JP5711006B2 - Front body structure of automobile - Google Patents

Description

  The present invention relates to a front body structure of an automobile designed to absorb an impact load from the front of the vehicle.

  In an automobile, a structure that suppresses the influence on a collision object by absorbing an impact load at the time of a light collision is adopted. For example, Patent Document 1 discloses a structure in which the hood lock (32) is rotated downward about the first attachment portion (42A) by an impact load from the front upper side. Further, Patent Document 2 discloses an energy absorbing member (25) in which a hood lock support (12) is bent with a notch (20) as a starting point and a radiator core support (23) is attached by an impact load from the front upper side. ) Is compressed and deformed, whereby the hood lock (14) is moved rearward and downward. Furthermore, in Patent Document 3, a fragile portion (18g) and a slit (19e) are provided in brackets (18, 19) that support the hood lock (17), and the hood lock (17) is moved rearward by an impact load from the front. A structure adapted to be disclosed is disclosed.

JP 2002-19641 A Utility Model Registration No. 2510532 JP 2006-44336 A

  By the way, for example, in a compact car with a so-called low hood design in which the hood is located in a low place, it is common to attach a hood lock to the front wall surface of the radiator support. In this type of vehicle, when an impact load is applied from the front of the vehicle, the hood lock bottoms on the radiator support and cannot move rearward, so that an energy absorption effect cannot be expected.

  Even if it is going to adopt the conventional structure of patent document 1 as it is to such a low hood design vehicle, it is difficult to adopt it because the hood lock rotates downward. Further, the structure of Patent Document 2 needs to secure an energy absorption space between the radiator support and the hood lock, and is difficult to adopt for a small vehicle. Furthermore, since Patent Document 3 has a structure in which the hood lock is disposed on the upper surface of the radiator support, it is also difficult to adopt this.

  The present invention has been made in view of the above-described conventional situation, and when the hood lock is disposed on the front wall surface of the radiator support upper member, an energy absorption space can be secured and the effect of absorbing a collision load can be improved. An object is to provide a front body structure of an automobile.

  The present invention relates to a radiator support upper member extending in the vehicle width direction, a vehicle body constituting member positioned below the radiator support upper member, a hood lock attached to a front wall surface of the radiator support upper member, and the hood lock. A front vehicle body structure of an automobile provided with a hood lock support member that couples to the vehicle body component member, wherein the hood lock moves backward on the radiator support upper member due to an impact load from the front of the vehicle. A permissible upper member deformation allowing portion is provided, and the hood lock supporting member or the vehicle body constituting member is provided with a supporting member deformation allowing portion that allows the hood lock supporting member to tilt backward due to the impact load. The impact load is attached to the attachment portion of the hood lock to the radiator support upper member. The hood lock disengagement portion for disengaging the lower rear the hood lock with the rear slope of the hood lock of backward movement and the hood lock support member is characterized by being provided with.

  Here, the vehicle body constituting member includes an ODB member that absorbs energy at the time of a vehicle collision, a bumper inhose that supports a front bumper, or a lower member of a radiator support. Any body member that can receive a load at the time of closing may be used.

  According to the front vehicle body structure of the present invention, the radiator support upper member is provided with the upper member deformation allowing portion that allows the rear movement of the hood lock with respect to the impact load from the front of the vehicle, and the hood lock support member or the vehicle body configuration The member is provided with a support member deformation allowance part that tilts the hood lock support member backward with respect to the impact load, and further, the hood lock with respect to the impact load is lowered rearward and downward at the attachment part of the radiator support upper member A configuration is provided in which a hood lock detachment portion is provided for detachment.

  With this configuration, when an impact load is applied from the front of the vehicle, the hood lock falls off the radiator support upper member and then moves downward, and the hood lock is placed on the front wall surface of the radiator support upper member. An energy absorption space can be secured, and collision energy can be absorbed effectively. That is, when the hood lock moves rearward and downward, an energy absorption space is formed on the front side of the radiator support upper member, whereby further deformation of the hood can be promoted, and the energy absorption effect can be improved.

  Further, the hood lock moves rearward and downward while being connected to the hood lock support member, so that the hood lock is not released and the hood is not opened. Thereby, the dropping locus | trajectory of a hood lock is controlled and the more stable energy absorption effect is acquired.

  As described above, in the present invention, the hood lock is dropped from the front wall surface of the radiator support upper member to the rear lower side. Therefore, even when the hood lock is adopted in a vehicle having a low energy hood, for example, a low hood design. Without providing the energy absorbing structure, the energy absorbing effect against the impact load from the front can be enhanced.

1 is a perspective view of a front body of an automobile according to Embodiment 1 of the present invention. It is sectional drawing of the said front part vehicle body. It is a front view of the hood lock of the front body. It is a front view of the said hood lock attaching part. It is a perspective view of the front body. It is a perspective view of the front vehicle body by Example 2 of the present invention. It is a perspective view of the front vehicle body by Example 3 of the present invention. It is a perspective view of the front vehicle body by Example 4 of the present invention.

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

  FIGS. 1 to 5 are views for explaining a front body structure of an automobile according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a front body of an automobile. The front vehicle body 1 includes left and right side members 2 and 2 extending in the longitudinal direction of the vehicle, a radiator support 3 disposed between front end portions of the left and right side members 2, and the left and right side members. An ODB member (vehicle body constituting member) 4 disposed on the front end surface of the member 2 and extending in the vehicle width direction is disposed so as to cover the upper part of the engine room formed by the left and right side members 2 and the radiator support 3. And a hood 5 provided.

  The front vehicle body 1 is disposed on the front surface of the radiator support 3 and is disposed so as to connect the hood lock 6 that locks the hood 5 to the fully closed position, and the hood lock 6 and the ODB member 4. The hood lock support member 7 is provided.

  A resin front bumper 10 is disposed on the front side of the ODB member 4 of the front body 1. The front bumper 10 has a size that substantially covers the radiator support 3 when viewed from the front of the vehicle.

  The hood 5 is disposed so as to be close to the radiator support 3, and the front edge portion 5b is curved downward so as to be close to the upper edge portion 10a of the front bumper 10 (see FIG. 2). Thereby, it is a low hood design in which the hood 5 is arranged in a low place.

  The rear end of the hood 5 is supported on the front vehicle body 1 via a hinge member (not shown) so that it can be opened and closed up and down. Further, a striker 5 a that is detachably engaged with the hood lock 6 is attached to a central portion of the front end portion of the hood 5 in the vehicle width direction.

  The radiator support 3 is made of sheet metal, and extends in the vehicle width direction, which is coupled between the left and right side members 14 and 14 extending in the vertical direction and the upper ends of the left and right side members 14. A structure in which an upper member 15 and a radiator support lower member 16 extending in the vehicle width direction coupled between the lower ends of the left and right side members 14 via brackets 17 and 17 are integrally assembled so as to form a rectangular shape. Have.

  The radiator support 3 is supported on the side member 2 by connecting the vertical center portions of the left and right side members 14 to the inner walls of the left and right side members 2.

  The radiator support upper member 15 includes a substantially flat plate-like upper wall portion 15a, a front wall portion 15b extending downward from the front edge of the upper wall portion 15a, and a rear edge of the upper wall portion 15a. And a rear wall portion 15c that is bent downward and extends downward from the cross section.

  The front wall portion 15b is formed such that its vertical dimension is larger than that of the rear wall portion 15c, and is opened downward. A hood lock mounting recess 15e is formed at the center of the front wall portion 15b in the vehicle width direction so as to be recessed rearward.

  The mounting recess 15e is formed with a pair of left and right bolt holes 15f and 15f. A rear bolt hole 15g is formed in a portion of the rear wall portion 15c located between the left and right bolt holes 15f.

  The hood lock 6 is disposed in the mounting recess 15e of the front wall portion 15b of the radiator support upper member 15, and is located on the front surface of the front wall portion 15b.

  The hood lock 6 includes a lock mechanism 19 that engages with the striker 5a of the hood 5 to lock the hood 5 in the fully closed position, and a lock plate 20 to which the lock mechanism 19 is attached.

  The lock plate 20 is made of a sheet metal, and has a U-shaped plate body 20a in plan view, and left and right mounting flange portions 20b and 20b bent outwardly from the plate body 20a. And a mounting projection 20d bulging forward at the bottom of the plate body 20a.

  The lock plate 20 is inserted into the bolt hole 15f of the front wall portion 15b through the left and right mounting flange portions 20b from the front and the bolts 22 are tightened. It is fixed to 15b.

  The ODB member 4 is attached to the front end surfaces of the left and right side members 2. The ODB member 4 is for absorbing an impact load at the time of a light vehicle collision. The ODB member 4 faces the lower part of the front bumper 10 and protrudes forward by the radiator support 3 and the left and right side members 2. The bulge is formed.

  A flange portion 4a having a mountain shape is integrally formed at the center of the upper edge of the ODB member 4 in the vehicle width direction.

  The hood lock support member 7 has a belt-like support plate portion 7a extending in the vertical direction, and is bent to the rear side following the support plate portion 7a, and faces the rear wall portion 15d of the radiator support upper member 15. And a side plate portion 7b extending.

  The lower end portion 7d of the support plate portion 7a of the hood lock support member 7 is fastened and fixed to the rear surface of the flange portion 4a of the ODB member 4 by a bolt 23, and the upper end portion 7e is fixed to the hood lock 6 by a bolt 24. It is fastened and fixed to the rear surface of the portion 20c.

  Further, the upper end portion 7c of the side plate portion 7b is fixed to the rear wall portion 15c by being fastened to the rear bolt hole 15g of the rear wall portion 15c by a bolt 25. As a result, the load when the hood is closed acting on the hood lock 6 is supported by the ODB member 4 via the hood lock support member 7.

  The radiator support upper member 15 is provided with an upper member deformation allowing portion that allows the hood lock 6 to move backward with respect to an impact load from the front of the vehicle.

  The upper member deformation allowing portion is formed by the front wall portion 15 b of the radiator support upper member 15. The front wall portion 15b is longer in the vertical dimension than the rear wall portion 15c and is opened downward, so that the front wall portion 15b is easily deformed rearward by an input from the front of the vehicle.

  The ODB member 4 is provided with a support member deformation allowing portion for tilting the hood lock support member 7 backward with respect to the impact load.

  The support member deformation allowing portion is formed by a flange portion 4 a that is formed to protrude from the upper edge of the ODB member 4. The flange portion 4a is easily bent and deformed backward from the input from the front of the vehicle. For this reason, the hood lock support member 7 tilts backward from the flange portion 4a.

  The hood lock mounting recess 15e of the radiator support upper member 15 is provided with a hood lock detaching portion for detaching the hood lock 6 downward with respect to the impact load.

  The hood lock disengagement part is formed by slits 15h and 15h that are notched so as to open downward following the left and right bolt holes 15f of the front wall part 15b.

  When an impact load is applied from the front due to a light vehicle collision, the hood lock 6 deforms the front wall portion 15b and moves backward, and the hood lock support member 7 bends and deforms the flange portion 4a to tilt backward. Thus, the hood lock support member 7 pulls the hood lock 6 downward. As a result, the bolts 22 of the hood lock 6 fall out downward from the bolt holes 15f of the front wall portion 15b through the slits 15h, and the hood lock 6 falls off the radiator support upper member 15 so that the rearward lower portion of the upper member 15 Move (see the two-dot chain line in FIG. 2). At this time, the hood lock 6 is dropped rearward and downward in a state of being coupled to the hood lock support member 7, so that the hood 5 is pulled rearward and downward as the hood lock 6 moves rearward and downward.

  According to the present embodiment, the radiator support upper member 15 is provided with the front wall portion 15b opened downward that functions as an upper member deformation allowing portion that allows the hood lock 6 to move rearward against an impact load from the front of the vehicle. And a flange portion 4a that can be bent and deformed to function as a support member deformation allowing portion for tilting the hood lock support member 7 rearward with respect to the impact load. The bolt hole 15f of the radiator support upper member 15 is also provided. In addition, a slit 15h functioning as a hood lock detachment portion for detaching the hood lock 6 with respect to the impact load is provided.

  Since it comprised in this way, the hood lock 6 will drop | omit from the radiator support upper member 15 by the impact load from the front of a vehicle, and will move below after that, The hood lock 6 is moved to the front wall part 15b of the radiator support upper member 15. When it is arranged on the front surface, an energy absorption space can be secured, and collision energy can be effectively absorbed. That is, when the hood lock 6 moves rearward and downward, an energy absorption space is formed on the front side of the radiator support upper member 15, thereby further promoting the deformation of the hood 5 and improving the energy absorption effect. Can be made.

  Further, since the hood lock 6 is pulled down rearward while being pulled by the hood lock support member 7, the lock with the hood 5 is not released and the hood 5 is not opened. Thereby, the dropping locus | trajectory of the food lock 6 will be controlled, and the more stable energy absorption effect will be acquired.

  As described above, in this embodiment, the hood lock 6 is removed from the front wall portion 15b of the radiator support upper member 15 rearward and downward, so that the hood lock 6 can be used in a low hood design automobile with limited energy absorption space. It becomes possible and the energy absorption effect with respect to the impact load from the front can be enhanced without providing a special energy absorption structure.

  In this embodiment, the front wall portion 15b of the radiator support upper member 15 can be deformed, the flange portion 4a of the ODB member 4 can be bent and deformed, and a slit 15h is formed in each bolt hole 15f of the front wall portion 15b. The above-described energy absorption effect can be obtained with only a simple structure, and can be realized at a low cost with almost no change in the vehicle body structure.

  In the above-described embodiment, the flange portion 4a is bent and deformed as the support member deformation allowance portion. However, the support member deformation allowance portion of the present invention is bent and deformed, for example, at the lower end portion of the hood lock support member. Alternatively, a groove may be formed in the hood lock support member, and the groove may be bent and deformed from the groove.

  Moreover, in the said Example, although comprised by forming the slit 15h in the bolt hole 15f as a hood lock drop-off part, the hood lock drop-off part of the present invention has, for example, a weak part having lower rigidity than other parts on the front wall part. You may comprise by forming or forming a thin diameter part in a volt | bolt.

  Further, in the present invention, a slit may be formed in the rear bolt hole 15g of the rear wall portion 15c of the radiator support upper member 15 so that the hood lock support member 7 is dropped together with the hood lock 6 being dropped.

  6, 7 and 8 are diagrams for explaining Examples 2, 3 and 4 of the present invention, respectively. In these drawings, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.

  FIG. 6 shows a front vehicle body according to a second embodiment of the present invention. In the second embodiment, a bumper-in hose 30 is disposed below the radiator support upper member 15 as a vehicle body constituting member. The flange 30a is formed to protrude from the bumper inn hose 30, and the hood lock support member 7 is bolted and fixed to the flange 30a, whereby the flange 30a is bent and deformed.

  FIG. 7 shows a front vehicle body according to a third embodiment of the present invention. In the third embodiment, a radiator support lower frame 31 is disposed below the radiator support upper member 15. A flange 31a is formed to protrude from the radiator support lower frame 31, and the flange 31a is bent and deformed.

  FIG. 8 shows a front vehicle body according to a fourth embodiment of the present invention. In the fourth embodiment, a plate-shaped radiator support member 32 having a surface shape is disposed below the radiator support upper member 15. is there. The lower end portion 7d of the hood lock support member 7 is bolted and fixed to the upper edge portion 32a of the radiator support member 32, and the hood lock support member 7 is bent and deformed backward from the lower end portion 7d. is there.

  Furthermore, although not shown, the present invention is also applicable to a resin radiator support having a rectangular frame-shaped frame portion and an inner wall integrally formed so as to close the inside of the frame portion. .

1 Front car body 4 ODB member (car body component)
4a Flange (support member deformation allowance)
6 Hood lock 7 Hood lock support member 7d Lower end (support member deformation allowable portion)
15 Radiator support upper member 15b Front wall portion (upper member deformation allowable portion)
15h Slit (hood lock release part)
30 bumper-in hose (body component)
30a Flange part (support member deformation allowable part)
31 Radiator support lower frame (body components)
31a Flange part (support member deformation allowable part)
32 Radiator support member (body component)

Claims (1)

A radiator support upper member extending in the vehicle width direction;
A vehicle body constituting member located below the radiator support upper member;
A hood lock attached to the front wall surface of the radiator support upper member;
A front vehicle body structure of an automobile provided with a hood lock support member that connects the hood lock and the vehicle body component,
The radiator support upper member is provided with an upper member deformation allowing portion that allows the hood lock to move backward due to an impact load from the front of the vehicle,
The hood lock support member or the vehicle body component member is provided with a support member deformation allowing portion that allows the hood lock support member to tilt backward due to the impact load.
The hood lock is attached to the radiator support upper member. A vehicle body structure for a front part of an automobile, characterized in that a part is provided.

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