JPS6127637B2 - - Google Patents
Info
- Publication number
- JPS6127637B2 JPS6127637B2 JP20144582A JP20144582A JPS6127637B2 JP S6127637 B2 JPS6127637 B2 JP S6127637B2 JP 20144582 A JP20144582 A JP 20144582A JP 20144582 A JP20144582 A JP 20144582A JP S6127637 B2 JPS6127637 B2 JP S6127637B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- auxiliary
- piston
- piston rod
- auxiliary piston
- 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.)
- Expired
Links
- 230000035939 shock Effects 0.000 claims description 15
- 239000006096 absorbing agent Substances 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 1
Classifications
-
- 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
- F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
- Fluid-Damping Devices (AREA)
Description
【発明の詳細な説明】
この発明は車両の懸架用油圧緩衝装置に関し、
特に、緩衝装置が圧縮されたとき、その終端にお
いて緩衝用のピストンとシリンダとが衝突するの
を防止する、いわゆる底突き防止機構の改良に関
する。[Detailed Description of the Invention] This invention relates to a hydraulic shock absorber for vehicle suspension.
In particular, the present invention relates to an improvement in a so-called bottoming prevention mechanism that prevents the shock absorbing piston and cylinder from colliding at the end when the shock absorber is compressed.
車両の懸架用油圧緩衝装置にあつては、ピスト
ン杆の損傷を防ぐため、ピストンの行程終端にお
いてシリンダを支承するゴムやばねなどの弾性体
からなる底突き防止機構を装備している。 In order to prevent damage to the piston rod, hydraulic shock absorbers for vehicle suspension are equipped with a bottoming prevention mechanism made of an elastic body such as rubber or a spring that supports the cylinder at the end of the stroke of the piston.
しかし、これら弾性体は殆ど減衰力を有しない
ので反撥が強く、振動の収歛に比較的長時間を要
した。 However, since these elastic bodies have almost no damping force, they have strong repulsion, and it takes a relatively long time for the vibrations to settle down.
この発明は以上の不具合を改良することを目的
とするもので、前記した従来の緩衝用の弾性体に
変えて小型の油圧緩衝装置を設けた点に特徴があ
る。 The present invention aims to improve the above-mentioned problems, and is characterized in that a small hydraulic shock absorber is provided in place of the conventional shock absorbing elastic body described above.
以下、この発明を図示の実施例によつて説明す
る。第１図において、１１は自動二輪車の車体枠
であり、その後部に後車輪１５を有するリヤアー
ム１３が枢軸１１ｂにより揺動自在に枢支されて
いる。リヤアーム１３は山形の補助枠１３ａによ
つて補強されており、補助枠１３ａと車体枠１１
との間に懸架用油圧緩衝装置１７を介装してい
る。 The present invention will be explained below with reference to illustrated embodiments. In FIG. 1, 11 is a body frame of a motorcycle, and a rear arm 13 having a rear wheel 15 at the rear thereof is swingably supported by a pivot 11b. The rear arm 13 is reinforced by a chevron-shaped auxiliary frame 13a, and the auxiliary frame 13a and the vehicle body frame 11
A suspension hydraulic shock absorber 17 is interposed between the two.
次に、懸架用油圧緩衝装置１７の詳細を第２図
によつて説明する。懸架用油圧緩衝装置１７は緩
衝ばね１９と減衰装置２１とからなる。 Next, details of the suspension hydraulic shock absorber 17 will be explained with reference to FIG. The suspension hydraulic shock absorber 17 includes a shock absorber spring 19 and a damping device 21 .
減衰装置２１は車体枠１１へ連結されたシリン
ダ２３と、このシリンダ２３に嵌挿され、ピスト
ン間２７を介してリヤアーム１３に連結されたピ
ストン２５と、前記緩衝ばね１９のばね座との間
に設けられた底突き防止機構Ａとからなる。２３
ａはシリンダ２３の端蓋である。 The damping device 21 is provided between a cylinder 23 connected to the vehicle body frame 11, a piston 25 fitted into the cylinder 23 and connected to the rear arm 13 via a piston gap 27, and a spring seat of the buffer spring 19. It consists of a bottoming prevention mechanism A provided. 23
a is an end cover of the cylinder 23.
緩衝ばね１９はシリンダ２３に設けられたばね
座２９と、ピストン杆２７に設けられたばね座３
１との間に架設されている。 The buffer spring 19 has a spring seat 29 provided on the cylinder 23 and a spring seat 3 provided on the piston rod 27.
It is constructed between 1 and 1.
第３図、第４図は前記した底突き防止機構Ａを
示す。４１は作動油の充填された補助シリンダで
あり、補助シリンダ本体４１ａと補助ピストン４
７とからなる。このシリンダ本体４１ａには補助
シリンダ蓋体４１ｂが摺動自在に嵌合されてお
り、後述する補助ピストン杆５３がシリンダ本体
４１ａ内へ進入したときの体積増加分を吸収する
ようにしてある。補助シリンダ本体４１ａの他端
は蓋４２によつて閉じられており、蓋４２から内
方へ後述する支筒４３を一体的に有している。 3 and 4 show the bottoming prevention mechanism A described above. 41 is an auxiliary cylinder filled with hydraulic oil, which includes an auxiliary cylinder main body 41a and an auxiliary piston 4.
It consists of 7. An auxiliary cylinder lid 41b is slidably fitted into the cylinder body 41a, and is designed to absorb the increase in volume when an auxiliary piston rod 53, which will be described later, enters the cylinder body 41a. The other end of the auxiliary cylinder main body 41a is closed by a lid 42, and integrally has a supporting cylinder 43, which will be described later, extending inward from the lid 42.
前記補助ピストン４７は補助シリンダ４１内に
摺動自在に嵌合すると共に、その補助ピストン杆
５３は前記蓋体４１ｂを貫通して外部へ突出して
いる。補助ピストン杆５３は筒状をなし、前記支
筒４３に嵌合していて、分解・組立等に際してピ
ストン杆２７が抜き取られた状態でも補助シリン
ダ本体４１ａ内の作動油が流出しないように配慮
してある。図中、補助ピストン杆５３の右端と蓋
４２との間には、補助ピストン４７が行程端にお
いて蓋４２へ衝突しないための停止装置が形成さ
れている。すなわち、蓋４２の内面に形成された
中心孔４２ａが、また、補助ピストン杆５３の右
端には先細のテーパ部５３が形成され、テーパ部
５３の先端が対して形成された中心孔４２ａ内に
入ると、そこに存在した作動油が中心孔４２ａと
テーパ部５３のとの隙間から逃げるが、補助ピス
トン杆５３の進行と共に隙間が小さくなり、補助
ピストン４７と蓋４２とが衝突する直前に作動油
が漏出できなくなつて、補助ピストン杆５３の進
行が停止するようになつている。補助ピストン４
７には、オリフイス４９，４９及びこれを開閉す
る皿状の板ばねからなる弁体５１が設けられ、補
助ピストン４７が右動する行程と左動する行程に
おける減衰力の調整を行うように構成されてい
る。５５は補助ピストン杆５３の外端に設けられ
た衝突板、５７は補助ピストン４７の戻しばねと
して作用するゴム状の弾性体である。 The auxiliary piston 47 is slidably fitted into the auxiliary cylinder 41, and its auxiliary piston rod 53 penetrates the lid 41b and projects to the outside. The auxiliary piston rod 53 has a cylindrical shape and is fitted into the support tube 43, and is designed to prevent the hydraulic oil in the auxiliary cylinder body 41a from flowing out even when the piston rod 27 is removed during disassembly and assembly. There is. In the figure, a stop device is formed between the right end of the auxiliary piston rod 53 and the lid 42 to prevent the auxiliary piston 47 from colliding with the lid 42 at the end of its stroke. That is, a center hole 42a formed on the inner surface of the lid 42 is formed, and a tapered part 53 is formed at the right end of the auxiliary piston rod 53, and the tip of the tapered part 53 is inserted into the center hole 42a formed on the opposite side. When it enters, the hydraulic oil that was present there escapes from the gap between the center hole 42a and the tapered part 53, but as the auxiliary piston rod 53 advances, the gap becomes smaller, and the operation occurs immediately before the auxiliary piston 47 and the lid 42 collide. Since oil can no longer leak out, the movement of the auxiliary piston rod 53 is stopped. Auxiliary piston 4
7 is provided with orifices 49, 49 and a valve body 51 consisting of a disk-shaped plate spring that opens and closes the orifices, and is configured to adjust the damping force in the stroke in which the auxiliary piston 47 moves to the right and the stroke in which it moves to the left. has been done. 55 is a collision plate provided at the outer end of the auxiliary piston rod 53, and 57 is a rubber-like elastic body that acts as a return spring for the auxiliary piston 47.
次に実施例の作動を説明すると、緩衝装置１７
が強く圧縮されてピストン杆２７がその終端に至
ると、シリンダ２３の端蓋２３ａが衝突板５５に
衝突（第３図）する。このため、衝突板５５は弾
性体５７を圧縮しつゝＢ方向へ押し込まれ、補助
ピストン４７も同方向へ移動する。補助シリンダ
４１の一方の室ａ内の作動油は補助ピストン４７
のオリフイス４９，４９の弁体５１の隙間を通じ
て他方の室ｂへ流動する際、小さな通路面積の隙
間によつて、大きな減衰力を発生させる。 Next, to explain the operation of the embodiment, the shock absorber 17
When the cylinder 23 is strongly compressed and the piston rod 27 reaches its terminal end, the end cap 23a of the cylinder 23 collides with the collision plate 55 (FIG. 3). Therefore, the collision plate 55 is pushed in the direction B while compressing the elastic body 57, and the auxiliary piston 47 also moves in the same direction. The hydraulic oil in one chamber a of the auxiliary cylinder 41 is transferred to the auxiliary piston 47.
When flowing into the other chamber b through the gap between the valve bodies 51 of the orifices 49 and 49, a large damping force is generated due to the gap having a small passage area.
ピストン杆２７が伸長行程に転じると、補助ピ
ストン４７も同方向へ移動する。補助シリンダ４
１の他方の室ｂ内の作動油は補助ピストン４７の
オリフイス４９，４９の弁体５１の隙間を通じて
他方の室ｂへ流動するが、このとき弁体５１が大
きく開かれ、補助ピストン４７は弾性体５７の弾
力により、急速に原位置へ復帰する。 When the piston rod 27 begins its extension stroke, the auxiliary piston 47 also moves in the same direction. Auxiliary cylinder 4
1 flows into the other chamber b through the gap between the orifice 49 of the auxiliary piston 47 and the valve body 51 of the auxiliary piston 47. At this time, the valve body 51 is wide open and the auxiliary piston 47 is elastic. Due to the elasticity of the body 57, it quickly returns to its original position.
以上のように、この発明の懸架用油圧緩衝装置
は車体側部材と車輪側部材との一方に連結された
シリンダと、このシリンダに嵌挿されピストン杆
を介して他方に連結されたピストンとを有し、そ
れらの間に緩衝ばねを配すると共に、前記ピスト
ンに連なる部材とシリンダとの間にピストンの底
突き防止機構を備える車両において、前記底突き
防止機構は作動油の充填された補助シリンダと、
これに嵌挿された補助ピストンと、この補助ピス
トンから伸びて前記補助シリンダ外へ突出された
補助ピストン杆と、この補助ピストン杆を突出方
向へ付勢する弾性材とで構成されているから、ピ
ストン杆が終端に至つたときに余剰エネルギーは
補助シリンダ、補助ピストンなどからなる油圧式
の底突き防止機構Ａによつて消費せられる。よつ
て、従来に比しピストン杆の戻りは緩慢になり、
車輪の路面吸着性が向上する効果がある。 As described above, the suspension hydraulic shock absorber of the present invention includes a cylinder connected to one of the vehicle body side member and the wheel side member, and a piston fitted into this cylinder and connected to the other through the piston rod. and a buffer spring is disposed between them, and a piston bottoming prevention mechanism is provided between a member connected to the piston and the cylinder, wherein the bottoming prevention mechanism includes an auxiliary cylinder filled with hydraulic oil. and,
It is composed of an auxiliary piston fitted into the auxiliary piston, an auxiliary piston rod extending from the auxiliary piston and protruding outside the auxiliary cylinder, and an elastic member that biases the auxiliary piston rod in the projecting direction. When the piston rod reaches its end, the surplus energy is consumed by a hydraulic bottoming prevention mechanism A consisting of an auxiliary cylinder, an auxiliary piston, and the like. Therefore, the return of the piston rod is slower than before,
This has the effect of improving the adhesion of the wheels to the road surface.
図面はこの発明の一実施例を示すものであり、
第１図は自動二輪車の後輪懸架装置の側面図、第
２図はその要部の断面図、第３，４図は底突き防
止機構の断面図である。
４１……補助シリンダ、４７……補助ピスト
ン、５３……補助ピストン杆、Ａ……ピストンの
底突き防止機構。
The drawings show one embodiment of the invention,
FIG. 1 is a side view of a rear wheel suspension system of a motorcycle, FIG. 2 is a cross-sectional view of its main parts, and FIGS. 3 and 4 are cross-sectional views of a bottoming prevention mechanism. 41... Auxiliary cylinder, 47... Auxiliary piston, 53... Auxiliary piston rod, A... Piston bottoming prevention mechanism.
Claims (1)
たシリンダと、このシリンダに嵌挿されピストン
杆を介して他方に連結されたピストンとを有し、
それらの間に緩衝ばねを配すると共に、前記ピス
トンに連なる部材とシリンダとの間にピストンの
底突き防止機構を備える車両において、前記底突
き防止機構は作動油の充填された補助シリンダ
と、これに嵌挿された補助ピストンと、この補助
ピストンから伸びて前記補助シリンダ外へ突出さ
れた補助ピストン杆と、この補助ピストン杆を突
出方向へ付勢する弾性材とからなる懸架用油圧緩
衝装置。 ２ 前記底突き防止機構はシリンダとばね座との
間に配置されている特許請求の範囲第１項記載の
懸架用油圧緩衝装置。 ３ 前記底突き防止機構はシリンダ内のピストン
頂面側端部に設けられている特許請求の範囲第１
項記載の懸架用油圧緩衝装置。[Claims] 1. A cylinder connected to one of a vehicle body side member and a wheel side member, and a piston fitted into this cylinder and connected to the other via a piston rod,
In the vehicle, a buffer spring is disposed between them, and a piston bottoming prevention mechanism is provided between a member connected to the piston and the cylinder, and the bottoming prevention mechanism includes an auxiliary cylinder filled with hydraulic oil; A suspension hydraulic shock absorber comprising an auxiliary piston fitted into the auxiliary piston, an auxiliary piston rod extending from the auxiliary piston and projecting out of the auxiliary cylinder, and an elastic member urging the auxiliary piston rod in the projecting direction. 2. The suspension hydraulic shock absorber according to claim 1, wherein the bottoming prevention mechanism is disposed between the cylinder and the spring seat. 3. The bottoming prevention mechanism is provided at the top end of the piston in the cylinder.
Hydraulic shock absorber for suspension as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20144582A JPS5993540A (en) | 1982-11-16 | 1982-11-16 | Hydraulic damper device for vehicle suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20144582A JPS5993540A (en) | 1982-11-16 | 1982-11-16 | Hydraulic damper device for vehicle suspension |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5993540A JPS5993540A (en) | 1984-05-30 |
| JPS6127637B2 true JPS6127637B2 (en) | 1986-06-26 |
Family
ID=16441202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20144582A Granted JPS5993540A (en) | 1982-11-16 | 1982-11-16 | Hydraulic damper device for vehicle suspension |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5993540A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3934896C2 (en) * | 1989-10-19 | 1996-02-01 | Krauss Maffei Ag | End stop damper for damping an impact energy introduced into a vehicle wheel |
-
1982
- 1982-11-16 JP JP20144582A patent/JPS5993540A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5993540A (en) | 1984-05-30 |
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