JP2002061696A - Structure of fixing bottom of hydraulic shock absorber - Google Patents
Structure of fixing bottom of hydraulic shock absorberInfo
- Publication number
- JP2002061696A JP2002061696A JP2000248967A JP2000248967A JP2002061696A JP 2002061696 A JP2002061696 A JP 2002061696A JP 2000248967 A JP2000248967 A JP 2000248967A JP 2000248967 A JP2000248967 A JP 2000248967A JP 2002061696 A JP2002061696 A JP 2002061696A
- Authority
- JP
- Japan
- Prior art keywords
- bottom piece
- outer cylinder
- cap
- inner cylinder
- cylinder
- 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.)
- Granted
Links
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は油圧緩衝器のボトム
固定構造に関する。The present invention relates to a bottom fixing structure for a hydraulic shock absorber.
【０００２】[0002]
【従来の技術】従来、油圧緩衝器として、特開平11-182
610号公報に記載の如く、外筒の内周壁にリブによって
内筒の外周壁を一体に結合したものがある。この油圧緩
衝器では、内筒の上端部と外筒の上端部の間にピストン
ロッドのための軸封部を固定し、内筒の下端部と外筒の
下端部の間にボトムピースを固定している。2. Description of the Related Art Conventionally, as a hydraulic shock absorber, Japanese Unexamined Patent Publication No.
As described in Japanese Patent Publication No. 610, there is one in which the outer peripheral wall of the inner cylinder is integrally connected to the inner peripheral wall of the outer cylinder by a rib. In this hydraulic shock absorber, the shaft seal for the piston rod is fixed between the upper end of the inner cylinder and the upper end of the outer cylinder, and the bottom piece is fixed between the lower end of the inner cylinder and the lower end of the outer cylinder. are doing.
【０００３】この内外筒一体化構造の油圧緩衝器によれ
ば、外筒がリブを介して内筒に支持され、外筒の剛性を
高めることができるし、内、外筒をリブによってセンタ
リングし、組付作業性も向上できる。According to the hydraulic shock absorber having the integrated structure of the inner and outer cylinders, the outer cylinder is supported by the inner cylinder via the rib, so that the rigidity of the outer cylinder can be increased, and the inner and outer cylinders are centered by the rib. Also, assembling workability can be improved.
【０００４】[0004]
【発明が解決しようとする課題】内外筒を一体化した油
圧緩衝器では、内筒の端部に予めボトムピースを圧入等
したサブ組立体を外筒に入れて組立てることができな
い。そこで、従来技術では、ボトムピースを内筒に嵌合
した後、ボトムピースをキャップにより保持するため、
キャップを外筒の端部に溶接している。このため、以下
の問題点がある。In a hydraulic shock absorber in which the inner and outer cylinders are integrated, it is not possible to assemble a sub-assembly in which a bottom piece is press-fitted into the end of the inner cylinder in advance. Therefore, in the prior art, after fitting the bottom piece to the inner cylinder, the bottom piece is held by the cap,
The cap is welded to the end of the outer cylinder. Therefore, there are the following problems.
【０００５】ボトムピースを組込んだ後に溶接工程を
伴うため、溶接スパッタが外筒の内部に入る可能性があ
り、これがボトムピースのバルブ類を汚損し油圧緩衝器
の品質を損なう。[0005] Since the welding process is involved after the bottom piece is assembled, welding spatter may enter the inside of the outer cylinder, which fouls the valves of the bottom piece and impairs the quality of the hydraulic shock absorber.
【０００６】溶接は内外筒の加工ラインで行なうのが
一般的であり、ボトムピースやキャップを組込み済の内
外筒のその後の組立ラインまでの物流段階で、内外筒の
内部にゴミ等が入る可能性がある。ボトムピースやキャ
ップが組込み済の内外筒の内部を洗浄し、ゴミを除去す
るには多大な困難がある。[0006] Generally, welding is performed in a processing line for the inner and outer cylinders, and dust and the like can enter the inner and outer cylinders during the distribution stage of the inner and outer cylinders having the bottom pieces and caps assembled therein until the subsequent assembly line. There is. There is a great deal of difficulty in cleaning the inside of the inner and outer cylinders with the bottom piece and cap already installed and removing dust.
【０００７】本発明の課題は、内外筒一体化構造の油圧
緩衝器において、内筒にボトムピースを組込んだ後に溶
接を伴うことを不要とし、内筒へのボトムピースの組込
みを組立ラインで行なえるようにし、油圧緩衝器の品質
を簡易に向上することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic shock absorber having an inner and outer cylinder integrated structure, which eliminates the need for welding after assembling the bottom piece into the inner cylinder, and assembling the bottom piece into the inner cylinder on an assembly line. And to easily improve the quality of the hydraulic shock absorber.
【０００８】[0008]
【課題を解決するための手段】請求項１の発明は、外筒
の内周壁にリブによって内筒の外周壁を一体に結合し、
内筒の内部の油室と、内筒と外筒の間のリザーバ室とを
仕切るボトムピースを内筒の下端部と外筒の下端部の間
に固定してなる油圧緩衝器のボトム固定構造において、
ボトムピースを内筒に嵌合し、ボトムピースをキャップ
により保持するとともに、キャップを外筒の端部に加締
め、ネジ結合又は圧入により固定するようにしたもので
ある。According to the present invention, the outer peripheral wall of the inner cylinder is integrally connected to the inner peripheral wall of the outer cylinder by a rib,
Hydraulic shock absorber bottom fixing structure in which a bottom piece that partitions an oil chamber inside the inner cylinder and a reservoir chamber between the inner cylinder and the outer cylinder is fixed between a lower end of the inner cylinder and a lower end of the outer cylinder. At
The bottom piece is fitted to the inner cylinder, the bottom piece is held by the cap, and the cap is caulked to the end of the outer cylinder and fixed by screw connection or press fitting.
【０００９】請求項２の発明は、請求項１に記載の発明
において更に、前記ボトムピースをキャップに結合して
なるようにしたものである。According to a second aspect of the present invention, in the first aspect, the bottom piece is further connected to a cap.
【００１０】請求項３の発明は、外筒の内周壁にリブに
よって内筒の外周壁を一体に結合し、内筒の内部の油室
と、内筒と外筒の間のリザーバ室とを仕切るボトムピー
スを内筒の下端部と外筒の下端部の間に固定してなる油
圧緩衝器のボトム固定構造において、ボトムピースを内
筒に嵌合し、ボトムピースをキャップにより保持すると
ともに、キャップを外筒の端部に嵌合し、キャップを保
持する固定部材を外筒の端部に加締め、ネジ結合又は圧
入により固定するようにしたものである。According to a third aspect of the present invention, the outer peripheral wall of the inner cylinder is integrally connected to the inner peripheral wall of the outer cylinder by a rib, and an oil chamber inside the inner cylinder and a reservoir chamber between the inner cylinder and the outer cylinder are formed. In the bottom fixing structure of the hydraulic shock absorber in which the partitioning bottom piece is fixed between the lower end of the inner cylinder and the lower end of the outer cylinder, the bottom piece is fitted to the inner cylinder, and the bottom piece is held by the cap, The cap is fitted to the end of the outer cylinder, and a fixing member for holding the cap is caulked to the end of the outer cylinder and fixed by screw connection or press fitting.
【００１１】請求項４の発明は、請求項３の発明におい
て更に、前記固定部材がナックルブラケットであるよう
にしたものである。According to a fourth aspect of the present invention, in addition to the third aspect, the fixing member is a knuckle bracket.
【００１２】請求項５の発明は、外筒の内周壁にリブに
よって内筒の外周壁を一体に結合し、内筒の内部の油室
と、内筒と外筒の間のリザーバ室とを仕切るボトムピー
スを内筒の下端部と外筒の下端部の間に固定してなる油
圧緩衝器のボトム固定構造において、キャップを一端部
に固定した外筒の他端部からボトムピースを挿入し、該
ボトムピースを内筒に嵌合し、該ボトムピースをキャッ
プに結合するようにしたものである。According to a fifth aspect of the present invention, the outer peripheral wall of the inner cylinder is integrally connected to the inner peripheral wall of the outer cylinder by a rib, and an oil chamber inside the inner cylinder and a reservoir chamber between the inner cylinder and the outer cylinder are formed. In the bottom fixing structure of the hydraulic shock absorber in which the partitioning bottom piece is fixed between the lower end of the inner cylinder and the lower end of the outer cylinder, the bottom piece is inserted from the other end of the outer cylinder with the cap fixed to one end. , The bottom piece is fitted to the inner cylinder, and the bottom piece is connected to the cap.
【００１３】[0013]
【作用】請求項１の発明によれば下記、の作用があ
る。 内外筒一体化構造の油圧緩衝器において、ボトムピー
スを内筒に嵌合した後に、ボトムピースを保持するキャ
ップを外筒の端部に加締め、ネジ結合又は圧入により固
定する。従って、内筒にボトムピースを組込んだ後に溶
接を伴うことを不要とし、溶接スパッタが外筒の内部へ
入る可能性を排除して油圧緩衝器の品質を向上できる。According to the first aspect of the present invention, the following operations are provided. In the hydraulic shock absorber having the integrated structure of the inner and outer cylinders, after the bottom piece is fitted to the inner cylinder, a cap holding the bottom piece is swaged to the end of the outer cylinder and fixed by screw connection or press fitting. Therefore, it is not necessary to involve welding after the bottom piece is assembled in the inner cylinder, and it is possible to improve the quality of the hydraulic shock absorber by eliminating the possibility that welding spatter enters the inside of the outer cylinder.
【００１４】ボトムピースの組込みとキャップの固定
に溶接を伴わないから、これらの組付作業をゴミ等の入
る可能性の少ない組立ラインで行なうことができ、油圧
緩衝器の品質を向上できる。Since welding of the bottom piece and fixing of the cap do not involve welding, these assembling operations can be performed on an assembly line where there is little possibility of dust or the like entering, and the quality of the hydraulic shock absorber can be improved.
【００１５】請求項２の発明によれば下記の作用があ
る。 ボトムピースをキャップに結合したことにより、ボト
ムピースとキャップの組込みを一括して行なうことにな
り、組立工数を削減できる。According to the second aspect of the present invention, the following operations are provided. By coupling the bottom piece to the cap, the bottom piece and the cap can be assembled at once, and the number of assembling steps can be reduced.
【００１６】請求項３の発明によれば下記、の作用
がある。 内外筒一体化構造の油圧緩衝器において、ボトムピー
スを内筒に、キャップを外筒に嵌合した後に、キャップ
を保持する固定部材を外筒の端部に加締め、ネジ結合又
は圧入により固定する。従って、内筒にボトムピースを
組込んだ後に溶接を伴うことを不要とし、溶接スパッタ
が外筒の内部へ入る可能性を排除して油圧緩衝器の品質
を向上できる。According to the third aspect of the invention, the following operations are provided. After fitting the bottom piece to the inner cylinder and the cap to the outer cylinder in the hydraulic shock absorber of the inner and outer cylinder integrated structure, the fixing member holding the cap is caulked to the end of the outer cylinder and fixed by screw connection or press fitting. I do. Therefore, it is not necessary to involve welding after the bottom piece is assembled in the inner cylinder, and it is possible to improve the quality of the hydraulic shock absorber by eliminating the possibility that welding spatter enters the inside of the outer cylinder.
【００１７】ボトムピースのキャップの組込みと固定
部材の固定に溶接を伴わないから、これらの組付作業を
ゴミ等の入る可能性の少ない組立ラインで行なうことが
でき、油圧緩衝器の品質を向上できる。Since welding of the cap of the bottom piece and fixing of the fixing member does not involve welding, these assembling operations can be performed on an assembly line where there is little possibility of dust or the like entering, thereby improving the quality of the hydraulic shock absorber. it can.
【００１８】請求項４の発明によれば下記の作用があ
る。 ナックルブラケットの外筒への固定に溶接を伴わない
から、これを組立ラインで行なうことができる。According to the fourth aspect of the invention, the following operations are provided. Since the fixing of the knuckle bracket to the outer cylinder does not involve welding, this can be performed on the assembly line.
【００１９】請求項５の発明によれば下記、の作用
がある。 内外筒一体化構造の油圧緩衝器において、キャップを
一端部に固定した外筒の他端部からボトムピースを挿入
し、該ボトムピースを内筒に嵌合し、該ボトムピースを
キャップに結合する。従って、内筒にボトムピースを組
込んだ後に溶接を伴うことを不要とし、溶接スパッタが
外筒の内部へ入る可能性を排除して油圧緩衝器の品質を
向上できる。According to the fifth aspect of the invention, the following effects are obtained. In a hydraulic shock absorber having an inner and outer cylinder integrated structure, a bottom piece is inserted from the other end of the outer cylinder having a cap fixed to one end, the bottom piece is fitted to the inner cylinder, and the bottom piece is connected to the cap. . Therefore, it is not necessary to involve welding after the bottom piece is assembled in the inner cylinder, and it is possible to improve the quality of the hydraulic shock absorber by eliminating the possibility that welding spatter enters the inside of the outer cylinder.
【００２０】ボトムピースの組込みに溶接を伴わない
から、この組付作業をゴミ等の入る可能性の少ない組立
ラインで行なうことができ、油圧緩衝器の品質を向上で
きる。Since the welding of the bottom piece does not involve welding, this assembling operation can be performed on an assembly line where there is little possibility of dust or the like entering, and the quality of the hydraulic shock absorber can be improved.
【００２１】[0021]
【発明の実施の形態】図１は第１実施形態の油圧緩衝器
を示す半断面図、図２はダンパチューブの上端部を示す
拡大図、図３はダンパチューブの下端部を示す拡大図、
図４はダンパチューブの横断面図、図５は第２実施形態
のダンパチューブの下端部を示す拡大図、図６は第３実
施形態のダンパチューブの下端部を示す拡大図、図７は
第４実施形態のダンパチューブの下端部を示す拡大図、
図８は第５実施形態のダンパチューブの下端部を示す拡
大図、図９はダンパチューブの変形例を示す横断面図で
ある。1 is a half sectional view showing a hydraulic shock absorber according to a first embodiment, FIG. 2 is an enlarged view showing an upper end of a damper tube, FIG. 3 is an enlarged view showing a lower end of a damper tube,
4 is a cross-sectional view of the damper tube, FIG. 5 is an enlarged view showing a lower end of the damper tube of the second embodiment, FIG. 6 is an enlarged view showing a lower end of the damper tube of the third embodiment, and FIG. An enlarged view showing a lower end portion of the damper tube according to the fourth embodiment.
FIG. 8 is an enlarged view showing a lower end portion of the damper tube according to the fifth embodiment, and FIG. 9 is a cross-sectional view showing a modified example of the damper tube.
【００２２】（第１実施形態）（図１〜図４） 図１は、ストラット型サスペンションを構成する複筒型
式油圧緩衝器１０であり、ダンパチューブ１１を外筒１
２と内筒１３からなる二重管とし、外筒１２、内筒１３
を後述するリブ１４によって同芯に結合している。油圧
緩衝器１０は、外筒１２に内蔵の内筒１３に中空ピスト
ンロッド１５を挿入し、ピストンロッド１５の上端部に
固定の取付ブラケット（不図示）を車体に連結し、外筒
１２の下端部をナックルブラケット１６により車輪側に
連結し、車両の懸架装置を構成する。ナックルブラケッ
ト１６は外筒１２の下端部外周に巻回され、溶接されて
いる。(First Embodiment) (FIGS. 1 to 4) FIG. 1 shows a double-cylinder hydraulic shock absorber 10 constituting a strut-type suspension, in which a damper tube 11 is connected to an outer cylinder 1.
2 and an inner cylinder 13, an outer cylinder 12, an inner cylinder 13
Are concentrically connected by a rib 14 described later. The hydraulic shock absorber 10 includes a hollow piston rod 15 inserted into an inner cylinder 13 built in the outer cylinder 12, a fixed mounting bracket (not shown) fixed to an upper end of the piston rod 15, and a lower end of the outer cylinder 12. The parts are connected to the wheels by knuckle brackets 16 to form a vehicle suspension. The knuckle bracket 16 is wound around the outer periphery of the lower end of the outer cylinder 12 and welded.
【００２３】油圧緩衝器１０は、外筒１２の外周の下ス
プリングシート１７と、ピストンロッド１５の上端部の
取付ブラケットにスラスト軸受（不図示）を介して背面
支持した上スプリングシート（不図示）の間に懸架ばね
１８を介装している。The hydraulic shock absorber 10 has an upper spring seat (not shown) which is supported on the lower side by a lower spring seat 17 on the outer periphery of the outer cylinder 12 and a mounting bracket at the upper end of the piston rod 15 via a thrust bearing (not shown). A suspension spring 18 is interposed therebetween.
【００２４】油圧緩衝器１０は、内筒１３に挿入される
ピストンロッド１５のためのロッドガイド２１（ブッシ
ュ２２）とオイルシール２３からなる軸封部２０を、内
筒１３の上端部と外筒１２の上端部の間に後述する如く
に固定している。The hydraulic shock absorber 10 includes a shaft seal 20 including a rod guide 21 (a bush 22) for the piston rod 15 inserted into the inner cylinder 13 and an oil seal 23, and an upper end of the inner cylinder 13 and an outer cylinder. 12 and fixed between the upper ends as described later.
【００２５】尚、油圧緩衝器１０は、外筒１２の上端部
にバンプストッパ２４を備え、ピストンロッド１５が備
えるバンプラバー（不図示）をバンプストッパ２４に衝
合せしめて最圧縮ストロークを規制する。また、ピスト
ンロッド１５は内筒１３への挿入部にリバウンドシート
２５、リバウンドラバー２６を備え、リバウンドラバー
２６をロッドガイド２１に衝合せしめて最伸長ストロー
クを規制する。The hydraulic shock absorber 10 has a bump stopper 24 at the upper end of the outer cylinder 12, and a bump rubber (not shown) provided in the piston rod 15 is brought into contact with the bump stopper 24 to regulate the maximum compression stroke. The piston rod 15 is provided with a rebound seat 25 and a rebound rubber 26 at a portion where the piston rod 15 is inserted into the inner cylinder 13. The rebound rubber 26 is brought into contact with the rod guide 21 to regulate the maximum extension stroke.
【００２６】油圧緩衝器１０は、ピストンバルブ装置３
０とベースバルブ装置５０を有し、それらが発生する減
衰力により、懸架ばね１８による衝撃力の吸収に伴うピ
ストンロッド１５の伸縮振動を制振する。The hydraulic shock absorber 10 includes the piston valve device 3
0 and the base valve device 50, and the damping force generated by them suppresses the expansion and contraction vibration of the piston rod 15 due to the absorption of the impact force by the suspension spring 18.
【００２７】（ピストンバルブ装置３０）（図１、図
３） ピストンバルブ装置３０は、図３に示す如く、ピストン
ロッド１５のピストン装着部３１にバルブストッパ３
２、バルブシート３３、チェックバルブ３４、ピストン
３５、ディスクバルブ３６、バルブシート３７、バルブ
ストッパ３８を装着し、これらをナット３９で固定し、
更にピストンロッド１５の外端面を加締加工してこのナ
ット３９の固着化を図っている。そして、ピストン３５
は、内筒１３の内部をピストンロッド１５が収容されな
いピストン側油室４０Ａと、ピストンロッド１５が収容
されるロッド側油室４０Ｂとに区画し、両油室４０Ａ、
４０Ｂを連通する圧側流路４１Ａと伸側流路４１Ｂを備
える。圧側流路４１Ａはチェックバルブ３４により開閉
され、伸側流路４１Ｂはディスクバルブ３６により開閉
される。(Piston Valve Apparatus 30) (FIGS. 1 and 3) As shown in FIG. 3, the piston valve apparatus 30 is provided with a valve stopper 3 on a piston mounting portion 31 of the piston rod 15.
2. A valve seat 33, a check valve 34, a piston 35, a disc valve 36, a valve seat 37, and a valve stopper 38 are mounted, and these are fixed with nuts 39.
Further, the outer end surface of the piston rod 15 is crimped to secure the nut 39. And the piston 35
Partition the interior of the inner cylinder 13 into a piston-side oil chamber 40A in which the piston rod 15 is not accommodated and a rod-side oil chamber 40B in which the piston rod 15 is accommodated.
A pressure-side flow path 41A and a growth-side flow path 41B that communicate with each other are provided. The pressure side flow path 41A is opened and closed by the check valve 34, and the expansion side flow path 41B is opened and closed by the disc valve 36.
【００２８】これにより、油圧緩衝器１０のピストンバ
ルブ装置３０にあっては、圧縮時に、ピストン側油室４
０Ａの油が圧側流路４１Ａを通りチェックバルブ３４を
たわみ変形させて開き、ロッド側油室４０Ｂに導かれ
る。また、伸長時には、ロッド側油室４０Ｂの油が伸側
流路４１Ｂを通りディスクバルブ３６をたわみ変形させ
て開き、ピストン側油室４０Ａに導かれ、伸側減衰力を
生ずる。Thus, in the piston valve device 30 of the hydraulic shock absorber 10, the piston side oil chamber 4
The oil of 0A passes through the pressure-side flow path 41A, deforms and opens the check valve 34, and is guided to the rod-side oil chamber 40B. Further, at the time of extension, the oil in the rod-side oil chamber 40B passes through the extension-side flow path 41B and deflects and opens the disk valve 36, is guided to the piston-side oil chamber 40A, and generates an extension-side damping force.
【００２９】（ベースバルブ装置５０）（図１、図３） 油圧緩衝器１０は、外筒１２と内筒１３の間隙をリザー
バ室５１とし、このリザーバ室５１の内部を油室とガス
室とに区画している。そして、ベースバルブ装置５０
は、外筒１２の下端底部をキャップ５２、Ｏリング５２
Ａによって後述する如くに閉じ、内筒１３の下端部に、
ピストン側油室４０Ａとリザーバ室５１とを仕切るボト
ムピース５３を後述する如くに固定して構成され、この
ボトムピース５３とキャップ５２との間に設けた流路５
４により、リザーバ室５１とピストン側油室４０Ａとを
連絡する。尚、ボトムピース５３にはボルト５５（ナッ
ト５５Ａ）が挿着され、ボルト５５とナット５５Ａの間
にディスクバルブ５６、ボトムピース５３、チェックバ
ルブ５７、ばね５８を介装している。(Base Valve Device 50) (FIGS. 1 and 3) In the hydraulic shock absorber 10, the gap between the outer cylinder 12 and the inner cylinder 13 is defined as a reservoir chamber 51, and the interior of the reservoir chamber 51 is divided into an oil chamber and a gas chamber. Is divided into And the base valve device 50
The cap 52 and the O-ring 52
A closes as described later by A, and at the lower end of the inner cylinder 13,
A bottom piece 53 for partitioning the piston side oil chamber 40A and the reservoir chamber 51 is fixed as described later, and a flow path 5 provided between the bottom piece 53 and the cap 52 is provided.
4 connects the reservoir chamber 51 and the piston side oil chamber 40A. A bolt 55 (nut 55A) is inserted into the bottom piece 53, and a disc valve 56, a bottom piece 53, a check valve 57, and a spring 58 are interposed between the bolt 55 and the nut 55A.
【００３０】即ち、油圧緩衝器１０の圧縮時には、内筒
１３に進入するピストンロッド１５の進入容積分の油が
チェックバルブ５７の開口、ボトムピース５３の流路５
３Ａを通ってディスクバルブ５６をたわみ変形させて開
き、ピストン側油室４０Ａからボトムピース５３の流路
５３Ａ、流路５４経由でリザーバ室５１へ押出され、圧
側の減衰力を得る。That is, when the hydraulic shock absorber 10 is compressed, oil corresponding to the volume of the piston rod 15 entering the inner cylinder 13 is supplied to the opening of the check valve 57 and the flow path 5 of the bottom piece 53.
The disc valve 56 is flexed and opened by passing through 3A, and is extruded from the piston side oil chamber 40A to the reservoir chamber 51 via the flow path 53A and the flow path 54 of the bottom piece 53 to obtain a pressure-side damping force.
【００３１】また、油圧緩衝器１０の伸長時には、内筒
１３から退出するピストンロッド１５の退出容積分の油
が、ばね５８に抗してチェックバルブ５７を押し開き、
リザーバ室５１から流路５４、ボトムピース５３の流路
５３Ｂ経由でピストン側油室４０Ａに補給される。When the hydraulic shock absorber 10 is extended, oil corresponding to the retreat volume of the piston rod 15 retreating from the inner cylinder 13 pushes and opens the check valve 57 against the spring 58.
The oil is supplied from the reservoir chamber 51 to the piston side oil chamber 40A via the flow path 54 and the flow path 53B of the bottom piece 53.
【００３２】然るに、油圧緩衝器１０にあっては、ダン
パチューブ１１の構成、軸封部２０の固定構造、ボトム
ピース５３の固定構造を以下の如くにしている。However, in the hydraulic shock absorber 10, the structure of the damper tube 11, the structure for fixing the shaft sealing portion 20, and the structure for fixing the bottom piece 53 are as follows.
【００３３】(A)ダンパチューブ１１の構成（図１〜図
４） ダンパチューブ１１は、図４に示す如く、外筒１２の内
周壁にリブ１４によって内筒１３の外周壁を一体に結合
している。リブ１４は、外筒１２と内筒１３の周方向に
等間隔に、本実施形態では６本設けられ、外筒１２と内
筒１３の軸方向の略全長に渡り、内筒１３の上端部より
一定長下方まで、内筒１３の下端部より一定長上方まで
の範囲に延在される。リブ１４は、内筒１３の上端部よ
り一定長下方の上端面の上部に、外筒１２と内筒１３の
間の周方向に連続する環状連続空間６１を形成し、軸封
部２０においてピストンロッド１５がブッシュ２２を通
ってロッドガイド２１の上面とオイルシール２３の間に
まで掻上げた油をロッドガイド２１の油戻し路２１Ａか
らリザーバ室５１に戻すとき、この油を環状連続空間６
１から外筒１２と内筒１３の間のリブ１４により区分さ
れたリザーバ室５１の各室（６室）へばらつきなく均等
に分配可能とする。リブ１４は、内筒１３の下端部の一
定長上方の下端面の下部に、外筒１２と内筒１３の間の
周方向に連続する環状連続空間６２を形成し、油圧緩衝
器１０の圧縮時に、ボトムピース５３の流路５３Ａ、流
路５４経由でピストン側油室４０Ａから押出されてくる
油を、環状連続空間６２から外筒１２と内筒１３の間の
リブ１４により区分されたリザーバ室５１の各室（６
室）へばらつきなく均等に分配可能とする。(A) Structure of Damper Tube 11 (FIGS. 1 to 4) As shown in FIG. 4, the damper tube 11 integrally connects the outer peripheral wall of the inner cylinder 13 to the inner peripheral wall of the outer cylinder 12 by a rib 14. ing. In the present embodiment, six ribs 14 are provided at equal intervals in the circumferential direction of the outer cylinder 12 and the inner cylinder 13, and extend over substantially the entire axial length of the outer cylinder 12 and the inner cylinder 13. It extends in a range from a lower end of the inner cylinder 13 to a certain length above the lower end of the inner cylinder 13. The rib 14 forms an annular continuous space 61 that is continuous in the circumferential direction between the outer cylinder 12 and the inner cylinder 13 at an upper portion of an upper end surface that is a fixed length below the upper end of the inner cylinder 13. When the rod 15 returns the oil, which has been lifted by the rod 15 through the bush 22 to between the upper surface of the rod guide 21 and the oil seal 23, from the oil return path 21 </ b> A of the rod guide 21 to the reservoir chamber 51, the oil is transferred to the annular continuous space 6.
1 to each of the reservoir chambers 51 (six chambers) divided by the ribs 14 between the outer cylinder 12 and the inner cylinder 13 so that they can be uniformly distributed without variation. The rib 14 forms an annular continuous space 62 continuous in the circumferential direction between the outer cylinder 12 and the inner cylinder 13 at a lower portion of the lower end surface at a predetermined length above the lower end of the inner cylinder 13, and the compression of the hydraulic shock absorber 10 is performed. Sometimes, the oil that is extruded from the piston-side oil chamber 40A via the flow path 53A and the flow path 54 of the bottom piece 53 is separated from the annular continuous space 62 by the rib 14 between the outer cylinder 12 and the inner cylinder 13. Each room of room 51 (6
Room) can be distributed evenly without any variation.
【００３４】外筒１２と内筒１３とリブ１４は、アルミ
合金によって一体成形され、例えば引き抜き成形又は押
し出し成形により連続的に成形された後、所定長に切断
されて供される。The outer tube 12, the inner tube 13, and the ribs 14 are integrally formed of an aluminum alloy, and are continuously formed by, for example, drawing or extrusion, and then cut to a predetermined length.
【００３５】従って、本実施形態によれば、以下の作用
がある。アルミ合金で内外筒１２、１３を一体成形した
から、外筒１２をリブによって内筒１３に支持して剛性
を高めることにて外筒１２の直径、肉厚を小寸法化でき
ることと相まって、油圧緩衝器１０の全体を軽量化でき
る。Therefore, according to the present embodiment, the following operations are provided. Since the inner and outer cylinders 12 and 13 are integrally formed of an aluminum alloy, the outer cylinder 12 is supported by the inner cylinder 13 with ribs to increase rigidity, and the diameter and thickness of the outer cylinder 12 can be reduced, thereby reducing hydraulic pressure. The overall weight of the shock absorber 10 can be reduced.
【００３６】(B)軸封部２０の固定構造（図２） ダンパチューブ１１は、外筒１２の上端部を内筒１３の
上端部よりも上方に長く延長し、この外筒１２の上端部
と内筒１３の上端部の間の部分に軸封部２０のロッドガ
イド２１（ブッシュ２２）、オイルシール２３を固定し
ている。ロッドガイド２１は、下端側小外径部を内筒１
３の内径に、上端側大外径部を外筒１２の内径に嵌合さ
れるとともに、小外径部の上側段差部を内筒１３の上端
に載せ、その上面にオイルシール２３を載置した状態に
おいて、このオイルシール２３とともに外筒１２の上端
部の加締部７１により固定される。(B) Structure for Fixing Shaft Seal 20 (FIG. 2) The damper tube 11 extends the upper end of the outer cylinder 12 longer than the upper end of the inner cylinder 13. The rod guide 21 (the bush 22) of the shaft sealing portion 20 and the oil seal 23 are fixed to a portion between the shaft guide portion 20 and the upper end of the inner cylinder 13. The rod guide 21 has a small outer diameter portion at the lower end side of the inner cylinder 1.
3, the upper outer diameter portion is fitted to the inner diameter of the outer cylinder 12, the upper step portion of the small outer diameter portion is mounted on the upper end of the inner cylinder 13, and the oil seal 23 is mounted on the upper surface thereof. In this state, it is fixed together with the oil seal 23 by the caulking portion 71 at the upper end of the outer cylinder 12.
【００３７】このとき、外筒１２の上端部の内筒１３の
上端部に対する軸長の延長部分が軸封部２０の及ぼす弾
性的軸力を補うため、内筒１３の上端部と外筒１２の上
端部の間で軸封部２０を挟む範囲内に皿ばね等の圧縮バ
ネ材７２を介装している。本実施形態では、外筒１２の
加締部７１とオイルシール２３の芯金２３Ａの間に圧縮
バネ材７２を挟圧している。At this time, the extension of the axial length of the upper end of the outer cylinder 12 with respect to the upper end of the inner cylinder 13 compensates for the elastic axial force exerted by the shaft sealing portion 20. A compression spring material 72 such as a disc spring is interposed in a range sandwiching the shaft sealing portion 20 between the upper end portions of the spring. In the present embodiment, the compression spring member 72 is pressed between the caulked portion 71 of the outer cylinder 12 and the core bar 23A of the oil seal 23.
【００３８】従って、本実施形態によれば、以下の作用
がある。内外筒一体化のために、外筒１２が軸封部２０
に及ぼす弾性的軸力は、外筒１２の上端部が内筒１３の
上端部に対する軸長が短くなる分だけ小さいものの、圧
縮バネ材７２がこの軸力の低下を補う。即ち、圧縮バネ
材７２が軸封部２０に及ぼす軸力を補い、外筒１２と軸
封部２０のロッドガイド２１の熱膨張量の差や、軸封部
２０のオイルシール２３を形成する心金周囲のゴム材の
劣化に対しても必要な軸力を保持し、軸封部２０にがた
を生じない。Therefore, according to the present embodiment, the following operations are provided. In order to integrate the inner and outer cylinders, the outer cylinder 12 is
, The compression spring member 72 compensates for the decrease in the axial force, although the upper end of the outer cylinder 12 has a smaller axial length with respect to the upper end of the inner cylinder 13. That is, the compression spring member 72 compensates for the axial force exerted on the shaft sealing portion 20, and the difference in the amount of thermal expansion between the outer cylinder 12 and the rod guide 21 of the shaft sealing portion 20 and the core forming the oil seal 23 of the shaft sealing portion 20. The necessary axial force is maintained even when the rubber material around the gold is deteriorated, and the shaft sealing portion 20 does not rattle.
【００３９】(C)ボトムピース５３の固定構造（図３） ダンパチューブ１１は、外筒１２の下端部を内筒１３の
下端部よりも下方に長く延長し、この外筒１２の下端部
と内筒１３の下端部の間の部分にボトムピース５３、キ
ャップ５２（Ｏリング５２Ａ）を固定している。ボトム
ピース５３は、上端側小外径部を内筒１３の内径に嵌合
されるとともに、小外径部の下側段差部を内筒１３の下
端に嵌め、その下面の脚部８１のテーパ状座面をキャッ
プ５２の陥凹座面上にセンタリングさせて着座させた状
態において、このキャップ５２とともに外筒１２の下端
部の加締部８２により固定される。(C) Fixing Structure of Bottom Piece 53 (FIG. 3) The damper tube 11 extends the lower end of the outer cylinder 12 longer than the lower end of the inner cylinder 13 to extend downward. A bottom piece 53 and a cap 52 (O-ring 52A) are fixed to a portion between lower ends of the inner cylinder 13. The bottom piece 53 has a small outer diameter part on the upper end side fitted to the inner diameter of the inner cylinder 13, a lower step part of the small outer diameter part fitted on the lower end of the inner cylinder 13, and a taper of the leg 81 on the lower surface thereof. In a state where the seating surface is centered and seated on the recessed seating surface of the cap 52, the cap 52 is fixed together with the cap 52 by the caulking portion 82 at the lower end of the outer cylinder 12.
【００４０】このとき、外筒１２の下端部の内筒１３の
下端部に対する軸長の延長部分がキャップ５２、ボトム
ピース５３に及ぼす弾性的軸力を補うため、内筒１３の
下端部と外筒１２の下端部の間でキャップ５２、ボトム
ピース５３を挟む範囲内に皿ばね等の圧縮バネ材８３を
介装する。本実施形態では、外筒１２の加締部８２とキ
ャップ５２の端面の間に圧縮バネ材８３を挟圧してい
る。At this time, the extended portion of the lower end of the outer cylinder 12 with respect to the lower end of the inner cylinder 13 compensates for the elastic axial force exerted on the cap 52 and the bottom piece 53. A compression spring material 83 such as a disc spring is interposed in a range where the cap 52 and the bottom piece 53 are sandwiched between the lower ends of the cylinders 12. In the present embodiment, a compression spring material 83 is sandwiched between the caulked portion 82 of the outer cylinder 12 and the end face of the cap 52.
【００４１】これにより、ボトムピース５３の固定手順
は下記(1)〜(4)の如くになる。 (1)油圧緩衝器１０の組立工程でダンパチューブ１１
（外筒１２、内筒１３）を十分洗浄後、ボトムピース５
３（ボトムピース５３にボルト５５、ナット５５Ａでデ
ィスクバルブ５６、チェックバルブ５７、ばね５８を組
付けたサブ組立体）を内筒１３の下端部に嵌合する。Thus, the procedure for fixing the bottom piece 53 is as follows (1) to (4). (1) The damper tube 11 in the assembly process of the hydraulic shock absorber 10
(Outer cylinder 12 and inner cylinder 13) are sufficiently washed, and then the bottom piece 5
3 (a sub-assembly in which the disc valve 56, the check valve 57, and the spring 58 are assembled to the bottom piece 53 with the bolt 55 and the nut 55 </ b> A) is fitted to the lower end of the inner cylinder 13.
【００４２】(2)キャップ５２（Ｏリング５２Ａ）を外
筒１２の下端部に嵌合し、ボトムピース５３の脚部８１
の座面をキャップ５２に着座させた状態として、ボトム
ピース５３をキャップ５２により保持する。(2) The cap 52 (O-ring 52A) is fitted to the lower end of the outer cylinder 12 and the leg 81 of the bottom piece 53 is fitted.
The bottom piece 53 is held by the cap 52 in a state where the seat surface is seated on the cap 52.
【００４３】(3)外筒１２の下端部でキャップ５２に当
接する位置に圧縮バネ材８３を装填する。(3) A compression spring material 83 is loaded at the lower end of the outer cylinder 12 at a position where it contacts the cap 52.
【００４４】(4)外筒１２の下端部を加締め、この加締
部８２によりボトムピース５３、キャップ５２、圧縮バ
ネ材８３を外筒１２の下端部と内筒１３の下端部との間
に挟圧して固定する。(4) The lower end of the outer cylinder 12 is crimped, and the crimping portion 82 moves the bottom piece 53, the cap 52, and the compression spring material 83 between the lower end of the outer cylinder 12 and the lower end of the inner cylinder 13. And fix it.
【００４５】尚、圧縮バネ材８３をキャップ５２とボト
ムピース５３の間に介装し、キャップ５２を上述(4)で
外筒１２の下端部にねじ結合又は圧入するものとしても
良い。The compression spring material 83 may be interposed between the cap 52 and the bottom piece 53, and the cap 52 may be screwed or press-fitted into the lower end of the outer cylinder 12 in the above (4).
【００４６】従って、本実施形態によれば、以下の作用
がある。 内外筒一体化のために、外筒１２がボトムピース５３
に及ぼす弾性的軸力は、外筒１２の下端部が内筒１３の
下端部に対する軸長が短くなる分だけ小さいものの、圧
縮バネ材８３がこの軸力の低下を補う。即ち、圧縮バネ
材８３がボトムピース５３に及ぼす軸力を補い、外筒１
２とボトムピース５３の熱膨張量の差に対しても必要な
軸力を保持し、ボトムピース５３にがたを生じない。Therefore, according to the present embodiment, the following operations are provided. In order to integrate the inner and outer cylinders, the outer cylinder 12 is
, The compression spring member 83 compensates for the decrease in the axial force, although the lower end of the outer cylinder 12 is smaller than the lower end of the inner cylinder 13 by the axial length. That is, the axial force exerted on the bottom piece 53 by the compression spring material 83 is supplemented, and the outer cylinder 1
The required axial force is maintained even for the difference between the thermal expansion amount of the bottom piece 53 and that of the bottom piece 53, and the bottom piece 53 does not rattle.
【００４７】内外筒一体化構造の油圧緩衝器１０にお
いて、ボトムピース５３を内筒１３に嵌合した後に、ボ
トムピース５３を保持するキャップ５２を外筒１２の端
部に加締め、ネジ結合又は圧入により固定する。従っ
て、内筒１３にボトムピース５３を組込んだ後に溶接を
伴うことを不要とし、溶接スパッタが外筒１２の内部へ
入る可能性を排除して油圧緩衝器１０の品質を向上でき
る。In the hydraulic shock absorber 10 having the integrated structure of the inner and outer cylinders, after the bottom piece 53 is fitted to the inner cylinder 13, the cap 52 for holding the bottom piece 53 is swaged to the end of the outer cylinder 12 and screwed or connected. Fix by press fitting. Therefore, it is not necessary to involve welding after the bottom piece 53 is assembled into the inner cylinder 13, and the quality of the hydraulic shock absorber 10 can be improved by eliminating the possibility that welding spatter enters the inside of the outer cylinder 12.
【００４８】ボトムピース５３の組込みとキャップ５
２の固定に溶接を伴わないから、これらの組付作業をゴ
ミ等の入る可能性の少ない組立ラインで行なうことがで
き、油圧緩衝器１０の品質を向上できる。Assembling of bottom piece 53 and cap 5
Since the fixing of No. 2 does not involve welding, these assembling operations can be performed on an assembly line where there is little possibility of dust or the like entering, and the quality of the hydraulic shock absorber 10 can be improved.
【００４９】尚、油圧緩衝器１０において、ボトムピー
ス５３に挿着されるボルト５５のナット５５Ａの側と反
対側の端部をネジ部とし、キャップ５２の中央に設けた
孔にＯリングを介してこのボルト５５のネジ部を挿通
し、その挿通端にナットを螺着することにより、ボトム
ピース５３を予めキャップ５２に結合一体化したサブ組
立体とするものであっても良い。尚、ボトムピース５３
はキャップ５２に、ボルトによらず、嵌合（圧入）一体
化されてサブ組立体とされるものであっても良い。この
場合には、キャップ５２が結合済のボトムピース５３を
上述(1)の如くに内筒１３の下端部に嵌合し、これと同
時にキャップ５２を外筒１２の下端部に嵌合する状態を
得て、上述(3)の如くに外筒１２の下端部でキャップ５
２に当接する位置に圧縮バネ材８３を装填し、上述(4)
の如くに外筒１２の下端部を加締め、この加締部８２に
よりボトムピース５３、キャップ５２、圧縮バネ材８３
を固定するものとなる。これによれば、ボトムピース５
３をキャップ５２に結合したことにより、ボトムピース
５３とキャップ５２の組込みを一括して行なうことにな
り、組立工数を削減できる。In the hydraulic shock absorber 10, the end of the bolt 55 inserted into the bottom piece 53 on the side opposite to the nut 55 A side is a screw part, and an O-ring is inserted through a hole provided in the center of the cap 52. A sub-assembly in which the bottom piece 53 is previously coupled to the cap 52 in an integrated manner by inserting a screw portion of the lever bolt 55 and screwing a nut to the insertion end thereof may be used. In addition, the bottom piece 53
The sub-assembly may be fitted (press-fitted) integrally with the cap 52 without using bolts. In this case, the bottom piece 53 to which the cap 52 has been connected is fitted to the lower end of the inner cylinder 13 as described in (1) above, and at the same time, the cap 52 is fitted to the lower end of the outer cylinder 12. And the cap 5 at the lower end of the outer cylinder 12 as described in (3) above.
2 is loaded with the compression spring material 83 at a position where the compression spring material 83 contacts
The lower end of the outer cylinder 12 is swaged as shown in FIG.
Will be fixed. According to this, the bottom piece 5
By combining the cap 3 with the cap 52, the bottom piece 53 and the cap 52 can be assembled at one time, and the number of assembling steps can be reduced.
【００５０】（第２実施形態）（図５） 第２実施形態が第１実施形態と異なる点は、ボトムピー
ス５３の固定構造にある。(Second Embodiment) (FIG. 5) The second embodiment is different from the first embodiment in the structure for fixing the bottom piece 53.
【００５１】即ち、ダンパチューブ１１は、外筒１２の
下端部を内筒１３の下端部よりも下方に長く延長し、こ
の外筒１２の下端部と内筒１３の下端部の間の部分にボ
トムピース５３、キャップ５２（Ｏリング５２Ａ）、圧
縮バネ材８３を固定している。ボトムピース５３は、上
端側小外径部を内筒１３の内径に嵌合されるとともに、
小外径部の下側段差部を内筒１３の下端に嵌め、その下
面の脚部８１のテーパ状座面をキャップ５２の陥凹座面
上にセンタリングさせて着座させた状態において、この
キャップ５２も内筒１３の下端部に嵌合した上で、キャ
ップ５２、圧縮バネ材８３を保持する固定部材９１を外
筒１２の下端部にネジ結合（加締め又は圧入でも可）す
ることにより固定される。That is, the damper tube 11 extends the lower end of the outer cylinder 12 longer than the lower end of the inner cylinder 13 so as to extend between the lower end of the outer cylinder 12 and the lower end of the inner cylinder 13. The bottom piece 53, the cap 52 (O-ring 52A), and the compression spring material 83 are fixed. The bottom piece 53 has a small outer diameter portion on the upper end side fitted to the inner diameter of the inner cylinder 13,
When the lower step portion of the small outer diameter portion is fitted to the lower end of the inner cylinder 13 and the tapered seating surface of the leg portion 81 on the lower surface thereof is centered on the recessed seating surface of the cap 52 and the cap is seated, 52 is also fitted to the lower end of the inner cylinder 13, and then fixed by screwing (caulking or press-fitting) the fixing member 91 holding the cap 52 and the compression spring material 83 to the lower end of the outer cylinder 12. Is done.
【００５２】これにより、ボトムピース５３の固定手順
は下記(1)〜(4)の如くになる。 (1)油圧緩衝器１０の組立工程でダンパチューブ１１
（外筒１２、内筒１３）を十分洗浄後、ボトムピース５
３（ボトムピース５３にボルト５５、ナット５５Ａでデ
ィスクバルブ５６、チェックバルブ５７、バネ５８を組
付けたサブ組立体）を内筒１３の下端部に嵌合する。Thus, the procedure for fixing the bottom piece 53 is as shown in the following (1) to (4). (1) The damper tube 11 in the assembly process of the hydraulic shock absorber 10
(Outer cylinder 12 and inner cylinder 13) are sufficiently washed, and then the bottom piece 5
3 (a subassembly in which the disc valve 56, the check valve 57, and the spring 58 are assembled to the bottom piece 53 with the bolt 55 and the nut 55A) is fitted to the lower end of the inner cylinder 13.
【００５３】(2)キャップ５２（Ｏリング５２Ａ）を外
筒１２の下端部に嵌合し、ボトムピース５３の脚部８１
の座面をキャップ５２に着座させた状態として、ボトム
ピース５３をキャップ５２により保持する。(2) The cap 52 (O-ring 52A) is fitted to the lower end of the outer cylinder 12 and the leg 81 of the bottom piece 53 is fitted.
The bottom piece 53 is held by the cap 52 in a state where the seat surface is seated on the cap 52.
【００５４】(3)外筒１２の下端部でキャップ５２に当
接する位置に圧縮バネ材８３を装填する。(3) A compression spring material 83 is loaded at a position where the lower end of the outer cylinder 12 comes into contact with the cap 52.
【００５５】(4)外筒１２の下端部に固定部材９１をネ
ジ結合し、この固定部材９１によりボトムピース５３、
キャップ５２、圧縮バネ材８３を外筒１２の下端部と内
筒１３の下端部との間に挟圧して固定する。(4) A fixing member 91 is screwed to the lower end of the outer cylinder 12, and the bottom piece 53,
The cap 52 and the compression spring material 83 are pressed and fixed between the lower end of the outer cylinder 12 and the lower end of the inner cylinder 13.
【００５６】従って、本実施形態によれば、以下の作用
がある。 内外筒一体化構造の油圧緩衝器１０において、ボトム
ピース５３を内筒１３に、キャップ５２を外筒１２に嵌
合した後に、キャップ５２を保持する固定部材９１を外
筒１２の端部に加締め、ネジ結合又は圧入により固定す
る。従って、内筒１３にボトムピース５３を組込んだ後
に溶接を伴うことを不要とし、溶接スパッタが外筒１２
の内部へ入る可能性を排除して油圧緩衝器１０の品質を
向上できる。Therefore, according to the present embodiment, the following operations are provided. In the hydraulic shock absorber 10 having the inner and outer cylinder integrated structure, after the bottom piece 53 is fitted to the inner cylinder 13 and the cap 52 is fitted to the outer cylinder 12, a fixing member 91 for holding the cap 52 is added to the end of the outer cylinder 12. Secure by tightening, screwing or press fitting. Therefore, there is no need to involve welding after the bottom piece 53 is assembled in the inner cylinder 13, and welding spatter is reduced.
The quality of the hydraulic shock absorber 10 can be improved by eliminating the possibility of entering the inside of the hydraulic shock absorber 10.
【００５７】ボトムピース５３のキャップ５２の組込
みと固定部材９１の固定に溶接を伴わないから、これら
の組付作業をゴミ等の入る可能性の少ない組立ラインで
行なうことができ、油圧緩衝器１０の品質を向上でき
る。Since welding of the cap 52 of the bottom piece 53 and fixing of the fixing member 91 does not involve welding, these assembling operations can be performed on an assembly line where there is little possibility of dust or the like entering. Quality can be improved.
【００５８】（第３実施形態）（図６） 第３実施形態が第２実施形態と異なる点は、固定部材９
１と実質的に同一の固定部材９１Ａをナックルブラケッ
ト９２に別工程で予め溶接一体化したことにある。(Third Embodiment) (FIG. 6) The third embodiment is different from the second embodiment in that
That is, the fixing member 91A substantially the same as the fixing member 1 is integrally welded to the knuckle bracket 92 in a separate step.
【００５９】従って、この場合には、第２実施形態の前
述(4)で、ナックルブラケット９２を外筒１２の外周に
ネジ結合（圧入又は加締めでも可）すると同時に、ナッ
クルブラケット９２の固定部材９１Ａを外筒１２の下端
部に結合し、この固定部材９１Ａによりボトムピース５
３、キャップ５２、圧縮バネ材８３を外筒１２の下端部
と内筒１３の下端部との間に挟圧して固定できる。ナッ
クルブラケット９２は回り止め９３により外筒１２の外
周に固定される。Therefore, in this case, the knuckle bracket 92 is screwed (press-fitted or crimped) to the outer periphery of the outer cylinder 12 at the same time as (4) in the second embodiment, and the fixing member of the knuckle bracket 92 is fixed. 91A is connected to the lower end of the outer cylinder 12, and the bottom piece 5 is fixed by the fixing member 91A.
3. The cap 52 and the compression spring member 83 can be fixed by being pressed between the lower end of the outer cylinder 12 and the lower end of the inner cylinder 13. The knuckle bracket 92 is fixed to the outer periphery of the outer cylinder 12 by a detent 93.
【００６０】本実施形態によれば、ナックルブラケット
９２の外筒１２への固定に溶接を伴わないから、これを
組立ラインで行なうことができる。According to the present embodiment, since the fixing of the knuckle bracket 92 to the outer cylinder 12 does not involve welding, this can be performed on an assembly line.
【００６１】（第４実施形態）（図７） 第４実施形態が第１実施形態と異なる点は、ボトムピー
ス５３の固定構造にある。Fourth Embodiment (FIG. 7) The fourth embodiment is different from the first embodiment in the structure for fixing the bottom piece 53.
【００６２】即ち、ダンパチューブ１１は、外筒１２の
下端部を下方に長く延長し、この外筒１２の下端部に設
けた加締部１０３により予めキャップ５２（Ｏリング５
２Ａ）、圧縮バネ材８３を固定している。ボトムピース
５３は、ボルト５５のナット５５Ａの側と反対側の端部
をネジ部５５Ｂとし、外周にＯリング１０１を装着され
た状態で、外筒１２の上端部から内筒１３の内面にＯリ
ング１０１を摺接させながら挿入されて内筒１３に嵌合
し、ボルト５５のねじ部５５Ｂをキャップ５２の中央に
設けた孔にＯリング１０２を介して挿通し、ボルト５５
のその挿通端にナット５５Ｃを螺着すること（圧入又は
加締めでも可）により、キャップ５２に結合される。That is, the damper tube 11 extends the lower end of the outer cylinder 12 long downward, and the cap 52 (O-ring 5) is previously formed by the crimping portion 103 provided at the lower end of the outer cylinder 12.
2A), the compression spring material 83 is fixed. The bottom piece 53 has a threaded portion 55 </ b> B at the end of the bolt 55 opposite to the nut 55 </ b> A, and has an O-ring 101 attached to the outer periphery. The ring 101 is inserted in sliding contact with the inner cylinder 13, and the screw portion 55 B of the bolt 55 is inserted through a hole provided in the center of the cap 52 through the O-ring 102, and
The nut 55C is screwed (press-fit or crimping is also possible) to the insertion end of the cap 52 so as to be connected to the cap 52.
【００６３】これにより、ボトムピース５３の固定手順
は下記(1)〜(3)の如くになる。 (1)油圧緩衝器１０の組立工程でダンパチューブ１１
（外筒１２、内筒１３）を十分洗浄後、キャップ５２を
圧縮バネ材８３とともに外筒１２の下端部に加締め、こ
の加締部１０３により固定する。キャップ５２は切欠部
１０４を備えて流路５４を形成する。Thus, the procedure for fixing the bottom piece 53 is as follows (1) to (3). (1) The damper tube 11 in the assembly process of the hydraulic shock absorber 10
After sufficiently washing (the outer cylinder 12 and the inner cylinder 13), the cap 52 is crimped to the lower end of the outer cylinder 12 together with the compression spring material 83, and is fixed by the crimping portion 103. The cap 52 has a cutout 104 to form a flow path 54.
【００６４】(2)ボトムピース５３（ボトムピース５３
にボルト５５、ナット５５Ａでディスクバルブ５６、チ
ェックバルブ５７、ばね５８を組付けたサブ組立体）を
Ｏリング１０１とともに、外筒１２の上端部から挿入し
て内筒１３の下端部に嵌合する。(2) Bottom piece 53 (bottom piece 53
The sub-assembly in which the disc valve 56, the check valve 57, and the spring 58 are assembled together with the bolt 55 and the nut 55A together with the O-ring 101 from the upper end of the outer cylinder 12 and fitted to the lower end of the inner cylinder 13 I do.
【００６５】(3)ボトムピース５３に締結されているボ
ルト５５のネジ部５５Ｂをキャップ５２に挿通し、その
挿通端にナット５５Ｃを螺着し、ボトムピース５３をキ
ャップ５２に結合する。(3) The threaded portion 55B of the bolt 55 fastened to the bottom piece 53 is inserted into the cap 52, and a nut 55C is screwed to the insertion end, so that the bottom piece 53 is connected to the cap 52.
【００６６】尚、圧縮バネ材８３をキャップ５２と内筒
１３の下端部の間に介装し、キャップ５２を上述(1)で
外筒１２の下端部にネジ結合又は圧入するものとしても
良い。The compression spring member 83 may be interposed between the cap 52 and the lower end of the inner cylinder 13, and the cap 52 may be screwed or pressed into the lower end of the outer cylinder 12 in the above (1). .
【００６７】従って、本実施形態によれば、以下の作用
がある。 内外筒一体化構造の油圧緩衝器１０において、キャッ
プ５２を一端部に固定した外筒１２の他端部からボトム
ピース５３を挿入し、該ボトムピース５３を内筒１３に
嵌合し、該ボトムピース５３をキャップ５２に結合す
る。従って、内筒１３にボトムピース５３を組込んだ後
に溶接を伴うことを不要とし、溶接スパッタが外筒１２
の内部へ入る可能性を排除して油圧緩衝器１０の品質を
向上できる。Therefore, according to the present embodiment, the following operations are provided. In the hydraulic shock absorber 10 having the inner and outer cylinder integrated structure, the bottom piece 53 is inserted from the other end of the outer cylinder 12 having the cap 52 fixed to one end, and the bottom piece 53 is fitted to the inner cylinder 13, The piece 53 is connected to the cap 52. Therefore, there is no need to involve welding after the bottom piece 53 is assembled in the inner cylinder 13, and welding spatter is reduced.
The quality of the hydraulic shock absorber 10 can be improved by eliminating the possibility of entering the inside of the hydraulic shock absorber 10.
【００６８】ボトムピース５３の組込みに溶接を伴わ
ないから、この組付作業をゴミ等の入る可能性の少ない
組立ラインで行なうことができ、油圧緩衝器１０の品質
を向上できる。Since welding is not involved in assembling the bottom piece 53, this assembling operation can be performed on an assembly line where there is little possibility of dust or the like entering, and the quality of the hydraulic shock absorber 10 can be improved.
【００６９】（第５実施形態）（図８） 第５実施形態が第４実施形態と異なる点は、キャップ５
２を外筒１２の下端部に予め溶接により固定したことに
ある。(Fifth Embodiment) (FIG. 8) The fifth embodiment is different from the fourth embodiment in that the cap 5
2 is fixed to the lower end of the outer cylinder 12 in advance by welding.
【００７０】以上、本発明の実施の形態を図面により詳
述したが、本発明の具体的な構成はこの実施の形態に限
られるものではなく、本発明の要旨を逸脱しない範囲の
設計の変更等があっても本発明に含まれる。例えば、本
発明が本発明が適用される油圧緩衝器は、内外筒一体化
構造のものであれば良く、図９に示す如く、外筒１２の
内周壁に一体成形したリブ１４Ａの内径部に内筒１３の
外周壁を加締め、又は圧入して一体結合するものであっ
ても良い。このとき、外筒１２と内筒１３は同一材質に
限らず、異種材質からなるものでも良い。The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design may be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the hydraulic shock absorber to which the present invention is applied may have an inner and outer cylinder integrated structure, and as shown in FIG. The outer peripheral wall of the inner cylinder 13 may be crimped or press-fitted to be integrally joined. At this time, the outer cylinder 12 and the inner cylinder 13 are not limited to the same material but may be made of different materials.
【００７１】[0071]
【発明の効果】以上のように本発明によれば、内外筒一
体化構造の油圧緩衝器において、内筒にボトムピースを
組込んだ後に溶接を伴うことを不要とし、内筒へのボト
ムピースの組込みを組立ラインで行なえるようにし、油
圧緩衝器の品質を簡易に向上することができる。As described above, according to the present invention, in a hydraulic shock absorber having an integrated structure of an inner cylinder and an outer cylinder, it is not necessary to perform welding after the bottom piece is assembled into the inner cylinder, and the bottom piece can be attached to the inner cylinder. Can be assembled on the assembly line, and the quality of the hydraulic shock absorber can be easily improved.
【図１】図１は第１実施形態の油圧緩衝器を示す半断面
図である。FIG. 1 is a half sectional view showing a hydraulic shock absorber according to a first embodiment.
【図２】図２はダンパチューブの上端部を示す拡大図で
ある。FIG. 2 is an enlarged view showing an upper end portion of a damper tube.
【図３】図３はダンパチューブの下端部を示す拡大図で
ある。FIG. 3 is an enlarged view showing a lower end portion of a damper tube.
【図４】図４はダンパチューブの横断面図である。FIG. 4 is a cross-sectional view of the damper tube.
【図５】図５は第２実施形態のダンパチューブの下端部
を示す拡大図である。FIG. 5 is an enlarged view showing a lower end portion of a damper tube according to a second embodiment.
【図６】図６は第３実施形態のダンパチューブの下端部
を示す拡大図である。FIG. 6 is an enlarged view showing a lower end portion of a damper tube according to a third embodiment.
【図７】図７は第４実施形態のダンパチューブの下端部
を示す拡大図である。FIG. 7 is an enlarged view showing a lower end portion of a damper tube according to a fourth embodiment.
【図８】図８は第５実施形態のダンパチューブの下端部
を示す拡大図である。FIG. 8 is an enlarged view showing a lower end portion of a damper tube according to a fifth embodiment.
【図９】図９はダンパチューブの変形例を示す横断面図
である。FIG. 9 is a cross-sectional view showing a modified example of the damper tube.
１０ 油圧緩衝器 １２ 外筒 １３ 内筒 １４ リブ ４０Ａ 油室 ５１ リザーバ室 ５２ キャップ ５３ ボトムピース ８２ 加締部 ９１、９１Ａ 固定部材 ９２ ナックルブラケット DESCRIPTION OF SYMBOLS 10 Hydraulic shock absorber 12 Outer cylinder 13 Inner cylinder 14 Rib 40A Oil chamber 51 Reservoir chamber 52 Cap 53 Bottom piece 82 Caulking part 91, 91A Fixing member 92 Knuckle bracket
Claims (5)
壁を一体に結合し、内筒の内部の油室と、内筒と外筒の
間のリザーバ室とを仕切るボトムピースを内筒の下端部
と外筒の下端部の間に固定してなる油圧緩衝器のボトム
固定構造において、 ボトムピースを内筒に嵌合し、ボトムピースをキャップ
により保持するとともに、キャップを外筒の端部に加締
め、ネジ結合又は圧入により固定することを特徴とする
油圧緩衝器のボトム固定構造。1. A bottom piece that integrally connects an outer peripheral wall of an inner cylinder to an inner peripheral wall of an outer cylinder by a rib and separates an oil chamber inside the inner cylinder from a reservoir chamber between the inner cylinder and the outer cylinder. In the bottom fixing structure of the hydraulic shock absorber fixed between the lower end of the cylinder and the lower end of the outer cylinder, the bottom piece is fitted to the inner cylinder, the bottom piece is held by the cap, and the cap is fixed to the outer cylinder. A bottom fixing structure for a hydraulic shock absorber, wherein the hydraulic shock absorber is fixed by crimping to an end and screwing or press-fitting.
なる請求項１記載の油圧緩衝器のボトム固定構造。2. A bottom fixing structure for a hydraulic shock absorber according to claim 1, wherein said bottom piece is connected to a cap.
壁を一体に結合し、内筒の内部の油室と、内筒と外筒の
間のリザーバ室とを仕切るボトムピースを内筒の下端部
と外筒の下端部の間に固定してなる油圧緩衝器のボトム
固定構造において、 ボトムピースを内筒に嵌合し、ボトムピースをキャップ
により保持するとともに、キャップを外筒の端部に嵌合
し、キャップを保持する固定部材を外筒の端部に加締
め、ネジ結合又は圧入により固定することを特徴とする
油圧緩衝器のボトム固定構造。3. A bottom piece that integrally connects an outer peripheral wall of an inner cylinder to an inner peripheral wall of the outer cylinder by a rib to partition an oil chamber inside the inner cylinder and a reservoir chamber between the inner cylinder and the outer cylinder. In the bottom fixing structure of the hydraulic shock absorber fixed between the lower end of the cylinder and the lower end of the outer cylinder, the bottom piece is fitted to the inner cylinder, the bottom piece is held by the cap, and the cap is fixed to the outer cylinder. A bottom fixing structure for a hydraulic shock absorber, wherein a fixing member fitted to an end and holding a cap is crimped to an end of an outer cylinder and fixed by screw connection or press fitting.
る請求項３記載の油圧緩衝器のボトム固定構造。4. The bottom fixing structure according to claim 3, wherein the fixing member is a knuckle bracket.
壁を一体に結合し、内筒の内部の油室と、内筒と外筒の
間のリザーバ室とを仕切るボトムピースを内筒の下端部
と外筒の下端部の間に固定してなる油圧緩衝器のボトム
固定構造において、 キャップを一端部に固定した外筒の他端部からボトムピ
ースを挿入し、該ボトムピースを内筒に嵌合し、該ボト
ムピースをキャップに結合することを特徴とする油圧緩
衝器のボトム固定構造。5. A bottom piece which integrally connects an outer peripheral wall of an inner cylinder to an inner peripheral wall of an outer cylinder by a rib and partitions an oil chamber inside the inner cylinder and a reservoir chamber between the inner cylinder and the outer cylinder. In the bottom fixing structure of the hydraulic shock absorber fixed between the lower end of the cylinder and the lower end of the outer cylinder, a bottom piece is inserted from the other end of the outer cylinder having the cap fixed to one end, and the bottom piece is A bottom fixing structure for a hydraulic shock absorber, wherein the bottom piece is fitted to an inner cylinder and the bottom piece is connected to a cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000248967A JP4520597B2 (en) | 2000-08-18 | 2000-08-18 | Bottom structure of hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000248967A JP4520597B2 (en) | 2000-08-18 | 2000-08-18 | Bottom structure of hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002061696A true JP2002061696A (en) | 2002-02-28 |
| JP4520597B2 JP4520597B2 (en) | 2010-08-04 |
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ID=18738774
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000248967A Expired - Fee Related JP4520597B2 (en) | 2000-08-18 | 2000-08-18 | Bottom structure of hydraulic shock absorber |
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| JP (1) | JP4520597B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007187237A (en) * | 2006-01-13 | 2007-07-26 | Kayaba Ind Co Ltd | Strut type shock absorber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190063541A1 (en) * | 2017-08-25 | 2019-02-28 | Thyssenkrupp Bilstein Gmbh | Oscillation damper, a damper inner pipe, a damper outer pipe and a method for producing a double pipe of an oscillation damper |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591949U (en) * | 1982-06-28 | 1984-01-07 | トヨタ自動車株式会社 | Temperature compensated fluid type shock absorber |
| JPS60189635U (en) * | 1984-05-28 | 1985-12-16 | カヤバ工業株式会社 | Shock absorber loosening prevention structure |
| JPS6187242U (en) * | 1984-11-13 | 1986-06-07 | ||
| JPS61119640U (en) * | 1985-01-14 | 1986-07-28 | ||
| JPH0247443U (en) * | 1988-09-29 | 1990-03-30 | ||
| JPH0253540U (en) * | 1988-10-12 | 1990-04-18 | ||
| JPH11182610A (en) * | 1997-12-24 | 1999-07-06 | Unisia Jecs Corp | Multiple-cylinder type shock absorber for strut type suspension |
-
2000
- 2000-08-18 JP JP2000248967A patent/JP4520597B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591949U (en) * | 1982-06-28 | 1984-01-07 | トヨタ自動車株式会社 | Temperature compensated fluid type shock absorber |
| JPS60189635U (en) * | 1984-05-28 | 1985-12-16 | カヤバ工業株式会社 | Shock absorber loosening prevention structure |
| JPS6187242U (en) * | 1984-11-13 | 1986-06-07 | ||
| JPS61119640U (en) * | 1985-01-14 | 1986-07-28 | ||
| JPH0247443U (en) * | 1988-09-29 | 1990-03-30 | ||
| JPH0253540U (en) * | 1988-10-12 | 1990-04-18 | ||
| JPH11182610A (en) * | 1997-12-24 | 1999-07-06 | Unisia Jecs Corp | Multiple-cylinder type shock absorber for strut type suspension |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007187237A (en) * | 2006-01-13 | 2007-07-26 | Kayaba Ind Co Ltd | Strut type shock absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4520597B2 (en) | 2010-08-04 |
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