Toyota Jidosha Kabushiki Kaisha

Toyo Tire Rubber Co., Ltd.

Tokai Rubber Industries, Ltd.

Toyo Tire Corporation

Sumitomo Riko Company Limited

Nobuya Yoshida

Hiroshi Miya

Tatsuki Ikawa

Hiroyuki Ichikawa

Yukio Takashima

Takayoshi Yasuda

Akio Saiki

Katsuhiro Sakurai

Yosei Kodama

Masahiro Ohnishi

Kentaro Mori

Kentaro Yamamoto

Yuichi Ogawa

Takashi Miyake

Naoki Furumachi

Kenichi Tsuchiya

Masashi Takaoka

Satoru Hibi

Tetsuya Itoh

Shingo Suzuki

Kazumasa Kuze

Seiichi Hamate

Toshiyuki Kitano

Yusuke Sugita

Masahiko Takashima

Satoshi Tatsumi

Hideki Murata

Jiro Iwashiro

An antivibration device capable of restraining a stopper rubber from being turned up when a connecting member is inserted between a first attached member and a displacement restriction member. A stopper rubber is mounted on a surface of a connecting member opposite to a first attached member and includes a mounted portion brought into abutment on a displacement restriction member when the connecting member is displaced in a rebound direction, and a hook portion formed at the outer edge of the mounted portion. The connecting member includes an engaged portion (protrusion) engaged with the hook portion. Thus, when the connecting member is inserted between the first attached member and the displacement restriction member, the stopper rubber (the mounted portion) can be restrained from being turned up.

Antivibration device

An antivibration device capable of simplifying its manufacturing process with an antivibration base body being precompressed. A first attached member includes an upright portion upstanding toward a displacement restriction member, and when a second attached member is retained on a retainer member with an antivibration base body being precompressed, the interposition of the upright portion enables a space into which one side of a connecting member is insertable, to be formed between the first attached member and the displacement restriction member. Thus, after the completion of a step (for example, a press-fitting step) of retaining the second attached member of a mount body on the retainer member, the one side of the connecting member is inserted into the space between the first attached member and the displacement restriction member to be fixedly fastened to the first attached member.

An antivibration device capable of securing a thickness dimension of a stopper rubber without changing a gap between a connecting member and a stopper wall portion. A connecting member includes a base surface and a receding surface located to recede beyond the base surface in a direction to go away from a stopper wall portion, the base surface and the receding surface face the stopper wall portion, and a stopper rubber includes an inner fitting portion at which the connecting member is internally fitted. Thus, it is possible to secure a thickness dimension of the stopper rubber without changing a gap between the connecting member and the stopper wall portion.

A suspension system for an engine includes an engine mount and an electronic control unit. The engine mount has spring characteristics that are switchable between first spring characteristics and second spring characteristics. The electronic control unit is configured to switch the spring characteristics of the engine mount to the first spring characteristics when the rotational speed of the engine is lower than a predetermined rotational speed, and torque of the engine is equal to or larger than a predetermined torque. The electronic control unit is configured to switch the spring characteristics of the engine mount to the second spring characteristics when the rotational speed of the engine is lower than the predetermined rotational speed, and the torque of the engine is smaller than the predetermined torque.

Engine suspension system

A first engine mount unit sharing no distributed load of a power unit includes: a power unit side bracket attached to the power unit; a vehicle body side bracket attached to a vehicle body; and a mount rubber provided between the power unit side bracket and the vehicle body side bracket. At attachment portions of the power unit side bracket and the vehicle body side bracket of the first engine mount unit, a bolt hole is provided in an inner cylinder part adhered to the mount rubber pressed into the power unit side bracket, to adjust variations in the height direction (H direction) of the vehicle, while bolt holes are provided in the vehicle body side bracket to adjust variations in the width direction (W direction) of the vehicle.

Vehicle including engine mount units

An engine mount for use in a power unit vibration damping support structure configured to be mounted on a transmission side in a state without a distributed support load of a weight of the power unit being applied, the engine mount including: an inner shaft member; an outer tube member arranged separated to an outer circumference side of the inner shaft member; and a main rubber elastic body fixed to the inner shaft member while being attached to the outer tube member non-adhesively such that the inner shaft member and the outer tube member are elastically connected by the main rubber elastic body, wherein the outer tube member is configured to be attached to the power unit, and the inner shaft member is configured to be attached to a vehicle body.

Engine mount and power unit vibration damping support structure

A vibration damping device including: an inner shaft member; a main rubber elastic body fixed to an outer circumference surface of the inner shaft member; and an outer bracket attached to an outer circumference surface of the main rubber elastic body. At least one locking projection formed to an inner circumference surface on a bracket main unit provided to the outer bracket is inserted and locked in a circumference direction in at least one locking groove formed on the outer circumference surface of the main rubber elastic body. The main rubber elastic body is held between axially opposed surfaces of an abutting protruding part formed on one axial end of the bracket main unit and a retaining protruding part formed on a press fit metal fitting press fit and fixed to another axial end of the bracket main unit.

Vibration damping device

A fluid-filled vibration damping device including: a pressure-receiving chamber and an equilibrium chamber disposed on either side of a partition plate, while being connected through a first orifice passage; a moveable film arranged to either a pressure-receiving chamber side or an equilibrium chamber side of the partition plate while being spaced away therefrom to define therebetween an intermediate chamber; a second orifice passage connecting the intermediate chamber and one of the pressure-receiving and the equilibrium chambers while being tuned to higher frequency than the first orifice passage; and a flow straightening plate arranged in opposition to the moveable film at least at one of the intermediate chamber side and an opposite side thereof, the flow straightening plate having a plurality of flow straightening apertures opening towards the moveable film and furnished with a flow limiting member.

Fluid-filled vibration damping device

To provide a liquid enclosing type vibration isolating apparatus capable of achieving two resonance characteristics by one orifice path, in a liquid enclosing type vibration isolating apparatus including a main liquid chamber a portion of a chamber wall of which is constituted by a vibration isolating base member, an auxiliary liquid chamber a portion of a chamber wall of which is constituted by a first diaphragm, and an orifice path for communicating the main liquid chamber and the auxiliary liquid chamber, an orifice member forming the orifice path is provided with a partition wall for partitioning the orifice path and the auxiliary liquid chamber, and a portion of the partition wall is constituted by a second diaphragm constituted by a flexible rubber-like elastic film facing the auxiliary liquid chamber.

Liquid enclosing type vibration isolating apparatus

An electrically conductive roll includes a center shaft, an electrically conductive elastic layer formed on an outer circumferential surface of the center shaft, and a resistance adjusting layer formed radially outwardly of the electrically conductive elastic layer. The resistance adjusting layer is formed of a rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds, at least one electron-conductive agent, at least one ion-conductive agent, and at least one electrically insulating filler. The thermoplastic resin, the at least one electron-conductive agent, the at least one ion-conductive agent, and the at least one electrically insulating filler are included in the rubber composition in respective amounts of 3-40 parts by weight, 10-150 parts by weight, not greater than 2 parts by weight, and 20-80 parts by weight, per 100 parts by weight of the rubber material.

Conductive roll

A switchable liquid-filled vibration absorbing mount has a stopper device interposed between a first diaphragm and a bottom portion for regulating downward movement of pushing member when a vacuum is introduced into a switching chamber, so that a protrusion of a valve member does not come out of an inner orifice when a vacuum is applied to the switching chamber to move the first diaphragm to a first position opening the orifice.

Switchable liquid-filled vibration absorbing mount

This invention provides a switching type liquid-in vibration isolating device capable of opening/closing an orifice by changing over between the atmospheric and negative pressure in a switching chamber corresponding to shake and idle vibration, respectively. In order to prevent a pipe, for introducing the atmospheric and negative pressure in the switching chamber, from disconnecting, a first and a second fitting are connected by a vibration isolating substrate , a partition member , a first and a second diaphragm are disposed within a hollow space thereof, a main liquid chamber and a sub-liquid chamber are interconnected by two inside and outside orifices , a equilibrium chamber is formed between the first and second diaphragm , a switching chamber is formed between the second diaphragm and the second fitting , the center portion of the bottom wall of the second fitting is depressed toward the switching chamber , a pipe is pierced into the top of the depressed portion and received in the depressed portion , and a plurality of convex portions for interference prevention are outwardly projectively provided on the bottom wall around the depressed portion

Switching type liquid-in vibration isolating device

An engine mount includes an inner member and an outer cylinder having a circumferential position around a central axis of the engine mount, the circumferential position being changeable relative to the inner member. A bracket fixed to the inner member supports an engine on the engine mount, the bracket having a circumferential position around the central axis of the engine mount which is changeable relative to the outer cylinder. A stopper of an elastic material is provided on one of the outer cylinder and the inner member, the stopper contacting the other of the outer cylinder and the inner member when a change in length of one of the outer cylinder and the inner member relative to the other exceeds a reference level. An interconnecting member of an elastic material exerts a pressing force on the outer cylinder and the inner member such that the other of the outer cylinder and the inner member is contacted by the stopper to prevent the change in length of one of the outer cylinder and the inner member from further increasing from the reference level. A reference position indicating unit indicates whether the circumferential positions of the outer cylinder and the bracket relative to each other around the central axis of the engine mount are reference positions.

Growing community of inventors

Toyota, Japan

Nobuya Yoshida