WO2019154316A1 - 一种带有组合套筒的液压减震活塞及液压减震器 - Google Patents

一种带有组合套筒的液压减震活塞及液压减震器 Download PDF

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Publication number
WO2019154316A1
WO2019154316A1 PCT/CN2019/074398 CN2019074398W WO2019154316A1 WO 2019154316 A1 WO2019154316 A1 WO 2019154316A1 CN 2019074398 W CN2019074398 W CN 2019074398W WO 2019154316 A1 WO2019154316 A1 WO 2019154316A1
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Prior art keywords
piston
cylinder
throttle
groove
hydraulic shock
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PCT/CN2019/074398
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English (en)
French (fr)
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郭怀宝
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郭怀宝
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Publication of WO2019154316A1 publication Critical patent/WO2019154316A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details

Definitions

  • the utility model relates to a hydraulic damping piston with a combined sleeve and a hydraulic shock absorber, belonging to the technical field of hydraulic shock absorption.
  • Hydraulic shock absorption is a common damping method in the automotive field.
  • the output end of the hydraulic shock absorber of the automobile and the body are respectively mounted on the vehicle body and the wheel, and the shock absorber piston is arranged in the automobile shock absorber.
  • the piston reciprocates in the piston cylinder.
  • the valve mechanism is arranged in the piston, so when the piston reciprocates, the hydraulic oil on both sides of the piston reciprocates through the piston through the overflow hole in the piston in the opposite direction to the piston, thereby damping the piston. .
  • the moving speed of the piston in the automobile shock absorber is proportional to the degree of the automobile, that is, the greater the vibration amplitude of the automobile, the faster the reciprocating motion of the piston, and the faster the speed of the piston through which the hydraulic oil flows.
  • the degree of the automobile that is, the greater the vibration amplitude of the automobile, the faster the reciprocating motion of the piston, and the faster the speed of the piston through which the hydraulic oil flows.
  • the piston is still adjusted according to the vibration of the vehicle body, and it is easy to cause a sudden change in the distance between the wheel and the body to cause damage to the automobile.
  • the electronic control system can realize The effect of controlling the flow rate of the hydraulic oil when the pressure changes very shortly, but the electronic control system is expensive and the control process is complicated. Therefore, designing a hydraulic shock absorber for automobiles that has a slow increase in flow rate or a constant flow rate after the pressure is increased to a certain value has become an urgent problem to be solved.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a throttling groove, which is to achieve throttling when the piston body moves greatly, thereby reducing the damping effect and opening the throttle groove.
  • the hydraulic damping piston and the hydraulic shock absorber with the combined sleeve are greatly reduced in process difficulty.
  • the hydraulic damping piston with the combined sleeve comprises a piston barrel filled with hydraulic oil, the piston body is provided with a piston body, one end of the piston rod is connected with the piston body, and the other end is connected
  • the piston rod drives the piston body to reciprocate in the piston cylinder, and the piston cylinder is formed by the inner cylinder of the piston cylinder and the outer cylinder of the piston cylinder, and is opened on the inner cylinder of the piston cylinder.
  • the throttle groove is a through groove penetrating the inner cylinder of the piston tube, and the throttle groove communicates both sides of the piston body, and the total cross-sectional area of the throttle groove is from the central portion to the axial direction of the piston tube The end gradually decreases.
  • the throttle groove is axially opened along the inner cylinder of the cylinder.
  • the inner cylinder of the cylinder is provided with one.
  • the throttle slot is a narrow and uniform straight slot, and the throttle slot is provided with a plurality of slots, and the plurality of throttle slots are evenly distributed along the circumferential direction of the inner cylinder of the piston cylinder, and the axial lengths of the plurality of throttle slots are different. .
  • the throttle groove is provided in plurality, and the plurality of throttle grooves are evenly distributed along the circumferential direction of the inner cylinder of the piston cylinder, and the axial lengths of the plurality of throttle grooves are different.
  • the plurality of throttle grooves are located on the same circumference in a circumferential line of the inner circumference of the cylinder.
  • the inner cylinder of the cylinder is provided with a plurality of tubes, and the length of the throttle groove on the inner cylinder of the same cylinder is the same, and the throttle grooves on the inner cylinders of the plurality of cylinders are overlapped from the outside and inside. The outer length is reduced in turn.
  • the throttle groove is a through groove which is gradually narrowed on both sides of the middle width.
  • a common through hole extending in the axial direction is formed on the piston body.
  • the utility model relates to a hydraulic shock absorber, which is characterized in that: a shock absorber outer cylinder is arranged on the outer side of the piston cylinder, and an outer oil chamber of the shock absorber is formed between the outer cylinder of the shock absorber and the piston cylinder, and the piston cylinder The bottom is connected to the outer tube of the shock absorber.
  • the present invention has the following beneficial effects:
  • the piston body realizes the throttling when the movement of the piston body is greatly moved, the damping effect is slowed down, and the throttle groove is opened. On the inner cylinder of the cylinder, the process difficulty is greatly reduced.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of a hydraulic damping piston with a combined sleeve.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 3 is a cross-sectional view taken along line B-B of Figure 1;
  • Figure 4 is a schematic view of the structure of a hydraulic shock absorber with a combined sleeve.
  • Figure 5 is a schematic view showing the structure of a hydraulic damping piston with a combined sleeve.
  • Piston rod 1. Piston cylinder 3. Piston body 4. Piston cylinder outer cylinder 5. Piston cylinder inner cylinder 6. Throttle groove 7. Shock absorber outer cylinder.
  • a hydraulic shock absorbing piston with a combined sleeve includes a piston barrel 2 , which is a cylinder closed at both ends.
  • the inner cavity of the piston barrel 2 is a piston chamber, and the piston chamber is filled. Full of hydraulic oil.
  • a piston body 3 is disposed in the piston chamber, and the piston body 3 is in close contact with the interior of the piston chamber.
  • One end of the piston rod 1 is connected at the center of the piston body 3, and the other end is taken out from any end of the cylinder barrel 2.
  • the piston body 3 reciprocates in the piston chamber under the driving of the piston rod 1.
  • the piston barrel 2 is composed of a cylindrical inner cylinder 5 and a cylindrical outer cylinder 4, and the outer wall of the inner cylinder 5 of the cylinder is closely fitted with the inner wall of the outer cylinder 4 of the cylinder, and the inside of the cylinder
  • the cartridge 5 may be sequentially provided in plurality as needed. In the present embodiment, only one inner cylinder 5 is provided.
  • a plurality of throttle grooves 6 are defined in the inner cylinder 5 of the piston cylinder.
  • the throttle groove 6 is a straight groove which is opened in the axial direction of the inner cylinder 5 of the piston cylinder and has a uniform width.
  • the throttle groove 6 penetrates the cylinder of the inner cylinder 5 of the piston cylinder.
  • the wall, the depth of the throttle groove 6, is the wall thickness of the inner cylinder 5 of the cylinder.
  • the throttle groove 6 is uniformly formed in the circumferential direction of the inner cylinder 5 of the cylinder barrel and the axial lengths of all the throttle grooves 6 are different. All the throttle grooves 6 are located on the same circumference in the circumferential line of the cylinder inner cylinder 5 in the circumferential direction, and the circumference is defined as the initial position of the piston body 3.
  • the shock absorber outer cylinder 7 is placed on the outer side of the piston cylinder 2 to form a hydraulic shock absorber with a combined sleeve.
  • the piston cylinder 2 serves as an inner cylinder of the shock absorber, and the shock absorber outer cylinder 7
  • the upper port is sealed with the piston barrel 2
  • the outer cylinder of the shock absorber outer cylinder 7 and the cylinder barrel 2 forms an outer oil chamber of the hydraulic shock absorber, and the piston chamber in the piston cylinder 2 becomes the inner oil chamber of the hydraulic shock absorber.
  • a conventional through hole or valve body is provided at the bottom of the piston barrel 2 to achieve communication between the inner oil chamber and the outer oil chamber.
  • body damping it can be achieved either by means of a hydraulic damping piston with a combined sleeve or by a hydraulic shock absorber with a combined sleeve.
  • the piston rod 1 and the piston barrel 2 are respectively fixed at the body of the automobile and the wheel assembly.
  • a slight vibration occurs at the body and the wheel assembly, a relative movement between the piston rod 1 and the piston barrel 2 occurs, and at this time, the piston body 3 is During the movement of the piston chamber, during the movement of the piston body 3, the hydraulic oil in the piston chamber flows from one side of the piston body 3 to the other side through the throttle groove 6, and the hydraulic oil circulates when flowing through the throttle groove 6.
  • the area receives the restriction of the throttle groove 6, which slows down the moving speed of the piston body 3, thereby achieving a shock absorbing effect.
  • the piston body 3 When a large vibration occurs between the automobile body and the wheel assembly, the piston body 3 will move largely in the piston chamber under the driving of the piston rod 1. Since the length of the throttle groove 6 is different, the piston body 3 Moving in the piston chamber to the end, the number of the throttle grooves 6 cooperating with the piston body 3 is less and less, that is, the flow area of the hydraulic oil is getting smaller and smaller, thereby achieving the effect of slowing down the degree of shock absorption.
  • the throttle groove 6 is not designed as a straight groove along the axial direction of the inner cylinder 5 of the cylinder, but is designed to be wide in the middle and gradually narrow at both ends.
  • the groove therefore, during the gradual movement of the piston body 3, since the throttle groove 6 is gradually narrowed, the effect of the smaller hydraulic oil flow area is also exerted, further reducing the degree of shock absorption.
  • the throttle grooves 6 may be the same length or length, and may be different in length.
  • the difference between this embodiment and the first embodiment is that in the present embodiment, the through-opening through hole is formed in the axial direction of the piston body 3, and the effect of assisting the oil fluid can be achieved.
  • the difference between this embodiment and the embodiment 1 is that, as shown in FIG. 5, in the embodiment, the inner cylinder 5 of the cylinder barrel is sequentially sleeved with a plurality of lengths of the throttle groove 6 on the inner cylinder 5 of the same cylinder. Similarly, the throttle grooves 6 on the inner cylinders 5 of the plurality of cylinders are overlapped from the outside and the inside, and the lengths are sequentially decreased from the inside to the outside. Therefore, the inner and outer grooves of the throttle grooves 6 on all the inner cylinders 5 of the cylinder tube form a middle deep two. In the process of gradually moving the piston body 3, the throttle groove 6 gradually becomes shallow, so that the flow area of the hydraulic oil is also reduced, and the degree of shock absorption is further slowed down.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

一种带有组合套筒的液压减震活塞，包括充满液压油的活塞筒（2），活塞筒（2）内设置有活塞本体（3），活塞杆（1）一端连接活塞本体（3），另一端自活塞筒（2）端口引出，活塞杆（1）带动活塞本体（3）在活塞筒（2）内往复运动，活塞筒（2）由活塞筒内筒（5）和活塞筒外筒（4）内外套设而成，在活塞筒内筒（5）上开设有至少一条节流槽（6），节流槽（6）为穿透活塞筒内筒（5）的通透槽，节流槽（6）将活塞本体（3）的两侧连通，节流槽（6）的横截面积总和沿活塞筒（2）轴向由中部向两端逐渐减小。一种液压减震器，由带有组合套筒的液压减震活塞制成。通过设置节流槽，使活塞本体在大幅度移动时实现了节流，减缓了减震效果，同时将节流槽开设在活塞筒内筒上，降低了工艺难度。

Description

一种带有组合套筒的液压减震活塞及液压减震器 技术领域
一种带有组合套筒的液压减震活塞及液压减震器，属于液压减震技术领域。
 背景技术
液压减震是汽车领域一种常见的减震方式。在汽车液压减震器的输出端和本体分别安装在车身和车轮上，在汽车减震器中设置有减震器活塞，当汽车在行驶过程中出现上下震动时，活塞在活塞缸中往复运动，在活塞中设置有阀片机构，因此当活塞往复运动时，位于活塞两侧的液压油均会以与活塞相反的方向通过活塞上的过流孔往复流经活塞，从而起到减震作用。
在现有技术中，汽车减震器中活塞的移动速度与汽车的程度成正比，即汽车的震动幅度越大，活塞往复运动的速度越快，液压油流经的活塞的速度也越快。然而汽车在行驶过程中会出现震动突变的情况，如车轮触碰到较大的障碍物或车轮突然陷入坑中，在发生上述情况时，车身与车轮之间的间距短时间内迅速变大，因此在这种情况下活塞依然按照车身的震动情况进行减震调节，则很容易会出现车轮与车身之间的间距突然变化而使汽车发生损坏，在现有技术中，通过电控系统可以实现压力短时间变化非常大时对液压油的流量进行控制的效果，但是电控系统价格较为昂贵且控制过程较为复杂。因此设计一种在压力增大到一定值后流量要缓慢增大或者流量保持不变，甚至是减小的汽车液压减震器成为目前亟待解决的问题。
 技术问题
本发明要解决的技术问题是：克服现有技术的不足，提供一种通过设置节流槽，是活塞本体在大幅度移动时实现了节流，减缓了减震效果，同时将节流槽开设在活塞筒内筒上，大大降低了工艺难度的带有组合套筒的液压减震活塞及液压减震器。
 技术解决方案
本发明解决其技术问题所采用的技术方案是：该带有组合套筒的液压减震活塞，包括充满液压油的活塞筒，活塞筒内设置有活塞本体，活塞杆一端连接活塞本体，另一端自活塞筒端口引出，活塞杆带动活塞本体在活塞筒内往复运动，其特征在于：所述的活塞筒由活塞筒内筒和活塞筒外筒内外套设而成，在活塞筒内筒上开设有至少一条节流槽，节流槽为穿透活塞筒内筒的通透槽，节流槽将活塞本体的两侧连通，节流槽的横截面积总和沿活塞筒轴向由中部向两端逐渐减小。
优选的，节流槽沿所述活塞筒内筒轴向开设。
优选的，所述的活塞筒内筒设置有一个。
优选的，所述的节流槽为宽窄均匀的直槽，节流槽设置有多条，多条节流槽沿活塞筒内筒周向均匀分布，且多条节流槽轴向长度相异。
优选的，节流槽设置有多条，多条节流槽沿活塞筒内筒周向均匀分布，且多条节流槽轴向长度相异。
优选的，所述的多条节流槽在活塞筒内筒周向上的中线位于同一个圆周上。
优选的，所述的活塞筒内筒设置有多个，在同一个活塞筒内筒上的节流槽长度相同，多个活塞筒内筒上的节流槽由外而内重叠开设且由内而外长度依次减小。
优选的，所述的节流槽为中间宽两侧逐渐变窄的通透槽。
优选的，在所述的活塞本体上开设有轴向贯穿的常通孔。
一种液压减震器，其特征在于：在所述的活塞筒的外侧密封套装有减震器外筒，减震器外筒与活塞筒之间间隔形成减震器的外油腔，活塞筒底部与减震器外筒连通。
 有益效果
与现有技术相比，本发明所具有的有益效果是：
在本带有组合套筒的液压减震活塞及液压减震器中，通过设置节流槽，是活塞本体在大幅度移动时实现了节流，减缓了减震效果，同时将节流槽开设在活塞筒内筒上，大大降低了工艺难度。
当活塞本体会活塞杆的带动下在活塞腔内发生大幅度移动，由于节流槽的长短不一，因此随着活塞本体在活塞腔内向尽头处移动，与活塞本体配合的节流槽的数量越来越少，即液压油的流动面积越来越小，因此起到了减缓减震程度的效果。
 附图说明
图1为带有组合套筒的液压减震活塞实施例1结构示意图。
图2为图1中A-A方向剖视图。
图3为图1中B-B方向剖视图。
图4为带有组合套筒的液压减震器结构示意图。
图5为带有组合套筒的液压减震活塞实施例4结构示意图。
其中：1、活塞杆  2、活塞筒  3、活塞本体  4、活塞筒外筒  5、活塞筒内筒  6、节流槽  7、减震器外筒。
 本发明的最佳实施方式
图1~4是本发明的最佳实施例，下面结合附图1~5对本发明做进一步说明。
如图1所示，一种带有组合套筒的液压减震活塞，包括活塞筒2，活塞筒2为两端封闭的圆筒，在活塞筒2的内腔为活塞腔，活塞腔中填满有液压油。在活塞腔中设置有活塞本体3，活塞本体3与活塞腔内部紧密接触。活塞杆1一端连接在活塞本体3的中心处，另一端自活塞筒2任意一端引出，活塞本体3在活塞杆1的带动下在活塞腔中往复运动。
如图2~3所示，活塞筒2由活塞筒内筒5和活塞筒外筒4内外套设组成，活塞筒内筒5的外壁与活塞筒外筒4的内壁紧密贴合，活塞筒内筒5可根据需要依次套设多个，在本实施例中，活塞筒内筒5只设置有一个。
在活塞筒内筒5上开设有多条节流槽6，节流槽6为沿活塞筒内筒5轴向开设且宽度均匀的直槽，节流槽6穿透活塞筒内筒5的筒壁，节流槽6的深度即为活塞筒内筒5的壁厚。节流槽6沿活塞筒内筒5周向均匀开设且所有节流槽6的轴向长度相异。所有节流槽6在活塞筒内筒5周向上的中线位于同一个圆周上，并将该圆周定义为活塞本体3的初始位置。
如图4所示，在活塞筒2的外侧套装减震器外筒7，形成带有组合套筒的液压减震器，此时活塞筒2作为减震器的内筒，减震器外筒7上端口处与活塞筒2密封设置，减震器外筒7与活塞筒2之间间隔形成液压减震器的外油腔，活塞筒2中的活塞腔成为液压减震器的内油腔，在活塞筒2的底部设置常规的通孔或阀体实现内油腔和外油腔之间的连通。
在进行车身减震时，可以利用带有组合套筒的液压减震活塞单独实现也可以利用带有组合套筒的液压减震器实现。
具体工作过程及工作原理如下：
活塞杆1以及活塞筒2分别固定在汽车的车身以及车轮总成处，当车身与车轮总成处出现轻微震动时，活塞杆1与活塞筒2之间发生相对移动，此时活塞本体3在活塞腔内移动，活塞本体3在移动的过程中，活塞腔内的液压油会经过节流槽6自活塞本体3的一侧流向其另一侧，液压油在流经节流槽6时流通面积收到节流槽6的限制，减缓了活塞本体3的移动速度，因此实现了减震效果。
当汽车车身与车轮总成之间发生较大震动时，活塞本体3会在活塞杆1的带动下在活塞腔内发生大幅度移动，由于节流槽6的长短不一，因此随着活塞本体3在活塞腔内向尽头处移动，与活塞本体3配合的节流槽6的数量越来越少，即液压油的流动面积越来越小，因此起到了减缓减震程度的效果。
实施例2：
本实施例与实施例1的区别在于：在本实施例中，节流槽6不设计为沿活塞筒内筒5轴向的直槽，而设计为中间宽，两端逐渐变窄的通透槽，因此当活塞本体3逐渐移动的过程中，由于节流槽6逐渐变窄，因此也起到了较小液压油流通面积的效果，进一步减缓了减震程度。
在本实施例中，节流槽6可以长短相同，也可以长短相异。
实施例3：
本实施例与实施例1的区别在于：在本实施例中，在活塞本体3的轴向上开设贯穿的常通孔，可以起到辅助油液流体的效果。
实施例4：
本实施例与实施例1的区别在于：如图5所示，在本实施例中，活塞筒内筒5依次套设有多个，在同一个活塞筒内筒5上的节流槽6长度相同，多个活塞筒内筒5上的节流槽6由外而内重叠开设且由内而外长度依次减小，因此所有活塞筒内筒5上的节流槽6内外配合形成中间深两端依次变浅的整体节流槽，因此活塞本体3逐渐移动的过程中，由于节流槽6逐渐变浅，因此也起到了较小液压油流通面积的效果，进一步减缓了减震程度。
以上所述，仅是本发明的较佳实施例而已，并非是对本发明作其它形式的限制，任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型，仍属于本发明技术方案的保护范围。

Claims (10)

  1. 一种带有组合套筒的液压减震活塞，包括充满液压油的活塞筒（2），活塞筒（2）内设置有活塞本体（3），活塞杆（1）一端连接活塞本体（3），另一端自活塞筒（2）端口引出，活塞杆（1）带动活塞本体（3）在活塞筒（2）内往复运动，其特征在于：所述的活塞筒（2）由活塞筒内筒（5）和活塞筒外筒（4）内外套设而成，在活塞筒内筒（5）上开设有至少一条节流槽（6），节流槽（6）为穿透活塞筒内筒（5）的通透槽，节流槽（6）将活塞本体（3）的两侧连通，节流槽（6）的横截面积总和沿活塞筒（2）轴向由中部向两端逐渐减小。
  2. 根据权利要求1所述的带有组合套筒的液压减震活塞，其特征在于：节流槽（6）沿所述活塞筒内筒（5）轴向开设。
  3. 根据权利要求2所述的带有组合套筒的液压减震活塞，其特征在于：所述的活塞筒内筒（5）设置有一个。
  4. 根据权利要求3所述的带有组合套筒的液压减震活塞，其特征在于：节流槽（6）为宽窄均匀的直槽，节流槽（6）设置有多条，多条节流槽（6）沿活塞筒内筒（5）周向均匀分布，且多条节流槽（6）轴向长度相异。
  5. 根据权利要求4所述的带有组合套筒的液压减震活塞，其特征在于：所述的节流槽（6）设置有多条，多条节流槽（6）沿活塞筒内筒（5）周向均匀分布，且多条节流槽（6）轴向长度相异。
  6. 根据权利要求4所述的带有组合套筒的液压减震活塞，其特征在于：所述的多条节流槽（6）在活塞筒内筒（5）周向上的中线位于同一个圆周上。
  7. 根据权利要求1所述的带有组合套筒的液压减震活塞，其特征在于：所述的活塞筒内筒（5）设置有多个，在同一个活塞筒内筒（5）上的节流槽（6）长度相同，多个活塞筒内筒（5）上的节流槽（6）由外而内重叠开设且由内而外长度依次减小。
  8. 根据权利要求2所述的带有组合套筒的液压减震活塞，其特征在于：所述的节流槽（6）为中间宽两侧逐渐变窄的通透槽。
  9. 根据权利要求1所述的带有组合套筒的液压减震活塞，其特征在于：在所述的活塞本体（3）上开设有轴向贯穿的常通孔。
  10. 一种利用权利要求1~9任一项所述的带有组合套筒的液压减震活塞制成的液压减震器，其特征在于：在所述的活塞筒（2）的外侧密封套装有减震器外筒（7），减震器外筒（7）与活塞筒（2）之间间隔形成减震器的外油腔，活塞筒（2）底部与减震器外筒（7）连通。
     
PCT/CN2019/074398 2018-02-12 2019-02-01 一种带有组合套筒的液压减震活塞及液压减震器 WO2019154316A1 (zh)

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CN109780117A (zh) * 2019-04-03 2019-05-21 郭怀宝 一种阻尼可调的液压减振活塞及液压减振器
CN113201978B (zh) * 2021-05-08 2022-07-19 中电建路桥集团有限公司 一种适用于隧道的减震防沉降地铁轨道
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