
圧（例えば、20Kg／cm2）で所定の装置に供給する
ような基本構成となつている。尚、オイルはオイ
ルタンク（図示していない）から吸入口１６を介
してトロコイドポンプに導入され、一方、吐出口
１７を介してトロコイドポンプから所定の装置に
供給されるようになつている。 As shown in FIGS. 1 and 2, in the cylindrical space 3 formed in the center of the housing 2 of the trochoid pump 1, there are 10 outer teeth shaped like teeth formed by the trochoid envelope. It is provided with an inner gear 6 having teeth 4 and rotationally driven by an eccentric shaft 5, and eleven internal teeth 7 that engage with the external teeth 4, and whose outer peripheral portion is in sliding contact with the inner peripheral wall of the space 3. At the same time, an outer gear 8 is provided which is rotated in the same direction as the inner gear 6 rotates. and,
The tooth tip of each external tooth 4 of the inner gear 6 is always in sliding contact with one of the internal teeth 7 of the outer gear 8, so that the external tooth 4, the internal tooth 8, and the side wall of the space 3 of the housing 2 Ten oil chambers 11 which do not communicate with each other are formed by the inner surface of the pump cover 9. Each of these oil chambers 11 rotates around an eccentric axis with the rotation of the inner gear 6, and when in a position communicating with the suction port 12, increases its volume as it rotates, and is connected to the suction port 12 through the suction port 12. Oil is sucked in from the oil suction passage 13, and when it passes through the leading end of the suction port 12, its volume reaches its maximum, trapping the oil, and then, when it reaches a position where it communicates with the discharge port 14, its volume decreases as it rotates. A series of strokes in which oil is discharged into the oil discharge passage 15 through the discharge port 14 are continuously repeated, and the oil is supplied to a predetermined device at a predetermined discharge pressure (for example, 20 kg/cm 2 ). This is the basic configuration. Note that oil is introduced into the trochoid pump from an oil tank (not shown) through an inlet 16, and is supplied from the trochoid pump to a predetermined device through an outlet 17.
また、ハウジング２とアウタギヤ８との間及び
インナギヤ６とハウジング２の中央ボス部２ａと
の間には、それぞれ、リング部材としてのアウタ
スリーブ１８及びインナスリーブ１９が介設され
ている。 Furthermore, an outer sleeve 18 and an inner sleeve 19 as ring members are interposed between the housing 2 and the outer gear 8 and between the inner gear 6 and the central boss portion 2a of the housing 2, respectively.
アウタギヤ８に面するアウタスリーブ１８は、
外周を真円に削つたスリーブを３点チエツクにて
固定され、内周面が研削加工されてなる。アウタ
スリーブ１８は肉厚が異なり、その内周面１８ａ
は対称な多円弧状となつており、アウタスリーブ
１８がハウジング２に嵌着された状態で、第３図
に示すように、アウタスリーブ１８の内周面１８
ａとアウタギヤ８の外周面８ａとの間に複数のオ
イル溜り部２０が対称に形成されるようになつて
いる。 The outer sleeve 18 facing the outer gear 8 is
A sleeve whose outer circumference has been ground into a perfect circle is fixed with a three-point check, and the inner circumference is ground. The outer sleeve 18 has different wall thicknesses, and its inner peripheral surface 18a
has a symmetrical multi-arc shape, and when the outer sleeve 18 is fitted into the housing 2, as shown in FIG.
A plurality of oil reservoirs 20 are symmetrically formed between the outer peripheral surface 8a of the outer gear 8 and the outer peripheral surface 8a of the outer gear 8.
このオイル溜り部２０では、アウタギヤ８との
最大間隔が60〜70μ程度となつており、オイル溜
り部２０以外の部位では、アウタギヤ８との間隔
は30μ程度である。 The maximum distance between the oil reservoir 20 and the outer gear 8 is about 60 to 70μ, and the distance between the oil reservoir 20 and the outer gear 8 is about 30μ at other parts.
また、インナギヤ６に面するインナスリーブ１
９も同様に加工されて、対称な多円弧状となつて
おり、インナスリーブ１９がハウジング２の中央
ボス部２ａに嵌着された状態で、第４図に示すよ
うに、外周面１９ｂに内周面１９ａの対称な多円
弧状が転移するようになつている。これによつ
て、インナスリーブ１９の外周面１９ｂとインナ
ギヤ６の内周面に嵌着された軸受メタル２１との
間にも複数のオイル溜り部２２が対称に形成され
る。 In addition, the inner sleeve 1 facing the inner gear 6
9 is similarly processed and has a symmetrical multi-arc shape, and as shown in FIG. The symmetrical multi-arc shape of the circumferential surface 19a is adapted to shift. As a result, a plurality of oil reservoirs 22 are also symmetrically formed between the outer circumferential surface 19b of the inner sleeve 19 and the bearing metal 21 fitted to the inner circumferential surface of the inner gear 6.
また、アウタギヤ８の両側面には、各内歯の底
部とアウタギヤ８の外周部とを連通する閉じ込み
圧リーク用のロータ溝２３が、半径方向に放射状
に形成されている。このロータ溝２３は、第５図
に示すように、回転方向Ａに向かつて徐々に深く
なる傾斜面２３ａを有しており、動力を発生させ
て、回転トルクの低減にも寄与するようになつて
いる。 Further, on both side surfaces of the outer gear 8, rotor grooves 23 for confinement pressure leakage, which communicate the bottom of each internal tooth and the outer circumference of the outer gear 8, are formed radially in the radial direction. As shown in FIG. 5, this rotor groove 23 has an inclined surface 23a that gradually becomes deeper in the rotation direction A, and generates power and also contributes to reducing rotational torque. ing.
上記のように構成すれば、偏心軸５によつてイ
ンナギヤ６が回転すると、インナギヤ６とインナ
スリーブ１９との間のオイル溜り部２１のオイル
に、第４図に示すように動圧P2が発生し、イン
ナギヤ６の内周面（軸受メタル２１）に対し半径
方向外方に付勢する一様圧力が作用する。 With the above configuration, when the inner gear 6 is rotated by the eccentric shaft 5, a dynamic pressure P2 is applied to the oil in the oil reservoir 21 between the inner gear 6 and the inner sleeve 19, as shown in FIG. A uniform pressure is generated, which urges the inner circumferential surface (bearing metal 21) of the inner gear 6 radially outward.
また、インナギヤ６の回転によりそれと噛合す
るアウタギヤ８が、両ギヤ６，８の間のポンプ室
に吸入ポート１２よりオイルが吸入され、吐出ポ
ート１４より吐出される。 Further, as the inner gear 6 rotates, the outer gear 8 meshes with the inner gear 6. Oil is sucked into the pump chamber between the two gears 6 and 8 through the suction port 12, and is discharged through the discharge port 14.
このポンプ作用によつて、ハウジング２とアウ
タギヤ８との間に持ち込まれたオイル溜り部２０
のオイルが、アウタギヤ８の回転により、第３図
に示すように、動圧P1を発生し、アウタギヤ８
の外周面８ａに対し半径方向内方に付勢する一様
圧力が作用する。 Due to this pumping action, an oil reservoir 20 is brought between the housing 2 and the outer gear 8.
Due to the rotation of the outer gear 8, the oil generates a dynamic pressure P1 as shown in FIG.
A uniform pressure that urges radially inward acts on the outer circumferential surface 8a of.
このように、両ギヤ６，８の回転により発生し
た動圧によつて、インナギヤ６、アウタギヤ８の
回転バランスが保たれ、回転トルクが低くなる。 In this way, the rotational balance of the inner gear 6 and outer gear 8 is maintained by the dynamic pressure generated by the rotation of both gears 6 and 8, and the rotational torque is reduced.
それに加えて、アウタギヤ８の両側面に、半径
方向に放射状に閉じ込み圧リーク用のロータ溝２
３が形成され、該ロータ溝２３が回転方向に向つ
て徐々に深くなる傾斜面を有しているので、動力
を発生させ、この点においても回転トルクの低減
に寄与する。 In addition, rotor grooves 2 are provided on both sides of the outer gear 8 for confinement and pressure leakage in a radial direction.
3 is formed, and the rotor groove 23 has an inclined surface that gradually becomes deeper in the direction of rotation, thereby generating power and contributing to the reduction of rotational torque in this respect as well.
（考案の効果）
本考案は、上記のように、リング部材を利用し
てオイル溜り部を形成することで、オイル溜り部
に動圧が確実に発生するようにしたから、ギヤの
回転バランスが良くなり、回転トルクを低減する
ことができる。特に、アウタギヤの側面に、回転
方向に向つて徐々に深くなる傾斜面を有する閉じ
込み圧リーク用のロータ溝を半径方向に放射状に
形成しているので、動力を発生させることとな
り、回転トルクの低減に寄与する。(Effects of the invention) As described above, the present invention uses a ring member to form an oil reservoir to ensure that dynamic pressure is generated in the oil reservoir, thereby improving the rotational balance of the gear. The rotational torque can be reduced. In particular, rotor grooves for confinement pressure leaks are formed radially in the side surface of the outer gear, which have sloped surfaces that gradually become deeper in the direction of rotation, which generates power and reduces rotational torque. Contribute to reduction.
図面は本考案の実施例を示すもので、第１図は
トロコイドポンプの正面図、第２図は同縦断面
図、第３図及び第４図はそれぞれインナギヤ及び
アウタギヤと発生する動圧との関係を示す図、第
５図はロータ溝の断面図である。
１……ポンプ、２……ハウジング、６……イン
ナギヤ、８……アウタギヤ、１８……アウタスリ
ーブ、１９……インナスリーブ、２０，２１……
オイル溜り部、２３……ロータ溝。
The drawings show an embodiment of the present invention. Fig. 1 is a front view of the trochoid pump, Fig. 2 is a longitudinal sectional view thereof, and Figs. 3 and 4 are diagrams showing the relationship between the inner gear, the outer gear, and the dynamic pressure generated. A diagram showing the relationship, FIG. 5 is a sectional view of the rotor groove. 1... Pump, 2... Housing, 6... Inner gear, 8... Outer gear, 18... Outer sleeve, 19... Inner sleeve, 20, 21...
Oil reservoir section, 23...Rotor groove.
Claims (1)
油室を画成する外歯を有するインナギヤとを備え
たトロコイドポンプにおいて、 上記アウタギヤの外側又はインナギヤの内側の
少なくとも一方にリング部材が設けられ、該リン
グ部材の上記ギヤに面する周面が多円弧状となつ
ており、上記リング部材の周面とアウタギヤの外
周面との間又は上記リング部材の周面とインナギ
ヤの内周面との間のうち少なくとも一方にオイル
溜め部が形成され、さらに、上記アウタギヤの側
面に各内歯の底部とアウタギヤの外周部とを連通
する閉じ込み圧リーク用のロータ溝が半径方向に
放射状に形成され、該ロータ溝が回転方向に向つ
て徐々に深くなる傾斜面を有することを特徴とす
るトロコイドポンプ。[Claims for Utility Model Registration] A trochoid pump comprising an outer gear with internal teeth and an inner gear with external teeth that engages with the internal teeth to define an oil chamber, the outside of the outer gear or the inside of the inner gear. A ring member is provided on at least one of the ring members, and the peripheral surface of the ring member facing the gear is in the shape of a multi-circular arc, and the peripheral surface of the ring member is located between the peripheral surface of the ring member and the outer peripheral surface of the outer gear, or between the peripheral surface of the ring member and the outer peripheral surface of the outer gear. An oil reservoir is formed at least on one side between the surface and the inner circumferential surface of the inner gear, and the rotor for confinement pressure leakage communicates between the bottom of each internal tooth and the outer circumference of the outer gear on the side surface of the outer gear. A trochoid pump characterized in that the groove is formed radially in the radial direction, and the rotor groove has an inclined surface that gradually becomes deeper in the rotation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987134307U JPH0537028Y2 (en) | 1987-09-02 | 1987-09-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987134307U JPH0537028Y2 (en) | 1987-09-02 | 1987-09-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6439488U JPS6439488U (en) | 1989-03-09 |
| JPH0537028Y2 true JPH0537028Y2 (en) | 1993-09-20 |
Family
ID=31392946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987134307U Expired - Lifetime JPH0537028Y2 (en) | 1987-09-02 | 1987-09-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0537028Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5631055B2 (en) * | 2010-05-13 | 2014-11-26 | ダイハツ工業株式会社 | Oil pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132416A (en) * | 1979-04-03 | 1980-10-15 | Ntn Toyo Bearing Co Ltd | Fluid journal bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61171885U (en) * | 1985-04-15 | 1986-10-25 |
-
1987
- 1987-09-02 JP JP1987134307U patent/JPH0537028Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132416A (en) * | 1979-04-03 | 1980-10-15 | Ntn Toyo Bearing Co Ltd | Fluid journal bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6439488U (en) | 1989-03-09 |
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