Movable object

1. A movable object, comprising:

a steering part including a wheel provided to rotate along a ground, a wheel rod connected to the wheel and extending in a direction away from the wheel, and a steering motor connected to the wheel rod to rotate the wheel rod and steer the wheel; and

a cover part disposed on top of the steering part, and including a receiving member in which a portion of the steering part is received,

wherein when the steering motor rotates the wheel rod in one direction, the steering part is engaged with the receiving member so that the steering part and the cover part are joined, and

when the steering motor rotates the wheel rod in an opposite direction, the steering part is separated from the receiving member so that the steering part and the cover part are disengaged.

2. The movable object according to claim 1 , wherein:

the steering part further includes an insertion rod connectable to an upper region of the wheel rod and extending from the wheel rod toward the receiving member,

the receiving member has a receiving hole provided in a lower portion of the cover part and allowing the insertion rod to be inserted thereinto,

when the steering motor rotates the wheel rod in the one direction, the insertion rod is inserted into the receiving hole so that the steering part and the cover part are joined, and

when the steering motor rotates the wheel rod in the opposite direction, the insertion rod is separated from the receiving hole so that the steering part and the cover part are disengaged.

3. The movable object according to claim 2 , wherein:

an upper region of the insertion rod has a screw bolt structure, and

the receiving hole has a shape corresponding to that of the bolt structure of the insertion rod.

4. The movable object according to claim 3 , wherein:

the insertion rod has a recess which is concave upward from a portion of a lower region of the insertion rod facing the wheel rod, and

an outer circumferential surface of the upper region of the wheel rod has a shape corresponding to that of an inner circumferential surface of the recess.

5. The movable object according to claim 4 , wherein the steering part further includes a linear motor moving the wheel rod upwardly or downwardly.

6. The movable object according to claim 5 , wherein the linear motor is disposed above the steering motor.

7. The movable object according to claim 3 , wherein the steering part further includes a decoupling member which mediates or blocks power transfer from the steering motor to a lower region of the wheel rod connected to the wheel.

8. The movable object according to claim 4 , wherein:

a first thread structure is provided in the outer circumferential surface of the upper region of the wheel rod, and

a second thread structure corresponding to the first thread structure is provided in the inner circumferential surface of the recess.

9. The movable object according to claim 5 , wherein when the wheel rod is inserted into the recess and the linear motor moves the wheel rod upwardly, the wheel rod presses the insertion rod upwardly due to interference between the wheel rod and the insertion rod and moves the insertion rod upwardly.

10. The movable object according to claim 1 , further comprising a base part disposed between the steering part and the cover part and having a through hole allowing the wheel rod to pass therethrough,

wherein the wheel rod passes through the through hole and is received in the receiving member.