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JP4096657B2 - pump - Google Patents
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JP4096657B2 - pump - Google Patents

pump

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Publication number
JP4096657B2
JP4096657B2 JP2002227889A JP2002227889A JP4096657B2 JP 4096657 B2 JP4096657 B2 JP 4096657B2 JP 2002227889 A JP2002227889 A JP 2002227889A JP 2002227889 A JP2002227889 A JP 2002227889A JP 4096657 B2 JP4096657 B2 JP 4096657B2
Authority
JP
Japan
Prior art keywords
fitting
tank
seal ring
pump
outer fitting
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
Application number
JP2002227889A
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Japanese (ja)
Other versions
JP2004068683A (en
Inventor
善明 浜崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Priority to JP2002227889A priority Critical patent/JP4096657B2/en
Publication of JP2004068683A publication Critical patent/JP2004068683A/en
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Publication of JP4096657B2 publication Critical patent/JP4096657B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、油圧ポンプ等のポンプに関する。
【0002】
【従来の技術】
近年の自動車には、パワーステアリング装置、自動変速装置等、油圧により作動し、運転操作を補助するための多くの補機が装備されており、これらの補機の作動油圧を発生すべく油圧ポンプが搭載されている。
【0003】
この油圧ポンプは、例えば特開2000−154791に開示されているように、圧液発生部を有するポンプ本体と、該ポンプ本体の一側に連結されたモータと、ポンプ本体の他側にポンプ本体を囲繞するように装着され、ポンプ本体の吸込路となるタンクとを備えている。
【0004】
油圧ポンプのタンクは、例えば前記特開2000−154791に開示されているように、複数本のボルトによってポンプ本体に取付けられるか、又は、特開平11−301504号公報に記載されているように、バンドによってポンプ本体に取付けられる。このバンドを備えるポンプは、ポンプ本体が被外嵌部を有し、この被外嵌部に嵌合される嵌合筒部が前記タンクに設けられている。この被外嵌部及び嵌合筒部の嵌合域で、被外嵌部の端部外周面に環状溝が設けられており、この環状溝にシール環が配置されている。
【0005】
ところで、ボルトによってタンクを取付ける構成にあっては、ボルトの本数を削減すべくタンク取付用ボルトの複数本がモータ取付用ボルトを兼ねており、モータ取付用ボルトの複数本がタンク取付用ボルトを兼ねているため、タンク及びモータを単独で固定するボルトの本数が少なく、タンク及びモータの取付けを強固に行い難いのであり、また、タンクが補修用の部品として要求された際に、複数本のボルトの弛緩/締付作業が必要であるため、バンドで取付けるものに比べてタンクの補修作業性が悪かった。従って、タンクの補修作業性を考慮した場合、タンクをバンドで取付けるのが好ましい。
【0006】
【発明が解決しようとする課題】
しかしながら、バンドでタンクを取付ける構成にあっては、被外嵌部の端部外周面にシール環が配置されており、嵌合筒部の嵌合初期からシール環を弾性変形させつつ嵌合筒部を挿入するように構成されているため、嵌合筒部が被外嵌部に挿入されるとき、嵌合筒部によって前記シール環が損傷し易いし、また、バンドの緊締力によってシール環の弾性変形量が増加することになり、シール環による封止が不安定になると言う問題があった。また、タンクのポンプ本体に対する周方向位置を決めることができないため、組立て時にタンクのポンプ本体に対する周方向位置に誤りが発生することがあり、改善策が要望されていた。
【0007】
本発明は斯かる事情に鑑みてなされたものであり、バンドによってタンクを取付ける構成において、シール環の損傷を少なくし、シール環による封止性を高めることができるとともに、封止を長期間に亘って安定させることができ、さらに、タンクのポンプ本体に対する位置を簡易に決めることができるポンプを提供することを目的とする。
【0008】
【課題を解決するための手段】
第1発明に係るポンプは、座面に連なる被外嵌部を有するポンプ本体と、該ポンプ本体の吸込路となり、前記被外嵌部に嵌合される嵌合筒部を有するタンクと、前記被外嵌部及び嵌合筒部の間に配置されるシール環と、前記嵌合筒部を緊締するバンドとを備えたポンプにおいて、前記タンクのポンプ本体に対する位置を決める位置決め手段を有し、該位置決め手段は前記被外嵌部が有する凹部と、該凹部に係合し、前記嵌合筒部が有する凸部とからなり、前記被外嵌部は座面に対して垂直状になっており、該被外嵌部の周面の一部に、該被外嵌部の中心軸線に対して中心側へ傾斜するテーパ状の嵌合案内溝を有し、前記嵌合筒部は前記バンドが巻回される巻回部を有し、前記シール環は前記巻回部よりも前記嵌合筒部の開口縁側に配置され、前記シール環と前記被外嵌部との圧接面である嵌合凹所の変形を抑制する環状凸部を前記嵌合筒部が備えることを特徴とする。
【0009】
第1発明にあっては、嵌合筒部の巻回部よりも開口縁側にシール環が配置されているため、嵌合筒部を被外嵌部に嵌合するとき、嵌合後期にシール環を弾性変形させることができ、シール環の損傷を少なくすることができる。しかも、シール環は前記巻回部よりも嵌合筒部の開口縁側に配置してあるため、バンドの緊締力によってシール環の撓み量が増加することを抑制でき、シール環の耐久性を高めることができるとともに、シール環による封止を長期間に亘って安定させることができ、液洩れを防ぐことができる。
【0011】
また、嵌合筒部を被外嵌合部に嵌合してタンクをポンプ本体に取付ける際、位置決め手段によってタンクのポンプ本体に対する位置を決めることができるため、タンクの取付位置の間違いをなくすることができる。
【0013】
また、嵌合筒部の凸部を被外嵌部の凹部に係合させた状態で嵌合筒部を被外嵌部に挿入することにより、嵌合筒部の凸部を被外嵌部の凹部に係合させることができるため、タンクの組込を容易にでき、しかも、ポンプ本体に対する適正位置にタンクを自動的に位置させることができる。
【0014】
【発明の実施の形態】
以下本発明をその実施の形態を示す図面に基づいて詳述する。図1は本発明に係るポンプの構成を示す断面図、図2は本発明に係るポンプの要部の構成を示す拡大断面図、図3は被外嵌部の一部を拡大した斜視図である。
【0015】
ポンプは、圧液発生部11を有するポンプ本体1と、該ポンプ本体1の一側にブラケット2を介して複数本のボルト3により取付けられたモータ4と、ポンプ本体1を囲繞し、該ポンプ本体1の吸込路となるタンク5と、該タンク5をポンプ本体1に取付けるバンド6とを備えている。
【0016】
ポンプ本体1は、前記モータ4に結合される略円形の座体12と、該座体12のモータ4と反対側に筒形のハウジング13を介して結合された蓋板14と、前記ハウジング13内に内装された一対のギヤ15,15とを備えており、前記ハウジング13内を圧液発生部11としてある。前記ハウジング13の一側には前記圧液発生部11及びタンク5内に連通する吸込路が設けられている。
座体12には図1、図3に示すように周縁部の座面12aから前記タンク5側へ垂直状に突設された円筒形の被外嵌部16が設けられている。また、前記ギヤ15,15の1つは入力軸10を介して前記モータ4の出力軸41に連結されている。
【0017】
タンク5は、その底部に供給口51及び該供給口51に嵌合されたキャップ52を有する有底の円筒体であり、その開口側には、前記被外嵌部16に嵌合される断面円形の嵌合筒部53が設けられており、また、周面の一側には返戻管54が突設されている。
【0018】
被外嵌部16及び嵌合筒部53の嵌合域で、被外嵌部16には複数(例えば3つ)の凹部17が周方向に離間して等配されており、嵌合筒部53には前記凹部17に係合する凸部55が凹部17に対応して突設されており、凹部17及び凸部55が係合することによりポンプ本体1に対するタンク5の位置、詳しくは被外嵌部16に対するタンク5の嵌合方向及び周方向の位置を決めるようにしてある。
【0019】
被外嵌部16には開口縁から各凹部17に連なり、前記凸部55が係合するテーパ形の嵌合案内溝18が設けられている。この嵌合案内溝18は、図2に示すように被外嵌部16の中心軸線に対して中心側へ傾斜するテーパ状をなし、被外嵌部16の開口縁から凹部17にかけて浅くなり、凹部17に至るまでは凸部55と被外嵌部16との接触抵抗を低減し、凹部17では凸部55を係止することができるようにしてある。また、被外嵌部16の凹部17に対して開口縁と反対側にはシール環嵌合面19が設けられている。
【0020】
嵌合筒部53の外周面には前記凸部55の外周りから開口縁と反対側位置に前記バンド6が巻回される凹溝形の巻回部56を有しており、嵌合筒部53の開口縁部内側にはテーパ面を有する環状凹所57が設けられており、該環状凹所57と前記シール環嵌合面19との間にOリングからなるシール環7が配置されている。また、嵌合筒部53の開口縁部外周面には環状凸部58を設けてシール環7による環状凹所57部分の変形を防ぐようにしてある。
バンド6は前記巻回部56に巻回される環部の両端間に締付ねじを有しており、該締付ねじを回転操作することにより環部を縮径するようにしてある。
【0021】
以上のように構成されたポンプのタンク5をポンプ本体1の被外嵌部16に取付ける場合、シール環7が被外嵌部16のシール環嵌合面19に挿入されており、また、バンド6が嵌合筒部53の巻回部56に巻回保持された状態でタンク5の嵌合筒部53が被外嵌部16に挿入される。この際、嵌合筒部53の嵌合域に突設された3つの凸部55が、被外嵌部16の3つの嵌合案内溝18に係合し、該嵌合案内溝18に沿って容易に挿入することができる。また、嵌合案内溝18はテーパになっているため、タンク5の挿入に伴い嵌合筒部53は拡径方向へ弾性変形しつつ挿入され、さらに、嵌合域の終端近くで環状凹所57が前記シール環7に接触し、該シール環7をシール環嵌合面19との間で弾性変形させ、該シール環7が被外嵌部16及び嵌合筒部53の間を封止した状態で凸部55が凹部17に係合し、タンク5の装着状態を維持することができる。この後、バンド6の締付ねじを回転操作し、バンド6によって嵌合筒部53を緊締し、該嵌合筒部53を被外嵌部16に固定する。
【0022】
このようにタンク5を取付ける場合、シール環7は嵌合域の終端近くで弾性変形させるため、嵌合筒部53を被外嵌部16に嵌合するとき、シール環7の損傷を少なくすることができ、しかも、シール環7は前記巻回部56よりも嵌合筒部53の開口縁側に配置してバンド6の緊締力がシール環7に影響し難くしてあるため、バンド6の緊締力によってシール環7の弾性変形量が増加することを低減することができ、シール環の耐久性を高めることができるとともに、シール環7による封止を長期間に亘って安定させることができる。また、環状凹所57とシール環嵌合面19との間で弾性変形したシール環7の弾性復元力が嵌合筒部53の開口縁部に加わることになるが、この開口縁部には環状凸部58が設けられているため、シール環7による環状凹所57部分の変形を抑制することができ、嵌合筒部53の耐久性を高めることができる。
【0023】
また、嵌合筒部53を被外嵌部16に嵌合するとき、凸部55が嵌合案内溝18に接触し、嵌合案内溝18に沿って挿入することができるため、返戻管54を有するタンク5のポンプ本体1に対する位置、詳しくはタンクの嵌合方向の位置及び周方向の位置を容易に、しかも正確に位置決めでき、タンクの取付位置を間違うことなくタンクを容易に組込むことができ、さらに、嵌合筒部53の嵌合位置では凸部55が凹部17に係合し、タンク5の正確な位置を維持することができる。
【0024】
尚、以上説明した実施の形態では被外嵌部16に凹部17を設け、嵌合筒部53に凸部55を設けたが、その他、被外嵌部16に凸部55を設け、嵌合筒部53に凹部17を設けた構成としてもよい。また、凹部17及び凸部55は複数である他、1つであってもよい。また、凹部17に連なる嵌合案内溝18を設けたが、その他、この嵌合案内溝18に代えて、嵌合案内溝18の位置を標示する標示部を設けてもよい。
【0025】
また、本発明のポンプは、主として自動車のパワーステアリング装置、自動変速装置等、油圧により作動し、運転操作を補助するための補機の作動油圧を発生するための油圧ポンプとして用いられるのであるが、その他、油以外の液体を取り扱い対象とするポンプにおいても適用可能であることは言うまでもない。
【0026】
【発明の効果】
以上詳述したように第1発明によれば、嵌合筒部を被外嵌部に嵌合するとき、シール環の損傷を少なくすることができ、しかも、シール環は前記巻回部よりも嵌合筒部の開口縁側に配置してあるため、バンドの緊締力によってシール環の撓み量が増加することをなくすることができ、シール環による封止を長期間に亘って安定させることができる。
【0027】
また、位置決め手段によってタンクのポンプ本体に対する位置を決めることができるため、タンクの取付位置の間違いをなくすることができる。
【0028】
また、嵌合筒部の凸部を被外嵌部の凹部に係合させることができるため、タンクの組込を容易にでき、しかも、ポンプ本体に対する適正位置をタンクを自動的に位置させることができる。
【図面の簡単な説明】
【図1】本発明に係るポンプの構成を示す断面図である。
【図2】
本発明に係るポンプの要部の構成を示す拡大断面図である。
【図3】
本発明に係るポンプの被外嵌部の一部を拡大した斜視図である。
【符号の説明】
1 ポンプ本体
16 被外嵌部
17 凹部
18 嵌合案内溝
5 タンク
53 嵌合筒部
55 凸部
56 巻回部
57 環状凹所
6 バンド
7 シール環
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump such as a hydraulic pump.
[0002]
[Prior art]
Modern automobiles are equipped with a number of auxiliary machines that operate by hydraulic pressure and assist driving operations, such as power steering devices and automatic transmissions, and hydraulic pumps are used to generate hydraulic pressures for these auxiliary machines. Is installed.
[0003]
As disclosed in, for example, Japanese Patent Laid-Open No. 2000-154791, this hydraulic pump includes a pump body having a pressure liquid generating portion, a motor connected to one side of the pump body, and a pump body on the other side of the pump body. And a tank serving as a suction passage for the pump body.
[0004]
The tank of the hydraulic pump is attached to the pump body by a plurality of bolts as disclosed in, for example, the above-mentioned JP 2000-154791, or as described in JP 11-301504 A, Attached to the pump body with a band. In the pump including this band, the pump main body has an outer fitting portion, and a fitting cylinder portion fitted to the outer fitting portion is provided in the tank. An annular groove is provided on the outer peripheral surface of the end portion of the fitted part in the fitting region of the fitted part and the fitted cylinder part, and a seal ring is disposed in the annular groove.
[0005]
By the way, in the configuration in which the tank is attached by bolts, in order to reduce the number of bolts, a plurality of tank mounting bolts also serve as motor mounting bolts, and a plurality of motor mounting bolts serve as tank mounting bolts. Therefore, the number of bolts for fixing the tank and motor alone is small, and it is difficult to firmly attach the tank and motor. Also, when the tank is required as a repair part, Since the bolts need to be loosened / tightened, the tank repair workability was worse than that of the bolts. Therefore, when the repair workability of the tank is taken into consideration, it is preferable to attach the tank with a band.
[0006]
[Problems to be solved by the invention]
However, in the configuration in which the tank is attached with the band, the seal ring is arranged on the outer peripheral surface of the end portion of the fitted part, and the fitting cylinder is elastically deformed from the initial fitting stage of the fitting cylinder part. The seal ring is easily damaged by the fitting tube portion when the fitting tube portion is inserted into the external fitting portion, and the seal ring is tightened by the band tightening force. As a result, the amount of elastic deformation increases and the sealing with the seal ring becomes unstable. Further, since the circumferential position of the tank relative to the pump body cannot be determined, an error may occur in the circumferential position of the tank relative to the pump body during assembly, and an improvement measure has been desired.
[0007]
The present invention has been made in view of such circumstances, and in a configuration in which a tank is attached by a band, damage to the seal ring can be reduced, sealing performance by the seal ring can be improved, and sealing can be performed for a long period of time. It is another object of the present invention to provide a pump that can be stabilized over time and that can easily determine the position of the tank relative to the pump body.
[0008]
[Means for Solving the Problems]
A pump according to a first aspect of the present invention is a pump main body having an outer fitting portion that is continuous with a seating surface, a tank having a fitting cylinder portion that is a suction passage of the pump main body and is fitted to the outer fitting portion, In a pump including a seal ring disposed between the outer fitting portion and the fitting cylinder portion and a band for tightening the fitting cylinder portion, the pump has positioning means for determining the position of the tank with respect to the pump body, The positioning means includes a concave portion of the outer fitting portion and a convex portion which engages with the concave portion and the fitting cylinder portion has, and the outer fitting portion is perpendicular to the seating surface. A fitting guide groove having a tapered shape that is inclined toward the center with respect to the central axis of the outer fitting portion, and the fitting cylinder portion is formed of the band. There have a winding portion wound around said seal ring is disposed in the opening edge side of the fitting cylindrical portion than the winding portion, Wherein the serial seal ring to suppress annular projection deformation of the fitting concave is a contact face of the outer fitting portion and said fitting tubular portion is provided.
[0009]
In the first invention, since the seal ring is arranged on the opening edge side of the winding portion of the fitting tube portion, when the fitting tube portion is fitted to the outer fitting portion, the seal is sealed at the later stage of fitting. The ring can be elastically deformed, and damage to the seal ring can be reduced. In addition, since the seal ring is arranged on the opening edge side of the fitting cylinder part with respect to the winding part, it is possible to suppress an increase in the bending amount of the seal ring due to the tightening force of the band, and to improve the durability of the seal ring. In addition, the sealing with the seal ring can be stabilized over a long period of time, and liquid leakage can be prevented.
[0011]
In addition, when fitting the fitting cylinder part to the outer fitting part and attaching the tank to the pump body, the position of the tank relative to the pump body can be determined by the positioning means, thus eliminating the mistake in the tank attachment position. be able to.
[0013]
Moreover, the convex part of the fitting cylinder part is inserted into the fitting part with the convex part of the fitting cylinder part engaged with the concave part of the fitting part, so that the convex part of the fitting cylinder part is inserted into the fitting part. Therefore, the tank can be easily assembled, and the tank can be automatically positioned at an appropriate position with respect to the pump body.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof. FIG. 1 is a cross-sectional view showing the structure of a pump according to the present invention, FIG. 2 is an enlarged cross-sectional view showing the structure of a main part of the pump according to the present invention, and FIG. is there.
[0015]
The pump surrounds the pump main body 1 having a pressurized liquid generating portion 11, a motor 4 attached to one side of the pump main body 1 via a bracket 2 with a plurality of bolts 3, and the pump main body 1. A tank 5 serving as a suction passage for the main body 1 and a band 6 for attaching the tank 5 to the pump main body 1 are provided.
[0016]
The pump body 1 includes a substantially circular seat body 12 coupled to the motor 4, a lid plate 14 coupled to the opposite side of the seat body 12 from the motor 4 via a cylindrical housing 13, and the housing 13. The housing 13 includes a pair of gears 15 and 15, and the inside of the housing 13 is used as the pressurized liquid generating portion 11. On one side of the housing 13, a suction passage that communicates with the pressure liquid generating unit 11 and the tank 5 is provided.
As shown in FIGS. 1 and 3, the seat body 12 is provided with a cylindrical outer fitting portion 16 projecting vertically from the seating surface 12 a at the peripheral portion toward the tank 5. One of the gears 15 and 15 is connected to the output shaft 41 of the motor 4 through the input shaft 10.
[0017]
The tank 5 is a bottomed cylindrical body having a supply port 51 and a cap 52 fitted to the supply port 51 at the bottom, and a cross-section fitted to the outer fitting portion 16 on the opening side. A circular fitting cylinder portion 53 is provided, and a return pipe 54 projects from one side of the peripheral surface.
[0018]
In the fitting region of the fitted part 16 and the fitting cylinder part 53, a plurality of (for example, three) recesses 17 are equally spaced apart from each other in the circumferential direction in the fitted part 16. 53 is provided with a projecting portion 55 that engages with the recessed portion 17 so as to correspond to the recessed portion 17, and the position of the tank 5 relative to the pump body 1, in detail, is covered by the engagement of the recessed portion 17 and the projecting portion 55. The fitting direction of the tank 5 with respect to the outer fitting portion 16 and the position in the circumferential direction are determined.
[0019]
The outer fitting portion 16 is provided with a taper-shaped fitting guide groove 18 that is connected to each concave portion 17 from the opening edge and engages with the convex portion 55. As shown in FIG. 2, the fitting guide groove 18 has a tapered shape that is inclined toward the center with respect to the central axis of the fitted portion 16, and becomes shallower from the opening edge of the fitted portion 16 to the recessed portion 17, The contact resistance between the convex portion 55 and the fitted portion 16 is reduced until the concave portion 17 is reached, and the convex portion 55 can be locked in the concave portion 17. A seal ring fitting surface 19 is provided on the side opposite to the opening edge with respect to the concave portion 17 of the outer fitting portion 16.
[0020]
The outer peripheral surface of the fitting cylinder part 53 has a concave groove-shaped winding part 56 around which the band 6 is wound from the outer periphery of the convex part 55 to the position opposite to the opening edge. An annular recess 57 having a tapered surface is provided inside the opening edge of the portion 53, and a seal ring 7 made of an O-ring is disposed between the annular recess 57 and the seal ring fitting surface 19. ing. Further, an annular convex portion 58 is provided on the outer peripheral surface of the opening edge portion of the fitting tube portion 53 so as to prevent the annular recess 57 portion from being deformed by the seal ring 7.
The band 6 has a fastening screw between both ends of the ring part wound around the winding part 56, and the diameter of the ring part is reduced by rotating the fastening screw.
[0021]
When the tank 5 of the pump configured as described above is attached to the fitted part 16 of the pump body 1, the seal ring 7 is inserted into the seal ring fitting surface 19 of the fitted part 16, and the band The fitting cylinder part 53 of the tank 5 is inserted into the outer fitting part 16 in a state where 6 is wound around the winding part 56 of the fitting cylinder part 53. At this time, the three convex portions 55 protruding from the fitting region of the fitting cylinder portion 53 engage with the three fitting guide grooves 18 of the outer fitting portion 16, and follow the fitting guide grooves 18. Can be inserted easily. Further, since the fitting guide groove 18 is tapered, the fitting cylinder portion 53 is inserted while being elastically deformed in the diameter increasing direction with the insertion of the tank 5, and further, an annular recess is formed near the end of the fitting region. 57 contacts the seal ring 7 and elastically deforms the seal ring 7 between the seal ring fitting surface 19 and the seal ring 7 seals between the fitted part 16 and the fitting cylinder part 53. In this state, the convex portion 55 engages with the concave portion 17, and the mounting state of the tank 5 can be maintained. Thereafter, the fastening screw of the band 6 is rotated, the fitting cylinder part 53 is tightened by the band 6, and the fitting cylinder part 53 is fixed to the external fitting part 16.
[0022]
When the tank 5 is mounted in this way, the seal ring 7 is elastically deformed near the end of the fitting region, and therefore, when the fitting tube portion 53 is fitted to the external fitting portion 16, damage to the seal ring 7 is reduced. In addition, since the seal ring 7 is arranged on the opening edge side of the fitting tube part 53 with respect to the winding part 56 so that the tightening force of the band 6 does not easily affect the seal ring 7, The increase in the elastic deformation amount of the seal ring 7 due to the tightening force can be reduced, the durability of the seal ring can be increased, and the sealing by the seal ring 7 can be stabilized over a long period of time. . Further, the elastic restoring force of the seal ring 7 elastically deformed between the annular recess 57 and the seal ring fitting surface 19 is applied to the opening edge of the fitting tube portion 53. Since the annular convex portion 58 is provided, deformation of the annular recess 57 portion by the seal ring 7 can be suppressed, and the durability of the fitting cylindrical portion 53 can be enhanced.
[0023]
Further, when the fitting tube portion 53 is fitted to the fitted portion 16, the convex portion 55 comes into contact with the fitting guide groove 18 and can be inserted along the fitting guide groove 18. The position of the tank 5 with respect to the pump body 1, more specifically, the position of the tank in the fitting direction and the position in the circumferential direction can be easily and accurately positioned, and the tank can be easily assembled without the wrong mounting position of the tank. In addition, the convex portion 55 engages with the concave portion 17 at the fitting position of the fitting cylinder portion 53, and the accurate position of the tank 5 can be maintained.
[0024]
In the embodiment described above, the recessed portion 17 is provided in the fitted portion 16 and the protruding portion 55 is provided in the fitting tube portion 53. In addition, the protruding portion 55 is provided in the fitted portion 16 and fitted. It is good also as a structure which provided the recessed part 17 in the cylinder part 53. FIG. Moreover, there may be a plurality of recesses 17 and protrusions 55, or one. In addition, although the fitting guide groove 18 connected to the concave portion 17 is provided, in addition to the fitting guide groove 18, an indication portion for indicating the position of the fitting guide groove 18 may be provided.
[0025]
The pump of the present invention is mainly used as a hydraulic pump for generating hydraulic pressure of an auxiliary machine that is operated by hydraulic pressure and assists driving operation, such as an automobile power steering device and automatic transmission. Needless to say, the present invention is also applicable to pumps that handle liquids other than oil.
[0026]
【The invention's effect】
As described above in detail, according to the first invention, when the fitting tube portion is fitted to the external fitting portion, damage to the seal ring can be reduced, and the seal ring is smaller than the winding portion. Since it is arranged on the opening edge side of the fitting cylinder part, it is possible to prevent the amount of bending of the seal ring from increasing due to the tightening force of the band, and to stabilize the sealing with the seal ring over a long period of time. it can.
[0027]
Further, since the position of the tank relative to the pump body can be determined by the positioning means, it is possible to eliminate an error in the mounting position of the tank.
[0028]
Moreover, since the convex part of the fitting cylinder part can be engaged with the concave part of the outer fitting part, the tank can be easily assembled, and the tank is automatically positioned at an appropriate position with respect to the pump body. Can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a pump according to the present invention.
[Figure 2]
It is an expanded sectional view showing the composition of the important section of the pump concerning the present invention.
[Fig. 3]
It is the perspective view which expanded a part of outer fit part of the pump which concerns on this invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pump main body 16 Outer fitting part 17 Recessed part 18 Fitting guide groove 5 Tank 53 Fitting cylinder part 55 Convex part 56 Winding part 57 Annular recess 6 Band 7 Seal ring

Claims (1)

座面に連なる被外嵌部を有するポンプ本体と、該ポンプ本体の吸込路となり、前記被外嵌部に嵌合される嵌合筒部を有するタンクと、前記被外嵌部及び嵌合筒部の間に配置されるシール環と、前記嵌合筒部を緊締するバンドとを備えたポンプにおいて、
前記タンクのポンプ本体に対する位置を決める位置決め手段を有し、該位置決め手段は前記被外嵌部が有する凹部と、該凹部に係合し、前記嵌合筒部が有する凸部とからなり、
前記被外嵌部は座面に対して垂直状になっており、該被外嵌部の周面の一部に、該被外嵌部の中心軸線に対して中心側へ傾斜するテーパ状の嵌合案内溝を有し、
前記嵌合筒部は前記バンドが巻回される巻回部を有し、
前記シール環は前記巻回部よりも前記嵌合筒部の開口縁側に配置され、
前記シール環と前記被外嵌部との圧接面である嵌合凹所の変形を抑制する環状凸部を前記嵌合筒部が備えることを特徴とするポンプ。
A pump main body having an outer fitting portion connected to the seat surface, a tank having a fitting cylinder portion which is a suction passage of the pump main body and is fitted to the outer fitting portion, and the outer fitting portion and the fitting cylinder In a pump comprising a seal ring disposed between the parts and a band for tightening the fitting tube part,
Positioning means for determining the position of the tank with respect to the pump body, the positioning means includes a concave portion that the outer fitting portion has, and a convex portion that engages with the concave portion and that the fitting cylinder portion has,
The outer fitting portion is perpendicular to the seating surface, and a tapered shape that is inclined toward the center with respect to the central axis of the outer fitting portion is formed on a part of the peripheral surface of the outer fitting portion. Has a fitting guide groove,
The fitting tube may have a wound portion in which the band is wound,
The seal ring is disposed on the opening edge side of the fitting cylinder part from the winding part ,
The pump , wherein the fitting tube portion includes an annular convex portion that suppresses deformation of a fitting recess that is a pressure contact surface between the seal ring and the outer fitting portion .
JP2002227889A 2002-08-05 2002-08-05 pump Expired - Fee Related JP4096657B2 (en)

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JP4096657B2 true JP4096657B2 (en) 2008-06-04

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Publication number Priority date Publication date Assignee Title
JP4920971B2 (en) * 2005-12-28 2012-04-18 日立オートモティブシステムズ株式会社 Tandem trochoid pump
JP6682769B2 (en) * 2015-05-29 2020-04-15 日本電産トーソク株式会社 Pump device

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