WO2019000646A1 - Valve assembly, piston unit and oil damper - Google Patents

Valve assembly, piston unit and oil damper Download PDF

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Publication number
WO2019000646A1
WO2019000646A1 PCT/CN2017/101224 CN2017101224W WO2019000646A1 WO 2019000646 A1 WO2019000646 A1 WO 2019000646A1 CN 2017101224 W CN2017101224 W CN 2017101224W WO 2019000646 A1 WO2019000646 A1 WO 2019000646A1
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WIPO (PCT)
Prior art keywords
valve
body
piston
provided
assembly
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PCT/CN2017/101224
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French (fr)
Chinese (zh)
Inventor
孟范鹏
王明海
张兴田
孙法明
丁辉
邵立鹏
李世双
王勇
马飞
Original Assignee
中车青岛四方车辆研究所有限公司
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Priority to CN201710512103.XA priority Critical patent/CN107143603B/en
Priority to CN201710512103.X priority
Application filed by 中车青岛四方车辆研究所有限公司 filed Critical 中车青岛四方车辆研究所有限公司
Publication of WO2019000646A1 publication Critical patent/WO2019000646A1/en

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    • 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
    • F16F9/3214Constructional features of pistons
    • 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
    • F16F9/34Special valve constructions; Shape or construction of throttling passages
    • F16F9/3405Throttling passages in or on piston body, e.g. slots

Abstract

Disclosed is a valve assembly (22) arranged on a piston body (21) of an oil damper (3), wherein a valve cover (221) is provided with a fluid hole (2213). Oil above the piston body (21) successively passes through the fluid hole (2213) and a discharge hole (211) so as to realize unloading and vibration-damping functions, thus avoiding the geometrical tolerance between a valve cover (121) and a valve core (122) being influenced when an unloading opening (1222) is machined in a side wall of a blind hole (1221) of the valve core (122) in the prior art, thereby ensuring that the valve cover (221) and a valve core (222) fit precisely and further making the valve assembly (22) have a stable quality and a stable precision performance. Further disclosed is a piston unit (2) applied to the oil damper (3) and provided with the valve assembly (22) mentioned above, wherein same has a stable quality and stable precision performance. Further disclosed is an oil damper (3) provided with the piston unit (2) mentioned above, wherein same has a stable quality and stable precision performance.

Description

阀体组件、活塞单元及油压减振器 The valve assembly, the piston unit and a hydraulic damper 技术领域 FIELD

本申请属于轨道机车车辆用油压减振器技术领域,尤其涉及一种阀体组件、活塞单元及油压减振器。 The present application belongs to a railway vehicle has a hydraulic shock absorber technologies, and particularly to a valve assembly, the piston unit and a hydraulic damper.

背景技术 Background technique

轨道机车车辆用油压减振器包括工作缸以及置于工作缸中的活塞单元,所述工作缸中充注有油液,即所述活塞单元上方和下方都充注有油液。 Rail rolling stock oil damper comprises a cylinder and a piston disposed in the cylinder unit, the working cylinder filled with oil, i.e., above and below the piston unit are filled with oil. 参见图1和图2,所述活塞单元1包括活塞本体11,所述活塞本体11的顶部设置有一个或者多个阀体组件12,所述每个阀体组件12均包括阀罩121、阀芯122和弹簧123。 Referring to FIGS. 1 and 2, the piston unit comprises a piston body 11, the top of the piston body 11 is provided with one or more valve assemblies 12, 12 of each valve assembly includes a valve housing 121, valve core 122 and a spring 123. 所述阀罩121和阀芯122均为圆柱状结构,所述阀罩121的外表面与所述活塞本体11螺纹连接,所述阀罩121轴向设置有通孔1211,所述阀芯122套设于所述通孔1211中,所述通孔1211对所述阀芯122的运动起导向作用,且所述阀芯122外表面与所述通孔1211内表面间隙配合,从而封闭油路;所述阀芯122轴向设置有盲孔1221,所述盲孔1221的底部侧壁上设置有方形的卸荷口1222,所述阀芯122一端通过弹簧123与所述活塞本体11连接以使所述阀芯122能够上下移动,所述阀芯122上设置有封油部1223,所述弹簧123可压迫所述封油部1223上表面,使其与所述阀罩121下表面相贴合以封闭油路,所述活塞本体11的底面上与所述阀芯122相对应的位置处设置有排出口111;当所述活塞本体11向上运动时,所述油液的流动方向如图2中虚线所示,所述活塞本体11向上运动使得活塞本体11上方的油液压力增加 The valve cover 121 and valve body 122 are cylindrical structures, the valve cover 11 and the outer surface 121 of the threaded connection of the piston body, the valve cover 121 is provided with an axial through hole 1211, the valve spool 122 through holes provided in the sleeve 1211, the through hole 1211 serves as a guide for movement of the valve body 122 and the outer surface of the valve body 122 and the inner surface of the gap with the through hole 1211, thereby closing the passage ; the valve body 122 is provided with a blind axial hole 1221, the blind is provided with a square opening 1222 of the bottom unloading sidewall of the hole 1221, the valve body 122 by a spring 123 with one end of the piston body 11 is connected so that the valve body 122 can move up and down, the oil on the spool 122 has a seal portion 1223 is provided, the spring 123 can urge said seal surface 1223 on the oil, so that the bonding surface of the valve housing 121 and to close the passage, at a position of the bottom surface of the piston body and the valve body 12 211 is provided with a corresponding discharge port 111; when the upward movement of the piston body 11, the oil flow direction in FIG. 2 in dashed lines, an upward movement of the piston body 11 so that fluid pressure above the piston body 11 is increased 所述阀芯122在油液的压力下向下移动,所述卸荷口1222与所述阀罩121的通孔1211内表面分离,所述活塞本体11上方油液依次通过所述阀芯122的盲孔1221、卸荷口1222及活塞本体11的排出口111,从活塞本体11上方流入活塞本体11下方,从而完成卸荷过程,达到减振效果。 The valve element 122 moves downwardly at a pressure of fluid, said unloading port surface 1222 separated from the through hole 1211121 with the valve housing, the piston body 11 above the oil passes through the valve body 122 blind holes 1221, 1222 and the unloading port of the piston body 11 of the discharge port 111, flows downward from above the piston body 11 of the piston body 11, thereby completing the unloading process, to achieve a damping effect. 为了使油压减振器具有双向的卸荷和减振效果,所述活塞本体11的底部进一步设置有所述阀体组件12,所述活塞本体11底部的阀体组件12与活塞本体11顶部的阀体组件12相互背离且交错设置。 In order to make the hydraulic shock absorber with bidirectional damping effect and unloading, the bottom of the piston body 11 is further provided with a top 12 of the valve assembly, the valve assembly 11 of the bottom 12 of the piston body 11 and the piston body the valve assembly 12 away from each other and staggered.

由上述可知,所述阀罩121内表面与所述阀芯122外表面之间的间隙配合,要保证稳定流畅地导向所述阀芯122的上下运动,因此,所述阀罩121内表面与所述阀芯122外表面之间的配合形位公差对阀体组件12和活塞单元1,以及对整个油压减振器的质量稳定性具有非常重要的影响。 From the foregoing, the valve cover 121 gap between the inner surface and outer surface of the spool 122 cooperate to ensure stable and smooth manner guided vertical movement of the valve body 122, therefore, the valve cover and the inner surface 121 geometric tolerance fit between the outer surface 122 of the valve body 1, and the stability has a very important influence on the quality of the oil damper 12 of the valve body assembly and piston unit. 但是,在加工卸荷口1222的过程中,不可避免地要夹持住所述阀芯122外表面,同时阀芯122外表面也受到来自加工刀具的突变力量冲击,进而影响所述阀芯122外表面的圆柱度和垂直度,影响所述阀罩121内表面与所述阀芯122外表面之间的间隙配合公差,进而影响所述油压减振器质量和精度的稳定性。 However, during the processing of unloading port 1222, inevitably stay clamping surface 122 of the outer valve element, while the outer surface of the valve body 122 has also been mutated from an impact force of the machining tool, thereby affecting the valve body 122 outer surface cylindrical and verticality, 121 affect the gap between the inner surface and outer surface of the valve body 122 of the valve housing tolerances, thereby affecting the stability of the quality and accuracy of the hydraulic damper.

发明内容 SUMMARY

本申请针对现有的油压减振器质量和精度不稳定的技术问题,提出一种阀体组件、应用该阀体组件的活塞单元以及应用该活塞单元的油压减振器。 The present application is directed to problems of the prior art hydraulic damper unstable quality and precision, to provide a valve assembly, the valve assembly of the piston unit of the application and the application of the oil damper piston unit.

为了达到上述目的,本申请采用的技术方案为: To achieve the above object, the technical solution adopted for the present application:

一种阀体组件,设置于油压减振器的活塞本体上,包括阀罩,以及可活动地套设于所述阀罩内部的阀芯,所述阀罩的外表面与所述活塞本体连接,所述阀罩设置有导向孔,所述阀芯套设于所述导向孔中,所述阀芯与所述导向孔间隙配合以封闭油路;所述阀芯与所述活塞本体弹性连接,所述阀罩背离所述导向孔的一端设置有卸荷孔,所述阀罩上设置所述导向孔的一端进一步设置有流体孔,所述流体孔与所述卸荷孔相连通;所述阀芯进一步套设于所述卸荷孔中,所述阀芯的外表面与所述卸荷孔的内表面间隙配合以流通油液。 One kind of valve assembly, the piston body is provided in a hydraulic shock absorber, comprising a valve housing and a movable sleeves on the outer surface of the valve body inside the valve housing, said valve housing and said piston body connecting the valve housing is provided with a guide hole, the valve body guide hole provided in the sleeve, the valve body guide hole with a clearance fit to said closed passage; said elastic valve body and the piston body connecting the valve housing facing away from the end of the guide hole is provided with a relief hole, the valve cover is provided at one end of the guide hole is further provided with a fluid hole, said fluid hole and the relief hole communicating; the sleeve is further provided in the valve body relief hole, the outer surface of the valve body and the inner surface of the gap of the relief holes to fit the flow of oil.

作为优选,所述阀芯进一步设置有可与所述阀罩相配合以封闭油路的封油部,所述封油部设置于所述阀罩下方,所述封油部的顶面与所述阀罩的底面贴合。 Advantageously, the valve body is further provided with a valve housing cooperating with said closure to close the oil passage, the oil seal portion provided within the valve housing below the top surface of the oil seal portion said valve housing bottom surface bonded.

作为优选,所述阀芯进一步设置有锥形部,所述锥形部套设于所述卸荷孔中,所述锥形部与所述卸荷孔间隙配合以流通油液。 Advantageously, the valve body is further provided with a tapered portion, the tapered portion sleeved on the relief hole, the tapered portion and the clearance fit hole to unload oil circulation.

作为优选,所述阀罩进一步设置有储油腔,所述储油腔的顶端分别与所述导向孔和流体孔相连通,所述储油腔的底端与所述卸荷孔相连通。 Advantageously, the valve housing is further provided with an oil chamber, respectively, to the top of the reservoir chamber and the fluid guide hole communicating hole, the bottom end of the reservoir chamber and the relief holes communicating.

作为优选,所述阀芯背离所述活塞本体的一端轴向设置有节流孔,所述阀芯的相对另一端轴向设置有盲孔,所述节流孔与所述盲孔相连通。 Advantageously, said one end of the valve body facing away from the piston body is provided with an axial orifice, the opposite end of the spool is provided with a blind axial hole, said orifice communicating with said blind bore.

本申请进一步提供一种活塞单元,设置于油压减振器中,包括活塞本体,所述活塞本体上设置有前述的阀体组件。 The present application further provides a piston unit, provided to the hydraulic shock absorber, comprising a piston body, the valve body assembly is provided on the piston body.

作为优选,所述阀体组件轴向设置于所述活塞本体的顶部和底部。 Advantageously, the valve assembly axially disposed in the top and bottom of the piston body.

作为优选,所述活塞本体顶部的阀体组件与所述活塞本体底部的阀体组件在轴向上相互交错设置。 Advantageously, the top of the piston assembly of the valve body and the valve body assembly at the bottom of the piston body disposed staggered in the axial direction.

作为优选,所述活塞本体顶部的阀体组件沿周向分布于所述活塞本体的顶部;所述活塞本体底部的阀体组件沿周向分布于所述活塞本体的底部。 Advantageously, the top of the piston assembly of the valve body circumferentially distributed on the top of the piston body; a piston valve assembly of the base body circumferentially distributed at the bottom of the piston body.

本申请进一步提供一种油压减振器,包括工作缸,所述工作缸中设置有活塞单元,所述活塞单元上设置有如前述的阀体组件。 The present application further provides a hydraulic shock absorber comprising a working cylinder, the working cylinder provided with a piston unit, like the valve body assembly is provided on the piston unit.

与现有技术相比,本申请的优点和积极效果在于: Compared with the prior art, the advantages and positive effects of the present application comprising:

1、本申请的阀体组件在所述阀罩上设置流体孔,所述活塞本体上方的油液依次通过所述流体孔和排出口来实现卸荷和减振功能,避免了现有技术中在所述阀芯盲孔侧壁上加工卸荷口时对所述阀罩和阀芯之间的形位公差的影响,保证了所述阀罩与阀芯之间的配合精度,进而使本申请阀体组件具有稳定的质量和精度。 1, the valve assembly of the present disclosure is provided in the valve cover bore fluid, oil above the piston body sequentially to achieve a vibration reduction function and unloading through the fluid and an outlet orifice, to avoid the prior art Effects of processing geometric tolerances between the valve body and the valve housing when the unloading port in the valve body blind hole on the side walls, to ensure the accuracy of fit between the valve cover and valve body, thereby enabling the application of the present the valve body assembly having a stable quality and precision.

2、本申请的阀体组件,所述活塞本体上方的油液分别流过所述卸荷孔与所述阀芯之间的通路、所述封油部的顶面与所述阀罩底面之间的通路时,均是在圆周方向上均匀流过,所述油液对所述阀芯产生的径向力相互抵消,避免了所述阀芯的局部应力疲劳,进一步地提高了本申请阀体组件的质量和使用寿命。 2, the valve assembly of the present disclosure, the piston body above the oil flowing through the discharge passage between the bearing hole and the valve body, a top surface of the oil seal portion of the bottom surface of the valve housing when the path between, are uniform in the circumferential direction of the flow through the radial force generating valve body of the oil to cancel each other, to avoid local stress fatigue of the valve body, and further improve the application of the present valve quality of life and body components.

3、本申请的阀体组件,所述阀芯上设置锥形部,所述锥形部外表面与所述卸荷孔内表面之间形成变截面油液通路,避免了因所述阀芯刚向下运动时即使该处流通较多的油液量而造成瞬间卸荷的情况,使本申请的阀体组件平缓卸荷,进一步提高了质量稳定性,并使本申请的阀体 组件满足阻尼力与卸荷速度呈线性或类线性的要求。 3, the valve assembly of the present application, the tapered portion is provided on the valve body, the fluid passage is formed between a variable cross-section the tapered outer surface portion of the relief bore surface, the valve body is avoided due to just downward movement even more where the amount of fluid flow caused by the unloading instant case, the valve body assembly gentle unloading of the present disclosure, to further improve the stability of quality, and the valve assembly of the present disclosure meet unloading speed and damping force linearly or almost linearly requirements.

4、本申请的阀体组件,所述阀罩进一步设置有储油腔,所述储油腔可缓冲所述阀芯向下运动瞬间所述油液对所述锥形部外表面的冲击,进一步提高本申请阀体组件的质量稳定性。 4, the valve assembly of the present disclosure, the valve housing is further provided with a reservoir chamber, the reservoir chamber may buffer the instant the valve element moves downward impact on the oil portion of the tapered outer surface, the present application further improve the quality stability of the valve body assembly.

5、本申请的阀体组件,所述节流孔设置于所述阀芯的顶端,与现有技术中的节流孔相比,不仅加工方便,而且加工时不会影响所述阀芯外表面与所述通孔内表面的配合精度。 5, the valve assembly of the present disclosure, the orifice is provided at the top of the valve body, as compared with the prior art the orifice, not only easy to process, and will not affect the processing of the outer valve element the surface accuracy of the mating surface of the through hole.

附图说明 BRIEF DESCRIPTION

图1为现有技术活塞单元的俯视图; FIG. 1 is a top plan view of a prior art piston unit;

图2为图1中AA方向剖视图; FIG 2 is a cross-sectional view in the direction AA in Figure 1;

图3为本申请实施方式所述的活塞单元的结构示意图; FIG 3 embodiments of the present application embodiment a schematic view of a configuration of the piston unit;

图4为图3的俯视图; 4 is a plan view of FIG. 3;

图5为本申请一种实施方式中图4 AA方向的剖面图; 5 a sectional view of one kind of the embodiment of FIG. 4 AA direction of application of the present embodiment;

图6为图5中的活塞单元的油液流通状态图; FIG 6 is a piston fluid flow state diagram of FIG. 5 unit;

图7为本申请实施方式所述的阀芯的结构示意图; Figure 7 is a schematic structural embodiment of the application of the embodiment of the valve body;

图8为本申请另一种实施方式中图4 AA方向的剖面图; 8 a sectional view of another embodiment in FIG. 4 AA direction of application of the present embodiment;

图9为图8中阀罩和阀芯的油液流通状态图; 9 is a state diagram of FIG fluid flow 8 and the valve body of the valve housing;

图10为本申请实施方式所述的阀罩的结构示意图; FIG 10 a schematic view of the application of the present embodiment of the structure of the valve cover embodiment;

图11为本申请一种实施方式所述的活塞单元的剖面图一; FIG 11 an embodiment of the present application embodiment a cross-sectional view of the piston unit;

图12为本申请一种实施方式所述的活塞单元的剖面图二。 FIG 12 an embodiment of the present application embodiment a piston cross-sectional view of the unit II.

图13为本申请实施方式所述的油压减振器的结构示意图。 FIG 13 is a schematic structural diagram of the embodiment of the hydraulic damper embodiment of the present application.

图中:1、活塞单元;11、活塞本体;111、排出口;12、阀体组件;121、阀罩;1211、通孔;122、阀芯;1221、盲孔;1222、卸荷口;1223、封油部;1224、节流孔;123、弹簧; In FIG: 1, piston unit; 11, piston body; 111, a discharge port; 12, valve assembly; 121, valve cover; 1211, through hole; 122, valve body; 1221, blind hole; 1222, unloading port; 1223 , the oil seal; 1224, orifice; 123, spring;

2、活塞单元;21、活塞本体;211、排出口;22、阀体组件;221、阀罩;2211、导向孔;2212、卸荷孔;2213、流体孔;2214、储油腔;222、阀芯;2221、 封油部;2222、锥形部;2223、节流孔;2224、盲孔;223、弹簧;3、油压减振器;31、工作缸。 2, piston unit; 21, piston body; 211, a discharge port; 22, valve assembly; 221, valve cover; 2211, guide holes; 2212, unloading aperture; 2213, the fluid aperture; 2214, accumulator chamber; 222, the valve body; 2221, the oil seal; 2222, tapered portion; 2223, orifice; 2224, blind hole; 223, spring; 3, the hydraulic shock absorber; 31, the cylinder.

具体实施方式 Detailed ways

下面,通过示例性的实施方式对本申请进行具体描述。 Hereinafter, specific description of the present application by way of an exemplary embodiment. 然而应当理解,在没有进一步叙述的情况下,一个实施方式中的元件、结构和特征也可以有益地结合到其他实施方式中。 However, it should be understood that, without further description, elements, and structural features of one embodiment may be beneficially incorporated in other embodiments.

在本申请的描述中,需要说明的是,轴向是指工作缸和活塞本体的轴向,也是活塞本体运动的方向;周向是指工作缸和活塞本体的圆周方向;径向是指工作缸和活塞本体的半径方向;术语“顶”、“底”“内”、“外”、“上”、“下”、“前”、“后”等指示的方位或位置关系为基于附图2和附图3所示的位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。 In the description of the present application, it is noted that the axial direction means an axial cylinder and the piston body, but also the direction of movement of the piston body; refers to the circumferential direction of the circumferential direction of the cylinder and the piston body; refers to a radial working the radial direction of the cylinder and piston body; position or location relative terms "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear" and the like based on the drawings as indicated positional relationship shown in figures 2 and 3, merely for convenience of description of the present application and to simplify the description, but not indicate or imply that the device or element referred to must have a particular orientation, the orientation of a particular configuration and operation, and therefore can not understand as limiting the present application. 此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性。 In addition, the terms "first", "second" are for illustrative purposes only, and not intended to indicate or imply relative importance.

图3为本申请阀体组件22及其上活塞单元2的结构示意图,图4为图3的俯视图,图5为图3中AA方向的剖面图。 Figure 3 is a schematic structural diagram of the application of the valve body assembly 22 and the piston unit 2 is on, FIG 4 is a top plan view of FIG. 3, FIG. 5 is a sectional view in the direction AA in Fig. 如图3所示,一种阀体组件22,设置于油压减振器的活塞本体21上,用于封闭或开启油路以实现减震效果,所述油压减振器内充注有油液。 As shown a valve assembly 22, 21, for opening or closing the oil path to achieve the damping effect, the charging of the hydraulic damper 3 is provided in the hydraulic damper has a piston body injection oil. 图5所示,本申请的阀体组件22包括阀罩221、阀芯222和弹簧223,所述阀罩221的外表面与所述活塞本体21螺纹连接,其中,所述外表面是指的圆柱状阀罩221的侧面;所述阀罩221轴向设置有导向孔2211和卸荷孔2212,所述阀芯222由上至下依次套设于所述导向孔2211和卸荷孔2212中,所述阀芯222上部的外表面与所述导向孔2211的内表面精密间隙配合,该间隙配合的精度满足精确导向功能并且能够封闭油路,所述阀芯222下部的外表面与所述卸荷孔2212的内表面间隙配合以形成可使油液通过的通路;所述阀罩221进一步轴向设置有流体孔2213,所述卸荷孔2212的顶部分别与所述导向孔2211和流体孔2213相连通,所述活塞本体21上方的油液可通过所述流体 孔2213流入所述卸荷孔2212与所述阀芯222之间通路中;所述阀芯222底面与所述活塞本体21的底面弹性连接,即所述阀芯222底面通过弹 5, the valve assembly 22 of the present disclosure includes a valve housing 221, valve body 222 and a spring 223, the valve 221 is connected to the outer surface of the cover 21 with the thread of the piston body, wherein the outer surface refers to a cylindrical side surface 221 of the valve housing; the valve cover 221 is provided with an axial guide hole 2211 and hole 2212 unloading, from top to bottom of the valve body 222 sleeved on said unloading guide hole 2211 and hole 2212 the valve body 222 of the upper portion of the outer surface of guide hole 2211 of the inner surface of the precision clearance fit, the clearance fit to meet the precision and accuracy guide function capable of closing the oil passage, said valve body outer surface 222 of the lower portion the inner surface of the clearance of relief holes 2212 can cooperate to form a fluid passageway therethrough; said valve housing 221 is further provided axially with a fluid bore 2213, a detachable top bearing holes 2212 are the guide holes 2211 and the fluid communicating hole 2213, the oil above the piston body 21 may flow path between the bearing hole 222 of the valve body 2212 with the discharged fluid through the orifice 2213; bottom surface 222 of the valve body and the piston body the bottom surface of the elastic connector 21, i.e., the bottom surface of the valve body 222 via the elastic 簧223与所述活塞本体21的底面相连,所述活塞本体21的底面与所述阀芯222相对应的位置设置有排出口211。 Spring 223 and the bottom surface of the piston body 21 is connected to a bottom surface of the piston body 21 of the valve body 222 is provided with a position corresponding to the discharge port 211.

图6为图5中所示的活塞本体21向上运动时,活塞单元2一侧的油液流通状态图;另一侧的油液流通状态相同,此处省略。 FIG 6 is an upward movement of the piston body 21 shown in FIG. 5, the oil flow state of FIG piston unit 2 side; the same oil flow state of the other side, will be omitted here. 当所述活塞本体21向上运动时,所述活塞本体21上方油液压迫所述阀芯222向下运动时,所述弹簧223将被压缩,所述流体孔2213与所述活塞本体21下方油液相连通,从而使所述活塞本体21上方的油液依次通过所述流体孔2213、所述卸荷孔2212与所述阀芯222之间的通路和排出口211与所述活塞本体21下方的油液相连通,进而实现卸荷和减振功能,油液流动方向如图6中虚线箭头所示。 When the upward movement of the piston body 21, the piston body 21 above the oil compression movement of the spool 222 downward, the spring 223 will be compressed, the fluid port 2213 and the piston body 21 below the oil liquid communication so that the upper piston body 21, the oil passes through the fluid hole 2213, the relief hole 211 below the piston body 21 and the outlet passage between the valve body 222 and 2212 communicating the oil, so as to realize a vibration reduction function and unloading, 6 dotted arrows in fluid flow direction as shown in FIG.

本申请的阀体组件22,通过在所述阀罩221上设置流体孔2213和卸荷孔2212来实现卸荷和减振功能,避免了现有技术中在所述阀芯122的盲孔1221侧壁上加工卸荷口1222时对所述阀罩121和阀芯122之间的形位公差的影响,保证了所述阀罩121与阀芯122之间的配合精度,进而使本申请阀体组件22具有稳定的质量和精度性能。 Valve assembly 22 of the present application, and the unloading is achieved by providing a vibration reduction function and the fluid holes 2213 2212 unloading apertures 221 in the valve housing, to avoid the prior art blind bore in the valve body 122 1221 processing unloading opening on the side wall of the valve housing 1222 when the influence of geometric tolerances between the valve body 121 and 122, to ensure the accuracy of fit between the valve cover 121 and valve body 122, thereby enabling the valve of the present application assembly 22 having a stable quality and accuracy performance.

此外,现有技术中的卸荷口1222设置于所述阀芯122盲孔1221的一侧,所述活塞本体11上方的油液均通过该卸荷口1222流入所述活塞本体11下方,所述油液流过所述卸荷口1222时不可避免地对所述卸荷口1222相对一侧的阀芯122的侧壁产生径向力,进而影响所述阀芯122的使用寿命;本申请的阀体组件22,所述活塞本体21上方的油液流过所述卸荷孔2212与所述阀芯222之间的通路时,是在圆周方向上均匀流过,所述油液对所述阀芯222产生的径向力相互抵消,避免了所述阀芯222的局部应力疲劳,进一步地提高了本申请阀体组件22的质量和使用寿命。 Further, the prior art unloading port 1222 is provided on a side of the valve body 122 of the blind hole 1221, the oil above the piston body 11 are unloading port 1222 through which flows under the piston body 11, the oil the flow through the unloading port inevitably radial force on the sidewall of the side opposite the unloading opening of the valve body 1222 122 1222, thereby affecting the service life of the valve element 122; the valve assembly of the present disclosure 22, oil above the piston body 21 flows through the passage between the release holes 2212 of the valve core 222, is uniformly in the circumferential direction of the flow through the valve body 222 of the oil radial forces cancel each other, to avoid local stress fatigue of the valve body 222, and further improve the quality of life of the valve assembly 22 of the present application.

如图5所示,所述阀芯222进一步设置有封油部2221,所述封油部2221位于所述阀罩221下方,所述封油部2221的顶面与所述阀罩221的底面相邻,调 节所述弹簧223的预紧力使所述封油部2221的顶面与所述阀罩221的底面贴合,使得当所述活塞本体21相对于油压减振器静止时,阻止所述卸荷孔2212与所述阀芯222之间的油液与所述阀芯222底部的油液连通。 5, the valve body 222 is further provided with an oil seal portion 2221, portion 2221 of the oil seal is located below the valve housing 221, the oil seal portion of the top surface of the bottom surface of the valve housing 221 2221 adjacent adjusting preload of the spring 223 causes the oil seal portion 2221 of the top surface of the valve housing 221 is bonded to the bottom surface, such that when the piston body 21 with respect to the stationary oil damper, preventing the unloading of oil and oil 222 at the bottom of the valve body between the bearing hole 2212 communicates with the valve body 222.

具体地,如图5所示,初始位置时,所述活塞本体21上方和下方的油液压力平衡,所述阀芯222套设于所述导向孔2211和卸荷孔2212中,所述卸荷孔2212与所述阀芯222之间通路通过所述流体孔2213与所述活塞本体21上方的油液相连通,所述封油部2221的顶面与所述阀罩221的底面相配合以封闭油路;如图6所示,当所述活塞本体21向上运动时,所述活塞本体21上方的油液压力增加,所述活塞本体21上方的油液压迫所述阀芯222和弹簧223,并使所述阀芯222向下运动和使所述弹簧223压缩,从而使所述封油部2221的顶面与所述阀罩221的底面分离,进而打开油路,即,所述活塞本体21上方的油液依次通过所述流体孔2213、所述卸荷孔2212与所述阀芯222之间的通路、所述封油部2221的顶面与所述阀罩221底面之间的通路流入所述阀芯222的底部,并最终通过所述排出口211流入所述活塞本体21 Specifically, as shown in FIG. 5, the initial position of the piston body 21 above and below the oil pressure balance of the valve body 222 sleeved on said unloading guide hole 2211 and hole 2212, the unloading passage 222 between the valve body bearing holes 2212 and 2213 through the fluid hole with oil above the piston body 21 communicating the oil sealing portion 2221 with a top surface of the bottom surface of the valve housing 221 mates 6, when the upward movement of the piston body 21, 21 of the fluid pressure above the piston body increases, compression fluid above the piston body 21 of the valve body 222 and the spring; to close the passage 223, and the downward movement of the valve body 222 and the compression spring 223, so that the oil seal portion of the top surface 2221 separated from the bottom surface of the valve housing 221, thereby opening passage, i.e., the fluid above the piston body 21 sequentially through the fluid holes 2213, the unload orifice passage between the valve body 222 and 2212, the oil seal portion of the top surface 2221 of the valve housing 221 between the bottom surface flows into the bottom of the valve body passage 222 and ultimately through the outlet 211 flows into the piston body 21 下方,使所述活塞本体21上方和下方的油液压力相平衡,达到卸荷和减振效果;当所述活塞本体21停止运动时,所述弹簧223的回复力使所述阀芯222向上运动,使所述封油部2221的顶面与所述阀罩221的底面再次贴合,从而使油路再次封闭。 Below, the piston body 21 above and below the oil pressure is balanced to achieve unloading and damping effect; when movement of the piston body 21 is stopped, the restoring force of the spring 223 causes the valve body 222 upwardly movement, the oil seal portion of the top surface 2221 of the bottom surface 221 of the valve cover bonded again, so that the passage is closed again.

如图7所示,作为一种优选的实施方式,所述阀芯222进一步设置有锥形部2222。 As shown in FIG 7, as a preferred embodiment, the valve body 222 is further provided with a tapered portion 2222. 如图8所示,所述锥形部2222套设于所述卸荷孔2212中,所述锥形部2222的外表面与所述卸荷孔2212的内表面之间形成油液通路,并与所述流体孔2213中的油液连通,从而可使所述活塞本体21上方的油液流过。 8, the tapered portion 2222 provided in the sleeve of relief holes 2212, the fluid passage is formed between the outer surface and the inner surface 2222 of the tapered portion of the relief aperture 2212, and said fluid communication with the oil hole 2213, thereby allowing the oil above the piston 21 flow through the body. 所述锥形部2222的尖端朝向所述导向孔2211。 The tapered tip portion 2222 toward the guide hole 2211. 图9为图8中所示的活塞本体21向上运动时,所述阀罩221和所述阀芯222中的油液流通状态图,所述活塞本体21向上运动,使得所述阀芯222在上方油液压力的作用下向下运动,所述封油部2221的顶面与所述阀罩221的底面分离,打开油路,并且所述锥形部2222的外表面与所述卸荷孔2212的内表面之间的油液通路面积逐渐增加,从而使该处流 过的油液量逐渐增加,避免了图6所示的未设置锥形部的阀芯222刚向下运动时,所述卸荷孔2212与所述阀芯222之间的通路即完全打开,使得油液流通量至最大而造成瞬间卸荷的情况,本实施方式中,通过设置所述锥形部2222实现了的阀体组件22平缓卸荷,进一步提高了质量稳定性。 9 is shown in FIG. 8 piston body 21 when the upward movement of the valve housing 221 and the valve body 222 in a state shown in FIG fluid flow, the upward movement of the piston body 21, so that the spool 222 downward movement under the action of the pressure above the oil, the oil seal portion of the top surface 2221 of the bottom surface 221 of the valve housing separated from the oil passage is opened, and the outer surface of the tapered portion 2222 of the release holes when the fluid passage area between the inner surface 2212 is gradually increased, so that where the amount of oil flowing gradually increased, the valve body 6 is avoided in the tapered portion 222 is not provided as shown just downward movement, the i.e. said release holes 2212 and fully open passage between the valve body 222, so that the oil circulation caused unloading instant case to a maximum, according to the present embodiment, by providing the tapered portion 2222 is realized gentle unloading valve assembly 22, to further improve the quality stability.

进一步地,随着所述阀芯222继续向下运动,所述弹簧223的压缩量增加,即,使本申请的阀体组件产生更大的阻尼效果,同时所述阀芯222的向下运动导致所述锥形部2222外表面与所述卸荷孔2212内表面之间的油液通路面积逐渐增加,该处流过的油液量逐渐增加,从而使得卸荷速度逐渐加快,使本申请的阀体组件22满足阻尼力与卸荷速度呈线性或类线性的要求。 Further, as the spool 222 continues to move downward, increasing the amount of compression of the spring 223, i.e., the valve body assembly of the present disclosure have a greater damping effect, while the downward movement of the spool 222 2222 results in the tapered portion with an outer surface area of ​​the fluid passage between the inner surface of the bearing hole 2212 of the discharge is gradually increased, where the amount of oil flowing gradually increased, so that the unloading speeds up the application of the present the valve assembly 22 and the damping force to meet the linear velocity or unloading linear requirements.

参见图5、图6、图8、图9,作为一种优选的实施方式,所述阀罩221进一步设置有储油腔2214,所述储油腔2214位于所述导向孔2211和卸荷孔2212之间,且所述储油腔2214的顶端分别与所述导向孔2211和流体孔2213相连通,所述储油腔2214的底端与所述卸荷孔2212相连通,因所述阀芯222与所述导向孔2211的精密间隙配合可实现精确导向功能并能够封闭油路,当所述阀芯222套设于所述导向孔2211和卸荷孔2212中时,所述活塞本体21上方的油液可通过所述流体孔2213与所述储油腔2214相连通,所述储油腔2214可缓冲所述阀芯222向下运动瞬间所述油液对所述锥形部2222外表面的冲击,进一步提高本申请阀体组件22的质量稳定性。 Referring to FIG 5, FIG 6, FIG 8, FIG 9, as a preferred embodiment, the valve cover 221 is further provided with a reservoir cavity 2214, the reservoir cavity 2214 and 2211 located in the guiding hole of relief holes between 2212 and 2214 the reserve chamber to the top of each of the guide holes 2211 and 2213 communicating the fluid hole, the bottom end of the reservoir cavity 2214 with the release holes 2212 communicating, by said valve core 222 and the guide precision mating clearance hole 2211 enables precise guiding function and capable of blocking the oil passage, when the valve body 222 sleeved on the guide holes 2211 and 2212 of relief holes, the piston body 21 fluid through the fluid above the hole 2213 may be the reserve chamber 2214 communicates the reservoir cavity 2214 may buffer the instantaneous movement of the valve body 222 downwardly tapered portion 2222 of the oil on the outer the impact surface, to further improve the quality stability of the valve assembly 22 of the present application.

参见图10,作为一种优选的实施方式,所述流体孔2213设置于所述导向孔2211圆周外部的周向环体内,且所述流体孔2213可设置为一个或者多个,以满足不同的卸荷和减振要求。 10, as a preferred embodiment, the fluid holes 2213 provided in the see FIG outer circumference of the guide hole 2211 within a circumferential ring, and the fluid holes 2213 may be provided as one or more, in order to meet different unloading and vibration requirements. 优选的,当所述流体孔2213为多个时,为了使卸荷过程中油液流通均匀,所述多个流体孔2213均匀分布于所述导向孔2211圆周外部的周向环体内。 Preferably, when the fluid is a plurality of holes 2213, in order to make the process of unloading a uniform fluid flow, the plurality of fluid apertures 2213 uniformly distributed in the outer circumference of the guide hole 2211 weeks in vivo to the ring.

参见图5、图7、图8、图9,作为一种优选的实施方式,所述阀芯222背离所述弹簧223的一端轴向设置有节流孔2223,所述阀芯222的相对另一端轴向设置有盲孔2224,所述节流孔2223与所述盲孔2224相连通。 Referring to Figure 5, 7, 8, 9, as a preferred embodiment, the valve body 222 away from the axial end of the spring 223 is provided with an orifice 2223 of the spool 222 relative to the other and one axial end provided with blind holes 2224, 2223 with the orifice communicating the blind bore 2224. 也就是说,所 述阀芯222朝向所述弹簧223的方向开设有盲孔2224,所述盲孔2224底部开设有所述节流孔2223。 That is, said valve element 222 toward a direction of the spring 223 defines a blind bore 2224, the bottom of the blind bore 2224 defines the orifice 2223. 当所述活塞本体21产生细微的向上运动,即所述活塞本体21上方的油液压力稍有增加,且该油液压力不足以克服所述弹簧223的弹力时,所述活塞本体21上方的油液可通过所述节流孔2223流入所述盲孔2224中,并通过所述活塞本体21上的排出口211流入活塞本体21下方,从而实现卸荷和减振效果。 When the piston body 21 generates a slight upward movement, i.e., the oil pressure 21 above the piston body is slightly increased, and the oil pressure is insufficient to overcome the spring force of the spring 223, the piston body 21 above oil through the orifice 2223 flow into the blind bore 2224, and below the piston 211 flows into the body 21 through the discharge outlet on the piston body 21, so as to achieve unloading and damping effect.

需要说明的是,参见图1和图2,现有技术中,所述阀芯122的盲孔1221的底端径向设置有节流孔1224,所述节流孔1224将所述盲孔1221中的油液与所述活塞本体11下方的油液连通,当所述活塞本体11产生细微的向上运动时,所述活塞本体11上方的油液可依次通过所述盲孔1221和节流孔1224流入活塞本体11下方,以实现卸荷和减振效果。 Incidentally, referring to FIGS. 1 and 2, the prior art, a valve body orifice 122 of the bottom end of the blind bore 1221 is provided with a radial 1224, the orifice of the blind hole 1224 to 1221 fluid communication with the fluid below the piston body 11, when the piston body 11 generates a slight upward movement of the oil above the piston body 11 may be sequentially passes through the blind bore and the orifice 1221 1224 flows into the lower piston body 11 to achieve unloading and damping effect. 但是因所述节流孔1224位于所述盲孔1221的底面,加工不方便,而且在加工所述节流孔1224时,需要夹持住所述阀芯122与所述阀罩121通孔1211相配合的外表面,不可避免地会影响所述阀芯122外表面与所述通孔1211内表面的配合精度。 However, due to the bottom surface of the orifice 1224 is located in the blind hole 1221, the processing is not convenient, and during processing of the orifice 1224, the valve body 122 need clamped to the valve housing 121 with a through hole 1211 mating an outer surface, inevitably affect the accuracy of fit of the valve body 122 and the inner surface of the outer surface of the through hole 1211.

本申请的阀体组件22,通过在所述阀芯222的顶端设置节流孔2223,通过所述节流孔2223和盲孔2224使所述活塞本体21上下方的油液相连通,所述节流孔2223设置在所述阀芯222的顶端,不仅加工方便,而且在加工所述节流孔2223时,只需夹持住所述阀芯222最底端的外表面即可,该处的外表面是非配合表面,进而不会影响本申请阀体组件22的配合精度,进一步提高了本申请阀体组件22的质量和精度的稳定性。 The valve assembly 22 of the present application, by providing the orifice 222 at the top of the valve body 2223, so that the piston body 2224 through an orifice 2223 and the blind hole 21 communicating the oil below the orifice 2223 is provided in the top of the valve body 222, is not only easy to process, but also during processing of the orifice 2223 to only the outer surface of clamp 222 at the bottom of the valve body most live, where the outer mating surface is the surface, and thus does not affect the accuracy of fit of the valve assembly 22 of the present application, to further improve the quality and accuracy of the valve body 22 of the stability of the assembly of the present application.

为了进一步提高本申请阀体组件22的密封性能,所述阀罩221与所述活塞本体21螺纹连接的螺纹副处涂抹有螺纹密封胶,以保证所述阀罩221安装到位后位置稳固,并且提高了螺纹副的密封性能,进一步提高了本申请阀体组件22的质量稳定性。 To further improve the sealing performance of the valve assembly 22 of the present application, the valve housing 221 and the piston body 21 Deputy Commissioner threaded screw connection with a thread sealant applicator to ensure that the valve housing 221 in place of the stable position, and improve the sealing performance of the sub-screw, further improving the stability of the quality of the valve assembly 22 of the present application.

如图3、图4,本申请进一步提出一种活塞单元2,设置于油压减振器中,包括活塞本体21,所述活塞本体21上设置有前述的阀体组件22。 3, FIG. 4, the present application further provides a piston unit 2, the hydraulic shock absorber is provided, comprising a piston body 21, there is disposed the valve body assembly 22 on the piston body 21.

作为一种优选的实施方式,所述阀体组件22轴向设置于所述活塞本体21的顶部和底部,所述活塞本体21底部的阀体组件22与所述活塞本体21顶部的阀体组件相互背离设置。 As a preferred embodiment, the valve assembly 22 disposed in the axial direction of the piston top and the bottom of the body 21, the top of the piston body 22 and the valve assembly 21 of valve assembly 21 at the bottom of the piston body disposed away from each other.

进一步的,为了使本申请的活塞单元2顺利实现双向卸荷和减振功能,所述活塞本体21顶部的阀体组件22与所述活塞本体21底部的阀体组件22在轴向上相互交错设置。 Further, in order to make the present application the smooth two-way piston unit 2 and unloading damping function, the top of the valve assembly of the piston body 21 and the bottom 22 of the body 21 of the piston valve assembly 22 are interleaved in the axial direction settings.

如图3所示,所述活塞本体21顶部的阀体组件22可设置为一个或者多个,以满足不同的减振要求。 As shown in FIG. 3, the top of the piston assembly of the valve body 21 or 22 may be provided as a plurality of damping to meet different requirements. 优选的,当所述活塞本体21顶部的阀体组件22设置为多个时,所述多个阀体组件22沿周向均匀分布于所述活塞本体21的顶部,以增加本申请活塞本体21向上运动时,活塞单元2卸荷和减振过程中的稳定性。 Preferably, when the top of the valve body assembly 22 of the piston body 21 is set to a plurality of said plurality of body assembly 22 uniformly distributed circumferentially on the top of the piston body 21, in order to increase the piston body 21 of the present application when the upward movement of the piston unit 2 and damper unloading process stability.

进一步地,所述活塞本体21底部的阀体组件22可设置为一个或者多个,以满足不同的减振要求。 Further, the valve assembly of the piston body 21 of the bottom 22 may be provided as one or more, in order to meet different requirements of damping. 优选的,当所述活塞本体21底部的阀体组件22设置为多个时,所述多个阀体组件22沿周向均匀分布于所述活塞本体21的底部,以增加活塞本体21向下运动时,本申请活塞单元2卸荷和减振过程中的稳定性。 Preferably, when the valve body assembly at the bottom of the body 21 of the piston 22 is set to a plurality of said plurality of body assembly 22 circumferentially evenly distributed at the bottom of the piston body 21, piston body 21 in order to increase the downward motion, charge stability of the present application and damper piston unit 2 during unloading.

以下,以所述活塞本体21顶部的阀体组件22和底部的阀体组件22在所述活塞本体21的径向上交错设置,且所述阀体组件22的阀芯222设置有锥形部2222为例,说明所述活塞单元2的工作过程,所述活塞本体21的剖面图如图11、图12所示。 Hereinafter, the top of the valve body assembly 21 of the piston body 22 and the bottom 22 of the valve assembly arranged staggered radially on the piston body 21, and the spool 222 of the valve assembly 22 is provided with a tapered portion 2222 as an example, the operation process of the piston unit 2 is a cross sectional view of the piston body 21 in FIG. 11, 12 shown in FIG.

如图11所示,当所述活塞本体21向上运动时,所述活塞本体21上方的油液压力增加并压迫所述活塞本体21顶部阀体组件22的阀芯222,使其相对于所述活塞本体21下降并压缩弹簧223,从而使所述阀芯222的封油部2221顶面与所述阀罩221底面分离,如图11中虚线所示,所述活塞本体21上方的油液依次通过所述流体孔2213、储油腔2214、锥形部2222与卸荷孔2212之间通路、所述封油部2221的顶面与所述阀罩221底面之间的通路流入所述阀芯222的底部,最终经所述排出口211流入所述活塞本体21下方,实现卸荷和减振效果。 As shown, when the upward movement of the piston body 21, the fluid pressure above the piston body 21 of the spool 11 increases and presses the top of the piston body 21 of the valve body 22 of the assembly 222, so with respect to the piston body 21 is lowered and compresses the spring 223, so that the valve body 222 of the oil seal surface 2221 of the bottom surface of the valve housing 221 separate, as shown, the fluid sequentially piston body 21 above the broken line 11 in FIG. 2213 through the fluid orifice, the reservoir cavity 2214, the tapered portion the passage between unloading apertures 2212 and 2222, the oil seal portion of the top surface of the valve 2221 between the cover path 221 flows into the bottom surface of the valve body bottom 222, 211 ultimately flows under the piston body through the discharge port 21, and to achieve a damping effect unloading. 所述活塞本体21顶部的多个阀体组件22中,其中一个或者多个的阀芯222顶 部设置节流孔2223,当所述活塞本体21向上运动引起的活塞本体21上方油液压力的增加不足以压缩弹簧223时,所述活塞本体21上方油液依次通过所述节流孔2223和盲孔2224流入所述活塞本体21下方,以实现卸荷和减振效果。 The piston body 21 at the top of the plurality of body assembly 22, one or more of the top of the valve body 222 is provided an orifice 2223, when the oil pressure increases above the piston body 21 of the piston 21 caused by the upward movement of the body when insufficient to compress spring 223, the piston body 21 above the fluid sequentially flows under the piston body 21 through the orifice 2223 and 2224 blind holes, in order to achieve unloading and damping effect. 此过程中,所述活塞本体21底部的阀体组件22不发生作用。 In this process, the valve assembly 21 at the bottom of the piston body 22 does not play a role.

如图12所示,当所述活塞本体21向下运动时,所述活塞本体21下方的油液压力增加并压迫所述活塞本体21底部阀体组件22的阀芯222,使其相对于所述活塞本体21上升并压缩弹簧223,从而使所述阀芯222的封油部2221底面与所述阀罩221顶面分离,如图12中虚线所示,所述活塞本体21下方的油液依次通过所述流体孔2213、储油腔2214、锥形部2222与卸荷孔2212之间通路、所述封油部2221的底面与所述阀罩221顶面之间的通路流入所述阀芯222的上部,最终经所述排出口211流入所述活塞本体21上方,实现卸荷和减振效果。 12, when the downward movement of the piston body 21, the oil pressure below the piston body 21 and presses the valve body 222 to increase the body of the piston valve assembly 22 of the bottom 21, so that with respect to said piston body 21 rises and the compression spring 223, the valve body 222 so that the oil seal portion 2221 of the bottom surface of the valve housing 221 separating surface, the broken line shown in FIG. 12, the oil beneath the piston body 21 sequentially 2213, 2214 oil chamber, the tapered portion the passage between unloading aperture 2212 and 2222, the path between the bottom surface of the oil seal portion 2221 and the surface 221 of the valve housing through the fluid flow into the valve orifice upper core 222 and eventually through the outlet 211 flows into the upper piston body 21, and to achieve a damping effect unloading. 所述活塞本体21底部的多个阀体组件22中,其中一个或者多个的阀芯222底部设置节流孔2223,当所述活塞本体21向下运动引起的活塞本体21下方油液压力的增加不足以压缩弹簧223时,所述活塞本体21下方油液依次通过所述节流孔2223和盲孔2224流入所述活塞本体21上方,以实现卸荷和减振效果。 Said plurality of body assembly 21 at the bottom of the piston body 22 in which one or more of the bottom valve body 222 is provided an orifice 2223, when the oil pressure below the piston body 21 of the piston body 21 causes downward movement of the It is insufficient to increase the compression spring 223, the piston body 21 below oil 2224 flows successively over the piston body 21 through the orifice 2223 and blind holes, in order to achieve unloading and damping effect. 此过程中,所述活塞本体21顶部的阀体组件22不发生作用。 In this process, the top of the piston assembly of the valve body 2122 does not play a role.

如图13所示,本申请进一步提出一种油压减振器3,包括工作缸31,所述工作缸31中设置有前述的活塞单元2。 13, the present application further provides a hydraulic shock absorber 3, comprising a cylinder 31, the cylinder 31 is provided with a piston unit 2 of the foregoing. 在此不再细述。 In this no longer dwell on.

Claims (10)

  1. 一种阀体组件(22),设置于油压减振器的活塞本体(21)上,包括阀罩(221),以及可活动地套设于所述阀罩(221)内部的阀芯(222),所述阀罩(221)的外表面与所述活塞本体(21)连接,所述阀罩(221)设置有导向孔(2211),所述阀芯(222)套设于所述导向孔(2211)中,所述阀芯(222)与所述导向孔(2211)间隙配合以封闭油路;所述阀芯(222)与所述活塞本体(21)弹性连接,其特征在于:所述阀罩(221)背离所述导向孔(2211)的一端设置有卸荷孔(2212),所述阀罩(221)上设置所述导向孔(2211)的一端进一步设置有流体孔(2213),所述流体孔(2213)与所述卸荷孔(2212)相连通; One kind of assembly on the valve body (22), provided in the hydraulic damper piston body (21), comprising a valve housing (221), and a sleeve movably disposed in said valve housing (221) inside the valve body ( 222), an outer surface of said valve housing (221) and said piston body (21), said valve housing (221) is provided with a guide hole (2211), said valve element (222) disposed in said sleeve guide hole (2211), the spool (222) and said guide hole (2211) to close the gap with the passage; said valve body (222) elastically connected to said piston body (21), characterized in that : one end of the valve housing (221) facing away from the guide hole (2211) is provided with a relief hole (2212), said valve cover bore fluid (221) is provided the guide hole (2211) is further provided on one end (2213), said fluid aperture (2213) of the unloading opening (2212) in communication;
    所述阀芯(222)进一步套设于所述卸荷孔(2212)中,所述阀芯(222)的外表面与所述卸荷孔(2212)的内表面间隙配合以流通油液。 A gap between the inner surface of the valve body (222) is further sleeved on the release holes (2212), the outer surface of said valve body (222) and said relief hole (2212) to fit the flow of oil.
  2. 根据权利要求1所述的阀体组件(22),其特征在于:所述阀芯(222)进一步设置有可与所述阀罩(221)相配合以封闭油路的封油部(2221),所述封油部(2221)设置于所述阀罩(221)下方,所述封油部(2221)的顶面与所述阀罩(221)的底面贴合。 The valve assembly (22) according to claim 1, wherein: said valve element (222) is further provided with said valve housing (221) cooperating to close the oil passage of the seal portion (2221) the oil seal portion (2221) disposed within the valve housing (221) below the top surface of the oil seal portion (2221) of the valve housing (221) is bonded to the bottom surface.
  3. 根据权利要求1所述的阀体组件(22),其特征在于:所述阀芯(222)进一步设置有锥形部(2222),所述锥形部(2222)套设于所述卸荷孔(2212)中,所述锥形部(2222)与所述卸荷孔(2212)间隙配合以流通油液。 The valve assembly (22) according to claim 1, wherein: said valve element (222) is further provided with a tapered portion (2222), the tapered portion (2222) sleeved on said unloading hole (2212), the tapered portion (2222) of the unloading opening (2212) in a clearance fit fluid flow.
  4. 根据权利要求3所述的阀体组件(22),其特征在于:所述阀罩(221)进一步设置有储油腔(2214),所述储油腔(2214)的顶端分别与所述导向孔(2211)和流体孔(2213)相连通,所述储油腔(2214)的底端与所述卸荷孔(2212)相连通。 The valve assembly (22) according to claim 3, wherein: said valve housing (221) is further provided with a reservoir chamber (2214), to the top of the reservoir chamber (2214), respectively the guide bottom hole (2211) and a fluid hole (2213) in communication, said reservoir chamber (2214) with the relief hole (2212) in communication.
  5. 根据权利要求1所述的阀体组件(22),其特征在于:所述阀芯(222)背离所述活塞本体(21)的一端轴向设置有节流孔(2223),所述阀芯(222)的相对另一端轴向设置有盲孔(2224),所述节流孔(2223)与所述盲孔(2224)相连通。 The valve assembly (22) according to claim 1, wherein: said valve body (222) facing away from the piston body (21) is provided at one end an axial orifice (2223), said valve body (222) axially opposite other end provided with a blind hole (2224), said orifice (2223) of the blind hole (2224) in communication.
  6. 一种活塞单元(2),设置于油压减振器中,包括活塞本体(21),其特征在于:所述活塞本体(21)上设置有如权利要求1-5任一项所述的阀体组件(22)。 One kind of piston unit (2), provided in a hydraulic shock absorber, comprising a piston body (21), characterized in that: setting like valve of claim any one of claims 1-5 on said piston body (21) assembly (22).
  7. 根据权利要求6所述的活塞单元(2),其特征在于:所述阀体组件(22)轴向设置于所述活塞本体(21)的顶部和底部。 The piston unit (2) according to claim 6, wherein: said valve assembly (22) axially disposed on the top and bottom of the piston body (21).
  8. 根据权利要求7所述的活塞单元(2),其特征在于:所述活塞本体(21)顶部的阀体组件(22)与所述活塞本体(21)底部的阀体组件(22)在轴向上相互交错设置。 The piston unit (2) according to claim 7, wherein: said piston body (21) at the top of the valve body assembly (22) and the piston body (21) at the bottom of the valve body assembly (22) in the shaft each staggered upwardly.
  9. 根据权利要求8所述的活塞单元(2),其特征在于:所述活塞本体(21)顶部的阀体组件(22)沿周向分布于所述活塞本体(21)的顶部;所述活塞本体(21)底部的阀体组件(22)沿周向分布于所述活塞本体(21)的底部。 The piston unit according to claim 8 (2), characterized in that: said piston valve body assembly (22) top (21) circumferentially distributed on the top of the piston body (21); said piston the body (21) the valve assembly (22) circumferentially distributed at the bottom of the bottom of the piston body (21).
  10. 一种油压减振器(3),包括工作缸(31),其特征在于:所述工作缸(31)中设置有活塞单元(2),所述活塞单元(2)上设置有如权利要求1-5任一项所述的阀体组件(22)。 For a hydraulic damper (3), comprising a cylinder (31), characterized in that: said cylinder (31) is provided with a piston unit (2), said piston unit (2) is provided on the like as claimed in claim 1-5 according to any one of the valve assembly (22).
PCT/CN2017/101224 2017-06-28 2017-09-11 Valve assembly, piston unit and oil damper WO2019000646A1 (en)

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CN107143603B (en) * 2017-06-28 2019-01-25 中车青岛四方车辆研究所有限公司 Valve component, piston unit and oil-pressure damper

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