Abstract: A fluid-filled type vibration damping device including a resin bracket provided on an outside peripheral face of a second mounting member. The resin bracket includes a mating portion mated within a mating groove of the second mounting member opening in an outside peripheral face of the second mounting member, a mating tubular portion extending on the outside peripheral face of the second mounting member from the mating portion to one axial side, and a mounting portion which is formed at a distal end portion of the mating tubular portion on the one axial side and extends peripherally outward. A weight reducing space opens at a distal end face of the mating tubular portion on the one axial side while extending between an inside peripheral face of the mating tubular portion and the outside peripheral face of the second mounting member in a circumferential direction.

Abstract: In a structure for mounting a subframe, located under a vehicle body, to the vehicle body via an elastic assembly, the elastic assembly includes: a first mounting member located under the vehicle body and over the subframe; a second mounting member located immediately above the first mounting member; and an elastic member disposed between the first and second mounting members. The first mounting member is mounted to the vehicle body, while the second mounting member is mounted to the subframe.

Abstract: A vehicular fluid sealed engine mount 10 includes a first mount member 11 to be mounted on an engine EG, a second mount member 12 to be mounted on a body BD, a resilient member 13 which connects between the first and second mount members, a diaphragm 14 fixed to the second mount member far away from the resilient member, a fluid chamber 15 defined by the resilient member and the diaphragm and a partition member 18 fixed to the second mount member in such a manner as to partition the fluid chamber into a main fluid chamber 16 and an auxiliary fluid chamber 17. The second mount member and the partition member have brittle portions 45, 46 which are deformed or broken when a load En is applied thereto from a direction which intersects with an axial direction of the vehicular fluid sealed engine mount at right angles.

Abstract: A friction stir welding apparatus and a method of operating the friction stir welding apparatus are disclosed. The friction stir welding apparatus includes a rotary tool whose extremity constitutes a probe, a retaining arm which supports the rotary tool, and a roller provided at a position of the retaining arm opposite the rotary tool. The method includes adjusting the retaining arm so as to position workpieces between the rotary tool and the roller while adjusting the roller to turn in a direction where a joint line of the workpieces extends, rotating the rotary tool and lowering the probe until the probe presses the workpieces, gradually inserting the probe into the joint line, and moving the probe along the joint line.

Abstract: To decrease dimensions in the axial direction by dispensing with a stopper while making the control of a value of spring constant easy in the axial direction of a sub-frame mount and in the direction meeting at right angles therewith, an inner cylinder 3 is arranged inside of an outer cylinder which is formed in a substantially cylindrical shape by having a pair of half bodies arranged in an opposed relationship, and a vibration isolating rubber is adapted to connect between the outer cylinder and the inner cylinder. Slits are formed on side walls of the vibration isolating rubber along slits dividing the outer cylinder. Projecting portions are provided on the inner peripheral wall of the outer cylinder to project toward the inner cylinder. The outer cylinder and tips are formed concentrically and a radius of curvature R1 of the inner peripheral wall of the outer cylinder is smaller than a radius of curvature R3 of the opposed outer peripheral wall of the inner cylinder.

Abstract: A vehicle power unit supporting apparatus supports a transversely-mounted power unit having a power source and a speed reduction gear connected to each other. The power unit is supported on a vehicle body by at least a power-source-side mount and a speed-reduction-gear side mount on both of the left and right sides in the vehicle width direction. These mounts are disposed at a position higher than a position of the center of gravity of the power unit. Spring axis lines of the power-source side mount and the speed-reduction-gear side mount are inclined to intersect with each other at a position higher than the position of the center of gravity of the power unit when the vehicle is viewed from the front. An elastic center of the entire power unit supporting apparatus is located at a position lower than the position of the center of gravity of the power unit.

Abstract: A fluid filled type vibration damping device having an orifice passage formed in a partition member to connect a pressure receiving chamber and an equilibrium chamber, wherein a first end section of the orifice passage extends in along a plane of the partition member, and a communication hole is formed to bend at a right angle from the first end of the orifice passage and open towards the pressure receiving chamber to form a dead water region by orthogonal wall faces of a terminal end face and a bottom face of the orifice passage in a connecting corner section of the orifice passage with the communication hole. A shunt hole of smaller cross-sectional area than the orifice passage and the communication hole is formed in a bottom wall so that the pressure receiving chamber and the equilibrium chamber communicate through the shunt hole in the dead water region.

Abstract: A pneumatic actuator for use in a vibration damping device comprising: a base housing; an elastic wall member being fastened fluid-tightly to the base housing to form a working air chamber therebetween; and an urging member positioned within the working air chamber for exerting urging force on an output portion provided to the elastic wall member, such that the output portion is actuated to undergo displacement in opposition to the urging member through change in an air pressure in the working air chamber from an outside. At least one of opposing faces of the base housing and the elastic wall member on the working air chamber side thereof has a plurality of rib portions which extend from an inner circumferential side thereof towards an outer circumferential side thereof. A vibration damping device equipped with the pneumatic actuator is also disclosed.

Abstract: A vehicle vibration-proof apparatus for supporting an engine and preventing transmission of vibrations from the engine includes an elastic member for connecting a first mounting member to be mounted to an engine with a second mounting member to be mounted to a vehicle body. The second mounting member includes a resinous bracket, having a tubular part and mounting parts for being mounted to the vehicle body, and a metal reinforcing bracket to be mounted to the tubular part for reinforcing the tubular part. The tubular part has a part, which is not reinforced longitudinally, between the mounting parts and a part thereof to which the metal reinforcing member is mounted.

Abstract: The object of the present invention is to prevent damages of a vibration isolating rubber and cracks in a welded portion of a sub-frame when press-fitting a sub-frame mount. The sub-frame mount 1 comprises an outer cylinder 2, an inner cylinder 2 and the vibration isolating rubber 4 connecting these outer and inner cylinders. A small diameter portion 10 and a large diameter portion 11 are provided on a lateral wall of a barrel portion of the outer cylinder 2. Between the small diameter portion 10 and the large diameter portion 11 is formed a step-like boundary portion 12. The height in the axial direction of the boundary portion 12 changes in the circumferential direction and has a substantially mountain-like shape with a top 12a projecting in the press fitting direction. A contact area of the large diameter portion 11 contacting a mounting hole 21 of the sub-frame 20 is increased in accordance with an amount of the press fitting.

Abstract: A vibration damping mount assembly having a vibration damping mount main body and a tubular bracket. The tubular bracket is made of lightweight material composed of non-ferric metal or synthetic resin, and has an inside peripheral face including an upper tapered face and a lower tapered face that gradually expand in diameter towards openings at either axial end from an axially medial section. A flanged portion of a second mounting member is axially juxtaposed against an open end of the upper tapered face, while the lower tapered face is pressed against a rubber fitting, with the lower tapered face locked in contact against an annular mating face of the rubber fitting thereby providing dislodging of the vibration damping mount main body from the tubular bracket.

Abstract: To decrease dimensions in the axial direction by dispensing with a stopper while making the control of a value of spring constant easy in the axial direction of a sub-frame mount and in the direction meeting at right angles therewith, an inner cylinder 3 is arranged inside of an outer cylinder which is formed in a substantially cylindrical shape by having a pair of half bodies arranged in an opposed relationship, and a vibration isolating rubber is adapted to connect between the outer cylinder and the inner cylinder. Slits are formed on side walls of the vibration isolating rubber along slits dividing the outer cylinder. Projecting portions are provided on the inner peripheral wall of the outer cylinder to project toward the inner cylinder. The outer cylinder and tips are formed concentrically and a radius of curvature R1 of the inner peripheral wall of the outer cylinder is smaller than a radius of curvature R3 of the opposed outer peripheral wall of the inner cylinder.

Abstract: The present invention relates to a friction stir welding process for joining two members having different shearing strengths, and a friction stir welded structure fabricated by the process. The friction stir welding process includes the step of positioning a first welded member and a second welded member such that both members overlap each other, thereby defining an overlapped region, and the step of inserting a rotating pin into the overlapped region from a surface of the second welded member, so that the first and second welded members are joined together. In this process, the first welded member has a lower shearing strength than that of the second welded member.

Abstract: A vibration isolation device includes two attachment members inter-connected by an elastic member. One of the attachment members comprises a metal tubular member connected to the elastic member, a metal bracket in which the metal tubular member is press-fitted, and a plastic bracket supporting the metal bracket and adapted to be attached to a support body or a vibratory source. The metal bracket has an engagement portion press-fitted with the metal tubular member, and a non-engagement portion offset from the engagement portion in a radial outward direction and held out of press-fitted engagement with the metal tubular member, the non-engagement portion being connected to the plastic bracket with a second elastic member disposed therebetween.

Abstract: A vehicle power unit supporting apparatus 60 is configured so that a transversely-mounted power unit 50 of a configuration in which a power source 51 and a speed reduction gear 52 are arranged in a vehicle width direction and are connected to each other, is accommodated in a power unit accommodating chamber, and that the power unit 50 is supported on a vehicle body by at least a power-source-side mount 64 and a speed-reduction-gear side mount 65 respectively disposed on both of left and right sides in the vehicle width direction of the power unit 50. The left and right side mounts 64 and 65 are disposed at a position higher than a position of the center Gc of gravity of the power unit. A spring axis line Vr1 of the power-source side mount 64 and a spring axis line Vr2 of the speed-reduction-gear side mount 65 are inclined to intersect with each other at a position higher than the position of the center Gc of gravity of the power unit when the vehicle is viewed from front.

Abstract: The present invention provides a friction stir welder that includes a stage on which at least two material pieces to be welded are mounted and stacked, a pressing member that covers and presses end faces of the material pieces to be welded that are mounted and stacked on the stage, and a rotary tool that is inserted into the stacked material pieces to be welded while rotating, so that a plastic flow is generated at an interfacing portion as well as in the vicinity thereof between the rotary tool and the material pieces to be welded, thereby to joint the material pieces to be welded to each other.

Abstract: A vehicle power unit support structure supports a transversal-type power unit having a power source and transmission coupled with each other in a juxtaposed relation in a width direction of the vehicle. The power unit support structure includes a power source mount provided on an end portion of the power source, and a transmission mount disposed on an end portion of the transmission. As viewed from the front of the vehicle, respective spring axis lines of the power source mount and transmission mount are inclined to intersect with each other at a point higher than the center of gravity of the power unit.

Abstract: A friction stir welding apparatus and a method of operating the friction stir welding apparatus are disclosed. The friction stir welding apparatus includes a rotary tool whose extremity constitutes a probe, a retaining arm which supports the rotary tool, and a roller provided at a position of the retaining arm opposite the rotary tool. The method includes adjusting the retaining arm so as to position workpieces between the rotary tool and the roller while adjusting the roller to turn in a direction where a joint line of the workpieces extends, rotating the rotary tool and lowering the probe until the probe presses the workpieces, gradually inserting the probe into the joint line, and moving the probe along the joint line.

Abstract: A main liquid chamber and a secondary liquid chamber are formed on both sides of an engine side mounting member to interpose the engine side mounting member. A rubber is vulcanized and molded integrally with the engine side mounting member. A car body side mounting member is injection molded of resin material in a state where the rubber, a pipe for molding a communication hole and the caulk fittings for caulking and fixing a lid member for closing an opening portion leading to one of the main liquid chamber and the secondary liquid chamber and provided in the car body side mounting member are disposed within an injection mold.

Abstract: A rubber 12 is vulcanized and bonded integrally with an engine side mounting member 11 and a barrel member 14 for caulking and fixing a diaphragm 16. A car body side mounting member 13 is formed by injection molding a resin material on the outer circumference of the rubber 12. A seal is provided between the barrel member 14 and the diaphragm 16 by caulking the peripheral edge part of the diaphragm 16 with the barrel member 14.