Patent ID: 9057417
Filing Date: 2015-06-16
Classification: B60K,F16F

Abstract:
1. A vibration isolation unit comprising: a liquid-sealed vibration isolation device including a cylindrical outer tube member, a boss member positioned on the lower end side of the outer tube member, a vibration isolation base body connecting the boss member and the outer tube member to each other and formed of a rubber-like elastic body, a diaphragm attached on the upper end side of the outer tube member, forming a liquid-sealed chamber between the vibration isolation base body and the diaphragm and formed of a rubber-like elastic body, a partition member partitioning the liquid-sealed chamber into a first liquid chamber on the vibration isolation base body side and a second liquid chamber on the diaphragm side, and an orifice allowing the first liquid chamber and the second liquid chamber to communicate with each other; an engine side bracket including a pressed-in part to which the outer tube member of the liquid-sealed vibration isolation device is pressed-in and which is connected to the engine side; a vehicle body side bracket including a bottom surface to which the boss member of the liquid-sealed vibration isolation device is fixed, a pair of side walls erected from the bottom surface and opposing to each other embracing the liquid-sealed vibration isolation device, and an upper surface connecting the pair of side walls to each other and opposing the bottom surface embracing the liquid-sealed vibration isolation device, and connected to a vehicle body side; and a stopper rubber member interposed between the side wall of the vehicle body side bracket and the pressed-in part of the engine side bracket and formed of a rubber-like elastic body; wherein the stopper rubber member includes stopper rubber upper surfaces of which one side continues to an outer edge of the diaphragm and which are disposed on the upper end side of the pressed-in part of the engine side bracket, and stopper rubber side walls hung down from the other side of the stopper rubber upper surfaces and disposed between the side walls of the vehicle body side bracket and the pressed-in part of the engine side bracket; and further comprising: an annular attaching member to which the diaphragm is vulcanizingly adhered and which is formed of a resin material into an annular shape when viewed in the axial direction; wherein the outer tube member is formed of a resin material into a cylindrical shape, and the diaphragm is attached to the upper end side of the outer tube member by that the annular attaching member is welded to the outer tube member by welding.