Steering apparatus

A steering apparatus comprising:

• an inner column;
• a left-right pair of outer column half bodies respectively having holding surface portions for holding an outer peripheral surface of the inner column;
• a fixing bracket having fixing side portions that sandwich the outer column half bodies;
• and
• a clamping tool that clamps the fixing bracket and the two outer column half bodies,
• wherein, in a condition where the inner column is clamped fixedly via the clamping tool, the inner column is held by the holding surface portions of the two outer column half bodies,
• an upper recessed indentation portion and a lower recessed indentation portion that do not contact the inner column are formed on the respective holding surface portions of the two outer column half bodies,
• strip-form contact portions that contact the inner column are formed in locations on either circumferential direction side of the upper recessed indentation portion and the lower recessed indentation portion,
• the strip-form contact portions are formed in at least four locations on the two outer column half bodies,
• wherein the strip-form contact portions of the outer column half bodies exhibit left-right symmetry about a diametrical center of the inner column, and
• wherein the upper recessed indentation portion and the lower recessed indentation portion are constituted by recessed arc-shaped surfaces having a smaller radius of curvature than an outer diameter of the inner column.

A steering apparatus comprising:

• an inner column;
• a left-right pair of outer column half bodies respectively having holding surface portions for holding an outer peripheral surface of the inner column;
• a fixing bracket having fixing side portions that sandwich the outer column half bodies;
• and
• a clamping tool that clamps the fixing bracket and the two outer column half bodies,
• wherein, in a condition where the inner column is clamped fixedly via the clamping tool, the inner column is held by the holding surface portions of the two outer column half bodies,
• an upper recessed indentation portion and a lower recessed indentation portion that do not contact the inner column are formed on the respective holding surface portions of the two outer column half bodies,
• strip-form contact portions that contact the inner column are formed in locations on either circumferential direction side of the upper recessed indentation portion and the lower recessed indentation portion,
• the strip-form contact portions are formed in at least four locations on the two outer column half bodies,
• wherein the strip-form contact portions exhibit vertical symmetry about a diametrical center of the inner column, and
• wherein the upper recessed indentation portion and the lower recessed indentation portion are constituted by recessed arc-shaped surfaces having a smaller radius of curvature than an outer diameter of the inner column.

A steering apparatus comprising:

• an inner column;
• a left-right pair of outer column half bodies respectively having holding surface portions for holding an outer peripheral surface of the inner column;
• a fixing bracket having fixing side portions that sandwich the outer column half bodies;
• and
• a clamping tool that clamps the fixing bracket and the two outer column half bodies,
• wherein in a condition where the inner column is clamped fixedly via the clamping tool, the inner column is held by the holding surface portions of the two outer column half bodies,
• an upper recessed indentation portion and a lower recessed indentation portion that do not contact the inner column are formed on the respective holding surface portions of the two outer column half bodies,
• strip-form contact portions that contact the inner column are formed in locations on either circumferential direction side of the upper recessed indentation portion and the lower recessed indentation portion,
• the strip-form contact portions are formed in at least four locations on the two outer column half bodies, and
• wherein the upper recessed indentation portion and the lower recessed indentation portion are constituted by recessed arc-shaped surfaces having a smaller radius of curvature than an outer diameter of the inner column.