CN105090318B - 液压减震器 - Google Patents

液压减震器 Download PDF

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CN105090318B
CN105090318B CN201510266377.6A CN201510266377A CN105090318B CN 105090318 B CN105090318 B CN 105090318B CN 201510266377 A CN201510266377 A CN 201510266377A CN 105090318 B CN105090318 B CN 105090318B
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桥田浩一
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/021Installations or systems with accumulators used for damping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/0418Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall having a particular shape, e.g. annular, spherical, tube-like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • F15B1/08Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/3207Constructional features
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04Devices damping pulsations or vibrations in fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008Reduction of noise or vibration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00Accumulators
    • F15B2201/20Accumulator cushioning means
    • F15B2201/22Accumulator cushioning means using elastic housings

Abstract

本发明提供一种液压减震器,其能够以较小的体积得到较大的液压变动吸收效果。液压减震器具备橡胶等弹性材料制的气囊、金属等硬质材料制的芯以及金属等硬质材料制的插栓,并配设于液压泵的排出侧通路。气囊的一端封闭另一端开口,除了球面状的封闭端部外形成为圆筒状,并在开口端部一体地具有环状的外向凸缘部。芯具有插入于气囊内的插入部、以及与气囊的开口端面抵接的环状的外向凸缘部,插入部具备嵌合于气囊的开口端部内而将该开口端部液封的大径部、在气囊内从大径部朝向气囊的封闭端部延伸突出从而在气囊内形成空气室的渐变径部以及小径部。插栓收容外向凸缘部,并相对于芯束缚气囊。

Description

液压减震器
技术领域
本发明涉及液压减震器,特别是涉及配设于液压泵的排出侧通路并吸收液压泵的排出脉动(高压侧的液压变动)的液压减震器。
背景技术
这种液压减震器例如记载于下述专利文献1,在该专利文献1所记载的液压减震器中,与液压泵的排出脉动(高压侧的液压变动)对应地弹性变形的弹性壁部件由弹簧钢所构成的板状的板(膜片)与支承该膜片的橡胶制的主体这两个部件构成。
专利文献1:日本特表2004-532957号公报
然而,在上述专利文献1所记载的液压减震器中,膜片的外周被主体支承,从而在膜片与液压泵的排出脉动(高压侧的液压变动)对应地弹性变形时,伴随着膜片的弹性变形,膜片的外周与主体产生摩擦。因此,摩擦所引起的滞后损失变大,难以以较小的体积得到较大的液压变动吸收效果(减震效果)。
发明内容
本发明是为了解决上述课题而提出的(以较小的体积得到较大的液压变动吸收效果(减震效果)),本发明所涉及的液压减震器的特征在于,具备:橡胶等弹性材料制的气囊(弹性壁部件),该气囊的一端封闭,另一端开口,除了球面状的封闭端部外形成为圆筒状,并且在开口端部一体地具有环状的外向凸缘部;硬质材料制的芯(芯部件),该芯具有插入于上述气囊内的插入部以及与上述气囊的开口端面抵接的环状的外向凸缘部,上述插入部具备嵌合于上述气囊的上述开口端部内并将该开口端部液封的大径部、在上述气囊内从上述大径部朝向上述气囊的上述封闭端部延伸突出从而在上述气囊内形成空气室的渐变径部以及小径部;以及硬质材料制的插栓(栓部件),该插栓收容上述气囊的上述外向凸缘部与上述芯的上述外向凸缘部,并通过上述外向凸缘部而相对于上述芯束缚上述气囊,该液压减震器配设于液压泵的排出侧通路。
在实施上述本发明之际,也能够将上述气囊的圆筒状部的内径设定为外径的1/2以下,或者基于上述气囊的圆筒状部的外压下的压曲载荷来设定上述芯的小径部,并通过使上述气囊的圆筒状部的内径与上述芯的小径部抵接,从而限制上述气囊的圆筒状部的压曲变形。
在上述本发明所涉及的液压减震器中,在其使用时,若向气囊的外侧施加液压泵的排出脉动(高压侧的液压变动),则气囊与排出脉动(高压侧的液压变动)对应地朝向空气室弹性地压缩变形。此时,气囊除了开口部附近外,不与芯摩擦卡合,因此能够在使摩擦所引起的滞后损失为最小限度的状态下吸收高压侧的液压变动。因此,能够以较小的体积得到较大的液压变动吸收效果(减震效果)。另外,在本发明所涉及的液压减震器中,使空气室为液封(密封)状态。因此,在气囊朝向空气室弹性地压缩变形时,空气室作为空气弹簧而发挥功能,从而有助于气囊的耐压提高。
在实施上述本发明之际,在将上述气囊的圆筒状部的内径设定为外径的1/2以下的情况下,能够提高气囊的外压下的压曲载荷,从而能够提高该液压减震器的耐压性能。
另外,在实施上述本发明之际,基于上述气囊的圆筒状部的压曲载荷来设定上述芯的小径部,并通过使上述气囊的圆筒状部的内径与上述芯的小径部抵接,从而限制上述气囊的圆筒状部的压曲变形,在该情况下,利用芯的小径部来限制气囊的圆筒状部的压曲变形,从而能够防止气囊的局部的过大变形,因此能够提高该液压减震器的耐久性。
附图说明
图1是示意地表示本发明所涉及的液压减震器的一实施方式的整体构成图。
图2是图1所示的液压减震器的主要构成部件的放大剖视图。
图3是表示本发明所涉及的液压减震器的插栓的其他实施方式的与图2相当的剖视图。
附图标记的说明
100…液压减震器;10…气囊;11…封闭端部;12…开口端部;13…外向凸缘部;14…圆筒状部;20…芯;21…插入部;21a…大径部;21b…渐变径部;21c…小径部;22…外向凸缘部;30…插栓;31…主体部;32…束缚部;34…束缚环;40…壳体;50…液压泵;60…节流阀;Po…排出侧通路;Ra…空气室。
具体实施方式
以下,基于附图对本发明的实施方式进行说明。图1以及图2表示本发明所涉及的液压减震器的一实施方式,本实施方式的液压减震器100具备橡胶(例如,乙烯·丙烯橡胶)等弹性材料制的气囊10、金属(例如,不锈钢)等硬质材料制的芯20、以及金属(例如,不锈钢)等硬质材料制的插栓30,该液压减震器100通过插栓30而组装于壳体(致动器的主体)40,从而配设于液压泵50的排出侧通路Po。此外,在液压减震器100的出口侧设置有节流阀60,从而将与液压泵50的旋转同步的流量变动转换为高压的液压变动。
如图2所示,对于气囊10而言,其一端(图2下方的前端)封闭另一端(图2上方的基端)开口,除了球面状的封闭端部11外形成为圆筒状,并且在开口端部12一体地具有环状的外向凸缘部13。对于气囊10的圆筒状部14而言,其内径设定为外径的1/2,并形成为厚壁。此外,圆筒状部14的内径也能够设定为外径的1/2以下来实施。
芯20具有插入于气囊10内的插入部21、以及与气囊10的开口端面抵接的环状的外向凸缘部22。插入部21具备嵌合于气囊10的开口端部12内并将该开口端部12液封的大径部21a、在气囊10内从大径部21a朝向气囊10的封闭端部11延伸突出从而在气囊10内形成空气室Ra的渐变径部21b以及小径部21c。此外,小径部21c的前端形成为球面状。
基于气囊10的圆筒状部14的外压下的压曲载荷(能够预先通过解析开求出)来设定芯20的小径部21c的粗细(外径)。因此,通过使气囊10的圆筒状部14的内径与芯20的小径部21c外周抵接,从而限制气囊10的圆筒状部14的压曲变形。对于渐变径部21b而言,其整体的剖面形状形成为曲线状,但也能够将中间部分的剖面形状形成为直线状(将中间部分形成为圆锥台形状)来实施。
插栓30具备收容气囊10的外向凸缘部13与芯20的外向凸缘部22的主体部31、以及通过外向凸缘部13、22而相对于芯20束缚气囊10的环状的束缚部32,并且具备用于固定于壳体40的环状阶梯部33。此外,在束缚部32中,通过凿紧其一部分,从而相对于芯20束缚气囊10,由此使气囊10、芯20、以及插栓30形成为一体。另外,在环状阶梯部33中,如图1所示,通过凿紧壳体40的一部分,从而使插栓30相对于壳体40液密地固定。
在如上述那样构成的本实施方式的液压减震器100中,在其使用时,若对气囊10的外侧施加液压泵50的排出脉动(高压的液压变动),则气囊10与高压的液压变动对应地朝向空气室Ra弹性地压缩变形。此时,气囊10除了开口部附近外,不与芯20摩擦卡合,因此,能够在使摩擦所引起的滞后损失为最小限度的状态下吸收高压的液压变动。因此,能够以较小的体积得到较大的液压变动吸收效果(减震效果)。另外,在本实施方式的液压减震器100中,使空气室Ra为液封(密封)状态。
因此,在气囊10朝向空气室Ra弹性地压缩变形时,空气室Ra作为空气弹簧来发挥功能,从而有助于气囊10的耐压提高。
另外,在本实施方式的液压减震器100中,对于气囊10的圆筒状部14而言,由于其内径设定为外径的1/2从而形成为厚壁,所以能够提高气囊10的外压下的压曲载荷,由此能够充分提高该液压减震器100的耐压性能。
另外,在本实施方式的液压减震器100中,基于气囊10的圆筒状部14的外压下的压曲载荷来设定芯20的小径部21c,并通过使气囊10的圆筒状部14的内径与芯20的小径部21c抵接,从而限制气囊10的圆筒状部14的压曲变形。因此,利用芯20的小径部21c来限制气囊10的圆筒状部14的压曲变形,能够防止气囊10的局部的过大变形。因此,能够提高该液压减震器100的耐久性。
在上述实施方式中,如图2所示,在插栓30中凿紧束缚部32的一部分,从而相对于芯20束缚气囊10来实施,但是也能够如图3所示的实施方式那样构成来实施。在图3所示的实施方式中,在插栓30中压入束缚环34而将其嵌合固定于束缚部(圆筒部)32,从而防止气囊10相对于芯20脱落。

Claims (3)

1.一种液压减震器,其特征在于,具备:
橡胶制的气囊,该气囊的一端封闭另一端开口,除了球面状的封闭端部外形成为圆筒状,并且在开口端部一体地具有环状的外向凸缘部;
硬质材料制的芯,该芯具有插入于所述气囊内的插入部以及与所述气囊的开口端面抵接的环状的外向凸缘部,所述插入部具备嵌合于所述气囊的所述开口端部内而将该开口端部液封的大径部、在所述气囊内从所述大径部朝向所述气囊的所述封闭端部延伸突出并且在所述气囊内形成空气室的渐变径部以及小径部;以及
硬质材料制的插栓,该插栓收容所述气囊的所述外向凸缘部与所述芯的所述外向凸缘部,并通过所述外向凸缘部而相对于所述芯束缚所述气囊,
该液压减震器配设于液压泵的排出侧通路,
所述芯的所述小径部的前端形成为球面状,
在未对所述气囊的外侧施加所述液压泵的排出脉动的状态下,所述小径部的前端远离所述气囊中的所述封闭端部的内壁而形成为非接触、并且所述小径部的外周远离所述气囊中的所述圆筒状部的内壁而形成为非接触。
2.根据权利要求1所述的液压减震器,其特征在于,
所述气囊的圆筒状部被设定为内径为外径的1/2以下。
3.根据权利要求1或2所述的液压减震器,其特征在于,
基于所述气囊的圆筒状部的外压下的压曲载荷来设定所述芯的小径部,通过使所述气囊的圆筒状部的内径与所述芯的小径部抵接,从而限制所述气囊的圆筒状部的压曲变形。
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