JPH04125689U

JPH04125689U - multilayer gear pump

Info

Publication number: JPH04125689U
Application number: JP4135791U
Authority: JP
Inventors: 政則近藤
Original assignee: 三菱重工業株式会社
Priority date: 1991-05-08
Filing date: 1991-05-08
Publication date: 1992-11-16

Abstract

(57)【要約】【目的】吐出液の脈動が少なく信頼性が高い構造簡単
かつ価格低廉な多層ギアポンプを提供する。【構成】平歯車を用いた多層ギア式ポンプにおいて、
一層目の歯車５から順に最終層（Ｎ番目）の歯車３まで
層ごとに吐出タイミングがずれるように歯車の位相を互
いにずらしたことを特徴とする多層ギアポンプ。 (57) [Summary] [Purpose] To provide a multilayer gear pump with a simple structure and low price, which has little pulsation in discharged liquid and is highly reliable. [Configuration] In a multi-layer gear pump using spur gears,
A multilayer gear pump characterized in that the phases of the gears are shifted from each other so that the discharge timing is shifted for each layer from gear 5 in the first layer to gear 3 in the final layer (Nth).

Description

【考案の詳細な説明】[Detailed explanation of the idea]

【０００１】0001

【産業上の利用分野】[Industrial application field]

本考案は多層ギアポンプに関する。 The present invention relates to a multilayer gear pump.

【０００２】0002

【従来の技術】[Conventional technology]

例えば、２層ギア式オイルポンプにおいては、図３縦断面図及び図４横断面図に示すように、１はオイルポンプ駆動軸、２は第１層の駆動側ギア、３は第２層の駆動側ギア、４はオイルポンプ被駆動軸、５は第１層の被駆動側ギア、６は第２層の被駆動側ギア、７は第１層と第２層間の仕切り板である。このような構造において、駆動側ギア２，３はそれぞれオイルポンプ駆動軸１に圧入又はキー等により同一の位相にて強固に固定され、同様に被駆動側ギア５，６はオイルポンプ被駆動軸４に同一の位相にて強固に固定又は自由に保持されており、オイルポンプ作動中は第１層側ギアと第２層側ギアが同一タイミングで吸入及び吐出を行うのである。 For example, in a two-layer gear type oil pump, Fig. 3 longitudinal sectional view and Fig. 4 lateral sectional view As shown, 1 is the oil pump drive shaft, 2 is the drive side gear of the first layer, and 3 is the second layer 4 is the oil pump driven shaft, 5 is the first layer driven gear, and 6 is the 1st layer driven gear. There are two layers of driven gears, and 7 is a partition plate between the first layer and the second layer. In such a structure, the drive side gears 2 and 3 are each connected to the oil pump drive shaft 1. The driven gear 5 is firmly fixed in the same phase with a press fit or key etc. , 6 are firmly fixed to the oil pump driven shaft 4 in the same phase or are freely held. When the oil pump is operating, the 1st layer side gear and the 2nd layer side gear operate at the same timing. It inhales and exhales.

【０００３】0003

【考案が解決しようとする課題】[Problem that the idea aims to solve]

しかしながら、このような２層ギアポンプにおいては下記のような問題がある。 (1) １層目と２層目の吐出タイミングが同時であるため、油圧脈動が大きくなる。 (2) 多層化することによって吐出容量を大きくすると、油圧装置に強度及び振動面での脈動面での脈動対策を施す必要が生じ、装置が複雑になると共にコスト高となる。 (3) 油圧装置の圧力制御弁等に不整作動を生じやすい。 (4) 油圧配管類の信頼性が低下する。本考案はこのような事情に鑑みて提案されたもので、吐出液の脈動が少なく信頼性が高い構造簡単かつ価格低廉な多層ギアポンプを提供することを目的とする。 However, such two-layer gear pumps have the following problems. . (1) Because the discharge timing of the first and second layers is the same, the hydraulic pulsation is large. Ru. (2) Increasing the discharge capacity by layering increases the strength and vibration of the hydraulic system. It becomes necessary to take measures against pulsation on the pulsation surface, which increases the complexity of the equipment and the cost. Becomes high. (3) Irregular operation is likely to occur in pressure control valves, etc. of hydraulic equipment. (4) Reliability of hydraulic piping decreases. This invention was proposed in view of these circumstances, and it is reliable because there is less pulsation in the discharged liquid. The purpose is to provide a multi-layer gear pump that is highly reliable, has a simple structure, and is inexpensive. .

【０００４】0004

【課題を解決するための手段】[Means to solve the problem]

そのために本考案は、平歯車を用いた多層ギア式ポンプにおいて、一層目の歯車から順に最終層（Ｎ番目）まで層ごとに、吐出タイミングがずれるように歯車の位相を互いにずらしたことを特徴とする。 To this end, the present invention has developed a multi-layer gear pump using spur gears. The gears are adjusted so that the discharge timing is shifted for each layer from the car to the final layer (Nth). It is characterized in that the phases of the two are shifted from each other.

【０００５】[0005]

【作用】[Effect]

このような構成によれば、ポンプ作動中は各層の吐出圧力のピークが重ならないように吐出されるので、脈動がならされて脈動幅が減少し安定した吐出液圧が確保できる。 With this configuration, the peaks of the discharge pressures of each layer do not overlap during pump operation. Since the liquid is discharged at a constant rate, the pulsation is smoothed out, the width of the pulsation is reduced, and stable discharge pressure is maintained. Can be secured.

【０００６】[0006]

【実施例】【Example】

本考案の一実施例を図面について説明すると、図１はその縦断面図、図２は図１のII−IIに沿った横断面図である。上図において、図３〜図４と同一の符号はそれぞれ同図と同一の部材を示し、本考案構造が図３〜図４のそれと異なるところは第１層のギアと第２層のギアの位相を互いにずらせたことにある。すなわち、図２に破線で示すように、第２層の駆動側ギア３ａは第１層の駆動側ギア２に対してその位相がピッチ／２だけ進んでおり、その結果、吐出圧のピークのタイミングが第１層のピークとピークの間に入り、吐出圧が安定化する。 One embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a diagram. FIG. 1 is a cross-sectional view taken along II-II of FIG. In the above figure, the same reference numerals as in FIGS. 3 to 4 indicate the same members as in the same figure, respectively. The difference between the structure of the present invention and that shown in Figs. 3 and 4 is that the first layer gear and the second layer gear are This is because the phases are shifted from each other. That is, as shown by the broken line in FIG. 2, the second layer drive side gear 3a is the first layer drive gear. Its phase is ahead of side gear 2 by pitch/2, and as a result, the discharge pressure peak The timing of the peak falls between the peaks of the first layer, and the discharge pressure becomes stable.

【０００７】[0007]

【考案の効果】[Effect of the idea]

このような構造によれば、下記の効果が奏せられる。 (1) 吐出タイミングがずれることにより油圧脈動が小さくなり、安定した油圧が得られる。 (2) 多層にすることにより大容量化が容易に可能となり、油圧装置は強度及び振動面での脈動対策が不要となって低コストで構成できる。 (3) 油圧装置の圧力制御弁等の不整作動が防止できる。 (4) 油圧配管類の信頼性が向上する。要するに本考案によれば、平歯車を用いた多層ギア式ポンプにおいて、一層目の歯車から順に最終層（Ｎ番目）まで層ごとに、吐出タイミングがずれるように歯車の位相を互いにずらしたことにより、吐出液の脈動が少なく信頼性が高い構造簡単かつ価格低廉な多層ギアポンプを得るから、本考案は産業上極めて有益なものである。 According to such a structure, the following effects can be achieved. (1) Hydraulic pressure pulsation is reduced by shifting the discharge timing, resulting in stable oil pressure. is obtained. (2) By using multiple layers, it is easy to increase the capacity, and the hydraulic system has improved strength and Since there is no need to take measures against pulsation on the vibration side, it can be configured at low cost. (3) Irregular operation of pressure control valves, etc. of hydraulic equipment can be prevented. (4) The reliability of hydraulic piping is improved. In short, according to the present invention, in a multi-layer gear pump using spur gears, the first layer The discharge timing is shifted for each layer from the gear to the final layer (Nth). By shifting the phases of the gears, the pulsation of the discharged liquid is reduced and the structure is highly reliable. This invention is extremely useful industrially because it provides a multilayer gear pump that is easy to manufacture and inexpensive. It is something.

【図面の簡単な説明】[Brief explanation of the drawing]

【図１】本考案の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

【図２】図１のII−IIに沿った横断面図である。FIG. 2 is a cross-sectional view taken along II-II in FIG. 1;

【図３】公知の２層ギア式オイルポンプを示す縦断面図
である。FIG. 3 is a longitudinal sectional view showing a known two-layer gear oil pump.

【図４】図３のIII −III に沿った横断面図である。FIG. 4 is a cross-sectional view taken along III-III in FIG. 3;

【符号の説明】[Explanation of symbols]

１駆動軸２第１層の駆動側ギア３ａ第２層の駆動側ギア４被駆動軸５第１層の被駆動側ギア６ａ第２層の被駆動側ギア７仕切板 1 Drive shaft 2 First layer drive side gear 3a 2nd layer drive side gear 4 Driven shaft 5 First layer driven gear 6a Second layer driven gear 7 Partition plate

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

【請求項１】平歯車を用いた多層ギア式ポンプにおい
て、一層目の歯車から順に最終層（Ｎ番目）まで層ごと
に、吐出タイミングがずれるように歯車の位相を互いに
ずらしたことを特徴とする多層ギアポンプ。[Claim 1] A multi-layer gear type pump using spur gears, characterized in that the phases of the gears are shifted from each other so that the discharge timing is shifted for each layer from the first gear to the final layer (Nth). multi-layer gear pump.