Abstract: A mounting structure of a dynamic damper capable of effectively reducing the vibration of a vibration body is provided. The mounting structure includes a suspension member 100 inhibiting the upward shift of a mass member 5. The suspension member 100 and plates 3 are configured as separate members, so that as compared with the case where a pair of plates 3 are coupled, the opposite interval between the plates 3 can be determined without being affected by the dimension accuracy of such the coupling portion. Thus, the thicknesses of the rubber elastic bodies 4 can foe formed at high accuracy, so that the mass member 5 can be easily vibrated at the desired frequency. Therefore, the vibration of the suspension member 100 can be effectively reduced.

Abstract: Provided is a liquid-filled vibration isolator through which durability of an elastic movable body can be improved. In a case that a liquid pressure of liquid passing through a second orifice P2 is exerted to an outer circumference portion 12 of an elastic movable body 10, whole of the outer circumference portion 12 deforms so as to bend. Based on deformation of the outer circumference portion 12, a first valve portion 13 and facing surfaces 81c, 91c mutually contact or separate. Thereby, the communication state and the blocking state of the second orifice P2 are switched. Since it can be restrained that stress is concentrated in a part of the outer circumference portion 12 by wholly bending the outer circumference portion 12, cracks are less likely to occur in the outer circumference portion 12.

Abstract: A mounting structure of a dynamic damper capable of effectively reducing the vibration of a vibration body is provided. The mounting structure includes a suspension member 100 inhibiting the upward shift of a mass member 5. The suspension member 100 and plates 3 are configured as separate members, so that as compared with the case where a pair of plates 3 are coupled, the opposite interval between the plates 3 can be determined without being affected by the dimension accuracy of such the coupling portion. Thus, the thicknesses of the rubber elastic bodies 4 can foe formed at high accuracy, so that the mass member 5 can be easily vibrated at the desired frequency. Therefore, the vibration of the suspension member 100 can be effectively reduced.

Abstract: Provided is a liquid-filled vibration isolator through which durability of an elastic movable body can be improved. In a case that a liquid pressure of liquid passing through a second orifice P2 is exerted to an outer circumference portion 12 of an elastic movable body 10, whole of the outer circumference portion 12 deforms so as to bend. Based on deformation of the outer circumference portion 12, a first valve portion 13 and facing surfaces 81c, 91c mutually contact or separate. Thereby, the communication state and the blocking state of the second orifice P2 are switched. Since it can be restrained that stress is concentrated in a part of the outer circumference portion 12 by wholly bending the outer circumference portion 12, cracks are less likely to occur in the outer circumference portion 12.

Abstract: In a hydraulic style vibration-proof device, a lower attachment fitting (34) forming an air chamber (36) between a diaphragm (16) and itself is fabricated of aluminum and is provided at its bottom wall portion with a through-hole (50), and a bolt (52) having a serration portion (54) below its head is press fitted in and secured to the through-hole, thereby fixedly providing the bolt (52) without involving a large projection into the air chamber (36) and at a low cost Further, the bottom wall portion (34B) is formed to be thicker than a peripheral wall portion (34C) of the lower attachment fitting and both are interconnected by a curved portion (34D), thereby achieving an increase in strength.

Abstract: A hydraulic antivibration device arrangement capable of achieving a downsizing and weight reduction, and a reduction of booming noise by suppressing a reaction force to impingement upon stopper action is provided. By disposing a protuberant rubber portion 35 at an upper end of a main body member 2, its spacing distance from a roll center can be lengthened, the reaction force to impingement can be diminished, and input load to the main body member 2 can be diminished. Consequently, reduction of rigidity and strength required for respective components as well as enhancement of durability is possible, which permits to make the components thin-walled thereby making a hydraulic antivibration device arrangement 100 lightweight as a whole. Diminishing of such reaction force upon stopper action also enables vibrations input through a car body side bracket 120 to the body frame to be suppressed, thereby reducing the generation of booming noise.

Abstract: A hydraulic antivibration device arrangement capable of achieving a downsizing and weight reduction, and a reduction of booming noise by suppressing a reaction force to impingement upon stopper action is provided. By disposing a protuberant rubber portion 35 at an upper end of a main body member 2, its spacing distance from a roll center can be lengthened, the reaction force to impingement can be diminished, and input load to the main body member 2 can be diminished. Consequently, reduction of rigidity and strength required for respective components as well as enhancement of durability is possible, which permits to make the components thin-walled thereby making a hydraulic antivibration device arrangement 100 lightweight as a whole. Diminishing of such reaction force upon stopper action also enables vibrations input through a car body side bracket 120 to the body frame to be suppressed, thereby reducing the generation of booming noise.

Abstract: In a hydraulic style vibration-proof device, a lower attachment fitting (34) forming an air chamber (36) between a diaphragm (16) and itself is fabricated of aluminum and is provided at its bottom wall portion with a through-hole (50), and a bolt (52) having a serration portion (54) below its head is press fitted in and secured to the through-hole, thereby fixedly providing the bolt (52) without involving a large projection into the air chamber (36) and at a low cost Further, the bottom wall portion (34B) is formed to be thicker than a peripheral wall portion (34C) of the lower attachment fitting and both are interconnected by a curved portion (34D), thereby achieving an increase in strength.

Abstract: In order to provide a vibration-isolating device having a stopper mechanism to an excessive displacement of a vibration-isolating base in upward and horizontal directions with a light weight and a low cost, an inner cylinder and an attachment member with an opening surrounding it are connected by a rubber-like elastomer, a cylindrical portion is extended downwardly from the opening to form a stopper rubber between the cylindrical portion and the inner cylinder, while ensuring a clearance gap thereby providing a first stopper part limiting a horizontal displacement of the inner cylinder; and an extension portion extending from a lower end of the inner cylinder outwardly is provided to form a stopper rubber between the extension portion and a lower end of the cylindrical portion while ensuring a clearance gap thereby providing a second stopper part limiting an upward displacement of the inner cylinder.

Abstract: The invention provides a liquid-sealed vibration-proof device, whose partition is constituted of and shaped separately by an orifice member having an orifice channel, a partition plate member forcing its outer periphery toward an outer peripheral end of a vibration-proof base on the liquid chamber side, and a second diaphragm closing a central opening of the orifice member. A recessed groove of a marginal portion of the second diaphragm is press-fitted in and engaged with a hook portion projecting inwardly of the orifice member, and a bottom wall of the recessed groove is pinched and pressed by the hook portion and the partition plate member, whereby the assembling is facilitated, ensuring a reliability and functionality of a product.

Abstract: A liquid-sealed anti-vibration device wherein an annular space is formed between an orifice member and a partition plate member, crimped and fixed downwardly of the orifice member to an anti-vibration device proper, of a partition; and a rubber-like elastic membrane is disposed in the space and has a base portion attached fixedly to the one of the orifice member and the partition plate member and an open terminal at a distal side, the open terminal being slidably in pressure contact with the other, thus constituting a cantilevered sliding membrane structure. Thereby it is possible to diminish the amplitude dependency, to reduce the dynamic spring constant in a wide spectrum of medium and high frequencies, and to lower the noise.

Abstract: The invention provides an antivibration device lightweight and excellent in heat interception, wherein a top opening of a main body fitting (1) and an upper attachment fitting (2) are interconnected through a vibration-isolating base (3); a stopper fitting (8) of a generally cylinder form partly cutout is connected to the main body fitting (1) with its upper edge bent inwardly to form a stopper portion (81), which is located above a stop flange (22) of the upper attachment fitting (2) and has a stopper function against a large vertical displacement; a stopper rubber member (15) is fitted to the stopper fitting (8) so as to extend from the upper surface of the stopper portion (81) to an outer surface of its side plate by vulcanization molding; the cutout portion (83) of the stopper fitting (8) is plugged by a heat shield rubber membrane portion (17) vulcanization molded integrally with the stopper rubber member (15).

Abstract: A vibration isolating device includes a body fitting having a cylindrical barrel, an upper side attached fitting disposed upward an axis center of the body fitting, a rudder isolating substrate to connect both fittings, a stopper fitting fixed at an opening extremities of the body fitting and extending upwardly outside the vibration isolating substrate, its upper end portion being folded inside as a stopper portion, so that the stopper fitting acts as a stopper for large displacement of the upper side attachment fitting caused by vibration, a notch window for drainage and ventilation being formed at at least two opposite places at the lower portion of the stopper fitting, and a protrusion for circumferential positioning fitting-in and engaging with the notch windows provided at the opening extremities of the body fitting.

Abstract: A liquid-sealed vibration-proof device is constructed so that a partition dividing its interior into a main and a subsidiary liquid chamber comprises an orifice member having an orifice, a partition plate member provided subjacently in contact with the orifice member, and an elastomeric membrane interposed between a central plate section of the orifice member and the partition plate member. The elastomeric membrane includes a central plate-form portion held and pinched by the orifice and partition plate members, and a diaphragm portion extending outboard it to terminate at an open end which is slidably brought in pressure contact with an annular wall section of the orifice member. Openings are provided in the central plate section and the partition plate member holding and pinching the central plate-form portion, which is partly exposed to both chambers, as an elastic membrane capable of elastic deformation.

Abstract: The present invention provides a vibration isolating device, having at least two notch windows for drainage and ventilation, which can easily and securely position and secure a stopper fitting to a body fitting, and also restrain from getting out of position due to loading caused by a stopper action, etc.

Abstract: A liquid-sealed anti-vibration device wherein an annular space is formed between an orifice member and a partition plate member, crimped and fixed downwardly of the orifice member to an anti-vibration device proper, of a partition; and a rubber-like elastic membrane is disposed in the space and has a base portion attached fixedly to the one of the orifice member and the partition plate member and an open terminal at a distal side, the open terminal being slidably in pressure contact with the other, thus constituting a cantilevered sliding membrane structure. Thereby it is possible to diminish the amplitude dependency, to reduce the dynamic spring constant in a wide spectrum of medium and high frequencies, and to lower the noise.

Abstract: The invention provides a liquid-sealed vibration-proof device, whose partition is constituted of and shaped separately by an orifice member having an orifice channel, a partition plate member forcing its outer periphery toward an outer peripheral end of a vibration-proof base on the liquid chamber side, and a second diaphragm closing a central opening of the orifice member. A recessed groove of a marginal portion of the second diaphragm is press-fitted in and engaged with a hook portion projecting inwardly of the orifice member, and a bottom wall of the recessed groove is pinched and pressed by the hook portion and the partition plate member, whereby the assembling is facilitated, ensuring a reliability and functionality of a product.

Abstract: The invention provides an antivibration device lightweight and excellent in heat interception, wherein a top opening of a main body fitting (1) and an upper attachment fitting (2) are interconnected through a vibration-isolating base (3); a stopper fitting (8) of a generally cylinder form partly cutout is connected to the main body fitting (1) with its upper edge bent inwardly to form a stopper portion (81), which is located above a stop flange (22) of the upper attachment fitting (2) and has a stopper function against a large vertical displacement; a stopper rubber member (15) is fitted to the stopper fitting (8) so as to extend from the upper surface of the stopper portion (81) to an outer surface of its side plate by vulcanization molding; the cutout portion (83) of the stopper fitting (8) is plugged by a heat shield rubber membrane portion (17) vulcanization molded integrally with the stopper rubber member (15).