Front vehicle-body structure of vehicle

Patent metadata

Field	Value
Publication number	US-9254801-B2
Application number	US-201414525825-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Dec 5, 2013
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A protecting member comprises a pair of right-and-left brackets extending obliquely downward and forward from front portions of a pair of right-and-left side frames and a stiffener extending in a vehicle width direction below a bumper beam and attached to front ends of the brackets. The stiffener has a closed cross section extending in the vehicle width direction, and an upper face of its central portion in the vehicle width direction has a concaved portion. A lower face of the stiffener extends horizontally substantially straightly. It is preferable that the closed cross section of the central portion of the stiffener be configured such that its vertical distance is relatively small and its longitudinal width is relatively large, compared with the other part of the stiffener.

First claim

What is claimed is:

1. A front vehicle-body structure of a vehicle, comprising:
a pair of right-and-left side frames extending longitudinally at a front portion of a vehicle body;
a bumper beam extending in a vehicle width direction and attached to front ends of the pair of right-and-left side frames;
a pair of right-and-left brackets attached to the pair of right-and-left side frames or a suspension cross member attached to the pair of right-and-left side frames and extending obliquely downward and forward; and
a stiffener extending in the vehicle width direction, arranged below the bumper beam, and attached to front ends of the pair of right-and-left brackets,
wherein said stiffener has a closed cross section extending in the vehicle width direction substantially over an whole length thereof and is configured in an elevational view such that an upper face of a central portion thereof in the vehicle width direction is concaved and a lower face thereof extends horizontally substantially straightly, and
said central portion, in the vehicle width direction, of the stiffener is configured such that a distance between the upper face and the lower face thereof is smaller than a distance between the upper face and lower face of the other part of the stiffener and a longitudinal width thereof is larger than a longitudinal width of the other part of the stiffener.

2. The front vehicle-body structure of a vehicle of claim 1 , wherein said stiffener comprises an upper-side member and a lower-side member which are joined together to form the closed cross section thereof, respective rear flange portions of said upper-side and lower-side members which are formed at respective rear portions of the upper-side and lower-side members and joined to each other, and a joint portion of said respective rear flange portions of the upper-side and lower-side members is configured in a back view to extend horizontally substantially straightly.

3. The front vehicle-body structure of a vehicle of claim 2 , wherein said closed cross section of the stiffener is configured such that a longitudinal width of the central portion, in the vehicle width direction, of the stiffener is larger than that of the other part of the stiffener.

4. The front vehicle-body structure of a vehicle of claim 1 , wherein said closed cross section of the stiffener is configured such that a longitudinal width of the central portion, in the vehicle width direction, of the stiffener is larger than that of the other part of the stiffener.

5. A front vehicle-body structure of a vehicle, comprising:
a pair of right-and-left side frames extending longitudinally at a front portion of a vehicle body;
a bumper beam extending in a vehicle width direction and attached to front ends of the pair of right-and-left side frames;
a pair of right-and-left brackets attached to the pair of right-and-left side frames or a suspension cross member attached to the pair of right-and-left side frames and extending obliquely downward and forward; and
a stiffener extending in the vehicle width direction, arranged below the bumper beam, and attached to front ends of the pair of right-and-left brackets,
wherein said stiffener has a closed cross section extending in the vehicle width direction substantially over an whole length thereof and is configured in an elevational view such that an upper face of a central portion thereof in the vehicle width direction is concaved and a lower face thereof extends horizontally substantially straightly, and
the stiffener comprises an upper-side member and a lower-side member which are joined together to form the closed cross section thereof, respective rear flange portions of said upper-side and lower-side members which are formed at respective rear portions of the upper-side and lower-side members and joined to each other, and a joint portion of said respective rear flange portions of the upper-side and lower-side members is configured in a back view to extend horizontally substantially straightly.

6. The front vehicle-body structure of a vehicle of claim 5 , wherein said closed cross section of the stiffener is configured such that a longitudinal width of the central portion, in the vehicle width direction, of the stiffener is larger than that of the other part of the stiffener.

Assignees

• Mazda Motor

Inventors

• Sogabe Hiroshi
• Kito Masatoki
• Takada Hirofumi
• Watanabe Tsutomu
• Furumoto Arihiro
• Murakami Ryuma
• Nakamae Takayuki

Classifications

• B62D25/082 Primary

  Engine compartments · CPC title

• B60R21/34

  Protecting non-occupants of a vehicle, e.g. pedestrians {(B60R19/02 takes precedence)} · CPC title

• B60R19/12

  vertically spaced · CPC title

• B60R19/54 Primary

  Obstruction removers or deflectors (B60R19/16, B60R21/34 take precedence) · CPC title