Patent ID: 9222543
Filing Date: 2015-12-29
Classification: F16F,Y10T

Abstract:
1. A liquid-sealed-type anti-vibration device comprising: an inner-tube member to be connected to a member on either one of a vibration-generating side and a vibration-transmitted side; an outer-tube member located outside of the inner-tube member to be connected to a member on the other one of the vibration-generating side and the vibration-transmitted side; a first rubber body for connecting one end of the outer-tube member with an outer circumferential surface of the inner-tube member in a liquid-tight manner; a second rubber body for connecting the other end of the outer-tube member with the outer circumferential surface of the inner-tube member in a liquid-tight manner; a fluid chamber configured in such a way that a space defined by the first rubber body, the second rubber body, the inner-tube member and the outer-tube member is sealingly filled with non-compressible liquid, wherein the inner-tube member is provided with an inner-tube rigid protrusion at an intermediate section of the inner-tube member in an axial direction, the protrusion protruding from the outer circumferential surface of the inner-tube member toward the outer-tube member and extending over an entire circumference of the inner-tube member, a rubber partition is provided to connect an outer circumferential surface of the inner-tube rigid protrusion and an inner circumferential surface of the outer-tube member with each other in a liquid-tight manner to divide the fluid chamber into two liquid chambers with the inner-tube rigid protrusion, and the inner-tube rigid protrusion is provided with a limiting passage which allows the liquid chambers to communicate with each other, the outer-tube member has a first outer-tube rigid protrusion protruding from the inner circumferential surface of the outer-tube member toward the inner-tube member through the first rubber body and having a shape of an inward flange; and a second outer-tube rigid protrusion protruding from the inner circumferential surface of the outer-tube member toward the inner-tube member through the second rubber body and having a shape of an inward flange, and at least one of the first outer-tube rigid protrusion and the second outer-tube rigid protrusion is located on the side of the liquid chamber, and each of the first rubber body and the second rubber body is provided with a ring-shaped cavity extending inside the respective rubber body along the outer circumferential surface of the inner-tube member and having a depth, in a section that includes a central axis of the inner-tube member and that is taken along the central axis, axially extending past the first outer-tube rigid protrusion or the second outer-tube rigid protrusion, at least one of the cavities facing one of the liquid chambers; the limiting passage is provided within the inner-tube rigid protrusion; the first outer-tube rigid protrusion protrudes from the inner circumferential surface of the outer-tube member toward the inner-tube member; and the second outer-tube rigid protrusion protrudes from the inner circumferential surface of the outer-tube member toward the inner-tube member.