Steering support beam

1. A steering support beam, comprising:

a cylindrical support beam body;

a plurality of brackets each having a fitting portion externally fitted on the cylindrical support beam body and fixed thereto; and

an outer pipe externally fitted on the support beam body such that the support beam body is provided within an internal space of the outer pipe,

wherein the fitting portion of a first bracket of the plurality of brackets is disposed so as to be in contact with a first axial end of the outer pipe,

wherein the fitting portion of a second bracket of the plurality of brackets is disposed so as to be in contact with a second axial end of the outer pipe such that the outer pipe is interposed between the fitting portions of the first and second brackets, and

wherein the fitting portion of at least one of the first and second brackets is fixed to the support beam body in an axially positioned state and configured to hold the outer pipe externally fitted on the support beam body.

2. A steering support beam, comprising:

a cylindrical support beam body;

front pillar attaching side brackets externally fitted on and fixed to end portions of the cylindrical support beam body, respectively;

a plurality of parts attaching brackets each having a fitting portion fitted on an axial intermediate portion of the support beam body and fixed thereto; and

an outer pipe externally fitted on the support beam body such that the support beam body is provided within an internal space of the outer pipe,

wherein the fitting portion of at least one of the plurality of parts attaching brackets is disposed so as to be in contact with a first axial end of the outer pipe,

wherein the fitting portion of at least one of the front pillar attaching side brackets is disposed so as to be in contact with a second axial end of the outer pipe such that the outer pipe is interposed between the fitting portions of the at least one parts attaching bracket and the at least one front pillar attaching side bracket, and

wherein the fitting portion of at least one of the at least one parts attaching bracket and the at least one front pillar attaching side bracket is fixed to the support beam body in an axially positioned state and configured to hold the outer pipe externally fitted on the support beam body.

3. A steering support beam, comprising:

a cylindrical support beam body;

front pillar attaching side brackets externally fitted on and fixed to end portions of the cylindrical support beam body, respectively;

an air-bag unit attaching bracket having a fitting portion fitted on an axial intermediate portion of the support beam body and fixed thereto;

a steering attaching bracket having a fitting portion fitted on an axial intermediate portion of the support beam body and fixed thereto; and

outer pipes each externally fitted on the support beam body such that the support beam body is provided within an internal space of each outer pipe,

wherein the fitting portion of the air-bag unit attaching bracket is disposed so as to be in contact with a first axial end of a first outer pipe and the fitting portion of a first one of the front pillar attaching side brackets is disposed so as to be in contact with a second axial end of the first outer pipe such that the first outer pipe is interposed between the fitting portions of the air-bag unit attaching bracket and the first front pillar attaching side bracket,

wherein the fitting portion of at least one of the air-bag unit attaching bracket and the first front pillar attaching side bracket is fixed to the support beam body in an axially positioned state and configured to hold the outer pipe externally fitted on the support beam body,

wherein the fitting portion of the steering attaching bracket is disposed so as to be in contact with a first axial end of a second outer pipe and the fitting portion of a second one of the front pillar attaching side brackets is disposed so as to be in contact with a second axial end of the second outer pipe such that the second outer pipe is interposed between the fitting portions of the steering attaching bracket and the second front pillar attaching side bracket,

wherein the fitting portion of at least one of the steering attaching bracket and the second front pillar attaching side bracket is fixed to the support beam body in an axially positioned state and configured to hold the second outer pipe externally fitted on the support beam body.

4. The steering support beam as recited in any one of claims 1 to 3 , wherein the fixing of the fitting portion of the bracket to the support beam body is performed by welding.

5. The steering support beam as recited in claim 4 , wherein the fitting portion of the bracket is fixed to the support beam body by welding at least one of axial edge portions of the fitting portion of the bracket along the circumferential direction thereof.

6. The steering support beam as recited in claim 4 , wherein the fitting portion of the bracket is provided with an elongate aperture, and wherein the fitting portion of the bracket is welded to the support beam body at the elongate aperture.

7. The steering support beam as recited in claim 6 , wherein the elongate aperture is formed along an axial direction or a circumferential direction of the fitting portion of the bracket.

8. The steering support beam as recited in claim 4 , wherein the fitting portion of the bracket is provided with a cut-out portion at a part of a periphery of the fitting portion, and wherein the fitting portion of the bracket is welded to the support beam body at the cut-out portion.

9. The steering support beam as recited in any one of claims 1 to 3 , wherein the fitting portion of the bracket is fixed to the support beam body by forming a friction stir welding portion at a part of a periphery of the fitting portion of the bracket.

10. The steering support beam as recited in any one of claims 1 to 3 , wherein the support beam body, the outer pipe and the brackets are extruded members.

11. The steering support beam as recited in any one of claims 1 to 3 , wherein the support beam body and the outer pipe are extruded members, and the brackets are cast members.

12. The steering support beam as recited in claim 10 , wherein the extruded member is made of light metal or its alloy.

13. The steering support beam as recited in claim 10 , wherein the extruded member is an aluminum extruded member.

14. The steering support beam as recited in claim 10 , wherein the extruded member is a synthetic resin extruded member.

15. The steering support beam as recited in claim 11 , wherein the extruded member is made of light metal or its alloy.

16. The steering support beam as recited in claim 11 , wherein the extruded member is an aluminum extruded member.

17. The steering support beam as recited in claim 11 , wherein the extruded member is a synthetic resin extruded member.

18. An instrument panel mounting structure using the steering support beam as recited in any one of claims 1 to 3 .

19. A vehicle provided with the steering support beam as recited in any one of claims 1 to 3 .