Tubular vibration isolation device for motor mount

A tubular vibration isolation device for a motor mount, comprising an inner shaft member and an outer tubular member that are connected by a main body rubber elastomer, wherein

• the main body rubber elastomer comprises a plurality of rubber legs that extend from the inner shaft member toward the outer tubular member to connect the inner shaft member and the outer tubular member to each other,
• in a circumferential interval between the rubber legs adjacent to each other in a circumferential direction, at least one vibration damping protrusion is provided to connect the rubber legs to each other in the circumferential direction, and
• the vibration damping protrusion has an axial dimension that is configured to be larger than a circumferential dimension at a portion located in the circumferential interval between the rubber legs.

A tubular vibration isolation device for a motor mount, comprising an inner shaft member and an outer tubular member that are connected by a main body rubber elastomer, wherein

• the main body rubber elastomer comprises a plurality of rubber legs that extend from the inner shaft member toward the outer tubular member to connect the inner shaft member and the outer tubular member to each other,
• the rubber leg is provided with at least one vibration damping protrusion that protrudes on a surface, and
• the vibration damping protrusion extends in a connecting direction of the rubber leg.

A tubular vibration isolation device for a motor mount, comprising an inner shaft member and an outer tubular member that are connected by a main body rubber elastomer, wherein

• the main body rubber elastomer is provided with at least one vibration damping protrusion that protrudes on a surface and is located at an intermediate portion separated from both the inner shaft member and the outer tubular member in a radial direction, and
• the vibration damping protrusion constitutes a first vibration damping part and a second vibration damping part with natural frequencies different from each other.

A tubular vibration isolation device for a motor mount, comprising an inner shaft member and an outer tubular member that are connected by a main body rubber elastomer, wherein

• the main body rubber elastomer is provided with at least one vibration damping protrusion that protrudes in an axially outward direction on a surface of an axial end, and
• the vibration damping protrusion comprises a mass part that is configured to be thick at a tip portion of a protruding direction.