Mazda Motor Corporation

Fumihiro Kurohara

Hiroyuki Okamoto

Ippei Kuroda

Yasunori Takahara

Hiroto Kido

Masaaki Tanaka

Satoshi Nakamura

Hiromasa Honji

Norio Asano

Yosuke Sawada

Kosuke Mukaigawa

Satoshi Okano

Provided is a suspension subframe structure that can activate a load path using an extension frame in an impact while avoiding increase in vehicle weight and also enables a suspension subframe to disengage from a vehicle body when an impact load is too large to be absorbed by the extension frame alone. The suspension subframe structure of the present invention includes a suspension subframethat supports a suspension memberfor a front wheel. The suspension subframeincludes: a bodythat transmits an impact load input from a vehicle front side toward a vehicle rear side; a fixed portiondisposed near the bodyand fixed to a vehicle body; and a connection portionconnecting the fixed portionto the body. The connection portionis provided with fragile portionshaving a lower strength against a load in a vehicle front-rear direction than the bodyand the fixed portion

Suspension subframe structure

A front vehicle-body structure of a vehicle includes: side frames of a suspension subframe; a cross member connecting front-end portions of the side frames in the vehicle width direction; a front beam member; and a connecting member connecting a front-end portion of each side frame to the front beam member. A high-rigidity portion having a higher rigidity than other portions of the side frame is at a connecting portion between the front-end portion of the side frame and the cross member. The front beam member has a side end portion extending on a vehicle-width-direction outer side relative to a connecting position with the connecting member. A protrusion portion protruding from the side end portion toward a vehicle rear side is to come into contact with the high-rigidity portion from the vehicle-width-direction outer side when a collision load from a vehicle front side is input to the side end portion.

Front vehicle-body structure of vehicle

To restrain a retracting stabilizer from interfering with an assist motor located rearward thereof and ensure energy absorption by a subframe, a vehicle front structure includes an engine; a steering rack disposed frontward of the engine; an assist motor for power steering disposed frontward of the steering rack; a suspension stabilizer disposed frontward of the assist motor; and a subframe mounted with the stabilizer. The stabilizer frontward of the assist motor is disposed offset from the assist motor in an up-down direction so as not to overlap the assist motor in vehicle front view.

Vehicle front structure

A subframe structure includes a pair of left and right front-rear frames each mounted with a lower arm; and a transverse member connecting front portions of the front-rear frames. The front-rear frames each includes a rear horizontal portion formed substantially horizontally, an inclined portion extending frontward and upward from a front end of the rear horizontal portion, and a front horizontal portion extending horizontally frontward from a front end of the inclined portion. The transverse member is jointed at left and right ends thereof to the front horizontal portions respectively corresponding to the left and right ends, a rear end of the front horizontal portion is disposed to be positioned frontward of a front end of an engine, and the front-rear frames are deformed into a Z shape in vehicle side view in an event of a front-end collision and thereby energy of the front-end collision is absorbed.

Subframe structure

A front suspension apparatus in which a front side of a suspension arm can be cut off from a subframe at the time of a small overlap collision without a complication of structure and formability. A front suspension apparatus in which a lower arm from which a front wheel is suspended is provided, and a front arm portion and a rear arm portion of the lower arm are axially supported by axially supporting portions of a subframe is characterized in that an axially supporting portion of the front arm portion is joined to the subframe at a joined portion extending in a vehicle width direction, a joined portion extending in an up-down direction, and a joined portion extending in a front-rear direction, and a joining strength of a joined portion in the front-rear direction is lower than a joining strength of the joined portion in the up-down direction.

Front suspension apparatus

A subframe structure of a front suspension that leads a subframe and a vehicle driving apparatus to the lower side after separation of a rear portion of the subframe due to a frontal collision without increasing weight and parts. A subframe structure of the front suspension provides a subframe that supports a vehicle driving apparatus in a mounting manner, and a rear portion of the subframe is mounted on a lower portion of a vehicle body via a fastening member. Fastening between the subframe and the fastening member is configured such that the rear portion of the subframe is separated when a collision load to a vehicle rear side is applied to the subframe. A leading guide portion that abuts against the fastening member and leads the subframe to a lower side after separation from the fastening member is integrally formed on the rear portion of the subframe.

Growing community of inventors

Aki-gun, Japan

Fumihiro Kurohara