Toyo Tire Rubber Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

The Toyo Rubber Industry Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Kaisha Toyota Jidosha Kabushiki

Motoo Kunihiro

Katsunori Makibayashi

Kenji Murase

Zenji Nakajima

Shuichi Okamoto

Yutaka Mizutani

Masahiro Ishigaki

Naoki Yamaguchi

Kouichi Mori

Tomiaki Atsumi

Osamu Kuroda

Kouji Sawada

Kazumasa Kuze

Kazumasa Kuse

Shigeru Haino

Yuuichi Sakabe

Kiyonobu Nariai

Satoshi Itoh

Hiroyuki Fujioka

Takashi Akimoto

Liquid enclosing type vibration isolating mount

A liquid filled vibration isolating mount has a rigid tubular fitting defining an interior fitting cavity, an upper opening and a lower opening. A vibration isolating base body formed of elastic material is fitted in the upper opening of the rigid tubular fitting. A diaphragm seals the lower opening of the rigid tubular fitting and a partition is disposed in the interior fitting cavity of the rigid tubular fitting between the vibration isolating base body and the diaphragm to divide the interior fitting cavity into a first liquid chamber and a second liquid chamber. The first liquid chamber has a first liquid chamber wall formed at least in part by the vibration isolating base body, the partition and the rigid tubular fitting. The second liquid chamber has a second liquid chamber wall formed at least in part by the diaphragm and the partition. The partition defines an orifice communicating the first and the second liquid chambers with each other. The rigid tubular fitting forms at least a portion of a side wall of the first liquid chamber wall and defines at least one opening in the side wall. An elastic membrane cup covers each of the at least one side wall opening and has a convex surface projecting into the first liquid chamber and a concave surface defining an air chamber separated from the first liquid chamber by the elastic membrane cup and extending into the interior fitting cavity. The air chamber may be sealed or open to the atmosphere.

A liquid filled vibration isolating mount has upper and lower metal fittings for fixing the vibration isolating mount to a supporting body and a supported body. A rubber vibration isolating body has a tubular shape defining a central cavity and has upper and lower ends defining an upper face and a bottom face which are respectively fixed to the upper and lower metal fittings. The upper metal fitting defines an aperture communicating with the central cavity and a partition member is connected to the upper metal fitting occluding the aperture. A diaphragm is attached to the upper metal fitting covering at least a portion of the partition member. The central cavity of the vibration isolating base body and the partition member define a first liquid chamber wherein the vibration isolating base body constitutes a portion of a chamber wall. The diaphragm and the partition member define a second liquid chamber. The second liquid chamber is partitioned from the first liquid chamber by the partition member and the partition member defines an orifice communicating the first liquid chamber with the second liquid chamber. A rubber elastic membrane is connected to the lower metal fitting and forms a portion of the chamber wall of the first liquid chamber. The rubber elastic membrane has an inversed cup shape projected from the bottom face of the vibration isolating base body into the first liquid chamber and the inversed cup shape forms an air chamber within itself.

An exhaust pipe supporting device includes a generally elliptical body portion integrally formed of an elastic material, such as rubber. The body portion includes a first holder portion having a through-hole to receive a support member associated with a car body, a second holder portion having another through-hole to receive a support member associated with the exhaust pipe. A pair of lateral walls connect the first and second holder portions by attachment at opposite ends to opposed sides of the first and second holding portions. The first and second holding are held in this manner in spaced apart relation to each other, and a central connector is disposed intermediate between the first and second holder portions and connected at opposite sides thereof to the lateral walls. The central connector portion includes a central portion formed as a mass section, which optionally includes a metal mass portion, and opposite lateral portions which extend from the mass section to the opposite sides. The mass section is heavier than the opposite portions, the latter which are bifurcated to provide branch portions advantageously diverging at a branch angle in a range between 30 and 60 degrees.

Exhaust pipe supporting device

A liquid-sealed body mount comprising an inner and an outer cylinders concentrically disposed, a first and a second rubber members provided mutually in axially spaced relation and connecting both cylinders therebetween, an intermediate rubber plate means partitioning axially an enclosure surrounded by both cylinders and both rubber members into a first and a second liquid chambers, an orifice for communication with both chambers apertured in the intermediate means, and a liquid filled in both chambers. The intermediate rubber plate means is configured, when assembled, so as to be preliminarily deformed in the shearing direction, assuming a shade-like form and, when imposed with a prescribed load, so as to retain a neutral state of intersecting orthogonally both cylinders, whereby equalized vibration-preventing characteristics against oscillations on both bound and rebound sides are achieved.

Liquid-sealed body mount

This invention relates to a vibration-preventing device wherein a partition wall is positioned outside of an inner cylinder and is interposed between an upper plate and a lower plate. The partition wall includes a hub portion. The upper plate and lower plate are connected to the inner cylinder. An upper vibration-preventing rubber member and an upper elastic film are interposed between the partition wall and the upper plate and cooperate to define an enclosure which functions as an upper damper liquid chamber. A lower vibration-preventing rubber member and a lower elastic film are interposed between the partition wall and the lower plate and cooperate to form an enclosure which functions as a lower damper liquid chamber. The upper damper liquid chamber communicates with the lower damper liquid chamber through an orifice. An elastic element in a cylindrical form or the like is interposed between confronting parts of an outer peripheral surface of the inner cylinder and an inner peripheral surface of the hub of the partition wall.

Vibration-preventing rubber device

A fluid-damping vibration-isolating support device comprising a main support body having a rubber base member and a closed enclosure internally thereof; and a partition plate dividing the enclosure into two chambers which intercommunicate through an orifice and are filled with a liquid. The partition plate comprises a separator member and a stopper member. The separator member is formed of an outer peripheral thick wall portion having an orifice and an inner thin flat plate portion having at least one through-hole. The stopper member has two opposed plate sections provided so as to cover the through-hole and is captured to the separator member slightly movably to the degree that the plate sections are in contact with or separate from both faces of the flat plate portion. The stopper member serves to close upon low frequency vibration and open upon high frequency vibration, so that in the high frequency region rise of hydraulic pressure can be suppressed and dynamic spring rate can be lowered.

Fluid-damping vibration-isolating support device

This invention relates to a vibration-preventing rubber device in which a partition wall having a hub is positioned outside an inner cylinder and is interposed between an upper plate and a lower plate which are connected to the inner cylinder. An upper vibration-preventing rubber member is interposed between the partition wall and the upper plate and cooperates with the partition wall and the upper plate to define an upper damper liquid chamber. A lower vibration-preventing rubber member is interposed between the partition wall and the lower plate and cooperates with the partition wall and the lower plate to define a lower damper liquid chamber. The upper damper liquid chamber communicates with the lower damper liquid chamber through an orifice. The orifice is formed from a long curved pipe in the shape of a helix or the like.

This invention relates to a multiple mounting vibration-preventing device wherein a partition wall is interposed between an upper plate and a lower plate. An upper vibration-preventing rubber member is interposed between the partition wall and the upper plate so as to define an upper damper liquid chamber therebetween. A lower vibration-preventing rubber member is interposed between the partition wall and the lower plate so as to define a lower damper liquid chamber therebetween. The upper damper liquid chamber communicates with the lower damper liquid chamber through an orifice. Either or both the upper damper liquid chamber and the lower damper liquid chamber is horizontally divided into a plurality of damper liquid subschambers by division plates extending in the vertical direction of the damper liquid chambers. Adjacent damper liquid subchambers communicate through orifices provided in the division plates.

This invention relates to multiple mounting vibration-preventing device wherein a partition wall is interposed between an upper plate and a lower plate. An upper vibration-preventing rubber member is interposed between the partition wall and the upper plate so as to define an upper damper liquid chamber therebetween. A lower vibration-preventing rubber member is interposed between the partition wall and the lower plate so as to define a lower damper liquid chamber therebetween. The upper damper liquid chamber communicates with the lower damper liquid chamber through an orifice. An upper elastic film, disposed inside the upper vibration-preventing rubber member, has a portion spliced to the partition wall and its outer end part caulked to the upper plate. The upper damper liquid chamber is defined by the upper vibration-preventing rubber member and the upper elastic film. A lower elastic film, disposed inside the lower vibration-preventing rubber member, has a portion spliced to the partition wall and an outer end part caulked to the lower plate. The lower damper liquid chamber is defined by the lower vibration-preventing rubber member and the lower elastic film.

Vibration preventing device

A rubber vibration insulator comprising a boss member as one fitting, a tubular body, an annular elastic member interposed between the boss member and one end of the tubular body, a plate member as the other fitting surrounding fixedly the opposite end of the tubular body, thus forming together with the aforesaid elements a sealed chamber having variable volume, and a capsule housed in the sealed chamber, in which a damping liquid is filled. The capsule comprises an external shell consisting of a rubber plate having an orifice and a plate body joined together and a diaphragm disposed transversely in the shell, thereby dividing its internal chamber into an air sub-chamber on the rubber plate side and a liquid sub-chamber on the plate body side. The rubber plate of the shell may be defined with recesses on both sides in a vertical symmetry and dispersedly to form thin film portions or be in the form of a thin rubber plate which is interposed between two porous plates at a clearance and play between them. With the arrangement of the capsule, the spring rate of the diaphragm can be lessened and the liquid pressure in the sealed chamber can be prevented from rising in the high frequency region. Thus, muffled sounds and transmission sounds are insulated.

Rubber vibration insulator

A vibration-absorbing engine mounting device with fluid damping which comprises: an upper mounting member, a lower mounting member, a rubber wall body interposed between both the mounting members with its upper and lower portions being air-tightly bonded to the upper and lower mounting members, respectively, a block damper transversely provided in the rubber wall body, and a capsule encased in a space enclosed by the former four members, thus defining a closed chamber enclosed by the former five members. The capsule comprises an exterior rigid case, an interior sealed bag encapsulated in the rigid case, defining a sacciform chamber and an orifice member entering the former two. The closed chamber and the sacciform chamber are filled with fluid, whereby they are put in communication with one another by the passage of fluid via the orifice member.

Vibration-absorbing mounting device with hydraulic damping, especially

A rubber bearing device having air damping capacity which comprises upper and lower fitments;

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Tsu, Japan

Motoo Kunihiro