Tokai Rubber Industries, Ltd.

Toyota Jidosha Kabushiki Kaisha

Sumitomo Riko Company Limited

Satoru Hibi

Kentaro Mori

Takayoshi Yasuda

Nobuya Yoshida

Akio Saiki

Naoki Furumachi

Chiyaki Inoue

Hiroshi Miya

Masahiro Ohnishi

Shingo Suzuki

Mitsuhiro Takayanagi

A fluid-filled vibration damping device including: first and second mounting members elastically connected by a main rubber elastic body; a tubular fitting member externally slipped around the second mounting member and drawn so as to be externally fitted thereto in a fluid-tight manner; a sealing rubber layer fixed to at least one of an outer peripheral face of the second mounting member and an inner peripheral face of the tubular fitting member so as to be compressed therebetween about an entire circumference; and at least one pressure-relieving lip protruding from the sealing rubber layer and extending toward openings of the second mounting member and the tubular fitting member so as to be pressed against one of the outer peripheral face of the second mounting member and the inner peripheral face of the tubular fitting member in a direction of protrusion.

Fluid-filled vibration damping device and method of manufacturing the same

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 includes an elastic body elastically connects a first mounting member and a cylindrical second mounting member bonded to opposite side thereof; a diaphragm supported by the second mounting member so that the diaphragm cooperates with the elastic body to define therebetween a fluid chamber; and a partition member supported by the second mounting member so that the partition member divides the fluid chamber into a primary fluid chamber and an auxiliary fluid chamber which are held in communication through an orifice passage defined by an orifice-defining member having a movable rubber plate disposed in its central hole. The surface of the orifice-defining member is coated at a primary-fluid-chamber-defining area by a coating rubber layer, thereby minimizing noises caused by bubbles in the fluid chamber.

Fluid-filled vibration-damping device

A fluid-filled vibration-damping device including an elastic body elastically connecting a first and a second mounting member to fluid-tightly close one open-end of the second mounting member, and mutually assembled a movable rubber plate bonded to a first support member and a flexible rubber layer bonded to a second support member are fluid-tightly fixed to the other open-end of the second mounting member by caulking such that the movable rubber plate cooperate with the elastic body to form a primary fluid chamber and the movable rubber plate and the flexible rubber layer cooperate to form an auxiliary fluid chamber, which are filled with a non-compressible fluid and connected together through an orifice passage. A partition member disposed in the auxiliary fluid chamber divides the auxiliary fluid chamber into an intermediate chamber partially defined by the movable rubber plate and an equilibrium chamber partially defined by the flexible rubber layer, which are connected together through a fluid passage, and includes an engaging piece extending toward and being engaged with the first or second support members to be provisionally fixed to the member upon assembly of the partition member. A method of producing the same is also disclosed.

Fluid-filled vibration-damping device and method of producing the same

A cylinder-shaped vibration isolator includes an installation fitting, an inner cylinder-shaped fitting, a rubber elastic supporter, and elastic stoppers. The installation fitting includes a cylinder-shaped installation member. The rubber elastic supporter includes opposite elongation leading ends, extensions, and opposite leading end surfaces. The opposite elongation leading ends have a leading end surface. The extensions are extended from the opposite elongation leading ends in opposite circumferential directions substantially, and have a leading end surface. The opposite leading end surfaces are shared by the leading end surfaces of the opposite elongation leading ends and the extensions, are dented in a centripetal direction as a concaved curvature configuration, and are pressed against the inner periphery of the cylinder-shaped installation member. Because the opposite leading end surfaces of the opposite extension leading ends and the extensions are formed as a concaved curvature configuration, they are hardly separated from the inner periphery of the cylinder-shaped installation member even when a large rolling load is input into the cylinder-shaped vibration isolator. Thus, there scarcely arise the problems resulting from the separation, such as wear on the leading end surfaces of the opposite elongation leading ends and the extensions, and the foreign materials held between the leading end surfaces and the inner periphery of the cylinder-shaped installation member.

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Ichinomiya, Japan

Satoru Hibi