JP6263223B2 - Body front structure - Google Patents

Description

  The present invention relates to a vehicle body front structure.

  Conventionally, as a vehicle body front structure of a vehicle, a lower end portion of a front pillar is coupled to an upper portion of a front end portion of a side sill (see Patent Document 1). Since the rear end portion of the lower end portion of the front pillar is coupled to the upper portion of the side sill, the rear end portion is bent so as to exhibit an arc shape having a center at the rear upper side. That is, the ridgeline of the front pillar is aligned with the ridgeline of the side sill.

JP 2014-046822 A

  In a vehicle having such a vehicle body front structure, when a front collision occurs, the front wheel of the vehicle moves rearward, so that a front collision load may be input to a joint portion between the front pillar and the side sill. Therefore, it is desired to improve the strength against the front impact load at such a bonding site.

  This invention is made | formed in view of the said point, and makes it a subject to provide the vehicle body front part structure which can improve the intensity | strength with respect to a front collision load.

In order to solve the above-described problems, a vehicle body front structure according to the present invention includes a front pillar outer that forms a front pillar by being coupled to a front pillar inner, and a side sill that is coupled to a lower end portion of the front pillar outer. The front pillar outer includes a plurality of bent portions formed in a line upward from the coupling portion with the side sill, and the lowermost of the plurality of bent portions. The first bent portion has an arc shape having a center in the front lower direction, and the second bent portion on the upper side of the first bent portion has an arc shape having a center in the rear upper direction. To do.

  According to this configuration, the strength against the front impact load can be improved.

  The front pillar outer may include a flange portion disposed on the upper wall portion of the side sill, and the flange portion may include a bead portion extending in the front-rear direction.

  According to this configuration, the strength against the front collision load can be further improved.

  A through hole that communicates the space between the front pillar outer and the front pillar inner and the outside may be formed between the bead portion and the upper wall portion of the side sill.

  According to this configuration, the electrodeposition-coated paint can be suitably guided to the hollow portion of the front pillar through the through hole.

  The side sill is composed of a side sill inner and a side sill outer, and a jackup plate is provided between the side sill inner and the side sill outer, and the jackup plate is more than the front pillar outer. The structure extended to back may be sufficient.

  According to this configuration, the strength of the side sill can be improved, and the strength against the front impact load can be further improved.

  The jack-up plate may include an oblique bead portion extending in an oblique direction and may be formed rearward of the front pillar outer.

According to this configuration, it is possible to improve the strength of the jack-up plate and to efficiently transmit the load from the front pillar outer to the side sill.
The vehicle body front structure according to the present invention includes a front pillar outer that forms a front pillar by being coupled to a front pillar inner, and a side sill that is coupled to a lower end portion of the front pillar outer. In the structure, the front pillar outer includes a plurality of bent portions formed side by side upward from a coupling portion with the side sill, and the front pillar outer is disposed on an upper wall portion of the side sill. A flange portion, and the flange portion includes a bead portion extending in the front-rear direction, and the space between the bead portion and the upper wall portion of the side sill is between the front pillar outer and the front pillar inner. A through hole that communicates the space with the outside is formed.
The vehicle body front structure according to the present invention includes a front pillar outer that forms a front pillar by being coupled to a front pillar inner, and a side sill that is coupled to a lower end portion of the front pillar outer. The front pillar outer includes a plurality of bent portions formed side by side upward from a coupling portion with the side sill, and the side sill is constituted by a side sill inner and a side sill outer, A jack-up plate is provided between the side sill inner and the side sill outer. The jack-up plate extends to the rear of the front pillar outer, and the jack-up plate is inclined. An oblique bead portion extending, and the oblique bead portion is Characterized in that it is formed in the rear than the front pillar outer.

  According to the present invention, the strength against the front impact load can be improved in the vehicle body front portion structure.

It is a side view which shows the vehicle body front part structure which concerns on embodiment of this invention, and is a figure which shows the state which removed the door. It is a side view which shows the vehicle body front part structure which concerns on embodiment of this invention, and is a figure which shows the state which removed the door and the fender panel. FIG. 3 is a partially enlarged view of FIG. 2. It is a schematic cross section which shows the rear wall part of a front pillar outer. It is a schematic cross section in the VV arrow line of FIG. FIG. 3 is a side view showing the vehicle body front structure according to the embodiment of the present invention, and is a partially enlarged view showing a state in which a door, a fender panel, and a side sill outer are removed and a lower end portion of a front pillar outer is broken.

  The embodiment of the present invention will be described in detail with reference to the drawings, taking as an example the case where the vehicle body front structure of the present invention is applied around the left side door opening. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. Note that “front and rear” indicated by arrows in each figure indicates the longitudinal direction of the vehicle body, “up and down” indicates the vertical direction of the vehicle body, and “left and right” indicates the left and right direction (vehicle width direction) viewed from the driver's seat. Show.

<Car body front structure>
As shown in FIGS. 1 and 2, a vehicle body front structure 1 according to an embodiment of the present invention is a structure around a door opening 2 for a front seat (driver seat and front passenger seat) of the vehicle. The vehicle body front structure 1 includes a front pillar 3 and a side sill 4.

<Front pillar>
The front pillar 3 is a metal skeleton member that extends in the vertical direction and forms the front vertical side of the frame of the door opening 2. The front pillar 3 has a rectangular frame shape in plan view, and has a hollow portion with a closed cross section in plan view.

  As shown in FIG. 1, the front portion of the front pillar 3 is covered with a fender panel 5 that is an outer panel of the vehicle in a side view from the outside in the vehicle width direction. Further, the rear part of the front pillar 2 (part exposed from the fender panel 5) is covered with a front seat door (not shown) which is an outer panel of the vehicle in a side view from the outside in the vehicle width direction. . In addition, a rear end portion of an upper member 6 that is a metal skeleton member extending in the front-rear direction is coupled (joined by welding or the like) to the upper portion of the front pillar 3. In addition, a wheel house 7 in which a front wheel (not shown) of the vehicle is accommodated is provided in front of the lower portion of the front pillar 3.

  As shown in FIG. 2, the front pillar 3 includes a front pillar inner 10 and a front pillar outer 20 provided outside the front pillar inner 10 in the vehicle width direction.

≪Front Pillar Inner≫
The front pillar inner 10 is a metal member that constitutes the inner wall portion of the front pillar 3.

≪Front pillar outer≫
The front pillar outer 20 is a metal member that forms the outer wall portion, the front wall portion, and the rear wall portion of the front pillar 3. The front pillar outer 20 is a metal member that integrally includes an outer wall portion 21, a front wall portion 22, a front flange portion 23, a rear wall portion 24, and a rear flange portion 25. The front pillar outer 20 is formed by bending a metal plate-like member.

  The outer wall 21 is a wall facing the front pillar inner 10 and constitutes an outer wall of the front pillar 3. A front seat door (not shown) is attached to the outer wall portion 21 via a hinge. The front wall portion 22 extends inward in the vehicle width direction from the front end portion of the outer wall portion 21 and constitutes the front wall portion of the front pillar 3. The front flange portion 23 extends forward from the inner end portion of the front wall portion 22 in the vehicle width direction, and is coupled to the front pillar inner 10 (in the present embodiment, joined by welding or the like). The rear wall portion 24 extends inward in the vehicle width direction from the rear end portion of the outer wall portion 21 and constitutes the rear wall portion of the front pillar 3. The rear flange portion 25 extends rearward from the vehicle width direction inner end portion of the rear wall portion 24 and is coupled to the front pillar inner 10 (in this embodiment, joined by welding or the like). The front end portion of the outer wall portion 21, the front wall portion 22 and the lower end portion of the front flange portion 23 have a shape along the wheel house 7.

  A concave portion 21 a that is recessed inward in the vehicle width direction is formed at the lower end portion of the outer wall portion 21 of the front pillar outer 20. The concave portion 21a has a substantially trapezoidal shape in which the rear vertical side, that is, the vertical wall portion is inclined in a side view.

≪Bent part≫
As shown in FIG. 3, the front pillar outer 20 includes a plurality of bent portions. The plurality of bent portions are formed at the lower end portion of the front pillar outer 20 so as to be aligned in the vertical direction. In the present embodiment, the plurality of bent portions are configured by an inclined vertical side (vertical wall portion) on the rear side of the concave portion 21a, a rear wall portion 24, and a portion sandwiched between these in the outer wall portion 21. It is a bead part.

In the present embodiment, the front pillar outer 20 includes a first bent portion 20a and a second bent portion 20b as a plurality of bent portions. As shown in FIG. 4, the first bent portion 20a extends upward from the upper wall portion of the side sill 3 (specifically, the upper wall portion 44 of the side sill outer 40). It is bent so as to exhibit an arc shape having a center O _{1 in the} downward direction. The second bent portion 20b is extended upward from the upper end of the first bent portion 20a, in side view, it is bent to exhibit arcuate shape having a center O ₂ on the direction obliquely rearward . In other words, in a side view from the outside in the vehicle width direction, when the longitudinal axis is the x axis (front is negative, the rear is positive) and the vertical axis is the y axis (lower is negative, upper is positive), the second The bent portion 20b is a downwardly convex decreasing section, and the first bent portion 20a is an upwardly convex decreasing section. That is, the first bent portion 20a and the second bent portion 20b are bent in different directions as viewed from the side, and have a substantially S-shape. Moreover, the 1st bending part 20a exhibits the shape of the upper half which cut later the convex shape by the side view, and more specifically cut | disconnected the convex curve later by the vertex. The second bent portion 20b has a front convex shape in a side view, and more specifically, a lower half shape obtained by cutting a front convex curve at the apex.

<Side sill>
As shown in FIGS. 1 and 2, the side sill 4 is a metal skeleton member that extends in the front-rear direction and forms the lower lateral side of the frame of the door opening 2. The side sill 4 has a substantially rectangular frame shape (in this embodiment, a hexagonal shape) when viewed from the front, and has a hollow portion having a closed cross section when viewed from the front. The side sill 4 is covered with a closed door (not shown) for the front seat, which is an outer panel of the vehicle, in a side view from the outside in the vehicle width direction.

  As shown in FIG. 5, the side sill 4 includes a side sill inner 30 and a side sill outer 40.

≪Side sill inner≫
The side sill inner 30 is a metal member that constitutes an inner wall part, a part of the lower wall part, and a part of the upper wall part of the side sill 4. The side sill inner 30 integrally includes an inner wall portion 31, a lower wall portion 32, a lower flange portion 33, an upper wall portion 34, and an upper flange portion 35. The side sill inner 30 is formed by bending a metal plate-like member.

  The inner wall portion 31 constitutes an inner wall portion of the side sill 4. The lower wall portion 32 extends outward from the lower end portion of the inner wall portion 31 in the vehicle width direction, and constitutes the inner half of the lower wall portion of the side sill 4. The lower flange portion 33 extends downward from the outer end portion of the lower wall portion 32 in the vehicle width direction. The upper wall portion 34 extends outward from the upper end portion of the inner wall portion 31 in the vehicle width direction, and constitutes the inner half of the upper wall portion of the side sill 4. The upper flange portion 35 extends upward from the outer end portion of the upper wall portion 34 in the vehicle width direction.

≪Side sill outer≫
The side sill outer 40 is a metal member that constitutes an outer wall part, a part of the lower wall part, and a part of the upper wall part of the side sill 4. The side sill outer 40 integrally includes an outer wall portion 41, a lower wall portion 42, a lower flange portion 43, an upper wall portion 44, and an upper flange portion 45. The side sill outer 40 is formed by bending a metal plate-like member.

  The outer wall portion 41 constitutes an outer wall portion of the side sill 4. The lower wall portion 42 extends inward in the vehicle width direction from the lower end portion of the outer wall portion 41 and constitutes the outer half of the lower wall portion of the side sill 4. The lower flange portion 43 extends downward from the inner end in the vehicle width direction of the lower wall portion 42, and is coupled to the lower flange portion 33 of the side sill inner 30 (in this embodiment, joined by welding or the like). . The upper wall portion 44 extends inward in the vehicle width direction from the upper end portion of the outer wall portion 41 and constitutes the outer half of the upper wall portion of the side sill 4. The upper flange portion 45 extends upward from the inner end in the vehicle width direction of the upper wall portion 44 and is coupled to the upper flange portion 35 of the side sill inner 30 (in this embodiment, joined by welding or the like). .

≪Jack-up plate≫
The jack-up plate 50 is a metal member that reinforces a portion to which the jack is attached when jacking up the vehicle. In the present embodiment, the jack-up plate 50 is interposed between the side sill inner 30 and the side sill outer 40. The lower end portion of the jack-up plate 50 is sandwiched between the lower flange portions 33 and 43, and is joined to the lower flange portions 33 and 43 (in this embodiment, joined by welding or the like). The upper end portion of the jack-up plate 50 is sandwiched between the upper flange portions 35 and 45, and is joined to the upper flange portions 35 and 45 (joined by welding or the like in the present embodiment).

  The jack-up plate 50 extends to the rear of the front pillar outer 20. In other words, the front end portion of the jackup plate 50 is disposed at the front end portion of the side sill 4, and the rear end portion of the jackup plate 50 is disposed rearward of the rear end portion of the lower end portion of the front pillar outer 20. ing.

  As shown in FIG. 6, the jack-up plate 50 includes one or more vertical bead portions 51 and one or more oblique bead portions 52 provided behind the one or more vertical bead portions 51.

One or more (four in this embodiment) vertical bead portions 51 are vertically long concave portions extending in the vertical direction. The vertical bead portion 51 is a concave portion recessed inward in the vehicle width direction. The front two vertical bead portions 51 are formed between the lower flange portions 33 and 43 and the upper flange portions 35 and 45. The rear two vertical bead portions 51 are formed longer than the front two vertical bead portions 51 downward.
The plurality of vertical bead portions 51 are for improving the rigidity in the vertical direction of the jack-up plate 50 and ensuring the ease of crushing in the front-rear direction (impact absorbing performance against a front collision load).

  The lower end portion of the jack up plate 50 where the two rear vertical bead portions 51 are formed is exposed to extend downward from the lower flange portions 33 and 43, and the vehicle width. It is bent inward. Such a bent portion constitutes a jack attachment portion 53 to which a jackup load is applied by attaching a jackup device (not shown).

  One or more (two in the present embodiment) oblique bead portions 52 are vertically long concave portions that extend in the vertical direction and incline backward as they go upward. The oblique bead portion 52 is a recess that is recessed inward in the vehicle width direction. The one or more oblique bead portions 52 are formed between the lower flange portions 33 and 43 and the upper flange portions 35 and 45. Further, the one or more oblique bead portions 52 are disposed behind the rear end portions of the lower end portions of the front pillar inner 10 and the front pillar outer 20. The one or more oblique bead portions 52 are arranged such that a part of the foremost oblique bead portion 52 is directly above the jack mounting portion 53. Other portions of the one or more oblique bead portions 52 are disposed above and behind the jack mounting portion 53.

<Assembly part of front pillar outer and side sill outer>
As shown in FIG. 3, the front pillar outer 20 includes a flange portion 26 that extends rearward from the lower end portion of the rear wall portion 24. The flange portion 26 is coupled to the upper wall portion 44 of the side sill outer 40 (in this embodiment, joined by welding or the like). Further, a portion of the front pillar outer 20 that is lower than the concave portion 21a of the outer wall portion 21 is joined to the outer wall portion 41 of the side sill outer 40 (in this embodiment, joined by welding or the like). Further, at the upper end portion of the side sill 4, the upper flange portion 34, the jackup plate 50, the upper flange portion 44, the front pillar inner 10, and the flange portions 23 and 25 are stacked in order from the inner side in the vehicle width direction. A rear end portion of the outer wall portion 21 extends on the outer side in the vehicle width direction of the flange portion 26, and a rear end portion of the rear flange portion 25 extends on the inner side in the vehicle width direction of the flange portion 26. . That is, the outer wall portion 21, the rear flange portion 25, and the rear end portion of the outer wall portion 21 are at the same position in the front-rear direction.

  The flange portion 26 includes a bead portion 26a extending over the entire front-rear direction. The bead part 26a is a concave part protruding upward. A through hole A is formed between the bead portion 26 a and the upper wall portion 44 of the side sill outer 40. The through hole A communicates the hollow portion of the front pillar 3 (the space between the front pillar inner 10 and the front pillar outer 20) and the outside.

<Load transmission at front impact>
At the time of a frontal collision of the vehicle, a front collision load is input to the front pillar 3 by moving a front wheel (not shown) rearward. The front impact load is transmitted to the side sill 4 from the coupling portion between the front pillar outer 20 and the side sill 4 through the second bent portion 20b and the first bent portion 20a of the front pillar outer 20 in order.

  In the vehicle body front structure 1 according to the embodiment of the present invention, since the front pillar outer 20 includes a plurality of bent portions 20a and 20b, stress concentration at the time of a front collision can be suppressed and the strength against a front collision load can be improved. it can.

  In addition, the vehicle body front structure 1 has an arc shape in which the first bent portion 20a and the second bent portion have centers in the front lower direction and the rear upper direction, respectively, so that the strength against the front impact load is further improved. Can do.

  Moreover, since the flange part 26 is equipped with the bead part 26a, the vehicle body front part structure 1 can further improve the strength against the front collision load.

  Further, in the vehicle body front structure 1, the through hole A is formed between the bead portion 26 a and the upper wall portion 44 of the side sill outer 40, so that the coating of the electrodeposition coating is made hollow through the through hole A in the front pillar 3. (Refer to the arrow in FIG. 3).

  Moreover, since the jackup plate 50 is extended to the back rather than the front pillar outer 20, the vehicle body front part structure 1 can improve the strength of the side sill 4 and can further improve the strength against the front collision load.

In the vehicle body front structure 1, since the jackup plate 50 includes the oblique bead portion 52, the strength of the jackup plate 50 can be improved.
In the vehicle body front structure 1, since the jack-up plate 50 includes the oblique bead portion 52, the load from the front pillar outer 20 can be efficiently transmitted to the side sill 4.
Moreover, since the jackup plate 50 includes the oblique bead portion 52, the vehicle body front structure 1 can reinforce the side sill 4 against the front collision load.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably. For example, the plurality of bent portions 20 a and 20 b may be configured only by the rear wall portion 24 of the front pillar outer 20, or may be configured only by the vertical wall portion on the rear side of the recess 21 a of the front pillar outer 20. Good. Further, the front pillar outer 20 may be configured to include a third or more bent portion on the upper side of the second bent portion 20b. Further, the front pillar outer 20 may have a configuration in which the first bent portion has a forward convex shape, and the second or more bent portions alternately have a convex shape in the front-rear direction. The oblique bead portion 52 may be a vertically long convex portion that protrudes outward in the vehicle width direction, or may be a vertically long concave portion or convex portion that extends in the vertical direction and inclines forward as it goes upward. Good.

DESCRIPTION OF SYMBOLS 1 Car body front part structure 3 Front pillar 4 Side sill 10 Front pillar inner 20 Front pillar outer 20a 1st bending part 20b 2nd bending part 26 Flange part 26a Bead part 30 Side sill inner 40 Side sill outer 50 Jack up plate 52 Diagonal bead part A Through hole

Claims (7)

A front pillar outer that forms a front pillar by being combined with a front pillar inner;
A side sill coupled to the lower end of the front pillar outer;
A vehicle body front structure comprising:
The front pillar outer includes a plurality of bent portions formed side by side upward from a coupling site with the side sill ,
The lowermost first bent portion of the plurality of bent portions has an arc shape having a center in the front lower direction,
The vehicle body front part structure characterized in that the second bent part on the upper side of the first bent part has an arc shape having a center in the rear upper direction . The front pillar outer includes a flange portion disposed on an upper wall portion of the side sill,
The vehicle body front part structure according to claim 1 , wherein the flange portion includes a bead portion extending in the front-rear direction. Between the upper wall portion of the side sill and the bead portion, according to claim 2, characterized in that it constitutes a through hole for communicating the space and the outside between the front pillar outer and the front pillar inner Body front structure. The side sill is composed of a side sill inner and a side sill outer,
A jack-up plate is provided between the side sill inner and the side sill outer,
The vehicle body front part structure according to any one of claims 1 to 3, wherein the jack-up plate extends rearward from the front pillar outer. The jack-up plate includes an oblique bead portion extending in an oblique direction,
The vehicle body front part structure according to claim 4 , wherein the oblique bead portion is formed rearward of the front pillar outer. A front pillar outer that forms a front pillar by being combined with a front pillar inner;
A side sill coupled to the lower end of the front pillar outer;
A vehicle body front structure comprising:
The front pillar outer includes a plurality of bent portions formed side by side upward from a coupling site with the side sill,
The front pillar outer includes a flange portion disposed on an upper wall portion of the side sill,
The flange portion includes a bead portion extending in the front-rear direction,
Between the bead part and the upper wall part of the side sill, a through hole is formed to communicate the space between the front pillar outer and the front pillar inner and the outside.
A vehicle body front structure characterized by that. A front pillar outer that forms a front pillar by being combined with a front pillar inner;
A side sill coupled to the lower end of the front pillar outer;
A vehicle body front structure comprising:
The front pillar outer includes a plurality of bent portions formed side by side upward from a coupling site with the side sill,
The side sill is composed of a side sill inner and a side sill outer,
A jack-up plate is provided between the side sill inner and the side sill outer,
The jack-up plate extends rearward from the front pillar outer,
The jack-up plate includes an oblique bead portion extending in an oblique direction,
The oblique bead portion is formed behind the front pillar outer.
A vehicle body front structure characterized by that.

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