JP2012030640A - Front structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front structure of a vehicle that secures an installation space of a reinforcing member and improves the rigidity.SOLUTION: A plate brace 26 which links a front end 18A of an upper member 18 to a front side member 12 is located in a lower part of an apron front panel 20. The brace 26 includes a vertical wall 26A and a flange 26B, and is joined to the apron front panel 20, the upper member 18, and the front side member 12 so that a vehicle rear side of the vertical wall 26A is an open section in a vehicle side view. The intermediate part in a vehicle width direction of the vertical wall 26A of the brace 26 and the front side member 12 are connected by two parts of a bracket 30 and a mounting bracket 32. Furthermore, a vehicle-mounted part 40 is combined with the mounting bracket 32 via a rubber mount 42.

Description

  The present invention relates to a vehicle front structure.

  In Patent Document 1 below, a fender apron upper panel disposed in the vehicle front-rear direction, a fender apron inner panel disposed in the vehicle width direction and the vehicle front-rear direction, and the vehicle front-rear direction as viewed from the side of the vehicle. A front side portion structure of a vehicle including a cross-section hat-shaped reinforcing member that forms a closed cross section by being coupled to a front side member is disclosed.

JP 2004-314932 A

  However, according to Patent Document 1, a space for forming a closed cross section of the reinforcing member in the vehicle front-rear direction is required at the front of the vehicle, which is restricted in terms of headlamp design and installation space, and increases in mass. And lead to an increase in welding points.

  Further, if the reinforcing member is opened and sectioned in a side view of the vehicle in order to secure the installation space for the headlamp, the rigidity may be insufficient.

  An object of the present invention is to obtain a vehicle front structure that can secure an installation space for a headlamp or the like and can improve rigidity in consideration of the above facts.

  The vehicle front structure according to the invention of claim 1 is provided along the vehicle front-rear direction, the vehicle body skeleton member disposed along the vehicle front-rear direction, the vehicle body skeleton member provided on the outer side in the vehicle width direction. An upper member, a plate-shaped reinforcing member having a front surface of the vehicle that joins the vehicle front end portion of the upper member and the vehicle body skeleton member on the front side of the vehicle in an open cross section when viewed from the side of the vehicle; And a connecting member that connects the intermediate portion in the vehicle width direction and the vehicle body skeleton member in a direction intersecting the reinforcing member.

  According to a second aspect of the present invention, in the vehicle front structure according to the first aspect, the connecting member is one or more parts configured to include a mounting bracket for mounting a vehicle-mounted part. .

  According to a third aspect of the present invention, in the vehicle front structure according to the second aspect, the vehicle-mounted component is coupled to the mounting bracket via an elastic body.

  According to the first aspect of the present invention, the vehicle body skeleton member disposed along the vehicle longitudinal direction and the vehicle front end portion of the upper member disposed on the vehicle width direction outside upper side of the vehicle body skeleton member are plate-shaped reinforcing members. The reinforcing member includes a front surface of the vehicle that joins the front member of the upper member and the vehicle body skeleton member in an open cross section when viewed from the side of the vehicle. Further, the intermediate portion of the reinforcing member in the vehicle width direction and the vehicle body skeleton member are connected by a connecting member in a direction crossing the reinforcing member. That is, the reinforcing member is formed in a plate shape having a surface on the front side of the vehicle, and the vehicle front end portion of the upper member and the vehicle body skeleton member are joined in an open cross-section when viewed from the side of the vehicle. It becomes small, and installation space, such as a headlamp, can be ensured in the vehicle front part. Further, by connecting the intermediate portion of the reinforcing member in the vehicle width direction and the vehicle body skeleton member with the connecting member, the deformation of the reinforcing member with respect to the vertical input or the like of the vehicle can be suppressed, and the rigidity of the front portion of the vehicle can be improved. .

  According to the second aspect of the present invention, the connecting member is one or two or more parts including a mounting bracket for a vehicle-mounted part that is originally installed in the front portion of the vehicle, and the reinforcing member is located in the middle in the vehicle width direction. By connecting the part and the vehicle body skeleton member, it is possible to efficiently increase the rigidity of the front part of the vehicle while suppressing an increase in the number of parts.

  According to the third aspect of the present invention, by coupling the vehicle-mounted component to the mounting bracket via the elastic body, the vehicle-mounted component can be used as a mass damper and a dynamic damper to attenuate the vibration of the vehicle body. -And vibration) performance can be improved.

  As described above, the vehicle front structure according to the first aspect of the present invention has an excellent effect of securing an installation space for a headlamp and the like and improving rigidity.

  The vehicle front structure according to the second aspect of the present invention has an excellent effect that the increase in the number of parts can be suppressed and the rigidity of the vehicle front can be efficiently improved.

  The vehicle front structure according to the third aspect of the present invention has an excellent effect that the NV performance can be improved.

1 is a perspective view illustrating an overall configuration of a vehicle front structure according to an embodiment. It is a top view showing the whole vehicle front part structure concerning one embodiment. FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG. 2. (A) is a perspective view which shows the state which attached the vehicle mounting component used for a vehicle front part structure to a mounting bracket, (B) is an exploded perspective view of the site | part which attaches a vehicle mounting component via a rubber mount. (A) is a perspective view which shows the whole structure of the vehicle front part structure which concerns on a 1st comparative example, (B) is a longitudinal cross-sectional view which shows the reinforcement member used for a vehicle front part structure. It is a side view showing the vehicle front part to which the vehicle front part structure concerning the 1st comparative example was applied. (A) is a perspective view which shows the whole structure of the vehicle front part structure which concerns on a 2nd comparative example, (B) is a longitudinal cross-sectional view which shows the reinforcement member used for a vehicle front part structure. (A) is a perspective view which shows a deformation | transformation state when the input of a vehicle upper direction is added to the vehicle front part structure which concerns on a 2nd comparative example, (B) is a front view which shows the deformation | transformation state. (A) is a perspective view which shows a deformation | transformation state when the input of a vehicle downward direction is added to the vehicle front part structure which concerns on a 2nd comparative example, (B) is a front view which shows the deformation | transformation state.

  Hereinafter, an embodiment of a vehicle front structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a perspective view showing the overall configuration of the vehicle front structure according to the present embodiment, and FIG. 2 is a plan view showing the overall configuration of the vehicle front structure. 1 and 2 show one end side in the vehicle width direction, and the other end side in the vehicle width direction is symmetric with respect to the one end side, and thus illustration is omitted. As shown in these drawings, on both sides of the vehicle front portion 10 in the vehicle width direction, front side members 12 as vehicle body skeleton members extending along the vehicle front-rear direction are provided. The front side member 12 is disposed in the lower part of the engine room 14 and has a closed cross-sectional structure. A dash panel 16 is provided on the vehicle rear side of the engine room 14 along the vehicle width direction and the vehicle vertical direction. An upper member (apron upper member) 18 extending along the vehicle front-rear direction is provided diagonally above the front side member 12 on the outer side in the vehicle width direction. The front end 12A of the front side member 12 extends forward of the vehicle from the front end 18A of the upper member 18.

  An apron front panel 20 is bridged between the upper member 18 and the front side member 12 in the engine room 14. A side wall portion 20A is provided on the outer side of the apron front panel 20 in the vehicle width direction along the vehicle vertical direction, and the side wall portion 20A is joined to a side wall portion 18B of the upper member 18 on the inner side in the vehicle width direction. Further, the inner wall portion of the apron front panel 20 in the vehicle width direction is joined to the outer wall portion of the front side member 12 in the vehicle width direction.

  The apron front panel 20 is formed with a front wheel house 22 in which a portion on the inner side in the vehicle width direction from the upper member 18 is bulged in a substantially curved surface on the upper side of the vehicle, and a suspension tower 24 is formed at the top of the front wheel house 22. Is provided.

  The rear side of the upper member 18 in the vehicle front-rear direction has a closed cross-sectional structure, and the front end portion 18A of the upper member 18 has an inverted L shape having an upper surface portion 18C and a side wall portion 18B. A brace 26 as a reinforcing member that connects the front end 18 </ b> A of the upper member 18 and the front side member 12 is disposed under the apron front panel 20. As shown in FIG. 1, the brace 26 extends along the shape of the lower part of the apron front panel 20, and includes a vertical wall portion 26 </ b> A configured with a substantially L-shaped surface when viewed from the front of the vehicle. ing.

  As shown in FIG. 3, the brace 26 is formed of a plate-like member, and forms the above-described vertical wall portion 26A that forms a front surface of the vehicle in a side view of the vehicle and the upper edge portion of the vertical wall portion 26A on the vehicle rear side. And a flange portion 26 </ b> B that is bent at the same time. The flange portion 26B is disposed in surface contact with the lower surface of the apron front panel 20, and is joined by a plurality of spot weldings (see FIG. 1). As shown in FIG. 1, the brace 26 includes an outer side in the vehicle width direction of the side wall portion 20 </ b> A of the apron front panel 20, a lower side of the upper surface portion 18 </ b> C of the upper member 18, and an outer side in the vehicle width direction of the front side member 12. A flange portion 26B is formed by bending the edge portion of the brace 26 toward the rear side of the vehicle at a position in surface contact with the vehicle. And the flange part 26B of the brace 26, the side wall part 20A of the apron front panel 20, the upper surface part 18C of the upper member 18, and the side wall of the front side member 12 are arranged in a surface contact state and joined by a plurality of spot weldings. . That is, as shown in FIG. 3, the brace 26 has an apron front panel 20, an upper surface portion 18 </ b> C of the upper member 18, and the front side member 12 so that the vehicle rear side of the vertical wall portion 26 </ b> A has an open cross section when viewed from the side of the vehicle. Is bound to.

  As shown in FIGS. 1 and 2, a fender bracket 60 is attached to the vehicle width direction outer side end portion of the vertical wall portion 26 </ b> A of the brace 26. The fender bracket 60 is configured by a plate-like member disposed along the vehicle width direction, and the inner end portion 60A in the vehicle width direction is fixed to the vertical wall portion 26A of the brace 26 by a fastener such as welding or a bolt. Has been. A bent portion 60B that is bent toward the front side of the vehicle is formed at an outer end portion of the fender bracket 60 in the vehicle width direction. The bent portion 60B includes a fender panel that forms a side surface of the vehicle front portion 10. (Not shown) is attached.

  On the vehicle rear side of the brace 26, a bracket 30 and a mounting bracket 32 are provided as a connecting member that connects an intermediate portion of the brace 26 in the vehicle width direction and a portion of the front side member 12 on the vehicle rear side of the brace 26. ing. In this embodiment, the “connecting member” is composed of two parts, a bracket 30 and a mounting bracket 32. The mounting bracket 32 is a member for mounting the vehicle-mounted component 40 to the front side member 12 and the apron front panel 20. As the vehicle-mounted component 40, an HV (hybrid) water pump or an ABS (anti-lock brake) actuator originally mounted on the vehicle is used. In the present embodiment, an HV water pump is used. By using the mounting bracket 32 of the vehicle-mounted component 40 that is originally set in the vehicle front portion 10 as the “connection member”, it is possible to suppress an increase in the number of components.

  As shown in FIGS. 1 to 3, the bracket 30 is disposed on the lower side of the apron front panel 20, and the mounting bracket 32 is disposed on the upper side of the apron front panel 20. As shown in FIG. 3, the bracket 30 is obtained by bending an intermediate portion of the plate-like member in the vehicle front-rear direction at two locations, and a vertical wall portion 30A formed at the front end portion in a vehicle side view, An inclined portion 30B formed so as to rise upward from the upper end of the vertical wall portion 30A to the vehicle rear side, and an upper wall portion 30C bent from the rear end of the inclined portion 30B to the vehicle rear side are provided.

  The vertical wall portion 30A of the bracket 30 is arranged on the rear surface of the vertical wall portion 26A of the brace 26 in a surface contact state and is joined by spot welding. The upper wall portion 30C of the bracket 30 is disposed in a surface contact state on the lower surface of the apron front panel 20, and the mounting portion 32B of the mounting bracket 32 is disposed in a surface contact state on the upper surface of the apron front panel 20. The upper wall portion 30C of the bracket 30 and the mounting portion 32B of the mounting bracket 32 are fastened and fixed by bolts 34 and nuts 36. The bracket 30 is joined to the vertical wall portion 26 </ b> A so that the center line in the longitudinal direction is substantially perpendicular to the vertical wall portion 26 </ b> A of the brace 26.

  As shown in FIG. 1 and FIG. 2, the mounting bracket 32 is formed in a substantially triangular shape in a plan view of the vehicle, and the center line in the longitudinal direction is relative to the surface direction of the vertical wall portion 26 </ b> A of the brace 26. It arrange | positions in the direction which cross | intersects, and is arrange | positioned in the direction which cross | intersects with respect to the axial direction of the front side member 12. FIG. The mounting bracket 32 is formed in a substantially cross-sectional hat shape when viewed from the front of the vehicle, and is disposed so as to protrude upward from the vehicle. More specifically, the mounting bracket 32 includes a planar upper surface portion 32A formed with an intermediate portion protruding upward of the vehicle, and the mounting portion formed at the top of a substantially triangular shape on the outer side in the vehicle width direction of the upper surface portion 32A. 32B, and an attachment portion 32C that is formed on one side facing the attachment portion 32B and attached to the upper surface portion 12B of the front side member 12.

  The mounting portion 32C of the mounting bracket 32 is disposed in surface contact with the upper surface portion 12B of the front side member 12, and is fastened and fixed to the upper surface portion 12B by bolts 38 and nuts (not shown) at two locations in the vehicle front-rear direction. ing. Due to the two parts of the mounting bracket 32 and the bracket 30, the intermediate portion in the vehicle width direction of the vertical wall portion 26 </ b> A of the brace 26 and the upper surface portion 12 </ b> B on the vehicle rear side from the brace 26 of the front side member 12 are substantially oblique in a vehicle plan view. It is connected in the direction (direction intersecting with the vertical wall portion 26A). By making the brace 26 connecting the front end portion 18A of the upper member 18 and the front side member 12 into an open cross section in a side view of the vehicle, the cross-sectional dimension of the brace 26 in the vehicle front-rear direction is reduced. As a result, an intermediate space in the vehicle width direction of the brace 26 and the upper surface portion 12B of the front side member 12 are connected by the two parts of the bracket 30 and the mounting bracket 32 while securing an installation space for a headlamp or the like in the vehicle front portion 10. As a result, the rigidity of the vehicle front portion 10 is improved.

  As shown in FIGS. 4A and 4B, the vehicle mounting component 40 is coupled to the upper surface portion 32A of the mounting bracket 32 via a rubber mount 42 as an elastic body. At the lower part of the main body portion 40A constituting the vehicle-mounted component 40, attachment portions 40B extending outward in the radial direction are formed at three locations around the main body portion 40A in a vehicle plan view. Between the mounting portion 40B and the upper surface portion 32A of the mounting bracket 32, the vehicle-mounted component 40 is attached to the upper surface portion 32A with bolts 44 and nuts 46 with a rubber mount 42 interposed therebetween. By mounting the vehicle-mounted component 40 on the upper surface portion 32A of the mounting bracket 32 via the rubber mount 42, the vehicle-mounted component 40 is used as a mass damper and a dynamic damper to attenuate vibrations.

  Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1 and the like, a brace 26 is provided to join the front end member 18A of the upper member 18 and the front side member 12 in an open cross section in a side view of the vehicle, and the vehicle of the brace 26 (vertical wall portion 26A). The cross-sectional dimension in the front-rear direction is reduced. For this reason, installation space, such as a headlamp, can be ensured in the vehicle front part 10. Further, by connecting the vehicle width direction middle portion of the vertical wall portion 26A of the brace 26 and the upper surface portion 12B on the vehicle rear side from the brace 26 of the front side member 12 by the bracket 30 and the mounting bracket 32 of the vehicle mounting component 40, The deformation of the brace 26 with respect to the vertical input of the vehicle can be suppressed, and the rigidity of the vehicle front portion 10 can be improved.

  Moreover, by connecting the vehicle width direction intermediate part of the vertical wall part 26A of the brace 26 and the upper surface part 12B of the front side member 12 using the mounting bracket of the vehicle mounting component 40 that is originally set as the mounting bracket 32, The rigidity of the vehicle front portion 10 can be efficiently improved while suppressing an increase in the number of parts.

  Further, since the vehicle-mounted component 40 is attached to the upper surface portion 32A of the mounting bracket 32 via the rubber mount 42, the vehicle-mounted component 40 can be used as a mass damper and a dynamic damper to attenuate vibrations and improve NV performance. Can be made.

  On the other hand, FIG. 5 shows a vehicle front portion 100 of the first comparative example. The vehicle front portion 100 is provided with a reinforcing member 102 that connects the front end portion 18A of the upper member 18 and the front side member 12, and the reinforcing member 102 is formed in a cross-sectional hat shape in a side view of the vehicle. A pair of front and rear flange portions 102A of the reinforcing member 102 are joined to the lower surface and the side wall portion 20A of the apron front panel 20, the side wall portions 18B and the upper surface portion 18C of the upper member 18, and the side wall portions of the front side member 12 by a plurality of spot weldings. Thus, a closed cross-sectional structure is formed.

  In the vehicle front portion 100 of the first comparative example, the reinforcing member 102 has a closed cross-sectional structure when viewed from the side of the vehicle, and has many welding points, and therefore has durability. Furthermore, although the reinforcing member 102 has an advantage that the displacement of the upper member 18 is suppressed and the rigidity is high, the cost increases due to a large number of welding points and the mass increases. Further, as shown in FIG. 6, since the pair of front and rear flange portions 102A of the reinforcing member 102 are joined to the apron front panel 20 and the like, the cross-sectional dimension of the reinforcing member 102 in the vehicle front-rear direction is increased. For this reason, if a clearance between the front tire 106 and the reinforcing member 102 is secured in the vehicle front portion 100, the installation space for the headlamp 104 is reduced, and the design for preventing the reinforcing member 102 and the headlamp 104 from interfering with each other. The restriction of becomes large. Furthermore, although the deformation of the reinforcing member 102 is small, vibration is difficult to attenuate.

  FIG. 7 shows a vehicle front portion 120 of the second comparative example. The vehicle front portion 120 is provided with a brace 26 having a plate-like vertical wall portion 26A that connects the front end portion 18A of the upper member 18 and the front side member 12, but the vertical portion of the brace 26 as in this embodiment is provided. A connecting member that connects the vehicle width direction intermediate portion of the wall portion 26A and the front side member 12 is not provided.

  In the vehicle front portion 120 of the second comparative example, the vertical wall portion 26A of the brace 26 has an open cross section in a side view of the vehicle, and the cross-sectional dimension of the vertical wall portion 26A in the vehicle front-rear direction is small. Compared to the example, the space of the headlamp 104 (see FIG. 6) increases. Further, the number of welding points of the brace 26 is small, the mass of the brace 26 is reduced, and the cost can be reduced. However, as shown in FIG. 8, when an input is applied in the upward direction of the vehicle, the brace 26 is deformed in an extending direction, and is easily cut after endurance. Further, as shown in FIG. 9, the brace 26 is easily bent and deformed when an input is applied in the downward direction of the vehicle. In addition, the NV performance is reduced due to the increased displacement of the brace 26. In FIGS. 8 and 9, in order to easily understand the deformation state of the brace 26, it is schematically shown larger than the actual deformation.

  On the other hand, in the vehicle front portion 10 of the present embodiment, the deformation of the brace 26 with respect to the vertical input of the vehicle is suppressed by the bracket 30 and the mounting bracket 32 of the vehicle mounting component 40, so that the durability strength is improved. In addition, the deformation of the brace 26 can be suppressed by the bracket 30 and the mounting bracket 32 of the vehicle-mounted component 40 even with respect to the vehicle longitudinal direction input by the fender bracket 60. Further, the vehicle width direction intermediate portion of the vertical wall portion 26 </ b> A of the brace 26 and the upper surface portion 12 </ b> B of the front side member 12 are connected by the bracket 30 and the mounting bracket 32 of the vehicle mounting component 40, so that the rigidity of the vehicle front portion 10 is achieved. Becomes higher. Furthermore, since the number of welding points of the brace 26 is small, the mass of the brace 26 is small, and the bracket 30 and the mounting bracket 32 are small, an increase in mass can be suppressed and an increase in cost can be suppressed.

  Further, the vehicle front portion 10 of the present embodiment vibrates using the vehicle mounted component 40 as a mass damper and a dynamic damper because the vehicle mounted component 40 is attached to the upper surface portion 32A of the mounting bracket 32 via the rubber mount 42. It can be attenuated and NV performance can be improved.

  In the above embodiment, the vehicle width direction intermediate portion of the vertical wall portion 26A of the brace 26 and the upper surface portion 12B of the front side member 12 on the vehicle rear side with respect to the brace 26 are connected by two parts of the bracket 30 and the mounting bracket 32. However, it is not limited to this, For example, you may connect with the connection member which consists of one component. At that time, the connecting member preferably connects the intermediate portion of the brace 26 in the vehicle width direction and the upper surface portion 12B of the front side member 12 on the vehicle rear side of the brace 26 in a direction intersecting the surface direction of the brace 26. . Further, the connecting member may be arranged on the apron front panel 20 on the vehicle upper side or on the apron front panel 20 on the vehicle lower side.

  Moreover, in the said embodiment, although the attachment bracket 32 of the vehicle mounting component 40 was used as a connection member, it is not limited to this, You may use a connection member for exclusive use.

  Moreover, in the said embodiment, although the brace 26 is provided with the flange part 26B bent to the vehicle rear side, it is not limited to this, For example, the flange part bent to the vehicle front side is set to the apron front panel 20. The structure which joins may be sufficient.

  Moreover, in the said embodiment, although the vehicle mounting component 40 is attached to the attachment bracket 32 via the rubber mount 42, it may replace with the rubber mount 42 and may use elastic bodies, such as a foamed resin and a spring member.

12 Front side member (body frame member)
18 Upper member 18A Front end 26 Brace (reinforcing member)
26A Vertical wall (vehicle front side surface)
30 Bracket (connecting member)
32 Mounting bracket (connecting member)
40 Vehicle-mounted parts 42 Rubber mount (elastic body)

Claims (3)

A vehicle body skeleton member disposed along the vehicle longitudinal direction;
An upper member provided on the outer side in the vehicle width direction of the vehicle body skeleton member and disposed along the vehicle longitudinal direction;
A plate-like reinforcing member having a front surface of the vehicle that joins the vehicle front end portion of the upper member and the vehicle body skeleton member at a vehicle front side in an open cross section in a vehicle side view;
A connecting member that connects an intermediate portion of the reinforcing member in the vehicle width direction and the vehicle body skeleton member in a direction intersecting the reinforcing member;
A vehicle front structure having:   The vehicle front structure according to claim 1, wherein the connecting member is one or more parts including an attachment bracket for attaching a vehicle-mounted part.   The vehicle front part structure according to claim 2, wherein the vehicle mounting component is coupled to the mounting bracket via an elastic body.

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