JP2019131011A - Bumper beam structure and vehicle - Google Patents

Abstract

To provide a bumper beam structure which can ease stress concentrating on a joint area between a bumper beam and a crash box when a vehicle is towed, and to provide the vehicle.SOLUTION: A bumper beam structure 6 provided at a front part 2 of a vehicle 1 includes: a bumper beam 7 extending in a vehicle width direction Y; a crash box 8 extending in an anteroposterior direction X of the vehicle 1; a first area R1 to which the bumper beam 7 and the crash box 8 are welded; a fixing part 9 which is provided at the crash box 8 and can fix a towing hook Fk with the towing hook Fk penetrating through a through hole 7a formed at the bumper beam 7; and a second area R2 which is provided closer to the center Lc side of the bumper beam 7 as seen in the vehicle width direction Y than the first area R1 and increases strength of the bumper beam 7.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bumper beam structure capable of fixing a tow hook and a vehicle.

  Conventionally, a bumper beam extending in the width direction of the vehicle, a crash box extending in the front-rear direction of the vehicle, a joining region where the bumper beam and the crash box are joined, and the crash box are formed on the bumper beam. 2. Description of the Related Art A vehicle is known that includes a fixing portion capable of fixing a tow hook in a state where the tow hook is passed through the through hole. For example, Patent Document 1 discloses a structure in which a hook stay is provided along the front-rear direction of a crash box (bumper stay), and a tow hook can be attached to the hook stay.

JP 2008-13157 A

  In the prior art including Patent Document 1, when the vehicle is towed, stress is concentrated on the joint region between the bumper beam and the crash box every time a load is applied to the tow hook. Damage could be caused by repeated concentration of stress in the joint area.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bumper beam structure and a vehicle that can relieve stress concentrated on the joint region between the bumper beam and the crash box when the vehicle is towed. And

  A first aspect of the present invention that solves the above problem is a bumper beam structure provided at a front portion of a vehicle, the bumper beam extending in the width direction of the vehicle, and extending in the front-rear direction of the vehicle. A crash box, a first region where the bumper beam and the crash box are welded, and the tow hook provided in the crash box and passing through the through hole formed in the bumper beam. A bumper comprising: a fixing portion that can be fixed; and a second region of the bumper beam that is provided closer to a center side in the width direction than the first region and increases the strength of the bumper beam. It is in the beam structure.

  In the first aspect, when the vehicle is towed, part of the stress concentrated in the first region (joining region) where the bumper beam and the crash box are welded can be dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed.

  A second aspect of the present invention is the bumper beam structure according to the first aspect, wherein the second region is a convex portion provided on the bumper beam. .

  In the second aspect, the second region can be easily provided, and a part of the stress concentrated on the first region can be dispersed in the vicinity of the second region. Therefore, it becomes easy to provide a bumper beam structure that can relieve stress concentrated on the first region.

  A third aspect of the present invention is the bumper beam structure according to the first aspect or the second aspect, wherein when the length in the width direction of the first region is the first length, In the bumper beam structure, the length of the region in the width direction is shorter than the first length.

  In the third aspect, the second region prevents the bumper beam intensity from being excessively increased. Therefore, the stress concentrated on the first region can be relieved, and the function of the main body of the bumper beam structure, which is deformed and absorbs energy when the vehicle collides, is easily secured.

  A fourth aspect of the present invention is the bumper beam structure according to any one of the first to third aspects, wherein the second region is in the front-rear direction with respect to the first region. The bumper beam structure is provided at a position that does not overlap with the bumper beam structure.

  In the fourth aspect, the second region prevents the bumper beam intensity from being excessively increased. Therefore, the stress concentrated on the first region can be relieved, and the function of the main body of the bumper beam structure, which is deformed and absorbs energy when the vehicle collides, is easily secured.

  A fifth aspect of the present invention is the bumper beam structure according to any one of the first to fourth aspects, wherein the length in the width direction of the first region is the first length. The second region is in a bumper beam structure, wherein the second region is provided within the first length from an end in the width direction of the first region.

  In the fifth aspect, a part of the stress concentrated on the first region can be more effectively dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed more effectively.

  A sixth aspect of the present invention is the bumper beam structure according to any one of the first to fifth aspects, wherein the second region is an edge of the bumper beam in the front-rear direction. The bumper beam structure is characterized in that the bumper beam structure is provided.

  In the sixth aspect, a part of the stress concentrated on the first region can be more effectively dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed more effectively.

  A seventh aspect of the present invention is the bumper beam structure according to the sixth aspect, wherein the second region includes the edge portion of the bumper beam on the side where the first region is provided. A bumper beam structure is provided.

  In the seventh aspect, a part of the stress concentrated on the first region can be more effectively dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed more effectively.

  An eighth aspect of the present invention is the bumper beam structure according to any one of the first to seventh aspects, wherein the bumper beam is configured by spot welding a plurality of members. The bumper beam structure is characterized in that the second region is provided so as to include the spot-welded region.

  In the eighth aspect, a part of the stress concentrated on the first region can be more effectively dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed more effectively.

  Another aspect (9th aspect) of the present invention that solves the above problems is a bumper beam extending in the vehicle width direction, a crash box extending in the front-rear direction of the vehicle, and the bumper beam and crash box. A first region where the tow hook is fixed in a state where the tow hook is passed through a through hole formed in the bumper beam, and the bumper beam. And a second region that is provided closer to the center in the width direction than the first region and increases the intensity of the bumper beam.

  In the ninth aspect, when the vehicle is towed, part of the stress concentrated in the first region (joining region) where the bumper beam and the crash box are welded can be dispersed in the vicinity of the second region. Therefore, the stress concentrated on the first region can be relaxed.

  According to the bumper beam structure and the vehicle of the present invention, it is possible to relieve the stress concentrated on the joint region between the bumper beam and the crash box when the vehicle is towed.

The figure which shows the structural example of the vehicle body front part of the vehicle which concerns on Embodiment 1. FIG. FIG. 3 is a diagram illustrating a configuration example of a bumper beam structure according to the first embodiment. The figure which shows the structural example regarding 1st area | region, 2nd area | region, etc. based on Embodiment 1. FIG. The figure which shows the modification of a bumper beam structure. The figure which shows the modification of a bumper beam structure.

  The following embodiment is one aspect of the present invention, and can be arbitrarily changed within the scope of the present invention. In each figure and description, the same reference numerals are given to the same members, and descriptions thereof are omitted as appropriate. The scale and shape of each part in each figure may be changed for convenience for explanation.

  Hereinafter, the front-rear direction of the vehicle is referred to as “front-rear direction X”, the width direction of the vehicle is referred to as “vehicle width direction Y”, and the direction of gravity is referred to as “up-down direction Z”. When the bumper beam structure is described using the front-rear direction X, the vehicle width direction Y, and the vertical direction Z, these directions are the vehicle front-rear direction X and the vehicle width direction when the bumper beam structure is mounted on the vehicle. It corresponds to Y and the up-down direction Z.

(Embodiment 1)
FIG. 1 shows a configuration example of a vehicle body front portion 2 of a vehicle 1 according to this embodiment. The vehicle body front part 2 mainly includes a bonnet 3, a pair of front fenders 4 provided continuously on the left and right sides of the bonnet 3, and a front bumper 5 provided continuously on the front side of the bonnet 3 and the front fender 4. And are configured integrally. A bumper beam structure 6 is provided so as to be covered with the bonnet 3, the front fender 4, the front bumper 5, and the like.

  The bumper beam structure 6 includes a bumper beam 7 extending in the vehicle width direction Y, a crash box 8 extending in the front-rear direction X, and a first region R1 in which the bumper beam 7 and the crash box 8 are welded (FIG. 3 and the like). A fixing portion 9 provided in the crash box 8 and capable of fixing the tow hook Fk in a state in which the tow hook Fk (see FIG. 2) is passed through the through hole 7a formed in the bumper beam 7. The bumper beam 7 includes a second region R2 (see FIG. 3 and the like) that is provided on the center Lc side in the vehicle width direction Y with respect to the first region R1 and increases the strength of the bumper beam 7. Yes.

  The bumper beam structure 6 absorbs the energy of the collision by being deformed when the vehicle 1 collides (mainly at the time of a frontal collision). Further, when it is difficult for the vehicle 1 to travel by itself, the vehicle 1 can be towed via the tow hook Fk fixed to the bumper beam structure 6.

  2A to 2C show a configuration example of the bumper beam structure 6. Of the bumper beam structure 6, the bumper beam 7 includes a front side member 10 and a rear side member 11. The front member 10 includes a front surface portion 10a extending in the vehicle width direction Y, an upper portion 10b rising rearward from the upper edge in the vertical direction Z of the front surface portion 10a, and a rear edge from the lower edge in the vertical direction Z of the front surface portion 10a. And a lower side portion 10c rising to the side.

  The rear member 11 includes a front surface portion 11a in which grooves that are uneven in the front-rear direction are provided alternately in the vertical direction, an upper portion 11b that rises rearward from the upper edge in the vertical direction Z of the front surface portion 11a, and a front surface portion 11a. And a lower side portion 11c that rises to the rear side from the lower edge of the vertical direction Z. The rear member 11 is fitted between the upper portion 10b and the lower portion 10c of the front member 10 so that the front portion 10a and the front portion 11a face each other. The upper part 10b of the front member 10 and the upper part 11b of the rear member 11 are spot welded.

  In the bumper beam structure 6, the crash box 8 includes a cylindrical portion 8 a that is crushed with a predetermined energy or more, and a flange portion 8 b that is attached to the upper side of the cylindrical portion 8 a. The upper surface of the flange portion 8b and the lower surface of the upper portion 11b of the rear member 11 are arc welded. A side member 12 extending in the front-rear direction X is provided on the opposite side of the crash box 8 from the bumper beam 7.

  In the bumper beam structure 6, the fixing portion 9 is provided on the cylindrical portion 8 a of the crash box 8. The crash box 8 is provided as a pair across the center Lc in the vehicle width direction Y, but the fixing portion 9 only needs to be provided in at least one of the pair of crash boxes 8. For example, the fixing portion 9 includes a screw receiving portion provided at a position corresponding to the through hole 7 a formed in the bumper beam 7.

  The towing hook Fk is provided with a ring portion Rg on one end side and a screw portion Bt on the other end side. The tow hook Fk is fixed to the vehicle 1 by fitting the screw portion Bt of the tow hook Fk into the screw receiving portion in a state where the tow hook Fk is passed through the through hole 7a formed in the bumper beam 7. can do. The ring portion Rg of the tow hook Fk is directly or indirectly connected to the towing vehicle, and the vehicle 1 is towed by the towing vehicle via the towing hook Fk.

  FIGS. 3A to 3B show configuration examples of the bumper beam structure 6 relating to the first region R1, the second region R2, and the like. When the vehicle 1 is towed, every time a load is applied to the towing hook Fk, stress concentrates on a region (first region R1) where the bumper beam 7 and the crash box 8 are arc-welded. Due to the structure in which a pair of crash boxes 8 are provided across the center Lc in the vehicle width direction Y, the first region R1 is provided at a position shifted from the center Lc in the vehicle width direction Y. Then, stress tends to concentrate particularly on the region P1 on the center Lc side in the first region R1.

  On the other hand, in the bumper beam structure 6, it is possible to cause an intensity difference between the inside and outside of the second region R2 in the bumper beam 7. As a result, a part of the stress concentrated on the first region R1 is applied to the vicinity of the second region R2 (for example, the region P2a, the region P2b, and the region P2c serving as the boundary of the second region R2 in the bumper beam 7. In particular, the first region R1. It can be dispersed in the region P2a) closer to the region R1. Therefore, the stress concentrated on the first region R1 can be relaxed.

  The second region R <b> 2 is configured as a convex portion provided on the bumper beam 7. According to this, the second region R2 can be easily provided, and a part of the stress concentrated on the first region R1 can be dispersed in the vicinity of the second region R2. The convex portion is configured by, for example, bending the upper surface of the bumper beam 7 in the vertical direction Z. According to this, since the convex portion is integrally formed with the bumper beam 7, it is easy to improve the structural stability. However, a member different from the bumper beam 7 may be attached to the upper surface of the bumper beam 7, and this may be the second region R2.

  In addition, the length (second length L2) in the vehicle width direction Y of the second region R2 is shorter than the length (first length L1) in the vehicle width direction Y of the first region R1. According to this, it is prevented that the intensity of the bumper beam 7 is excessively increased by the second region R2. Therefore, the stress concentrated on the first region R1 can be relaxed, and the function of the main body of the bumper beam structure 6 that is deformed and absorbs energy when the vehicle 1 collides can be easily secured.

  The second region R2 is provided within the first length L1 from the end of the first region R1 in the vehicle width direction Y. Further, the second region R2 is provided so as to include an edge portion of the bumper beam 7 in the front-rear direction X. In particular, in the vehicle 1, the second region R2 is provided so as to include the edge of the bumper beam 7 on the side where the first region R1 is provided. According to these, a part of the stress concentrated on the first region R1 can be more effectively dispersed in the vicinity of the second region R2. Therefore, the stress concentrated on the first region R1 can be more effectively reduced.

  Moreover, 2nd area | region R2 is provided so that the upper part 10b of the front side member 10 and the upper side part 11b of the rear side member 11 may be included in the spot welding (3rd area | region R3). According to this, a part of the stress concentrated on the first region R1 can be dispersed very effectively in the vicinity of the second region R2. Therefore, the stress concentrated on the first region R1 can be relieved very effectively.

(Other embodiments)
As described above, the bumper beam structure and one aspect of the vehicle according to the present invention have been described. However, the present invention is not limited to the above-described embodiment.

  4 (a) to 4 (c) and FIGS. 5 (a) to 5 (c) each show a modification of the bumper beam structure according to the present invention. Like the bumper beam structure 6A shown in FIG. 4A, the second region R2 may be provided at a position overlapping the first region R1 in the front-rear direction X. However, from the viewpoint of preventing the second region R2 from excessively increasing the intensity of the bumper beam 7, the second region R2 is positioned at a position that does not overlap the front-rear direction X with respect to the first region R1, as in the first embodiment. It may be advantageous to provide the region R2.

  A plurality of second regions R2 may be provided as in the bumper beam structure 6B illustrated in FIG. In the bumper beam structure 6B, the two second regions R2 are provided within the first length L1 from the end portion in the vehicle width direction Y of the first region R1.

  As in the bumper beam structure 6C shown in FIG. 4C, the second region R2 is provided so that the edge of the bumper beam 7 opposite to the edge on the side where the first region R1 is provided is included. May be. A second region R2 including an edge portion on the side where the first region R1 is provided and a second region R2 including an edge portion on the side opposite to the edge portion on which the first region R1 is provided are provided. Also good. A second region R2 including both an edge portion on the side where the first region R1 is provided and an edge portion opposite to the edge portion may be provided.

  Like the bumper beam structure 6D shown in FIG. 5A, a relatively long second region R2 in the vehicle width direction Y may be provided. In the bumper beam structure 6 of the first embodiment, the bumper beam 7 is provided so as to include one third region R3 provided at a predetermined interval in the vehicle width direction Y of the bumper beam 7. When the vehicle is towed, the first region R1 is provided. This is a preferred embodiment from the viewpoint of alleviating the stress concentrated on the. However, depending on the type and size of the vehicle 1, the second region R2 may include two or more third regions R3 (three in the example of FIG. 6A) as in the bumper beam structure 6D. It may be provided.

  Even if the second region R2 is provided outside the region within the first length L1 from the end portion in the vehicle width direction Y of the first region R1 as in the bumper beam structure 6E shown in FIG. 5B. Good. When a plurality of second regions R2 are provided, one or all of the second regions R2 may be outside the region within the first length L1.

  Like the bumper beam structure 6F shown in FIG. 5C, the edge of the bumper beam 7 on the side where the first region R1 is provided, and the edge opposite to the side where the first region R1 is provided, The second region R2 may be provided so as not to include any of the above.

  4 (a) to 4 (c) and FIGS. 5 (a) to 5 (c) described above are different in the first region R1 when the vehicle is towed depending on the type and size of the vehicle 1. From the viewpoint of alleviating the stress concentrated on the film, it may be a suitable mode.

  The present invention can be used in an industrial field related to a bumper beam structure and a vehicle to which a tow hook can be attached.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body front part 3 Bonnet 4 Front fender 5 Front bumper 6, 6A-6F Bumper beam structure 7 Bumper beam 7a Through hole 8 Crash box 8a Tube part 8b Flange part 9 Fixed part 10 Front side member 10a Front part 10b Upper part 10c Lower part 11 Rear member 11a Front part 11b Upper part 11c Lower part 12 Side member Fk Tow hook R1 First region R2 Second region R3 Third region

Claims (9)

A bumper beam structure provided at the front of the vehicle,
A bumper beam extending in the width direction of the vehicle;
A crash box extending in the longitudinal direction of the vehicle;
A first region where the bumper beam and the crash box are welded;
A fixing portion provided in the crash box and capable of fixing the tow hook in a state in which the tow hook is passed through a through hole formed in the bumper beam;
A bumper beam structure comprising: a second region of the bumper beam that is provided closer to the center in the width direction than the first region and increases the intensity of the bumper beam. The bumper beam structure according to claim 1,
The bumper beam structure, wherein the second region is a convex portion provided on the bumper beam. The bumper beam structure according to claim 1 or 2,
When the length in the width direction of the first region is the first length,
The bumper beam structure, wherein a length of the second region in the width direction is shorter than the first length. The bumper beam structure according to any one of claims 1 to 3,
The bumper beam structure, wherein the second region is provided at a position that does not overlap in the front-rear direction with respect to the first region. The bumper beam structure according to any one of claims 1 to 4,
When the length in the width direction of the first region is the first length,
The bumper beam structure, wherein the second region is provided within the first length from an end of the first region in the width direction. The bumper beam structure according to any one of claims 1 to 5,
The bumper beam structure, wherein the second region is provided so as to include an edge portion of the bumper beam in the front-rear direction. The bumper beam structure according to claim 6,
The bumper beam structure, wherein the second region is provided so as to include the edge portion of the bumper beam on the side where the first region is provided. The bumper beam structure according to any one of claims 1 to 7,
The bumper beam is configured by spot welding a plurality of members,
The bumper beam structure, wherein the second region is provided so as to include the spot-welded region. A bumper beam extending in the width direction of the vehicle,
A crash box extending in the longitudinal direction of the vehicle;
A first region where the bumper beam and the crash box are welded;
A fixing portion provided in the crash box and capable of fixing the tow hook in a state in which the tow hook is passed through a through hole formed in the bumper beam;
A vehicle comprising: a second region of the bumper beam which is provided closer to the center in the width direction than the first region and increases the intensity of the bumper beam.

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