JP5546898B2 - Front body structure of automobile - Google Patents

Description

  The present invention relates to a front body structure of an automobile in which an input at the time of a vehicle collision is transmitted from an upper member to a door belt line rein hose via a front pillar.

  In an automobile, the rear end portion of the upper member extending forward is coupled to the front pillar, and the door belt line rein hose is disposed behind the front pillar so as to be substantially the same height as the upper member, thereby inputting the vehicle collision. A structure is employed in which the upper member transmits the door belt line rein hose through the front pillar (see, for example, Patent Document 1).

  By the way, in the case of the above structure, most of the input load is concentrated and transmitted to the door belt line rein hose, so that the strength of the door belt line rein hose is increased, for example, by increasing the thickness. . However, this causes a problem that the door weight becomes unnecessarily heavy.

  In order to reduce the concentration of input load on the door belt line rein hose, the upper part of the upper member is raised so as to be located above the door belt line rein hose. It is possible to disperse in In this case, since the number of parts increases when another part raising member is added to the upper member, it is preferable to form the raising part integrally by expanding the upper member upward.

JP 2002-347654 A

  By the way, when the upper member is simply expanded upward and raised, the upper member is liable to collapse in the cross section due to the input load, and there is a concern that the input load cannot be efficiently transmitted to the rear part of the vehicle body. For this reason, it is necessary to increase the strength such as further increasing the thickness of the upper member, which increases the weight and cost.

  The present invention has been made in view of the above-described conventional situation, and an automobile front portion that can disperse an input load on an upper portion of a front pillar by raising an upper member upward while suppressing an increase in weight and cost. An object is to provide a vehicle body structure.

According to the present invention, a rear end portion of an upper member having a substantially rectangular tube-like closed cross section extending in the vehicle front-rear direction is coupled to a front pillar extending in the vehicle vertical direction, and a door belt line rein hose is disposed at the rear of the front pillar. The vehicle body front body structure is arranged so as to be opposed to the vehicle and transmits an input at the time of a vehicle collision from the upper member to the door belt line rein hose via the front pillar, and the upper member includes the door belt A raised portion formed so as to be positioned above the upper surface of the line rein hose, and an independent second extending in the vehicle front-rear direction in at least the upper wall portion and the vehicle interior side wall portion of the raised portion in the upper member. reinforce member forming a closed cross section is disposed, said reinforce member, when viewed from the side of the vehicle, after which There proximate the front pillar, the front end is formed so as to be positioned in the front-rear direction central portion of the upper members, when further viewed in the longitudinal direction of the vehicle, said second closed section the front pillar and the beltline Riin It has a retainer portion that is disposed so as to face the hose and abuts against a hood hinge mounting seat formed on the upper wall portion.

  According to the front vehicle body structure of the present invention, the upper member is formed with a raised portion positioned above the upper surface of the door belt line rein hose, and at least the upper wall portion of the raised portion and the inner side wall portion of the raised portion in the upper member A rein hose forming an independent second closed cross section extending in the direction was disposed, and the rein hose was disposed so that the second closed cross section was opposed to the front pillar. Therefore, the strength of the raised portion can be increased by partial reinforcement only by disposing a rein hose for forming the second closed section in the upper member. As a result, it is possible to disperse a part of the input load on the upper portion of the front pillar while suppressing an increase in weight and cost, thereby reducing the concentration of the input load on the door belt line rein hose.

  In addition, since the retainer portion that contacts the hood hinge mounting seat formed on the upper member is formed on the rein hose, the rigidity and strength of the hood hinge mounting seat of the upper member can be further increased.

1 is a side view of a front body of an automobile according to Embodiment 1 of the present invention. It is a top view of the said front part vehicle body. FIG. 3 is a cross-sectional view of the front vehicle body (a cross-sectional view taken along line III-III in FIG. 2).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are views for explaining a front body structure of an automobile according to a first embodiment of the present invention. In the description of the present embodiment, front and rear and left and right mean front and rear and left and right when viewed in a seated state on a seat mounted on a vehicle body.

  In the figure, reference numeral 1 denotes a front body of an automobile. The front vehicle body 1 includes left and right front pillars 2 and 2 extending in the vehicle vertical direction, upper members 3 and 3 extending forward from the left and right front pillars 2, and the left and right front pillars 2. The door belt line rein hoses 4 and 4 are provided on the rear side so as to face the upper member 3 when viewed in the vehicle front-rear direction.

  A roof member 5 is coupled to the upper portion of the front pillar 2, and a floor member 6 is coupled to the lower portion. A front door opening 1 a is formed by the front pillar 2, the roof member 5, the floor member 6 and the center pillar 7.

  A front door 10 is disposed in the front door opening 1a, and the front door 10 is supported by the front pillar 2 via a door hinge (not shown) so as to be opened and closed.

  The front door 10 has a structure in which the door belt line rein hose 4 is disposed along a belt line in a door main body 10c formed by coupling a door outer 10a and a door inner 10b as exterior parts.

  The door belt line rein hose 4 has a cross-sectional hat shape that opens to the inside of the vehicle, and is coupled to the door inner 10b to form a closed cross section that extends in the vehicle front-rear direction with the door inner 10b.

  In the front pillar 2, a pillar rein hose 2c formed along the pillar outer 2a is disposed between a pillar outer 2a having a hat-shaped cross section and a pillar inner 2b, and these are coupled so as to form a square cylindrical closed cross section. Has the structure.

  A bulkhead 12 is disposed in the front pillar 2 so as to be positioned between the upper member 3 and the door belt line reinhose 4.

  Thereby, the input F at the time of the vehicle collision is transmitted from the upper member 3 to the door belt line rein hose 4 via the front pillar 2 and the bulkhead 12, and from the door belt line rein hose 4 to the rear part of the vehicle body via the center pillar 7. Is transmitted to.

  A hood 14 is disposed above the left and right upper members 3. The hood 14 is supported by hood hinges 15, 15 disposed at the rear ends of the left and right upper members 3 so as to be opened and closed. The left and right hood hinges 15 include a hinge bracket 15a fixed to the upper member 3 by a pair of bolts 18 and 18 and a hinge arm 15b fixed to the rear end of the hood 14 by a bolt 19 as a hinge pin 15c. It has the structure connected so that rotation was possible. FIG. 3 shows the fully opened state of the hood 14.

  The left and right upper members 3 have a structure in which a first closed section A having a rectangular tube shape extending in the front-rear direction is formed by joining the side outer panel 16 and the side inner panel 17.

  The side outer panel 16 includes a vehicle outer wall portion 16a extending in the vertical direction and a bottom wall portion 16b extending bent from the lower edge of the outer wall portion 16a toward the vehicle inner side.

  The side inner panel 17 is connected to the outer end of the vehicle outer wall 16a by welding, and extends to the vehicle inner side, and the vehicle inner wall extends downwardly from the inner edge of the vehicle upper wall 17a. It has a portion 17b, and the lower end portion of the inner wall portion 17b is joined to the inner end portion of the bottom wall portion 16b by welding.

  A hood hinge mounting seat 17c is formed on the upper wall portion 17a of the side inner panel 17, and the hood hinge 15 is mounted on the hood hinge mounting seat 17c.

  The left and right upper members 3 each have a raised portion 3 a formed so as to be positioned H above the upper surface 4 a of the door belt line rein hose 4.

  The raised portion 3a is integrally formed by extending the vehicle outer side wall portion 16a of the side outer panel 16 and the vehicle inner side wall portion 17b of the side inner panel 17 upward. Further, the raised portion 3a is inclined rearward and upward so as to increase from the front end of the upper member 3 to the rear.

  As a result, a part F1 of the input F is transmitted to the door belt line reinhose 4 as described above, and the remaining F2 is dispersed from the raised portion 3a to the roof member 5 through the upper part 2 'of the front pillar 2. Communicated.

  In the left and right upper members 3, a rein hose 20 that forms an independent second closed cross section B extending in the vehicle front-rear direction is disposed. The rein hose 20 is disposed such that the second closed cross-section B faces the inner portion of the front pillar 2 in the vehicle width direction when viewed in the vehicle front-rear direction.

  The rein hose 20 is disposed between the upper wall portion 17a and the vehicle interior side wall portion 17b constituting the raised portion 3a, and the upper wall portion 17a and the vehicle interior side wall portion 17b are within the first closed cross section A. An independent second closed section B is formed.

  When viewed from the side of the vehicle, the rein hose 20 is formed so that the rear end thereof is close to the front pillar 2, the front end is located at the center in the front-rear direction of the upper member 3, and the upper end contacts the upper wall portion 17 a. It is formed so that the lower end is located at the center of the upper member 3 in the vertical direction.

  The rein hose 20 includes a retainer portion 20a that contacts the hood hinge mounting seat 17c of the side inner panel 17, a vertical side portion 20b that is bent downward from an inner edge of the retainer portion 20a, and a lower side of the vertical side portion 20b. It has a horizontal side portion 20c that bends and extends from the edge to the vehicle inner side, and a flange portion 20d that is bent downward from the inner edge of the horizontal side portion 20c.

  The above-mentioned hinge bracket 15a is fixed to the retainer portion 20a together with the upper wall portion 17a by bolts 18 together. The flange portion 20d is coupled to the vehicle interior side wall portion 17b by welding. Here, the rein hose 20 of the present embodiment is formed by integrally forming a vertical side portion 20b, a horizontal side portion 20c, and a flange portion 20d on an existing hood hinge retainer.

  According to the present embodiment, the upper member 3 is integrally formed with the raised portion 3a extending so as to be positioned above the upper surface 4a of the door belt line rein hose 4, and the upper member 17 includes the upper wall portion 17a and the vehicle interior side wall portion 17b. Since the rein hose 20 that forms the independent second closed cross section B is disposed, and the rein hose 20 is disposed so that the second closed cross section B faces the front pillar 2, the second closed cross section is provided in the upper member 3. The strength of the raised portion 3a can be increased by partial reinforcement only by disposing the rein hose 20 for forming B. Thereby, a part F2 of the input load F can be distributed and transmitted from the upper part 2 'of the front pillar 2 to the roof member 5 while suppressing an increase in weight and cost. As a result, the concentration of the input load on the door belt line rein hose 4 can be reduced, and the strength and rigidity of the door belt line rein hose 4 can be reduced accordingly.

  In this embodiment, since the retainer portion 20a that contacts the hood hinge mounting seat 17c formed on the upper wall portion 17a of the upper member 3 is formed on the rein hose 20, the rigidity and strength of the hood hinge mounting seat 17c of the upper member 3 are formed. Can be further increased, and as a result, the mounting strength of the hood hinge 15 can be increased.

  Further, since the rein hose 20 is formed by integrally forming the vertical side portion 20b, the horizontal side portion 20c and the flange portion 20d on the existing hood hinge retainer, an increase in cost can be suppressed.

DESCRIPTION OF SYMBOLS 1 Front vehicle body 2 Front pillar 3 Upper member 3a Raised part 4 Door belt line rein hose 4a Upper surface 17a Upper wall part 17b Car interior side wall part 17c Hood hinge attachment seat 20 Rein hose 20a Retainer part A Closed section B Second closed section

Claims (1)

A rear end portion of an upper member having a substantially square cylindrical closed cross section extending in the vehicle longitudinal direction is coupled to a front pillar extending in the vehicle vertical direction, and a door belt line rein hose is opposed to the upper member behind the front pillar. A vehicle front body structure in which an input at the time of a vehicle collision is transmitted from the upper member to a door belt line rein hose via a front pillar,
The upper member has a raised portion formed so as to be positioned above the upper surface of the door belt line rein hose,
In the upper member, a rein hose forming an independent second closed cross section extending in the vehicle front-rear direction at least with the upper wall portion and the vehicle inner wall portion of the raised portion is disposed,
The rein hose is formed such that when viewed from the side of the vehicle, the rear end thereof is close to the front pillar, and the front end is located at the center in the front-rear direction of the upper member.
Further, when viewed in the vehicle front-rear direction, the retainer portion that is disposed so that the second closed section faces the front pillar and the beltline reinhose and abuts against a hood hinge mounting seat formed on the upper wall portion. A front body structure of an automobile characterized by comprising:

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