JPH04105697U - oil pump - Google Patents
oil pumpInfo
- Publication number
- JPH04105697U JPH04105697U JP820391U JP820391U JPH04105697U JP H04105697 U JPH04105697 U JP H04105697U JP 820391 U JP820391 U JP 820391U JP 820391 U JP820391 U JP 820391U JP H04105697 U JPH04105697 U JP H04105697U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- seal
- drive shaft
- seal chamber
- pump casing
- 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
- 238000007790 scraping Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 abstract description 44
- 239000010687 lubricating oil Substances 0.000 abstract description 26
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
Abstract
(57)【要約】
【目的】 シール室内の潤滑油によるオイルシールの外
方への押圧力を低下させて、オイルシールの良好なシー
ル性能の維持と、不用意な脱落を防止する。
【構成】 ポンプケーシング1に有するシール室11内
のドレン孔12の一端開口部12aよりも駆動軸3の回
転方向前方位置に旋回している潤滑油を前記ドレン孔1
2内に強制的に案内するガイド部材14を設けると共
に、シール室11内にオイルシール9方向への潤滑油の
流動を阻止するダム部材13を設ける構成である。
(57) [Summary] [Purpose] To maintain good sealing performance of the oil seal and prevent it from accidentally falling off by reducing the outward pressing force of the oil seal due to the lubricating oil in the seal chamber. [Structure] The lubricating oil circulating in the rotational direction of the drive shaft 3 is transferred to a position forward of the opening 12a at one end of the drain hole 12 in the seal chamber 11 of the pump casing 1 in the drain hole 1.
In this configuration, a guide member 14 for forcibly guiding the lubricating oil is provided in the seal chamber 11, and a dam member 13 is provided in the seal chamber 11 to prevent the lubricating oil from flowing in the direction of the oil seal 9.
Description
【0001】0001
この考案は、内燃機関の各摺動部分へ潤滑油を圧送するオイルポンプの改良に 関する。 This idea was developed to improve the oil pump that pumps lubricating oil to each sliding part of an internal combustion engine. related.
【0002】0002
従来のこの種のオイルポンプとしては、例えば図7に示すような所謂内接ギア 型オイルポンプが知られている(実開昭63−126506号公報等参照)。 A conventional oil pump of this type uses a so-called internal gear as shown in Fig. 7, for example. Type oil pumps are known (see Japanese Utility Model Application Publication No. 126506/1983, etc.).
【0003】 概略を説明すれば、図中1は開口端がカバー2によって閉塞されたポンプケー シング、3は該ポンプケーシング1とカバー2の略中心部を貫通した駆動軸、4 ,5は前記ポンプケーシング1の円形状の作動室6内に回転自在に収納されたイ ンナーギアとアウターギアであって、このインナーギア4は、上記駆動軸3に連 結されていると共に、外周に前記リング状のアウターギア5の内歯と噛合する外 歯が形成されている。また、前記インナーギア4の一側にはインロー型のカラー 部7が形成されており、このカラー部7の周面7a及びスラスト方向の支持面7 bが前記ケーシング1の略中心部に形成した軸受部8の軸受面8aに所定のクリ アランスCを介して摺動自在に支持されている。図中9はポンプケーシング1の 一側部に有する環状部10の内周面10aと前記駆動軸3の外周面3aとの間に 配設された円環状のオイルシールであって、このオイルシール9の内側(左側) には、前記作動室6からクリアランスCを介して漏出した潤滑油を一旦溜める円 環状のシール室11が形成されている。また、12はケーシング1の下端内部に 略直径方向に沿って貫通形成されたドレン孔で、このドレン孔12は、前記シー ル室11内の潤滑油を一端開口部12aから導入して他端開口部12bより外部 (オイルパン内)に排出するように構成されている。0003 To explain the outline, 1 in the figure is a pump case whose opening end is closed by a cover 2. 3 is a drive shaft passing through substantially the center of the pump casing 1 and the cover 2; , 5 is an engine rotatably housed in the circular working chamber 6 of the pump casing 1. an inner gear and an outer gear, and the inner gear 4 is connected to the drive shaft 3. The ring-shaped outer gear 5 has an outer ring on its outer periphery that meshes with the inner teeth of the ring-shaped outer gear 5. teeth are formed. In addition, a spigot-type collar is provided on one side of the inner gear 4. A peripheral surface 7a of this collar portion 7 and a supporting surface 7 in the thrust direction are formed. A predetermined hole b is formed on the bearing surface 8a of the bearing portion 8 formed approximately at the center of the casing 1. It is slidably supported via balance C. 9 in the figure is pump casing 1. Between the inner circumferential surface 10a of the annular portion 10 on one side and the outer circumferential surface 3a of the drive shaft 3 This is an annular oil seal arranged inside the oil seal 9 (left side). is a circle for temporarily storing the lubricating oil leaked from the working chamber 6 through the clearance C. An annular seal chamber 11 is formed. Also, 12 is inside the lower end of the casing 1. This drain hole 12 is formed to penetrate approximately along the diameter direction. The lubricating oil in the oil chamber 11 is introduced from the opening 12a at one end and externally from the opening 12b at the other end. (inside the oil pan).
【0004】0004
ところで、前記インナーギア4とアウターギア5の回転に伴い作動室6から漏 れ、軸受部8を潤滑しつつクリアランスCを通った潤滑油は、ままそのシール室 11内に流入する共に、ここで駆動軸3の回転に伴い該回転方向へ同伴する形で 旋回する。したがって、特に駆動軸3が高速回転すると、潤滑油自身の慣性力な でに起因してドレン孔12の開口部12aを通過してしまう。このため、シール 室11からドレン孔12への潤滑油の流入が困難となり、その結果、シール室1 1全体の圧力が上昇し、オイルシール9全体に外方向へ強い押圧力が加わり、シ ール性能が低下して潤滑油の洩れや、場合によってはオイルシール9自体が外側 に抜け出てしまうといった問題がある。 By the way, as the inner gear 4 and outer gear 5 rotate, leakage occurs from the working chamber 6. The lubricating oil that passed through the clearance C while lubricating the bearing part 8 remains in the seal chamber. 11, and here, along with the rotation of the drive shaft 3, it is entrained in the direction of rotation. rotate. Therefore, especially when the drive shaft 3 rotates at high speed, the inertia of the lubricating oil itself Due to this, the water passes through the opening 12a of the drain hole 12. For this reason, the seal It becomes difficult for lubricating oil to flow from the chamber 11 to the drain hole 12, and as a result, the seal chamber 1 The pressure of the entire oil seal 9 increases, and a strong outward pressing force is applied to the entire oil seal 9, causing the oil seal to close. The oil seal performance may deteriorate, causing lubricating oil to leak, or in some cases, the oil seal 9 itself may be damaged on the outside. There is a problem that it can slip out.
【0005】[0005]
この考案は、前記従来の問題点に鑑みて案出されたもので、第1請求項に係る 考案は、とりわけシール室内のドレン孔の一端開口部よりも駆動軸の回転方向前 方位置に、ガイド部材を設けると共に、シール室内のドレン孔一端開口部とオイ ルシールとの間にダム部材を設けたことを特徴としている。 This invention was devised in view of the above-mentioned conventional problems, and it is based on the first claim. The idea is that the area is located in front of the opening at one end of the drain hole in the seal chamber in the direction of rotation of the drive shaft. A guide member is provided at the opposite position, and one end opening of the drain hole in the seal chamber and the oil It is characterized by the provision of a dam member between it and Lucille.
【0006】 第2請求項に係る考案は、とりわけインナーギア端部のドレン孔一端開口部よ りも駆動軸の回転方向後方位置に、先端部がシール室内に臨む掻集部材を設けた ことを特徴としている。[0006] The invention according to the second claim is particularly advantageous due to the opening of one end of the drain hole at the end of the inner gear. A scraping member with its tip facing into the seal chamber is installed at the rear of the drive shaft in the rotational direction. It is characterized by
【0007】[0007]
第1請求項の考案によれば、ポンプ作動中にポンプケーシング内部からポンプ ケーシングと駆動軸との間を通ってシール室内に流入した潤滑油は、駆動軸の回 転に伴って該回転方向へ旋回し始めるが、この旋回流がガイド部材に突き当たっ て旋回力が抑制されると共に、そのままガイド部材の側面でドレン孔内に速やか に案内され、シール室内の圧力の上昇が抑制される。また、シール室内に流入し た潤滑油は、ダム部材によってオイルシール方向への流動が阻止されるため、前 記ガイド部材の作用と相俟ってオイルシールに対する外方への押圧力が十分に低 下する。 According to the invention of the first claim, the pump can be removed from inside the pump casing during pump operation. The lubricating oil that has flowed into the seal chamber through between the casing and the drive shaft prevents the drive shaft from rotating. As it rotates, it begins to swirl in the direction of rotation, but this swirling flow hits the guide member. The turning force is suppressed, and the side surface of the guide member quickly flows into the drain hole. The increase in pressure inside the sealing chamber is suppressed. Also, it may flow into the seal chamber. The lubricating oil is prevented from flowing in the direction of the oil seal by the dam member, so it Together with the action of the guide member, the outward pressing force on the oil seal is sufficiently low. down.
【0008】 第2請求項の考案によれば、ポンプケーシング内からシール室方向へ流入しよ うとする潤滑油は、インナーギア端部に設けられた掻集部材によって強制的に掻 集されてそのままドレン孔内に速やかに案内される。したがって、シール室内へ の潤滑油の流入量が減少し、油圧の上昇が抑制される。[0008] According to the invention of the second claim, the flow from inside the pump casing toward the seal chamber. The lubricating oil is forcibly scraped off by a scraping member installed at the end of the inner gear. It is collected and immediately guided into the drain hole as it is. Therefore, into the seal chamber The inflow of lubricating oil is reduced, and the increase in oil pressure is suppressed.
【0009】[0009]
以下、この考案の各実施例を図面に基づいて詳述する。尚、前記従来と共通の 構成個所には同一符号を付して説明する。 Hereinafter, each embodiment of this invention will be described in detail based on the drawings. In addition, common to the above conventional Constituent parts will be described with the same reference numerals.
【0010】 図1〜図3は第1請求項の考案に対応する実施例を示し、図中1は開口端がポ ンプカバー2によって閉塞されたポンプケーシング、3は駆動軸、4はポンプケ ーシング1内の作動室6内に回転自在に収納され、かつ駆動軸2に連結されたイ ンナーギア、5は内歯がインナーギア4の外歯に噛合し、かつ軸心がインナーギ ア4の軸心と偏心したリング状のアウターギア、7はインナーギア4の一端部に 設けられて、前記ポンプケーシング1の軸受部8にクリアランスCを介して摺動 自在に支持されたカラー部、9は軸受部8の外端側に一体に有する環状部10の 段差大径状の内周面10aと駆動軸3の外周面3aとの間に配設された円環状の オイルシール、11は該オイルシール9の内側に形成されたシール室、12はポ ンプケーシング1内に形成されて、一端開口部12aが前記シール室11に、他 端開口部12bが外部(クランクケース内)に夫々臨設されたドレン孔である。0010 1 to 3 show an embodiment corresponding to the invention of the first claim. The pump casing is closed by the pump cover 2, 3 is the drive shaft, and 4 is the pump casing. An engine rotatably housed in the working chamber 6 in the housing 1 and connected to the drive shaft 2. The inner gear 5 has internal teeth that mesh with the external teeth of the inner gear 4, and whose axis is aligned with the inner gear. A ring-shaped outer gear eccentric to the axis of 4, 7 is at one end of inner gear 4 is provided and slides on the bearing part 8 of the pump casing 1 through a clearance C. A freely supported collar portion 9 is an annular portion 10 integrally formed on the outer end side of the bearing portion 8. An annular ring disposed between the stepped large-diameter inner circumferential surface 10a and the outer circumferential surface 3a of the drive shaft 3. An oil seal, 11 is a seal chamber formed inside the oil seal 9, and 12 is a port. An opening 12a is formed in the pump casing 1, and an opening 12a is connected to the seal chamber 11 at one end, and an opening 12a at one end is connected to the seal chamber 11. The end openings 12b are drain holes provided outside (inside the crankcase).
【0011】 そして、環状部10の内端面10aにダム部材13が固定されていると共に、 該ダム部材13の所定位置にガイド部材14が一体に設けられている。即ち、前 記ダム部材13は、図2A,Bにも示すようにオイルシール9の内端面を被うよ うな円環板状に形成され、中央に駆動軸3の挿通孔13aが形成されていると共 に、外周縁がオイルシール9内側の前記内周面10aの段差径部に圧入固定され て作動室6側の一側面13bがドレン孔12の一端開口部12aの外側孔縁に略 面して配置されている。[0011] A dam member 13 is fixed to the inner end surface 10a of the annular portion 10, and A guide member 14 is integrally provided at a predetermined position of the dam member 13. That is, before The dam member 13 is arranged to cover the inner end surface of the oil seal 9, as shown in FIGS. 2A and 2B. It is formed in the shape of an annular plate, and has an insertion hole 13a for the drive shaft 3 formed in the center. The outer peripheral edge is press-fitted and fixed to the stepped diameter portion of the inner peripheral surface 10a inside the oil seal 9. One side surface 13b on the working chamber 6 side is approximately at the outer hole edge of one end opening 12a of the drain hole 12. are placed facing each other.
【0012】 一方、ガイド部材14は、矩形板状に形成され、一側縁がダム部材13の上下 中心線上の最下端部に固定されて駆動軸3の軸方向に沿って設けられている。つ り、このガイド部材14は、ダム部材13の最下端部にシール室11を横断する 形で設けられて、ドレン孔12の一端開口部12aよりも駆動軸3の回転方向前 方位置に配置されており、先端部14aが駆動軸3の軸心に向かって垂直に指向 している。0012 On the other hand, the guide member 14 is formed into a rectangular plate shape, and one side edge is above and below the dam member 13. It is fixed to the lowermost end on the center line and provided along the axial direction of the drive shaft 3. Two This guide member 14 crosses the sealing chamber 11 at the lowermost end of the dam member 13. The drive shaft 3 is provided in a shape in front of the opening 12a at one end of the drain hole 12 in the rotational direction of the drive shaft 3. The tip 14a is oriented perpendicularly toward the axis of the drive shaft 3. are doing.
【0013】 したがって、この実施例によれば、ポンプ作動中に作動室6内からクリアラン スCを通ってシール室11内に流入した潤滑油は、図3に示すように駆動軸3の 図1中矢印方向の回転に伴い該回転方向へ旋回し始めるが、斯かる旋回した潤滑 油は、自身の慣性力などにより一部が一端開口部12aを乗り越えてガイド部材 14の一側面14bに衝突する。このため、ここで潤滑油の旋回力が規制され、 そのまま該一側面14bに沿って開口部12aからドレン孔12内に速やかに案 内されて図外のオイルパンへ戻される。したがって、シール室11内の油圧の上 昇が十分に抑制される。[0013] Therefore, according to this embodiment, a clear run is made from inside the working chamber 6 during pump operation. The lubricating oil that has flowed into the seal chamber 11 through the SC is transferred to the drive shaft 3 as shown in FIG. As it rotates in the direction of the arrow in Figure 1, it begins to rotate in the direction of rotation, but the lubrication Due to its own inertia, some of the oil crosses over the opening 12a at one end and reaches the guide member. collides with one side 14b of 14. Therefore, the turning force of the lubricating oil is regulated here, As it is, it is immediately guided into the drain hole 12 from the opening 12a along the one side 14b. It is then returned to the oil pan (not shown). Therefore, the oil pressure inside the seal chamber 11 rise is sufficiently suppressed.
【0014】 しかも、前述のようにシール室11内に流入した潤滑油は、ダム部材13によ ってオイルシール9方向への流入が効果的に阻止され、前記潤滑油の旋回流動は 図3に示すようにダム部材13の内側で行われるため、シール室11内の油圧に よるオイルシール9に対する外方への押圧力がダム部材13により確実に規制さ れる。したがって、前記ガイド部材14の作用と相俟ってオイルシール9に対す る外方への押圧力が十分に低下する。この結果、オイルシール9の良好なシール 性能が維持されると共に、オイルシール9の不用意な抜け出しが防止される。[0014] Moreover, as described above, the lubricating oil that has flowed into the seal chamber 11 is removed by the dam member 13. This effectively prevents the lubricating oil from flowing in the direction of the oil seal 9, and the swirling flow of the lubricating oil is As shown in FIG. 3, since it is carried out inside the dam member 13, The dam member 13 reliably limits the outward pressing force on the oil seal 9 due to It will be done. Therefore, in conjunction with the action of the guide member 14, the oil seal 9 is The outward pressing force is sufficiently reduced. As a result, the oil seal 9 has a good seal. The performance is maintained and the oil seal 9 is prevented from coming off inadvertently.
【0015】 また、この実施例では、ダム部材13とガイド部材14とを予め一体的に形成 したため、ポンプケーシング1への組付作業が比較的容易である。さらに、ガイ ド部材14は、ポンプケーシング1とは別体に形成されているから、シール室1 1内にドレン孔12の一端開口部12aが形成されているオイルポンプに追加す ることが容易である。[0015] Further, in this embodiment, the dam member 13 and the guide member 14 are integrally formed in advance. Therefore, the assembly work to the pump casing 1 is relatively easy. In addition, Guy Since the door member 14 is formed separately from the pump casing 1, the seal chamber 1 1 is added to the oil pump in which one end opening 12a of the drain hole 12 is formed. It is easy to
【0016】 図4〜図6は第2請求項の考案に対応する実施例を示し、この実施例ではドレ ン孔がポンプケーシング1ではなく駆動軸3とインナーギア4との連結個所に設 けられているものである。[0016] 4 to 6 show an embodiment corresponding to the invention of the second claim, and in this embodiment, the drain The hole is located not in the pump casing 1 but at the connection point between the drive shaft 3 and the inner gear 4. It is something that is being criticized.
【0017】 即ち、駆動軸3は、作動室6に位置する部位の直径方向両端部に2面巾3b, 3cが形成されている一方、インナーギア4の駆動軸挿通孔4a内周面に前記2 面巾3b,3cと対応した2面巾4b,4cが形成されており、この2面巾4b ,4cの略中央に一対のドレン溝15,15が軸方向に沿って形成されている。 このドレン溝15,15は、一端開口部15a,15aがシール室11に、他端 開口部がクランクケース内に臨んでいる。[0017] That is, the drive shaft 3 has a width across flats 3b, at both diametrical ends of a portion located in the working chamber 6. 3c is formed on the inner peripheral surface of the drive shaft insertion hole 4a of the inner gear 4. Widths across flats 4b and 4c corresponding to widths across flats 3b and 3c are formed, and width across flats 4b , 4c, a pair of drain grooves 15, 15 are formed along the axial direction approximately in the center of the drain grooves 15, 4c. The drain grooves 15, 15 have openings 15a, 15a at one end connected to the seal chamber 11, and openings 15a at the other end. The opening faces into the crankcase.
【0018】 また、インナーギア4のカラー部7先端に一対の突起状の掻集部材16,16 が一体に設けられている。具体的に説明すれば、この掻集部材16,16は、前 記2面巾4b,4cの一端縁つまりドレン溝15,15の一端開口部15a,1 5aよりも駆動軸3の回転方向後方位置に設けられており、その先端部16a, 16aがシール室11内に臨んでいると共に、側縁部16b,16bが各ドレン 溝15,15の軸中心線側に折曲形成されている。[0018] In addition, a pair of protruding scraping members 16, 16 are provided at the tip of the collar portion 7 of the inner gear 4. are integrated. To be more specific, the scraping members 16, 16 are One end edge of the width across sides 4b, 4c, that is, one end opening 15a, 1 of the drain groove 15, 15. 5a in the rotational direction of the drive shaft 3, and its tip portion 16a, 16a faces into the seal chamber 11, and side edges 16b, 16b face each drain. The grooves 15, 15 are bent on the axis center line side.
【0019】 尚、図6中17,18はポンプケーシング1なお内部両側に設けられた吸入室 と吐出室である。[0019] In addition, 17 and 18 in Fig. 6 are the suction chambers provided on both sides of the pump casing 1. and the discharge chamber.
【0020】 したがって、この実施例によれば、ポンプの回転中に作動室6内からクリアラ ンスCを通ってシール室11内に流入しようとした潤滑油は、インナーギア4と 一体に回転している掻集部材16,16の先端部16a及び側縁部16bによっ て強制的に掻き集められて、そのまま各一端開口部15a,15aからドレン溝 15,15内へ速やかに案内される。したがって、シール室11内への潤滑油の 流入量が減少し、この結果、シール室11内の油圧の上昇が抑制され、オイルシ ール9に対する外方への押圧力が低下する。[0020] Therefore, according to this embodiment, the clearing liquid is removed from the working chamber 6 while the pump is rotating. The lubricating oil that was about to flow into the seal chamber 11 through the inner gear 4 The tip portion 16a and side edge portion 16b of the scraping members 16, 16 that rotate together The drain groove is forcibly collected from the openings 15a and 15a at each end. 15, 15. Therefore, lubricating oil enters the seal chamber 11. The inflow amount decreases, and as a result, the rise in the oil pressure inside the seal chamber 11 is suppressed, and the oil pressure increases. The outward pressing force on the roller 9 is reduced.
【0021】 特に、この実施例では、掻集部材16,16によって潤滑油を強制的に掻集し てドレン溝15,15内へ積極的に送り込むため、シール室11内の油圧の上昇 を効果的に抑制することができる。[0021] In particular, in this embodiment, the lubricating oil is forcibly scraped off by the scraping members 16, 16. In order to actively feed the water into the drain grooves 15, 15, the oil pressure inside the seal chamber 11 increases. can be effectively suppressed.
【0022】 また、シール室11内に既に流入している潤滑油をも、強制的に掻き集めてド レン溝15,15内に送り出すことができるので、シール室11の油圧低減効果 は極めて大きなものとなる。[0022] Additionally, the lubricating oil that has already flowed into the seal chamber 11 is forcibly scraped up and removed. Since it can be fed into the cylinder grooves 15, 15, the oil pressure in the seal chamber 11 can be reduced. becomes extremely large.
【0023】 更に、この実施例では、ドレン溝15,15をポンプケーシング1ではなくイ ンナーギア4の2面巾4b,4cに切削加工により設けたため、その加工作業が 比較的容易であり、製造コストの点でも有利となる。[0023] Furthermore, in this embodiment, the drain grooves 15, 15 are located not in the pump casing 1, but in the pump casing 1. Since the width across flats 4b and 4c of the inner gear 4 were formed by cutting, the machining work was It is relatively easy and advantageous in terms of manufacturing cost.
【0024】 尚、各考案は各実施例の構成に限定されるものではなく、例えば第2請求項の 実施例においては、掻集部材をカラー部のないインナーギアの端部に設けること も可能である。[0024] It should be noted that each invention is not limited to the configuration of each embodiment, for example, the configuration of the second claim. In the embodiment, the scraping member is provided at the end of the inner gear that does not have a collar part. is also possible.
【0025】[0025]
以上の説明で明らかなように、各請求項による各考案によればポンプケーシン グからシール室内に流入した潤滑油あるいは流入しようとした潤滑油を、ガイド 部材あるいは掻集部材によって、各ドレン孔へ強制的に案内して外部へ速やかに 排出することができ、またダム部材によってオイルシール側への潤滑油の流入を 阻止することができるため、シール室内の圧力が低下すると共に、オイルシール の直接的な外方への押圧力が低下する。この結果、オイルシールの良好なシール 性能を維持できると共に、オイルシールの不用意な抜け出しを確実に防止できる 。 As is clear from the above explanation, according to each invention according to each claim, the pump casing Guides the lubricating oil that has flowed into the seal chamber from the plug or is about to flow into the seal chamber. It is forcibly guided to each drain hole by a member or scraping member and quickly released to the outside. The dam member prevents lubricating oil from flowing into the oil seal side. As a result, the pressure inside the seal chamber decreases and the oil seal The direct outward pressing force of This results in a good sealing of the oil seal. Not only can performance be maintained, but the oil seal can also be reliably prevented from accidentally slipping out. .
【図面の簡単な説明】[Brief explanation of drawings]
【図1】第1請求項の考案に対応する一実施例を示すオ
イルポンプの縦断面図。FIG. 1 is a longitudinal sectional view of an oil pump showing an embodiment corresponding to the invention of claim 1.
【図2】Aは本実施例のダム部材及びガイド部材を示す
正面図、Bは同ダム部材とガイド部材の側面図。FIG. 2A is a front view showing the dam member and guide member of this embodiment, and B is a side view of the same dam member and guide member.
【図3】本実施例の要部拡大図。FIG. 3 is an enlarged view of the main parts of this embodiment.
【図4】第1請求項の考案に対応する一実施例を示す図
6のA−A線断面図。FIG. 4 is a sectional view taken along the line A-A in FIG. 6, showing an embodiment corresponding to the invention of the first claim.
【図5】本実施例に供されるインナーギアの背面図。FIG. 5 is a rear view of the inner gear used in this embodiment.
【図6】本実施例のオイルポンプを示す正面図。FIG. 6 is a front view showing the oil pump of this embodiment.
【図7】従来のオイルポンプを示す縦断面図。FIG. 7 is a longitudinal sectional view showing a conventional oil pump.
1…ポンプケーシング 3…駆動軸 4…インナーギア 5…アウターギア 9…オイルシール 11…シール室 12…ドレン孔 12a…一端開口部 13…ダム部材 14…ガイド部材 15…ドレン溝(ドレン孔) 15a…一端開口部 16…掻集部材 16a…先端部 1...Pump casing 3...Drive shaft 4...Inner gear 5...Outer gear 9...Oil seal 11... Seal chamber 12...Drain hole 12a...One end opening 13...Dam member 14...Guide member 15...Drain groove (drain hole) 15a...One end opening 16...Scraping member 16a...Tip part
Claims (2)
ギアとを内部に回転自在に収納したポンプケーシング
と、該ポンプケーシングの略中心部を貫通し、前記イン
ナーギアが連結した駆動軸と、前記ポンプケーシングの
一側部と前記駆動軸との間に介装され、かつ内側にシー
ル室を形成するオイルシールと、前記ポンプケーシング
内に形成されて、一端が前記シール室に開口したドレン
孔とを備えたオイルポンプにおいて、前記シール室内の
前記ドレン孔の一端開口部よりも前記駆動軸の回転方向
前方位置に、前記ポンプケーシングとは別体のガイド部
材を設けると共に、前記シール室内のドレン孔一端開口
部とオイルシールとの間にダム部材を設けたことを特徴
とするオイルポンプ。1. A pump casing that rotatably houses an inner gear and an outer gear that mesh with each other; a drive shaft that passes through a substantially central portion of the pump casing and is connected to the inner gear; and the pump casing. an oil seal interposed between one side portion and the drive shaft and forming a seal chamber inside; and a drain hole formed within the pump casing and having one end open to the seal chamber. In the oil pump, a guide member separate from the pump casing is provided at a position forward of the opening at one end of the drain hole in the seal chamber in the rotational direction of the drive shaft, An oil pump characterized in that a dam member is provided between the part and the oil seal.
ギアとを内部に回転自在に収納したポンプケーシング
と、該ポンプケーシングの略中心部を貫通し、前記イン
ナーギアが連結した駆動軸と、前記ポンプケーシングの
一側部と前記駆動軸との間に介装され、かつ内側にシー
ル室を形成するオイルシールと、前記インナーギアと駆
動軸との連結個所に形成され、一端が前記シール室に開
口したドレン孔とを備えたオイルポンプにおいて、前記
インナーギア端部のドレン孔一端開口部よりも前記駆動
軸の回転方向後方位置に、先端部がシール室内に臨む掻
集部材を設けたことを特徴とするオイルポンプ。2. A pump casing rotatably housing an inner gear and an outer gear that mesh with each other; a drive shaft passing through substantially the center of the pump casing and connected to the inner gear; and the pump casing. an oil seal interposed between one side portion and the drive shaft and forming a seal chamber inside; and an oil seal formed at a connection point between the inner gear and the drive shaft, one end opening into the seal chamber. An oil pump having a drain hole, characterized in that a scraping member is provided at a position rearward in the rotational direction of the drive shaft with respect to an opening at one end of the drain hole at the end of the inner gear, the tip of which faces into the seal chamber. oil pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991008203U JP2573717Y2 (en) | 1991-02-22 | 1991-02-22 | Oil pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991008203U JP2573717Y2 (en) | 1991-02-22 | 1991-02-22 | Oil pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04105697U true JPH04105697U (en) | 1992-09-11 |
JP2573717Y2 JP2573717Y2 (en) | 1998-06-04 |
Family
ID=31899350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991008203U Expired - Lifetime JP2573717Y2 (en) | 1991-02-22 | 1991-02-22 | Oil pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2573717Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180049842A (en) * | 2016-11-03 | 2018-05-14 | 명화공업주식회사 | Gear pump |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02131093U (en) * | 1989-04-05 | 1990-10-30 |
-
1991
- 1991-02-22 JP JP1991008203U patent/JP2573717Y2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02131093U (en) * | 1989-04-05 | 1990-10-30 |
Also Published As
Publication number | Publication date |
---|---|
JP2573717Y2 (en) | 1998-06-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3937477A (en) | Mechanical seal system | |
JP2699390B2 (en) | Internal gear motor | |
US6099243A (en) | Centrifugal pump with seal cooling and debris flushing arrangement | |
JP2013234757A (en) | Sealing arrangement for flow machine | |
KR19990007247A (en) | Hydraulic pump | |
JPH0151912B2 (en) | ||
JPH04105697U (en) | oil pump | |
JP6949200B2 (en) | Rotating machines and turbochargers | |
US7234924B2 (en) | Rotary combustion engine with device for conveying lubricating oil | |
JP2013122219A (en) | Water pump | |
US3053541A (en) | Rotary shaft fluid seal | |
US4274815A (en) | Rotary combustion engine of trochoid design with oil return groove | |
US6048185A (en) | Hydraulic pumps | |
KR0148866B1 (en) | Inscribed type oil pump | |
JP2528013Y2 (en) | Oil pump | |
JPH1162600A (en) | Centrifugal fluid machine | |
JPH0746780Y2 (en) | Internal combustion engine oil pump | |
JP3754181B2 (en) | Hydraulic pump | |
JP4895486B2 (en) | Oil pump | |
JPH0128319Y2 (en) | ||
JPS59213979A (en) | Device for fluidly supporting rotary sleeve in rotary compressor | |
JPS6397874A (en) | Lubricating mechanism for oil seal of ignition distributor | |
JP2574282Y2 (en) | Internal oil pump | |
JP3732621B2 (en) | Hydraulic pump | |
JPH0736143Y2 (en) | pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R323111 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
EXPY | Cancellation because of completion of term |