JPH01219375A - Plastic oil pump - Google Patents
Plastic oil pumpInfo
- Publication number
- JPH01219375A JPH01219375A JP4664088A JP4664088A JPH01219375A JP H01219375 A JPH01219375 A JP H01219375A JP 4664088 A JP4664088 A JP 4664088A JP 4664088 A JP4664088 A JP 4664088A JP H01219375 A JPH01219375 A JP H01219375A
- Authority
- JP
- Japan
- Prior art keywords
- case
- outer rotor
- oil pump
- rotor
- circumference
- 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.)
- Granted
Links
- 239000004033 plastic Substances 0.000 title claims description 12
- 229920003023 plastic Polymers 0.000 title claims description 12
- 239000002184 metal Substances 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 239000010720 hydraulic oil Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は自動車、建設機械、工作機械などに使用する
低圧オイルポンプに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a low-pressure oil pump used in automobiles, construction machinery, machine tools, etc.
（従来の技術）
自動車用オイルポンプにおいては従来内接ギヤーポンプ
Φロータに関しては公開実用新案公報昭６２−１２７８
５に示されているように摺動部の良いプラスチックで製
作するというのがあるがポンプケースまでプラスチック
化したものはまだない。(Prior art) Regarding automobile oil pumps, conventional internal gear pump Φ rotor is disclosed in Utility Model Publication No. 1278/1986.
As shown in Figure 5, there are some pumps that are made of plastic with good sliding parts, but there is no one that has even the pump case made of plastic.
（発明が解決しようとする課題）
歯車形オイルポンプ（トロコイド形を含む）のポンプケ
ースおよびロータをともにプラスチック化する場合、ロ
ータとケースの摺動面の周速が通常１０ｎ／ｓ〜３０ｍ
／ｓと非常に早いため潤滑作用が十分に行なわれずプラ
スチック同士の摺動では耐摩耗性が悪（、熱伝導率も低
いため摺動部が発熱し溶着してしまう。(Problem to be solved by the invention) When both the pump case and rotor of a gear type oil pump (including trochoid type) are made of plastic, the peripheral speed of the sliding surfaces of the rotor and case is usually 10 n/s to 30 m.
/s, so the lubricating action is not sufficient and the wear resistance is poor when plastics slide against each other (and the thermal conductivity is low, so the sliding parts generate heat and weld together).
ロータ外周にリング状の金属インサートを用いる案もあ
るがインサートの寸法精度やプラスチックとの熱膨張率
の差の簡題がある。There is also a plan to use a ring-shaped metal insert around the rotor, but there are issues with the dimensional accuracy of the insert and the difference in thermal expansion coefficient with plastic.
（課題を解決するための手段及び作用）この発明は上記
課題に鑑みなされたものであって、内接ギヤーポンプの
場合はアウタロータの外周とケースとの摺動部の間に片
側端部をケースに固定した複数の金属ベルトを挿入し、
プラスチック同士の摺動を避けてかっ摺動によって発生
する熱を金属ベルトによって冷却するものである。(Means and effects for solving the problem) This invention has been made in view of the above problems, and in the case of an internal gear pump, one end is attached to the case between the outer periphery of the outer rotor and the sliding part of the case. Insert multiple fixed metal belts,
This system avoids sliding between plastics and uses a metal belt to cool the heat generated by sliding.
また複数の金属ベルトはフリーの状態のリング状にする
ことによっても同じ目的が達せられる。The same objective can also be achieved by forming a plurality of metal belts into a ring shape in a free state.
さらに外接ギヤポンプの場合は同様に複数のベルトを各
ギヤーの外周（歯先部分）とケースとの間に挿入するこ
とによって同じ目的が達せられる。Furthermore, in the case of an external gear pump, the same purpose can be achieved by similarly inserting a plurality of belts between the outer periphery (tooth tips) of each gear and the case.
（実施例） つぎにこの発明の実施例を図面に基づいて説明する。(Example) Next, embodiments of the present invention will be described based on the drawings.
第１図、第２図は第１の実施例で第１図は第２図のケー
ス（ふた）ｌｂを外してＡ−Ａの矢印の方向に見た図で
ある。また第２図は第１図のＢ−Ｂ断面である。1 and 2 show the first embodiment, and FIG. 1 is a view of FIG. 2 with the case (lid) lb removed and viewed in the direction of the arrow A-A. Further, FIG. 2 is a cross section taken along the line BB in FIG. 1.
第１図に於いてケース１ａの内側にはアウタロータ２が
あり、さらにアウタロータ２の内側にはインナロータ３
がアウタロータ２の中心とは偏心した軸１０に固着され
ている。アウタロータ２の内側に設けられた歯とインナ
ロータ３の外周に設けられた歯とは図示のごとく噛み合
い、インナロータ３０軸１０を矢印Ｃの方向に回転させ
ることによりアウタロータ２を回転させる。In FIG. 1, there is an outer rotor 2 inside the case 1a, and an inner rotor 3 inside the outer rotor 2.
is fixed to a shaft 10 eccentric from the center of the outer rotor 2. The teeth provided on the inside of the outer rotor 2 and the teeth provided on the outer periphery of the inner rotor 3 mesh as shown, and by rotating the shaft 10 of the inner rotor 30 in the direction of arrow C, the outer rotor 2 is rotated.
また１７は作動油の入口、６は入口１７と連通した室で
両ロータに両側でケース１ａのおよびケース（ふた）ｌ
ｂに設けられたみぞ１５とも連通している。同様に作動
油の吐出口１８は室７（第２図では７ａ、７ｂと表示）
と連通。Further, 17 is an inlet for hydraulic oil, and 6 is a chamber communicating with the inlet 17, which is connected to both rotors on both sides by case 1a and case (lid l).
It also communicates with the groove 15 provided in b. Similarly, the hydraulic oil discharge port 18 is located in the chamber 7 (indicated as 7a and 7b in Fig. 2).
Communicate with.
さらにケース１ａおよびケース（ふた）ｌｂに設けられ
たみぞ１６（第２図では１６ａ、１６ｂと表示）と連通
している。Furthermore, it communicates with grooves 16 (indicated as 16a and 16b in FIG. 2) provided in the case 1a and the case (lid) lb.
作動油は軸１０をＣ方向に同軸することによりインナロ
ータ３が回転し、従ってアウタロータ２が回転すること
により入口１７から矢印り方向に吸い込まれインナロー
タ３とアウタロータ２の作る空間１４ａが回転と共に１
４ｂへとその空間を広げながら作動油をみぞ１５から吸
込んでゆき１４ｃからはこの空間が縮少して１４ｄの如
くなるので作動油はみぞ１６（第２図では１６ ａ、
１６ ｂ）へ押し出し、押し出された作動油は室７（
第２図では７ａ、７ｂ）を通り吐出口１８を通って矢印
Ｃ方向へ吐出される。By coaxially aligning the shaft 10 in the C direction, the inner rotor 3 rotates, and as the outer rotor 2 rotates, hydraulic oil is sucked in from the inlet 17 in the direction of the arrow, and the space 14a created by the inner rotor 3 and the outer rotor 2 becomes 1 with rotation.
As the space expands to 4b, hydraulic oil is sucked in from groove 15, and from 14c this space shrinks to become 14d, so the hydraulic oil is sucked into groove 16 (16a in Fig. 2).
16 b), and the pushed-out hydraulic oil flows into chamber 7 (
7a, 7b) in FIG. 2, and is discharged in the direction of arrow C through the discharge port 18.
通常ケース１ａとアウタロータ２の外周との隙間１３は
０．１〜０．２閣程度あるので、この隙間１３に厚さ０
．０５ないし０．０７論の金属ベル）８ａ、８ｂ、８ｃ
、８ｄのようにその一端をケースｌａに固定し、他端を
フリーの状態で装着する。この金属ベルトによりケース
１ａの内側とアウタロータ２の外周とは直接接触するこ
とな（、アウタロータ２の外周は金属ベルトに摺接しな
がら回転するので摩耗は少な（、また摺動によって生ず
る熱も金属ベルトの伝熱により冷却されるので溶着の恐
れはない。Normally, the gap 13 between the case 1a and the outer periphery of the outer rotor 2 is about 0.1 to 0.2 mm, so this gap 13 has a thickness of 0.
．． 05 to 0.07 metal bell) 8a, 8b, 8c
, 8d, one end thereof is fixed to the case la, and the other end is attached in a free state. This metal belt prevents direct contact between the inside of the case 1a and the outer periphery of the outer rotor 2 (the outer periphery of the outer rotor 2 rotates while sliding on the metal belt, so there is little wear (and the heat generated by sliding is prevented from coming into contact with the metal belt). Since it is cooled by heat transfer, there is no risk of welding.
第３図は第２の実施例で金属ベルト９をエンドレスにア
ウタロータの外周に挿入したものである。FIG. 3 shows a second embodiment in which a metal belt 9 is endlessly inserted around the outer periphery of the outer rotor.
第４図は外接ギヤポンプに適用した第３の実施例である
。２１はケース、２２．２３は一対の歯車、３３ａ、３
３ｂはケース２１の内周と外接ギヤ２２．２３の外周と
の隙間で、この隙間に金属ベル）２８ａ、２８ｂをその
一端を固定して挿入したものである。３０ａ、３０ｂは
外接ギヤ２２．２３の軸で２２を矢印Ｈａの方向に回転
することにより２３はＨｂの方向に回転し１作動油は矢
印Ｆ方向に吸込まれ矢印Ｃ方向に吐出される。FIG. 4 shows a third embodiment applied to an external gear pump. 21 is a case, 22.23 is a pair of gears, 33a, 3
3b is a gap between the inner periphery of the case 21 and the outer periphery of the circumscribed gears 22 and 23, into which metal bells 28a and 28b are inserted with one end fixed. 30a and 30b are the shafts of external gears 22 and 23. By rotating 22 in the direction of arrow Ha, 23 rotates in the direction of Hb, and 1 hydraulic fluid is sucked in the direction of arrow F and discharged in the direction of arrow C.
（発明の効果）
この発明は上述したようにして成るので、従来の技術で
はプラスチック同士の接触で耐久性が乏しかったものが
、金属ベルトを挿入することによってプラスチック同士
の接触が回避でき。(Effects of the Invention) Since the present invention is constructed as described above, the conventional technology had poor durability due to contact between plastics, but by inserting a metal belt, contact between plastics can be avoided.
熱伝導性のよい金属ベルトで放熱が容易となるので、ケ
ースやロータがすべてプラスチック化できる。The metal belt, which has good thermal conductivity, facilitates heat dissipation, so the case and rotor can be made entirely of plastic.
従ってオイルポンプの軽量化および原価低減につながり
その効果は非常に大で実用価値は極めて高い。Therefore, the weight and cost of the oil pump can be reduced, and the effect is very large and the practical value is extremely high.
第１図、第２図はこの発明の第１の実施例で第１図は第
２図のＡ−Ａ矢視図、第２図は第１図のＢ−Ｂ断面図、
第３図は第２の実施例を示すもので第１図に準じたもの
、第４図は第３の実施例を示す図である。
１ａ・・・ケース ２・・・アウタロータ２２、２
３・・・外接ギヤ
８ａ、８ｂ、８ｃ、８ｄ、 ９．２８ａ、２８ｂ−金属
ベルト特許出願人 株式会社小松製作所
代理人 （弁理士）岡 １）和 喜
第１図
Ａに一一一一一
第２図
第３図
＝５１４−1 and 2 are a first embodiment of the present invention, and FIG. 1 is a view taken along the line A-A in FIG. 2, and FIG. 2 is a sectional view taken along line B-B in FIG.
FIG. 3 shows a second embodiment, which is similar to FIG. 1, and FIG. 4 shows a third embodiment. 1a...Case 2...Outer rotor 22, 2
3... External gears 8a, 8b, 8c, 8d, 9. 28a, 28b - Metal belt Patent applicant Komatsu Ltd. Representative (patent attorney) Oka 1) Kazuyuki Figure 1 A 11111 Figure 2 Figure 3 = 514-
Claims (1)
プにおいて、内接ギヤの場合はアウタロータ外周とケー
スとの間に、外接ギヤの場合は歯先とケースとの間に金
属ベルトを挿入したことを特徴としたプラスチック製オ
イルポンプ。In an oil pump consisting of a plastic case and gears, a metal belt is inserted between the outer rotor periphery and the case in the case of an internal gear, and between the tooth tip and the case in the case of an external gear. Plastic oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4664088A JP2602684B2 (en) | 1988-02-29 | 1988-02-29 | Plastic oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4664088A JP2602684B2 (en) | 1988-02-29 | 1988-02-29 | Plastic oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01219375A true JPH01219375A (en) | 1989-09-01 |
| JP2602684B2 JP2602684B2 (en) | 1997-04-23 |
Family
ID=12752902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4664088A Expired - Lifetime JP2602684B2 (en) | 1988-02-29 | 1988-02-29 | Plastic oil pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602684B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6974315B2 (en) * | 2003-02-18 | 2005-12-13 | Harley-Davidson Motor Company Group, Inc. | Reduced friction gerotor |
| JP2017141810A (en) * | 2015-12-17 | 2017-08-17 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Internal gear pump |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011083425A1 (en) * | 2011-09-26 | 2013-03-28 | Robert Bosch Gmbh | Internal gear pump |
-
1988
- 1988-02-29 JP JP4664088A patent/JP2602684B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6974315B2 (en) * | 2003-02-18 | 2005-12-13 | Harley-Davidson Motor Company Group, Inc. | Reduced friction gerotor |
| JP2017141810A (en) * | 2015-12-17 | 2017-08-17 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Internal gear pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2602684B2 (en) | 1997-04-23 |
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