Steering column and steering apparatus including the same

1. A steering column disposed in a steering apparatus comprising a housing cover connected to a drive unit housing and a bearing disposed in the housing cover, the steering column comprising:

a main body elongated in one direction and having one side inserted into and supported by the housing cover;

an enlarged diameter portion formed as one side of the main body expands in diameter; and

a through-hole penetratively formed in an outer periphery of the enlarged diameter portion so as to be coupled to the housing cover;

wherein the enlarged diameter portion further comprises:

a first enlarged diameter portion facing an outer peripheral surface of the bearing; and

a second enlarged diameter portion having a smaller inner peripheral surface than the first enlarged diameter portion and having the through-hole.

2. The steering column of claim 1 , wherein at least a part of an inner portion of the enlarged diameter portion is disposed to face the outer peripheral surface of the bearing.

3. The steering column of claim 2 , wherein the

second enlarged diameter portion has a diameter that decreases from the first enlarged diameter portion toward the other side of the main body.

4. The steering column of claim 1 , wherein one end of the enlarged diameter portion is curled.

5. A steering apparatus configured to transmit a rotation of an input shaft, which is manipulated by a steering wheel, to an output shaft connected to a drive unit housing, the steering apparatus comprising:

a housing cover in which one side of the input shaft is disposed;

a bearing configured to support a rotation of the input shaft disposed in the housing cover; and

a steering column having one side disposed between the bearing and the housing cover and having a hollow portion therein, the steering column having an inner surface spaced apart from an outer periphery of the input shaft,

wherein the steering column further comprises an enlarged diameter portion having one side disposed in the housing cover and expanding in diameter,

wherein the steering column further comprises a through-hole penetratively formed in an outer peripheral surface of the enlarged diameter portion, and

wherein the enlarged diameter portion comprises:

a first enlarged diameter portion facing an outer peripheral surface of the bearing; and

a second enlarged diameter portion having the through-hole and having a smaller inner peripheral surface than the first enlarged diameter portion.

6. The steering apparatus of claim 5 , wherein the second enlarged diameter portion is inclined so that an inner diameter thereof decreases toward the other side of the steering column.

7. The steering apparatus of claim 6 , wherein the cover housing comprises:

a first housing support portion formed to surround the first enlarged diameter portion; and

a second housing support portion formed to surround the second enlarged diameter portion and having a smaller inner peripheral surface of the first housing support portion.

8. The steering apparatus of claim 5 , wherein one end of the enlarged diameter portion of the steering column is curled.

9. The steering apparatus of claim 5 , wherein the housing cover is injection-molded.

10. The steering apparatus of claim 9 , wherein the housing cover includes an engineering plastic material.

11. The steering apparatus of claim 5 , wherein the housing cover and the steering column are made of different materials.