Vibration damping device

Abstract

The present invention relates to a vibration damping device including an outer attachment member ( 10 ) connected to one of a vibration generating part and a vibration receiving part, an inner attachment member ( 20 ) connected to the other, and an elastic body ( 30 ) configured to connect the outer attachment member ( 10 ) and the inner attachment member ( 20 ), wherein the outer attachment member ( 10 ) is formed in a cylindrical shape, the inner attachment member ( 20 ) includes a plate-shaped rigid member ( 21 ) disposed in the outer attachment member ( 10 ) and an interior member ( 28 ) located in the outer attachment member ( 10 ), fixed to the rigid member ( 21 ), and formed of a synthetic resin material, and, at protruding portions ( 22, 23 ) of the rigid member ( 21 ) which protrude outward from the outer attachment member ( 10 ) in an axial direction along a central axis ( 0 ) of the outer attachment member ( 10 ), mounting holes ( 22 a, 23 a ) which are open in a diameter direction orthogonal to the axial direction and have a fastening member configured to connect the protruding portions ( 22, 23 ) and the other of the vibration generating part and the vibration receiving part fitted thereinto are formed.

1 . A vibration damping device comprising:
 an outer attachment member connected to one of a vibration generating part and a vibration receiving part;   an inner attachment member connected to the other; and   an elastic body configured to connect the outer attachment member and the inner attachment member,   wherein:   the outer attachment member is formed in a cylindrical shape;   the inner attachment member includes a plate-shaped rigid member disposed in the outer attachment member and an interior member located in the outer attachment member, fixed to the rigid member, and formed of a synthetic resin material;   at a protruding portion of the rigid member that is protruding outward from the outer attachment member in an axial direction along a central axis of the outer attachment member, a mounting hole that is open in a diameter direction orthogonal to the axial direction and has a fastening member configured to connect the protruding portion and the other of the vibration generating part and the vibration receiving part fitted thereinto is formed; and   a pair of protruding portions are formed on both sides of the rigid member in a width direction with the central axis interposed therebetween, and protrude outward in the diameter direction.   
     
     
         2 . The vibration damping device according to  claim 1 , wherein the interior member covers the rigid member over an entire region in a circumferential direction around a central axis of the outer attachment member. 
     
     
         3 . The vibration damping device according to  claim 1 , wherein a concave portion that is concave in the diameter direction is formed in a portion of the rigid member located in the outer attachment member, and the interior member is fixed to the rigid member by the synthetic resin material being introduced into the concave portion. 
     
     
         4 . The vibration damping device according to  claim 3 , wherein the mounting hole and the concave portion are formed on a surface of the rigid member. 
     
     
         5 . The vibration damping device according to  claim 1 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.   
     
     
         6 . The vibration damping device according to  claim 2 , wherein a concave portion that is concave in the diameter direction is formed in a portion of the rigid member located in the outer attachment member, and the interior member is fixed to the rigid member by the synthetic resin material being introduced into the concave portion. 
     
     
         7 . The vibration damping device according to  claim 6 , wherein the mounting hole and the concave portion are formed on a surface of the rigid member. 
     
     
         8 . The vibration damping device according to  claim 2 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.   
     
     
         9 . The vibration damping device according to  claim 3 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.   
     
     
         10 . The vibration damping device according to  claim 4 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.   
     
     
         11 . The vibration damping device according to  claim 6 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.   
     
     
         12 . The vibration damping device according to  claim 7 , wherein:
 a recessed portion formed to narrow a width of the rigid member is disposed in a portion of the rigid member located in the outer attachment member; and   the interior member is fixed inside the recessed portion.