Stopper for cylindrical elastic mount and cylindrical elastic mount assembly

A stopper for a cylindrical elastic mount assembled to a first axial end of the cylindrical elastic mount including a shaft member fixed to a first member, an outer cylindrical member that is fixed to a second member connected to the first member in a vibration damping fashion and that is disposed radially outwardly of the shaft member with a predetermined radial distance therebetween, and a main elastic rubber body interposed between the shaft member and the outer cylindrical member for elastic connection therebetween,

• the stopper comprising:
• a stopper fitting with a cylindrical shape having a bottom on one side thereof and opening toward a second axial end of the cylindrical elastic mount in the state of being assembled thereto, the stopper fitting having a cylindrical portion disposed radially outwardly of the shaft member with a predetermined radial distance therebetween;
• an outward flange formed integrally along a periphery of an opening-side end of the cylindrical portion;
• and a bottom portion supported by the shaft member;
• a first rubber portion fixedly disposed on the outward flange of the stopper fitting and protruding toward the opening of the cylindrical portion of the stopper fitting, the first rubber portion being brought into contact with the outer cylindrical member or the second member to which the outer cylindrical member is fixed, so as to limit an amount of an axial relative displacement between the outer cylindrical member and the shaft member;
• and
• a plurality of second rubber portions fixedly disposed on the bottom portion of the stopper fitting and protruding higher than the first rubber portion toward the opening of the cylindrical portion, each of the plurality of second portions being elastically deformed so as to allow the axial relative displacement between the outer cylindrical member and the shaft member until the outer cylindrical member or the second member is abutted against the first rubber portion in a state where each of the plurality of second portions is in contact with the outer cylindrical member or the second member,
• wherein a concave portion is formed at each of a plurality of locations on a circumference of the cylindrical portion of the stopper fitting, the concave portion being concaved in a radially inward direction to partially enlarge a width of the outward flange so as to provide a large width portion on the enlarged width portion of the outward flange of the first rubber portion, while each of the plurality of second portions is fixedly disposed only between adjacent concave portions in a circumferential direction of the bottom portion, and
• wherein a groove-shaped gap for separating the first and each of the plurality of second portions is provided so as to continuously extend around each of the plurality of second portions.