Structure for vehicle high-strength member
A high-strength element structure for a vehicle body has high strength and rigidity effectively maintained while an increase in weight is reduced. The structure includes a vehicle high-strength element body which is provided at a front in a vehicle cabin of a vehicle and extends substantially in a vehicle width direction, in which the vehicle high-strength element body has a circular pipe-like cross section, and comprises partial high rigidity portions only in an inner diameter portion thereof without any change in an outer diameter shape; and the vehicle high-strength element body is functionally divided at least into a driver's seat-side portion and a passenger's seat-side portion, and the high rigidity portion of the driver's seat-side portion and the high rigidity portion of the passenger's seat-side portion are differently configured from each other.
1. An element for a vehicle body comprising:
a body configured to be disposed at a front of a vehicle cabin and extend substantially in a vehicle width direction, wherein
the element body has a cross section of a circular pipe shape with an inner diameter portion and an outer diameter portion and comprises a rigid portion only in the inner diameter portion and a stay in a middle part in the vehicle width direction which is vertically supportable of a lower part of the element body;
the element body is divided at least into a driver's seat-side portion and a passenger's seat-side portion, such that the rigid portion includes a rigid portion on the driver's seat-side portion and a rigid portion on the passenger's seat-side portion, and the rigid portion on the driver's seat-side portion and the rigid portion on the passenger's seat-side portion are configured differently from each other;
the element body is structurally divided into the driver's seat portion and the passenger's seat-side portion from a position of the stay;
the rigid portion of the driver's seat-side portion includes a rigid portion for an upper half driver's seat-side portion, and a rigid portion for a lower half driver's seat-side portion; and
the rigid portion for the upper half driver's seat-side portion is a torsional deformation reducing portion having an inner curved surface, and is disposed in a rear half of the driver's seat-side portion in a vehicle front-back direction so as to be capable of reducing and preventing torsional deformation of the driver's seat-side portion.
2. The element for a vehicle body according to claim 1 , wherein
the rigid portion for the lower half driver's seat-side portion is a vertical flexure reducing portion disposed in a middle of the driver's seat-side portion in the vehicle front-back direction so as to be capable of reducing and preventing vertical flexure of the driver's seat-side portion.
3. The element for a vehicle body according to claim 1 , wherein
the rigid portion on the passenger's seat-side portion includes a rigid portion for a front half passenger's seat-side portion, and a rigid portion for a rear half passenger's seat-side portion.
4. The element for a vehicle body according to claim 3 , wherein
the rigid portions for the front half and rear half passenger's seat-side portions are both disposed in a middle of the passenger's seat-side portion in the vertical direction so as to be capable of reducing and preventing flexure of the passenger's seat-side portion in the vehicle front-back direction.
5. The element for a vehicle body according to claim 1 , wherein
the rigid portion on the driver's seat-side portion and the rigid portion on the passenger's seat-side portion are increased thickness portions or reinforced rib portions disposed partially in the inner diameter portion of the element body.
6. The element for a vehicle body according to claim 1 , wherein
the element body includes, in a lower part of the driver's seat-side portion, a steering column supported by a column bracket,
an upper end of the column bracket extends to a rear half of the upper half driver's seat-side portion in the vehicle front-back direction; and
the torsional deformation reducing portion is configured to prevent the torsional deformation of the driver's seat-side portion due to a load of the steering column.
7. The element for a vehicle body according to claim 1 , wherein
the torsional deformation reducing portion is formed of protrusions on the inner diameter portion; and
surfaces of the protrusions are curved surfaces.
8. The element for a vehicle body according to claim 1 , wherein
the torsional deformation reducing portion is asymmetrically disposed on the inner diameter portion.
9. The element for a vehicle body according to claim 8 , wherein the torsional
deformation reducing portion is only disposed in a range of about 0° to 90° in a cross-sectional view in the vehicle front-back direction on the inner diameter portion.