A wheel includes a body (10) having a cylindrical outer circumference; a first ring member (21) provided at one side edge of the body (10) in the form of a protruding ring; a second ring member (22) provided at the other side edge of the body (10) in the form of a protruding ring; a rotation ring (30) located between the first ring member (21) and the second ring member (22) and located out of the body (10) and rotatably coupled thereto; a plurality of pivoting plates (40) coupled to the rotation ring (30) to be pivotal outward and configured to protrude out of the rotation ring (30); a connection member (50) located between the plurality of pivoting plates (40) to connect the first ring member (21) and the second ring member (22) and serve as a stopper for limiting a pivoting range of the pivoting plate (40); a first opening (31) formed at the rotation ring (30) along a rotation direction of the rotation ring (30); a second opening (11) formed at the body (10) at a position corresponding to the first opening (31); a stopper bar (60) configured to be pivotal based on a center portion (C) of the body (10) and provided through the first opening (31) and the second opening (11); and a shock absorber (70) coupled to the body (10) to absorb shock when the stopper bar (60) pivots.

A wheel includes a body (10) having a cylindrical outer circumference; a first ring member (21) provided at one side edge of the body (10) in the form of a protruding ring; a second ring member (22) provided at the other side edge of the body (10) in the form of a protruding ring; a rotation ring (30) located between the first ring member (21) and the second ring member (22) and located out of the body (10) and rotatably coupled thereto; a plurality of pivoting plates (40) coupled to the rotation ring (30) to be pivotal outward and configured to protrude out of the rotation ring (30); a connection member (50) located between the plurality of pivoting plates (40) to connect the first ring member (21) and the second ring member (22) and serve as a stopper for limiting a pivoting range of the pivoting plate (40); a first groove (31) formed at the rotation ring (30) along a rotation direction of the rotation ring (30); a second groove (11) formed at the body (10) at a position corresponding to the first groove (31); a stopper bar (60) configured to be pivotal based on a center portion (C) of the body (10) and provided through the first groove (31) and the second groove (11); and a shock absorber (70) coupled to the body (10) to absorb shock when the stopper bar (60) pivots.