JPH1163362A - Pulsation pressure absorbing hose - Google Patents
Pulsation pressure absorbing hoseInfo
- Publication number
- JPH1163362A JPH1163362A JP9233036A JP23303697A JPH1163362A JP H1163362 A JPH1163362 A JP H1163362A JP 9233036 A JP9233036 A JP 9233036A JP 23303697 A JP23303697 A JP 23303697A JP H1163362 A JPH1163362 A JP H1163362A
- Authority
- JP
- Japan
- Prior art keywords
- hose
- peripheral surface
- pressure absorbing
- diameter
- adjusting member
- 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.)
- Pending
Links
Landscapes
- Power Steering Mechanism (AREA)
- Pipe Accessories (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば自動車のパ
ワーステアリングユニットのように流体圧ポンプを圧力
発生源とする流体圧回路中に配設され、流体圧ポンプが
発生する流体圧の脈動を吸収することが可能な脈動圧吸
収ホースに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic circuit, such as a power steering unit of an automobile, which is provided in a hydraulic circuit using a hydraulic pump as a pressure generating source to absorb a pulsation of the hydraulic pressure generated by the hydraulic pump. Pulsating pressure absorbing hose that can be used.
【0002】[0002]
【従来の技術】自動車のパワーステアリングユニット
は、油圧を送出する油圧ポンプと、油圧によって作動す
るギヤやシリンダ等の舵取装置と、油圧ポンプ及び舵取
装置間に接続して油圧を舵取装置側に供給する高圧ホー
スと、舵取装置側から油圧ポンプ側に油圧を戻す低圧ホ
ースとを備えている。2. Description of the Related Art A power steering unit of an automobile includes a hydraulic pump that sends out a hydraulic pressure, a steering device such as a gear and a cylinder that is operated by the hydraulic pressure, and a hydraulic pressure steering device that is connected between the hydraulic pump and the steering device. And a low-pressure hose for returning oil pressure from the steering device side to the hydraulic pump side.
【0003】このようなユニットにおいて、油圧ポンプ
から吐出されて舵取装置側に供給される油圧には、油圧
ポンプによる脈動が生じることを避けることができず、
この脈動により高圧ホース、舵取装置が振動して異音が
発生するおそれがある。[0003] In such a unit, the hydraulic pressure discharged from the hydraulic pump and supplied to the steering device side cannot avoid generation of pulsation by the hydraulic pump,
This pulsation may cause the high pressure hose and the steering device to vibrate and generate abnormal noise.
【0004】この問題を解決するため、例えば米国特許
第3323305号公報に記載した発明に代表されるよ
うに、高圧ホース内にフレキシブル管を挿入した脈動圧
吸収ホースが知られている。In order to solve this problem, a pulsating pressure absorbing hose in which a flexible pipe is inserted into a high-pressure hose is known as represented by, for example, the invention described in US Pat. No. 3,323,305.
【0005】この脈動圧吸収ホースは、高圧ホースとフ
レキシブル管の隙間をアキュムレータ室とし、アキュム
レータ室から戻り反射した油の圧力波とフレキシブル管
内部を通り抜けた油の圧力波との干渉によって脈動を吸
収するものである。In this pulsation pressure absorbing hose, a gap between the high-pressure hose and the flexible pipe is used as an accumulator chamber, and the pulsation is absorbed by interference between a pressure wave of oil reflected from the accumulator chamber and a pressure wave of oil passing through the inside of the flexible pipe. Is what you do.
【0006】[0006]
【発明が解決しようとする課題】ところで、油圧ポンプ
により発生する脈動は、車種毎(パワーステアリングユ
ニットの形式毎)に周波数域が異なる。そのため、上述
した従来の脈動圧吸収ホースでは、高圧ホースの長さを
変えたり、高圧ホース内に1連或いは2連のフレキシブ
ル管を挿入したり、フレキシブル管に流れる油の流れ方
向を変えたり、或いはそれらの方法を組み合わせること
で所定の周波数域の脈動を吸収するようにしている。The pulsation generated by the hydraulic pump has a different frequency range for each vehicle type (for each type of power steering unit). Therefore, in the conventional pulsating pressure absorbing hose described above, the length of the high-pressure hose is changed, one or two flexible pipes are inserted into the high-pressure hose, the flow direction of oil flowing through the flexible pipe is changed, Alternatively, a pulsation in a predetermined frequency range is absorbed by combining these methods.
【0007】しかしながら、車種毎に対応可能となるよ
うに、高圧ホースの長さ、フレキシブル管の挿入本数な
どが異なる複数種類の脈動圧吸収ホースを製造すると、
製造コストが高騰してしまう。However, if a plurality of types of pulsating pressure absorbing hoses having different lengths of high-pressure hoses, the number of flexible tubes to be inserted, and the like are manufactured so as to be compatible with each vehicle type,
Manufacturing costs rise.
【0008】また、パワーステアリングユニット内のレ
イアウト上の制約から脈動圧吸収ホースの長さには限度
があり、長尺な脈動圧吸収ホースを製造して所定の周波
数域の脈動を吸収しようとしてもユニット内に組み込む
ことができず、脈動の吸収を十分に行うことができない
場合がある。In addition, the length of the pulsating pressure absorbing hose is limited due to the layout restrictions in the power steering unit, and even if a long pulsating pressure absorbing hose is manufactured to absorb pulsation in a predetermined frequency range. In some cases, the pulsation cannot be sufficiently absorbed because the pulsation cannot be incorporated into the unit.
【0009】さらには、高圧ホースが曲がると高圧ホー
ス内に挿入したフレキシブル管の先端がホース内周面に
接触し、高圧ホースの内周面が傷付きやすいという不都
合もある。Furthermore, when the high-pressure hose is bent, the tip of the flexible pipe inserted into the high-pressure hose comes into contact with the inner peripheral surface of the hose, and the inner peripheral surface of the high-pressure hose is easily damaged.
【0010】本発明はこれらの諸問題に鑑みて開発され
たものであり、低周波数域から高周波数域までの高範囲
の脈動を吸収することができ、しかも流体圧回路に組み
込む際のレイアウトの制約を受けない簡便な構成として
製造コストの低減化を図ることができるとともに、フレ
キシブル管の先端による高圧ホースの内周面の傷付きを
防止することもできる脈動圧吸収ホースを提供すること
を目的としている。The present invention has been developed in view of these problems, and can absorb pulsations in a high range from a low frequency range to a high frequency range. It is an object of the present invention to provide a pulsating pressure absorbing hose capable of reducing the manufacturing cost as a simple configuration free from restrictions and preventing the inner peripheral surface of the high pressure hose from being damaged by the end of the flexible tube. And
【0011】[0011]
【課題を解決するための手段】上記課題を解決するため
に、請求項1記載の脈動圧吸収ホースは、流体圧ポンプ
を圧力発生源とする流体圧回路中に配設され、前記流体
圧ポンプが発生する流体圧の脈動を吸収する脈動圧吸収
ホースであって、ホース本体の一端から途中までフレキ
シブル管を挿入し、前記フレキシブル管の外周と前記ホ
ース本体の内周面との間に流体溜まり空間を設けるとと
もに、前記流体溜まり空間に通じる流体通路に絞りを形
成する絞り調整部材を、前記フレキシブル管の先端部に
装着した。According to a first aspect of the present invention, there is provided a pulsating pressure absorbing hose provided in a fluid pressure circuit using a fluid pressure pump as a pressure source. A pulsating pressure absorbing hose for absorbing pulsation of fluid pressure generated by inserting a flexible pipe from one end of the hose body to a middle thereof, and having a fluid pool between an outer circumference of the flexible pipe and an inner circumferential surface of the hose body. A throttle adjusting member for providing a space and for forming a throttle in a fluid passage communicating with the fluid reservoir space is attached to a distal end portion of the flexible tube.
【0012】また、請求項2記載の発明は、請求項1記
載の脈動圧吸収ホースにおいて、前記ホース本体の内径
より小さな外径に設定した弾性体からなる筒形状の絞り
調整部材を前記フレキシブル管の先端に外嵌し、前記ホ
ース本体の内周面と前記絞り調整部材の外周面との間に
所定の隙間を設けた。According to a second aspect of the present invention, in the pulsating pressure absorbing hose according to the first aspect, a cylindrical throttle adjusting member made of an elastic body having an outer diameter smaller than the inner diameter of the hose body is used as the flexible pipe. And a predetermined gap is provided between the inner peripheral surface of the hose body and the outer peripheral surface of the throttle adjusting member.
【0013】また、請求項3記載の発明は、請求項1記
載の脈動圧吸収ホースにおいて、前記ホース本体の内径
と略同一寸法の外径を有し、軸中央部に嵌入孔を形成し
た筒形状の絞り調整部材を、前記嵌入孔に前記フレキシ
ブル管の先端を嵌入して装着するとともに、前記絞り調
整部材の軸方向に、前記流体溜まり空間に通じる細径孔
を形成した。According to a third aspect of the present invention, there is provided the pulsating pressure absorbing hose according to the first aspect, wherein the outer diameter of the hose is substantially the same as the inner diameter of the hose body, and a fitting hole is formed at the center of the shaft. A restricting member having a shape is fitted by fitting the tip of the flexible tube into the fitting hole, and a small-diameter hole communicating with the fluid reservoir space is formed in the axial direction of the restricting member.
【0014】また、請求項4記載の発明は、請求項3記
載の脈動圧吸収ホースにおいて、前記絞り調整部材の外
周に、この絞り調整部材の両端面間を連続する連通溝を
形成し、前記フレキシブル管の先端に装着したときに、
前記ホース本体の内周面と前記連通溝とで囲んだ空間
を、前記流体溜まり空間に通じる細径孔として設けるよ
うにした。According to a fourth aspect of the present invention, in the pulsating pressure absorbing hose according to the third aspect, a communication groove is formed on an outer periphery of the throttle adjusting member, the communication groove extending between both end surfaces of the throttle adjusting member. When attached to the end of the flexible tube,
A space surrounded by the inner peripheral surface of the hose body and the communication groove is provided as a small-diameter hole communicating with the fluid reservoir space.
【0015】また、請求項5記載の発明は、請求項3記
載の脈動圧吸収ホースにおいて、前記絞り調整部材の嵌
入孔の周面に、該絞り調整部材の両端面間を連続する連
通溝を形成し、前記フレキシブル管の先端に装着したと
きに、前記フレキシブル管の外周面と前記連通溝とで囲
んだ空間を、前記流体溜まり空間に通じる細径孔として
設けるようにした。According to a fifth aspect of the present invention, in the pulsating pressure absorbing hose according to the third aspect, a communication groove which is continuous between both end faces of the throttle adjusting member is formed on a peripheral surface of the fitting hole of the throttle adjusting member. When formed and mounted on the distal end of the flexible tube, a space surrounded by the outer peripheral surface of the flexible tube and the communication groove is provided as a small-diameter hole communicating with the fluid reservoir space.
【0016】また、請求項6記載の発明は、請求項1記
載の脈動圧吸収ホースにおいて、フレキシブル管の先端
に、当該フレキシブル管を形成する金属帯状体の螺旋巻
き形状を保持するキャップ部材を装着するとともに、当
該キャップ部材の外観形状を、曲率を有する外周面が前
記ホース本体の内周面に向かって膨出する拡径部を備え
た円錐台形状、ブリスタ形状等に形成した。According to a sixth aspect of the present invention, in the pulsating pressure absorbing hose according to the first aspect, a cap member for holding a spirally wound shape of a metal band forming the flexible tube is attached to a tip of the flexible tube. In addition, the outer shape of the cap member was formed into a truncated cone shape, a blister shape, or the like having an enlarged diameter portion having an outer peripheral surface having a curvature bulging toward the inner peripheral surface of the hose body.
【0017】また、請求項7記載の発明は、流体圧ポン
プを圧力発生源とする流体圧回路中に配設され、前記流
体圧ポンプが発生する流体圧の脈動を吸収する脈動圧吸
収ホースであって、2本のホース本体を中間かしめ部材
を介して互いに直列に連結し、一方のホース本体にフレ
キシブル管を挿入して当該フレキシブル管の外周と一方
のホース本体の内周面との間に流体溜まり空間を設け、
前記中間かしめ部材により前記フレキシブル管の先端を
支持するとともに、前記中間かしめ部材に、前記流体溜
まり空間と他方のホース本体内部との間を連通する細径
孔を形成した。According to a seventh aspect of the present invention, there is provided a pulsating pressure absorbing hose disposed in a fluid pressure circuit using a fluid pressure pump as a pressure generating source and absorbing a pulsation of fluid pressure generated by the fluid pressure pump. Then, the two hose bodies are connected to each other in series via an intermediate caulking member, and a flexible tube is inserted into one of the hose bodies so that the flexible tube is inserted between the outer periphery of the flexible tube and the inner peripheral surface of the one hose body. Provide a fluid pool space,
The intermediate caulking member supports the distal end of the flexible tube, and the intermediate caulking member has a small-diameter hole communicating between the fluid reservoir space and the inside of the other hose body.
【0018】さらに、請求項8記載の発明は、請求項7
記載の脈動圧吸収ホースにおいて、前記中間かしめ部材
に、前記細径孔の径を微調整することが可能な径調整部
材を一体に設けたことを特徴とする請求項7記載の脈動
圧吸収ホース。Further, the invention according to claim 8 is the same as the invention according to claim 7.
8. The pulsating pressure absorbing hose according to claim 7, wherein the intermediate caulking member is provided integrally with a diameter adjusting member capable of finely adjusting the diameter of the small diameter hole. .
【0019】[0019]
【発明の効果】本発明のうち請求項1記載の脈動圧吸収
ホースによると、フレキシブル管の外周とホース本体の
内周面との間に設けた流体溜まり空間は、流体圧ポンプ
で発生した所定周波数域の脈動を吸収することが可能な
アキュムレータ室となる。そして、フレキシブル管の先
端部に絞り調整部材を設けたことから、前記アキュムレ
ータの入口に絞りを設けた構造となる。これにより、流
体圧ポンプで脈動が発生すると、アキュムレータ室の入
口に設けた絞りを流体が通過する際の流体流れの制御に
よって所定の周波数域の脈動が吸収され、さらにアキュ
ムレータ室内で他の周波数領域の脈動が吸収される。According to the pulsating pressure absorbing hose of the first aspect of the present invention, the fluid reservoir space provided between the outer periphery of the flexible pipe and the inner peripheral surface of the hose body has a predetermined space generated by the fluid pressure pump. It becomes an accumulator room that can absorb pulsations in the frequency range. And since the diaphragm adjusting member is provided at the tip of the flexible tube, the structure is such that the diaphragm is provided at the entrance of the accumulator. Thus, when pulsation occurs in the fluid pressure pump, pulsation in a predetermined frequency range is absorbed by controlling the flow of fluid when the fluid passes through a restrictor provided at the inlet of the accumulator chamber, and the pulsation in another frequency range is further stored in the accumulator chamber. Pulsation is absorbed.
【0020】したがって、本発明の脈動圧吸収ホース
は、大容積のアキュムレータ室としなくても(即ち、流
体溜まり空間を大容積とするために長尺ホースとしなく
ても)、絞り調整部材の絞り効果によって十分に脈動を
吸収することができ、短尺な脈動圧吸収ホースとなるの
で、レイアウトの制約を受けずに流体圧回路中に容易に
組み込むことができる。Therefore, the pulsating pressure absorbing hose of the present invention does not require a large-volume accumulator chamber (that is, does not require a long hose to increase the volume of the fluid reservoir space), but does not restrict the throttle adjusting member. Pulsation can be sufficiently absorbed by the effect, and a short pulsation pressure absorbing hose can be obtained. Therefore, the hose can be easily incorporated in a fluid pressure circuit without being restricted by a layout.
【0021】また、請求項2記載の脈動圧吸収ホースに
よると、請求項1記載の効果を得るころができるととも
に、絞り調整部材の外径寸法を変更するとホース本体と
の隙間(絞り径)が変化し、吸収できる脈動の周波数域
を変更できるので、車種毎に外径寸法の異なる絞り調整
部材だけをフレキシブル管の先端部に装着すればよい。
したがって、従来のようにホース長さ、フレキシブル管
の挿入本数等が異なる複数種類の脈動圧ホースを製造し
なくて済むので、脈動圧吸収ホースの製造単価を下げる
ことができる。また、絞り調整部材は弾性体により形成
されているので、ホース本体が曲がって絞り調整部材が
ホース本体の内周面に接触しても、ホース内周面に傷が
付かない。According to the pulsating pressure absorbing hose of the second aspect, the effect of the first aspect can be obtained, and when the outer diameter of the throttle adjusting member is changed, the gap (diameter of the throttle) with the hose body is reduced. Since the frequency range of the pulsation that can be changed and absorbed can be changed, only a diaphragm adjusting member having an outer diameter different for each vehicle type needs to be attached to the distal end portion of the flexible pipe.
Therefore, it is not necessary to manufacture a plurality of types of pulsating pressure hoses having different hose lengths, the number of flexible tubes to be inserted, and the like as in the related art, so that the manufacturing unit price of the pulsating pressure absorbing hose can be reduced. Further, since the throttle adjusting member is formed of an elastic body, even if the hose main body is bent and the throttle adjusting member contacts the inner peripheral surface of the hose main body, the inner peripheral surface of the hose is not damaged.
【0022】また、請求項3記載の脈動圧吸収ホースに
よると、請求項1記載の効果を得るころができるととも
に、細径孔の数を増減し、或いは細径孔の孔径を変更す
ることによって吸収できる脈動の周波数域も変更でき、
車種毎に、細径孔の数、孔径の異なる絞り調整部材だけ
をフレキシブル管の先端部に装着すればよいので、脈動
圧吸収ホースの製造単価を下げることができる。According to the pulsating pressure absorbing hose of the third aspect, the effect of the first aspect can be obtained, and the number of small holes can be increased or decreased, or the diameter of the small holes can be changed. You can also change the frequency range of the pulsation that can be absorbed,
Since only the throttle adjusting member having a different number of small-diameter holes and a different hole diameter needs to be attached to the distal end portion of the flexible pipe for each vehicle type, the manufacturing cost of the pulsating pressure absorbing hose can be reduced.
【0023】また、請求項4記載の脈動圧吸収ホースに
よると、請求項3記載の効果を得ることができるととも
に、絞り調整部材の外周に連通溝を形成したことによっ
て、絞り調整部材の外周とホース本体の内周面との接触
面積が減少するので、スムーズに絞り調整部材をホース
本体内に挿入することができる。Further, according to the pulsation pressure absorbing hose of the fourth aspect, the effect of the third aspect can be obtained, and the communication groove is formed on the outer periphery of the throttle adjusting member. Since the area of contact with the inner peripheral surface of the hose body is reduced, the throttle adjusting member can be smoothly inserted into the hose body.
【0024】また、請求項5記載の脈動圧吸収ホースに
よると、請求項3記載の効果を得ることができるととも
に、嵌入孔の周面に連通溝を形成したことによって、絞
り調整部材とフレキシブル管の先端部との接触面積が減
少するので、容易に絞り調整部材をフレキシブル管の先
端部に装着することができる。According to the pulsating pressure absorbing hose of the fifth aspect, the effect of the third aspect can be obtained, and since the communication groove is formed in the peripheral surface of the fitting hole, the diaphragm adjusting member and the flexible pipe are formed. Since the contact area with the tip of the flexible pipe is reduced, the aperture adjusting member can be easily attached to the tip of the flexible tube.
【0025】また、請求項6記載の脈動圧吸収ホースに
よると、フレキシブル管の先端に、当該フレキシブル管
を形成する金属帯状体の螺旋巻き形状を保持するキャッ
プ部材を装着するとともに、当該キャップ部材の外観形
状を、曲率を有する外周面が前記ホース本体の内周面に
向かって膨出する拡径部を備えた円錐台形状、ブリスタ
形状等に形成したので、キャップ部材の拡径部の寸法を
変更するとホース本体との隙間(絞り径)が変化し、吸
収できる脈動の周波数域を変更できるので、車種毎に拡
径部の寸法が異なるキャップ部材だけをフレキシブル管
の先端部に装着すればよい。したがって、従来のように
ホース長さ、フレキシブル管の挿入本数等が異なる複数
種類の脈動圧ホースを製造しなくて済むので、脈動圧吸
収ホースの製造単価を下げることができる。また、キャ
ップ部材は曲率を有する外周面を備えているので、ホー
ス本体が曲がってキャップ部材がホース本体の内周面に
接触しても、ホース内周面に傷が付かない。According to the pulsating pressure absorbing hose of the sixth aspect, a cap member for holding the spirally wound shape of the metal strip forming the flexible tube is attached to the tip of the flexible tube, and the cap member is attached to the flexible tube. Since the outer shape is formed in a truncated cone shape, a blister shape, or the like having an enlarged diameter portion whose outer peripheral surface having a curvature swells toward the inner peripheral surface of the hose body, the size of the enlarged diameter portion of the cap member is reduced. If this is changed, the gap (diaphragm diameter) with the hose body changes, and the frequency range of the pulsation that can be absorbed can be changed. Therefore, only the cap member having a different diameter of the enlarged portion for each vehicle type needs to be attached to the tip of the flexible pipe. . Therefore, it is not necessary to manufacture a plurality of types of pulsating pressure hoses having different hose lengths, the number of flexible tubes to be inserted, and the like as in the related art, so that the manufacturing unit price of the pulsating pressure absorbing hose can be reduced. Further, since the cap member has the outer peripheral surface having a curvature, even if the hose body is bent and the cap member contacts the inner peripheral surface of the hose main body, the inner peripheral surface of the hose is not damaged.
【0026】また、請求項7記載の脈動圧吸収ホースに
よると、中間かしめ部材に形成した細径孔が、流体溜ま
り空間(アキュムレータ室)に通じる流体通路に設けた
絞りとなる。これにより、流体圧ポンプで脈動が発生す
ると、絞りを流体が通過する際の流体流れの制御によっ
て所定の周波数域の脈動が吸収され、さらにアキュムレ
ータ室内で他の周波数領域の脈動が吸収されるので、請
求項1と同様の効果を得ることができる。また、中間か
しめ部材は、2本のホース本体の連結と同時に、絞り調
整部材として機能するので、さらに脈動圧吸収ホースの
製造単価を下げることができる。According to the pulsating pressure absorbing hose of the present invention, the small-diameter hole formed in the intermediate caulking member serves as a throttle provided in the fluid passage communicating with the fluid reservoir space (accumulator chamber). Accordingly, when a pulsation occurs in the fluid pressure pump, the pulsation in a predetermined frequency range is absorbed by controlling the fluid flow when the fluid passes through the throttle, and the pulsation in another frequency range is absorbed in the accumulator chamber. Therefore, the same effect as that of the first aspect can be obtained. Further, since the intermediate caulking member functions as a throttle adjusting member at the same time as the connection of the two hose bodies, the manufacturing cost of the pulsating pressure absorbing hose can be further reduced.
【0027】さらに、請求項8記載の脈動圧吸収ホース
によると、請求項7記載の効果を得ることができるとと
もに、流体圧回路中に組み込んだ後でも、吸収すべき脈
動の周波数域を容易に変更することができる。Further, according to the pulsation pressure absorbing hose of the eighth aspect, the effect of the seventh aspect can be obtained, and the frequency range of the pulsation to be absorbed can be easily set even after being incorporated in the fluid pressure circuit. Can be changed.
【0028】[0028]
【発明の実施形態】以下、本発明の実施形態を図面に基
づいて説明する。図1から図3は、本発明に係わる第1
実施形態の脈動圧吸収ホースを示す図である。Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment according to the present invention.
It is a figure showing a pulsation pressure absorption hose of an embodiment.
【0029】先ず構成を説明すると、この脈動圧吸収ホ
ースの両端には、ホース本体2の両端開口部に内嵌した
ニップル4と、ホース本体2の端部外周を締め付けてい
る締め付けリング6と、ニップル4に回転自在に係合し
ているナット8とからなる接続金具10が連結してい
る。そして、図1の左側に示した接続金具10に油圧ポ
ンプ(図示せず)の吐出口が接続し、矢印方向に油が流
れるようになっている。First, the structure will be described. At both ends of the pulsating pressure absorbing hose, a nipple 4 fitted inside both ends of the hose body 2 and a fastening ring 6 for fastening the outer periphery of the end of the hose body 2 are provided. A connection fitting 10 including a nut 8 rotatably engaged with the nipple 4 is connected. A discharge port of a hydraulic pump (not shown) is connected to the connection fitting 10 shown on the left side of FIG. 1 so that oil flows in the direction of the arrow.
【0030】そして、ホース本体2内には、フレキシブ
ル管12が同軸に遊挿されており、このフレキシブル管
12の外周とホース内周面2aとの間に油溜まり空間2
0が画成されている。A flexible pipe 12 is inserted coaxially into the hose body 2 and an oil sump space 2 is provided between the outer circumference of the flexible pipe 12 and the inner circumferential surface 2a of the hose.
0 is defined.
【0031】前記フレキシブル管12は、金属帯状体を
螺旋巻きしてなる管部材であり、その一端部は図1の左
側に位置するニップル4に内嵌しており、自由端とした
他端部には、金属帯状体の螺旋巻き形状を保持するキャ
ップ部材14が取付けられている。なお、符号14a
は、油の吐出口14aである。そして、このキャップ部
材14の外周には、ホース本体2の内径より小さな外径
とされ、弾性体により形成した円筒部材16が外嵌され
ている。The flexible tube 12 is a tube member formed by spirally winding a metal strip. One end of the flexible tube 12 is fitted in the nipple 4 located on the left side of FIG. , A cap member 14 for holding a spirally wound metal band is attached. Reference numeral 14a
Is an oil discharge port 14a. A cylindrical member 16 having an outer diameter smaller than the inner diameter of the hose body 2 and formed of an elastic body is fitted around the outer periphery of the cap member 14.
【0032】次に、図4は、上記構成の脈動圧吸収ホー
スと等価のモデル示すものであるが、前述したようにフ
レキシブル管12の外周面とホース本体2の内周面との
間に画成されている油溜まり空間20は油圧ポンプで発
生した所定周波数域の脈動を吸収することができるの
で、アキュムレータ室となる(以下、アキュムレータ室
20と称する。)。また、フレキシブル管12の先端部
は、キャップ部材14に外嵌した円筒部材16の外周に
よってホース内周面2aとの間の油通路が狭く設定され
るので、アキュムレータ室20の入口に、符号Tで示す
絞りが設けられた構造となる。そして、外径が大きな円
筒部材16をキャップ部材14に外嵌すると、絞りTの
絞り径が小さくなり、外径が小さな円筒部材16をキャ
ップ部材14に外嵌すると、絞りTの絞り径が大きくな
るので、円筒部材16は絞り調整部材として機能する
(以下、絞り調整部材16と称する)。Next, FIG. 4 shows a model equivalent to the pulsating pressure absorbing hose having the above-described configuration. As described above, the space between the outer peripheral surface of the flexible pipe 12 and the inner peripheral surface of the hose body 2 is defined. The formed oil sump space 20 can absorb the pulsation in a predetermined frequency range generated by the hydraulic pump, and thus serves as an accumulator chamber (hereinafter, referred to as the accumulator chamber 20). The distal end of the flexible tube 12 has a narrow oil passage between the inner peripheral surface 2a of the hose and the outer peripheral surface of the cylindrical member 16 fitted to the cap member 14. The structure shown in FIG. When the cylindrical member 16 having a large outer diameter is externally fitted to the cap member 14, the aperture diameter of the aperture T is reduced. When the cylindrical member 16 having a small outer diameter is externally fitted to the cap member 14, the aperture diameter of the aperture T is increased. Therefore, the cylindrical member 16 functions as a diaphragm adjusting member (hereinafter, referred to as the diaphragm adjusting member 16).
【0033】本実施形態の脈動圧吸収ホースを自動車の
パワーステアリングユニットの高圧ホースとして使用す
ると、油圧ポンプで脈動が発生した場合、アキュムレー
タ室20の入口に設けた絞りTを油が通過する際の油流
量制御によって所定の周波数域の脈動を吸収し、さらに
アキュムレータ室20内で他の周波数域の脈動を吸収す
ることができる。When the pulsation pressure absorbing hose of this embodiment is used as a high-pressure hose of a power steering unit of an automobile, when pulsation is generated by a hydraulic pump, the pulsating pressure absorption hose is used when oil passes through a throttle T provided at an inlet of the accumulator chamber 20. The pulsation in a predetermined frequency range can be absorbed by the oil flow control, and the pulsation in another frequency range can be absorbed in the accumulator chamber 20.
【0034】このため、大容積のアキュムレータ室20
としなくても(フレキシブル管12とホース本体2との
間の油溜まり空間20を大容積としなくても)、絞りT
によって十分に脈動を吸収することができるので短尺管
としたコンパクトな脈動圧吸収ホースとなる。したがっ
て、パワーステアリングユニット内に組み込む際に、レ
イアウト上の制約を受けずに簡単に装着することができ
る。For this reason, the large-volume accumulator chamber 20
(Even if the oil storage space 20 between the flexible pipe 12 and the hose body 2 does not have a large volume)
As a result, the pulsation can be sufficiently absorbed, so that a compact pulsation pressure absorbing hose having a short length can be obtained. Therefore, when the power steering unit is incorporated in the power steering unit, the power steering unit can be easily mounted without being restricted by the layout.
【0035】また、絞り調整部材16の外径寸法を変更
すると絞りTの絞り径が変化し、絞りTが吸収できる脈
動の周波数域も変化するので、車種毎に脈動の周波数域
が異なる場合には、車種毎に外径寸法の異なる絞り調整
部材16だけをキャップ部材14に外嵌すればよい。し
たがって、従来のようにホース長さ、フレキシブル管1
2の挿入本数等が異なる複数種類の脈動圧吸収ホースを
製造しなくて済むので、脈動圧吸収ホースの製造単価を
下げることができる。Further, when the outer diameter of the aperture adjusting member 16 is changed, the aperture diameter of the aperture T changes, and the frequency range of pulsation that can be absorbed by the aperture T also changes. In this case, only the aperture adjusting member 16 having a different outer diameter for each vehicle type needs to be fitted to the cap member 14. Therefore, the hose length and the flexible pipe 1
Since it is not necessary to manufacture a plurality of kinds of pulsating pressure absorbing hoses having different numbers of insertions of 2, etc., the manufacturing unit price of the pulsating pressure absorbing hose can be reduced.
【0036】さらに、ホース本体2が曲がってフレキシ
ブル管12の先端がホース内周面2aに接触しても、フ
レキシブル管12の先端には弾性体により形成した絞り
調整部材16が装着されているので、ホース内周面2a
には傷が付かない。Further, even if the hose body 2 is bent and the tip of the flexible tube 12 comes into contact with the inner peripheral surface 2a of the hose, the diaphragm adjusting member 16 formed of an elastic body is attached to the tip of the flexible tube 12. , Hose inner peripheral surface 2a
Is not scratched.
【0037】次に、図5及び図6に示すものは、本発明
の第2実施形態を示すものである。なお、図1から図4
で示した第1実施形態と同一構成部分には、同一符号を
付してその説明を省略する。Next, FIGS. 5 and 6 show a second embodiment of the present invention. 1 to 4
The same reference numerals are given to the same components as those of the first embodiment shown in FIG.
【0038】本実施形態は、第1実施形態の絞り調整部
材16に替えて、絞り調整部材30がキャップ部材14
に外嵌されている。この絞り調整部材30は、キャップ
部材14に外嵌する嵌合孔32を軸中央部に形成し、外
径をホース本体2の内径と略同一寸法に設定した弾性体
からなる円筒部材であり、アキュムレータ室20を閉塞
するようにホース本体2内に配設されている。そして、
この絞り調整部材30には、アキュムレータ室20側を
向く一方の端面34aから他方の端面34bまで連通す
る連通孔36が複数形成されている。In the present embodiment, the aperture adjusting member 30 is replaced with the cap member 14 instead of the aperture adjusting member 16 of the first embodiment.
Is fitted outside. The aperture adjusting member 30 is a cylindrical member made of an elastic body having a fitting hole 32 that is fitted to the cap member 14 at the center of the shaft and having an outer diameter set to be substantially the same as the inner diameter of the hose body 2. The accumulator chamber 20 is disposed inside the hose body 2 so as to close the accumulator chamber 20. And
The aperture adjusting member 30 has a plurality of communication holes 36 communicating from one end face 34a facing the accumulator chamber 20 to the other end face 34b.
【0039】上記構成の脈動圧吸収ホースによると、絞
り調整部材30に形成した複数の連通孔36が絞り孔と
なって絞りTを構成するので、油圧ポンプで脈動が発生
した場合、絞り孔(連通孔)36を油が通過する際の流
量制御によって所定の周波数域の脈動を吸収し、さらに
アキュムレータ室20内で他の周波数域の脈動を吸収す
ることができる。According to the pulsating pressure absorbing hose having the above-described structure, the plurality of communication holes 36 formed in the throttle adjusting member 30 serve as throttle holes to form the throttle T. Therefore, when pulsation is generated by the hydraulic pump, the throttle hole ( The pulsation in a predetermined frequency range can be absorbed by the flow rate control when the oil passes through the communication hole 36, and the pulsation in another frequency range can be absorbed in the accumulator chamber 20.
【0040】このため、第1実施形態と同様に大容積の
アキュムレータ室20としなくても絞りTによって十分
に脈動を吸収することができるので短尺管としたコンパ
クトな脈動圧吸収ホースとなり、パワーステアリングユ
ニット内に組み込む際に、レイアウト上の制約を受けず
に簡単に装着することができる。Therefore, similarly to the first embodiment, the pulsation can be sufficiently absorbed by the throttle T without using the accumulator chamber 20 having a large volume, so that a compact pulsation pressure absorbing hose having a short length can be obtained. When incorporated in a unit, it can be easily mounted without any restrictions on layout.
【0041】また、絞り調整部材30の連通孔36の数
を変更したり、連通孔36の径寸法を変更すると、絞り
Tが吸収できる脈動の周波数域も変化するので、車種毎
に連通孔36の数や径寸法の異なった絞り調整部材30
だけをキャップ部材14に外嵌すればよいので、脈動圧
吸収ホースの製造単価を下げることができる。When the number of the communication holes 36 of the aperture adjustment member 30 is changed or the diameter of the communication holes 36 is changed, the frequency range of the pulsation that can be absorbed by the aperture T also changes. Aperture adjusting members 30 having different numbers and diameters
Of the pulsating pressure absorbing hose can be reduced because only the outer peripheral portion of the pulsating pressure absorbing hose needs to be fitted to the cap member 14.
【0042】さらに、絞り調整部材30の外周がホース
内周面2aに接触しているので、ホース内周面2aが傷
付くおそれがない。次に、図7及び図8に示すものは、
本発明の第3実施形態を示すものである。Further, since the outer periphery of the throttle adjusting member 30 is in contact with the inner peripheral surface 2a of the hose, there is no possibility that the inner peripheral surface 2a of the hose is damaged. Next, what is shown in FIG. 7 and FIG.
9 shows a third embodiment of the present invention.
【0043】本実施形態は、キャップ部材14に絞り調
整部材40を外嵌している。この絞り調整部材40は、
キャップ部材14が内嵌する嵌入孔42を軸中央部に形
成し、外径をホース本体2の内径と略同一寸法に設定し
た弾性体からなる円筒部材であり、アキュムレータ室2
0を閉塞するようにホース本体2内に配設されている。
そして、この絞り調整部材40の外周には、アキュムレ
ータ室20側を向く一方の端面44aから他方の端面4
4bまで連続する連通溝46が複数形成されている。In the present embodiment, the aperture adjusting member 40 is externally fitted to the cap member 14. This aperture adjustment member 40 is
A cylindrical member made of an elastic body having a fitting hole 42 in which the cap member 14 is fitted in the center of the shaft and having an outer diameter set to be substantially the same as the inner diameter of the hose body 2.
0 is disposed in the hose main body 2 so as to close it.
The outer periphery of the aperture adjusting member 40 is connected from one end surface 44a facing the accumulator chamber 20 side to the other end surface 4a.
A plurality of communication grooves 46 continuous to 4b are formed.
【0044】上記構成の脈動圧吸収ホースによると、絞
り調整部材40に形成した複数の連通溝46とホース内
周面2aとで囲んだ空間を絞り孔として絞りTを構成す
るので、油圧ポンプで脈動が発生した場合、絞り孔を油
が通過する際の流量制御によって所定の周波数域の脈動
を吸収し、さらにアキュムレータ室20内で他の周波数
域の脈動を吸収することができる。According to the pulsating pressure absorbing hose having the above structure, the throttle T is formed as a throttle hole in a space surrounded by the plurality of communication grooves 46 formed in the throttle adjusting member 40 and the inner circumferential surface 2a of the hose. When pulsation occurs, pulsation in a predetermined frequency range can be absorbed by flow rate control when oil passes through the throttle hole, and pulsation in another frequency range can be absorbed in the accumulator chamber 20.
【0045】このため、第2実施形態と同様の作用効果
を得ることができる。また、絞り調整部材40の外周に
連通溝46を形成したことによってホース内周面2aと
の接触面積が減少するので、キャップ部材12の先端に
装着した絞り調整部材40をホース本体2内に挿入する
際には、スムーズに絞り調整部材40を挿入することが
できる。Therefore, the same operation and effect as in the second embodiment can be obtained. Also, since the communication groove 46 is formed on the outer periphery of the throttle adjusting member 40, the contact area with the inner circumferential surface 2a of the hose is reduced, so that the throttle adjusting member 40 attached to the tip of the cap member 12 is inserted into the hose body 2. When doing so, the aperture adjustment member 40 can be inserted smoothly.
【0046】次に、図9及び図10に示すものは、本発
明の第4実施形態を示すものである。本実施形態は、キ
ャップ部材14に絞り調整部材50を外嵌している。Next, FIGS. 9 and 10 show a fourth embodiment of the present invention. In the present embodiment, the aperture adjustment member 50 is externally fitted to the cap member 14.
【0047】この絞り調整部材50は、キャップ部材1
4に外嵌する嵌合孔52を軸中央部に形成し、外径をホ
ース本体2の内径と略同一寸法に設定した弾性体からな
る円筒部材であり、アキュムレータ室20を閉塞するよ
うにホース本体2内に配設されている。そして、この絞
り調整部材50の嵌合孔52には、アキュムレータ室2
0側を向く一方の端面54aから他方の端面44bまで
連続する連通溝56が複数形成されている。The aperture adjusting member 50 is a cap member 1
4 is a cylindrical member made of an elastic body having an outer diameter set to be approximately the same as the inner diameter of the hose body 2 and having a fitting hole 52 formed at the center of the shaft, the hose being adapted to close the accumulator chamber 20. It is arranged in the main body 2. The fitting hole 52 of the aperture adjusting member 50 is provided in the accumulator chamber 2.
A plurality of continuous communication grooves 56 are formed from one end face 54a facing the zero side to the other end face 44b.
【0048】上記構成の脈動圧吸収ホースによると、絞
り調整部材50に形成した複数の連通溝56とキャップ
部材14とで囲んだ空間を絞り孔として絞りTを構成す
るので、油圧ポンプで脈動が発生した場合、絞り孔を油
が通過する際の流量制御によって所定の周波数域の脈動
を吸収し、さらにアキュムレータ室20内で他の周波数
域の脈動を吸収することができる。According to the pulsating pressure absorbing hose having the above-described structure, the throttle T is formed by using the space surrounded by the plurality of communication grooves 56 formed in the throttle adjusting member 50 and the cap member 14 as the throttle hole, so that the pulsation is generated by the hydraulic pump. When this occurs, the pulsation in a predetermined frequency range can be absorbed by the flow rate control when the oil passes through the throttle hole, and the pulsation in another frequency range can be absorbed in the accumulator chamber 20.
【0049】このため、第2実施形態と同様の作用効果
を得ることができる。また、絞り調整部材50の嵌合孔
52に連通溝56を形成したことによってキャップ部材
14との接触面積が減少するので、絞り調整部材50を
容易にキャップ部材14に装着することができる。Therefore, the same operation and effect as in the second embodiment can be obtained. Further, since the communication groove 56 is formed in the fitting hole 52 of the aperture adjustment member 50, the contact area with the cap member 14 is reduced, so that the aperture adjustment member 50 can be easily mounted on the cap member 14.
【0050】次に、図11及び図12に示すものは、本
発明の第5実施形態を示すものであり、この実施形態は
キャップ部材60が絞り調整部材として機能するもので
ある。Next, FIGS. 11 and 12 show a fifth embodiment of the present invention, in which the cap member 60 functions as a diaphragm adjusting member.
【0051】すなわち、本実施形態のキャップ部材60
は、貫通孔62を設けた金属部材であり、円錐台状の外
観を有している。そして、貫通孔62の一端側開口部は
フレキシブル管12を内嵌して金属帯状体の螺旋巻き形
状を保持しており、貫通孔62の他端側開口部が油の吐
出口64となっている。That is, the cap member 60 of the present embodiment
Is a metal member provided with a through-hole 62 and has a truncated cone-like appearance. The opening on one end side of the through hole 62 holds the flexible tube 12 in a spirally wound shape of the metal band, and the opening on the other end side of the through hole 62 serves as an oil discharge port 64. I have.
【0052】上記構成によると、フレキシブル管12の
先端部は、ホース内周面2aに近接しているキャップ部
材60の拡径部側の外周(図12の符号66で示す位
置)とホース内周面2aとの間の油通路が狭く設定され
ているので、アキュムレータ室20の入口に絞りTを設
けた構造となる。According to the above configuration, the distal end of the flexible tube 12 is connected to the outer periphery (the position indicated by reference numeral 66 in FIG. 12) of the cap member 60 which is close to the inner peripheral surface 2a of the cap member 60. Since the oil passage between the surface 2a is set to be narrow, a structure in which the throttle T is provided at the inlet of the accumulator chamber 20 is provided.
【0053】これにより、キャップ部材60の外周によ
って形成した絞りTによって十分に脈動を吸収すること
ができるので脈動圧吸収ホースを短尺管とすることがで
き、パワーステアリングユニット内に組み込む際に、レ
イアウト上の制約を受けずに簡単に装着することができ
る。As a result, the pulsation can be sufficiently absorbed by the throttle T formed by the outer periphery of the cap member 60, so that the pulsation pressure absorbing hose can be formed into a short tube. It can be easily mounted without the above restrictions.
【0054】また、キャップ部材60の拡径部側の外径
寸法を変更すると絞りTの絞り径が変化し、絞りTが吸
収できる脈動の周波数域も変化するので、車種毎に脈動
の周波数域が異なる場合には、車種毎に拡径部側の外径
寸法の異なるキャップ部材60だけをフレキシブル管1
2に取り付ければよいので、脈動圧吸収ホースの製造単
価を下げることができる。Also, if the outer diameter of the enlarged diameter portion side of the cap member 60 is changed, the aperture diameter of the aperture T changes, and the frequency range of pulsation that can be absorbed by the aperture T also changes. Are different from each other, only the cap members 60 having different outer diameters on the enlarged-diameter portion side for each vehicle type are connected to the flexible pipe 1.
2, it is possible to reduce the manufacturing unit price of the pulsating pressure absorbing hose.
【0055】さらに、ホース本体2が曲がってキャップ
部材60がホース内周面2aに接触しても、外観を円錐
台状に形成したキャップ部材60はホース内周面2aに
線接触状態で接触するので、ホース内周面2aには傷が
付かない。Further, even when the hose body 2 is bent and the cap member 60 comes into contact with the inner peripheral surface 2a of the hose, the cap member 60 having an external truncated cone shape comes into contact with the inner peripheral surface 2a of the hose in a line contact state. Therefore, the inner surface 2a of the hose is not damaged.
【0056】なお、絞り調整部材の機能を有するキャッ
プ部材は、上述した実施形態に限らず、例えば図13に
示すように、ホース内周面2a側に膨出したブリスタ管
66をキャップ部材として使用しても、第5実施形態と
同様の作用効果を得ることができる。The cap member having the function of the aperture adjusting member is not limited to the above-described embodiment. For example, as shown in FIG. 13, a blister tube 66 protruding toward the hose inner peripheral surface 2a is used as the cap member. Even in this case, the same operation and effect as in the fifth embodiment can be obtained.
【0057】次に、図14及び図15に示すものは、第
6実施形態の脈動圧吸収ホースを示すものであり、この
脈動圧吸収ホースは、中間かしめ部材74により2本の
ホース本体72A、72Bが直列に連結されているとと
もに、一方のホース本体72A内に遊挿いたフレキシブ
ル管12の先端部は前記中間かしめ部材74により固定
されている。FIGS. 14 and 15 show a pulsating pressure absorbing hose according to a sixth embodiment. This pulsating pressure absorbing hose is constituted by two hose bodies 72A, 72B are connected in series, and the distal end of the flexible tube 12 loosely inserted into one of the hose bodies 72A is fixed by the intermediate caulking member 74.
【0058】前記中間かしめ部材70は、図15に示す
ように、円筒形状の金属部材であり、軸方向の両端部の
外周側に2本のホース本体72A、72Bの端部をかし
め固定するかしめ部74a、74bが形成され、軸中央
部にフレキシブル管12の先端が内嵌する嵌入孔76が
形成されている。そして、この中間かしめ部材70に
は、一方のホース本体72A内に設けたアキュムレータ
室20を向く一方の端面78aから他方の端面78bま
で連通する連通孔80が複数形成されており、この中間
かしめ部材70は、絞り調整部材としても機能する。As shown in FIG. 15, the intermediate caulking member 70 is a cylindrical metal member, and caulks for caulking and fixing the ends of the two hose bodies 72A and 72B to the outer peripheral sides of both ends in the axial direction. Portions 74a and 74b are formed, and a fitting hole 76 in which the tip of the flexible tube 12 fits is formed in the center of the shaft. The intermediate caulking member 70 has a plurality of communication holes 80 communicating from one end face 78a facing the accumulator chamber 20 provided in the one hose body 72A to the other end face 78b. 70 also functions as a diaphragm adjustment member.
【0059】上記構成の脈動圧吸収ホースによると、中
間かしめ部材60に形成した複数の連通孔80が絞り孔
となって絞りTを構成するので、油圧ポンプで脈動が発
生した場合、絞り孔(連通孔)80を油が通過する際の
流量制御によって所定の周波数域の脈動を吸収し、さら
にアキュムレータ室20内で他の周波数域の脈動を吸収
することができる。According to the pulsating pressure absorbing hose having the above-described structure, the plurality of communication holes 80 formed in the intermediate caulking member 60 serve as throttle holes to form the throttle T. Therefore, when pulsation is generated by the hydraulic pump, the throttle hole ( The pulsation in a predetermined frequency range can be absorbed by the flow rate control when the oil passes through the communication hole (80), and the pulsation in another frequency range can be absorbed in the accumulator chamber 20.
【0060】このため、他の実施形態と同様の作用効果
を得ることができる。また、中間かしめ部材70は、2
本のホース本体72A、72Bの連結と同時に、絞り調
整部材としても機能するので、さらに脈動圧吸収ホース
の製造単価を下げることが可能となる。Therefore, the same operation and effect as those of the other embodiments can be obtained. Also, the intermediate caulking member 70
At the same time as the connection of the hose bodies 72A and 72B, they also function as a throttle adjusting member, so that the unit cost of manufacturing the pulsating pressure absorbing hose can be further reduced.
【0061】次に、図16に示すものは、第7実施形態
の脈動圧吸収ホースを示すものであり、中間かしめ部材
90の軸方向の両端部の外周側に形成したかしめ部92
a、92bにより2本のホース本体72A、72Bを直
列に連結しているとともに、中間かしめ部材90の軸中
央部に形成した嵌入孔94に、一方のホース本体72A
内に遊挿したフレキシブル管12の先端部が固定されて
いる。そして、中間かしめ部材90には、一方のホース
本体72A内に設けたアキュムレータ室20を向く一方
の端面96aから他方の端面96bまで連通する連通孔
98が形成されている。FIG. 16 shows a pulsation pressure absorbing hose according to a seventh embodiment, in which a caulking portion 92 formed on the outer peripheral side of both ends in the axial direction of the intermediate caulking member 90 is shown.
The two hose bodies 72A, 72B are connected in series by a and 92b, and one of the hose bodies 72A is inserted into a fitting hole 94 formed in the center of the shaft of the intermediate caulking member 90.
The distal end portion of the flexible tube 12 loosely inserted therein is fixed. The intermediate caulking member 90 is formed with a communication hole 98 communicating from one end face 96a facing the accumulator chamber 20 provided in one hose body 72A to the other end face 96b.
【0062】ここで、本実施形態では、中間かしめ部材
80の外周に大径穴100が形成されているとともに、
この大径穴100の底部から連通孔98に向けて雌ねじ
孔102が形成されている。そして、雌ねじ孔102に
は、連通孔98の内部に向かって進入可能な雄ねじプラ
グ104が螺合している。なお、符号106は、雌ねじ
孔92及び雄ねじプラグ94間の液密を保持するOリン
グである。Here, in the present embodiment, the large diameter hole 100 is formed on the outer periphery of the intermediate caulking member 80,
A female screw hole 102 is formed from the bottom of the large diameter hole 100 to the communication hole 98. A male screw plug 104 that can enter the inside of the communication hole 98 is screwed into the female screw hole 102. Reference numeral 106 denotes an O-ring for maintaining liquid tightness between the female screw hole 92 and the male screw plug 94.
【0063】上記構成の脈動圧吸収ホースによると、連
通孔98内への雄ねじプラグ104の進入量を増大させ
ると絞り径が小さな絞りTとなり、連通孔98内への雄
ねじプラグ104の進入量を減少させると、絞り径が大
きな絞りTとなる。According to the pulsating pressure absorbing hose having the above-described structure, when the amount of entry of the male screw plug 104 into the communication hole 98 is increased, the diameter of the throttle becomes a small throttle T, and the amount of entry of the male screw plug 104 into the communication hole 98 is reduced. When it is decreased, the aperture T becomes a large aperture diameter.
【0064】このように、本実施形態の脈動圧吸収ホー
スは、他の実施形態と同様の作用効果を得ることができ
るとともに、雄ねじプラグ104の進入量を操作するだ
けで絞りTの絞り径を微調整することができるので、パ
ワーステアリングユニットに組み込んだ後でも、吸収す
べき脈動の周波数域を容易に変更することができる。As described above, the pulsating pressure absorbing hose of the present embodiment can obtain the same operation and effect as those of the other embodiments, and can reduce the diameter of the throttle T by merely operating the amount of the male screw plug 104 to enter. Since the fine adjustment can be performed, the frequency range of the pulsation to be absorbed can be easily changed even after being incorporated in the power steering unit.
【0065】次に、図17から図19に示すものは、前
述した第6及び第7実施形態と同様に、2本のホース本
体72A、72Bを直列に連結した第8実施形態の脈動
圧吸収ホースを示すものである。FIGS. 17 to 19 show a pulsation pressure absorbing device according to an eighth embodiment in which two hose bodies 72A and 72B are connected in series, similarly to the sixth and seventh embodiments described above. It shows a hose.
【0066】本実施形態の脈動圧吸収ホースは、一方の
ホース本体72Aの端部と連結しながらフレキシブル管
12の先端部を固定する第1中間かしめ部材110と、
他方のホース本体72Bの端部と連結する第2中間かし
め部材112と、第1及び第2中間かしめ部材110、
112間に配設された第3中間かしめ部材114と、第
3中間かしめ部材114内に配設されて絞り径を調整す
る絞り調整部材116とを備えている。The pulsating pressure absorbing hose of the present embodiment comprises a first intermediate caulking member 110 for fixing the distal end of the flexible tube 12 while being connected to the end of one hose body 72A,
A second intermediate caulking member 112 connected to the end of the other hose body 72B, a first and a second intermediate caulking member 110,
A third intermediate caulking member 114 is provided between the first and second intermediate caulking members 112, and a diaphragm adjusting member 116 is provided in the third intermediate caulking member 114 and adjusts a diaphragm diameter.
【0067】すなわち、前記第1中間かしめ部材110
は、軸中央部にフレキシブル管12の先端が内嵌する嵌
入孔110aを形成した円筒部110bと、円筒部11
0bの軸方向一端側から拡径して外周を6角形状に形成
した拡径部110cと、拡径部110cの円筒部110
bと対向しない端面に形成されて一方のホース本体72
Aの端部をかしめ固定しているかしめ部110dと、拡
径部110cの円筒部110b側を向く端面に形成した
環状の収納溝内に装着したOリング110eと、円筒部
110bの外周に軸方向に延びて形成されて拡径部11
0cから離間するに従い溝深さが増大しているテーパ状
の三角溝110fと、前記拡径部110cのアクチュエ
ータ室20側に対向している面から前記三角溝110f
側に対向している面まで連通する連通孔110gとを備
えた部材である。That is, the first intermediate caulking member 110
A cylindrical portion 110b having a fitting hole 110a at the center of the shaft into which the tip of the flexible tube 12 is fitted;
A diameter-enlarging portion 110c whose diameter is increased from one end in the axial direction of 0b to form a hexagonal outer periphery, and a cylindrical portion 110 of the diameter-enlarging portion 110c
b formed on the end face that does not face
A caulking portion 110d for caulking and fixing an end portion of A, an O-ring 110e mounted in an annular storage groove formed on an end surface of the enlarged diameter portion 110c facing the cylindrical portion 110b side, and a shaft on the outer periphery of the cylindrical portion 110b The enlarged diameter portion 11 is formed so as to extend in the direction.
0c, and the tapered triangular groove 110f whose groove depth increases as the distance from 0c increases, and the triangular groove 110f extends from the surface of the enlarged diameter portion 110c facing the actuator chamber 20 side.
And a communication hole 110g communicating with the surface facing the side.
【0068】また、第2中間かしめ部材112は外周を
6角形状に形成した筒状部材であり、他方のホース本体
72Bの端部をかしめ固定するかしめ部112aと、前
記円筒部110bの先端に形成した雄ねじ部110gに
螺合する雌ねじ孔112bと、第3中間かしめ部材11
4側を向く端面に形成した環状の収納溝内に装着したO
リング112cと、第3中間かしめ部材114側を向く
端面から逆側の端面まで連通する連通孔112dとを備
えた部材である。The second intermediate caulking member 112 is a cylindrical member having an outer periphery formed in a hexagonal shape. A female screw hole 112b screwed into the formed male screw portion 110g, and a third intermediate caulking member 11
O mounted in an annular storage groove formed on the end face facing the four sides
This is a member including a ring 112c and a communication hole 112d communicating from the end face facing the third intermediate caulking member 114 side to the opposite end face.
【0069】また、第3中間かしめ部材114は、第1
中間かしめ部材110の内筒部110bより大径の寸法
とした内周面に雌ねじ114aを形成した円筒部材であ
る。さらに、絞り調整部材116は、第3かしめ部材1
14より軸方向の長さが短い円筒部材であり、第1中間
かしめ部材110の内筒部110bと略同径の内径部を
有しているとともに、第3中間かしめ部材114の雌ね
じ114aに螺合する雄ねじ116aを外周に形成して
いる。The third intermediate caulking member 114 is
The intermediate caulking member 110 is a cylindrical member having a female screw 114a formed on an inner peripheral surface having a larger diameter than the inner cylindrical portion 110b. Further, the aperture adjusting member 116 is a third caulking member 1
14 is a cylindrical member having a length in the axial direction shorter than that of the first intermediate caulking member 110, and has an inner diameter portion substantially the same diameter as the inner cylindrical portion 110b of the first intermediate caulking member 110. A mating male screw 116a is formed on the outer periphery.
【0070】上記構成の脈動圧吸収ホースによると、第
1中間かしめ部材110に形成した連通孔110gと、
第2中間かしめ部材112に形成した連通孔112と、
絞り調整部材116の内径部と円筒部110bの外周に
形成したテーパ状の三角溝110fとの間で画成される
空間とが絞りTとなる。According to the pulsating pressure absorbing hose having the above structure, the communication hole 110 g formed in the first intermediate caulking member 110 is
A communication hole 112 formed in the second intermediate caulking member 112;
The space defined between the inner diameter portion of the diaphragm adjusting member 116 and the tapered triangular groove 110f formed on the outer periphery of the cylindrical portion 110b is the diaphragm T.
【0071】そして、絞り調整部材116が拡径部11
0c側に移動すると(図17の矢印Y1 方向)、三角溝
110fの内部空間が狭くなるので絞り径が小さな絞り
Tとなり、絞り調整部材116が第2かしめ部材112
側に移動すると(図17の矢印Y2 方向)、三角溝11
0fの内部空間が広くなるので絞り径が大きな絞りTと
なる。The diaphragm adjusting member 116 is connected to the enlarged diameter portion 11.
Moving to 0c side (arrow Y 1 direction in FIG. 17), the internal space narrows The diaphragm diameter is maximum aperture T next to the triangular groove 110f, aperture adjustment member 116 and the second crimping member 112
Moving to the side (arrow Y 2 direction in FIG. 17), the triangular groove 11
Since the internal space of 0f becomes large, the aperture T becomes a large aperture.
【0072】この脈動圧吸収ホースの絞り調整を行う際
には、第1及び第2中間かしめ部材112、114間に
第3中間かしめ部材114を装着する前に、所定の絞り
径となるように、第3中間かしめ部材116内の絞り調
整部材116を軸方向に移動させておく。そして、絞り
調整部材116の位置調整が完了した後に、第1中間か
しめ部材112の円筒部110bに、絞り調整部材11
6及び第3中間かしめ部材114を装着し、次いで、円
筒部110bの雄ねじ部110gに雌ねじ孔112bを
螺合しながら第2中間かしめ部材112を装着し、最後
に、スパナ等の締め付け部材を使用して第1及び第2中
間かしめ部材112、114を互いに逆方向に回転する
ことにより、第3中間かしめ部材116を挟持する。When adjusting the throttle of the pulsating pressure absorbing hose, it is necessary to adjust the throttle diameter to a predetermined value before attaching the third intermediate caulking member 114 between the first and second intermediate caulking members 112 and 114. Then, the aperture adjusting member 116 in the third intermediate caulking member 116 is moved in the axial direction. After the position adjustment of the aperture adjustment member 116 is completed, the aperture adjustment member 11 is attached to the cylindrical portion 110b of the first intermediate caulking member 112.
6 and the third intermediate caulking member 114, and then the second intermediate caulking member 112 is mounted while screwing the female screw hole 112b into the male screw portion 110g of the cylindrical portion 110b. Finally, a tightening member such as a spanner is used. By rotating the first and second intermediate caulking members 112 and 114 in opposite directions, the third intermediate caulking member 116 is held.
【0073】したがって、本実施形態の脈動圧吸収ホー
スは、他の実施形態と同様の作用効果を得ることができ
るとともに、第3中間かしめ部材116内で係合してい
る絞り調整部材116を軸方向に移動するだけで絞りT
の絞り径を微調整することができるので、他の実施形態
と同様の作用効果を得ることができる。Therefore, the pulsating pressure absorbing hose of the present embodiment can obtain the same operation and effect as those of the other embodiments, and can use the throttle adjusting member 116 engaged in the third intermediate caulking member 116 as a shaft. Just move in the direction
Can be finely adjusted, so that the same operation and effect as those of the other embodiments can be obtained.
【図1】1本のホース本体内にフレキシブル管を挿入し
た第1実施形態の脈動圧吸収ホースを示す図である。FIG. 1 is a view showing a pulsating pressure absorbing hose of a first embodiment in which a flexible tube is inserted into one hose body.
【図2】図1のII−II線矢視図である。FIG. 2 is a view taken along line II-II of FIG.
【図3】図2のIII −III 線矢視図である。FIG. 3 is a view taken along line III-III in FIG. 2;
【図4】第1実施形態の脈動圧吸収ホースをモデル化し
た図である。FIG. 4 is a diagram modeling the pulsating pressure absorbing hose of the first embodiment.
【図5】本発明の第2実施形態の脈動圧吸収ホースの横
断面を示す図である。FIG. 5 is a diagram showing a cross section of a pulsating pressure absorbing hose according to a second embodiment of the present invention.
【図6】図5のVI−VI線矢視図である。FIG. 6 is a view taken along line VI-VI of FIG. 5;
【図7】本発明の第3実施形態の脈動圧吸収ホースの横
断面を示す図である。FIG. 7 is a view showing a cross section of a pulsating pressure absorbing hose according to a third embodiment of the present invention.
【図8】図7のVIII−VIII線矢視図である。FIG. 8 is a view taken along line VIII-VIII in FIG. 7;
【図9】本発明の第4実施形態の脈動圧吸収ホースの横
断面を示す図である。FIG. 9 is a view showing a cross section of a pulsating pressure absorbing hose according to a fourth embodiment of the present invention.
【図10】図9のX −X 線矢視図である。FIG. 10 is a view taken along line XX of FIG. 9;
【図11】本発明の第5実施形態の脈動圧吸収ホースの
横断面を示す図である。FIG. 11 is a view showing a cross section of a pulsating pressure absorbing hose according to a fifth embodiment of the present invention.
【図12】図10のXII −XII 線矢視図である。FIG. 12 is a view taken along line XII-XII in FIG. 10;
【図13】第5実施形態の変形例を示す図である。FIG. 13 is a view showing a modification of the fifth embodiment.
【図14】2本のホース本体を中間かしめ部材で連結し
てなる脈動圧吸収ホースを示す図である。FIG. 14 is a view showing a pulsating pressure absorbing hose formed by connecting two hose bodies with an intermediate caulking member.
【図15】第6実施形態の脈動圧吸収ホースの要部断面
図である。FIG. 15 is a sectional view of a main part of a pulsating pressure absorbing hose of a sixth embodiment.
【図16】第7実施形態の脈動圧吸収ホースの要部断面
図である。FIG. 16 is a sectional view of a main part of a pulsating pressure absorbing hose of a seventh embodiment.
【図17】第8実施形態の脈動圧吸収ホースの要部断面
図である。FIG. 17 is a sectional view of a main part of a pulsating pressure absorbing hose of an eighth embodiment.
【図18】第8実施形態の脈動圧吸収ホースを構成して
いる第1中間かしめ部材、第3中間かしめ部材及び絞り
調整部材を示す斜視図である。FIG. 18 is a perspective view showing a first intermediate caulking member, a third intermediate caulking member, and a throttle adjusting member that constitute the pulsating pressure absorbing hose of the eighth embodiment.
【図19】第8実施形態の脈動圧吸収ホースを構成して
いる第2中間かしめ部材を示す斜視図である。FIG. 19 is a perspective view showing a second intermediate caulking member constituting the pulsating pressure absorbing hose of the eighth embodiment.
2、72A、72B ホース本体 2a ホース内周面 12 フレキシブル管 16、30、40、50、116 絞り調整部材 20 油溜まり空間(アキュムレータ室) 32、52 嵌合孔 36、80、98 連通孔 46、56 連通溝 60、66 キャップ部材 76 中間かしめ部材 104 雄ねじプラグ 110 第1中間かしめ部材 110f 三角溝 112 第2中間かしめ部材 114 第3中間かしめ部材 2, 72A, 72B Hose main body 2a Hose inner peripheral surface 12 Flexible pipe 16, 30, 40, 50, 116 Throttle adjusting member 20 Oil reservoir space (accumulator chamber) 32, 52 Fitting holes 36, 80, 98 Communication holes 46, 56 Communication groove 60, 66 Cap member 76 Intermediate caulking member 104 Male screw plug 110 First intermediate caulking member 110f Triangular groove 112 Second intermediate caulking member 114 Third intermediate caulking member
Claims (8)
回路中に配設され、前記流体圧ポンプが発生する流体圧
の脈動を吸収する脈動圧吸収ホースであって、ホース本
体の一端から途中までフレキシブル管を挿入し、前記フ
レキシブル管の外周と前記ホース本体の内周面との間に
流体溜まり空間を設けるとともに、前記流体溜まり空間
に通じる流体通路に絞りを形成する絞り調整部材を、前
記フレキシブル管の先端部に装着したことを特徴とする
脈動圧吸収ホース。1. A pulsating pressure absorbing hose disposed in a fluid pressure circuit using a fluid pressure pump as a pressure generating source to absorb pulsation of fluid pressure generated by the fluid pressure pump, wherein the pulsating pressure absorbing hose is provided from one end of a hose body. Inserting the flexible tube halfway, providing a fluid reservoir space between the outer periphery of the flexible tube and the inner peripheral surface of the hose body, and a throttle adjusting member that forms a restrictor in a fluid passage communicating with the fluid reservoir space, A pulsating pressure absorbing hose, which is attached to a distal end of the flexible tube.
設定した弾性体からなる筒形状の絞り調整部材を前記フ
レキシブル管の先端に外嵌し、前記ホース本体の内周面
と前記絞り調整部材の外周面との間に所定の隙間を設け
たことを特徴とする請求項1記載の脈動圧吸収ホース。2. A tube-shaped throttle adjusting member made of an elastic body having an outer diameter smaller than the inner diameter of the hose body, is fitted over the distal end of the flexible pipe, and the inner peripheral surface of the hose body and the throttle adjusting member are fitted. The pulsating pressure absorbing hose according to claim 1, wherein a predetermined gap is provided between the hose and the outer peripheral surface of the hose.
径を有し、軸中央部に嵌入孔を形成した筒形状の絞り調
整部材を、前記嵌入孔に前記フレキシブル管の先端を嵌
入して装着するとともに、前記絞り調整部材の軸方向
に、前記流体溜まり空間に通じる細径孔を形成したこと
を特徴とする請求項1記載の脈動圧吸収ホース。3. A cylindrical aperture adjusting member having an outer diameter substantially the same as the inner diameter of the hose body and having a fitting hole formed in the center of the shaft, wherein the tip of the flexible pipe is fitted into the fitting hole. 2. The pulsating pressure absorbing hose according to claim 1, wherein a small diameter hole communicating with the fluid reservoir space is formed in an axial direction of the throttle adjusting member.
整部材の両端面間を連続する連通溝を形成し、前記フレ
キシブル管の先端に装着したときに、前記ホース本体の
内周面と前記連通溝とで囲んだ空間を、前記流体溜まり
空間に通じる細径孔として設けることを特徴とする請求
項3記載の脈動圧吸収ホース。4. A communication groove which is continuous between both end faces of the aperture adjusting member is formed on an outer periphery of the aperture adjusting member, and when the hose is attached to a distal end of the flexible pipe, an inner peripheral surface of the hose body and the inner peripheral surface of the hose main body are connected to each other. The pulsating pressure absorbing hose according to claim 3, wherein a space surrounded by the communication groove is provided as a small-diameter hole communicating with the fluid reservoir space.
絞り調整部材の両端面間を連続する連通溝を形成し、前
記フレキシブル管の先端に装着したときに、前記フレキ
シブル管の外周面と前記連通溝とで囲んだ空間を、前記
流体溜まり空間に通じる細径孔として設けることを特徴
とする請求項3記載の脈動圧吸収ホース。5. A communication groove which is continuous between both end surfaces of the aperture adjusting member is formed in a peripheral surface of a fitting hole of the aperture adjusting member, and when the flexible adjusting tube is mounted on a distal end of the flexible tube, an outer periphery of the flexible tube is provided. 4. The pulsating pressure absorbing hose according to claim 3, wherein a space surrounded by a surface and the communication groove is provided as a small-diameter hole communicating with the fluid reservoir space.
ブル管を形成する金属帯状体の螺旋巻き形状を保持する
キャップ部材を装着するとともに、当該キャップ部材の
外観形状を、曲率を有する外周面が前記ホース本体の内
周面に向かって膨出する拡径部を備えた円錐台形状、ブ
リスタ形状等に形成したことを特徴とする請求項1記載
の脈動圧吸収ホース。6. A cap member for holding a spirally wound shape of a metal band forming the flexible tube is attached to a distal end of the flexible tube, and the outer shape of the cap member is changed to an outer peripheral surface having a curvature. 2. The pulsating pressure absorbing hose according to claim 1, wherein the hose is formed in a truncated cone shape, a blister shape, or the like having an enlarged diameter portion bulging toward an inner peripheral surface of the main body.
回路中に配設され、前記流体圧ポンプが発生する流体圧
の脈動を吸収する脈動圧吸収ホースであって、2本のホ
ース本体を中間かしめ部材を介して互いに直列に連結
し、一方のホース本体にフレキシブル管を挿入して当該
フレキシブル管の外周と一方のホース本体の内周面との
間に流体溜まり空間を設け、前記中間かしめ部材により
前記フレキシブル管の先端を支持するとともに、前記中
間かしめ部材に、前記流体溜まり空間と他方のホース本
体内部との間を連通する細径孔を形成したことを特徴と
する脈動圧吸収ホース。7. A pulsating pressure absorbing hose disposed in a fluid pressure circuit using a fluid pressure pump as a pressure source and absorbing pulsation of fluid pressure generated by the fluid pressure pump, comprising two hose bodies. Are connected in series via an intermediate caulking member, and a flexible tube is inserted into one of the hose bodies to provide a fluid pool space between the outer periphery of the flexible tube and the inner peripheral surface of the one hose body. A pulsating pressure absorbing hose, wherein a tip of the flexible pipe is supported by a caulking member, and a small-diameter hole communicating between the fluid reservoir space and the inside of the other hose body is formed in the intermediate caulking member. .
を微調整することが可能な径調整部材を一体に設けたこ
とを特徴とする請求項7記載の脈動圧吸収ホース。8. The pulsating pressure absorbing hose according to claim 7, wherein a diameter adjusting member capable of finely adjusting the diameter of the small diameter hole is provided integrally with the intermediate caulking member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9233036A JPH1163362A (en) | 1997-08-28 | 1997-08-28 | Pulsation pressure absorbing hose |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9233036A JPH1163362A (en) | 1997-08-28 | 1997-08-28 | Pulsation pressure absorbing hose |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH1163362A true JPH1163362A (en) | 1999-03-05 |
Family
ID=16948809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9233036A Pending JPH1163362A (en) | 1997-08-28 | 1997-08-28 | Pulsation pressure absorbing hose |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH1163362A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003262295A (en) * | 2002-03-08 | 2003-09-19 | Denso Corp | Orifice forming member and manufacturing method therefor |
KR100423229B1 (en) * | 2001-02-08 | 2004-03-18 | 엘지전선 주식회사 | A Pulse Reduction Power Steering Device Using A Diverging Hose |
KR100571557B1 (en) * | 2002-08-26 | 2006-04-17 | 엘에스전선 주식회사 | Ring type spiral cap in high pressure hose for pulsation reduction |
-
1997
- 1997-08-28 JP JP9233036A patent/JPH1163362A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100423229B1 (en) * | 2001-02-08 | 2004-03-18 | 엘지전선 주식회사 | A Pulse Reduction Power Steering Device Using A Diverging Hose |
JP2003262295A (en) * | 2002-03-08 | 2003-09-19 | Denso Corp | Orifice forming member and manufacturing method therefor |
KR100571557B1 (en) * | 2002-08-26 | 2006-04-17 | 엘에스전선 주식회사 | Ring type spiral cap in high pressure hose for pulsation reduction |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR0180505B1 (en) | Extensible house for reducing pressure pulses | |
US20020085928A1 (en) | Diaphragm type fuel pump | |
JP7471489B2 (en) | Manufacturing method of check valve unit | |
JPH06300150A (en) | Pipe coupling with valve, check valve, and check valve structure | |
JPH1163362A (en) | Pulsation pressure absorbing hose | |
ITTO20000932A1 (en) | EXHAUST SILENCER, IN PARTICULAR FOR A COMPRESSOR GROUP. | |
JP5528838B2 (en) | Connector for fuel piping | |
JP4417602B2 (en) | Hydraulic accumulator, specially hydraulic damper | |
JP3947746B2 (en) | Fluid equipment having a pipe joint structure | |
JP3267077B2 (en) | Check valve | |
JPH084702A (en) | Liquid pressure surge absorbing device and manufacture thereof | |
JP2005076477A (en) | Delivery pipe | |
US7494328B2 (en) | NVH and gas pulsation reduction in AC compressor | |
EP0846909B1 (en) | Damping eccentric element for hydraulic systems | |
JP2005076478A (en) | Delivery pipe | |
JPH10227269A (en) | Fuel pressure fluctuation reduction device | |
JPH0641799B2 (en) | Water hammer prevention device | |
JP2000203405A (en) | Abs actuator | |
CN219368061U (en) | Liquid storage device | |
JPH1130351A (en) | Hydraulic relief valve | |
KR200354536Y1 (en) | flow control valve | |
JPH08261096A (en) | Hydraulic surge absorbing device and its bellows assembly | |
EP1503132B1 (en) | Damping device for hydraulic circuits | |
JP2005069057A (en) | Delivery pipe | |
JPH0655947U (en) | Rubber hose for pulsation absorption of pressure fluid |