JP2014213764A - Vehicle body front part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body front part structure which reduces intrusion of a front wheel tire to an occupant space by abutting the front wheel tire on a tire stopper on an outer side of a side frame at a time of collision of a vehicle, and can sufficiently transmit a load to a vehicle body rear part at a time of frontal collision of the vehicle.SOLUTION: A tire stopper 13 is mounted on an outer side of a side member 1, and a cabin mounting bracket 17 is mounted on an outer side of the tire stopper. A lower end part of a front pillar 77 is connected to the cabin mounting bracket. A lower end part of a rear pillar is connected to a backside cabin mounting bracket 11. When a vehicle crashes head-on at one side of the vehicle in a vehicle width direction, the front wheel tire 15 interferes with the tire stopper and receives a load. The collision load is transmitted from the side member to a central cross member 3 directly, and is transmitted to the central cross member through a connection member 9 of the side member and a front cross member 7. The collision load is transmitted to the front pillar through the cabin mounting bracket.

Description

  The present invention relates to a vehicle body front structure that transmits a collision load received by a front wheel to the rear of a vehicle body at the time of a frontal collision of the vehicle.

  A vehicle body front structure is known that reduces the intrusion of a front wheel tire into a passenger space by bringing a front wheel tire into contact with a tire stopper provided outside a side frame at the time of a vehicle collision (see Patent Document 1 below). .

Japanese Patent No. 3730030

  However, in the above-described conventional vehicle body front structure, the front tire contacts the tire stopper, the side frame to which the tire stopper is attached is damaged, and the load transmission to the rear of the vehicle body is not sufficient. Improvement is desired.

  Therefore, an object of the present invention is to ensure sufficient load transmission to the rear of the vehicle body at the time of a frontal collision of the vehicle.

  In the present invention, the load receiving member is connected to the outer side in the vehicle width direction of the side member, and at the lower end of at least one of the first pillar and the second pillar located behind the first pillar in the vehicle body. The front wheels are retracted and interfere with the load receiving member at the time of a frontal collision of the vehicle.

  According to the present invention, the load receiving member that is connected to the side member and interferes with the front wheel retreating at the time of a frontal collision of the vehicle is connected to at least one of the first pillar and the second pillar. The load at the time of collision is efficiently transmitted from the side member to the rear of the vehicle body via at least one of the first pillar and the second pillar, and the load is sufficiently transmitted to the rear of the vehicle body at the time of a frontal collision of the vehicle. It will be something.

FIG. 1 is a plan view showing a vehicle body front part structure according to an embodiment of the present invention. FIG. 2 is a plan view showing the internal structure of the tire stopper corresponding to FIG. FIG. 3 is a perspective view of the periphery of the tire stopper taken along the line III-III in FIG. FIG. 4 is a perspective view around the tire stopper of FIG. FIG. 5 is a perspective view of the periphery of the tire stopper of FIG. 6 is a perspective view of the periphery of the tire stopper viewed from the rear side of the vehicle body with respect to FIG. FIG. 7 is a perspective view showing a state in which a leading arm is attached to FIG. FIG. 8 is a simplified side view of a vehicle with a frame including the vehicle body front structure shown in FIG.

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

  FIG. 1 is a plan view of a vehicle body front structure according to an embodiment of the present invention, and a direction indicated by an arrow FR in FIG. In FIG. 1, a pair of left and right side members 1 are extended in the longitudinal direction of the vehicle body on both sides (outside) in the vehicle width direction corresponding to the vertical direction. The side member 1 is curved so that the distance between the pair of left and right members on the front side of the vehicle body is narrow and gradually increases toward the rear of the vehicle body.

  That is, the pair of left and right side members 1 are between the front part 1a having a small distance between each other, the rear part 1b having a large distance between each other, and the front part 1a and the rear part 1b, and are inclined with respect to the longitudinal direction of the vehicle body. And an inclined portion 1c. Near the boundary between the rear portion 1b and the inclined portion 1c of the pair of left and right side members 1 are connected to each other by the central cross member 3, and the rear portions 1b behind the central cross member 3 are connected to each other by the rear cross member 5. ing.

  In addition, a front cross member 7 is connected between the vicinity of the boundary portion between the front portion 1a and the inclined portion 1c of the pair of left and right side members 1, and the front cross member 7 is rearward from the vicinity of the side member 1. The rear end of the extending connecting member 9 is connected to the central cross member 3. The connecting member 9 is inclined with respect to the longitudinal direction of the vehicle body so that the vehicle body rear side end portion is inward of the vehicle width direction inner side than the vehicle body front side end portion.

  The above-described side member 1 and the three cross members 3, 5, 7 and the like constitute a frame that is positioned at the bottom of the vehicle body and serves as a skeleton member of the vehicle body. A cabin (body) 10 as a member is attached. That is, the vehicle of this embodiment is a vehicle with a frame. In FIG. 1, a region A indicated by a two-dot chain line ellipse substantially corresponds to an occupant space including the passenger compartment, and a region B in front of the region is an engine room.

  On the outside of the side member 1 at a position corresponding to the rear cross member 5 on the rear side of the vehicle body, a cabin mounting bracket 11 serving as a rear mounting member for mounting the above-described cabin 10 projects outward in the vehicle width direction. Provided. When the cabin 10 is attached to the frame such as the side member 1, in addition to the cabin mounting bracket 11, a plurality of other cabin mounting brackets are provided along the longitudinal direction of the vehicle body (here, three locations including the cabin mounting bracket 11 in the longitudinal direction). , There are 6 places in total)

  And in this embodiment, the tire stopper 13 as a load receiving member is attached to the vehicle width direction outer side from the front part 1a of the side member 1 to the rear part 1b through the inclination part 1c. A front wheel tire 15 is located in front of the vehicle body of the tire stopper 13. A cabin mounting bracket 17 that is one of the plurality of cabin mounting brackets is integrally joined and fixed to the outer side of the tire stopper 13 on the vehicle body front side in the vehicle width direction. A remaining cabin mounting bracket 69 (FIG. 8) is provided on the side member 1 in front of the vehicle body of the cabin mounting bracket 17.

  As shown in FIG. 3, the tire stopper 13 includes a leading arm mounting bracket 19 described later on the side member 1 side. The leading arm mounting bracket 19 includes an outer surface portion 19a on the outer side in the vehicle width direction, an upper surface portion 19b that bends and extends inward in the vehicle width direction from the upper end of the outer surface portion 19a, and an inner side in the vehicle width direction from the lower end of the outer surface portion 19a. And has a lower surface portion 19c that bends and extends toward the outside, and has a U-shaped cross section that opens in the vehicle width direction as a whole.

  The upper surface portion 19 b of the leading arm mounting bracket 19 is bent upward in the middle, and the tip on the inner side in the vehicle width direction is joined and fixed to the upper surface of the side member 1. The tip of the lower surface portion 19 c of the leading arm mounting bracket 19 on the inner side in the vehicle width direction is fixedly bonded to the lower surface of the side member 1. That is, the leading arm mounting bracket 19 is attached to the side member 1 so as to be sandwiched vertically from the outside in the vehicle width direction.

  The tire stopper 13 includes an outer surface portion 13a on the outer side in the vehicle width direction, an upper surface portion 13b that extends and bends from the upper end of the outer surface portion 13a toward the inner side in the vehicle width direction, and an inner side in the vehicle width direction from the lower end of the outer surface portion 13a. It has a U-shaped cross section that has a lower surface portion 13c that bends and extends and that opens in the vehicle width direction as a whole.

  The upper surface portion 13 b of the tire stopper 13 is bent upward near the portion corresponding to the leading arm mounting bracket 19, and the leading end on the inner side in the vehicle width direction is placed on the upper surface of the side member 1 and the leading arm mounting bracket 19 It is bonded and fixed via the upper surface portion 19b. The front end of the lower surface portion 13 c of the tire stopper 13 on the inner side in the vehicle width direction is also joined and fixed to the lower surface of the side member 1 via the lower surface portion 19 c of the leading arm mounting bracket 19.

  Therefore, the leading arm mounting bracket 19 is joined and fixed to the side member 1 so as to sandwich the side member 1 from above and below on the U-shaped opening side, and further the tire stopper 13 is covered so as to cover the leading arm mounting bracket 19. The side member 1 is joined and fixed to the side member 1 so as to be sandwiched from above and below at the U-shaped opening side. At that time, an inner sectional closed space 23 is formed between the leading arm mounting bracket 19 and the side member 1, and an outer sectional closed space 25 is formed between the leading arm mounting bracket 19 and the tire stopper 13.

  An upper surface of the leading arm mounting bracket 19 and the tire stopper 13 on the front side of the vehicle body is formed with an inclined surface 27 that is inclined so that the outer side in the vehicle width direction is the front position of the vehicle body than the inner side in the vehicle width direction. A reinforcing member 29 is joined and fixed to the leading arm mounting bracket 19 and the front end of the tire stopper 13 so as to be aligned with the inclined surface 27. The reinforcing member 29 protrudes above the vehicle body from the tire stopper 13. The end of the reinforcing member 29 on the front side of the vehicle body forms substantially the same surface as the end of the lower side of the tire stopper 13 on the front side of the vehicle body. The end plate 31 is joined and fixed. The end plate 31 is configured by a surface substantially perpendicular to the longitudinal direction of the vehicle body, and the front wheel tire 15 is positioned in front of the end plate 31 in the vehicle body.

  2 and 4, the front side of the vehicle body of the tire stopper 13 protrudes from the leading arm mounting bracket 19 to the front side of the vehicle body. It is extended. A vehicle body front side protruding portion 19f on the lower side of the outer side surface portion 19a of the leading arm mounting bracket 19 protrudes forward so as to overlap the inner side surface of the inner plate 32 in the vehicle width direction. A partition plate 33, 35 extending in the vehicle width direction is provided as a rib on the vehicle body front side of the outer cross-section closed space 25 on the vehicle body front side to form a front closed space 37 and a rear closed space 39. , Has increased rigidity.

  A front outer closed space 41 is formed outside the front closed space 37 in the vehicle width direction. The front outer closed space 41 is surrounded by the above-described end plate 31 on the front side of the vehicle body, the rear plate 43 on the rear side, the outer plate 45 covering the outer side and the lower side in the vehicle width direction, and the cabin mounting bracket 17 shown in FIG. It is. In the front outer closed space 41 having a substantially square shape in plan view, the reinforcing plate 47 is slanted so as to connect the vicinity of the front corner in the vehicle width direction outside and the vicinity of the corner in the rear in the vehicle width direction. It is housed and fixed to increase rigidity.

  The cabin mounting bracket 17 fixes and supports an intermediate portion of the cabin 10 in the longitudinal direction of the vehicle body. As shown in FIGS. 5 and 6, an inner edge 17 a extending in the longitudinal direction of the vehicle body on the inner side in the vehicle width direction, The member 1 is joined and fixed to the upper end corner of the outer side in the vehicle width direction. The inner edge 17a of the cabin mounting bracket 17 has an upper surface 17a1 and a side surface 17a2 that are substantially perpendicular to each other. The upper surface 17a1 is joined and fixed to the upper surface of the side member 1, and the side surface 17a2 is joined and fixed to the outer surface of the side member 1. ing.

  The main body portion 17b outside the inner edge portion 17a of the cabin mounting bracket 17 has a flat plate shape substantially parallel to the horizontal plane. The rear edge portion 17c on the vehicle body rear side of the main body portion 17b has a curved shape that is inclined such that the outer side in the vehicle width direction is forward of the vehicle body than the inner side in the vehicle width direction and is slightly concave on the inner side. The outer edge 17d on the front side of the vehicle body from the rear edge 17c extends in the longitudinal direction of the vehicle substantially parallel to the inner edge 17a, and the front end thereof is connected to the end plate 31 together with a part of the main body 17b outside in the vehicle width direction. Bonded and fixed. An attachment hole 17e for attaching the cabin 10 is provided at approximately the center of the main body portion 17b in the longitudinal direction of the vehicle body.

  The leading arm mounting bracket 19 constitutes an arm mounting member for mounting an end portion on the vehicle body rear side of a leading arm 49 (FIG. 7) extending in the vehicle longitudinal direction as a suspension arm. The leading arm mounting bracket 19 includes a rectangular plate-shaped mounting portion 19d that is bent upward at an end portion on the front side of the vehicle body, and a boss having a circular mounting hole located at the center of the mounting portion 19d. A portion 19e is provided. The attachment portion 19d is attached so as to close the vehicle body front side of the inner cross-section closed space 23 in the leading arm attachment bracket 19.

  As shown in FIG. 7, the rear end of the leading arm 49 is inserted into the mounting hole of the boss portion 19e of the leading arm mounting bracket 19 through the space between the side member 1 and the inner plate 32, and the front and rear of the insertion portion. A nut 55 is fastened with a bush 53 or the like interposed therebetween. When the nut 55 is fastened, a tool (not shown) is used from the outside in the vehicle width direction of the tire stopper 13.

  At that time, as shown in FIG. 3, a rectangular opening 13a1 and an opening 19a1 serving as work holes are formed in the outer surface 13a of the tire stopper 13 and the outer surface 19a of the leading arm mounting bracket 19, respectively. . The openings 13a1 and 19a1 are positioned so as to be aligned with each other along the vehicle width direction, and the nut fastening portion at the rear end of the leading arm 49 faces (views) from the outside in the vehicle width direction. For this reason, a tool can be inserted from the openings 13a1 and 19a1 and the nut 55 shown in FIG. 7 can be fastened.

  Further, the cabin mounting bracket 17 that is bonded and fixed to the outer side portion of the tire stopper 13 extends the rear side of the vehicle body to a position corresponding to the end portion of the opening portions 13a1 and 19a1 on the rear side of the vehicle body. That is, the vehicle body rear side including the rear edge portion 17c of the cabin mounting bracket 17 is joined and fixed to the tire stopper 13 so as to cover the upper portion of the opening portion 13a1 over the entire length of the opening portions 13a1 and 19a1 in the longitudinal direction of the vehicle body.

  FIG. 8 is a simplified side view of a vehicle with a frame having the above-described vehicle body front structure. A bonnet 57 that covers a region B serving as an engine room is provided in front of the cabin 10 and the rear side of the cabin 10. In addition, a cargo bed 59 is provided. A rear wheel tire 61 is located below the loading platform 59. A floor panel 63 is provided at the bottom of the cabin 10, and a seat 65 is disposed on the floor panel 63.

  The cabin 10 and the fender portion 67 that supports the hood 57 are integrated, and the cabin 10 including the fender portion 67 is connected to the cabin mounting brackets 11 and 17 and the cabin mounting bracket 69 on the front side of the vehicle body. It is connected to the side member 1. Of these, the cabin mounting bracket 17 located at the center in the vehicle longitudinal direction is joined and fixed to the tire stopper 13 as shown in FIG. The cabin 10 is fixed on the three cabin mounting brackets 11, 17, 69 via bushes 71, 73, 75.

  The cabin 10 described above includes a front pillar 77 on the front side of the vehicle body and a rear pillar 79 on the rear side of the vehicle body. The front pillar 77 has a lower end 77 a connected to the side member 1 via the cabin mounting bracket 17 and the tire stopper 13. The rear pillar 79 has a lower end 79 a connected to the side member 1 via the cabin mounting bracket 11. Accordingly, the front pillar 77 constitutes a first pillar whose lower end portion is connected to the side member 1 and extends in the vertical direction, and the rear pillar 79 is located rearward of the vehicle body with respect to the front pillar 77, and the side member 1. The second pillar is configured such that the lower end portion is connected to the upper and lower sides and extends in the up-down direction.

  Next, an impact load transmission path when a vehicle having the vehicle body front structure as described above collides with an obstacle such as another automobile from the front will be described. For example, when the front wheel tire 15 on the left side in the vehicle width direction (lower side in FIG. 1) moves in the direction indicated by the arrow C at the rear of the vehicle body due to the collision, the front wheel tire 15 interferes with the tire stopper 13. In the following description, the case where the left side of the vehicle body collides will be described. However, the same effect described below can also be obtained when the right side of the vehicle body collides.

  At this time, the tire stopper 13 transmits the collision load to the rear side when the end plate 31 receives contact with the front wheel tire 15. The collision load F1 received by the tire stopper 13 is transmitted to the side member 1, and is transmitted to the central cross member 3 together with the collision load F2 received by the side member 1 from an obstacle. At this time, the load received by the side member 1 is transmitted as a collision load F3 to the central cross member 3 through the front cross member 7 and its connecting member 9. The collision load F3 transmitted to the central cross member 3 is transmitted to the vehicle width direction right side which is the non-collision side opposite to the collision side.

  At this time, in this embodiment, the lower end portion 77a of the front pillar 77 shown in FIG. 8 is fixed to the cabin mounting bracket 17 provided on the tire stopper 13. For this reason, the collision load received by the tire stopper 13 is also transmitted from the cabin mounting bracket 17 to the front pillar 77 to absorb the shock.

  Therefore, in this embodiment, when the vehicle receives a collision load in the vicinity of the side member 1 on one side in the vehicle width direction, the load is transmitted to the non-collision side opposite to the collision side, and is also transmitted to the front pillar 77. The collision load is distributed and received throughout the vehicle body. As a result, load transmission to the rear of the vehicle body is sufficient. By receiving the collision load in the entire vehicle body, it is possible to suppress the deformation of the cabin 10 while suppressing the breakage of the side member 1.

  In the present embodiment, the tire stopper 13 is provided with a load transmission member that transmits the load received from the front wheel tire 15 to the non-collision side of the vehicle body in the vehicle width direction. This load transmission member corresponds to the partition plates 33 and 35 that form the front closed space 37 and the rear closed space 39 shown in FIG. 4, the reinforcing plate 47 that forms the front outer closed space 41, and the like. In addition to this, the load transmitting member is not provided on the tire stopper 13 but also includes a leading arm mounting bracket 19.

  In this case, when the front tire 15 collides with the tire stopper 13 in the direction of the arrow D in a state where the front tire 15 is tilted as shown by the broken line in FIG. 1, the collision load F11 is applied to the side member 1 and the front through the load transmission member. It is transmitted to the central cross member 3 through the connecting member 9 of the partial cross member 7. Thereby, the collision load received in the vicinity of the side member 1 on one side in the vehicle width direction can be efficiently transmitted to the non-collision side opposite to the vehicle width direction.

  In this embodiment, the tire stopper 13 is provided with a leading arm mounting bracket 19 for attaching the rear end of the leading arm 49 that supports the front wheel to the vehicle body. In this case, by integrating the leading arm mounting bracket 19 so as to be included in the tire stopper 13, the rigidity of the tire stopper 13 is increased and load transmission can be efficiently performed.

  In the present embodiment, the tire stopper 13 is provided with a cabin mounting bracket 17 for mounting the cabin 10 constituting the outer shell of the passenger compartment to the side member 1. In this case, by integrating the cabin mounting bracket 17 by joining and fixing to the tire stopper 13, the rigidity of the tire stopper 13 is increased and load transmission can be performed efficiently.

  Further, in this embodiment, an opening 13a1 serving as a work hole for attaching the rear end of the leading arm 49 that supports the front wheel to the leading arm mounting bracket 19 is provided in the tire stopper 13, and the opening 13a1 is provided. A cabin mounting bracket 17 is provided on the tire stopper 13 at the position.

  In this case, the rigidity of the tire stopper 13 is reduced by providing the opening 13a1, but the rigidity reduction can be suppressed by bonding and fixing the cabin mounting bracket 17 to a portion where the rigidity is reduced.

  As a modification of the above-described embodiment, the tire stopper 13 can be configured to be coupled to the cabin mounting bracket 11 serving as a rear mounting member. In this case, as shown by a two-dot chain line in FIG. 1, a bulging portion 13 d that bulges outward in the vehicle width direction is integrally formed on the rear portion of the vehicle body of the tire stopper 13. The bulging portion 13 d is formed so as to cover the lower portion of the cabin mounting bracket 11 and is connected to the lower portion of the cabin mounting bracket 11 and the side member 1. Thereby, the collision load received by the tire stopper 13 can be efficiently transmitted to the side member 1. In this case, the collision load received by the tire stopper 13 is also transmitted to the rear pillar 79 via the cabin mounting bracket 11, so that the effect of distributing the load to the entire vehicle body is further enhanced.

  As mentioned above, although embodiment of this invention was described, these embodiment is only the illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom. For example, in the above-described embodiment, the frontal collision of the vehicle has been described, but the present invention can be applied even in the case of a side collision.

  That is, in the case of a side collision, the collision load received from the side by the tire stopper 13 is transmitted from the side member 1 to the non-collision side member 1 through the central cross member 3 while suppressing damage to the side member 1. be able to. At that time, the collision load is also transmitted to the front pillar 77 via the cabin mounting bracket 17.

1 Side member 10 Cabin (Vehicle compartment component)
11 Cabin mounting bracket (rear mounting member for mounting passenger compartment components)
13 Tire stopper (load receiving member)
15 Front wheel tire (front wheel)
17 Cabin mounting bracket (mounting member for mounting compartment components)
13a1 Tire stopper opening (work hole)
19 Leading arm mounting bracket (arm mounting member)
33, 35 Partition plate (load transmission member)
47 Reinforcement plate (load transmission member)
49 Leading arm (suspension arm)
77 Front pillar (first pillar)
79 Rear pillar (second pillar)

Claims (6)

A side member extending in the vehicle longitudinal direction on the outer side in the vehicle width direction;
A first pillar having a lower end connected to the side member and extending in a vertical direction;
A second pillar that is located rearward of the first pillar and has a lower end connected to the side member and extending vertically.
It is connected to the outer side of the side member in the vehicle width direction and is connected to the lower end of at least one of the first pillar and the second pillar, so that the front wheel moves backward and interferes in the event of a frontal collision of the vehicle. A vehicle body front structure comprising a load receiving member that   The vehicle body front part structure according to claim 1, wherein a load transmitting member that transmits a load received from the front wheel to a non-collision side in a vehicle width direction of the vehicle body is provided on the load receiving member.   The vehicle body front structure according to claim 1 or 2, wherein an arm attachment member for attaching a rear end of a suspension arm that supports the front wheel to the vehicle body is provided on the load receiving member.   The attachment member for attaching the compartment component which comprises the outer shell of a compartment to the said side member is provided in the said load receiving member, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Car body front structure.   An arm attachment member for attaching the rear end of the suspension arm that supports the front wheel to the vehicle body is provided in the load receiving member, and a work hole for attaching the rear end of the suspension arm to the arm attachment member is provided in the load receiving member. The vehicle body front part structure according to claim 4, wherein the mounting member is provided on the load receiving member provided at a position where the work hole is provided.   The lower end portion of the second pillar is connected to the side member in the vicinity of a rear mounting member for mounting a casing constituent member constituting the outer shell of the casing to the side member, and the load receiving member is connected to the rear mounting member. The vehicle body front part structure according to any one of claims 1 to 5, wherein the vehicle body front part structure is provided.

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