JPS601008A - Car height adjusting damper - Google Patents

Car height adjusting damper

Info

Publication number
JPS601008A
JPS601008A JP11037683A JP11037683A JPS601008A JP S601008 A JPS601008 A JP S601008A JP 11037683 A JP11037683 A JP 11037683A JP 11037683 A JP11037683 A JP 11037683A JP S601008 A JPS601008 A JP S601008A
Authority
JP
Japan
Prior art keywords
cylinder
cap
gas chamber
seal member
pressure
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
Application number
JP11037683A
Other languages
Japanese (ja)
Inventor
Yuji Ichikawa
裕二 市川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokico Ltd
Original Assignee
Tokico Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokico Ltd filed Critical Tokico Ltd
Priority to JP11037683A priority Critical patent/JPS601008A/en
Publication of JPS601008A publication Critical patent/JPS601008A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16F9/36Special sealings, including sealings or guides for piston-rods
    • F16F9/362Combination of sealing and guide arrangements for piston rods

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

PURPOSE:To prevent the inflow of the gas in a gas chamber into a cylinder without increasing the tightening margin of a seal member by providing a check valve between the seal member of a piston rod guide section and its cap in a shock absorber concurrently using an oil hydraulic damper and an air spring. CONSTITUTION:A V-groove 32 is annularly formed on the end surface of a seal member 31 facing the tip slant section 23C of a cap 23, and the peripheral portion from the V-groove 32 position is formed as the valve member 33 of a check valve. Thereby, when a large load is applied, a high pressure is introduced into a gas chamber 20 to adjust the car height. This high pressure is applied to the seal member 31 through a gap between the rod insertion hole 23D of the cap 23 and a piston rod 4. Then, the pressure is applied to the V-groove 32, the valve member 33 is flexed outward and brought into contact by pressure with the inner circumferential surface of the small diameter section 23B of the cap 23. Accordingly, this infiltrating high pressure does not infiltrate behond the seal member 31, thus its inflow into the cylinder can be prevented.

Description

【発明の詳細な説明】 本発明は油圧緩衝器と空気ばねとを一体に組込んでなる
車高調整用緩衝器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle height adjusting shock absorber that integrates a hydraulic shock absorber and an air spring.

第1図ないし第3図に従来技術による車高調整用緩衝器
を示す。
1 to 3 show a shock absorber for adjusting vehicle height according to the prior art.

まず第1図において、1は外筒IAと該外筒IA内に挿
入して設けた円筒IBとからなる2重筒式のシリンダを
示し、該シリンダ1の一端はボトムキャップ2によシ施
蓋されている。そして、シリンダ1の内筒IB内にはピ
ストン3が往復動可能に挿嵌されておシ、該ピストン3
によシ内筒IB内は2つの油室A、Bに画成されている
。4はピストンロッドを示し、該ピストンロッド4の一
端はピストン3に連結固着されており、他端はシリンダ
1の他端に設けたロッドガイド5を貫通して外部に突出
せしめられている。また、外筒IAと円筒IBとの間に
は環状の補給室Cが形成されており、該補給室C内には
油液が収容されると共に、ピストンロッド4の縮小時に
その進入体積分を補償するための空2が入っている。
First, in FIG. 1, reference numeral 1 indicates a double-tube type cylinder consisting of an outer cylinder IA and a cylinder IB inserted into the outer cylinder IA, and one end of the cylinder 1 is attached to a bottom cap 2. It's covered. A piston 3 is fitted into the inner cylinder IB of the cylinder 1 so as to be able to reciprocate.
The interior of the inner cylinder IB is defined into two oil chambers A and B. Reference numeral 4 designates a piston rod, one end of which is connected and fixed to the piston 3, and the other end of which passes through a rod guide 5 provided at the other end of the cylinder 1 and projects to the outside. Further, an annular replenishment chamber C is formed between the outer cylinder IA and the cylinder IB, and the replenishment chamber C accommodates oil, and when the piston rod 4 is contracted, its entering volume is There is a blank 2 for compensation.

ピストン3にはピストンロッド4の伸長時に油室Aから
油室Bに向は流れる油液に対して抵抗力を発生させる伸
長側減衰力発生機構6が設けられている。該減衰力発生
機構6としては公知のものが適宜用いられるが、図面に
おいてはピストンロッド4の軸方向に摺動可能に設けた
リテーナ6Aとディスクバルブ6Bとからなるものが示
されている0そして)ピストンロッド4と共にピストン
3が伸長方向に変位し、油室A内が高圧になると、この
圧力がリテーナ6Aに設けた油路7を介してディスク・
々ルプ6Bに作用し、これが所定の圧力になると該ディ
スクパルf6Bの内周縁がリテーナ6Aから離間する方
向に撓められて、該リテーナ6Aとディスクバルブ6B
との間に隙間が形成されることになる。このために、油
塞A内の高圧油は当該隙間を介してピストン3に穿設し
た油路8から油室Bに向けて油液が流れるが、このとき
にディスクバルブ6Bのばね力によシ定まる所定の減衰
力が発生する。一方、縮小行程時にはディスクバルブ6
Bおよびリテーナ6Aはばね9に抗して図中左方に変位
し、パルプガイド1oに形成したスリット溝にょシ油室
A、B間が連通し、油室Bから油室Aに向けて流れる油
液に抵抗力が発生することはない。
The piston 3 is provided with an extension-side damping force generation mechanism 6 that generates a resistance force against the oil flowing in the direction from the oil chamber A to the oil chamber B when the piston rod 4 is expanded. Any known damping force generating mechanism 6 may be used as appropriate, but the drawings show one consisting of a retainer 6A and a disc valve 6B that are slidably provided in the axial direction of the piston rod 4. ) When the piston 3 is displaced in the extension direction together with the piston rod 4 and the inside of the oil chamber A becomes high pressure, this pressure is transferred to the disk via the oil passage 7 provided in the retainer 6A.
When the pressure reaches a predetermined level, the inner peripheral edge of the disc valve f6B is bent in a direction away from the retainer 6A, and the retainer 6A and the disc valve 6B are
A gap will be formed between them. For this reason, the high-pressure oil in the oil block A flows from the oil passage 8 bored in the piston 3 to the oil chamber B through the gap, but at this time, the spring force of the disc valve 6B causes the oil to flow. A predetermined damping force is generated. On the other hand, during the reduction stroke, the disc valve 6
B and the retainer 6A are displaced to the left in the figure against the spring 9, and the slit groove formed in the pulp guide 1o communicates between the oil chambers A and B, and the oil flows from the oil chamber B to the oil chamber A. No resistance is generated in the oil.

また、油室Bと補給室Cとの間には油室B内に位置して
ボトム部材11が設けられておシ、該ボトム部材11に
は油室Bと補給室Cとの間を常時連通させる油路12が
設けられ、またピストンロッド4の縮小行程時に油室B
内の油液が補給室Cに向は流れるときに抵抗力を発生さ
せる縮小側減衰力発生機構13が設けられている。該減
衰力発生機構13は前述の伸長側減衰力発生機構6とほ
ぼ同様の構成を有するもので、パルプガイド14に半径
方向に位置決めされて軸方向に変位可能なリテーナ13
Aとディスクバルブ13Bとで構成され、油室B内が高
圧となったときにリテーナ13Aに設けた油路15を介
して圧力がディスクバルブ13Bに作用し、この圧力が
所定値を越えるとディスクバルブ13.Bの内周縁がリ
テーナ13Aから離間する方向に撓められて油室B内の
油液が補給室Cに向は流れるが、このときに油圧抵抗力
が発生するようになっている。一方、ピストンロッド4
が伸長するときにはリテーナ13Aおよびディスクバル
ブ13Bは図中左方に変位し、補給室C内の油液はパル
プガイドに設けたスリット溝を介して油室B内に抵抗力
を生じることなく流入する。
Further, a bottom member 11 is provided between the oil chamber B and the supply chamber C, and is located in the oil chamber B. An oil passage 12 is provided to communicate with the oil chamber B during the contraction stroke of the piston rod 4.
A reduction-side damping force generation mechanism 13 is provided that generates a resistance force when the oil inside flows toward the supply chamber C. The damping force generation mechanism 13 has almost the same configuration as the above-mentioned extension side damping force generation mechanism 6, and includes a retainer 13 positioned in the radial direction on the pulp guide 14 and movable in the axial direction.
A and a disc valve 13B, when the pressure inside the oil chamber B becomes high, pressure acts on the disc valve 13B via the oil passage 15 provided in the retainer 13A, and when this pressure exceeds a predetermined value, the disc valve 13B Valve 13. The inner peripheral edge of B is bent in the direction away from the retainer 13A, and the oil in the oil chamber B flows toward the supply chamber C, but at this time, hydraulic resistance is generated. On the other hand, piston rod 4
When the pulp guide extends, the retainer 13A and the disc valve 13B are displaced to the left in the figure, and the oil in the supply chamber C flows into the oil chamber B through the slit groove provided in the pulp guide without creating any resistance. .

前述のようにして油圧緩衝器が構成されるが、次に空気
ばねについて説明する。
Although the hydraulic shock absorber is constructed as described above, the air spring will now be explained.

図中16はアウタシェルを示し、該アウタシェル16は
その一端がピストンロッド4のシリンダ1外に突出する
端部に固着して設けられ、他端部はシリンダ1に向は突
出し、該シリンダ1の先端部を覆うようになっている。
In the figure, 16 indicates an outer shell, and one end of the outer shell 16 is fixed to the end of the piston rod 4 that protrudes outside the cylinder 1, and the other end protrudes toward the cylinder 1. It is designed to cover the entire area.

そして、アウタシェル16の当該他端部にはダイヤフラ
ム17の一端が取付バンド18によシ固着され、該ダイ
ヤフラム17の他端部はシリンダ1の外筒Iへ表面に取
付バンド19によ)固着され、該アウタシェル16およ
びダイヤフラム17の内部に社伸縮可能なガス室20が
形成され、該ガス室2o内には外部カラ圧縮空包等の加
圧ガスがアウタシェル16に設けた継手21およびガス
導入口22を介して導入されるように構成されている。
One end of a diaphragm 17 is fixed to the other end of the outer shell 16 by a mounting band 18, and the other end of the diaphragm 17 is fixed to the surface of the outer cylinder I of the cylinder 1 by a mounting band 19. A telescopic gas chamber 20 is formed inside the outer shell 16 and the diaphragm 17, and a pressurized gas such as an external compressed air bag is supplied to the gas chamber 2o through a joint 21 provided on the outer shell 16 and a gas inlet. 22.

次に、23はキャップを示し、該キャップ23はその基
端部23Aが外筒IAとロッドガイド5との間に挿嵌さ
れて該外筒IAに固着して設けられ・またその先端側に
は小径部23Bが形成されると共に内方に向けて傾斜す
る先端傾斜部23Cが形成されている。さらに1キヤツ
プ23め先端部にはピストンロッド4を挿通するロッド
挿通穴23Dが設けられている。また、24はシリンダ
1内部とガス室20との間を気液密に保持するためにピ
ストンロッド4に嵌合して設けたシール部材を示し、該
シール部材24は円環状の弾性部材で形成され、その外
周面および一側の端面は前記キャップ23の小径部23
B内周面および先端傾斜部23Cの内壁と当接している
。また、シール部材24の内周面は軸方向に波形となる
ように形成され、その突出部分がピストンロッド4の外
周面と当接するようになっている。さらに、シール部材
24の他側の端面、即ちロッドガイド5と対面する側の
端面には、ばね座25が設けられ、該ばね座25とロッ
ドガイド5との間にはシール部材24をキャップ23お
よびピストンロッド4と当接する方向に押圧するばね2
6が張設されている。さらに、ロッドガイド5にはその
外周縁部にはピストンロッド4とロットガイド5との間
の隙間から漏出した油室A内の油液を補給室Cに還流さ
せるための切欠溝27が設けられている。
Next, 23 indicates a cap, and the cap 23 is provided so that its proximal end 23A is inserted between the outer cylinder IA and the rod guide 5 and fixed to the outer cylinder IA. In addition to forming a small diameter portion 23B, a distal end slope portion 23C that slopes inward is formed. Furthermore, a rod insertion hole 23D through which the piston rod 4 is inserted is provided at the tip of the first cap 23. Further, 24 indicates a sealing member fitted to the piston rod 4 to maintain air-liquid tightness between the inside of the cylinder 1 and the gas chamber 20, and the sealing member 24 is formed of an annular elastic member. The outer peripheral surface and one end surface of the cap 23 are connected to the small diameter portion 23 of the cap 23.
It is in contact with the inner circumferential surface of B and the inner wall of the tip inclined portion 23C. Further, the inner circumferential surface of the seal member 24 is formed to have a corrugated shape in the axial direction, and a protruding portion thereof comes into contact with the outer circumferential surface of the piston rod 4. Further, a spring seat 25 is provided on the other end surface of the seal member 24, that is, the end surface facing the rod guide 5, and the seal member 24 is placed between the spring seat 25 and the rod guide 5. and a spring 2 that presses in the direction of contact with the piston rod 4.
6 is stretched. Further, the rod guide 5 is provided with a cutout groove 27 on its outer peripheral edge for allowing the oil in the oil chamber A leaking from the gap between the piston rod 4 and the rod guide 5 to flow back to the supply chamber C. ing.

なお、第1図中28はピストンロッド4の先端に形成し
た車体への取付部、29はぎトムキャップ2に設けた車
台への取付部、をそれぞれ示す。
In FIG. 1, reference numeral 28 indicates a mounting portion formed on the tip of the piston rod 4 to the vehicle body, and 29 indicates a mounting portion provided on the tom cap 2 to the vehicle chassis.

従来技術による車高調整用緩衝器は前述の構成を有する
もので、取付部29を車台に取付け、また取付部28を
車体に取付けて車両に発生する振動の緩衝と車高の調整
との両機能を発揮するようになっている。
The vehicle height adjustment shock absorber according to the prior art has the above-mentioned configuration, in which the mounting portion 29 is attached to the vehicle chassis, and the mounting portion 28 is attached to the vehicle body, thereby buffering vibrations generated in the vehicle and adjusting the vehicle height. It is designed to perform its functions.

而して、振動の緩衝はピストンロッド4の伸縮時に伸長
側減衰力発生機構6および縮小側減衰力発生機構13が
それぞれ作用し、油室Aから油室Bに向は流れる油液お
よび油室Bから補給室Cに向は流れる油液に抵抗力を発
生させることにょシ行なわれる。
Therefore, when the piston rod 4 expands and contracts, the expansion-side damping force generation mechanism 6 and the contraction-side damping force generation mechanism 13 act to buffer the vibrations, and the oil flowing from the oil chamber A to the oil chamber B and the oil chamber The direction from B to supply chamber C is carried out by creating a resistance force in the flowing oil.

次に、車体に乗員、積荷等の荷重が増減すると車高が変
化することになるが、空気ばねはかかる荷重の変化に対
しても車高をほぼ一定に保たせる機能を発揮する。即ち
、車体の荷重が増大すると、ガス室20内には圧縮空気
が供給され\該ガス室20を膨張させる。これによシピ
ストンロッド4が伸長して車体が上昇する。一方、車体
の;重が減少すると、ガス室20内の圧縮空気を排 す
ることによシピストンロッド4が縮小せしめられ、車体
が低下する。このように、車体に対する荷重の増減に応
じてガス室20内に圧縮空気を給排させる仁とにより車
高の調整作用が行なわれる。
Next, as the load of passengers, cargo, etc. increases or decreases on the vehicle body, the vehicle height changes, but the air spring has the function of keeping the vehicle height approximately constant even when the load changes. That is, when the load on the vehicle body increases, compressed air is supplied into the gas chamber 20 and the gas chamber 20 is expanded. This causes the piston rod 4 to extend and the vehicle body to rise. On the other hand, when the weight of the vehicle body decreases, the compressed air in the gas chamber 20 is exhausted, causing the piston rod 4 to contract, thereby lowering the vehicle body. In this way, the vehicle height is adjusted by supplying and discharging compressed air into the gas chamber 20 in response to increases and decreases in the load on the vehicle body.

ところで、シリンダ1の内部は該シリンダ1のピストン
ロッド4導出側端部に設けたシール部材24によシ気液
密に保たれ、該シリンダ1内の補給室C内に封入した空
気や油液がガス室20に漏出したり、ガス室20内の圧
縮空気が該補給室C内に侵入するのを防止している。し
かしながら、車体の荷重時に車高を所定のレベルに保つ
ために高圧の圧縮空気がガス室20内に供給されると、
その圧力がピストンロッド4の外周面とキャップ23の
ロッド挿通穴23Dとの間の隙間を介してシール部材2
4に作用する。一方、油圧緩衝器として機能するシリン
ダ1内にはボトム部材11が設けられ、該♂トム部材1
1に縮小側減衰力発生機構13が設けられているから、
補給室C内の空気圧は比較的低圧の状態になっている。
Incidentally, the inside of the cylinder 1 is kept air- and liquid-tight by a seal member 24 provided at the end of the piston rod 4 outlet side of the cylinder 1, and the air and oil sealed in the supply chamber C in the cylinder 1 are kept air-tight. This prevents gas from leaking into the gas chamber 20 and compressed air within the gas chamber 20 from entering the supply chamber C. However, when high-pressure compressed air is supplied into the gas chamber 20 to maintain the vehicle height at a predetermined level when the vehicle body is loaded,
The pressure is applied to the sealing member 2 through the gap between the outer peripheral surface of the piston rod 4 and the rod insertion hole 23D of the cap 23.
4. On the other hand, a bottom member 11 is provided in the cylinder 1 that functions as a hydraulic shock absorber, and the male tom member 1
1 is provided with the reduction side damping force generation mechanism 13,
The air pressure in the supply chamber C is in a relatively low pressure state.

仁のために、ガス室20内の圧力が補給室C内の圧力よ
シ高圧となシ、その間の差圧がばね26のばねよシも大
きい場合には、シール部材24は該ばね26に抗してキ
ヤ、7″23から離間してロッドガイド5に近接する方
向に移動することがある。このために、第3図に示した
ようにキャップ23とシール部材24との間に隙間が形
成され、同図に矢印で示したようにガス室20内の圧縮
空気がこの隙間を介して侵入し、ロットガイド5に設け
た切欠溝27から補給室C内に流入することになる。こ
の結果、該補給室C内の圧力が上昇することになシ、こ
の圧力がシール部材24に作用し、該シール部材24は
キャラf23の先端傾斜部23Cに押圧されると共にそ
の内周が縮径される方向に変形せしめられることになる
から、その内周面のピストンロッド4に対する圧着力が
増大し、該ピストンロッド4の伸縮時における摩擦抵抗
が増大する等の欠点がある。
If the pressure in the gas chamber 20 is higher than the pressure in the replenishment chamber C, and the differential pressure therebetween is also greater than that of the spring 26, the sealing member 24 will close to the spring 26. The gear may move away from the 7" 23 and closer to the rod guide 5. Therefore, as shown in FIG. 3, a gap is created between the cap 23 and the seal member 24. The compressed air in the gas chamber 20 enters through this gap and flows into the replenishment chamber C from the cutout groove 27 provided in the lot guide 5, as shown by the arrow in the figure. As a result, the pressure in the supply chamber C does not increase, and this pressure acts on the sealing member 24, and the sealing member 24 is pressed against the tip inclined portion 23C of the character f23, and its inner periphery is reduced in diameter. As a result, the pressing force of the inner circumferential surface of the piston rod 4 against the piston rod 4 increases, resulting in disadvantages such as an increase in frictional resistance when the piston rod 4 expands and contracts.

本発明は斜上の点に鑑みてなされたもので、シール部材
の締め代を大きくすることなくガス室内の高圧ガスがシ
リンダ内に流入するのを確実に防止し得るようにした車
高調整用緩衝器を提供することを目的とするものである
The present invention has been made in view of the problem of slanting, and is a vehicle height adjustment device that can reliably prevent high-pressure gas in the gas chamber from flowing into the cylinder without increasing the tightening margin of the sealing member. The purpose is to provide a buffer.

前述の目的を達成するために、本発明に係る車高調整用
緩衝器は、シリンダのピストンロッド導出側端部に設け
られるシール部材と該シール部材を位置決めするための
キャップとの間にガス室からシリンダ内にガスが流入す
るのを防止する逆止弁を設ける構成としたことをその特
徴とするものである。
In order to achieve the above-mentioned object, the vehicle height adjustment shock absorber according to the present invention includes a gas chamber between a sealing member provided at the piston rod lead-out side end of the cylinder and a cap for positioning the sealing member. It is characterized by a structure in which a check valve is provided to prevent gas from flowing into the cylinder.

基づき説明する。I will explain based on this.

まず第4図および第5図は本発明の第1の実施例を示す
もので、同図において第1図と同一構成要素については
同一符号を付してその説明を省略するものとする。
First, FIGS. 4 and 5 show a first embodiment of the present invention, and in these figures, the same components as those in FIG.

然るに、31はシール部材を示し、該シール部材31に
はキャップ23の先端傾斜部23Cと対面する側の端面
の外周側部位にV溝32が円環状に形成されている。そ
して、シール部材3工の該V溝32形成位置よシ外周側
部分は逆止弁の弁部材33を構成するもので、V溝32
内に圧力が作用したときには該弁部材33は外方に撓ん
でキャップ23の小径部23B内周面に圧接されるよう
に構成されている。
However, 31 indicates a sealing member, and a V-groove 32 is formed in an annular shape on the outer peripheral side of the end face of the sealing member 31 facing the tip inclined portion 23C of the cap 23. The outer circumferential portion of the seal member 3 from the position where the V groove 32 is formed constitutes the valve member 33 of the check valve.
When pressure is applied inside, the valve member 33 is configured to bend outward and come into pressure contact with the inner circumferential surface of the small diameter portion 23B of the cap 23.

本実施例は前述のように構成されるもので、次にその作
動について説明する。
This embodiment is constructed as described above, and its operation will be explained next.

まず、車両が軽荷重の状態にあるときにはガス室20内
の圧力も低く、このためにシール部材31ははね26の
作用にょ夛キャップ23の先端傾斜部23Cの内壁およ
び小径部23Bの内周面に当接せしめられ、またその内
周部に形成した波形の突出部分がピストンロッド4の外
周面に当接した状態に保持される。このため、シリンダ
1の内部は気液密に保たれて該シリンダ1がらガス室2
0に空気や油液が漏出することはなく、またシリンダl
内にガス室2o内の圧縮空気が侵入することもない。こ
の点については前述した従来技術によるものと格別差異
はない。
First, when the vehicle is under a light load, the pressure inside the gas chamber 20 is low, and therefore the sealing member 31 is affected by the action of the spring 26 on the inner wall of the tip inclined portion 23C of the cap 23 and on the inner periphery of the small diameter portion 23B. The piston rod 4 is brought into contact with the outer peripheral surface of the piston rod 4, and the wavy protruding portion formed on the inner peripheral portion thereof is held in contact with the outer peripheral surface of the piston rod 4. Therefore, the inside of the cylinder 1 is kept gas-liquid tight, and the gas chamber 2
There is no leakage of air or oil to the cylinder l.
The compressed air in the gas chamber 2o does not enter into the gas chamber 2o. In this respect, there is no particular difference from the prior art described above.

然るに、車体に乗員、積荷等の大きな荷重が作用すると
、車高を調整するためにガス室2o内に高圧の圧縮空気
が導入される。この圧力はキャップ23のロッド挿通穴
23Dとピストンロッド4との間の隙間を介してシール
部材31に作用し、該シール部材31をばね26に抗し
てロッドガイド5に近接する方向に移動せしめられよう
とする。
However, when large loads such as passengers and cargo are applied to the vehicle body, high-pressure compressed air is introduced into the gas chamber 2o to adjust the vehicle height. This pressure acts on the sealing member 31 through the gap between the rod insertion hole 23D of the cap 23 and the piston rod 4, and moves the sealing member 31 in a direction approaching the rod guide 5 against the spring 26. Trying to get caught.

しかしながら、シール部材31がキャップ23の先端傾
斜部23Cから離間すると、ガス室2o内の圧力がV溝
32内に作用し、弁部材33は拡開する方向に撓められ
る。この結果、弁部材33はキャッf2.3CD小径部
23B内周面に圧接され、ガス室20とシリンダlとの
間のシール性が良好に保たれる。そして、ガス室2o内
の圧力が高くなればなるほど弁部材33はキャップ23
の小径部23B内周面への圧接力が大きくなるから、ガ
ス室20内の圧縮空気のシリンダ1内への流入は確実に
防止することができる。ここで、V溝32はシール部材
31の外周側に位置させて設けたがら、該V溝32に圧
力が作用すると、■溝32の外周側部分に形成した弁部
材33は確実に外方に撓み、■溝32の、内周側部分が
縮径する方向に撓んで、その内周縁部がピストンロッド
4に圧着することはない。
However, when the seal member 31 separates from the tip inclined portion 23C of the cap 23, the pressure within the gas chamber 2o acts within the V-groove 32, and the valve member 33 is bent in the direction of expansion. As a result, the valve member 33 is brought into pressure contact with the inner circumferential surface of the cap f2.3CD small diameter portion 23B, and good sealing performance between the gas chamber 20 and the cylinder l is maintained. The higher the pressure inside the gas chamber 2o, the more the valve member 33
Since the pressing force against the inner circumferential surface of the small diameter portion 23B is increased, the compressed air in the gas chamber 20 can be reliably prevented from flowing into the cylinder 1. Here, although the V-groove 32 is provided to be located on the outer circumferential side of the seal member 31, when pressure is applied to the V-groove 32, the valve member 33 formed on the outer circumferential side of the groove 32 is surely bent outward. , (2) The inner peripheral side portion of the groove 32 is bent in the direction of diameter reduction, and the inner peripheral edge thereof is not pressed against the piston rod 4.

次に、第6図は本発明の第2の実施例を示すもので、本
実施例においてはシール部材41にハソの内周縁からキ
ャップ23の先端傾斜部23Cに対面する側の端部近傍
に半径方向外方に向けV溝42が形成されている。そし
て、シール部材41の該V溝42よシキャップ23の先
端傾斜部23C側の部分が逆止弁の弁部材43を形成す
る。
Next, FIG. 6 shows a second embodiment of the present invention. In this embodiment, a sealing member 41 is attached from the inner peripheral edge of the hook to the vicinity of the end facing the tip inclined portion 23C of the cap 23. A V-groove 42 is formed radially outward. The portion of the seal member 41 on the side of the tip inclined portion 23C of the V-groove 42 and the cap 23 forms a valve member 43 of the check valve.

前述のように構成することによっても、ガス室20内が
高圧となIv溝42にその圧力が作用すると、弁部材4
3がキャップ23の先端傾斜部23Cの内壁に圧接せし
められることになるか執ガス室20内の圧縮空気が補給
室C内に侵入するのを確実に防止することができる。し
かも、シール部制41の肩部41Aに■溝を形成する構
造とはなっておらず、図面に示したように丸味が付けら
れているから、そのキャップ23への装着時に破損音生
じさせることがなく、組付性が良好である。
Even with the above-described configuration, when the high pressure inside the gas chamber 20 acts on the Iv groove 42, the valve member 4
3 is brought into pressure contact with the inner wall of the tip inclined portion 23C of the cap 23, and the compressed air in the gas chamber 20 can be reliably prevented from entering the supply chamber C. Furthermore, the shoulder portion 41A of the seal member 41 does not have a structure in which a groove is formed, but is rounded as shown in the drawing, so that when it is attached to the cap 23, a breakage sound may be generated. There is no problem, and the assembly is easy.

さらに、第7図は本発明の第3の実施例を示すもので 
本実施例では逆止弁をシール部竺24とは別体に形成し
た円環状の弾性弁部材51で構成されている。そして、
該弾性弁部材51はその外周側の部位がキャップ23の
先端傾斜部23Cの内壁に焼付は等の手段で固着され、
内周部がリップ状の弁部51Aとなっている。そして、
該弾性弁部@51の弁部51Aの内径はピストンロッド
4の外径より僅かに小径となっている。
Furthermore, FIG. 7 shows a third embodiment of the present invention.
In this embodiment, the check valve is constituted by an annular elastic valve member 51 formed separately from the seal portion 24. and,
The outer peripheral portion of the elastic valve member 51 is fixed to the inner wall of the inclined tip portion 23C of the cap 23 by baking or other means,
The inner peripheral portion is a lip-shaped valve portion 51A. and,
The inner diameter of the valve portion 51A of the elastic valve portion @51 is slightly smaller than the outer diameter of the piston rod 4.

前述のように構成することによっても、ガス室20内が
高圧になると弾性弁部材51の弁部51Aがシール部材
24に圧接されるから、その間のシールが確実に行なわ
れる。しかも、弁部51Aの内周縁部はピストンロッド
4に常時当接した状態に保持されるから、該弁部51A
はちシよけリップとしての機能を発揮し、ガス室20内
の塵埃がシリンダ1耳蓋入するのが防止される。
With the above-described structure, when the pressure inside the gas chamber 20 becomes high, the valve portion 51A of the elastic valve member 51 is brought into pressure contact with the sealing member 24, so that the sealing therebetween is ensured. Moreover, since the inner circumferential edge of the valve portion 51A is kept in constant contact with the piston rod 4, the valve portion 51A
It functions as a bee protection lip and prevents dust in the gas chamber 20 from entering the ear flap of the cylinder 1.

なお、本発明に係る車高調整用緩衝器は第1図に示した
構造のものに限らず、複筒式のシリンダを有し、ピスト
ンロッドの伸長方向および縮小方向またはそのいずれか
一方の変位に対し減衰力を発生させる減衰力発生機構を
備えた油圧緩衝器と車高の調整を行なう空気ばねと全組
合せたものであれば、減衰力発生機構等の構造は任意に
形成することができるものである。また、第1.第2の
実施例に示したV溝31.41に代えてU溝等を採用す
ることもできる。さらに、弁部材33゜43はシール部
材31.41とそれぞれ一体に形成する必要はなく、弁
部材33.43を別体に形成してシール部材31.41
に固着するようにしてもよい。
Note that the vehicle height adjustment shock absorber according to the present invention is not limited to the one having the structure shown in FIG. The structure of the damping force generating mechanism etc. can be formed as desired as long as it is a complete combination of a hydraulic shock absorber equipped with a damping force generating mechanism that generates a damping force against the vehicle height and an air spring that adjusts the vehicle height. It is something. Also, 1st. Instead of the V-grooves 31 and 41 shown in the second embodiment, a U-groove or the like may be used. Further, the valve members 33.43 do not need to be formed integrally with the seal members 31.41, respectively, but the valve members 33.43 may be formed separately and the seal members 31.41
It may be fixed to.

以上詳細に説明した如く、本発明に係る車高調整用緩衝
器はキャップとシール部材との間に逆止弁を設ける構成
としたから、空気ばねを形成するガス室内が高圧になっ
ても該ガス室内の高圧ガスがシリンダ内に流入するのを
確実に防止することができる。しかも、シール部材に大
きな締め代を設ける必要がないから、該シール部材のキ
ャップへの装着2組付けが容易にな夛、ピストンロッド
の伸縮動作時の摩擦抵抗が減少する。
As explained in detail above, since the vehicle height adjustment shock absorber according to the present invention has a structure in which a check valve is provided between the cap and the sealing member, even if the gas chamber forming the air spring becomes high pressure, High pressure gas in the gas chamber can be reliably prevented from flowing into the cylinder. Furthermore, since it is not necessary to provide a large interference margin to the seal member, the seal member can be easily attached to the cap, and the frictional resistance during the expansion and contraction operations of the piston rod is reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図ないし第3図は従来技術を示すもので、第1図は
車高調整用緩衝器の縦断面図、第2図は第1図の要部拡
大図、第3図は作動説明図、第4図および第5図は本発
明の第1の実施例金示し、第4図は第3図と同様の断面
図、第5図はシール部材の平面図、第6図および第7図
はそれぞれ本発明の第2.第3の実施例を示す第3図と
同様の断面図である。 1・・・シリンダ、IA・・・外筒、IB・・・円筒、
3・・・ピストン、4・・・ピストンロッド、5・・・
ロッドガイド、6・・・伸長側減衰力発生機構、13・
・・縮小側減衰力発生機構、16・・・アウタシェル、
17・・・ダイヤフラム、20・・・ガス室、23・・
・キャラ7’、24゜31.41・・・シール部材、3
2.42・・・V溝、33.43・・・弁部材、51・
・・弾性弁部材、51A・・・弁部、A、B・・・油N
、”・・・補給室。 特許出願人 ト キ コ 株式会社 代理人弁理士広瀬和彦′12.。 ;膏゛ 第2図 IA 第3図 第4図 第5図
Figures 1 to 3 show the prior art. Figure 1 is a vertical cross-sectional view of a shock absorber for adjusting vehicle height, Figure 2 is an enlarged view of the main parts of Figure 1, and Figure 3 is an explanatory diagram of the operation. , FIGS. 4 and 5 show a first embodiment of the present invention, FIG. 4 is a sectional view similar to FIG. 3, FIG. 5 is a plan view of the sealing member, and FIGS. 6 and 7. are the second. of the present invention, respectively. FIG. 4 is a sectional view similar to FIG. 3 showing a third embodiment; 1...Cylinder, IA...Outer cylinder, IB...Cylinder,
3... Piston, 4... Piston rod, 5...
Rod guide, 6... Extension side damping force generation mechanism, 13.
...reduction side damping force generation mechanism, 16...outer shell,
17...Diaphragm, 20...Gas chamber, 23...
・Character 7', 24°31.41...Seal member, 3
2.42...V groove, 33.43...Valve member, 51.
...Elastic valve member, 51A...Valve part, A, B...Oil N
"... Supply room. Patent applicant Tokiko Co., Ltd. Representative Patent Attorney Kazuhiko Hirose '12.; Figure 2 IA Figure 3 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】 (1ン 外筒と円筒とからなる複筒シリンダと、該内筒
内に往復動可能に設けたピストンと、一端が該ピストン
に取付けられ、他端が前記シリンダ外に突出して設けら
れたピストンロワトド、該ピストンロッドの変位に対し
て抵抗力を発生させる減衰力発生機構と、前記ピストン
ロッドの他端部に取付けたアウタシェルと、該アウタシ
ェルと前記外筒との間に設けたダイヤ72人と、該アク
タシェルおよびダイヤフラムの内部に形成され、高圧ガ
スが封入されるガス室と、該ガス室と前記シリンダとの
間を気液密に保持するために該シリンダのピストンロッ
ド導出側端部に設けたシール部材と、該シール部材を位
置決めするために前記シリンダに嵌合して設けたキャッ
プとを備えた車高調整用緩衝器において、前記シール部
材とキャップとの間には前記ガス室からシリンダ内にガ
スが流入するのを防止する逆止弁を設けたことを特徴と
する車高調整用緩衝器。 (2)前記逆止弁は前記シール部材の外周部に一体的に
設けられ、前記ガス室内が高圧となったときに撓んで前
記キャップの内周壁に当接する弁部材で形成したことを
特徴とする特許請求の範囲(1)項記載の車高調整用緩
衝器。 (3)前記逆止弁は前記シール部材と前記キャップ内壁
との間に該シール部材の軸方向に一体的に設けられ、前
記ガス室内が高圧となったときに撓んで前記キャップの
内周壁に当接する弁部材で形成したことを特徴とする特
許請求の範囲(0項記載の車高調整用緩衝器。 (4)前記逆止弁は前記キャップの内周壁に外周縁部が
固着して設けられ、前記ガス室内が高圧となったときに
内周縁部が撓んで前記シール部材の外周面に当接する弾
性弁部材で形成したことを特徴とする特許請求の範囲(
1)項記載の車高p!整用緩衝器。
[Claims] (1) A double cylinder consisting of an outer cylinder and a cylinder, a piston provided within the inner cylinder so as to be able to reciprocate, one end of which is attached to the piston, and the other end of which is attached to the outside of the cylinder. A protruding piston lower, a damping force generation mechanism that generates a resistance force against displacement of the piston rod, an outer shell attached to the other end of the piston rod, and a space between the outer shell and the outer cylinder. A gas chamber formed inside the actuator shell and the diaphragm and filled with high-pressure gas, and a piston of the cylinder to maintain air-liquid tightness between the gas chamber and the cylinder. In a vehicle height adjustment shock absorber comprising a seal member provided at the end of the rod leading out side, and a cap fitted to the cylinder for positioning the seal member, there is a gap between the seal member and the cap. A shock absorber for adjusting vehicle height, characterized in that the check valve is provided with a check valve that prevents gas from flowing into the cylinder from the gas chamber. (2) The check valve is provided on the outer periphery of the sealing member. The vehicle height adjusting device according to claim (1), characterized in that it is formed of a valve member that is integrally provided and that bends and comes into contact with the inner circumferential wall of the cap when the gas chamber becomes high pressure. Shock absorber. (3) The check valve is integrally provided in the axial direction of the seal member between the seal member and the inner wall of the cap, and is bent when the pressure inside the gas chamber becomes high. (4) The check valve has an outer peripheral edge fixed to the inner peripheral wall of the cap. Claims characterized in that the sealing member is formed of an elastic valve member, the inner circumferential edge of which bends and comes into contact with the outer circumferential surface of the sealing member when the pressure inside the gas chamber becomes high.
Vehicle height p stated in section 1)! Maintenance buffer.
JP11037683A 1983-06-20 1983-06-20 Car height adjusting damper Pending JPS601008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11037683A JPS601008A (en) 1983-06-20 1983-06-20 Car height adjusting damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11037683A JPS601008A (en) 1983-06-20 1983-06-20 Car height adjusting damper

Publications (1)

Publication Number Publication Date
JPS601008A true JPS601008A (en) 1985-01-07

Family

ID=14534232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11037683A Pending JPS601008A (en) 1983-06-20 1983-06-20 Car height adjusting damper

Country Status (1)

Country Link
JP (1) JPS601008A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4789866A (en) * 1984-11-08 1988-12-06 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4792807A (en) * 1985-03-27 1988-12-20 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4804967A (en) * 1985-10-29 1989-02-14 Toyota Jidosha Kabushiki Kaisha Vehicle antenna system
US4804966A (en) * 1984-10-29 1989-02-14 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4806942A (en) * 1985-06-10 1989-02-21 Toyota Jidosha Kabushiki Kaisha Automobile TV antenna system
US4811024A (en) * 1984-10-17 1989-03-07 Toyota Jidosha Kabushiki Kaisha Automobile antenna
US4823142A (en) * 1985-06-21 1989-04-18 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
KR100466744B1 (en) * 2002-01-07 2005-01-24 진랑규 Hydraulic Cylinder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811024A (en) * 1984-10-17 1989-03-07 Toyota Jidosha Kabushiki Kaisha Automobile antenna
US4804966A (en) * 1984-10-29 1989-02-14 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4789866A (en) * 1984-11-08 1988-12-06 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4792807A (en) * 1985-03-27 1988-12-20 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4806942A (en) * 1985-06-10 1989-02-21 Toyota Jidosha Kabushiki Kaisha Automobile TV antenna system
US4823142A (en) * 1985-06-21 1989-04-18 Toyota Jidosha Kabushiki Kaisha Automobile antenna system
US4804967A (en) * 1985-10-29 1989-02-14 Toyota Jidosha Kabushiki Kaisha Vehicle antenna system
KR100466744B1 (en) * 2002-01-07 2005-01-24 진랑규 Hydraulic Cylinder

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