JP2018167761A - Vehicle body structure of vehicle - Google Patents

Abstract

To provide a new vehicle body structure of a vehicle which efficiently releases an input load input to strut towers to a vehicle body while improving rigidity between the strut towers and contributes to improvement of steering stability.SOLUTION: A vehicle body structure of a vehicle 1 according to the invention includes: strut towers 5 of a vehicle 1 to which a suspension 40 is attached; a dash panel 6 which extends in a vertical direction Z of the vehicle 1 and is disposed at the vehicle rear side X2 relative to the strut towers 5; a cowl top 9 which is disposed above the strut towers 5 and in front of the dash panel 6; and brackets 10 disposed in front of the strut towers 5 and the cowl top 9. A rear part 5a of the strut tower 5 is joined to a front surface 6a of the dash panel 6, and a front end part 5c1 of the strut tower 5 and a front edge part 92b of the cowl top 9 are connected by the bracket 10.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle body structure of a vehicle.

A substantially cylindrical strut tower to which a suspension for buffering an input load from the road surface is attached via left and right wheels is disposed in the vehicle in the vehicle width direction (left and right). Each strut tower needs to have sufficient rigidity because it needs to support the strut tower in a fixed position against an input load acting on the suspension during traveling and to ensure steering stability.
For this reason, the front end of the cowl top that extends in the vehicle width direction and has a rear end side coupled to a dash panel that is a skeleton member of a vehicle body arranged on the vehicle rear side of the strut tower, and a rear end of the strut tower There has been proposed a vehicle body structure in which an input load is released from a bracket to a vehicle width direction via a cowl top while increasing the rigidity between the strut towers by being connected via a bracket (for example, Patent Document 1).

JP 2013-47061 A

In the configuration of Patent Document 1, the input load is released in the vehicle width direction from the bracket through the cowl top while increasing the rigidity between the strut towers, but there are various vehicle body structures. Improvement is demanded.
It is an object of the present invention to provide a new vehicle body structure that contributes to the improvement of steering stability by efficiently escaping the input load input to the strut tower to the vehicle body while increasing the rigidity between the strut towers. And

  In order to achieve the above object, a vehicle body structure according to the present invention includes a strut tower of a vehicle to which a suspension is attached, a dash panel that extends in the vertical direction of the vehicle, and is disposed behind the strut tower. The strut tower includes a cowl top disposed above the strut tower and in front of the dash panel, and a bracket disposed in front of the strut tower and the cowl top. The front end of the cowl top and the front edge of the cowl top are connected by a bracket.

  According to the present invention, since the cowl top bracket that connects the front edge portion of the cowl top and the front end portion of the strut tower is provided, and the rear portion of the strut tower is connected to the front portion of the dash panel, the rigidity between the strut towers is increased. Thus, the input load input to the strut tower can be efficiently released to the vehicle body, and a new vehicle body structure that contributes to improved steering stability can be provided.

The perspective view explaining the schematic structure of the vehicle body structure of the vehicle concerning the embodiment of the present invention. Sectional drawing explaining the structure and assembly | attachment process of the cowl top bracket and cowl top used as the principal part of the vehicle body structure of embodiment of this invention, a strut tower, and a dash panel. Sectional drawing explaining the structure and assembly | attachment process of the cowl top bracket used as the principal part of the vehicle body structure of the vehicle which concerns on embodiment of this invention, and a cowl top. The perspective view explaining the structure of a cowl top bracket. The front view explaining the structure of a cowl top bracket. The side view explaining the structure of a cowl top bracket. The enlarged front view explaining the coupling | bonding state of a cowl top bracket, a cowl top, and a strut tower. The expansion perspective view explaining the combined state of a cowl top bracket, a cowl top, a strut tower, and an upper frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments for carrying out the invention, the same members and members having the same functions are denoted by the same reference numerals, and redundant description is omitted. The drawings may be partially omitted to facilitate understanding of some configurations.
As shown in FIG. 1, in the vehicle body structure of the vehicle 1 according to the present embodiment, a space portion 4 surrounded by a plurality of skeleton members constituting the vehicle body is formed in the front portion 2 of the vehicle 1. In the space 4, a drive system such as an engine or a motor is mounted, although it varies depending on the vehicle type. In the space 4, strut towers 5 to which suspension struts 40 (see FIGS. 2 and 3) are respectively attached are provided in the vehicle width direction (left-right direction) W.
The strut tower 5 is a skeletal member whose rear part 5 a separates the space 4 and the vehicle interior, extends in the vertical direction Z of the vehicle 1, and is a dash panel 6 that is disposed in the vehicle rear X 2 with respect to the strut tower 5. Are fixed to the front surface 6a by spot welding. Each strut tower 5 is formed in a cylindrical shape by combining a plurality of pressed steel plates, and a strut 40 is fixed to the upper portion 5b as shown in FIGS. Since the upper part 5b becomes an input part from the strut 40, it is formed thicker than other parts. The upper part 5b is formed in a cup shape, and has an inclined part 5c whose corner part is inclined toward the center of the strut tower 5 in such a direction that its cross section is reduced. A plurality of attachment holes 11 </ b> A are formed in the front portion 5 c 1 (the front end portion of the strut tower 5) in the inclined portion 5 c of the strut tower 5 at intervals in the vehicle width direction W. In this embodiment, two mounting holes 11A are formed.
As shown in FIG. 1, an upper frame 7 as a frame extending in the vehicle longitudinal direction X is provided outside the strut tower 5 in the main width direction W. The rear end of the upper frame 7 is connected to ends 6 b and 6 c on the outer side in the vehicle width direction of the dash panel 6. Below the upper frame 7 and the strut tower 5, side frames 8, 8 that are arranged in the vehicle width direction W and extend in the vehicle longitudinal direction X are provided. The dash panel 6 is also connected to the side frames 8 and 8.

A cowl top 9 is disposed above the strut tower 5 and in front of the dash panel 6. The cowl top 9 extends in the vehicle width direction W and is a member for receiving water flowing down the front glass 3 and is disposed so as to straddle between the strut towers 5 and 5. As shown in FIGS. 2 and 3, the cowl top 9 includes a metal first cowl top 91 whose rear end 91 a is fixed to the dash panel 6 by welding, and a vehicle front X 1 from the first cowl top 91. And a second cowl top 92 disposed on the side. The second cowl top 92 is made of metal and is separate from the first cowl top 91, and is configured to be detachable from the first cowl top 91, each strut tower 5, and the upper frames 7, 7. Yes.
The second cowl top 92 constitutes a cowl top panel that is outfitted with respect to the first cowl top 91. The cowl top 9 is separated from the first cowl top 91 so that the attachment portion 41 of the strut 40 attached to the upper portion 5 b of the strut tower 5 is exposed in the space 4. The size ratio is set. The first cowl top 91 and the second cowl top 92 are extended in the vehicle width direction W. A rear portion 92a of the second cowl top 92 is connected to the front portion 91b of the first cowl top 91 by a bolt 23 and a nut 24 as fastening members.
A vertical wall portion 92 c extending from the front edge portion 92 b in the vertical direction Z of the vehicle 1 is formed on the front edge portion (front edge portion of the cowl top) 92 b of the second cowl top 92. In the present embodiment, the vertical wall portion 92c is formed as a substantially vertical surface by bending the vehicle body upward Z1, which is a direction intersecting the vehicle width direction W. By bending the front edge portion 92b in this manner, a ridge line continuously connected to the bent portion in the vehicle width direction W is formed, so that the surface rigidity of the vertical wall portion 92c is increased. The method of forming the vertical wall portion 92c is not limited to the bending process. A plurality of attachment holes 12 </ b> A are formed in the vertical wall portion 92 c so as to penetrate the vertical wall portion 92 c in the front-rear direction X at intervals in the vehicle width direction W. In the present embodiment, two attachment holes 12A are formed in the vehicle width direction W (left and right). 2 and 3, only one mounting hole 12A is shown.

  In the vehicle body structure according to this embodiment, as shown in FIG. 1, cowl top brackets 10 as brackets are arranged one by one in the vehicle width direction W. As shown in FIGS. 2 and 3, the cowl top bracket 10 is respectively attached to the vertical wall portion 92 c of the second cowl top 92, the front portion 5 c 1 of the left and right strut towers 5, and the inner side surfaces 7 a of the left and right upper frames 7 and 7. It is attached by being fastened. Since the cowl top brackets 10 and 10 have the same configuration except that they are formed symmetrically, the configuration and attachment of one cowl top bracket 10 will be described below.

The cowl top bracket 10 is made of sheet metal, and as shown in FIGS. 4 and 5, a first mounting surface 10b is formed on the upper portion 10a along the vertical wall portion 92c. A plurality of mounting holes 13A penetrating the first mounting surface 10b in the vehicle front-rear direction X are formed in the first mounting surface 10b at intervals in the vehicle width direction W. A bolt 20 as a fastening member is inserted into the mounting hole 13A substantially horizontally from the vehicle front X1. The upper part 10a of the cowl top bracket 10 is joined to the vertical wall part 92c.
A second mounting portion 10 d is formed on the lower portion 10 c of the cowl top bracket 10 so as to follow the external shape of the upper portion 5 b (front portion 5 c 1) of the strut tower 5. The second mounting portion 10d is formed with a plurality of mounting holes 13B that pass through the second mounting portion 10d obliquely toward the vehicle rear X2 at intervals in the vehicle width direction W. Bolts 20 are inserted into the mounting holes 13B obliquely from the front X1 of the vehicle. That is, the lower part 10c of the cowl top bracket 10 is disposed along the front part 5c1 of the strut tower 5, and is joined and fixed from the front of the vehicle 1 downward.
In the present embodiment, two attachment holes 13A and two attachment holes 13B are formed. The mounting hole 13A and the mounting hole 13B are arranged so that their positions are shifted from each other in the vehicle width direction W. That is, the mounting holes 13A and the mounting holes 13B are arranged so that their positions are alternated in the vehicle width direction W when viewed from the vehicle front X1 side. Each attachment hole 13A is formed in alignment with each attachment hole 12A of the vertical wall portion 92c. Each mounting hole 13 </ b> B is formed in alignment with each mounting hole 11 </ b> A of the strut tower 5.
A third mounting portion 10e is formed on the upper portion 10a of the cowl top bracket 10 so as to be bent along the inner side surface 7a of the upper frame 7 by being bent in a direction intersecting the first mounting surface 10b, for example, the vehicle front X1. Has been. The third mounting portion 10e is an end portion on the outer side in the vehicle width direction of the cowl top bracket 10 and is aligned with a mounting hole 14 (see FIG. 7) formed in the inner side surface 7a of the upper frame 7. A mounting hole 13C is formed. Bolts 20 are inserted into the mounting holes 13C from the vehicle inner side toward the vehicle outer side in the vehicle width direction W. The outer end of the cowl top bracket 10 in the vehicle width direction is joined to the upper frame 7.
The cowl top bracket 10 can be fastened and fixed by bolts 20 from different directions to the cowl top 9 (second cowl top 92), the strut tower 5 and the upper frame 7 connected thereto. Further, the cowl top bracket 10 functions as a connecting member that is fastened and fixed to three members of the strut tower 5, the upper frame 7, and the cowl top 9 and supported from three directions. That is, in this embodiment, the direction in which the upper part 10a of the cowl top bracket 10 and the cowl top 9 (the vertical wall part 92c of the second cowl top 92) are joined, the lower part 10c of the cowl top bracket 10, and the strut tower 5 are It is different from the direction of joining.

In such a configuration, as shown in FIG. 2, the cowl top bracket 10 has the mounting hole 13 </ b> A in a state where the first mounting surface 10 b is joined to the outer side surface (the surface located on the vehicle front side) of the vertical wall portion 92 c. And the mounting hole 12A are aligned. Then, the bolt 20 as a fastening member is passed through the mounting hole 13A and the mounting hole 12A and tightened into the nut 21 located on the vertical wall portion 92c. For this reason, the vertical wall portion 92c (the vertical wall portion of the cowl top) of the second cowl top 92 and the upper portion 10a of the cowl top bracket 10 are arranged in the longitudinal direction X of the vehicle 1 and are fastened and fixed.
As shown in FIG. 3, the cowl top bracket 10 positions the mounting holes 13 </ b> B and the mounting holes 11 </ b> A in a state where the second mounting portion 10 d is joined to the outside of the front portion 5 c 1 of the strut tower 5 from the vehicle front X1 side. Match. Then, the bolt 20 is inserted into the mounting hole 13B and the mounting hole 11A from the front X1 of the vehicle and tightened to the nut 21 located on the strut tower 5 side, so that the lower part 10c is fastened and fixed to the front part 5c1 of the strut tower 5 respectively. Is done.
As shown in FIGS. 7 and 8, the cowl top bracket 10 aligns the mounting holes 13 </ b> C and the mounting holes 14 in a state where the third mounting portion 10 e is joined to the inner side surface 7 a of the upper frame 7. Then, the bolt 10 is inserted into the mounting hole 13C and the mounting hole 14 from the inside of the vehicle and fastened to the nut 21 on the upper frame 7 side, whereby the upper portion 10a is fastened and fixed to the upper frame 7 respectively.

That is, each cowl top bracket 10 is interposed and fixed between both the upper frame 7 and the strut tower 5 and between the second cowl top 92 (the cowl top 9) and the strut tower 5. The bending rigidity and compression rigidity of the cowl top itself can be increased. For this reason, each cowl top bracket 10 constitutes a first transmission path D1 that allows the input load F to escape to the opposite side of the vehicle body via the second cowl top 92 (the cowl top 9).
As shown in FIGS. 2 and 3, the rear portion 5 a of each strut tower 5 is welded and fixed to the dash panel 6, so the second transmission for releasing the input load F from the strut tower 5 to the dash panel 6. A path D2 is configured.
As shown in FIGS. 7 and 8, the cowl top bracket 10 has the third attachment portion 10 e fastened and fixed to the inner side surface 7 a of the upper frame 7, so that the input load F from the strut tower 5 is applied to the upper frame 7. A third transmission path D3 is formed.

  According to the present embodiment, the cowl top bracket 10 that connects the front edge portion 92b of the cowl top 9 and the front portion 5c1 of the strut tower 5 is provided in the vehicle width direction W, and the rear portion 5a of the strut tower 5 is disposed on the vehicle 1. Since it is connected to the front portion 6a of the dash panel 6 constituting the skeleton member, the input load F from the road surface input via the strut tower 5 can be efficiently released to the vehicle body while enhancing the rigidity between the strut towers. Thus, it is possible to provide a new vehicle body structure of the vehicle 1 that contributes to improvement in steering stability.

  According to the present embodiment, the cowl top bracket 10 is connected to at least the upper frame 7 that is located in the vehicle width direction W and is connected to at least the dash panel 6 from the inner side in the vehicle width direction. The input load F from the road surface can be released to the vehicle body more efficiently.

According to the present embodiment, the vertical wall portion 92c that is bent and extended in the vertical direction Z intersecting the vehicle width direction W is formed on the front edge portion 92b of the cowl top 9, and the surface rigidity is enhanced. Since the upper portion 10a of the cowl top bracket 10 is connected to the vertical wall portion 92c, the mounting rigidity can be increased and the input load F can be more efficiently released to the vehicle body. Further, since the bolts 20 can be fastened from the front X1 of the vehicle, workability is good and insufficient fastening force can be suppressed, so that the rigidity of the cowl top bracket 10 and the cowl top 9 can be ensured, and the input load F can be made more efficient. I can escape to the car body well.
According to the present embodiment, the cowl top bracket 10 is fastened and fixed by the bolts 20 from different directions to the cowl top 9 (second cowl top 92), the strut tower 5 and the upper frame 7 that are connected to the cowl top bracket 10 respectively. That is, there are a direction in which the upper part 10a of the cowl top bracket 10 and the cowl top 9 (the wall part 92c of the second cowl top 92) are joined, and a direction in which the lower part 10b of the cowl top bracket 10 and the strut tower 5 are joined. Different. For this reason, the mounting rigidity can be ensured even with respect to the input load F from various directions with respect to the strut tower 5, the input load F can be released to the vehicle body side more efficiently, and it contributes to the improvement of the steering stability. it can.

In the present embodiment, the plurality of mounting holes 13A formed in the upper portion 10a of the cowl top bracket 10 and the plurality of mounting holes 13B formed in the lower portion 10c of the cowl top bracket 10 are shifted from each other in the vehicle width direction W. (So as to stagger). For this reason, the pitch of the fixing point at which the cowl top bracket 10 is fastened and fixed to the cowl top 9 (second cowl top 92) and the strut tower 5 by the bolt 20 can be narrowed in the vehicle width direction W. As a result, the mounting rigidity of the cowl top bracket 10 can be increased, and the steering stability can be improved.
In this embodiment, the lower part 10c of the cowl top bracket 10 is fastened with the bolt 20 to the upper part 5b of the strut tower 5 having a large plate thickness, so that attachment rigidity is obtained. Compared to the case where the lower part 10c of the cowl top bracket 10 is fixed to the upper part 5b of the strut tower 5 by welding. Since the surface accuracy required for the upper portion 5b serving as the mounting surface may be low, the cowl top bracket 10 can be securely fixed to the strut tower 5 even when a product error occurs in the cowl top bracket 10.

In the present embodiment, the cowl top bracket 10 is disposed above the strut tower 5 and in front of the dash panel 6, so that the length in the vehicle longitudinal direction X can be shortened at the front portion 2 of the vehicle 1. This can reduce the size of the vehicle 1.
The cowl top 9 is formed so that the mounting portion 41 of the strut 40 is exposed in the space 4 when the second cowl top 92 is detached from the first cowl top 91, so that the vehicle 1 can be made compact. Workability at the time of replacement of the strut 40 can be ensured.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and the present invention described in the claims is not specifically limited by the above description. Various modifications and changes are possible within the scope of the above.
For example, in the above-described embodiment, the vertical wall portion 92c is formed by bending the vehicle body upward Z1 as a direction intersecting the vehicle width direction W, but may be formed by bending the vehicle body downward Z2.
In the present embodiment, the second cowl top 92 is made of metal from the viewpoint of strength. However, when a member capable of obtaining sufficient strength such as engineering plastic is used, it is made of resin instead of metal. Also good.

  The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 5 ... Strut tower, 5a ... Rear part of strut tower, 5c1 ... Front end part of strut tower, 6 ... Dash panel, 6a ... Front part, 6b, 6c ..Outer ends in the vehicle width direction, 7 ... frame, 9 ... cowl top, 10 ... bracket, 10a ... upper part of the cowl top bracket, 10c ... lower part of the cowl top bracket, 10e・ ・ ・ End of the bracket in the vehicle width direction, 20 ・ ・ ・ Fastening member, 40 ・ ・ ・ Suspension, 91 ・ ・ ・ First cowl top, 91 a ・ ・ ・ Rear end of cowl top, 92 ・ ・ ・Second cowl top, 92b ... front edge of cowl top, 92c ... vertical wall, F ... input load, W ... vehicle width direction, X2 ... vehicle rear, Z ... Vertical direction

Claims (7)

A strut tower of the vehicle to which the suspension is attached,
A dash panel that extends in the vertical direction of the vehicle and is arranged behind the strut tower,
A cowl top disposed above the strut tower and in front of the dash panel;
A bracket disposed in front of the strut tower and the cowl top;
The rear part of the strut tower and the front surface of the dash panel are joined,
A vehicle body structure for a vehicle, wherein a front end portion of the strut tower and a front edge portion of the cowl top are connected by the bracket. It has a frame that extends in the longitudinal direction of the vehicle,
The vehicle body structure according to claim 1, wherein an end portion of the dash panel on the outer side in the vehicle width direction and an end portion of the bracket on the outer side in the vehicle width direction are joined to the frame. The vehicle body structure according to claim 1 or 2, wherein a direction in which the upper portion of the bracket and the cowl top are joined is different from a direction in which the lower portion of the bracket and the strut tower are joined. The cowl top has a vertical wall portion extending in the vertical direction of the vehicle from the front edge portion of the cowl top,
The vehicle body structure according to any one of claims 1 to 3, wherein an upper portion of the bracket is joined to the vertical wall portion. 5. The vehicle body structure according to claim 4, wherein the vertical wall portion of the cowl top and the upper portion of the bracket are arranged in a longitudinal direction of the vehicle and fastened and fixed. The lower part of the bracket is disposed along a front part of the strut tower, and is joined downward from the front of the vehicle. Vehicle body structure. The cowl top is
A first cowl top coupled to the dash panel;
A second cowl top disposed forward of the first cowl top;
The vehicle body structure according to any one of claims 1 to 6, wherein the second cowl top is detachable with respect to the first cowl top and the cowl top bracket. .

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