Inverted type liquid sealed mount

摘要

Annular liquid chamber resonance in an inverted type liquid sealed mount is controlled without using flow resistance. In an engine mount including a secondary liquid chamber located in an upper position, a primary liquid chamber located in a lower position, a main body section of an insulator projecting upwardly in substantially a chevron shape, and an annular liquid chamber formed around the main body section, a control projection is provided on an outside wall of the main body section to project upwardly and configured to produce elastic body resonance in the vicinity of a resonance frequency of annular liquid chamber resonance. With this construction, the annular liquid chamber resonance is controllable by the elastic body resonance of the control projection, and the control projection is increased in size so as to endure flow resistance whereby to improve durability.

主权项

1. An inverted type liquid sealed mount comprising:
an inner metal fitting being mounted on one of a vibration source side and a vibration receiving side, an outer metal fitting being mounted on the other thereof, an insulator elastically connecting the inner metal fitting and the outer metal fitting, a liquid chamber being formed among the outer metal fitting, the insulator and a diaphragm covering an opening part of the insulator, a partition member for partitioning the liquid chamber into a lower primary liquid chamber and an upper secondary liquid chamber, a damping orifice being provided in the partition member to provide communication between the primary liquid chamber and the secondary liquid chamber and configured to produce a liquid resonance at a predetermined vibration, a main body section being formed by a part of the insulator and projecting upwardly in substantially a chevron shape in the direction of a mount axis, an annular liquid chamber being provided around the main body section and forming a part of the primary liquid chamber, and a control projection being integrally provided in an outside part of the main body section so as to project in the direction of the mount axis, the control projection has a ring shape in a plan view and is extending from an inclined surface portion of the main body section of substantially the chevron shape, said control projection being a single control projection, when a distance between a smallest diameter portion of the main body section and a liner layer provided on an inner surface of the outer metal fitting is W, the control projection is provided in a region of 3W/5 or less from the smallest diameter portion, an annular liquid chamber resonance of the annular liquid chamber is produced in a higher frequency range of the liquid resonance of the damping orifice, and an anti-resonance is produced in a higher frequency range of the annular liquid chamber resonance, wherein the control projection is allowed to produce an elastic body resonance in the frequency range of the anti-resonance due to the annular liquid chamber resonance of the annular liquid chamber.