Vibration-isolating bush

A vibration-isolating bush comprising:

• a shaft member, an outer cylinder for enclosing the shaft member axially in parallel;
• and a rubbery elastic member interposed between the shaft member and the outer cylinder;
• wherein an intermediate cylinder for enclosing the shaft member axially in parallel is interposed between the shaft member and the outer cylinder;
• the shaft member has its axially central portion formed into a first bulging portion of a spherical zone shape bulging transversely outward, the intermediate cylinder enclosing the first bulging portion has its axially central portion formed into a second bulging portion of a spherical zone shape bulging transversely outward, the second bulging portion has its inner circumference formed into a first spherical recess corresponding to a first spherical bulge of the first bulging portion, and an inner circumference portion of the outer cylinder enclosing the second bulging portion is formed into a second spherical recess corresponding to a second spherical bulge of an outer circumference of the second bulging portion;
• and
• the rubbery elastic member includes an inner elastic portion adhered respectively to an outer circumference of the shaft member containing the first spherical bulge and to an inner circumference of the intermediate cylinder containing the first spherical recess, thereby to connect the shaft member and the intermediate cylinder, and an outer elastic portion adhered respectively to an outer circumference of the intermediate cylinder containing the second spherical bulge and to an inner circumference of the outer cylinder containing the second spherical recess, thereby to connect the intermediate cylinder and the outer cylinder, and the inner elastic portion is formed to have a larger axial size than that of the outer elastic portion.