JPH0393637U

JPH0393637U -

Info

Publication number: JPH0393637U
Application number: JP146990U
Authority: JP
Priority date: 1990-01-10
Filing date: 1990-01-10
Publication date: 1991-09-25
Anticipated expiration: 2004-11-30
Also published as: JPH0647147Y2

Description

[Brief explanation of the drawing]

第１図は、本考案に従う構造とされたエンジン
マウントの一実施例を示す横断面図であり、第２
図は、第１図における−断面図である。また
、第３図は、第１図に示されているエンジンマウ
ントを構成する一体加硫成形品を示す横断面図で
あり、第４図は、第３図における−断面図で
ある。更に、第５図は、第１図に示されているエ
ンジンマウントを構成する第一のオリフイス金具
を示す断面図であり、第６図は、第５図における
ａ矢視展開図である。更にまた、第７図は、第１
図に示されているエンジンマウントを構成する第
二のオリフイス金具を示す断面図であり、第８図
は、該第二のオリフイス金具の平面図である。ま
た、第９図は、第１図に示されているエンジンマ
ウントの車両への装着状態を示す断面説明図であ
る。更にまた、第１０図及び第１１図は、それぞ
れ、第１図に示されている如き構造のエンジンマ
ウントにおける防振特性を測定した結果を、比較
例と共に示すグラフである。１０……内筒金具、１２……外筒金具、１４…
…ゴム弾性体、１６……金属スリーブ、３６……
第一のオリフイス金具、３８……第二のオリフイ
ス金具、５０……隔壁、６０……第一のダイヤフ
ラム、６２……第二のダイヤフラム、６４……受
圧室、６６……第一の平衡室、６８……第二の平
衡室、７０……第一の空気室、７２……貫通孔、
７４……第二の空気室、７６……第一のオリフイ
ス通路、７８……第二のオリフイス通路。 FIG. 1 is a cross-sectional view showing one embodiment of an engine mount having a structure according to the present invention;
The figure is a - sectional view in FIG. 1. Moreover, FIG. 3 is a cross-sectional view showing an integrally vulcanized molded product constituting the engine mount shown in FIG. 1, and FIG. 4 is a cross-sectional view taken in FIG. Furthermore, FIG. 5 is a sectional view showing the first orifice metal fitting that constitutes the engine mount shown in FIG. 1, and FIG. 6 is a developed view taken in the direction of arrow a in FIG. 5. Furthermore, FIG.
FIG. 8 is a sectional view showing a second orifice fitting that constitutes the engine mount shown in the figure, and FIG. 8 is a plan view of the second orifice fitting. Further, FIG. 9 is an explanatory cross-sectional view showing a state in which the engine mount shown in FIG. 1 is attached to a vehicle. Furthermore, FIGS. 10 and 11 are graphs showing the results of measuring the vibration damping characteristics of the engine mount having the structure shown in FIG. 1, together with comparative examples. 10...Inner cylinder metal fitting, 12...Outer cylinder metal fitting, 14...
...Rubber elastic body, 16...Metal sleeve, 36...
First orifice fitting, 38... Second orifice fitting, 50... Partition wall, 60... First diaphragm, 62... Second diaphragm, 64... Pressure receiving chamber, 66... First equilibrium chamber , 68... second equilibrium chamber, 70... first air chamber, 72... through hole,
74...Second air chamber, 76...First orifice passage, 78...Second orifice passage.

Claims

[Scope of Claim for Utility Model Registration] An inner cylindrical metal fitting and an outer cylindrical metal fitting that are arranged at a predetermined distance from each other in the radial direction and are respectively attached to members to be connected for vibration isolation; the inner cylindrical metal fitting and the outer cylindrical metal fitting; Interposed between the tube metal fittings,
a rubber elastic body that integrally connects the two metal fittings; and a rubber elastic body formed between the inner cylindrical metal fitting and the outer cylindrical metal fitting and having a predetermined incompressible fluid sealed therein. a pressure receiving chamber in which input vibration is applied between the inner and outer cylindrical fittings based on elastic deformation, causing internal pressure fluctuation; and between the inner cylindrical fitting and the outer cylindrical fitting;
At least a portion of the wall portion formed independently of the pressure receiving chamber is constituted by a first flexible membrane, and internal pressure fluctuations are prevented based on elastic deformation of the first flexible membrane. a first equilibrium chamber with a variable absorption volume; a first orifice passage that allows the pressure receiving chamber and the first equilibrium chamber to communicate with each other to allow fluid to flow between the two chambers; a first air chamber formed on the opposite side of the first equilibrium chamber with the first flexible membrane in between and communicated with an external space; and the inner cylindrical metal fitting. Between the outer cylinder metal fitting,
At least a portion of the wall portions formed independently for the pressure receiving chamber and the first equilibrium chamber are constituted by a second flexible membrane, and the wall portion of the second flexible membrane is a second equilibrium chamber with a variable volume in which internal pressure fluctuations are absorbed based on elastic deformation; and the pressure receiving chamber and the second equilibrium chamber are communicated with each other to allow fluid flow between the two chambers. , a second orifice passage having a larger cross-sectional area/length ratio than the first orifice passage; and a second orifice passage located on the opposite side of the second equilibrium chamber across the second flexible membrane. A fluid-filled cylindrical mount device comprising: a sealed second air chamber of a predetermined volume formed by: