VIBRATION DAMPING DEVICE

A vibration damping device including: first and second mounting members; a main rubber elastic body elastically connecting the two members; and a bracket member fit into the first mounting member. A projecting part projects outward from a circumference of the first mounting member, and includes a locking groove whose inner surface is covered by a rubber coating layer and has a locking part on its side wall inner surface. An engaging projection projecting from the bracket member is fit into the locking groove, and a projection tip surface of the engaging projection is abutted on a bottom wall inner surface of the locking groove. A side surface of the engaging projection is locked to the locking part so as to constitute a positioning member that positions the first mounting member and the bracket member to each other. 1. A vibration damping device comprising:a tubular first mounting member having an inner hole used as a fitting hole covered by a rubber coating layer;a second mounting member;a main rubber elastic body elastically connecting the first and second mounting members; anda bracket member fit into the fitting hole of the first mounting member, whereina projecting part is formed partially on a circumference of the first mounting member so as to project toward an outer circumference side,a locking groove is formed on the projecting part so as to open onto an inner circumference surface of the first mounting member, and a groove inner surface of the locking groove is covered by the rubber coating layer,a locking part is provided on a part of the rubber coating layer that constitutes a side wall inner surface of the locking groove,an engaging projection projecting from the bracket member is fit into the locking groove by the bracket member being fit into the first mounting member, and a projection tip surface of the engaging projection is abutted on a bottom wall inner surface of the locking groove, anda side surface of the engaging projection is locked to the ...

FLUID FILLED VIBRATION DAMPING DEVICE

A post-formation filling type fluid filled vibration damping device wherein a first communication groove, which interconnects a plurality of through holes, is formed in a partition member that separates a pressure receiving chamber and an equilibrium chamber, the groove being formed in a surface of the partition member that opposes a flexible membrane. In addition, a second communication groove, which connects an orifice passage and at least one of the plurality of through holes, is formed in the surface of the partition member that opposes the flexible membrane. 1. A fluid filled vibration damping device comprising:a first mounting member and a second mounting member, which are elastically connected by a main rubber elastic body;a pressure receiving chamber formed with a wall partially composed of the main rubber elastic body disposed on one side of a partition member provided on a side of the second mounting member;an equilibrium chamber formed with a wall partially composed of a flexible membrane disposed on an other side of the partition member;an orifice passage formed through the partition member to connect the pressure receiving chamber and the equilibrium chamber with each other;a movable member is arranged in a containing space formed in the partition member such that fluid pressures of the pressure receiving chamber and the equilibrium chamber are exerted on the movable member via a plurality of through holes that penetrate through walls of the containing space; anda fluid injection passage that is communicated with the pressure receiving chamber and the equilibrium chamber with an opening thereof out to an exterior closed,wherein the partition member is formed with a first communication groove opening up to a surface of the partition member facing the flexible membrane to communicate the plurality of through holes with each other, and a second communication groove opening up to the surface of the partition member facing the flexible membrane to ...

Electromagnetic actuator and fluid-filled active vibration damping device using the same

An electromagnetic actuator wherein an annular supporting member secured to a stator and an oscillator member secured to a movable member are disposed in opposition in an axis-perpendicular direction and are elastically linked by a supporting rubber elastic body disposed therebetween. One axial face of the supporting rubber elastic body is furnished with an inside peripheral recessed portion and an outside peripheral protruding portion while another axial face is furnished with an inside peripheral protruding portion and an outside peripheral recessed portion so as to establish in the supporting rubber elastic body an elastic center axis that curves along a sinuous trajectory of an interconnected peak segment and valley segment situated between opposing faces of the annular supporting member and the oscillator member in the axis-perpendicular direction.

Fluid filled vibration damping device

A post-formation filling type fluid filled vibration damping device wherein a first communication groove, which interconnects a plurality of through holes, is formed in a partition member that separates a pressure receiving chamber and an equilibrium chamber, the groove being formed in a surface of the partition member that opposes a flexible membrane. In addition, a second communication groove, which connects an orifice passage and at least one of the plurality of through holes, is formed in the surface of the partition member that opposes the flexible membrane.

Fluid charging type vibration isolating device

(57)【要約】 【課題】防振性能や耐久性などに優れる構造を確保する とともに、部品数の低減化を図り、生産性の向上を図り 得る液体封入式防振装置を提供する。 【解決手段】主軸金具１と、主軸金具１に固着され，そ の外周部に液体Ｌが封入されオリフィス通路３５を介し て互いに連通する主液室３３及び副液室３４を形成する 凹部を有する略円筒状のゴム弾性体３と、ゴム弾性体３ の外側に同軸状に配置され前記凹部を液密的に閉塞する 外筒金具４と、主軸金具１に設けられ主軸金具１と外筒 金具４との所定以上の相対変位を規制するストッパ部材 ５と、ゴム弾性体３の軸方向両側で主液室３３を区画す る側壁部３１に埋設され側壁部３１の膨出変形を規制す る拘束部材６とを備え、ストッパ部材５及び拘束部材６ は、ゴム弾性体３に埋設され両者を連結する連結部７と ともに一体に形成されている。

Fluid filled vibration damping device

Liquid-confined vibration isolator

A vibration isolator includes a first metallic mounting member; a metallic body member disposed away from the first metallic mounting member in the vibration input direction; an elastic body portion elastically connecting the first metallic mounting member and the metallic body member; and a second metallic mounting member. The metallic body member includes a flange portion protruding radially outward from a part of its end facing the first metallic mounting member and a first protrusion protruding radially outward from the remaining part of the end to a greater extent than does the flange portion. The opposite end of the metallic body member is plugged with a seal member to thereby form a liquid chamber within the metallic body member. The second metallic mounting member is fixedly press-fitted onto the metallic body member and includes a second protrusion. The first and second protrusions are superposed to thereby form a stopper portion. The stopper portion is covered and held by a stopper covering portion.

液体封入式防振装置

(57)【要約】 【課題】 車両の乗り心地を向上させ、左右方向の振動 入力に対する減衰性能を適正に確保し、高周波領域にお ける振動吸収特性の優れた液体封入式防振装置を提供す る。 【解決手段】 内筒金具１０に固定されて径方向両側に 突出するストッパ部材２０と、内筒金具の外周側に離間 して同軸状に配設され、軸方向両端位置に設けたリング 部３１と、リング部を連結する一対の連結部３２とを有 する中間金具３０と、リング部と内筒金具間を連結する 側壁部４１と、軸方向に延びて連結部と内筒金具間を連 結する腕部４２とを有するゴム弾性体４０と、中間金具 の外周に薄肉のゴムシール部５１を介して固定される外 筒金具５０とを備える。腕部に、軸方向に貫通し延長方 向で側壁部を貫通する一対の貫通孔４３を設け、ストッ パ部材の先端部分の周方向両側に腕部に対して略平行に 突出した突出部２２を設け、突出部の先端位置を腕部に 設けた貫通孔の径方向外側端部と同一またはそれより外 側位置とする。

Vibration damping device

There is provided a vibration damping device including; a pair of rubber arm portions connecting an inner fitting and an outer fitting to each other in the horizontal direction; and a rubber leg portion connecting in the vertical direction; the paired rubber arm portions are formed so that the thickness thereof decreases gradually from the inner fitting side toward the outer fitting side, and the rubber leg portion is formed so that each of both side surfaces is formed by an inwardly depressed curved surface, and is formed into a curved broaden shape toward the outer fitting side. Thereby, a spring constant in the horizontal direction is increased advantageously while a spring constant in the vertical direction kept large, and the durability of the rubber elastic body can be increased effectively.

Vibration damping device

There is provided a vibration damping device including; a pair of rubber arm portions connecting an inner fitting and an outer fitting to each other in the horizontal direction; and a rubber leg portion connecting in the vertical direction; the paired rubber arm portions are formed so that the thickness thereof decreases gradually from the inner fitting side toward the outer fitting side, and the rubber leg portion is formed so that each of both side surfaces is formed by an inwardly depressed curved surface, and is formed into a curved broaden shape toward the outer fitting side. Thereby, a spring constant in the horizontal direction is increased advantageously while a spring constant in the vertical direction kept large, and the durability of the rubber elastic body can be increased effectively.

Cylindrical vibration damping apparatus and method of manufacturing the same

A cylindrical vibration damping apparatus having an elastic body connecting an inner shaft and an outer cylinder member, and a pair of rubber stop plates disposed at axial ends of the inner shaft member. Each rubber stop plate has a mount hole that fits about the outside of the inner shaft member. Pairs of mating projections and mating recesses are provided to an interface between an inner circumferential surface of the mount hole of the each rubber stop plate and an outer circumferential surface of the corresponding axial end of the inner shaft member at three or more different intervals in a circumferential direction so that the pair of rubber stop plates are installed onto the axial ends of the inner shaft member with correct identification of a front and back and a circumferential position about the inner shaft member. A method of manufacturing the same is also disclosed.