【０００１】
【発明の属する技術分野】
本発明はダイナミックダンパに関する。
【０００２】
【従来の技術】
従来、自動車の車体等に取付けるダイナミックダンパは、［特許文献１］の図７に開示されているように、断面ほぼコ字形の支持ブラケットの互いに対向する一対の側壁の内面に、単一の質量体の一対の側壁をゴム状弾性体を介して各別に連結し、支持ブラケットの開放側の両折曲げ端部に一対のボルト挿通孔を各別に形成して構成してあった。
【０００３】
この構成によれば、一対のボルト挿通孔の間に質量体が介在しているために、質量体が邪魔になって両ボルト挿通孔の間隔を短くすることができず、ボルト挿通孔に対応する一対の雌ねじ部の間隔が長い取付け対象物にしか取付けることができなかった。
【０００４】
この問題を解消できる構造として、［特許文献２］の図３に開示されているように、前記支持ブラケットの底壁に一対の取付けボルトの頭部を溶接固着してあるダイナミックダンパがある。
【０００５】
【特許文献１】
特開２０００−２６６１１０号公報
【特許文献２】
特開平１０−６１７２０号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、［特許文献２］に記載の構成によれば、取付け対象物の被取付け部を挟んでダイナミックダンパとは反対側にスパナを回転操作するための広い空間が必要で、このような空間がない場合は取付けることができなかった。
【０００７】
本発明は上記実状に鑑みて成されたもので、その目的は、取付け対象物側の複数の被取付け部同士の間隔が短く、しかも取付け対象物の被取付け部側に広い作業スペースがなくても取付けることができるダイナミックダンパを提供する点にある。
【０００８】
【課題を解決するための手段】
請求項１による発明の構成は、一対の質量体を連結体を介して連結し、前記連結体に対する一対の支持壁の支持部を、両質量体の間に形成した空間に入り込ませるとともに、互いに反対側から前記連結体にそれぞれゴム状弾性体を介して連結し、取付け対象物に対する一対の取付け部を前記一対の支持壁に各別に設けてある点にある。
【０００９】
この構成によれば、連結体に対する一対の支持壁の支持部を、両質量体の間に形成した空間に入り込ませてあるから、一対の支持壁の支持部同士の間隔を短くすることができ、それに伴って、一対の支持壁に各別に設けた一対の取付け部の間隔も短くすることができる。
【００１０】
そして、例えば、連結体と交差する方向で連結体の両外方側に前記空間が形成されるように前記連結体を形成し、連結体の両外面に前記一対の支持壁の支持部をゴム状弾性体を介して各別に連結した構造では、取付け作業時に、両質量体の間に位置する支持壁の背面側の空間内に取付け工具を入り込ませて取付け操作することができる。
【００１１】
請求項２による発明の構成は、請求項１による発明の構成において、前記取付け部とは反対側の前記一対の支持壁の端部を前記連結体の外方側にそれぞれ延出させ、前記一対の支持壁の延出端部に、前記連結体に対する抜止め部材を架設してある点にある。
【００１２】
連結体に対する一対の支持壁の支持部を、両質量体の間に形成した空間に入り込ませてあり、しかも、一対の支持壁の前記延出端部に、連結体に対する抜止め部材を架設してあるから、連結体が支持壁から仮に分離したとしても、連結体や質量体を抜止め部材や支持壁の支持部で受け止めて、連結体及び質量体が、前記取付け部とは反対側の一対の支持壁の端部側から脱落したり、質量体が並ぶ方向に脱落したりするのを防止することができる。さらに、両支持壁の剛性を高くすることもできる。
【００１３】
請求項３による発明の構成は、請求項１又は２による発明の構成において、前記連結体を、背壁の外面同士が近接して対向する断面ほぼコの字形の一対の連結部材で形成し、一方の連結部材の第１側壁と、これに隣接する他方の連結部材の第１側壁とに一方の質量体を固着し、前記一方の連結部材の第２側壁と、これに隣接する他方の連結部材の第２側壁とに他方の質量体を固着し、前記背壁の内面に前記支持部に対する被支持部を設けてある点にある。
【００１４】
この構成によれば、一対の連結部材の背壁の外面同士が近接して対向しており、支持壁の支持部を、両質量体の間に形成した空間、すなわち、連結部材の両側壁の間に入り込ませるから、一対の支持壁の支持部同士の間隔を短くすることができ、それに伴って、一対の支持壁に各別に設けた一対の取付け部の間隔も短くすることができる。そして、取付け作業時には、連結部材の両側壁の間に位置する支持壁の背面側の空間内に取付け工具を入り込ませて取付け操作することができる。
【００１５】
また、各連結部材が断面ほぼコの字形になっており、一方の連結部材の第１側壁と、これに隣接する他方の連結部材の第１側壁とに一方の質量体を固着し、一方の連結部材の第２側壁と、これに隣接する他方の連結部材の第２側壁とに他方の質量体を固着してあるから、簡素でありながら強い構造に構成することができる。
【００１６】
請求項４による発明の構成は、請求項１，２，３のいずれか一つによる発明の構成において、ほぼＬ字形の板材で前記支持壁を形成し、一方の片に前記支持部を設けるとともに、他方の片に前記取付け部を設け、前記取付け部は前記他方の片にボルト挿通孔を形成して構成してある点にある。
【００１７】
この構成によれば、取付け部を取付け対象物にボルト固定することができる。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１に自動車のサイドメンバー（取付け対象物に相当）に取付けるダイナミックダンパを示してある。その構造について説明すると、金属製の一対の角板から成る互いに同一形状の一対の質量体１を連結体２を介して連結し、連結体２に対する一対の支持壁３の支持部４を、両質量体１の間に形成した空間Ｓに入り込ませるとともに、互いに反対側から連結体２にそれぞれゴム状弾性体５を介して連結し、サイドメンバーに対する一対の取付け部６を一対の支持壁３に各別に設けてある。この構成により、一対の質量体１を共振させてサイドメンバーの振動を抑制する。
【００１９】
詳しくは、連結体２を、背壁７の外面同士が近接して対向する断面ほぼコの字形の一対の連結部材８で形成し、一方の連結部材８の第１側壁９と、これに隣接する他方の連結部材８の第１側壁９とにそれらの外方側から一方の質量体１を溶接固着し、一方の連結部材８の第２側壁１０と、これに隣接する他方の連結部材８の第２側壁１０とにそれらの外方側から他方の質量体１を溶接固着し、背壁７の内面に支持部４に対する被支持部１１を設けてある。
【００２０】
質量体１は、連結部材８の第１及び第２側壁９，１０の外方側から見て、長辺が連結部材８の背壁７と平行な長方形状に形成してある。そして、その長手方向の両端部を連結部材８の両端部から大きくはみ出させてある。
【００２１】
支持壁３はほぼＬ字形の板材で形成してある。その一方の長い片に前記支持部４を設け、これと、連結部材８の背壁７の内面側の被支持部１１との間に前記ゴム状弾性体５を介在させてある。１２は断面がほぼコの字形のゴム部材である。また、他方の短い片にボルト挿通孔１４を形成して前記取付け部６を構成してある。一方の取付け部６側のボルト挿通孔１４は円形に形成し、他方の取付け部６側のボルト挿通孔１４は長孔に形成してある。
【００２２】
支持壁３の取付け部６側の端部を、質量体１の長手方向の一端部の外方側に延出させて、取付け部６を前記外方側に位置させ、支持壁３の取付け部６とは反対側の端部を連結部材８の外方側に延出させてある。そして、一対の支持壁３の延出端部に、一対の連結部材８に対する四角板状の抜止め部材１５を架け渡して溶接固着してある。抜止め部材１５は質量体１の長手方向の端部からはみだしてはいない。
【００２３】
上記構造のダイナミックダンパを、質量体１が上下に並ぶ横置き姿勢にしてサイドメンバーにその横内方側（車体の左右中心側）から取付ける。ちなみに、左右一対のサイドメンバーに上記構造の一対のダイナミックダンパを各別に取付ける。
【００２４】
［別実施形態］
（１）前記一対の連結部材８の背壁７同士の間隔を、上記の実施形態における間隔よりも広げるとともに、一対の支持壁３の支持部４を両背壁７の間に配置し、一方の支持壁３の支持部４と、これに対向する一方の連結部材８の背壁７の外面との間に前記ゴム状弾性体５を介在させ、他方の支持壁３の支持部４と、これに対向する他方の連結部材８の背壁７の外面との間にゴム状弾性体５を介在させてあってもよい（つまり、一対の支持壁３の支持部４を、一対の連結部材８から成る連結体２に互いに反対側からそれぞれゴム状弾性体５を介して連結する）。
【００２５】
さらに、この構造においても、支持壁３の取付け部６とは反対側の端部を連結部材８の外方側に延出させ、一対の支持壁３の延出端部に、一対の連結部材８に対する抜止め部材１５を架け渡して溶接固着してあってもよい。抜止め部材１５は、連結部材８を抜止めできるように両延出端部から張出す長さに設定する。また、その張出し部の遊端側を支持壁３の延出方向とは反対側に屈曲させれば、より抜け止めしやすくなる。
（２）前記連結体２を単一の部材で形成してあってもよい。この単一部材としては例えば断面がＨ字形の部材がある。
（３）前記一対の質量体１と連結体２とを鋳造等で一体に形成してあってもよい。
（４）前記一対の質量体１が横方向に並ぶ縦置き姿勢にして取付け対象物に取付けることもできる。
（５）取付け対象物はサイドメンバーに限られるものではない。また、自動車以外の装置類であってもよい。
【００２６】
【発明の効果】
請求項１の構成によれば、取付け対象物側の複数の被取付け部同士の間隔が短く、しかも取付け対象物の被取付け部側に広い作業スペースがなくても取付けることができるダイナミックダンパを提供することができた。
【００２７】
請求項２の構成によれば、請求項１の構成による効果と同様の効果を奏することができるのに加え、より耐久性を向上させることができ、しかも、抜止め部材が脱落防止部材と補強部材とを兼用しているから、構造を簡素化することができるとともに製作コストを低廉化できる。
【００２８】
請求項３の構成によれば、請求項１又は２の構成による効果と同様の効果を奏することができるのに加え、強い構造に構成することができて耐久性を向上させることができる。
【００２９】
請求項４の構成によれば、請求項１，２，３のいずれか一つの構成による効果と同様の効果を奏することができるのに加え、取付け対象物の被取付け部側に広い作業スペースがなくても取付け部を取付け対象物にボルト固定することができる。
【図面の簡単な説明】
【図１】ダイナミックダンパの平面図
【図２】ダイナミックダンパの正面図
【符号の説明】
１ 質量体
２ 連結体
３ 支持壁
４ 支持部
５ ゴム状弾性体
６ 取付け部
７ 連結部材の背壁
８ 連結部材
９ 第１側壁
１０ 第２側壁
１１ 被支持部
１４ ボルト挿通孔
１５ 抜止め部材
Ｓ 空間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dynamic damper.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as disclosed in FIG. 7 of [Patent Document 1], a dynamic damper mounted on an automobile body or the like has a single mass on a pair of opposed side walls of a support bracket having a substantially U-shaped cross section. A pair of side walls of the body are separately connected via a rubber-like elastic body, and a pair of bolt insertion holes are separately formed at both bent ends on the open side of the support bracket.
[0003]
According to this configuration, since the mass body is interposed between the pair of bolt insertion holes, the mass body obstructs the distance between the two bolt insertion holes. Can be attached only to an object to be attached where the distance between the pair of female screw portions is long.
[0004]
As a structure that can solve this problem, there is a dynamic damper in which the heads of a pair of mounting bolts are fixedly welded to the bottom wall of the support bracket as disclosed in FIG. 3 of [Patent Document 2].
[0005]
[Patent Document 1]
JP 2000-266110 A [Patent Document 2]
JP-A-10-61720
[Problems to be solved by the invention]
However, according to the configuration described in [Patent Document 2], a large space for rotating the spanner is required on the opposite side of the dynamic damper with the portion to be mounted of the mounting object interposed therebetween, and such a space is required. If not, it could not be installed.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the interval between a plurality of parts to be mounted on an object to be mounted and to provide a large work space on the part to be mounted on the object to be mounted. Another object of the present invention is to provide a dynamic damper that can be mounted.
[0008]
[Means for Solving the Problems]
In the configuration according to the first aspect of the present invention, the pair of mass bodies are connected via the connecting body, and the support portions of the pair of support walls with respect to the connecting body are inserted into the space formed between the two mass bodies, and The connecting member is connected to the connecting member from the opposite side via a rubber-like elastic body, and a pair of mounting portions for the mounting object are separately provided on the pair of support walls.
[0009]
According to this configuration, since the support portions of the pair of support walls with respect to the connector are inserted into the space formed between the two mass bodies, the distance between the support portions of the pair of support walls can be reduced. Accordingly, the distance between the pair of attachment portions separately provided on the pair of support walls can be shortened.
[0010]
Then, for example, the connecting body is formed so that the space is formed on both outer sides of the connecting body in a direction intersecting with the connecting body, and the support portions of the pair of support walls are rubberized on both outer surfaces of the connecting body. In the structure separately connected via the elastic members, the mounting operation can be performed by inserting the mounting tool into the space on the back side of the support wall positioned between the mass bodies during the mounting operation.
[0011]
According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, ends of the pair of support walls opposite to the mounting portion are respectively extended outward of the connecting body, and The present invention is characterized in that a retaining member for the connecting body is provided at the extending end of the supporting wall.
[0012]
The support portions of the pair of support walls for the connecting body are inserted into the space formed between the two mass bodies, and a retaining member for the connecting body is provided at the extending end of the pair of supporting walls. Therefore, even if the connecting body is temporarily separated from the support wall, the connecting body and the mass body are received by the retaining member and the support portion of the support wall, and the connecting body and the mass body are on the side opposite to the mounting portion. It is possible to prevent the pair of support walls from dropping off from the end portions and from dropping in the direction in which the mass bodies are arranged. Further, the rigidity of both support walls can be increased.
[0013]
According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, the connecting body is formed of a pair of substantially U-shaped connecting members whose outer surfaces of the back wall are close to each other and face each other. One mass body is fixed to the first side wall of one connecting member and the first side wall of the other connecting member adjacent thereto, and the second side wall of the one connecting member is connected to the other connecting side adjacent thereto. The other mass member is fixed to the second side wall of the member, and a supported portion for the support portion is provided on the inner surface of the back wall.
[0014]
According to this configuration, the outer surfaces of the back walls of the pair of connecting members are close to and opposed to each other, and the supporting portion of the supporting wall is formed in a space formed between the two mass bodies, that is, the side walls of the both side walls of the connecting member. The gap between the support portions of the pair of support walls can be shortened, and accordingly, the space between the pair of mounting portions provided separately on the pair of support walls can also be shortened. At the time of the mounting operation, the mounting operation can be performed by inserting the mounting tool into the space on the back side of the support wall located between the side walls of the connecting member.
[0015]
Also, each connecting member has a substantially U-shaped cross section, and one mass body is fixed to the first side wall of one connecting member and the first side wall of the other connecting member adjacent to the first side wall. Since the other mass body is fixed to the second side wall of the connecting member and the second side wall of the other connecting member adjacent thereto, a simple yet strong structure can be configured.
[0016]
According to a fourth aspect of the present invention, in the configuration of the first aspect of the present invention, the support wall is formed of a substantially L-shaped plate, and the support portion is provided on one of the pieces. The other part is provided with the mounting part, and the mounting part is formed by forming a bolt insertion hole in the other part.
[0017]
According to this configuration, the mounting portion can be bolted to the mounting target.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a dynamic damper attached to a side member (corresponding to an attachment object) of a vehicle. The structure will be described. A pair of masses 1 having the same shape and made of a pair of square plates made of metal are connected via a connecting body 2, and the supporting portions 4 of the pair of support walls 3 with respect to the connecting body 2 are connected to each other. It is inserted into the space S formed between the mass bodies 1 and connected to the connecting body 2 from opposite sides via rubber-like elastic bodies 5 respectively, and a pair of mounting portions 6 for the side members is formed on the pair of supporting walls 3. Each is provided separately. With this configuration, the pair of mass bodies 1 resonate to suppress the vibration of the side members.
[0019]
More specifically, the connecting body 2 is formed by a pair of connecting members 8 having a substantially U-shaped cross section in which the outer surfaces of the back wall 7 are close to and opposed to each other, and the first side wall 9 of one connecting member 8 is adjacent to the first side wall 9. One mass body 1 is fixedly welded to the first side wall 9 of the other connecting member 8 from the outer side thereof, and the second side wall 10 of one connecting member 8 and the other connecting member 8 adjacent thereto are welded. The other mass body 1 is welded and fixed to the second side wall 10 from the outer side thereof, and a supported portion 11 for the support portion 4 is provided on the inner surface of the back wall 7.
[0020]
The mass body 1 is formed in a rectangular shape whose long side is parallel to the back wall 7 of the connecting member 8 when viewed from the outside of the first and second side walls 9 and 10 of the connecting member 8. Then, both ends in the longitudinal direction are largely protruded from both ends of the connecting member 8.
[0021]
The support wall 3 is formed of a substantially L-shaped plate. The support portion 4 is provided on one of the long pieces, and the rubber-like elastic body 5 is interposed between the support portion 4 and the supported portion 11 on the inner surface side of the back wall 7 of the connecting member 8. Reference numeral 12 denotes a rubber member having a substantially U-shaped cross section. The other short piece is provided with a bolt insertion hole 14 to constitute the mounting portion 6. The bolt insertion hole 14 on the one attachment portion 6 side is formed in a circular shape, and the bolt insertion hole 14 on the other attachment portion 6 side is formed as a long hole.
[0022]
An end of the support wall 3 on the mounting portion 6 side is extended outward from one end portion of the mass body 1 in the longitudinal direction, and the mounting portion 6 is positioned on the outer side. The end opposite to 6 extends outward of the connecting member 8. A rectangular plate-like retaining member 15 for the pair of connecting members 8 is welded and fixed to the extended end portions of the pair of support walls 3. The retaining member 15 does not protrude from the longitudinal end of the mass body 1.
[0023]
The dynamic damper having the above-described structure is attached to the side member from the laterally inner side (the left and right center sides of the vehicle body) with the mass bodies 1 arranged in a horizontal position vertically. Incidentally, a pair of dynamic dampers having the above-described structure are separately attached to a pair of left and right side members.
[0024]
[Another embodiment]
(1) The distance between the back walls 7 of the pair of connecting members 8 is made wider than the distance in the above embodiment, and the support portions 4 of the pair of support walls 3 are arranged between the two back walls 7. The rubber-like elastic body 5 is interposed between the support portion 4 of the support wall 3 and the outer surface of the back wall 7 of one of the connecting members 8 opposed thereto, and the support portion 4 of the other support wall 3 A rubber-like elastic body 5 may be interposed between the opposite connecting member 8 and the outer surface of the back wall 7 of the other connecting member 8 (that is, the supporting portions 4 of the pair of supporting walls 3 are connected to the pair of connecting members 8). 8 are connected via rubber-like elastic members 5 from opposite sides to each other).
[0025]
Further, also in this structure, the end of the support wall 3 on the side opposite to the mounting portion 6 is extended outward of the connecting member 8, and the extended end of the pair of support walls 3 is connected to the pair of connecting members. The retaining member 15 with respect to 8 may be bridged and fixed by welding. The retaining member 15 is set to a length that protrudes from both extending ends so that the connecting member 8 can be retained. Further, if the free end side of the overhanging portion is bent in a direction opposite to the direction in which the support wall 3 extends, it becomes easier to prevent the protrusion from coming off.
(2) The connecting body 2 may be formed of a single member. As the single member, for example, there is a member having an H-shaped cross section.
(3) The pair of mass bodies 1 and the connecting body 2 may be integrally formed by casting or the like.
(4) The pair of mass bodies 1 can be attached to an object to be attached in a vertical position in which the mass bodies 1 are arranged in a horizontal direction.
(5) The mounting object is not limited to the side member. Further, devices other than automobiles may be used.
[0026]
【The invention's effect】
According to the first aspect of the present invention, there is provided a dynamic damper in which a distance between a plurality of mounted portions on an object to be mounted is short, and the dynamic damper can be mounted without a large work space on the mounted portion side of the object to be mounted. We were able to.
[0027]
According to the configuration of the second aspect, in addition to the same effect as the effect of the first aspect, the durability can be further improved, and the retaining member is reinforced with the falling-off preventing member. Since they are also used as members, the structure can be simplified and the manufacturing cost can be reduced.
[0028]
According to the configuration of the third aspect, in addition to achieving the same effect as the effect of the configuration of the first or second aspect, it is possible to configure a strong structure and improve the durability.
[0029]
According to the configuration of the fourth aspect, in addition to the same effect as the effect of any one of the first, second, and third aspects, a wide working space can be provided on the side of the mounting target of the mounting target. The mounting portion can be bolted to the mounting object without the mounting portion.
[Brief description of the drawings]
FIG. 1 is a plan view of a dynamic damper. FIG. 2 is a front view of a dynamic damper.
REFERENCE SIGNS LIST 1 mass body 2 connecting body 3 supporting wall 4 supporting part 5 rubber-like elastic body 6 mounting part 7 back wall 8 of connecting member connecting member 9 first side wall 10 second side wall 11 supported part 14 bolt insertion hole 15 retaining member S space
