JP2005090614A

JP2005090614A - Vibration control mechanism for onboard case

Info

Publication number: JP2005090614A
Application number: JP2003323972A
Authority: JP
Inventors: Takashi Kodama; 孝児玉
Original assignee: Hitachi Kokusai Electric Inc
Current assignee: Hitachi Kokusai Electric Inc
Priority date: 2003-09-17
Filing date: 2003-09-17
Publication date: 2005-04-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control mechanism for an onboard case capable of miniaturizing the case and reducing cost. <P>SOLUTION: The vibration control mechanism for an onboard case formed of an outside case 1 and an inside case 2 is provided with a spring material 3 for connecting the outside case 1 to the inside case 2, and brush groups 7a and 7b which interfere with each other are provided in opposite surfaces of the outside case and the inside case. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、鉄道車両などの振動体に実装される車上筐体の防振機構に関する。 The present invention relates to a vibration isolation mechanism for an on-vehicle housing mounted on a vibration body such as a railway vehicle.

図３に従来技術を示す。 FIG. 3 shows the prior art.

外側筐体１の内側に電子機器などを実装するための内側筐体２がある。内側筐体２は外側筐体１からの振動が直接伝わらないようばね材３で中空に保持されている。しかし、このままでは内側筐体２とばね材３から成立する系の固有値、すなわち共振点で内側筐体２が無限大に発振してしまう。それを抑制するためにＸ軸、Ｙ軸、Ｚ軸のそれぞれにショックアブソーバ（粘性抵抗）１０ａ、１０ｂ、１０ｃを設けていた。 There is an inner housing 2 for mounting an electronic device or the like inside the outer housing 1. The inner casing 2 is held hollow by a spring material 3 so that vibration from the outer casing 1 is not directly transmitted. However, in this state, the inner casing 2 oscillates infinitely at the eigenvalue of the system formed by the inner casing 2 and the spring material 3, that is, at the resonance point. In order to suppress this, shock absorbers (viscous resistance) 10a, 10b, and 10c are provided on each of the X, Y, and Z axes.

また、従来の車載用機器の防振装置としては、特開平６−４４７６２号公報が知られている。 Japanese Unexamined Patent Publication No. Hei 6-44762 is known as a conventional vibration isolator for in-vehicle equipment.

特開平６−４４７６２号公報JP-A-6-44762

上記従来技術では、共振点での発振を抑制するためのショックアブソーバが大型且つ高価であったため、筐体が大がかりなものになってしまうという課題を有していた。 In the above-described conventional technology, the shock absorber for suppressing the oscillation at the resonance point is large and expensive, so that there is a problem that the housing becomes large.

本発明の目的は、上記課題を解決すべく、筐体の小型化および低価格化を実現できる車上筐体の防振機構を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration isolation mechanism for an on-vehicle casing that can realize a reduction in size and cost of the casing in order to solve the above-described problems.

上記目的を達成するために、本発明は、外側筐体と内側筐体とからなる車上筐体において、前記外側筐体と前記内側筐体とを繋ぐばね材と、前記外側筐体と前記内側筐体とが対峙する面の夫々に、互いが干渉し合う（拘わり合う）ブラシ群とを備えることを特徴とする車上筐体の防振機構である。外側筐体と内側筐体の対峙する面としては、少なくともＸ方向、Ｙ方向およびＺ方向に向いた面を有することになる。 To achieve the above object, the present invention provides an on-vehicle housing comprising an outer housing and an inner housing, a spring material connecting the outer housing and the inner housing, the outer housing, and the An anti-vibration mechanism for an on-vehicle housing, comprising a group of brushes that interfere with (involve with) each other on a surface facing the inner housing. As a surface which the outer housing | casing and an inner housing | casing oppose, it has a surface which faced at least X direction, Y direction, and Z direction.

以上説明したように、本発明によれば、共振点での発振の抑制をブラシという極めて省スペースで、しかも安価な部材で行うため、車上筐体の小型化及び低価格化を実現できる効果を奏する。 As described above, according to the present invention, since the suppression of oscillation at the resonance point is performed with a very space-saving and inexpensive member such as a brush, it is possible to reduce the size and the price of the on-vehicle housing. Play.

本発明に係る車上筐体の防振機構の実施の形態について図面を用いて説明する。 An embodiment of a vibration isolating mechanism for an on-vehicle housing according to the present invention will be described with reference to the drawings.

図１は、本発明に係る車上筐体の防振機構の一実施の形態を示す図である。 FIG. 1 is a diagram showing an embodiment of a vibration isolating mechanism for an on-vehicle casing according to the present invention.

電子機器などが実装された内側筐体２は、例えば車上筐体である外側筐体１からの比較的低い周波数の振動が直接伝わらないようばね材３で中空に保持されて構成される。即ち、上記外側筐体１と上記内側筐体２とからなる車上筐体において、ばね材３は、上記外側筐体１と上記内側筐体２とを繋ぐように構成される。そして、図１に示すように、上記外側筐体１と上記内側筐体２とが対峙する面（内側筐体２の下面は除く）の夫々には、互いが干渉し合う（拘わり合う）ブラシ群７ａ、７ｂが設けられることになる。 The inner housing 2 on which an electronic device or the like is mounted is configured to be held hollow by a spring material 3 so that vibration of a relatively low frequency from the outer housing 1 that is an on-vehicle housing is not directly transmitted. In other words, in the on-vehicle casing composed of the outer casing 1 and the inner casing 2, the spring material 3 is configured to connect the outer casing 1 and the inner casing 2. As shown in FIG. 1, brushes that interfere with each other on the surfaces (excluding the lower surface of the inner housing 2) where the outer housing 1 and the inner housing 2 face each other. Groups 7a and 7b are provided.

即ち、外側筐体１の内側面（Ｙ方向の左右の内側面、Ｘ方向の前後の内側面及びＺ方向の上面の内側面）と電子機器が実装された内側筐体２の外側面（Ｙ方向の左右の外側面、Ｘ方向の前後の外側面及びＺ方向の上面の外側面）とには、それぞれ、針状若しくは細棒状で、且つ繊維状（炭素繊維や金属繊維も含む）のブラシ群７ａ、７ｂが高密度に貼り付けられている。ところで、電子機器などが実装された内側筐体２と該内側筐体２をばね材３で支える外側筐体１との間のＺ方向の側面には、４として、高密度に貼り付けられたブラシ群７ａ、７ｂが図２に示すように互いに噛み合ってＸ方向およびＹ方向に干渉しあって（拘わりあって）抵抗が生じるように形成されている。さらに、上記内側筐体２と上記外側筐体１との間のＸ方向の両側面には、５として、高密度に貼り付けられたブラシ群７ａ、７ｂが図２に示すように互いに噛み合ってＹ方向およびＺ方向に干渉しあって（拘わりあって）抵抗が生じるように形成されている。さらに、上記内側筐体２と上記外側筐体１との間のＹ方向の両側面には、６として、高密度に貼り付けられたブラシ群７ａ、７ｂが図２に示すように互いに噛み合ってＸ方向およびＺ方向に干渉しあって（拘わりあって）抵抗が生じるように形成されている。 That is, the inner surface of the outer housing 1 (the inner surface on the left and right in the Y direction, the inner surface on the front and rear in the X direction, and the inner surface of the upper surface in the Z direction) and the outer surface of the inner housing 2 on which the electronic device is mounted (Y The right and left outer surfaces, the front and rear outer surfaces in the X direction, and the outer surface of the upper surface in the Z direction are respectively needle-like or thin rod-like and fibrous (including carbon fibers and metal fibers) brushes. The groups 7a and 7b are attached with high density. By the way, the side surface in the Z direction between the inner housing 2 on which the electronic device or the like is mounted and the outer housing 1 that supports the inner housing 2 with the spring material 3 is affixed at a high density as 4. As shown in FIG. 2, the brush groups 7a and 7b are formed so as to mesh with each other and interfere with each other in the X direction and the Y direction so as to generate resistance. Further, on both side surfaces in the X direction between the inner housing 2 and the outer housing 1, brush groups 7a and 7b, which are affixed at a high density of 5, are meshed with each other as shown in FIG. It is formed so as to generate resistance by interfering with (involved in) the Y direction and the Z direction. Further, on both side surfaces in the Y direction between the inner casing 2 and the outer casing 1, brush groups 7 a and 7 b affixed at a high density as 6 mesh with each other as shown in FIG. 2. It is formed so as to cause resistance by interfering with (involved in) the X direction and the Z direction.

従って、上記内側筐体２と上記外側筐体１との間において、上下方向（Ｚ方向）の比較的高い周波数の振動に対しては、４個所（Ｘ方向の両側及びＹ方向の両側）に存在する互いに噛み合ったブラシ群５、６が干渉しあって抵抗することになり、振動（ずれ運動）を抑制するように働く。同時に、Ｘ方向の比較的高い周波数の振動に対しては、３個所（Ｙ方向の両側及びＺ方向の１個所）に存在する互いに噛み合ったブラシ群４、６が干渉しあって抵抗することになり。振動（ずれ運動）を抑制するように働く。同時に、Ｙ方向の比較的高い周波数の振動に対しては、３個所（Ｘ方向の両側及びＺ方向の１個所）に存在する互いに噛み合ったブラシ群４、５が干渉しあって抵抗することになり。振動（ずれ運動）を抑制するように働く。 Therefore, between the inner housing 2 and the outer housing 1, there are four locations (both sides in the X direction and both sides in the Y direction) with respect to relatively high frequency vibrations in the vertical direction (Z direction). The existing brush groups 5 and 6 that mesh with each other interfere with each other and resist, and work to suppress vibration (shifting motion). At the same time, the relatively meshed brush groups 4 and 6 existing at three locations (on both sides in the Y direction and one location in the Z direction) interfere with each other and resist against vibrations having a relatively high frequency in the X direction. That's it. It works to suppress vibration (slip motion). At the same time, the relatively high frequency vibrations in the Y direction are resisted by interference between the brush groups 4 and 5 that are in mesh with each other at three locations (on both sides in the X direction and one location in the Z direction). That's it. It works to suppress vibration (slip motion).

以上説明したように、高密度に貼り付けられた各ブラシ群７ａ、７ｂは図２に示すように互いに噛み合って干渉し合っている。従って、例えば車上筐体である外側筐体１からの比較的高い周波数の振動が発生して内側筐体２との間で、高密度に貼り付けられたブラシ群７ａ、７ｂが相対的にずれる運動をすると、ブラシ群同士の干渉が抵抗となり、ずれ運動を抑制するように働く。このようにブラシ群同士の干渉抵抗を利用して、外側筐体１に対する内側筐体２が共振点での発振を抑制することが可能となる。 As described above, the brush groups 7a and 7b attached at a high density mesh with each other and interfere with each other as shown in FIG. Therefore, for example, a relatively high frequency vibration is generated from the outer casing 1 which is an on-vehicle casing, and the brush groups 7a and 7b attached to the inner casing 2 at a high density are relatively When the movement is shifted, the interference between the brush groups becomes resistance, and works to suppress the displacement movement. In this way, by utilizing the interference resistance between the brush groups, the inner casing 2 relative to the outer casing 1 can suppress oscillation at the resonance point.

本発明に係る車上筐体の防振機構の一実施の形態を示す斜視図である。It is a perspective view which shows one Embodiment of the vibration isolating mechanism of the vehicle-mounted housing | casing which concerns on this invention. 本発明に係る外側筐体と内側筐体との間に設けられたブラシ群の構成を示す側面図である。It is a side view which shows the structure of the brush group provided between the outer side housing | casing which concerns on this invention, and an inner side housing | casing. 従来の車上筐体の防振機構を示す斜視図である。It is a perspective view which shows the anti-vibration mechanism of the conventional on-vehicle housing | casing.

Explanation of symbols

１…外側筐体、２…内側筐体、３…ばね材、４、５、６…互いに噛み合ったブラシ群、７ａ…外側筐体に貼り付けされた高密度のブラシ群、７ｂ…内側筐体に貼り付けされた高密度のブラシ群。 DESCRIPTION OF SYMBOLS 1 ... Outer housing | casing, 2 ... Inner housing | casing, 3 ... Spring material, 4, 5, 6 ... Brush group which meshed | engaged with each other, 7a ... High-density brush group affixed on the outer housing | casing, 7b ... Inner housing | casing A group of high-density brushes pasted on.

Claims

In an on-vehicle housing consisting of an outer housing and an inner housing,
An on-vehicle comprising: a spring material connecting the outer casing and the inner casing; and a group of brushes that interfere with each other on surfaces of the outer casing and the inner casing facing each other. Anti-vibration mechanism for the housing.