JP5195516B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure.

  2. Description of the Related Art Conventionally, as a vehicle body structure, a vehicle body structure including a side member that extends in the front-rear direction of the vehicle and a bumper that is horizontally mounted on an end portion of the side member via a crash box (see, for example, Patent Document 1) ). In this vehicle body structure, a cross member that extends horizontally along the vehicle width direction and is coupled to the side member via a brace is provided above the side member, and the cross member is fixed to the suspension tower. The load received by the cross member is transmitted to the suspension tower together with the side member, and the collision load is transmitted to the rear side of the vehicle.

JP 2006-117224 A

  However, the conventional vehicle body structure has a problem in that the structure is complicated because the cross member needs to be coupled to the side member via the brace and fixed to the suspension tower. In addition, since the vehicle body structure is configured to receive the load mainly in the suspension tower, there is a problem that the load cannot be effectively distributed and transmitted.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a vehicle body structure capable of effectively distributing and transmitting a load with a simple configuration.

  The vehicle body structure according to the present invention is supported by a suspension member provided between a side member extending in the front-rear direction of the vehicle, a bumper horizontally mounted on an end portion of the side member via a crash box, and the side member and the wheel. Vehicle body structure equipped with a shock absorber provided with a transmission member arranged so as to be non-contact with the shock absorber and capable of contacting the shock absorber by a load inputted via a bumper. The member is connected to the crash box in parallel with the side member.

  According to such a vehicle body structure, the transmission member is connected to the crash box in parallel with the side member so that the transmission member is not in contact with the shock absorber, and when a collision load is applied to the bumper, Simultaneously with the deformation of the member, the transmission member comes into contact with the shock absorber. As a result, a load is transmitted through the load path by the side member, a load path from the transmission member to the shock absorber is formed, and the load is transmitted to the rocker via the suspension member that supports the shock absorber. Furthermore, due to the deformation of the suspension member, the wheel (tire) and the rocker come into early contact with each other to form another load path. Therefore, a plurality of load paths can be formed at an early stage, and the load can be effectively distributed and transmitted. In addition, since the transmission member is not in contact with the shock absorber, a configuration for fixing to the shock absorber is not required, and therefore, the load can be distributed and transmitted effectively with a simple configuration. it can.

  Here, it is preferable that the transmission member is connected to the crash box so that at least a part thereof is positioned at the same height as the vertical position of the side member. When such a configuration is adopted, there is no significant deviation in the vertical height between the side member and the transmission member. Therefore, when the transmission member transmits a load to the shock absorber, the vertical moment generated in the side member is reduced. Can be reduced. Therefore, the load can be more effectively distributed and transmitted. The horizontal moment is reduced by a bumper extending in the width direction.

  The vehicle body structure according to the present invention includes a side member that extends in the front-rear direction of the vehicle, a bumper that is horizontally mounted on the end of the side member via a crash box, and a suspension member that is provided between the side member and the wheel. A vehicle body structure including a shock absorber to be supported includes a transmission member that is disposed so as to be non-contact with the shock absorber and that can be brought into contact with the shock absorber by a load input via a bumper. The transmission member is characterized in that a portion that can be brought into contact with the shock absorber has a shape corresponding to the shape of the shock absorber.

  According to such a vehicle body structure, the transmission member is disposed so as not to contact the shock absorber, and when a collision load is applied to the bumper, the transmission member contacts the shock absorber. As a result, a load path from the transmission member to the shock absorber is formed, the load is transmitted to the rocker via the suspension member that supports the shock absorber, and the load is transmitted by the load path by the side member connected to the bumper. Is done. Further, due to the deformation of the suspension member, the wheel and the rocker come into contact with each other to form another load path. Therefore, a plurality of load paths can be formed, and the load can be effectively distributed and transmitted. In addition, since the transmission member is not in contact with the shock absorber, a configuration for fixing to the shock absorber is not required, and therefore, the load can be distributed and transmitted effectively with a simple configuration. it can. Furthermore, since the portion of the transmission member that can be brought into contact with the shock absorber has a shape corresponding to the shape of the shock absorber, the load transmission from the transmission member to the shock absorber is improved, and more effectively. The load can be distributed and transmitted.

  According to the present invention, a load can be distributed and transmitted effectively with a simple configuration.

1 is a perspective view showing a vehicle body structure according to an embodiment of the present invention. It is a side view of the vehicle body structure shown in FIG. It is a figure which shows the vehicle body structure shown in FIG. 1 from the front side. It is a side view for demonstrating transmission of a load. FIG. 5 is a diagram showing FIG. 4 from above. It is a figure which shows the transmission member which concerns on 2nd embodiment of this invention. It is a figure which shows the transmission member which concerns on 3rd embodiment of this invention.

  Hereinafter, an embodiment of a vehicle body structure according to the present invention will be described with reference to the drawings. 1 is a perspective view showing a vehicle body structure according to an embodiment of the present invention, FIG. 2 is a side view of the vehicle body structure shown in FIG. 1, and FIG. 3 is a view showing the vehicle body structure shown in FIG. is there. 1 to 3 show the structure of only one side of the vehicle in the vehicle width direction.

  As shown in FIG. 1, the vehicle body structure 1 according to the present embodiment includes a side member 2, a bumper reinforcement 3, a shock absorber 4, and a transmission member 5.

  The side members 2 are a pair of skeletal members that extend in the vehicle front-rear direction on both sides of the vehicle, and absorb the impact by applying a compressive load in the event of a collision. The side member 2 has a predetermined compressive strength. When a load larger than the compressive strength is applied in the axial direction, the side member 2 is compressively deformed (buckled) and absorbs the load (impact) by the compressive deformation.

  A crash box 6 extending in the vehicle front-rear direction is coupled between the front end portion of the side member 2 and the rear end portion of the bumper reinforcement 3. The crash box 6 is a rectangular tube that can be buckled and deformed in the axial direction, and is a member for absorbing a load at the time of collision. A flange 6a is formed at the rear end of the crash box 6, and a flange 2a is formed at the front end of the side member 2 facing the flange 6a. The flange 6a and the flange 2a are combined. In this state, the side member 2 and the crash box 6 are joined by bolt fastening.

  The bumper reinforcement 3 is a member that is fixed to the front end portion of the crash box 6 so as to reinforce a bumper (not shown) and is horizontally mounted in the vehicle width direction, and receives an impact at the time of a collision. When the bumper reinforcement 3 receives an impact at the time of collision, the bumper reinforcement 3 transmits a load generated in response to the impact to the crash box 6.

  The shock absorber 4 is one of the components constituting the suspension and absorbs the impact of the wheel 7 during traveling. The shock absorber 4 is disposed between the wheel 7 and the side member 2, and an upper end thereof is attached to a vehicle body (not shown) of an automobile, and a lower end thereof is attached to and supported by the suspension member 8. The suspension members 8 are arranged on both the left and right sides of the vehicle and are connected to rockers 9 extending in the front-rear direction of the vehicle.

  The transmission member 5 is a member that is connected to the flange 2 a of the side member 2 and is disposed so as not to contact the shock absorber 4. When a collision load is applied to the bumper reinforcement 3 Further, it is a member that is capable of contacting the shock absorber 4 and transmits a load. Specifically, the transmission member 5 includes a main body portion 5 a and an abutting portion 5 b provided at one end of the main body portion 5 a and capable of abutting against the shock absorber 4.

  The main body 5a has a substantially cylindrical shape, extends parallel to the side member 2 and toward the shock absorber 4 side, and protrudes toward the outside of the vehicle width of the flange 2a of the side member 2 with respect to the crash box 6 It is connected. And as shown in FIG. 3, the main-body part 5a is attached to the flange 2a so that the central axis of the side member 2 and the central axis of the main-body part 5a may be located in the same height. In addition, the bead for adjusting a load may be provided in the main-body part 5a.

  As shown in FIGS. 1 and 2, the contact portion 5 b has a shape corresponding to the shape of the shock absorber 4. Specifically, as shown in FIG. 1, the contact portion 5 b has a semicircular cross section in accordance with the outer shape (circular shape) of the shock absorber 4, and the vehicle of the shock absorber 4 as shown in FIG. 2. The shape is inclined according to the inclination in the front-rear direction. Thereby, when the contact part 5b contacts the shock absorber 4, the contact part 5b is prevented from being displaced from the shock absorber 4. The distance between the contact portion 5b and the shock absorber 4 is set so that the contact portion 5b is closest to the shock absorber 4 outside the movable range of the shock absorber 4.

  Next, operations and effects of the vehicle body structure 1 of the present embodiment including the transmission member 5 will be described with reference to FIGS. 1, 4, and 5. FIG. 4 is a side view for explaining load transmission, and FIG. 5 is a diagram showing FIG. 4 from above.

  When the bumper receives a collision, as shown in FIG. 4, the crash box 6 is first crushed by applying a load to the crash box 6 via the bumper reinforcement 3, and then the side member 2 starts to be compressed and deformed. At this time, as shown in FIG. 1, a first load path L1 through which a load is transmitted is formed. Simultaneously with the compression deformation of the side member 2, the transmission member 5 arranged in parallel with the side member 2 contacts (contacts) the shock absorber 4, and the load is applied to the suspension as shown in FIGS. A second load path L2 that is transmitted to the rocker 9 via the member 8 is formed.

  Further, when the load is transmitted to the suspension member 8, the suspension member 8 is deformed, and with the deformation of the suspension member 8, the wheel 7 moves to the rocker 9 side, and the tire 10 and the rocker 9 come into contact with each other. Thus, the third load path L3 is formed. As described above, the transmission member 5 contacts the shock absorber 4 simultaneously with the compressive deformation of the side member 2, and a plurality of load paths L1, L2, and L3 are formed at an early stage.

  As described above, in this embodiment, the transmission member 5 is connected to the crash box 6 in parallel with the side member 2 so that the transmission member 5 is not in contact with the shock absorber 4. When a collision load is applied to the force 3), the transmission member 5 comes into contact with the shock absorber 4 simultaneously with the deformation of the side member 2, whereby the load is transmitted through the load path L1 by the side member 2, A load path L <b> 2 from the transmission member 5 to the shock absorber 4 is formed, and the load is transmitted to the rocker 9 via the suspension member 8 that supports the shock absorber 4. Further, due to the deformation of the suspension member 8, the tire 10 and the rocker 9 come into early contact with each other to form another load path L <b> 3. Therefore, a plurality of load paths L1, L2, and L3 can be formed at an early stage, and the load can be effectively distributed and transmitted. Further, since the transmission member 5 is not in contact with the shock absorber 4, a configuration for fixing to the shock absorber 4 is not required. Therefore, the load is distributed with a simple configuration and effectively transmitted. can do.

  Further, since at least a part of the transmission member 5 is connected to the crash box 6 so as to be positioned at the same height as the vertical position of the side member 2, the vertical height between the side member 2 and the transmission member 5 is increased. A large deviation does not occur, and when the transmission member 5 transmits a load to the shock absorber 4, the vertical moment generated in the side member 2 can be reduced. Therefore, the load can be more effectively distributed and transmitted. The horizontal moment is reduced by the bumper reinforcement 3 extending in the width direction.

  Further, since the contact portion 5b of the transmission member 5 that can contact the shock absorber 4 has a shape corresponding to the shape of the shock absorber 4, the load transmission from the transmission member 5 to the shock absorber 4 is good. Thus, the load can be distributed and transmitted more effectively.

  Further, since the transmission member 5 is connected to the crash box 6 through the flange 2a so as to be parallel to the side member 2, the stroke of the crash box 6 is not hindered and the performance at the time of low-speed collision is affected. Never give. In addition, the influence on the deformation (folding) mode of the side member 2 is small.

  In addition, by forming the plurality of load paths L1, L2, and L3 at an early stage, it is possible to resist the collision load and accelerate the vehicle body forward and away from the harming vehicle.

  Furthermore, since the load paths L1, L2, and L3 are formed at an early stage and the load is effectively distributed and transmitted, the compression strength of the side member 2 can be set low. Thereby, there is also an effect that the side member 2 can be reduced in weight.

  The present invention has been specifically described above based on the embodiment. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, the shape of the contact portion 5b of the transmission member 5 is not limited. Although the shape is semicircular, it may be a shape corresponding to the shape of the shock absorber 4, and may be a U-shaped cross section (concave shape), for example.

  Moreover, in the said embodiment, although the main-body part 5a of the transmission member 5 was made into the substantially cylindrical member, what is necessary is just a member sufficient to transmit a predetermined load, The shape is not limited.

  Moreover, in the said embodiment, although it was set as the structure which attaches the end of the transmission member 5 to the flange 2a of the side member 2, the attachment method of the transmission member 5 is not limited to this. For example, as shown in the second embodiment in FIG. 6, a triangular coupling member 11 is provided on the side portion of the main body 5 a on the side member 2 side, and the coupling member 11 allows the transmission member 5 to be connected to the side member 2 and the flange. You may attach to 2a. Further, as shown in the third embodiment of FIG. 7, a plate-like coupling member 12 is provided on the side portion of the main body portion 5 a on the side member 2 side, and the transmission member 5 is connected to the side member 2 and the flange by the coupling member 12. You may attach to 2a.

  DESCRIPTION OF SYMBOLS 1 ... Car body structure, 2 ... Side member, 3 ... Bumper reinforcement (bumper), 4 ... Shock absorber, 5 (5a, 5b) ... Transmission member, 6 ... Crash box, 7 ... Wheel, 8 ... Suspension member.

Claims (4)

Supported by a side member extending in the front-rear direction of the vehicle, a bumper placed across the end of the side member via a crash box, and a suspension member provided between the side member and the wheel and connected to a rocker In a vehicle body structure equipped with a shock absorber to be
A transmission member arranged so as to be non-contact with the shock absorber, and capable of contacting the shock absorber by a load input via the bumper;
The transmission member is pre Symbol stretched and the shock absorber side by side members and parallel, characterized in that it is connected to the crush box through a portion projecting in the vehicle width outer side of the side member Body structure.   The vehicle body structure according to claim 1, wherein the transmission member is coupled to the crash box so that at least a part of the transmission member is positioned at the same height as a vertical position of the side member. 3. The vehicle body structure according to claim 1, wherein a portion of the transmission member that can be brought into contact with the shock absorber has a shape corresponding to a shape of the shock absorber. The distance between the transmission member and the shock absorber is set so that the transmission member is closest to the shock absorber outside the movable range of the shock absorber. The vehicle body structure according to any one of claims.

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