Abstract: A sub-frame 11 of a vehicle, which is made by means of die casting into a substantially rectangular shape and attached to a front lower portion 14 of a vehicle body 13, includes: a C-shaped front sub-frame 15; and a C-shaped rear sub-frame 16, wherein a right and a left front beam members 65, 67, which are formed at a right and a left end portion of a front beam member 47 constituting the front sub-frame 15, and a right and a left beam rear members 96, 97, which are formed at a right and a left end portion of a rear beam member 53 constituting the rear sub-frame 16, are joined to each other, and flat portions 113, 114 are formed in the right and the left front beam members 65, 67 so that the flat portions can be start points of plastic deformation of the sub-frame 11 when a load, which is heavier than a normal load, is given to the sub-frame 11 in the longitudinal direction.

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 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: 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 vehicular power unit mount structure having a first mounting member for attachment to a power unit and a second mounting member elastically connected to the first mounting member for attachment to a vehicle body. The mount structure includes an elastic waterproofing cover having an axial displacement stopper and a radial displacement stopper. The axial displacement stopper is engageable with an end of a tubular portion of the second mounting member to elastically absorb impact shock and eventually stop movement of a shaft portion of the first mounting member when the shaft portion is displaced in an axial direction toward the second mounting member. The radial displacement stopper is engageable with an inner cylindrical surface of the tubular portion to elastically absorb impact shock and eventually stop movement of the shaft portion when the shaft portion is displaced in a radial direction relative to the second mounting member.

Abstract: An engine mount mounts a motive power source to a vehicle body. The engine mount includes an inner cylindrical member attached to the motive power source, and a resinous bracket attached to the vehicle body. The inner cylindrical member is elastically connected to the bracket. The bracket includes a cold shut portion and a weak portion provided at the cold shut portion. The cold shut portion is formed when the bracket is molded from molten resin. The weak portion has such a small strength that, when the vehicle body collides with some object, the bracket is fractured to absorb the collision.

Abstract: A transmission mount structure for mounting a transmission connected to an end of a transverse-mounted engine to a vehicle body includes an elastic main vibration-damping member for reducing both vibrations in a vertical direction and vibrations in a roll direction, and an elastic auxiliary vibration-damping member smaller in diameter or thickness than the main vibration-damping member and extending in a direction substantially perpendicular to the roll direction. The auxiliary vibration-damping member has a constricted portion formed at a longitudinal central portion thereof and having a smaller cross-section than any other part of the auxiliary vibration-damping member.

Abstract: An engine mount mounts a motive power source to a vehicle body. The engine mount includes an inner cylindrical member attached to the motive power source, and a resinous bracket attached to the vehicle body. The inner cylindrical member is elastically connected to the bracket. The bracket includes a cold shut portion and a weak portion provided at the cold shut portion. The cold shut portion is formed when the bracket is molded from molten resin. The weak portion has such a small strength that, when the vehicle body collides with some object, the bracket is fractured to absorb the collision.

Abstract: A vehicular power unit mount structure (33) having a first mounting member (51) for attachment to a power unit and a second mounting member (52) elastically connected to the first mounting member for attachment to a vehicle body includes at least one projection (66) protruding from a flange (62) of the second mounting member (52) toward the vehicle body and located at a position offset from a line connecting centers of attachment holes (64, 64) of the flange to ensure that the flange (62) of the second mounting member (52) and the vehicle body are forced together via the projection (66).

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.

Abstract: A main liquid chamber 26 and a secondary liquid chamber 27 are formed on both sides of an engine side mounting member 11 to interpose the engine side mounting member 11. A rubber 13 is vulcanized and molded integrally with the engine side mounting member 11. A car body side mounting member 12 is injection molded of resin material in a state where the rubber 13, a pipe 17 for molding a communication hole 17a and the caulk fittings 22, 22 for caulking and fixing a lid member 21 for closing an opening portion 19 leading to one of the main liquid chamber 26 and the secondary liquid chamber 27 and provided in the car body side mounting member 12 are disposed within an injection mold 45.

Abstract: A vehicular power unit mount structure (33) having a first mounting member (51) for attachment to a power unit and a second mounting member (52) elastically connected to the first mounting member for attachment to a vehicle body includes at least one projection (66) protruding from a flange (62) of the second mounting member (52) toward the vehicle body and located at a position offset from a line connecting centers of attachment holes (64, 64) of the flange to ensure that the flange (62) of the second mounting member (52) and the vehicle body are forced together via the projection (66).

Abstract: A transmission mount structure for mounting a transmission connected to an end of a transverse-mounted engine to a vehicle body includes an elastic main vibration-damping member for reducing both vibrations in a vertical direction and vibrations in a roll direction, and an elastic auxiliary vibration-damping member smaller in diameter or thickness than the main vibration-damping member and extending in a direction substantially perpendicular to the roll direction. The auxiliary vibration-damping member has a constricted portion formed at a longitudinal central portion thereof and having a smaller cross-section than any other part of the auxiliary vibration-damping member.

Abstract: A vehicular power unit mount structure having a first mounting member for attachment to a power unit and a second mounting member elastically connected to the first mounting member for attachment to a vehicle body includes an elastic waterproofing cover having an axial displacement stopper engageable with an end of a tubular portion of the second mounting member to elastically absorb impact shock and eventually stop movement of a shaft portion of the first mounting member when the shaft portion is displaced in an axial direction toward the second mounting member, and a radial displacement stopper engageable with an inner cylindrical surface of the tubular portion to elastically absorb impact shock and eventually stop movement of the shaft portion when the shaft portion is displaced in a radial direction relative to the second mounting member.

Abstract: A clearance which is not filled with a vibration-proof member is provided between an inner cylinder and an outer cylinder. A stopper member which is made of an elastic member is disposed in this clearance. When the amount of relative displacement, in the diametrical direction, of the inner and outer cylinders has exceeded a predetermined value, the stopper member is elastically deformed. A clearance in the axial direction is secured between the stopper member and that portion of the vibration-proof member which connects the inner cylinder and the outer cylinder. In this manner, a function of switching the spring constant can also be obtained in a solid type of mount without a perforation in the vibration-proof member which is made of an elastic member to connect the inner cylinder and the outer cylinder.