JP2000002278A - Cylindrical vibration isolation device - Google Patents
Cylindrical vibration isolation deviceInfo
- Publication number
- JP2000002278A JP2000002278A JP16791098A JP16791098A JP2000002278A JP 2000002278 A JP2000002278 A JP 2000002278A JP 16791098 A JP16791098 A JP 16791098A JP 16791098 A JP16791098 A JP 16791098A JP 2000002278 A JP2000002278 A JP 2000002278A
- Authority
- JP
- Japan
- Prior art keywords
- elastic body
- cylindrical
- cylindrical metal
- rubber elastic
- fitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Springs (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、車両等に用いられ
る筒型防振装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular vibration isolator used for a vehicle or the like.
【0002】[0002]
【従来の技術】従来、この種の筒型防振装置は、例えば
図3に示すように、円筒形の本体部2の一端側に同軸的
に拡径された拡径部3を設けると共に拡径部3に続いて
円錐状に縮径されて本体部2に続く傾斜部4を設けた内
筒金具1と、内筒金具1の外周側に同軸的に配置され、
内筒金具1より軸方向長さが短くかつ拡径部3側の端部
が傾斜部4内に位置する円筒形の外筒金具5と、内筒金
具1及び外筒金具5間に加硫成形されて両者間を連結す
る軸方向両端が略対称の筒状のゴム弾性体6とを備えて
いる。さらに、この筒型防振装置は、ゴム弾性体6の加
硫成形後に、そのばね特性の安定化のために、外筒金具
5に絞り加工が施され、そのためゴム弾性体6の軸方向
端部が、図3に示す位置より外側に膨出することにな
る。この筒型防振装置は、図4に示すように、内筒金具
1が車輪を固定するアクスル7から突出した片持支持部
7aの外周に挿着固定され、外筒金具5はショックアブ
ソーバ8のカラー部8aに挿着固定され、車輪からの振
動を減衰させてショックアブソーブ8に伝達するように
なっている。2. Description of the Related Art Conventionally, as shown in FIG. 3, for example, as shown in FIG. 3, a cylindrical vibration isolator is provided with an enlarged diameter portion 3 coaxially enlarged at one end of a cylindrical main body portion 2. An inner cylindrical metal fitting 1 having a conical reduced diameter following the diameter part 3 and provided with an inclined part 4 following the main body part 2, coaxially disposed on the outer peripheral side of the inner cylindrical metal fitting 1,
Vulcanization between the cylindrical outer tube 5 and the cylindrical outer tube 5 whose axial length is shorter than the inner tube 1 and whose end on the enlarged diameter portion 3 side is located in the inclined portion 4. It has a cylindrical rubber elastic body 6 which is formed and is substantially symmetrical at both axial ends for connecting the both. Further, in this cylindrical vibration isolator, after the rubber elastic body 6 is vulcanized, the outer cylindrical metal fitting 5 is subjected to drawing in order to stabilize its spring characteristics. The portion will bulge outward from the position shown in FIG. In this cylindrical vibration isolator, as shown in FIG. 4, the inner cylindrical fitting 1 is inserted and fixed to the outer periphery of a cantilever support portion 7a protruding from an axle 7 for fixing wheels, and the outer cylindrical fitting 5 is connected to a shock absorber 8 Is inserted and fixed to the collar portion 8a, and the vibration from the wheels is attenuated and transmitted to the shock absorber 8.
【0003】[0003]
【発明が解決しようとする課題】ところで、上記筒型防
振装置は、車両に組み付けられる際は、内外筒金具1、
外筒金具5はこじれがなく同軸状態が確保されている
が、車両の運転時には、こじれ入力が発生して3〜5゜
の大きなこじれが生じると共に大荷重が加わる。この場
合、内筒金具1の本体部2他端側と外筒金具5の端部は
距離が離れておりゴム弾性体の圧縮率は厳しくないため
耐久性も問題はないが、内筒金具1の傾斜部4と外筒金
具5端部間は距離が接近しているため、図4に示すよう
に、その間のゴム弾性体6の圧縮率は高くなり、そのた
めに外筒金具5の端部がゴム弾性体端部の膨出部分6a
に食い込み、その部分から亀裂が成長することによりゴ
ム弾性体6が損傷を受けるおそれがあった。これに対
し、ゴム弾性体6のゴム量を減らすことが考えられる
が、しかし、この筒型防振装置は、大荷重にさらされて
耐久性が厳しい部品であるため、ゴム量を適正に維持す
る必要があり、ゴム量を減らすことは耐久性を損なうた
めに好ましくない。本発明は、上記した問題を解決しよ
うとするもので、内外筒金具の端部間でのゴム弾性体の
損傷を防止でき、かつ耐久性に優れた筒型防振装置を提
供することを目的とする。By the way, when the above cylindrical vibration isolator is mounted on a vehicle, the inner and outer cylindrical metal fittings 1 and 2 are used.
The outer tube fitting 5 is not twisted and is kept coaxial. However, when the vehicle is driven, a twist input is generated to generate a large 3-5 ° twist and a large load is applied. In this case, the other end of the main body 2 of the inner cylinder 1 and the end of the outer cylinder 5 are spaced apart from each other, and the compression ratio of the rubber elastic body is not strict. Since the distance between the inclined portion 4 and the end of the outer cylinder 5 is short, as shown in FIG. 4, the compression ratio of the rubber elastic body 6 therebetween is high, so that the end of the outer cylinder 5 is increased. Is the bulging portion 6a at the end of the rubber elastic body.
And the rubber elastic body 6 may be damaged by cracks growing from the portion. On the other hand, it is conceivable to reduce the amount of rubber in the rubber elastic body 6. However, since this cylindrical vibration isolator is a component that is exposed to a large load and has severe durability, the rubber amount is appropriately maintained. It is not preferable to reduce the amount of rubber because the durability is impaired. An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a cylindrical vibration damping device that can prevent damage to a rubber elastic body between ends of inner and outer cylindrical fittings and has excellent durability. And
【0004】[0004]
【課題を解決するための手段及び発明の効果】上記目的
を達成するために、上記請求項1に係る発明の構成上の
特徴は、筒状の本体部の一端側にて同軸的に拡径された
拡径部を設けると共に拡径部の内側端から円錐状に縮径
されて本体部に続く傾斜部を一体的に設け、車両に設け
た片持支持部の外周に挿着固定される内筒金具と、内筒
金具の外周側に同軸的に配置されると共に、内筒金具よ
り軸方向長さが短くされて、車両に設けた相手部材に取
り付けられる筒状の外筒金具と、内筒金具及び外筒金具
間に加硫成形されて両者間を連結する筒状のゴム弾性体
とを備え、外筒金具に絞り加工が施されてなる筒型防振
装置において、外筒金具の絞り加工前に、ゴム弾性体の
拡径部側の端部に、周方向に沿って切り欠かれて軸方向
断面形状が略矩形状に形成されると共にその軸方向端部
が、傾斜部の軸方向中心側の端部上にまたは端部から軸
方向中心側に離れて配置された環状のすぐり部を設ける
と共に、ゴム弾性体の軸方向反対側端部のゴム量を増加
させたことにある。Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the structural feature of the invention according to the first aspect is that the diameter of the cylindrical body is increased coaxially at one end side. And an inclined portion that is conically reduced in diameter from the inner end of the enlarged diameter portion and is integrally provided with the main body portion, and is inserted and fixed to the outer periphery of a cantilever support portion provided in the vehicle. An inner cylindrical metal fitting, a cylindrical outer cylindrical metal fitting that is coaxially arranged on the outer peripheral side of the inner cylindrical metal fitting, has a shorter axial length than the inner cylindrical metal fitting, and is attached to a mating member provided in the vehicle; A tubular rubber elastic body which is vulcanized and formed between the inner tubular fitting and the outer tubular fitting and connects the two, and wherein the outer tubular fitting is subjected to drawing processing, wherein the outer tubular fitting is Before drawing, the end of the rubber elastic body on the enlarged diameter side is cut out along the circumferential direction so that the axial cross-sectional shape is substantially rectangular. And an annular end portion provided on the end of the inclined portion on the axial center side or at a distance from the end to the axial center side, and a rubber elastic body. This is because the amount of rubber at the end opposite to the axial direction has been increased.
【0005】上記のように構成した請求項1に係る発明
においては、外筒金具の絞り加工前に、ゴム弾性体の拡
径部側の端部に軸方向断面形状が矩形状のすぐり部が設
けられているため、外筒金具の絞り加工により、ゴム弾
性体が軸方向外方に膨出しても、膨出部分が外筒金具の
端部より外方に突出することはない。そのため、車両の
運転時に、内外筒金具間にこじれ入力が加えられること
により、3〜5゜の大きなこじれが生じても、外筒金具
の端部が、拡径部側の端部に膨出したゴム弾性体に食い
込むことがなく、その結果、ゴム弾性体が損なわれるこ
とがない。また、すぐり部側でゴム量が少なくされてい
るが、軸方向反対側端部のゴム量が増加しているため、
ゴム弾性体全体で必要なゴム量が確保されている。その
結果、ゴム弾性体の耐久性が維持される。[0005] In the invention according to claim 1 configured as described above, before the drawing process of the outer cylindrical metal fitting, the end portion of the rubber elastic body on the side of the enlarged diameter portion is provided with a straight portion having a rectangular cross section in the axial direction. Even if the rubber elastic body is swelled outward in the axial direction by the drawing process of the outer cylinder, the swelling portion does not protrude outward from the end of the outer cylinder. Therefore, even if a large twist of 3 to 5 mm occurs due to a twist input between the inner and outer cylinders during the operation of the vehicle, the end of the outer cylinder is bulged to the end on the enlarged diameter side. The rubber elastic body does not bite into the rubber elastic body, and as a result, the rubber elastic body is not damaged. In addition, although the amount of rubber is reduced on the side of the bulge, the amount of rubber on the opposite end in the axial direction is increased,
A necessary rubber amount is secured in the entire rubber elastic body. As a result, the durability of the rubber elastic body is maintained.
【0006】[0006]
【発明の実施の形態】以下、本発明の一実施形態を図面
を用いて説明すると、図1は、同実施形態である自動車
の車輪を固定するアクルスとショックアブソーバ間に取
り付けられる筒型防振装置を外筒金具の絞り加工前の状
態で断面図により示したものである。筒型防振装置は、
内筒金具10と、内筒金具10の外周側に同軸的に配設
された外筒金具20と、内筒金具10と外筒金具20の
間に加硫成形により設けられて両金具を連結する略円筒
状のゴム弾性体30とを設けている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cylindrical vibration isolator mounted between an acruz for fixing a vehicle wheel and a shock absorber according to the embodiment. FIG. 2 is a cross-sectional view of the device in a state before drawing of an outer cylinder. The cylindrical vibration isolator
An inner cylinder fitting 10, an outer cylinder fitting 20 coaxially arranged on the outer peripheral side of the inner cylinder fitting 10, and provided by vulcanization molding between the inner cylinder fitting 10 and the outer cylinder fitting 20 to connect the two fittings. And a substantially cylindrical rubber elastic body 30.
【0007】内筒金具10は、金属パイプ製の本体部1
1を有し、その一端側(図示左端)の軸方向所定長さの
部分には、一端側から延びかつ同軸的に拡径された拡径
部12と、拡径部12に続いて軸方向に中央に向けて円
錐状に縮径されて本体部11に続く傾斜部13を設けて
いる。拡径部12と傾斜部13とは、本体部11に拡管
加工を施すことにより一体的に形成される。[0007] The inner tube fitting 10 includes a main body 1 made of a metal pipe.
In a portion of a predetermined length in the axial direction at one end (left end in the drawing), an enlarged diameter portion 12 extending from the one end and coaxially enlarged, and an axial direction following the enlarged diameter portion 12 are provided. An inclined portion 13 which is conically reduced in diameter toward the center and continues to the main body portion 11 is provided. The enlarged diameter portion 12 and the inclined portion 13 are integrally formed by subjecting the main body portion 11 to a pipe expansion process.
【0008】外筒金具20は、薄肉円筒形の金具であ
り、軸方向長さが内筒金具10より小さくなっており、
内筒金具10の外周側に同軸的かつ軸方向に中心を合わ
せて配置されている。このとき、外筒金具20の一端側
は、内筒金具10の傾斜部13の間に位置している。The outer cylinder fitting 20 is a thin cylindrical metal fitting, and has an axial length smaller than that of the inner cylinder fitting 10.
It is arranged coaxially and axially centered on the outer peripheral side of the inner cylinder fitting 10. At this time, one end side of the outer cylinder 20 is located between the inclined portions 13 of the inner cylinder 10.
【0009】ゴム弾性体30は、軸方向の一端側に、周
方向沿って切り欠かれて軸方向にへこんで、軸方向断面
形状が略矩形状に形成された環状のすぐり部31を設け
ている。すぐり部31は、内筒金具10の拡径部12と
傾斜部13の境界から軸方向中央側に向けて傾斜部13
の端部からわずかに本体部11側寄り位置まで延びた水
平部31aと、水平部31a内端から軸直角方向に延び
た垂直部31bによって形成されている。垂直部31b
と水平部31aの境界及び垂直部31bと外筒金具20
の内周面との境界はR形状にされている。The rubber elastic body 30 is provided at one axial end thereof with an annular curving portion 31 which is cut out along the circumferential direction and dented in the axial direction, and has a substantially rectangular cross section in the axial direction. I have. The straightening portion 31 is formed by a slanted portion 13 extending from the boundary between the enlarged diameter portion 12 and the slanted portion 13 of the inner cylinder fitting 10 toward the center in the axial direction.
And a vertical portion 31b extending from the inner end of the horizontal portion 31a in a direction perpendicular to the axis. Vertical part 31b
And the boundary between the horizontal portion 31a and the vertical portion 31b and the outer tube fitting 20
Has an R-shaped boundary with the inner peripheral surface.
【0010】また、ゴム弾性体30の軸方向他端側は、
内筒金具10の他端近傍位置から外筒金具20の他端近
傍位置を連結しており、断面凹曲線形状になるようにわ
ずかにへこんだすぐり部32が形成されており、さらに
他端側は従来のものよりゴム量が増加されている。その
ため、ゴム弾性体30は、一端側がすぐり部31を設け
ることによりゴム量が減らされているが、その分他端側
のゴム量を増やすことにより、その耐久性に寄与するゴ
ム量を全体として減らさないように設計されている。The other end of the rubber elastic body 30 in the axial direction is
A position near the other end of the inner cylindrical member 10 is connected to a position near the other end of the outer cylindrical member 20, and a slightly dented portion 32 is formed so as to have a concave cross-sectional shape. Has a larger amount of rubber than conventional ones. Therefore, the rubber elastic body 30 has a reduced amount of rubber by providing the bulging portion 31 at one end, but by increasing the amount of rubber at the other end, the amount of rubber contributing to its durability is reduced as a whole. Designed not to reduce.
【0011】このように、外筒金具20の絞り加工前
に、ゴム弾性体30の一端側に軸方向断面形状が矩形状
のすぐり部31が設けられているため、ゴム弾性体30
の加硫成形後に外筒金具20に絞り加工を施したとき、
ゴム弾性体30の一端側が軸方向外方に膨出することに
なるが、図2に示すように、膨出部分30aが外筒金具
20の端部より外方に突出することはない。As described above, before the outer cylindrical metal member 20 is drawn, the rubber elastic body 30 is provided with the straight portion 31 having a rectangular cross-sectional shape at one end thereof.
When the outer cylinder 20 is drawn after vulcanization molding of
Although one end of the rubber elastic body 30 swells outward in the axial direction, the swelling portion 30a does not protrude outward from the end of the outer cylinder 20 as shown in FIG.
【0012】この筒型防振装置は、図2に示すように、
内筒金具10が、車両の車輪を固定するアクスル40か
ら突出した片持支持部41の外周に挿着され、先端の固
定部41aにスペーサ42を介してナット43を螺着さ
せることにより、片持支持部41に固定される。また、
外筒金具20は、ショックアブソーバ50のカラー部5
1に挿着固定される。[0012] As shown in FIG.
The inner cylinder fitting 10 is inserted around the outer periphery of a cantilever support portion 41 protruding from an axle 40 for fixing wheels of a vehicle, and a nut 43 is screwed into a fixing portion 41 a at a distal end via a spacer 42, so that the inner cylinder fitting 10 is screwed. It is fixed to the holding support portion 41. Also,
The outer tube fitting 20 is provided with the collar 5 of the shock absorber 50.
1 and fixed.
【0013】以上のように構成した実施形態において
は、ゴム弾性体30の拡径部12側の膨出部分30aが
外筒金具20の端部より外方に突出することはないた
め、車両の運転時に、内外筒金具10,20間にこじれ
入力及び大加重が加えられることにより、両金具間に3
〜5゜の大きなこじれが生じても、外筒金具20の端部
が、ゴム弾性体30の膨出部分30aに食い込むことが
なく、その結果、ゴム弾性体30が損傷を受けることが
ない。さらに、すぐり部31側でゴム量が少なくされて
いるが、軸方向反対側端部のゴム量が増加しているた
め、ゴム弾性体30全体で必要ゴム量が確保されてい
る。その結果、ゴム弾性体30の耐久性が維持される。In the embodiment configured as described above, the bulging portion 30a of the rubber elastic body 30 on the enlarged diameter portion 12 side does not protrude outward from the end of the outer cylindrical fitting 20, so that the vehicle is During operation, a twisting input and a large load are applied between the inner and outer cylindrical fittings 10 and 20 to thereby reduce the distance between the two fittings.
Even if a large twist of up to 5 ° occurs, the end of the outer cylindrical member 20 does not bite into the bulging portion 30a of the rubber elastic body 30, so that the rubber elastic body 30 is not damaged. Further, although the amount of rubber is reduced on the side of the bulging portion 31, the amount of rubber on the end portion on the opposite side in the axial direction is increased, so that the required amount of rubber is secured by the entire rubber elastic body 30. As a result, the durability of the rubber elastic body 30 is maintained.
【0014】なお、上記実施形態では、筒型防振装置を
車両の車輪を固定するアクスルとショックアブソーバ間
に取り付けた場合について説明しているが、これに限ら
ず、他の類似の用途にも使用することが可能である。In the above embodiment, the case where the cylindrical vibration isolator is mounted between the axle for fixing the wheels of the vehicle and the shock absorber is described. However, the present invention is not limited to this case, and may be applied to other similar uses. It is possible to use.
【図1】本発明の一実施形態である筒型防振装置を示す
断面図である。FIG. 1 is a cross-sectional view showing a cylindrical vibration isolator according to an embodiment of the present invention.
【図2】同筒型防振装置を車体に取り付けた状態を示す
部分断面図である。FIG. 2 is a partial cross-sectional view showing a state where the cylindrical vibration isolator is attached to a vehicle body.
【図3】従来例である筒型防振装置を示す断面図であ
る。FIG. 3 is a cross-sectional view showing a conventional cylindrical vibration isolator.
【図4】従来例である筒型防振装置を車体に取り付けた
状態を示す部分断面図である。FIG. 4 is a partial cross-sectional view showing a state where a conventional cylindrical vibration isolator is attached to a vehicle body.
10…内筒金具、11…本体部、12…拡径部、13…
傾斜部、20…外筒金具、30…ゴム弾性体、30a…
膨出部分、31…すぐり部、31a…水平部、31b…
垂直部、32…すぐり部、41…片持支持部、50…シ
ョックアブソーバ。Reference numeral 10: inner cylinder fitting, 11: body part, 12: enlarged diameter part, 13 ...
Inclined part, 20 ... outer cylinder fitting, 30 ... rubber elastic body, 30a ...
Swelling part, 31 ... Curved part, 31a ... Horizontal part, 31b ...
Vertical part, 32: Curving part, 41: Cantilever support part, 50: Shock absorber.
Claims (1)
された拡径部を設けると共に該拡径部の内側端から円錐
状に縮径されて該本体部に続く傾斜部を一体的に設け、
車両に設けた片持支持部の外周に挿着固定される内筒金
具と、 該内筒金具の外周側に同軸的に配置されると共に、該内
筒金具より軸方向長さが短くされて、車両に設けた相手
部材に取り付けられる筒状の外筒金具と、 前記内筒金具及び外筒金具間に加硫成形されて両者間を
連結する筒状のゴム弾性体とを備え、該外筒金具に絞り
加工が施されてなる筒型防振装置において、 該外筒金具の絞り加工前に、前記ゴム弾性体の前記拡径
部側の端部に、周方向に沿って切り欠かれて軸方向断面
形状が略矩形状に形成されると共にその軸方向端部が、
前記傾斜部の軸方向中心側の端部上にまたは該端部から
軸方向中心側に離れて配置された環状のすぐり部を設け
ると共に、該ゴム弾性体の軸方向反対側端部のゴム量を
増加させたことを特徴とする筒型防振装置。1. An enlarged diameter portion which is coaxially enlarged at one end side of a cylindrical main body portion, and which is conically reduced in diameter from an inner end of the enlarged diameter portion, and an inclined portion which follows the main body portion. Is provided integrally,
An inner cylinder fitting fixedly attached to the outer periphery of the cantilever support provided on the vehicle, and coaxially disposed on the outer periphery of the inner cylinder, and having an axial length shorter than that of the inner cylinder. A cylindrical outer cylindrical fitting attached to a mating member provided in a vehicle; and a cylindrical rubber elastic body formed by vulcanization between the inner cylindrical fitting and the outer cylindrical fitting and connecting the two. In a cylindrical vibration isolator in which a drawing process is applied to a tube fitting, before drawing the outer tube fitting, a cutout is formed along the circumferential direction at an end of the rubber elastic body on the side of the enlarged diameter portion. The axial cross-sectional shape is formed in a substantially rectangular shape, and the axial end is
An annular curving portion is provided on the axial center end of the inclined portion or separated from the end in the axial center direction, and the amount of rubber at the axially opposite end of the rubber elastic body is provided. A cylindrical vibration isolator characterized by increasing the number of vibrations.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16791098A JP2000002278A (en) | 1998-06-16 | 1998-06-16 | Cylindrical vibration isolation device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16791098A JP2000002278A (en) | 1998-06-16 | 1998-06-16 | Cylindrical vibration isolation device |
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Publication Number | Publication Date |
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JP2000002278A true JP2000002278A (en) | 2000-01-07 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP16791098A Pending JP2000002278A (en) | 1998-06-16 | 1998-06-16 | Cylindrical vibration isolation device |
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JP (1) | JP2000002278A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001317578A (en) * | 2000-05-09 | 2001-11-16 | Michelin Avs | Vibration control bush |
US6626020B2 (en) | 2000-12-25 | 2003-09-30 | Toyo Tire & Rubber Co., Ltd. | Method of producing vibration-isolating bushing |
-
1998
- 1998-06-16 JP JP16791098A patent/JP2000002278A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001317578A (en) * | 2000-05-09 | 2001-11-16 | Michelin Avs | Vibration control bush |
US6626020B2 (en) | 2000-12-25 | 2003-09-30 | Toyo Tire & Rubber Co., Ltd. | Method of producing vibration-isolating bushing |
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