JP2005280514A

JP2005280514A - Suspension device

Info

Publication number: JP2005280514A
Application number: JP2004098193A
Authority: JP
Inventors: Hiroaki Kawasaki; 裕章川崎; Yukio Nakao; 幸夫中尾
Original assignee: Sumitomo Rubber Industries Ltd
Current assignee: Sumitomo Rubber Industries Ltd
Priority date: 2004-03-30
Filing date: 2004-03-30
Publication date: 2005-10-13

Abstract

PROBLEM TO BE SOLVED: To provide a suspension device that allows easy mounting work even when a projection member exists on the car body side and easily adjusts the vehicle height. SOLUTION: The suspension device has a bottomed cylindrical barrel 6 of upper part opening shape. A piston 7 is mounted in a space of the bottomed cylindrical barrel 6. A fluid storage empty chamber section 10 is formed between a pressure receiving panel section 9 of the piston 7 and the end wall 5 of the bottomed cylindrical barrel 6. The piston 7 has a bottomed cylindrical shape with an upper part opening and has a cylindrical part 8 and the pressure receiving panel section 9. The upper edge 11 of the cylindrical part 8 of the piston 7 is extended projectingly upward than the upper edge of the outer wall 4 of the bottomed cylindrical barrel 6. COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動車の車輪懸架装置に関する。 The present invention relates to an automobile wheel suspension system.

従来、本発明者等は、車高の調整が容易で、乗心地を向上させるために、コイルスプリングとエアスプリングを直列的に配置した懸架装置について種々の提案を行ってきた（例えば、下記の特許文献１、特許文献２参照）。さらに、本発明者等は、図９に示すように、コイルスプリング31とエアスプリング32及び機械的な高さ調整自在なアダプタ33を、直列的に配設して、車体34と車軸（連結アーム）35側との間に介装した懸架装置についても提案している（下記の特許文献３参照）。
特開２００３−１４６０４２号公報特開２００１−１２１９３６号公報特開２００３− ８９３０９号公報 Conventionally, the present inventors have made various proposals on a suspension device in which a coil spring and an air spring are arranged in series in order to easily adjust the vehicle height and improve riding comfort (for example, (See Patent Document 1 and Patent Document 2). Further, as shown in FIG. 9, the present inventors have arranged a coil spring 31, an air spring 32, and an adapter 33 with adjustable mechanical height in series so that a vehicle body 34 and an axle (a connecting arm) ) It has also proposed a suspension device interposed between the 35 side (see Patent Document 3 below).
JP 2003-146042 A JP 2001-121936 A JP 2003-89309 A

従来の懸架装置は、図９に例示するように、車体34側の取付部34Ａが平坦面状であれば、取付作業において、問題がなかった。即ち、例えばホンダ製のステップワゴン等では、上記取付部34Ａは平坦面状（フラット）であったので、アダプタ33の上端をボルト36等によって取着することはできた。 As illustrated in FIG. 9, the conventional suspension device has no problem in the mounting operation if the mounting portion 34 A on the vehicle body 34 side is a flat surface. That is, for example, in the step wagon made by Honda, the mounting portion 34A has a flat surface shape (flat), so that the upper end of the adapter 33 can be attached by the bolt 36 or the like.

しかしながら、車種によっては、図８に示すように（元来の）コイルスプリング37の中に張り出した（突入した）突起部材38が、車体34側に形成されている場合がある。（なお、この突起部材38はバンプラバー39を下端に付設する役目をなしている。）
この図８に示した突起部材38が、懸架装置の取付部34Ａに存在する場合、上述した図９のような従来の懸架装置───コイルスプリング31とエアスプリング32とアダプタ33を直列的に配置した懸架装置───を、装着できない。 However, depending on the vehicle type, as shown in FIG. 8, a protruding member 38 that protrudes (enters) into the (original) coil spring 37 may be formed on the vehicle body 34 side. (The protruding member 38 serves to attach the bump rubber 39 to the lower end.)
When the projecting member 38 shown in FIG. 8 exists in the attachment portion 34A of the suspension device, the conventional suspension device as shown in FIG. 9 described above--coil spring 31, air spring 32, and adapter 33 are connected in series. I cannot install the suspension system that I placed.

あえて、図９に示した懸架装置、あるいは前記特許文献１，２の懸架装置を、装着せんとすれば、図８に例示の突起部材38を根元（上端）から切断して、さらに孔部を溶接等にて塞いでから取付けねばならなくなり、その切断作業及び取付（溶接）作業が極めて面倒で手間が掛かり、さらに、車体34の剛性が低下する等の弊害も生ずる。 If the suspension device shown in FIG. 9 or the suspension device of Patent Documents 1 and 2 is installed, the protrusion member 38 illustrated in FIG. 8 is cut from the root (upper end), and the hole is further formed. Since it must be attached after it is closed by welding or the like, the cutting operation and attachment (welding) operation are extremely troublesome and time-consuming, and there is also a problem that the rigidity of the vehicle body 34 is lowered.

そこで、本発明は、車体側にこのような突起部材が存在した車両に対して、車体側を切断したり、溶接したりすることなく、エアシリンダ（エアスプリング）とコイルスプリングとを直列的に備えていても、容易に装着可能な懸架装置を提供することを、目的とする。さらに、車高を容易に変化させることを可能として、高速走行安定性を確保し、他方、悪路（地道）走行時には十分な車高を確保する等が可能な懸架装置を提供することを他の目的としている。さらに、粉塵等の異物が侵入しにくく、耐久性に優れ、しかも、コンパクトで取付が容易な懸架装置を提供することを、別の目的とする。 Therefore, the present invention provides an air cylinder (air spring) and a coil spring connected in series to a vehicle having such a protruding member on the vehicle body side without cutting or welding the vehicle body side. An object of the present invention is to provide a suspension device that can be easily mounted even if it is provided. Furthermore, it is possible to easily change the vehicle height, to ensure a high-speed running stability, and to provide a suspension device that can secure a sufficient vehicle height when traveling on rough roads (land roads). The purpose is. It is another object of the present invention to provide a suspension device that is difficult for foreign matter such as dust to enter, has excellent durability, and is compact and easy to mount.

そこで、本発明に係る懸架装置は、外周壁と底壁とを有する上方開口状の有底筒形バレルに、円筒部と受圧盤部を有する上方開口状有底筒形ピストンを、装着して、上記有底筒形バレル内に流体収納空室部を形成し、上記ピストンの受圧盤部の上面側にピストンと直列的にコイルスプリングを配設し、さらに、上記ピストンの上記円筒部の上端縁を上記有底筒形バレルの上記外周壁よりも上方突出状として上記外周壁の上端内周面を常時ピストンの上記円筒部に対面するように構成したものである。 Therefore, the suspension device according to the present invention is provided with an upper-opened bottomed cylindrical piston having a cylindrical portion and a pressure receiving plate portion mounted on an upper-opened bottomed cylindrical barrel having an outer peripheral wall and a bottom wall. Forming a fluid storage cavity in the bottomed cylindrical barrel, arranging a coil spring in series with the piston on the upper surface side of the pressure receiving plate of the piston, and further, an upper end of the cylindrical portion of the piston An edge is projected upward from the outer peripheral wall of the bottomed cylindrical barrel so that the upper end inner peripheral surface of the outer peripheral wall always faces the cylindrical portion of the piston.

また、外周壁と底壁とを有する上方開口状の有底筒形バレルに、円筒部と受圧盤部とから成る上方開口状有底筒形ピストンを、装着して、上記有底筒形バレル内に流体収納空室部を形成し、さらに、上記ピストンの上記円筒部の上端縁を上記有底筒形バレルの上記外周壁よりも上方へ延伸すると共に、該ピストンには、上記有底筒形バレルの上記外周壁の上面全体及び外周面の上半部位を包囲する外嵌壁部が、一体状に連設され、かつ、該外嵌壁部はコイルスプリングを受持する外鍔部を有し、該外嵌壁部の外鍔部にてコイルスプリングを受持することによって上記ピストンと直列的にコイルスプリングを配設したものである。 Further, the above bottomed cylindrical barrel is provided with an upper open bottomed cylindrical piston having a cylindrical portion and a pressure receiving plate portion mounted on an upper open bottomed cylindrical barrel having an outer peripheral wall and a bottom wall. A fluid storage chamber is formed therein, and the upper end edge of the cylindrical portion of the piston is extended upward from the outer peripheral wall of the bottomed cylindrical barrel. An outer fitting wall portion surrounding the entire upper surface of the outer peripheral wall of the barrel and the upper half of the outer peripheral surface is integrally connected, and the outer fitting wall portion has an outer flange portion for receiving a coil spring. The coil spring is disposed in series with the piston by receiving the coil spring at the outer flange portion of the outer fitting wall portion.

また、外周壁と底壁とを有する上方開口状の有底筒形バレルに、円筒部と受圧盤部とから成る上方開口状有底筒形ピストンを、装着して、上記有底筒形バレル内に流体収納空室部を形成し、さらに、上記ピストンの上記円筒部の上端縁を上記有底筒形バレルの上記外周壁よりも上方へ延伸すると共に、該ピストンには、上記有底筒形バレルの上記外周壁の上面全体及び外周面の上半部位を包囲する外嵌壁部が、連設され、さらに、上記ピストンの受圧盤部の上面側にピストンと直列的にコイルスプリングを配設したものである。 Further, the above bottomed cylindrical barrel is provided with an upper open bottomed cylindrical piston having a cylindrical portion and a pressure receiving plate portion mounted on an upper open bottomed cylindrical barrel having an outer peripheral wall and a bottom wall. A fluid storage chamber is formed therein, and the upper end edge of the cylindrical portion of the piston is extended upward from the outer peripheral wall of the bottomed cylindrical barrel. An outer fitting wall portion surrounding the entire upper surface of the outer peripheral wall and the upper half portion of the outer peripheral surface of the barrel is provided continuously, and a coil spring is arranged in series with the piston on the upper surface side of the pressure receiving plate portion of the piston. It is set.

そして、有底筒形バレルの外周壁の上端内周面に、異物侵入防止用のダストシールを付設するのが望ましい。あるいは、有底筒形バレルの外周壁の外周面と、上記外嵌壁部の内周面との間に、異物混入防止用のダストシールを配設するのが望ましい。
また、上記流体収納空室部内にエアを密封状に収納してエアシリンダを構成すると共に該エアを出し入れして車高を調整するように構成する。または、上記流体収納空室部内にオイルを出し入れして車高を調整するように構成する。
そして、直列的に配設された上記ピストンとコイルスプリングとは、独立して、緩衝装置が並設されている。 And it is desirable to attach the dust seal | sticker for a foreign material penetration | invasion prevention to the upper end internal peripheral surface of the outer peripheral wall of a bottomed cylindrical barrel. Alternatively, it is desirable to dispose a dust seal for preventing foreign matter mixing between the outer peripheral surface of the outer peripheral wall of the bottomed cylindrical barrel and the inner peripheral surface of the outer fitting wall portion.
In addition, the air is sealed in the fluid housing space to form an air cylinder, and the air is taken in and out to adjust the vehicle height. Alternatively, the vehicle height is adjusted by putting oil into and out of the fluid housing empty space.
And the said piston and coil spring arrange | positioned in series independently have the shock absorber arranged in parallel.

本発明は、次のような著大な効果を奏する。
車体側に突起部材が存在している車種であっても、車体側を切断や溶接することなく、流体圧シリンダ（エアシリンダ）を具備した懸架装置を、装着することが可能となった。そして、突起部材が存在している車種に（上述のように）そのまま懸架装置を装着できるにもかかわらず、その構造が簡易で、製作が比較的に安価かつ容易であって、流体圧シリンダから流体が外部漏洩する危険性を低減して、密封耐久性にも優れる。さらに、高さ方向の寸法をコンパクト化しやすく、高さ寸法が十分でない自動車（車種）へも装着が可能となる。
また、高速走行時には車高をやや低目に設定して安定して走行することができ、悪路等を走行するときには車高を高目に設定する等のように、車高変更を容易に変更可能となる。 The present invention has the following remarkable effects.
Even in a vehicle type in which a protruding member exists on the vehicle body side, it is possible to mount a suspension device including a fluid pressure cylinder (air cylinder) without cutting or welding the vehicle body side. Although the suspension device can be mounted as it is on the vehicle type in which the protruding member exists (as described above), the structure is simple, the manufacturing is relatively inexpensive and easy, Reduces the risk of fluid leaking to the outside and excels in sealing durability. Furthermore, it is easy to make the height dimension compact, and it can be mounted on a vehicle (vehicle type) whose height is not sufficient.
In addition, the vehicle height can be set to a slightly low level when driving at high speeds, and the vehicle height can be set to a high level when driving on rough roads. It can be changed.

以下、図示の実施の形態に基づき本発明を詳説する。
図１に於て、本発明に係る自動車の車輪懸架装置の実施の一形態を示し、この懸架装置１は、コイルスプリング３と流体圧シリンダ２とを直列的に配設したものであり、自動車の車体34と車軸35の間に装着されている。 Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
FIG. 1 shows an embodiment of an automobile wheel suspension system according to the present invention. This suspension system 1 includes a coil spring 3 and a fluid pressure cylinder 2 arranged in series. The vehicle body 34 and the axle 35 are mounted.

具体的には、流体圧シリンダ２は、外周壁４と底壁５とを有する有底筒形バレル６と、このバレル６内に上下摺動可能に装着されるピストン７と、を備えている。
ピストン７は、円筒部８と、その下端に連設される受圧盤部９とを有する上方開口状有底筒形である。内部のピストン７の円形の受圧盤部９と、バレル６の円形の底壁５との間に於て、（バレル６内に）流体収納空室部10が形成される。
上方開口状有底筒形ピストン７の受圧盤部９の上面側にコイルスプリング３を、ピストン７と直列的に配設する。 Specifically, the fluid pressure cylinder 2 includes a bottomed cylindrical barrel 6 having an outer peripheral wall 4 and a bottom wall 5, and a piston 7 that is slidably mounted in the barrel 6. .
The piston 7 has a bottomed cylindrical shape having an upper opening having a cylindrical portion 8 and a pressure receiving plate portion 9 provided at the lower end thereof. Between the circular pressure receiving plate portion 9 of the internal piston 7 and the circular bottom wall 5 of the barrel 6, a fluid storage chamber portion 10 is formed (in the barrel 6).
A coil spring 3 is arranged in series with the piston 7 on the upper surface side of the pressure receiving plate portion 9 of the bottomed cylindrical piston 7 having an upper opening.

ピストン７は有底筒形バレル６内を昇降作動するが、ピストン７の円筒部８の上端縁11は、常時、有底筒形バレル６の外周壁４よりも上方突出状───上方延伸状───として、外周壁４の上端内周面４ａをピストン７の円筒部８に対面するように構成し、外周壁４の上端内周面４ａが外部に露出せず、粉塵（異物）が付着しないように、上方へ延伸状の円筒部８の上半部位によって、被覆（遮蔽）されている。
コイルスプリング３の下半部位は、有底筒形ピストン７の上方開口状の空間７ａへ挿入状として、コイルスプリング３とピストン７とは、組立てられる。コイルスプリング３の上端は車体34のアッパーマウント20にて受けられ（当接し）、下端はピストン７の受圧盤部９の上面９ａに当接している。コイルスプリング３の軸心は、流体圧シリンダ２の軸心Ｌに一致する。 The piston 7 moves up and down in the bottomed cylindrical barrel 6, but the upper end edge 11 of the cylindrical portion 8 of the piston 7 always protrudes upward from the outer peripheral wall 4 of the bottomed cylindrical barrel 6. The upper end inner peripheral surface 4a of the outer peripheral wall 4 faces the cylindrical portion 8 of the piston 7 so that the upper end inner peripheral surface 4a of the outer peripheral wall 4 is not exposed to the outside and dust (foreign matter) is formed. Is covered (shielded) by the upper half portion of the cylindrical portion 8 extending upward.
The coil spring 3 and the piston 7 are assembled so that the lower half of the coil spring 3 is inserted into the space 7a in the upper opening of the bottomed cylindrical piston 7. The upper end of the coil spring 3 is received (contacted) by the upper mount 20 of the vehicle body 34, and the lower end is in contact with the upper surface 9 a of the pressure receiving plate portion 9 of the piston 7. The axial center of the coil spring 3 coincides with the axial center L of the fluid pressure cylinder 2.

このように、ピストン７の受圧盤部９の上面９ａに直列的にコイルスプリング３を配設して、流体圧シリンダ２とコイルスプリング３を直列的に配設するが、本発明では、「直列的」とは、車体34側と車軸35の間の力の伝達が、一方のみを介して伝達されることが無く、必ず両者を介して伝達される配置を言うものと、定義する。 As described above, the coil spring 3 is disposed in series on the upper surface 9a of the pressure receiving plate portion 9 of the piston 7, and the fluid pressure cylinder 2 and the coil spring 3 are disposed in series. “Target” is defined as an arrangement in which the transmission of force between the vehicle body 34 side and the axle 35 is not transmitted via only one, but is always transmitted via both.

図１に於て、有底筒形バレル６の底壁５に継手12を介して流体配管13が接続される。上記流体収納空室部10内には好ましくはエアを密封することで、流体圧シリンダ２はエアシリンダ（エアスプリング）２Ａを構成することとなる。なお、流体収納空室部10内にエアを密封状に収納してエアシリンダ２Ａを構成してエアを出し入れ自在に、（図外の）切換弁類とエアタンク・コンプレッサ等と上記流体配管13を介して接続し、エアの出し入れによって、車高を調整するようにするのが望ましい。
また、流体収納空室部10内にオイルを出し入れ自在に、（図外の）切換弁類とポンプ等に上記流体配管13を介して接続し、オイルの出し入れによって車高を調整するように構成するも自由である。 In FIG. 1, a fluid pipe 13 is connected to a bottom wall 5 of a bottomed cylindrical barrel 6 via a joint 12. The fluid pressure cylinder 2 constitutes an air cylinder (air spring) 2 A by preferably sealing air in the fluid housing empty space 10. In addition, air is sealed in the fluid storage chamber 10 to form an air cylinder 2A so that air can be taken in and out (not shown), switching valves, an air tank / compressor, etc., and the fluid pipe 13 above. It is desirable to adjust the vehicle height by connecting and disconnecting air.
In addition, oil can be taken into and out of the fluid storage vacant space 10 so that it can be connected to switching valves (not shown) and a pump via the fluid pipe 13 to adjust the vehicle height by taking in and out the oil. It is also free to do.

そして、図１に示すように、直列的に配設された上述の流体圧シリンダ２（のピストン７）とコイルスプリング３とは、独立して、緩衝装置（ショックアブソーバ）43が配設（並設）されている。車体34から垂下状の突起部材38が存在しているが、この突起部材38は、その軸心が上記軸心Ｌと一致して垂設され、コイルスプリング３及び空間７ａ内に突入し、収納されている。なお、ピストン７の円筒部８は十分な上下高さ寸法を有するので（かじり等を生じないで）安定姿勢で上下摺動する。なお、20はアッパーマウント、21はロアーマウントを示す。 As shown in FIG. 1, the above-described fluid pressure cylinder 2 (the piston 7) and the coil spring 3 arranged in series are independently provided with a shock absorber (shock absorber) 43 (in parallel). It is). A projecting member 38 that hangs down from the vehicle body 34 is present, and this projecting member 38 has its axis centered so as to coincide with the axis L, and projects into the coil spring 3 and the space 7a for storage. Has been. Since the cylindrical portion 8 of the piston 7 has a sufficient vertical height dimension (without causing galling or the like), it slides up and down in a stable posture. Reference numeral 20 denotes an upper mount, and 21 denotes a lower mount.

この図１と図８とを対比すれば明らかなように、本発明に係る懸架装置１では、流体圧シリンダ２内に、上方開口状空間７ａを有しており、突起部材38が突入可能な構成であるので、改造前の（既設の）コイルスプリング37等を取外して簡単に本発明に係る懸架装置を取付け可能である。つまり、既設の突起部材38を根元（上方基端）から切断する等の面倒な作業を行わずに、図１に示すように、改造を容易に可能である。勿論、突起部材38を切断した後に、カバー材を施蓋するための従来の溶接作業も省略できる。 As is clear from comparison between FIG. 1 and FIG. 8, the suspension device 1 according to the present invention has an upper open space 7 a in the fluid pressure cylinder 2 so that the protruding member 38 can enter. Since it is a structure, the suspension apparatus which concerns on this invention can be easily attached by removing the coil spring 37 etc. (existing) before modification. That is, the modification can be easily performed as shown in FIG. 1 without performing troublesome work such as cutting the existing protruding member 38 from the base (upper base end). Of course, the conventional welding operation for covering the cover material after cutting the protruding member 38 can be omitted.

次に、図１、及び、その要部拡大図である図２に於て、有底筒形バレル６の外周壁４の上端内周面４ａに、凹周溝14を形成して、その凹周溝14に、異物侵入防止用のダストシール15を嵌着している。上述のように、円筒部８の上端縁11は、外周壁４の上端面よりも上方突出状に延伸しており、上端内周面４ａは、常時、円筒部８の外周面に対面しているので、外周壁４の上端内周面４ａに配設の上記ダストシール15は、常に、ピストン７の円筒部８の外周面に、接触して、粉塵等の異物が、外周壁４の内周面と、円筒部８の外周面との間隙に、侵入することを、防止できる。ダストシール15としては、一般的なゴム又はプラスチック製のダストスクレーパを使用するのが良いが、種類の異なる２種以上のダストシールを、併用するも自由である（図示省略）。 Next, in FIG. 1 and FIG. 2 which is an enlarged view of the main part, a concave circumferential groove 14 is formed on the upper inner peripheral surface 4a of the outer peripheral wall 4 of the bottomed cylindrical barrel 6, and the concave A dust seal 15 for preventing entry of foreign matter is fitted in the circumferential groove 14. As described above, the upper end edge 11 of the cylindrical portion 8 extends upward from the upper end surface of the outer peripheral wall 4, and the upper end inner peripheral surface 4 a always faces the outer peripheral surface of the cylindrical portion 8. Therefore, the dust seal 15 provided on the inner peripheral surface 4 a at the upper end of the outer peripheral wall 4 is always in contact with the outer peripheral surface of the cylindrical portion 8 of the piston 7, so that foreign matters such as dust are in contact with the inner peripheral surface of the outer peripheral wall 4. Intrusion into the gap between the surface and the outer peripheral surface of the cylindrical portion 8 can be prevented. As the dust seal 15, it is preferable to use a general rubber or plastic dust scraper, but two or more different types of dust seals may be used together (not shown).

ピストン７の外周面の下端近傍には、図例では２本の凹周溝16, 17が形成され、下方の凹周溝16にはＵパッキンや角形パッキンやＯリング等のシール材18が嵌着され、上方の凹周溝17には摺動部材（摺り軸受）19が嵌着されている。この摺動部材19は、低摩擦かつ耐摩耗性の材質から成り、例えばフェノール樹脂製のウェアリング等を挙げることができ、外周壁４の内面に摺動自在に接触する。なお、凹周溝16を複数として、シール材18を増加するも好ましい（図示省略）。また、摺動部材19を省略して、代りに、ピストン７自体、又は、その外周面のみを、摩擦係数の小さい、摺り易い材質とすることも自由である（図示省略）。 In the example shown in the figure, two concave circumferential grooves 16 and 17 are formed near the lower end of the outer peripheral surface of the piston 7, and a sealing material 18 such as a U-packing, a square packing, or an O-ring is fitted in the lower concave circumferential groove 16. A sliding member (sliding bearing) 19 is fitted in the upper concave circumferential groove 17. The sliding member 19 is made of a material having low friction and wear resistance. For example, a wear ring made of phenol resin can be used, and the sliding member 19 slidably contacts the inner surface of the outer peripheral wall 4. It is also preferable to increase the sealing material 18 by providing a plurality of concave circumferential grooves 16 (not shown). Further, the sliding member 19 may be omitted, and instead, the piston 7 itself or only its outer peripheral surface may be made of a material with a small friction coefficient and easy to slide (not shown).

次に、図３と図４は、他の実施の形態を示す。
この図３と図４に於て、外周壁４と底壁５とを有する上方開口状の有底筒形バレル６を有する点、円筒部８と受圧盤部９とから成る上方開口有底筒形ピストン７を有する点、そして、上記バレル６にピストン７を装着して、バレル６内に、底壁５と受圧盤部９との（上下間に）流体収納空室部10を形成する点、及び、ピストン７の円筒部８の上端縁11をバレル６の外周壁４の上端縁よりも、上方へ延伸する点は、図１と図２で既述した実施の形態と同様である。 Next, FIGS. 3 and 4 show another embodiment.
In FIG. 3 and FIG. 4, there is an upper-opened bottomed cylinder comprising a cylindrical barrel 8 having an upper-opened bottomed barrel barrel 6 having an outer peripheral wall 4 and a bottom wall 5, and a cylindrical portion 8 and a pressure receiving plate portion 9. A point having the shape-shaped piston 7 and a point in which the piston 7 is mounted on the barrel 6 to form a fluid storage chamber 10 between the bottom wall 5 and the pressure receiving plate 9 in the barrel 6 (between the upper and lower sides). And the point which extends the upper end edge 11 of the cylindrical part 8 of the piston 7 upwards rather than the upper end edge of the outer peripheral wall 4 of the barrel 6 is the same as that of embodiment already described in FIG. 1 and FIG.

しかしながら、図３と図４で明らかなように、ピストン７の（円筒部８の）上端縁11には、バレル６の外周壁４の上面４ｂ全体及び外周面４ｃの上半部位を包囲する外嵌壁部22が、一体状に連設されている。この外嵌壁部22は、図例では、円筒部８の上端縁11に連設された（軸心Ｌと直交面状の）円環平板状の天井壁部23と、この天井壁部23の外周縁から下方へ垂設された円筒壁部24とを、有している。さらに、この外嵌壁部22は、コイルスプリング３の下端受持する外鍔部25を有し、この外鍔部25にてコイルスプリング３を受持することによって、ピストン７と直列的にコイルスプリング３を配設している。つまり、外鍔部25は、外嵌壁部22の円筒壁部24の下端縁から、外径方向へ突出状に形成され、アッパーマウント20との間に、コンパクトにコイルスプリング３を装着した構成である。コイルスプリング３の内周側は、この外嵌壁部22の円筒壁部24に近接配置されて、軸心Ｌに対する芯心を防止しつつ、伸縮時の案内（誘導）を受ける。このように、有底筒形バレル６の外周壁４は、その内周面は（上方延伸状の）円筒部８にて被覆され、かつ、上面４ｂは天井壁部23にて被覆（包囲）され、さらに、外周面４ｃの大部分は円筒壁部24にて被覆されているので、バレル６がピストン７と摺接していて、粉塵や異物の付着を嫌うところの外周壁４の内周面は、確実に保護され、シール材26の寿命が十分長く維持され、耐久性に優れている。 However, as is apparent from FIGS. 3 and 4, the upper end edge 11 (of the cylindrical portion 8) of the piston 7 has an outer surface surrounding the entire upper surface 4b of the outer peripheral wall 4 of the barrel 6 and the upper half of the outer peripheral surface 4c. The fitting wall portion 22 is continuously provided integrally. In the illustrated example, the outer fitting wall portion 22 includes an annular flat plate-like ceiling wall portion 23 (which has a shape perpendicular to the axis L) and is connected to the upper end edge 11 of the cylindrical portion 8, and the ceiling wall portion 23. And a cylindrical wall portion 24 that hangs downward from the outer peripheral edge of the cylindrical wall portion 24. Further, the outer fitting wall portion 22 has an outer flange portion 25 for receiving the lower end of the coil spring 3. By receiving the coil spring 3 at the outer flange portion 25, a coil is connected in series with the piston 7. A spring 3 is provided. In other words, the outer flange portion 25 is formed so as to protrude from the lower end edge of the cylindrical wall portion 24 of the outer fitting wall portion 22 in the outer diameter direction, and the coil spring 3 is compactly mounted between the upper mount 20 and the outer flange portion 25. It is. The inner peripheral side of the coil spring 3 is disposed close to the cylindrical wall portion 24 of the outer fitting wall portion 22 and receives guidance (induction) during expansion and contraction while preventing the core center with respect to the shaft center L. Thus, the outer peripheral wall 4 of the bottomed cylindrical barrel 6 is covered with the cylindrical portion 8 (upwardly extending) and the upper surface 4b is covered (enclosed) with the ceiling wall portion 23. Furthermore, since most of the outer peripheral surface 4c is covered with the cylindrical wall portion 24, the inner peripheral surface of the outer peripheral wall 4 where the barrel 6 is in sliding contact with the piston 7 and does not like adhesion of dust or foreign matter. Is reliably protected, the life of the sealing material 26 is maintained sufficiently long, and is excellent in durability.

図３と図４に示した具体的構造では、摺動部材（摺り軸受）19を、バレル６の外周壁４の上端近傍に配設して、円滑にピストン７の円筒部８が（昇降しつつ）摺動するように構成される。さらに、ＵパッキンやＯリング等のシール材26は、外周壁４の上端近傍の内周面に形成した凹周溝16に装着されている。なお、図４中に２点鎖線にて示すように、シール材26Ａをピストン７の円筒部８の下部に付設するも、自由である。さらに、異物（粉塵等）の侵入を防ぐために、ダストシール15を追加するも好ましい。図３と図４ではダストシール15は、外周壁４の上端近傍の外周に凹周溝27を形成して装着している。なお、図４中に２点鎖線にて示すように、円筒壁部24の内周面下端にダストシール15Ａを付設するも、自由である。
図３と図４に於て、図１と図２と同一符号は同様の構成であるので、それ以外の説明を省略する。 In the specific structure shown in FIGS. 3 and 4, a sliding member (sliding bearing) 19 is disposed in the vicinity of the upper end of the outer peripheral wall 4 of the barrel 6 so that the cylindrical portion 8 of the piston 7 can be raised and lowered smoothly. While being configured to slide. Further, a sealing material 26 such as a U-packing or an O-ring is mounted in a concave circumferential groove 16 formed on the inner peripheral surface near the upper end of the outer peripheral wall 4. As shown by a two-dot chain line in FIG. 4, the sealing material 26 A may be attached to the lower portion of the cylindrical portion 8 of the piston 7 as desired. Furthermore, it is also preferable to add a dust seal 15 in order to prevent foreign substances (dust etc.) from entering. 3 and 4, the dust seal 15 is mounted with a concave circumferential groove 27 formed on the outer periphery in the vicinity of the upper end of the outer peripheral wall 4. As shown by a two-dot chain line in FIG. 4, a dust seal 15A may be attached to the lower end of the inner peripheral surface of the cylindrical wall portion 24.
3 and 4, the same reference numerals as those in FIGS. 1 and 2 have the same configuration, and thus the other description is omitted.

次に、図５は別の実施の形態を示し、図１と同一符号は同一の構成であるので、詳細説明は省略するが、相違する点は次の通りである。つまり、ピストン７の（円筒部８の）上端縁11には、バレル６の外周壁４の上面４ｂ全体及び外周面４ｃの上半部位を包囲する外嵌壁部22Ａが、一体状に連設されている。この外嵌壁部22Ａは、図例では、円筒部８の上端縁11に連設された（軸心Ｌと直交方向の）円環平板状の天井壁部23と、この天井壁部23の外周縁から垂設された円筒壁部24とを、有している。しかし、図３と相違する点は、コイルスプリング３の下端を、ピストン７の受圧盤部９の上面９ａにて受持していることである。従って、外嵌壁部22Ａは、肉薄の板金、あるいは、プラスチック等で製作可能であって、図示省略の固着具等にて、図１に例示した上方開口有底状のピストン７に、取付けることも、可能である。なお、図５に示すように、ダストシール15Ａを、この外嵌壁部22Ａの下方開口端内面に、付設すれば、確実に異物のピストン７の摺動面部への、侵入を、阻止できる。
また、図５では、シール材又はダストシールとしてのシール部材28を外周壁４の上端内周面４ａに付設しているが、このようなシール部材28は適宜、付加することも自由であることを、示している。 Next, FIG. 5 shows another embodiment, and since the same reference numerals as those in FIG. 1 have the same configuration, the detailed description is omitted, but the differences are as follows. That is, an outer fitting wall portion 22A surrounding the entire upper surface 4b of the outer peripheral wall 4 of the barrel 6 and the upper half portion of the outer peripheral surface 4c is continuously provided integrally with the upper end edge 11 of the piston 7 (the cylindrical portion 8). Has been. In the illustrated example, the outer fitting wall portion 22A includes an annular flat plate-like ceiling wall portion 23 (in a direction orthogonal to the axis L) connected to the upper end edge 11 of the cylindrical portion 8, and the ceiling wall portion 23. And a cylindrical wall portion 24 suspended from the outer peripheral edge. However, the difference from FIG. 3 is that the lower end of the coil spring 3 is supported by the upper surface 9 a of the pressure receiving plate portion 9 of the piston 7. Accordingly, the outer fitting wall portion 22A can be manufactured from a thin sheet metal, plastic, or the like, and is attached to the piston 7 with the bottom having an upper opening illustrated in FIG. Is also possible. As shown in FIG. 5, if a dust seal 15A is attached to the inner surface of the lower opening end of the outer fitting wall portion 22A, entry of foreign matter into the sliding surface portion of the piston 7 can be reliably prevented.
Further, in FIG. 5, a sealing member 28 as a sealing material or a dust seal is attached to the upper end inner peripheral surface 4 a of the outer peripheral wall 4, but such a sealing member 28 can be freely added as appropriate. Show.

以上をまとめると、図５に示した実施の形態の懸架装置１は、外周壁４と底壁５とを有する上方開口状の有底筒形バレル６に、円筒部８と受圧盤部９とから成る上方開口有底筒形ピストン７を、装着して、バレル６内に流体収納空室部10を形成し、さらに、ピストン７の円筒部８の上端縁11をバレル６の外周壁４よりも上方へ延伸する。そして、ピストン７には、バレル６の外周壁４の上面４ｂ全体及び外周面４の上半部位を包囲する外嵌壁部22Ａが、連設される。さらに、ピストン７の受圧盤部９の上面９ａ側にピストン７と直列的にコイルスプリング３を配設している。 In summary, the suspension device 1 according to the embodiment shown in FIG. 5 includes a cylindrical portion 8, a pressure receiving plate portion 9, and a bottomed cylindrical barrel 6 having an upper opening having an outer peripheral wall 4 and a bottom wall 5. An upper opening bottomed cylindrical piston 7 is mounted to form a fluid storage cavity 10 in the barrel 6, and the upper end 11 of the cylindrical portion 8 of the piston 7 is connected to the outer peripheral wall 4 of the barrel 6. Also extends upward. The piston 7 is continuously provided with an outer fitting wall portion 22A surrounding the entire upper surface 4b of the outer peripheral wall 4 of the barrel 6 and the upper half portion of the outer peripheral surface 4. Further, a coil spring 3 is arranged in series with the piston 7 on the upper surface 9 a side of the pressure receiving plate portion 9 of the piston 7.

なお、図５、又は、図３と図４に於て、有底筒形バレル６の外周面４ｃと、外嵌壁部22，22Ａの内周面29との間に、異物混入防止用のダストシール15, 15Ａを配設して、粉塵等の異物の内方への侵入を阻止しているので、シール材26, 18等の摩耗を防ぎ、耐久性も延びる。そして、上記外周面４ｃと内周面29との間の公差は大きくても良い。
上述した図１〜図５のいずれの実施の形態に於ても、直列的に配設されたピストン７とコイルスプリング３とは、独立して、緩衝装置43が並設されている。 In FIG. 5 or FIG. 3 and FIG. 4, a foreign matter is prevented from entering between the outer peripheral surface 4c of the bottomed cylindrical barrel 6 and the inner peripheral surface 29 of the outer fitting wall portions 22 and 22A. Since the dust seals 15 and 15A are provided to prevent foreign matters such as dust from entering inward, the wear of the sealing materials 26 and 18 is prevented, and the durability is also extended. The tolerance between the outer peripheral surface 4c and the inner peripheral surface 29 may be large.
In any of the above-described embodiments shown in FIGS. 1 to 5, the piston 7 and the coil spring 3 arranged in series are independently provided with a shock absorber 43.

上述したように、本発明では、車体34側に（邪魔な）突起部材38が存在する場合にも、容易に取付可能な懸架装置であるが、仮にこのような突起部材38の無い車種の場合には、ピストン７の内部の空間７ａを活用し、（コイスルプリング３内に、）別の小径コイルスプリングを収納したり、ショックアブソーバを収納（内装）したり、その他、サスペンション特性を改善するために、別の流体圧シリンダや各種センサ類を、収納（内装）するも好ましい（図示省略）。 As described above, according to the present invention, the suspension device can be easily attached even when the (obstructive) projecting member 38 is present on the vehicle body 34 side. However, in the case of a vehicle type without such a projecting member 38. For example, the space 7a inside the piston 7 is utilized to house another small-diameter coil spring (within the coil ring 3), a shock absorber (interior), and other improvements in suspension characteristics. Therefore, it is preferable to house (internally) another fluid pressure cylinder and various sensors (not shown).

図１〜図５に於て、流体として（圧縮性のある）エアを用いる場合、矢印Ｇ方向にエアを送って流体収納空室部10内に供給すると、車高を増大させることができる。逆に、矢印Ｇと逆方向へエアを排出すれば、車高を低下させることができる。 1 to 5, when air (compressible) is used as a fluid, the vehicle height can be increased by supplying the air in the direction of the arrow G and supplying it into the fluid housing space 10. Conversely, if air is discharged in the direction opposite to arrow G, the vehicle height can be reduced.

エアを用いる上述の場合、コイルスプリング３とエアシリンダ２Ａ（流体収納空室部10）とは直列的に配置されている。図示省略するが、エアシリンダ２Ａへの加圧エアの供給は、コンプレッサから、ドライヤ、エアタンク、電磁弁、レギュレーター等を介して行われ、運転席のスイッチにて、電磁弁を開閉させることで、又は機械式切換弁にて、エアシリンダ２Ａへの加圧エアの出し入れを行うようにする。また、コンプレッサの電源は、バッテリーより供給する。 In the above-described case using air, the coil spring 3 and the air cylinder 2A (fluid storage chamber 10) are arranged in series. Although not shown, pressurized air is supplied to the air cylinder 2A from the compressor via a dryer, an air tank, a solenoid valve, a regulator, and the like. By opening and closing the solenoid valve with a switch on the driver's seat, Alternatively, the pressurized air is taken in and out of the air cylinder 2A by a mechanical switching valve. The compressor power is supplied from a battery.

次に、本発明のさらに他の実施の形態について説明すると、流体収納空室部10内に（図示省略の）車載油圧ポンプと油圧弁類に配管13等を介して、非圧縮性流体として、オイルを供給して、ピストン７を上昇・下降させて、車高を調整することも、容易に行い得る。運転中に運転席のスイッチやレバー等によって、電磁弁や手動切換弁を、開閉（切換）して、油圧ポンプからの加圧オイルを矢印Ｇ方向に供給して車高を増加し、逆に、流体収納空室部10内のオイルをタンクへリターンさせて、車高を下げることが（容易に）できる。 Next, still another embodiment of the present invention will be described. As an incompressible fluid, an in-vehicle hydraulic pump and a hydraulic valve (not shown) are connected to the in-fluid chamber 10 via a pipe 13 and the like. It is also easy to adjust the vehicle height by supplying oil and moving the piston 7 up and down. During operation, the solenoid valve and manual switching valve are opened and closed (switched) with the switch and lever of the driver's seat, and the pressurized oil from the hydraulic pump is supplied in the direction of arrow G to increase the vehicle height, conversely The vehicle height can be lowered (easily) by returning the oil in the fluid storage chamber 10 to the tank.

ところで、図６に於て、本発明者が既に（特願２００３−３６４５１０として）提案した懸架装置を示す要部断面図であり、この図６に示す比較例では、上下一方向に開口状の円筒形空間部Ｃ′を形成する、内筒部46と外筒部47と軸心直交方向の壁部45とから成る中空筒形部材41を、備え、該中空筒形部材41の上記円筒形空間部Ｃ′内に円環状ピストン44を装着して、上記円筒形空間部Ｃ′内に於て上記壁部45と該ピストン44の内面48との間に流体収納空室部Ｅ′を形成し、さらに、上記ピストン44の外面49側に直列的にコイルスプリング３を配設した構成である。この図６の比較例でも、元々の車体34側に突起部材38等の邪魔な部材が存在していても（そのまま残して）、容易に装着できる構造である。即ち、突起部材38を、内筒部46の内部に形成された内空間部Ｂ内へ、突入することで、懸架装置と突起部材38との干渉を避けて、懸架装置を、装着できる。この点で、本発明と共通の作用・効果が奏せられる。 6 is a cross-sectional view of the main part showing the suspension device already proposed by the present inventor (as Japanese Patent Application No. 2003-364510). In the comparative example shown in FIG. A hollow cylindrical member 41 comprising an inner cylindrical portion 46, an outer cylindrical portion 47, and a wall portion 45 in a direction orthogonal to the axial center, which forms a cylindrical space C ', and the cylindrical shape of the hollow cylindrical member 41 An annular piston 44 is mounted in the space C ′, and a fluid storage chamber E ′ is formed between the wall 45 and the inner surface 48 of the piston 44 in the cylindrical space C ′. Further, the coil spring 3 is arranged in series on the outer surface 49 side of the piston 44. The comparative example of FIG. 6 also has a structure that can be easily mounted even if a disturbing member such as the protruding member 38 exists on the original vehicle body 34 side (leave it as it is). That is, the projecting member 38 is inserted into the inner space B formed inside the inner cylinder portion 46, so that the suspension device can be mounted while avoiding interference between the suspension device and the projecting member 38. In this respect, the same operations and effects as the present invention can be achieved.

しかし、この比較例の構造では、密封箇所が内周側シール部51及び外周側シール部52の（合計）２箇所を要する。従って、図１と図２で述べた本願発明と比較すれば、以下のような問題点が残されている。（イ）シールパッキンやダストシール等の部品が２倍必要となり、コストアップする。（ロ）流体の外部漏洩の危険性が２倍となる。（ハ）シールパッキン等の摺動面に相当する、内筒部46外面と外筒部47内面を、ホーニング仕上げ等の精密加工せねばならないので加工が極めて難しく、製造が容易でない。（ニ）内周・外周側シール部51, 52に粉塵や異物が侵入し易く摺動面が摩耗しやすい。 However, in the structure of this comparative example, two (total) sealing locations are required, that is, the inner peripheral side seal portion 51 and the outer peripheral side seal portion 52. Therefore, the following problems remain when compared with the present invention described in FIG. 1 and FIG. (B) Parts such as seal packing and dust seal are required twice, which increases costs. (B) The risk of external leakage of fluid is doubled. (C) Since the outer surface of the inner tube portion 46 and the inner surface of the outer tube portion 47 corresponding to the sliding surfaces of seal packing and the like must be precisely processed such as honing finish, the processing is extremely difficult and the manufacture is not easy. (D) Dust and foreign matter are likely to enter the inner and outer seal portions 51 and 52, and the sliding surface is likely to wear.

これに対し、本願発明の図１と図２に示した懸架装置では、密封箇所が半減でき、シール材18・ダストシール15の必要数が半分となりコストダウンを図ることが可能であり、流体の外部漏洩の危険性も低減でき、さらに、ホーニング加工等の精密加工箇所も減少でき、かつ、その加工も容易である、という著大な効果が発揮される。さらに、使用環境の劣悪な懸架装置に於て、異物（粉塵等）がシールの摺動面に侵入しにくく、シールの耐久性に優れる。 On the other hand, in the suspension device shown in FIGS. 1 and 2 of the present invention, the number of sealing portions can be reduced by half, the number of sealing materials 18 and dust seals 15 can be halved, and the cost can be reduced. There is a remarkable effect that the risk of leakage can be reduced, the number of precision machining parts such as honing can be reduced, and the machining is easy. Furthermore, in a suspension device having a poor operating environment, foreign matter (dust, etc.) is unlikely to enter the sliding surface of the seal, and the durability of the seal is excellent.

次に、図６の比較例と、図３と図４及び図５に示した本願発明の別の実施形態と比較すると、本願発明では、外嵌壁部22によって、各シール材26, （26Ａ，）28, 18等が、外部から粉塵等の異物が侵入しないように包囲（被覆）されており、これらの耐久性が優れ、また、これらを摺動する密封面の耐久性も優れたものとなる。さらに、外周壁４の外周面４ｃ、及び、円筒壁部24の内周面29は、比較的仕上げ粗さがラフでも十分であり、図４と図５に示すようにギャップＨが存在しても良い───ダストシール15, 15Ａの摺接面に過ぎない───ので、製作は、図６の比較例よりも、容易である。言い換えると、本願発明では、密封箇所が減少可能であり、流体洩れの危険性が著しく低減し、ホーニング加工等の精密加工箇所も減少できる。特に、使用環境の劣悪な懸架装置として、粉塵等の異物がシールの摺動面に侵入しにくく、密封性（シール性）が長期間にわたって維持される。 Next, when compared with the comparative example of FIG. 6 and another embodiment of the present invention shown in FIGS. 3, 4, and 5, in the present invention, the sealing material 26, (26A ,) 28, 18 etc. are surrounded (covered) so that foreign matter such as dust does not enter from the outside, and these have excellent durability, and the durability of the sealing surface that slides them is also excellent It becomes. Further, the outer peripheral surface 4c of the outer peripheral wall 4 and the inner peripheral surface 29 of the cylindrical wall portion 24 are sufficient even if the finish roughness is relatively rough, and there is a gap H as shown in FIGS. Since it is good --- it is only a sliding contact surface of the dust seal 15, 15A ---- manufacturing is easier than the comparative example of FIG. In other words, in the present invention, the number of sealed portions can be reduced, the risk of fluid leakage is significantly reduced, and the number of precision machining locations such as honing can be reduced. In particular, as a suspension device having a poor use environment, foreign matters such as dust are less likely to enter the sliding surface of the seal, and the sealing performance (sealability) is maintained over a long period of time.

次に、図７に於て、本発明者が（特願２００４−５９２０８として）提案した懸架装置を示す要部断面図である。この図７の比較例では、ピストン７が上下方向寸法が小さい円盤状であり、有底底形バレル６の内周面６ａが外部へ露出するので、その露出を防止するためのダストカバー体53を付設せねばならない。
つまり、取付リング54にて、ダストカバー体53の下端縁をピストン７の低い円筒部８の内面に取付け、さらに、ダストカバー体53の上端縁を、ネジリング55, 56にて、バレル６の外周壁４の上端縁に、取付けている。
しかし、この図７の比較例のようなダストカバー体53として、構造的に適当なものが既製品として存在せず、特別に設計せねばならない。しかし、シリンダ２のストロークを例えば50mmとして、蛇腹タイプとすると、限られたスペース内に設置可能な構造のものは設計が難しく、コストも高くなり、あるいは、伸縮性のあるゴム製のカバー体53を適用した場合、耐久性に不安がある。 Next, in FIG. 7, it is principal part sectional drawing which shows the suspension apparatus which this inventor proposed (as Japanese Patent Application No. 2004-59208). In the comparative example of FIG. 7, the piston 7 has a disk shape with a small vertical dimension, and the inner peripheral surface 6a of the bottomed bottom barrel 6 is exposed to the outside. Therefore, a dust cover body 53 for preventing the exposure is provided. Must be attached.
That is, the lower end edge of the dust cover body 53 is attached to the inner surface of the lower cylindrical portion 8 of the piston 7 with the attachment ring 54, and the upper end edge of the dust cover body 53 is attached to the outer periphery of the barrel 6 with the screw rings 55 and 56. It is attached to the upper edge of the wall 4.
However, there is no structurally suitable dust cover body 53 as in the comparative example of FIG. 7, and it must be specially designed. However, if the stroke of the cylinder 2 is set to 50 mm, for example, and the bellows type is used, a structure that can be installed in a limited space is difficult to design, the cost is increased, or an elastic rubber cover body 53 is provided. When applied, there is anxiety about durability.

本発明は、このような問題点を解決して、図１〜図５に示したように、（上記カバー体53を用いずに、）有底筒形バレル６の内周面（シール摺動面）の外部への露出を防止し、シール材18，26（26Ａ）の寿命を延長して、耐久性に優れ、かつ、製造も容易となる。
また、図７の構造では、シリンダ２の全長が長くなってしまう欠点もあり、車種によっては高さ方向のスペースが十分採れないことがある。これに対し、図１〜図５のものでは、十分なストロークを得ることができる。
なお、図示省略したが、図１〜図５に於て、ピストン７がバレル６から上方へ外れてしまわないように、ストッパを付設しても良い。なお、図１と図２の構造のものは、構造が簡素で、製造（加工）が容易でコストを抑えることができるという利点がある。また、図３又は図４のものは、シリンダ２の全長を、比較的短くできるという利点がある。 The present invention solves such problems, and as shown in FIGS. 1 to 5 (without using the cover body 53), the inner peripheral surface (seal sliding) of the bottomed cylindrical barrel 6 Surface) is prevented from being exposed to the outside, the life of the sealing materials 18 and 26 (26A) is extended, the durability is excellent, and the manufacture is facilitated.
In addition, the structure of FIG. 7 has a disadvantage that the entire length of the cylinder 2 becomes long, and a space in the height direction may not be sufficient depending on the vehicle type. On the other hand, in the case of FIGS. 1 to 5, a sufficient stroke can be obtained.
Although not shown, a stopper may be provided in FIGS. 1 to 5 so that the piston 7 does not come off the barrel 6 upward. The structure shown in FIGS. 1 and 2 has an advantage that the structure is simple, the manufacturing (processing) is easy, and the cost can be reduced. Moreover, the thing of FIG. 3 or FIG. 4 has the advantage that the full length of the cylinder 2 can be made comparatively short.

本発明は上述のように、外周壁４と底壁５とを有する上方開口状の有底筒形バレル６に、円筒部８と受圧盤部９を有する上方開口状有底筒形ピストン７を、装着して、上記有底筒形バレル６内に流体収納空室部10を形成し、上記ピストン７の受圧盤部９の上面側にピストン７と直列的にコイルスプリング３を配設し、さらに、上記ピストン７の上記円筒部８の上端縁11を上記有底筒形バレル６の上記外周壁４よりも上方突出状として上記外周壁４の上端内周面４ａを常時ピストン７の上記円筒部８に対面するように構成した（図１，図２参照）ので、有底筒形バレル６の内周面は外部へ露出せず、シール摺動面としてのこの内周面に、粉塵等の異物の付着を確実に防いで、シール材18の寿命も延び、耐久性に優れている。特別にダストカバー体53（図７参照）も不要となる。 In the present invention, as described above, the bottomed cylindrical barrel 6 having the upper opening and the bottom wall 5 having the outer peripheral wall 4 and the bottom wall 5 is provided with the bottomed cylindrical piston 7 having the top opening and the cylindrical portion 8 and the pressure receiving plate portion 9. And mounting, forming a fluid storage cavity 10 in the bottomed cylindrical barrel 6, and arranging a coil spring 3 in series with the piston 7 on the upper surface side of the pressure receiving plate 9 of the piston 7, Further, the upper end edge 11 of the cylindrical portion 8 of the piston 7 protrudes upward from the outer peripheral wall 4 of the bottomed cylindrical barrel 6 so that the upper end inner peripheral surface 4a of the outer peripheral wall 4 is always the cylinder of the piston 7. Since it is configured to face the portion 8 (see FIGS. 1 and 2), the inner peripheral surface of the bottomed cylindrical barrel 6 is not exposed to the outside, and dust or the like is formed on the inner peripheral surface as a seal sliding surface. The foreign material is reliably prevented from adhering, the life of the sealing material 18 is extended, and the durability is excellent. In particular, the dust cover body 53 (see FIG. 7) is also unnecessary.

さらに、シリンダ２の全長を短く設計し易く、その結果、高さ方向のスペースが十分でない車種にも装着できる。あるいは、シリンダ２の全長を同じとした場合のシリンダストロークを長くして車高変化量を大きくできる。そして、本発明の懸架装置は、車体34側に突起部材38が存在していても、車体34側のこの突起部材38を切断したり、溶接にて蓋することなく、装着できる。即ち、上記の突起部材38を、ピストン７の上方開口状の空間７ａに、上方から突入状態で収納可能である。そして、全体の構造が簡易で、製作が比較的に安価であり、粉塵・汚れ・汚泥等が掛る車両下面側に於て、流体圧シリンダ２の外部漏洩を防ぎ、安全性を高め得る。 Furthermore, it is easy to design the entire length of the cylinder 2 to be short, and as a result, it can be mounted on a vehicle type that does not have sufficient space in the height direction. Alternatively, the amount of change in vehicle height can be increased by increasing the cylinder stroke when the overall length of the cylinder 2 is the same. The suspension device of the present invention can be mounted without cutting the protruding member 38 on the side of the vehicle body 34 or covering it by welding even if the protruding member 38 is present on the side of the vehicle body 34. That is, the protruding member 38 can be stored in the upper opening-like space 7a of the piston 7 in a state of entering from above. The overall structure is simple, the manufacturing is relatively inexpensive, and external leakage of the fluid pressure cylinder 2 can be prevented and safety can be improved on the vehicle lower surface side where dust, dirt, sludge and the like are applied.

また、本発明は上述したように、外周壁４と底壁５とを有する上方開口状の有底筒形バレル６に、円筒部８と受圧盤部９とから成る上方開口状有底筒形ピストン７を、装着して、上記有底筒形バレル６内に流体収納空室部10を形成し、さらに、上記ピストン７の上記円筒部８の上端縁11を上記有底筒形バレル６の上記外周壁４よりも上方へ延伸すると共に、該ピストン７には、上記有底筒形バレル６の上記外周壁４の上面４ｂ全体及び外周面４ｃの上半部位を包囲する外嵌壁部22が、一体状に連設され、かつ、該外嵌壁部22はコイルスプリング３を受持する外鍔部25を有し、該外嵌壁部22の外鍔部25にてコイルスプリング３を受持することによって上記ピストン７と直列的にコイルスプリング３を配設した構造（図３，図４参照）であるので、有底筒形バレル６の内周面及びピストン７の円筒部８の外周面が、外嵌壁部22にて外部から遮蔽され、シール摺動面部位が確実に被覆されて粉塵や異物の侵入を防ぎ、シール材26, 26Ａの寿命も延び、長期間、優れた密封性（シール性）を維持でき、かつ、ダストカバー体53（図７参照）も省略できる。さらに、外嵌壁部22は外鍔部25を有してコイルスプリング３を受持する部材の役目も兼用して、全体の構造の簡素化とコンパクト化が図られている。また、シリンダ２の全長を短く設計し易く、その結果、高さ方向のスペースが十分でない車種にも装着できる。あるいは、シリンダ２の全長を同じとした場合のシリンダストロークを長くして車高変化量を大きくできる。そして、本発明の懸架装置は、車体34側に突起部材38が存在していても、車体34側のこの突起部材38を切断したり、溶接にて蓋することなく、装着できる。即ち、上記の突起部材38を、ピストン７の上方開口状の空間７ａに、上方から突入状態で収納可能である。 In addition, as described above, the present invention has a bottomed cylindrical barrel 6 having a cylindrical portion 8 and a pressure receiving plate portion 9 on a bottomed cylindrical barrel 6 having an outer peripheral wall 4 and a bottom wall 5. A piston 7 is attached to form a fluid storage cavity 10 in the bottomed cylindrical barrel 6, and an upper end edge 11 of the cylindrical portion 8 of the piston 7 is connected to the bottomed cylindrical barrel 6. An outer fitting wall portion 22 that extends upward from the outer peripheral wall 4 and surrounds the entire upper surface 4b of the outer peripheral wall 4 of the bottomed cylindrical barrel 6 and the upper half portion of the outer peripheral surface 4c. However, the outer fitting wall portion 22 has an outer flange portion 25 for receiving the coil spring 3, and the coil spring 3 is attached to the outer flange portion 25 of the outer fitting wall portion 22. Since the coil spring 3 is arranged in series with the piston 7 by being held (see FIGS. 3 and 4), The inner peripheral surface of the cylindrical barrel 6 and the outer peripheral surface of the cylindrical portion 8 of the piston 7 are shielded from the outside by the outer fitting wall portion 22, and the seal sliding surface portion is reliably covered to prevent intrusion of dust and foreign matter. Further, the lifetime of the sealing materials 26 and 26A can be extended, excellent sealing performance (sealing performance) can be maintained for a long time, and the dust cover body 53 (see FIG. 7) can be omitted. Further, the outer fitting wall portion 22 has an outer flange portion 25 and also serves as a member for receiving the coil spring 3, so that the overall structure is simplified and made compact. Moreover, it is easy to design the overall length of the cylinder 2 to be short, and as a result, it can be mounted on a vehicle type that does not have sufficient space in the height direction. Alternatively, the amount of change in vehicle height can be increased by increasing the cylinder stroke when the overall length of the cylinder 2 is the same. The suspension device of the present invention can be mounted without cutting the protruding member 38 on the side of the vehicle body 34 or covering it by welding even if the protruding member 38 is present on the side of the vehicle body 34. That is, the protruding member 38 can be stored in the upper opening-like space 7a of the piston 7 in a state of entering from above.

また、本発明は上述したように、外周壁４と底壁５とを有する上方開口状の有底筒形バレル６に、円筒部８と受圧盤部９とから成る上方開口状有底筒形ピストン７を、装着して、上記有底筒形バレル６内に流体収納空室部10を形成し、さらに、上記ピストン７の上記円筒部８の上端縁11を上記有底筒形バレル６の上記外周壁４よりも上方へ延伸すると共に、該ピストン７には、上記有底筒形バレル６の上記外周壁４の上面４ｂ全体及び外周面４ｃの上半部位を包囲する外嵌壁部22Ａが、連設され、さらに、上記ピストン７の受圧盤部９の上面９ａ側にピストン７と直列的にコイルスプリング３を配設した（図５参照）ので、有底筒形バレル６の内周面及びピストン７の円筒部８の外周面が、外嵌壁部22Ａにて外部から遮蔽され、シール摺動面部位が確実に被覆されて粉塵や異物の侵入を防ぎ、シール材18, 28の寿命も延び、長期間、優れた密封性（シール性）を維持でき、かつ、ダストカバー体53（図７参照）も省略できる。さらに、外嵌壁部22Ａは、ほとんど外力を受けないので肉薄板金としたりプラスチック材等とすることも可能であり、ダストシール15Ａの保持部材としての役目も兼用して、構造の簡素化と軽量化も図り易い利点がある。また、シリンダ２の全長を短く設計し易く、その結果、高さ方向のスペースが十分でない車種にも装着できる。あるいは、シリンダ２の全長を同じとした場合のシリンダストロークを長くして車高変化量を大きくできる。そして、本発明の懸架装置は、車体34側に突起部材38が存在していても、車体34側のこの突起部材38を切断したり、溶接にて蓋することなく、装着できる。即ち、上記の突起部材38を、ピストン７の上方開口状の空間７ａに、上方から突入状態で収納可能である。 In addition, as described above, the present invention has a bottomed cylindrical barrel 6 having a cylindrical portion 8 and a pressure receiving plate portion 9 on a bottomed cylindrical barrel 6 having an outer peripheral wall 4 and a bottom wall 5. A piston 7 is attached to form a fluid storage cavity 10 in the bottomed cylindrical barrel 6, and an upper end edge 11 of the cylindrical portion 8 of the piston 7 is connected to the bottomed cylindrical barrel 6. The outer fitting wall portion 22A extends upward from the outer peripheral wall 4 and surrounds the entire upper surface 4b of the outer peripheral wall 4 and the upper half portion of the outer peripheral surface 4c of the bottomed cylindrical barrel 6 on the piston 7. Further, since the coil spring 3 is disposed in series with the piston 7 on the upper surface 9a side of the pressure receiving plate portion 9 of the piston 7 (see FIG. 5), the inner circumference of the bottomed cylindrical barrel 6 is The outer peripheral surface of the cylindrical portion 8 of the surface and the piston 7 is shielded from the outside by the outer fitting wall portion 22A, and the seal sliding surface portion Is reliably covered to prevent dust and foreign matter from entering, the life of the sealing materials 18 and 28 is extended, and excellent sealing (sealability) can be maintained for a long time, and the dust cover 53 (see FIG. 7) Can also be omitted. Furthermore, since the external fitting wall portion 22A receives almost no external force, it can be made of a thin sheet metal or a plastic material, and also serves as a holding member for the dust seal 15A, thereby simplifying the structure and reducing the weight. There is an advantage that it is easy to plan. Moreover, it is easy to design the overall length of the cylinder 2 to be short, and as a result, it can be mounted on a vehicle type that does not have sufficient space in the height direction. Alternatively, the amount of change in vehicle height can be increased by increasing the cylinder stroke when the overall length of the cylinder 2 is the same. The suspension device of the present invention can be mounted without cutting the protruding member 38 on the side of the vehicle body 34 or covering it by welding even if the protruding member 38 is present on the side of the vehicle body 34. That is, the protruding member 38 can be stored in the upper opening-like space 7a of the piston 7 in a state of entering from above.

また、有底筒形バレル６の外周壁４の上端内周面４ａに、異物侵入防止用のダストシール15を付設することにより、シリンダ２のシール材18, 26, 26Ａの寿命を延長して、密封性（シール性）が十分長く維持できる。
また、有底筒形バレル６の外周壁４の外周面４ｃと、上記外嵌壁部22，22Ａの内周面29との間に、異物混入防止用のダストシール15，15Ａを配設することにより、シリンダ２のシール摺接面への粉塵等の異物（ダスト）の侵入を、一層確実に防止して、シール材18, 26, 26Ａ，28等の寿命を延長して、密封性（シール性）が確保できる。 In addition, by attaching a dust seal 15 for preventing foreign matter intrusion to the inner peripheral surface 4a of the upper end of the outer peripheral wall 4 of the bottomed cylindrical barrel 6, the life of the sealing material 18, 26, 26A of the cylinder 2 is extended, Sealability (sealability) can be maintained long enough.
Also, dust seals 15 and 15A for preventing foreign matter from entering are disposed between the outer peripheral surface 4c of the outer peripheral wall 4 of the bottomed cylindrical barrel 6 and the inner peripheral surface 29 of the outer fitting wall portions 22 and 22A. This prevents dust and other foreign matter (dust) from entering the seal sliding contact surface of the cylinder 2 more reliably, prolongs the life of the sealing materials 18, 26, 26A, 28, etc. Property).

また、上記流体収納空室部10内にエアを密封すれば、圧縮弾性変形自在なエアシリンダ２Ａが形成され、車高調整が容易である。また、上記流体収納空室部10内にエアを密封状に収納してエアシリンダ２Ａを構成すると共に該エアを出し入れして車高を調整するように構成したので、例えば、高速走行時には、車高を下げて安定走行ができ、他方、悪路走行時には、車高を高くして車体底壁と岩石等との干渉を防ぐことができる。 Further, if air is sealed in the fluid housing vacant space 10, an air cylinder 2A that can be compressed and elastically deformed is formed, and the vehicle height can be easily adjusted. Further, since the air is sealed in the fluid storage space 10 to form the air cylinder 2A and the vehicle height is adjusted by taking the air in and out, for example, when driving at high speed, The vehicle can be stably driven at a low height. On the other hand, when traveling on a rough road, the vehicle height can be increased to prevent interference between the bottom wall of the vehicle body and rocks.

あるいは、上記流体収納空室部10内にオイルを出し入れして車高を調整するように構成したとすれば、従来の図８と同様の特性を保ちつつ、車高を確実かつ迅速に調整することが可能となる。また、直列的に配設された上記ピストン７とコイルスプリング３とは独立して、緩衝装置43が並設すれば、流体圧シリンダ２とコイルスプリング３の近傍をコンパクトにまとめて、車体34と車軸35の間に架装しやすいという利点がある。 Alternatively, if the vehicle height is adjusted by putting oil into and out of the fluid storage vacant space 10, the vehicle height can be adjusted reliably and quickly while maintaining the same characteristics as in FIG. It becomes possible. Further, if the shock absorber 43 is provided in parallel with the piston 7 and the coil spring 3 arranged in series, the vicinity of the fluid pressure cylinder 2 and the coil spring 3 can be compactly gathered, There is an advantage that it is easy to mount between the axles 35.

本発明の実施の一形態を示す一部断面正面図である。It is a partial cross section front view which shows one Embodiment of this invention. 要部拡大断面図である。It is a principal part expanded sectional view. 他の実施の形態を示す一部断面正面図である。It is a partial cross section front view which shows other embodiment. 要部拡大断面図である。It is a principal part expanded sectional view. 別の実施の形態を示す一部断面正面図である。It is a partial cross section front view which shows another embodiment. 比較例を示す一部断面正面図である。It is a partial cross section front view which shows a comparative example. 他の比較例を示す一部断面正面図である。It is a partial cross section front view which shows another comparative example. 本発明に係る懸架装置を装着する前の状態を示した説明図である。It is explanatory drawing which showed the state before mounting | wearing with the suspension apparatus which concerns on this invention. 従来例を示す一部断面正面図である。It is a partial cross section front view which shows a prior art example.

Explanation of symbols

１懸架装置
２流体圧シリンダ
２Ａエアシリンダ
３コイルスプリング
４外周壁
４ａ上端内周面
４ｂ上面
４ｃ外周面
５底壁
６有底筒形バレル
７ピストン
８円筒部
９受圧盤部
10 流体収納空室部 11 上端縁
15 ダストシール
22，22Ａ外嵌壁部
25 外鍔部
29 内周面
34 車体
35 車軸
38 突起部材
43 緩衝装置 DESCRIPTION OF SYMBOLS 1 Suspension device 2 Fluid pressure cylinder 2A Air cylinder 3 Coil spring 4 Outer peripheral wall 4a Upper end inner peripheral surface 4b Upper surface 4c Outer peripheral surface 5 Bottom wall 6 Bottomed barrel barrel 7 Piston 8 Cylindrical part 9 Pressure receiving part
10 Fluid storage space 11 Upper edge
15 Dust seal
22, 22A external fitting wall
25 Outer part
29 Inner circumference
34 body
35 axles
38 Protruding member
43 Shock absorber

Claims

An upwardly open bottomed cylindrical piston having a cylindrical part (8) and a pressure receiving plate part (9) in an upwardly open bottomed cylindrical barrel (6) having an outer peripheral wall (4) and a bottom wall (5) (7) is mounted to form a fluid storage cavity (10) in the bottomed cylindrical barrel (6), and a piston (9) on the upper surface side of the pressure receiving plate (9) of the piston (7). 7) a coil spring (3) is disposed in series with the upper end edge (11) of the cylindrical portion (8) of the piston (7) and the outer peripheral wall of the bottomed cylindrical barrel (6). A suspension device characterized in that the upper end inner peripheral surface (4a) of the outer peripheral wall (4) always faces the cylindrical portion (8) of the piston (7) so as to protrude upward from (4). .

A bottomed cylindrical barrel (6) having an upper opening shape having an outer peripheral wall (4) and a bottom wall (5), and an upper opening shape bottomed cylindrical shape comprising a cylindrical portion (8) and a pressure receiving plate portion (9). A piston (7) is mounted to form a fluid storage chamber (10) in the bottomed cylindrical barrel (6), and an upper edge of the cylindrical portion (8) of the piston (7). (11) extends upward from the outer peripheral wall (4) of the bottomed cylindrical barrel (6), and the piston (7) has the outer peripheral wall of the bottomed cylindrical barrel (6) ( 4) The outer fitting wall portion (22) surrounding the entire upper surface (4b) and the upper half portion of the outer peripheral surface (4c) is integrally connected, and the outer fitting wall portion (22) is a coil spring. The piston (7) has an outer flange portion (25) for receiving (3), and the coil spring (3) is received by the outer flange portion (25) of the outer fitting wall portion (22). Suspension system being characterized in that disposed in series to the coil spring (3).

A bottomed cylindrical barrel (6) having an upper opening shape having an outer peripheral wall (4) and a bottom wall (5), and an upper opening shape bottomed cylindrical shape comprising a cylindrical portion (8) and a pressure receiving plate portion (9). A piston (7) is mounted to form a fluid storage chamber (10) in the bottomed cylindrical barrel (6), and an upper edge of the cylindrical portion (8) of the piston (7). (11) extends upward from the outer peripheral wall (4) of the bottomed cylindrical barrel (6), and the piston (7) has the outer peripheral wall of the bottomed cylindrical barrel (6) ( 4) an outer fitting wall portion (22A) surrounding the entire upper surface (4b) and the upper half portion of the outer peripheral surface (4c) is provided continuously, and further, the upper surface of the pressure receiving plate portion (9) of the piston (7). (9a) A suspension device comprising a coil spring (3) arranged in series with the piston (7) on the side of (9a).

The suspension system according to claim 1, 2, or 3, wherein a dust seal (15) for preventing entry of foreign matter is attached to the upper end inner peripheral surface (4a) of the outer peripheral wall (4) of the bottomed cylindrical barrel (6).

Between the outer peripheral surface (4c) of the outer peripheral wall (4) of the bottomed cylindrical barrel (6) and the inner peripheral surface (29) of the outer fitting wall portions (22) (22A) The suspension device according to claim 2 or 3, wherein a dust seal (15) (15A) is provided.

An air cylinder (2A) is configured by sealingly storing air in the fluid storage space (10), and the vehicle height is adjusted by taking in and out the air. , 4 or 5.

The suspension system according to claim 1, 2, 3, 4 or 5, wherein the vehicle height is adjusted by putting oil into and out of the fluid housing empty space (10).

The said piston (7) arrange | positioned in series and the coil spring (3) are independent, and the buffering device (43) is arranged in parallel, Claim 1, 2, 3, 4, 5, 6 or 7. The suspension device according to 7.