JPH0229901B2 - - Google Patents
Info
- Publication number
- JPH0229901B2 JPH0229901B2 JP56174739A JP17473981A JPH0229901B2 JP H0229901 B2 JPH0229901 B2 JP H0229901B2 JP 56174739 A JP56174739 A JP 56174739A JP 17473981 A JP17473981 A JP 17473981A JP H0229901 B2 JPH0229901 B2 JP H0229901B2
- Authority
- JP
- Japan
- Prior art keywords
- damper
- damper weight
- weight
- elastic body
- hub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
- F16F15/1414—Masses driven by elastic elements
- F16F15/1435—Elastomeric springs, i.e. made of plastic or rubber
- F16F15/1442—Elastomeric springs, i.e. made of plastic or rubber with a single mass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/124—Elastomeric springs
- F16F15/126—Elastomeric springs consisting of at least one annular element surrounding the axis of rotation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は動力を伝達する回転軸のダンパ装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a damper device for a rotating shaft that transmits power.
（従来技術）
動力を伝達する回転軸の一つとしてクランク軸
があるが、該クランク軸はその回転に伴なつて所
謂ねじり振動を発生することが知られている。(Prior Art) A crankshaft is one of the rotating shafts that transmits power, and it is known that the crankshaft generates so-called torsional vibration as it rotates.
従つて、前記振動を防止すべく従来クランク軸
にはダンパ装置が設けられている。 Therefore, a damper device is conventionally provided on the crankshaft in order to prevent the vibration.
このダンパ装置はクランク軸の端部に筒状のハ
ブを該軸と一体に回転するよう取付け、そのハブ
外周に、クランク軸の低速回転時の振動を消去す
るダンパウエイトと、高速回転時の振動を消去す
るダンパウエイトとを夫々弾性体を介して軸線方
向に間隔をおいて嵌着した構造となつている。 This damper device has a cylindrical hub attached to the end of the crankshaft so that it rotates together with the shaft, and a damper weight on the outer periphery of the hub that eliminates vibrations when the crankshaft rotates at low speeds, and a damper weight that eliminates vibrations when the crankshaft rotates at high speeds. Damper weights for eliminating the noise are fitted through elastic bodies at intervals in the axial direction.
ところが、斯る構造では２つのダンパウエイト
の嵌合長を確保するためにハブが軸線方向に長く
なつてダンパ装置が大型化し、内燃機関の小型化
を計る上で障害となつていた。 However, in such a structure, the hub becomes longer in the axial direction in order to ensure the fitting length of the two damper weights, resulting in an increase in the size of the damper device, which has been an obstacle to miniaturizing the internal combustion engine.
（発明が解決しようとする課題）
本発明は叙上事情に鑑みてなされたもので、２
つのダンパウエイトをハブの外周と内周に設ける
ことにより、ハブの軸線方向の長さを短縮してダ
ンパ装置の小型化とねじり振動の防止効果の向上
を計ることを課題とする。(Problem to be solved by the invention) The present invention has been made in view of the above circumstances, and
The object of the present invention is to shorten the axial length of the hub by providing two damper weights on the outer and inner peripheries of the hub, thereby reducing the size of the damper device and improving the effect of preventing torsional vibration.
（課題を解決する為の手段）
上記した課題を解決する為に、本発明の回転軸
のダンパ装置は、動力を伝達する回転軸におい
て、その端部に該軸と一体に回転するよう筒状の
ハブを取付け、該ハブの外周に弾性体を介して第
１のダンパウエイトを嵌着し、同じくハブの内周
に弾性体を介して第２のダンパウエイトを嵌着
し、この第２のダンパウエイトの軸方向に長さを
弾性体のそれよりも長くしたものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the rotary shaft damper device of the present invention has a cylindrical shape at the end of the rotary shaft that transmits power so as to rotate integrally with the shaft. A first damper weight is fitted to the outer periphery of the hub via an elastic body, and a second damper weight is similarly fitted to the inner periphery of the hub via an elastic body. The length of the damper weight in the axial direction is longer than that of the elastic body.
上記第２のダンパウエイトは弾性体との接合面
から外れた部分の肉厚を、上記接合面より外径側
に増大させると効果的である。 It is effective to increase the thickness of the second damper weight at a portion away from the joint surface with the elastic body toward the outer diameter side of the joint surface.
また、第１ダンパウエイトは、その外周部に補
機類駆動用ベルトのベルト掛け部を有したものを
採用してもよい。 Further, the first damper weight may have a belt hanging portion for an auxiliary machinery driving belt on its outer circumferential portion.
（実施例）
本発明実施の一例をクランク軸のダンパ装置に
ついて図面により説明すると、図中１はクランク
軸、２はハブである。(Example) An example of the present invention will be described with reference to the drawings regarding a damper device for a crankshaft. In the drawings, 1 is a crankshaft, and 2 is a hub.
上記ハブ２は段付の筒状に形成され、その小径
部即ちボス部２ａがクランク軸１の端部にキー３
を介して該軸１と一体に回転するよう取付けら
れ、大径部２ｂがクランク軸１側方へ突出されて
いる。 The hub 2 is formed into a stepped cylindrical shape, and its small diameter portion, that is, the boss portion 2a is attached to the end of the crankshaft 1 with a key 3.
It is attached to rotate together with the crankshaft 1 via the crankshaft 1, and the large diameter portion 2b projects to the side of the crankshaft 1.
そして、このハブ２の外周に第１のダンパウエ
イト４が設けられ、内周に第２のダンパウエイト
５が設けられる。 A first damper weight 4 is provided on the outer periphery of the hub 2, and a second damper weight 5 is provided on the inner periphery.
前記第１のダンパウエイト４はクランク軸１の
高速回転時における振動を消去するためのもの
で、ハブ２の大径部２ｂの外径よりも大径な筒状
に形成されている。 The first damper weight 4 is used to eliminate vibrations when the crankshaft 1 rotates at high speed, and is formed into a cylindrical shape having a diameter larger than the outer diameter of the large diameter portion 2b of the hub 2.
６は前記ダンパウエイト４の内周に焼付けられ
たゴム材等からなる弾性体であり、この弾性体６
を介してダンパウエイト４がハブ２の大径部２ｂ
外周に嵌着されるようになつている。 Reference numeral 6 denotes an elastic body made of a rubber material etc. baked onto the inner periphery of the damper weight 4, and this elastic body 6
The damper weight 4 is connected to the large diameter portion 2b of the hub 2 via
It is designed to be fitted around the outer periphery.
従つて、上記ハブ２外周に嵌着されたダンパウ
エイト４はその回転に伴なつて比較的大きな慣性
モーメントを発生し、クランク軸１の高速回転時
における振動を有効に消去する。 Therefore, the damper weight 4 fitted around the outer periphery of the hub 2 generates a relatively large moment of inertia as it rotates, effectively eliminating vibrations when the crankshaft 1 rotates at high speed.
上記ダンパウエイト４は内燃機関における補器
類を駆動させる駆動用プーリとして共用されるよ
うなつており、この外周に２つのベルト掛け部４
ａが形成されている。 The damper weight 4 is commonly used as a drive pulley for driving auxiliary equipment in an internal combustion engine, and has two belt hooks 4 on its outer periphery.
a is formed.
７は前記各ベルト掛け部４ａに並列的に複数形
成された凹条であり、この凹条７にベルト８内周
に突設された突条が嵌め合うことによりベルト８
が滑り止めされている。 Reference numeral 7 denotes a plurality of grooves formed in parallel on each of the belt hanging portions 4a, and a protrusion provided on the inner periphery of the belt 8 is fitted into the groove 7, so that the belt 8
is non-slip.
一方、上記第２のダンパウエイト５はクランク
軸１の低速回転時における振動を消去するための
もので、ハブ２の大径部２ｂの内径よりも小径な
筒状に形成されている。 On the other hand, the second damper weight 5 is used to eliminate vibrations when the crankshaft 1 rotates at low speed, and is formed into a cylindrical shape having a smaller diameter than the inner diameter of the large diameter portion 2b of the hub 2.
このため、ダンパウエイト５は慣性モーメント
が不足しがちであるが、この慣性モーメントの不
足は該ウエイト５を比重の大きな材料で厚肉に形
成することによつて補われている。 For this reason, the damper weight 5 tends to lack a moment of inertia, but this lack of moment of inertia is compensated for by forming the weight 5 thickly from a material with a large specific gravity.
９は前記ダンパウエイト５の外周に焼付けられ
たゴム材等からなる弾性体であり、この弾性体９
を介してダンパウエイト５がハブ２の大径部２ｂ
内周に嵌着されるようになつている。 Reference numeral 9 denotes an elastic body made of a rubber material etc. baked onto the outer periphery of the damper weight 5;
The damper weight 5 is connected to the large diameter portion 2b of the hub 2 via the
It is designed to be fitted on the inner periphery.
従つて、上記ハブ２内周に嵌着されたダンパウ
エイト５はその回転に伴つて発生する慣性モーメ
ントにより、クランク軸１の低速回転時における
振動を有効に消去する。 Therefore, the damper weight 5 fitted to the inner periphery of the hub 2 effectively eliminates vibrations when the crankshaft 1 rotates at a low speed due to the moment of inertia generated as the damper weight 5 rotates.
また、上記第２のダンパウエイト５は、その軸
方向の長さを弾性体９の軸方向の長さよりも長く
形成することによつて、ダンパウエイト５の効果
を高めている。 Further, the second damper weight 5 has an axial length longer than the axial length of the elastic body 9, thereby enhancing the effect of the damper weight 5.
ダンパウエイト５の効果は上記した様に肉厚を
増やすことによつても向上させることができる
が、径方向に増肉するよりも軸方向へ容積を増大
させて回転の慣性モーメントの大きなところで質
量を確保した方がより効果的である。 The effect of the damper weight 5 can be improved by increasing the wall thickness as described above, but rather than increasing the wall thickness in the radial direction, increasing the volume in the axial direction increases the mass in areas where the moment of rotational inertia is large. It is more effective to ensure that
さらに、第２のダンパウエイト５は弾性体９と
の接合面から外れて側方へ突出する部分の肉厚を
上記接合面より外径側に増大させてあり、上記し
たものと同じ理由でダンパウエイト５の効果をよ
り大きくすることができる。 Furthermore, the thickness of the second damper weight 5 is increased at the portion that protrudes laterally away from the joint surface with the elastic body 9, and the thickness of the second damper weight 5 is increased toward the outer diameter side from the joint surface. The effect of weight 5 can be further increased.
（発明の効果）
本発明は叙上の如く第１及び第２の２つのダン
パウエイトをハブの外周と内周に夫々弾性体を介
して嵌着したので、ハブにおけるダンパウエイト
の嵌合長即ち軸線方向の長さを短縮させて、ダン
パ装置の小型化を計ることができ、さらに、第２
ダンパウエイトの軸方向の長さを弾性体のそれよ
りも長くすることによつて、第２ダンパウエイト
の容積を軸方向へ増大せしめ、該ダンパウエイト
におけるねじり振動の防止効果をダンパウエイト
の肉厚を増す手段よりも効率的に増大することが
できる。(Effects of the Invention) As described above, in the present invention, the first and second damper weights are fitted to the outer circumference and inner circumference of the hub, respectively, via elastic bodies, so that the fitting length of the damper weights on the hub, i.e. By shortening the length in the axial direction, the damper device can be made smaller.
By making the axial length of the damper weight longer than that of the elastic body, the volume of the second damper weight is increased in the axial direction, and the effect of preventing torsional vibration in the damper weight is reduced by increasing the wall thickness of the damper weight. can be increased more efficiently than by means of increasing.
また、上記した第２のダンパウエイトにおける
弾性体との接合面から外れた部分の肉厚を、上記
接合面より外径側に増大させることによれば、同
ダンパウエイトの質量を回転の慣性モーメントの
大きなところで確保することができ、これによつ
て第２ダンパウエイトにおけるねじり振動の防止
効果をより効率的に増大させることが可能であ
る。 Furthermore, by increasing the thickness of the portion of the second damper weight that is away from the joint surface with the elastic body toward the outer diameter side from the joint surface, the mass of the damper weight can be reduced by the rotational moment of inertia. This makes it possible to more efficiently increase the effect of preventing torsional vibration in the second damper weight.
さらに、第１ダンパウエイトの外周に補機類駆
動用ベルトのベルト掛け部を有するものは、請求
項１のダンパ装置と同様にダンパ装置の小型化を
計ると共に、第１のダンパウエイトをプーリとし
て共用し、駆動用ベルトを介して補機類を駆動さ
せることができる利点がある。 Further, in the case where the first damper weight has a belt hanging part for the auxiliary drive belt on the outer periphery, the damper apparatus can be miniaturized similarly to the damper apparatus of claim 1, and the first damper weight can be used as a pulley. It has the advantage that it can be shared, and auxiliary machinery can be driven via the drive belt.
図面は本発明ダンパ装置を示す断面図である。
尚図中
１……クランク軸（回転軸）、２……ハブ、４
……第１のダンパウエイト、４ａ……ベルト掛け
部、５……第２のダンパウエイト、６，９……弾
性体。
The drawing is a sectional view showing the damper device of the present invention.
In the diagram: 1...Crankshaft (rotating shaft), 2...Hub, 4
...First damper weight, 4a... Belt hanging portion, 5... Second damper weight, 6, 9... Elastic body.
Claims (1)
該軸と一体に回転するよう筒状のハブを取付け、
該ハブの外周に弾性体を介して第１のダンパウエ
イトを嵌着し、同じくハブの内周に弾性体を介し
て第２のダンパウエイトを嵌着し、この第２のダ
ンパウエイトの軸方向の長さを弾性体のそれより
も長くした回転軸のダンパ装置。 ２ 第２のダンパウエイトにおける弾性体との接
合面から外れた部分の肉厚を、上記接合面より外
径側に増大させた請求項１記載の回転軸のダンパ
装置。 ３ 第１ダンパウエイトがその外周部に補機類駆
動用ベルトのベルト掛け部を有した請求項１記載
の回転軸のダンパ装置。[Scope of Claims] 1. A cylindrical hub is attached to the end of a rotating shaft that transmits power so as to rotate together with the shaft,
A first damper weight is fitted to the outer periphery of the hub via an elastic body, and a second damper weight is similarly fitted to the inner periphery of the hub via the elastic body, and the axial direction of the second damper weight is A rotary shaft damper device whose length is longer than that of the elastic body. 2. The rotary shaft damper device according to claim 1, wherein the thickness of the portion of the second damper weight that is outside the joint surface with the elastic body is increased toward the outer diameter side of the joint surface. 3. The damper device for a rotary shaft according to claim 1, wherein the first damper weight has a belt hanging portion for a belt for driving auxiliary machinery on its outer peripheral portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17473981A JPS5877946A (en) | 1981-10-31 | 1981-10-31 | Damper for rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17473981A JPS5877946A (en) | 1981-10-31 | 1981-10-31 | Damper for rotating shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5877946A JPS5877946A (en) | 1983-05-11 |
| JPH0229901B2 true JPH0229901B2 (en) | 1990-07-03 |
Family
ID=15983820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17473981A Granted JPS5877946A (en) | 1981-10-31 | 1981-10-31 | Damper for rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5877946A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61211552A (en) * | 1985-03-13 | 1986-09-19 | Toyota Motor Corp | Crank damper pulley structure for vehicle |
| US4794816A (en) * | 1985-10-15 | 1989-01-03 | Tokai Rubber Industries, Ltd. | Dual-type damper device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126045U (en) * | 1979-02-28 | 1980-09-06 |
-
1981
- 1981-10-31 JP JP17473981A patent/JPS5877946A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5877946A (en) | 1983-05-11 |
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