JP4773792B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure, and more particularly, to a vehicle body structure that allows at least vertical displacement by reducing torsional rigidity with respect to a side frame while restricting rotation about a longitudinal center axis of the side frame. .

Conventionally, the structure of the front part of the vehicle body and the rear part of the vehicle body is configured by attaching bumper beams to side frames arranged on the left and right sides of the vehicle body. The bumper beam is generally attached to the side frame by fixing with a bolt (see, for example, Patent Document 1). When the bumper beam is connected to the side frame with the bolts in this way, the rigidity of the side frame in the vehicle width direction is increased, and at the same time, the torsional rigidity is excessively increased.
JP 2002-188953 A

  The torsional rigidity of the vehicle body is necessary to ensure a certain degree of vehicle body strength, but the torsional rigidity becomes higher than necessary because the displacement of the side frame is regulated by the bumper beam connected by bolts. End up. If the torsional rigidity becomes too high, if the vehicle body cannot be displaced in the region where the suspension cannot stroke due to the friction of the suspension at the beginning of turning, the amount of movement of the ground contact load between the turning inner and outer wheels will increase. For this reason, the ground contact property is deteriorated and the steering stability is lost.

  Also, when traveling over obstacles such as pebbles and unevenness existing on the road, the displacement in the torsional direction of the side frame is regulated, so the high frequency impact that occurs when traveling over the obstacle remains as it is. It is transmitted to the driver and makes you feel uncomfortable.

  An object of the present invention is to provide a vehicle structure capable of improving the steering stability of the vehicle and improving the ride comfort of the driver.

To solve the above problems, a first aspect of the present invention, a side frame extending in a right and left pair of vehicle longitudinal direction, the vehicle width by connecting the front ends or rear end portions of the pair of side frames A vehicle body structure including a bumper beam extending in a direction, wherein the pair of bumper beams includes a coupling portion that allows the pair of side frames to be displaced relative to each other at least in the vertical direction when an input is applied to the vehicle. It is attached to the pair of side frames.

  According to the first aspect of the present invention, it is possible to allow the side frame to be displaced in the vertical direction even when there is an input to the vehicle body as in the prior art.

  The invention according to claim 2 is the vehicle body structure according to claim 1, wherein the bumper beams are a pair of bumper beams arranged substantially in parallel in the vertical direction.

  According to the second aspect of the present invention, when the rigidity required as the bumper beam is insufficient with only one bumper beam, the necessary rigidity of the side frame can be ensured by using two bumper beams. it can.

  A third aspect of the present invention is the vehicle body structure according to the first or second aspect, wherein the bumper beam is formed on a front end surface, an upper and lower surface of the side frame, or a surface opposite to the pair of side frames. It is attached.

  According to invention of Claim 3, the attachment position to the side frame of a bumper beam can be selected.

  A fourth aspect of the present invention is the vehicle body structure according to any one of the first to third aspects, wherein the coupling portion includes a pillow ball or a bush.

  According to the fourth aspect of the present invention, when a pillow ball is used when there is an input to the vehicle body, the concave portion slides on the ball portion and the side frame is allowed to be displaced in the vertical direction. be able to. Further, when the bumper frame is attached via the bush, the bush can absorb the input to the vehicle body to some extent, and the side frame can be allowed to be displaced in the vertical direction.

  The invention according to claim 5 is the vehicle body structure according to any one of claims 1 to 3, wherein the coupling portion includes a receiving portion provided in the side frame, and the bumper beam. A locking portion engaged with the receiving portion provided is provided.

  According to the fifth aspect of the present invention, when there is an input to the vehicle body, the receiving portion provided on the side frame slides on the engaging portion provided on the bumper beam, and the side frame is displaced in the vertical direction. Can be tolerated.

  The invention according to claim 6 is the vehicle body structure according to any one of claims 1 to 4, wherein the bumper beam is provided with a turnbuckle.

  According to the sixth aspect of the invention, the length of the bumper beam can be adjusted by the turnbuckle to give a preload in the vehicle width direction to the side frame, and when the vehicle receives input, The frame can be allowed to be displaced in the vertical direction.

  A seventh aspect of the present invention is the vehicle body structure according to the first or second aspect, wherein the bumper beam is a round pipe-shaped member having flat plate portions formed at both ends, and the side frame is formed by bolts. It is attached to.

  According to the seventh aspect of the present invention, the round pipe-shaped bumper beam is fixed to the side frame by fixing with a bolt, so that the mounting operation becomes easy and the vehicle structure can be reduced in weight. Since the side frame is allowed to be displaced in the vertical direction, even when an input is applied from below the vehicle, it can be absorbed by the side frame to ensure steering stability and riding comfort performance.

  The invention according to claim 8 is the vehicle body structure according to claim 7, wherein a bumper beam temporary fixing bracket is attached to the side frame.

  According to the eighth aspect of the present invention, by temporarily fixing the bumper beam to the bumper beam temporary fixing bracket, positioning when the bumper beam is attached to the side frame can be facilitated.

The invention described in claim 9 is the vehicle body structure according to claim 7, wherein the side surface of the outer side frame, the direction of the front SL spaced apart from the upper end of the side surface over the predetermined interval the other side frame and the upper locking pieces are formed so as to protrude, and front Symbol lower side locking piece spaced apart from the lower end of the side surface over the predetermined distance is formed so as to protrude toward the other side frame And a bumper beam mounting bracket.

  According to the ninth aspect of the present invention, positioning when the bumper beam is attached to the side frame can be easily performed by using the bumper beam temporary fixing bracket.

  A tenth aspect of the present invention is the vehicle body structure according to the first aspect, wherein the side frame branches vertically into one end or both ends of a side frame main body extending in the vehicle front-rear direction. An end face is provided.

  According to the tenth aspect of the present invention, when two bumper beams are attached to the side frame, they can be attached at a distance from each other as compared with a side frame in which only one end face is formed at the end.

  According to the first aspect of the present invention, since the side frame is allowed to be displaced in the vertical direction, the side frame can be displaced in the vertical direction to absorb the input when there is an input from below the vehicle body. . For example, when the vehicle turns, a force to lift the inner ring is applied due to centrifugal force, but the side frame on the inner ring side is displaced downward by the vehicle weight, and the tire can be prevented from being separated from the road surface. Therefore, the ground contact property of the tire is enhanced, and the steering stability can be ensured.

  Further, according to the first aspect of the present invention, even when the tire rides on an obstacle on the road surface while the vehicle is traveling, the input from the tire causes the side frame to be displaced in the vertical direction to some extent. Since the input can be absorbed, the rider does not transmit the impact input to the vehicle body when riding on the obstacle, so that the riding comfort performance can be ensured.

  According to the second aspect of the invention, since the rigidity required for the bumper beam can be ensured by providing the pair of bumper beams, the safety of the vehicle occupant can be ensured even in the event of a collision.

  According to the third aspect of the present invention, since the mounting position of the bumper beam to the side frame can be selected, a degree of freedom in designing the vehicle body can be obtained.

  According to the fourth aspect of the present invention, when the bumper beam is attached to the side frame via the bush, the side frame is allowed to be displaced in the vertical direction by the bush. In this case, the side frame inside the turn can be displaced downward, and the side frame outside the turn can be displaced upward, the ground contact load of the inner ring can be maintained sufficiently, the ground contact can be ensured, and the steering stability can be ensured.

  In addition, when the bumper beam is attached to the side frame via a pillow ball, the concave portion fitted to the ball slides on the ball portion of the pillow ball, so that the side frame is allowed to be displaced in the vertical direction. Therefore, when the vehicle turns, due to its own weight, the side frame on the inside of the turn can be displaced downward, and the side frame on the outside of the turn can be displaced upward, the ground load of the inner ring is sufficiently maintained, and the grounding property is improved. Steering stability can be ensured.

  According to the fifth aspect of the present invention, when there is an input from below the vehicle body, the side frame on the input side moves up and down on the locking portion with which the receiving portion provided is engaged. Since it slides in the direction, it is possible to absorb the input from below, and even when the vehicle turns, the grounding property of the tire of the inner ring is high, so that the steering stability can be ensured. In addition, even when the tire rides on an obstacle while traveling, the shock generated when the tire is picked up is absorbed, and the shock generated when the vehicle gets on the driver is not transmitted, so that riding comfort performance can be ensured.

  According to the invention described in claim 6, by adjusting the length of the bumper beam by the turnbuckle and applying a predetermined preload to the side frame, the side frame can be moved in the vertical direction while improving the lateral response. Therefore, even when an input is applied from the lower side of the vehicle, it can be absorbed by the side frame to ensure steering stability and riding comfort performance.

  According to the seventh aspect of the present invention, since the round pipe-shaped bumper beam is attached to the side frame by bolting, the attachment work can be facilitated and the weight of the vehicle structure can be reduced. Since the side frame is allowed to be displaced in the vertical direction, even when an input is applied from below the vehicle, it can be absorbed by the side frame to ensure steering stability and riding comfort performance.

  According to the eighth aspect of the present invention, since it is possible to facilitate positioning when the bumper beam is attached to the side frame, it is possible to reduce time and effort when attaching the bumper beam to the side frame, and to assemble the vehicle body structure. The number of assembly steps in the process can be reduced.

  According to the ninth aspect of the present invention, when the bumper beam is attached to the side frame, the bumper beam can be temporarily placed near the attachment portion of the side frame, so that it is possible to reduce labor when attaching the bumper beam to the side frame. it can.

  According to the invention described in claim 10, since it is possible to attach to the side frame separated from the two bumper beams, it rotates about the central axis in the longitudinal direction of the side frame which reduces the steering stability. Can be more effectively prevented.

(First embodiment)
Hereinafter, the invention according to the present embodiment will be described with reference to the drawings. The invention according to the present embodiment is not limited to the illustrated example.

  FIG. 1 shows a first embodiment of the present invention and is a schematic perspective view of a vehicle body structure showing a state in which a bumper beam is attached. FIG. 2 is a schematic front view showing a state in which a bumper beam is attached to the left side frame. FIG. 3 is a schematic perspective view showing a state in which the bumper beam provided with the turnbuckle is attached to the front end portions of the left and right side frames.

  The mounting of the bumper beam to the side frame of the invention according to the present embodiment is the same at the front end portion and the rear end portion of the vehicle, and is the same at the left and right side frames, so the mounting of the bumper beam to the left side frame is the same. Only will be described.

  As shown in FIGS. 1 and 2, the vehicle body structure 2 of the vehicle body 1 is provided with a pair of left and right side frames 11 </ b> A and 11 </ b> A at the front end. As shown in FIG. 2, the side frame 11 </ b> A is formed in a substantially rectangular tube shape or a substantially hexagonal tube shape. The both end surfaces of the side frame 11A are closed. As shown in FIG. 1, bumper beams 13 and 13 extending in the vehicle width direction are attached to an end surface (hereinafter referred to as “front end surface”) 12 on the vehicle front side of the side frame 11A in parallel in the vertical direction. As shown in FIG. 2, the bumper beam 13 is attached to the side frame 11 </ b> A by a pillow ball 16 that is a coupling portion in which a concave portion 15 provided at an end of the bumper beam 13 is fitted into the ball portion 14 of the side frame 11 </ b> A. .

  As shown in FIG. 3, the bumper beam 19 used here may be a bumper beam 19 in which bumper beam members 17, 17 having one end connected to the side frame 11 </ b> A by a pillow ball 16 are connected by a turnbuckle 18.

  Thus, the bumper beam 19 connected by the turnbuckle 18 can be preloaded in the vehicle width direction of the side frames 11A and 11A by adjusting the turnbuckle 18, and the side frames 11A and 11A are vertically moved. Allows displacement in the direction.

  In the present embodiment, as shown in FIG. 4, a side frame 11 </ b> B having two end faces that are branched in the vertical direction at both ends of the side frame main body extending in the vehicle front-rear direction is used. It is good. The side frame 11B is formed such that the distance from the upper edge of the upper end surface to the lower edge of the lower end surface is longer than the vertical width of the side frame main body.

  When two bumper beams are attached to one end of the side frame, when the side frame 11B is used, the side frame is separated from the two bumper beams and attached to the side frame as compared with a side frame having only one end face at the end. Therefore, it is possible to more effectively prevent the rotation around the central axis in the longitudinal direction of the side frame that reduces the steering stability.

  The bumper beam 13 according to the present embodiment is attached to the side frame 11 </ b> A, that is, the vehicle body structure 2, with a pillow ball 16 provided at an end thereof and fitted with the ball portion 14 and the recess 15.

  When a vehicle having such a vehicle body structure 2 travels on an obstacle, an impact is input to the side frame 11A through the tire, but the ball portion 14 of the side frame 11A passes inside the recess 15 of the bumper beam 13. The position of the side frame 11A on the side that has been rotated and input is temporarily displaced upward. Therefore, since the input is absorbed by the displacement of the side frame, the impact when riding on the obstacle is absorbed, and transmission to the driver of the automobile is reduced.

  Further, when the vehicle turns while traveling, the ground contact load of the tire on the inner ring side is reduced by centrifugal force. However, in this case as well, the ball portion 14 of the side frame 11A rotates in the recess 15 of the bumper beam 13, so that the position of the side frame 11A is temporarily displaced in the vertical direction. For this reason, since the force of the tire floating due to the displacement of the side frame 11A is absorbed, a decrease in the load on the inner ring can be suppressed and the ground contact property can be maintained.

  As described above, according to the invention according to the present embodiment, the pillow ball 16 allows the side frame 11A to be displaced in the vertical direction. To absorb the input. For example, when the vehicle body 1 is turning, the load on the tire on the inner ring is reduced due to the centrifugal force applied to the vehicle, but the side frame 11A is displaced downward due to the vehicle weight, preventing the tire from being separated from the road surface. can do. Therefore, the ground contact property of the tire is enhanced, and the steering stability can be ensured.

  Further, even when the tire travels on an obstacle on the road surface while the vehicle is traveling, the input from the tire can be absorbed to some extent by the side frame 11A being displaced in the vertical direction. Since the impact input to the vehicle body 1 when riding on an obstacle is absorbed, transmission to the driver is reduced, and riding comfort performance can be ensured.

  That is, when the vehicle turns and the load on the turning inner wheel is greatly reduced, or when the vehicle runs on an obstacle, the ball portion 14 of the pillow ball 16 rotates in the recess 15 and the side frame 11A. Is allowed to be displaced in the vertical direction, so that it is possible to ensure steering stability and riding comfort performance.

  Further, by allowing the side frame 11A to be displaced in the vertical direction, the load movement to the left and right of the vehicle becomes gentle and the roll feeling is improved.

  Moreover, since the ground contact property of the tire is improved, the limit of acceleration in the lateral direction of the vehicle can be improved.

(Second embodiment)
Next, a second embodiment will be described. As shown in FIG. 5A, the side frame 21 of the vehicle body structure 20 is formed in a substantially rectangular tube shape or a substantially hexagonal tube shape, and extends in a substantially front-rear direction of the vehicle body 1. As shown in FIG. 5B, the bumper beam 22 is formed with annular annular portions 24 at both ends of a square cylindrical bumper beam main body 23 extending in the vehicle width direction. A cylindrical bush 25 is fixed to the annular portion 24 as a component of the coupling portion. The bush 25 is configured such that a cylindrical rubber 25b is accommodated in a cylindrical outer cylinder 25a, and an inner cylinder 25c is accommodated in the rubber 25b.

  Bolt holes 30 are formed in the front end surface 29 of the side frame 21. The bumper beam 22 passes through the bush 25 and is fixed to the side frame 21 by screwing a bolt 32 screwed into the weld nut 31 into the bolt hole 30.

  Note that the bumper beam used here may be one in which an annular portion 24 is formed only at one end and a bush 25 is fixed to the annular portion 24. In this case, the other end of the bumper beam is attached to the side frame by a pillow ball or a bolt.

  Further, like the bumper beam 33 shown in FIG. 6, a bumper beam member 33a, 33a extending in the vehicle width direction and connected by a turnbuckle 33b may be used.

  The bumper beam 33 is preloaded in the vehicle width direction of the side frames 21 and 21 by adjusting the turnbuckle 33b, so that the side frames 21 and 21 can be moved vertically while maintaining lateral responsiveness. Allows to be displaced.

  Also in the present embodiment, a side frame having two end faces that are branched in the vertical direction at both ends of the side frame main body can be used as in the side frame 11B shown in FIG.

  Next, a procedure for attaching the bumper beam 22 according to the present embodiment to the side frame 21 will be described with reference to FIG.

  After passing the bolt 32 of the bush 25, the bolt 32 is screwed into the weld nut 31. Then, the bolt 32 is screwed into a bolt hole 30 provided in the front end surface 29 of the side frame 21 to fix the bumper beam 22 to the side frame 21.

  When a vehicle having such a vehicle body structure 20 travels on an obstacle, an impact is input to the side frame through the tire, but the rubber 25b of the bush 25 is deformed by the input from the side frame 21. Therefore, the input side frame 21 is displaced upward by the amount of depression of the rubber 25b. Therefore, since the input is absorbed by the displacement of the bush 25 and the side frame 21, the impact generated by traveling on the obstacle is absorbed, so that the transmission to the driver is reduced.

  In order to secure the tire ground contact and improve the steering stability, the bushing rubber is increased in hardness in the vehicle width direction to suppress lateral deformation of the side frame 21 and lowered in the vertical direction by lowering the hardness in the vertical direction. It can be realized by taking a larger value. When it is desired to improve riding comfort, it can be realized by lowering the hardness in the vertical direction.

  Further, when the vehicle turns while traveling, the tire on the inner ring side receives a force to lift up due to the centrifugal force applied to the vehicle. However, in this case as well, the input to the side frame 21 is absorbed by the bush 25 due to its own weight, and the rubber 25b of the bush 25 is deformed, and the position of the side frame 21 is temporarily displaced downward. As a result, the ground contact load of the tire on the turning inner wheel side of the vehicle is not greatly reduced, and the ground contact property is sufficiently maintained.

  As described above, according to the invention according to the present embodiment, when the bumper beam 22 is attached to the side frame 21 via the bush 25, the side frame 21 is displaced in the vertical direction by the bush 25. Therefore, when the vehicle turns, the turning inner side frame 35 can be temporarily displaced downward and the turning outer side frame 35 can be temporarily displaced upward. It is possible to maintain the steering stability and the riding comfort performance.

  In addition, by changing the hardness of the rubber of the bush, it is possible to perform adjustment that emphasizes steering stability and tuning that improves riding comfort.

(Third embodiment)
Next, a third embodiment will be described. In the third embodiment, description of the same parts as those in the first embodiment will be omitted, and description will be made focusing on parts different from those in the first embodiment. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 7, the vehicle body structure 34 is provided with a side frame 35 formed in a substantially rectangular tube shape or a substantially hexagonal tube shape, and a bush 25 as a coupling portion is provided on a front end surface 36 of the side frame 35. A cylindrical bracket 37 is provided that has a shape that penetrates the inner wall of the inner cylinder 25 c in close contact with the inner cylinder 25 c and includes bolt holes (not shown) that are inserted into the side frames 21. A bush 25 is fitted into the bracket 37, and a bumper beam 22 is fixed to the side frame 35 by screwing a bolt 32 into a bolt hole (not shown) formed in the front end surface 36 of the side frame 35.

  In the present embodiment, the side frame and the bumper beam may be connected by a pillow ball. In this case, for example, a ball portion having a hole having the same shape as the bracket 37 is attached to the bracket 37, and the bumper beam 13 is attached to the side frame by fitting the recess 15 of the bumper beam 13 into the ball portion.

  Also in the present embodiment, a side frame having two end faces that are branched in the vertical direction at both ends of the side frame main body can be used as in the side frame 11B shown in FIG.

  Next, a procedure for attaching the bumper beam 22 according to the present embodiment to the side frame 35 will be described.

  A portion of the inner cylinder 25c of the bush 25 of the annular portion 24 of the bumper beam 22 is placed on the bracket 37, and the bush 25 is pushed into the bracket 37 so that the bracket 37 is fitted to the inner cylinder 25c. Then, the bumper beam 22 is fixed to the side frame 35 by screwing the bracket 37 with the bolt 32.

  When a vehicle having such a vehicle body structure 34 travels on an obstacle, the impact is input to the side frame 35. The bush 25 absorbs the impact, and the impact causes the rubber 25b of the bush 25 to move upward. Deform. Therefore, the input side frame 35 is displaced upward by the amount of deformation of the rubber. Therefore, since the shock is absorbed by the displacement of the bush 25 and the side frame 35, transmission to the driver is reduced.

  Further, even if the vehicle turns and a force that lifts the inner ring by the centrifugal force applied to the vehicle is applied, the force is absorbed by the bush 25, and the rubber 25b of the bush 25 is deformed, so that the side frame 35 moves in the vertical direction. The position is temporarily displaced. The ground contact load of the tire does not greatly decrease and remains in contact with the ground.

  As described above, according to the invention according to the present embodiment, when the vehicle travels over an obstacle, the side frame 35 is displaced in the vertical direction to absorb the impact and ensure riding comfort performance. Can do. In addition, even when the vehicle turns, it is possible to ensure that the side frame 35 moves up and down to prevent the tire from being separated from the road surface, and to maintain a grounded state, thereby ensuring steering stability. .

(Fourth embodiment)
Next, a fourth embodiment will be described.

  In the fourth embodiment, description of the same parts as those in the above embodiment will be omitted, and description will be made centering on parts different from the fourth embodiment. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 8, a hollow portion 42 is provided at the front end portion of the side frame 41 formed in a substantially rectangular tube shape or a substantially hexagonal tube shape of the vehicle body structure 40. A thin plate-like separator 43 is disposed in the cavity 42, and the cavity 42 is divided by the separator 43 in the vehicle front-rear direction. Further, the front end surface 44 of the side frame 41 is provided with a tube nut 45 that has an opening in the front end surface 44 and penetrates the separator 43. The bumper beam 22 is fixed to the side frame 41 by screwing the bolt 32 penetrating the bush 25 into the tube nut 45 to form a coupling portion. By adding the separator 43, the bolt 32 can be prevented from falling when there is an input, and the performance of the bush 25 can be maintained.

  Also in the present embodiment, a side frame having two end faces that are branched in the vertical direction at both ends of the side frame main body can be used as in the side frame 11B shown in FIG.

  Next, a procedure for attaching the bumper beam 22 according to the present embodiment to the side frame 41 will be described.

  The bumper beam 22 is disposed so that the inner cylinder 25 c of the bush 25 of the bumper beam 22 corresponds to the opening of the tube nut 45 of the side frame 41. Then, the tube nut 45 is screwed with the bolt 32 to fix the bumper beam 22 to the side frame 41.

  When a vehicle having such a vehicle body structure 40 travels on an obstacle, an impact is input to the side frame 41 through the tire, but the rubber 25b of the bush 25 is deformed upward. Therefore, the input side frame 41 is displaced upward by the amount of deformation of the rubber. Therefore, the impact is absorbed by the displacement of the bush 25 and the side frame 41, and therefore the impact when riding on the obstacle is difficult to be transmitted to the driver of the vehicle.

  Further, even when a force in a direction that turns the vehicle while the vehicle is traveling and lifts the inner tire is applied, the force is absorbed by the bush 25, and when the vehicle turns, the turning inner side frame 35 is lowered. Since the side frame 35 outside the direction and the turn can be temporarily displaced in the upward direction, the tire of the turning inner wheel can maintain a sufficient grounding property, and the steering stability can be ensured.

  As described above, according to the present embodiment, when the bumper beam 22 is attached to the side frame 41 via the bush 25, the side frame 41 is allowed to be displaced upward by the bush 25. Therefore, when the vehicle turns, the tire provided on the opposite side to the turning side can be kept grounded without being separated from the road surface, so that the driving stability can be ensured. it can.

(Fifth embodiment)
Next, a fifth embodiment will be described. Note that in the fifth embodiment, the description of the same parts as those in the above embodiment will be omitted, and description will be made focusing on parts different from the fifth embodiment. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 9, receiving portions 52, 52 extending in the vertical direction are provided in parallel on the front end surface 51 of the side frame 50 of the vehicle body structure 46 formed in a substantially rectangular tube shape or a substantially hexagonal tube shape. It has been. The receiving portion 52 is provided on a bottom wall portion 53 that is in contact with the front end surface 51, a column portion 54 provided on the bottom wall portion 53, and a column portion 54 having substantially the same shape as the bottom wall portion 53. A cross-sectional shape formed from the upper wall portion 55 is an H-shaped member.

  On the other hand, on the side surface 57 of the end portion of the bumper beam 56 facing the front end surface 51 of the side frame 50, locking portions 59, 59 extending in the vertical direction corresponding to the receiving portion 52 are attached. The locking portion 59 includes a bottom wall portion 60 that is in contact with the side surface 57, a first side wall portion 61 that protrudes in the direction of the front end surface 51 from both side portions of the bottom wall portion 60 in the vehicle width direction, and a second side wall portion 62. A first upper wall portion 63 projecting from the front end portion of the first side wall portion 61 toward the second side wall portion 62, and a second portion projecting from the front end portion of the second side wall portion 62 toward the first side wall portion 61. And an upper wall portion 64.

  Then, the bumper beam is clamped by sandwiching the upper wall portion 55 of the receiving portion 52 by the first side wall portion 61, the second side wall portion 62, the first upper wall portion 63, and the second upper wall portion 64 of the locking portion 59. 56 is fixed to the side frame 50 to form a coupling portion.

  Also in the present embodiment, a side frame having two end faces that are branched in the vertical direction at both ends of the side frame main body can be used as in the side frame 11B shown in FIG.

  Next, a procedure for attaching the bumper beam 56 according to the present embodiment to the side frame 50 will be described.

  The lower ends of the locking portions 59 of the bumper beam 56 are placed on the upper ends of the receiving portions 52 and 52 of the side frame 50. The space surrounded by the first side wall portion 61, the second side wall portion 62, the first upper wall portion 63, and the second upper wall portion 64 of the locking portions 59, 59 is the upper wall portion 55 of the receiving portion 52. Then, the bumper beam 56 is attached to the side frame 50 by pushing down the bumper beam 56 so that the receiving portion 52 is sandwiched in the vertical direction by the locking portion 59.

  When a vehicle including such a vehicle body structure 46 travels on an obstacle, vertical force is input to the side frame 50, but the receiving portion 52 of the side frame 50 moves upward along the locking portion 59. Slide toward Therefore, the input side frame 50 is displaced upward by the amount of sliding of the receiving portion 52, and the input is absorbed by the displacement of the side frame 50, so that transmission to the driver is reduced.

  Further, even when a force that lifts the tire by turning while the vehicle is moving is applied, the receiving portion 52 of the side frame 50 slides along the locking portion 59 of the bumper beam 56 and is displaced upward. Input is absorbed. Therefore, the ground contact load of the tire on the inside of the turn does not greatly decrease, and the ground remains on the ground. Since it is difficult to move laterally, steering stability performance is not sacrificed.

  As described above, according to the invention according to the present embodiment, when there is an input from below the vehicle body, the side frame 50 on which the input is performed is engaged with the receiving portion 52 provided. Because it slides upward on the latching portion 59, it can absorb the input from below, and even when the vehicle turns, the tire on the inside of the turn can be kept in sufficient contact with the ground. Stability can be secured. In addition, even when the tire rides on an obstacle while traveling, the shock generated when the tire is picked up is absorbed, and the shock generated when the vehicle gets on the driver is not transmitted, so that riding comfort performance can be ensured.

  Further, the acceleration limit in the lateral direction of the vehicle can be improved.

(Sixth embodiment)
Next, a sixth embodiment will be described. Note that in the sixth embodiment, description of the same parts as those in the above embodiment will be omitted, and description will be given centering on parts different from the sixth embodiment. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 10, the vehicle body structure 65 is provided with a receiving portion 52 extending in the vertical direction on a side surface 71 in the vicinity of the front end portion of the side frame 70 formed in a substantially rectangular tube shape or a substantially hexagonal tube shape. It has been. On the other hand, the end surface 73 of the bumper beam 72 is provided with a locking portion 59 extending in the vertical direction. The first side wall portion 61, the second side wall portion 62, the first upper wall portion 63, and the second upper wall portion 64 of the locking portion 59 are locked so as to sandwich the upper wall portion 55 of the receiving portion 52. Thus, the bumper beam 72 is attached to the side frame 70.

  Next, a procedure for attaching the bumper beam 72 according to the present embodiment to the side frame 70 will be described.

  The lower end of the locking portion 59 of the bumper beam 72 is placed on the upper end of the receiving portion 52 of the side frame 70. The space surrounded by the first side wall portion 61, the second side wall portion 62, the first upper wall portion 63, and the second upper wall portion 64 of the locking portion 59 is positioned on the upper wall portion 55 of the receiving portion 52. After the positioning is performed, the bumper beam 72 is pushed down, the receiving portion 52 is clamped by the locking portion 59, and the coupling portion is formed so that the bumper beam 72 is attached to the side frame 70.

  When a vehicle having such a vehicle body structure 46 travels on an obstacle, an impact is input to the side frame 70, but the receiving portion 52 of the side frame 70 faces upward along the locking portion 59. Slide. Therefore, the input side frame 70 is displaced upward by the amount of sliding of the receiving portion 52, and the input is absorbed by the displacement of the side frame 70, so that the impact is absorbed and transmission to the driver is reduced. Is done.

  Further, even if a force is applied to turn the vehicle while the vehicle is traveling and lift the tire on the inner wheel side of the turning, the receiving portion 52 of the side frame 70 slides along the locking portion 59 of the bumper beam 72 and moves upward. Due to the displacement, the input to the side frame 70 is absorbed. For this reason, the ground contact load of the turning inner ring remains grounded without significantly decreasing.

  As described above, according to the invention according to the present embodiment, when there is an input from below the vehicle body, the side frame 70 on the side on which the input has been received is engaged with the receiving portion 52 provided. Because it slides upward on the locking portion 59, the input from below can be absorbed, and even when the vehicle turns, it is possible to ensure steering stability by keeping the tire in contact with the ground. . In addition, even when the tire rides on an obstacle while traveling, the shock generated when the tire is picked up is absorbed, and the shock generated when the vehicle gets on the driver is not transmitted, so that riding comfort performance can be ensured.

  Since the bumper beam 72 is mounted between the side frames 70 and 70, the rigidity of the side frame in the vehicle width direction is improved, and the mounting position of the bumper beam is located at the rear of the vehicle as compared with the case where the bumper beam 72 is mounted on the front end surface of the side frame 70. Since the vehicle moves backward, the yaw moment of inertia can be reduced, and the controllability can be improved.

(Seventh embodiment)
Next, a seventh embodiment will be described. However, the scope of the invention is not limited to the illustrated examples. In addition, description is abbreviate | omitted about the part which is common in said embodiment, and it demonstrates focusing on a different part. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 11, the bumper beam 75 of the vehicle body structure 74 is a round pipe-shaped member having strength necessary for use as a bumper beam having flat plate portions 76 and 76 formed at both ends. Each flat plate 76 is formed with a through hole (not shown). A through hole (not shown) is formed in the upper surface 80 and the lower surface 81 near the front end of the side frame 79 in which a space is formed in the interior extending in the vehicle longitudinal direction.

  That is, the coupling portion is formed as follows. First, the bumper beam 75 is formed by screwing a bolt 84 penetrating the through hole formed in the flat plate portion 76 and the through hole of the upper surface 80 of the side frame 79 into the weld nut 83 positioned on the inner space side of the side frame 79. Attached to the side frame 79.

  On the lower surface 81 of the side frame 79, a bolt 84 passing through the through hole formed in the lower surface 81 and the through hole formed in the flat plate portion 76 of the bumper beam 75 is formed on the weld nut 83 positioned on the inner space side of the side frame 79. The bumper beam 75 is attached by screwing.

  Further, as shown in FIG. 12, the bumper beam 75 is attached to the side frame 79 through the bumper beam 75 placed on the upper surface 80 of the side frame 79 and the bumper beam 75 applied to the lower surface 81. The bolt 85 penetrating the hole may be screwed to the weld nut 83 on the surface of the flat plate portion 76 applied to the lower surface 81 and fixed to the side frame 79.

  Next, a procedure for attaching the bumper beam 75 according to the present embodiment to the side frame 79 will be described.

  The flat plate portion 76 of the bumper beam 75 is placed on the upper surface 80 of the side frame 79 so that the through hole formed in the flat plate portion 76 of the bumper beam 75 corresponds to the through hole formed in the upper surface 80 of the side frame 79. Then, a weld nut 83 is screwed into a bolt 84 that penetrates a through hole formed in the flat plate portion 76, and the bumper beam 75 is attached to the side frame 79.

  Further, the flat plate portion 76 of the bumper beam 75 is applied to the lower surface 81 of the side frame 79 so that the through hole formed in the flat plate portion 76 of the bumper beam 75 corresponds to the through hole formed in the lower surface 81 of the side frame 79. Then, a weld nut 83 is screwed by a bolt 84 that penetrates a through hole formed in the flat plate portion 76, and the bumper beam 75 is fixed to the side frame 79.

  When a vehicle having such a vehicle body structure 74 travels on an obstacle, the side frame 79 into which an impact is input to the side frame is flattened at the connection point with the bumper beams 75 and 75, so that the vertical rigidity is reduced. Is not so high, the bumper beams 75 and 75 are bent, and the side frame 79 is displaced upward by the amount of bending. At this time, the side frame 79 is also displaced upward by the amount by which the bumper beam is bent. Therefore, the input is absorbed by the deflection of the bumper beam 75 and the upward displacement of the side frame 79, and the impact is absorbed, so transmission to the driver is reduced.

  Further, even when the vehicle turns while traveling, the side frame 79 is also displaced in the vertical direction along with the bending of the bumper beam 75, so that the force to lift the turning inner wheel is absorbed, so that the ground load of the turning inner wheel is maintained. It is. The rotation about the longitudinal direction of the side frame 79 is regulated by fixing the bumper beam 75 to the upper surface 80 and the lower surface 81 of the side frame, which contributes to an improvement in steering stability performance.

  As described above, according to the invention according to the present embodiment, the round pipe-shaped bumper beam 75 is fixed to the side frame 79 by being fixed with the bolts 84, so that the mounting operation is facilitated and the vehicle structure is lightened. Can be achieved. Since the side frame 79 is allowed to be displaced in the vertical direction, even when an input is applied from below the vehicle, it can be absorbed by the side frame 79 to ensure steering stability and riding comfort. .

(Eighth embodiment)
Next, an eighth embodiment will be described with reference to FIGS. Note that in the eighth embodiment, description of the same parts as those in the above embodiment will be omitted, and description will be given focusing on parts different from those in the above embodiment. In the present embodiment, only the left portion in front of the vehicle will be described.

  As shown in FIG. 13, a bumper beam 75 is attached to the upper surface 88 of the side frame 87 of the vehicle body structure 86 by screwing a bolt 92 passing through a through hole formed in the flat plate portion 76 into a tube nut 91. Yes. On the other hand, on the lower surface 89 of the side frame 87, a bumper beam 75 is attached to the side frame 87 by screwing a bolt 92 passing through a through hole formed in the flat plate portion 76 into the tube nut 91. The coupling portion is formed in this way.

  Next, a procedure for attaching the bumper beam 75 according to the present embodiment to the side frame 87 will be described.

  As shown in FIG. 14, the tube nut 91 in which the bolt hole 97 is formed is attached to the side frame 87 by a welding point 93 in advance. As shown in FIG. 13, the flat plate of the bumper beam 75 so as to correspond to the bolt insertion port 97 of the tube nut 91 opened in the upper surface 88 of the side frame 87 in a bolt hole (not shown) formed in the flat plate portion 76 of the bumper beam 75. The part 76 is placed on the upper surface 88 of the side frame 87. Then, a bumper beam 75 is attached to the side frame 87 by screwing a bolt 92 passing through a through hole (not shown) formed in the flat plate portion 76 with the tube nut 91.

  Further, the flat plate portion 76 of the bumper beam 75 is applied to the lower surface 89 of the side frame 87 so that the through hole formed in the flat plate portion 76 of the bumper beam 75 corresponds to the bolt insertion opening opened in the lower surface 89 of the side frame 87. Then, a bumper beam 75 is attached to the side frame 87 by screwing a bolt 92 that penetrates a through hole (not shown) formed in the flat plate portion 76 into the tube nut 91.

  When a vehicle having such a vehicle body structure travels on an obstacle, an impact is input to the side frame 87. However, the bumper beam 75 bends upward starting from the attachment portion between the side frame 87 and the bumper beam 75 where there is no input. At this time, the side frame 87 is also displaced upward by the amount by which the bumper beam is bent. Therefore, the input is absorbed by the deflection of the bumper beam 75 and the upward displacement of the side frame 87, and the impact is absorbed, so transmission to the driver is reduced.

  Further, when the vehicle turns while traveling, a centrifugal force is generated in the vehicle, and thus a force to lift the tire on the inner wheel side of the turning is generated. However, in this case as well, the bumper beam 75 bends upward starting from the attachment portion with the side frame on the side where no input has been made. At this time, the side frame 87 is also displaced upward by an amount corresponding to the bending of the bumper beam 75. Therefore, since the force to lift the tire is absorbed by the deflection of the bumper beam 75 and the displacement of the side frame 87, the tire on the side opposite to the side where the vehicle turns is not lifted and remains in contact with the ground, which improves the handling stability. I can plan.

  In addition, since the tube nut 91 is welded to the upper and lower surfaces of the side frame, the bolt 92 is prevented from falling when a force is input to the bumper beam 75. Therefore, rotation about the central axis in the longitudinal direction of the side frame 87 is suppressed. Since the tube nut 91 is mounted in the vertical direction in the side frame 87, when the bolt 92 is fastened with high torque, the side frame 87 is prevented from buckling in the vertical direction, and the bolt 92 is free of tightening torque. The degree spreads. In this way, by installing the tube nut 91 in the side frame 87, the rigidity in the shear direction of the side frame 87 becomes stronger, so that the vertical displacement of the side frame 87 is allowed, but the seventh embodiment is implemented. From the form, the rotation of the side frame 87 around the central axis in the longitudinal direction can be restricted.

  As described above, according to the embodiment of the present invention, the vertical displacement of the side frame 87 is allowed, but the rotation of the side frame 87 about the central axis in the longitudinal direction is restricted from the seventh embodiment. become able to. Therefore, even when there is an input from the lower side of the vehicle, the vertical displacement can be allowed while suppressing the rotation around the central axis in the longitudinal direction of the side frame 87, and higher maneuvering stability and riding comfort performance can be achieved. Can be secured.

(Ninth embodiment)
The ninth embodiment will be described below with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples. In addition, description is abbreviate | omitted about the part which is common in the above-mentioned embodiment, and it demonstrates focusing on a different part. In the present embodiment, only the left side in front of the vehicle will be described.

  As shown in FIG. 15, the vehicle body structure 94 has through holes formed in the flat plate portions 76 and 76 in the upper surface 102 and the lower surface 103 near the front end of the side frame 101 formed in a substantially square tube shape or a substantially hexagon tube shape. A through hole (not shown) corresponding to is formed. A bumper beam positioning bracket 105 is provided on the side surface 104 of the side frame 101 on the outer side of the vehicle body.

  The bumper beam positioning bracket 105 includes an upper side locking piece 106 and a lower side locking piece 109. The upper side locking piece 106 is formed in the vicinity of a through hole (not shown) formed in the upper surface 102 and in the vicinity of the upper edge of the side surface 104. The upper side locking piece 106 is formed so as to protrude from the upper end of the side surface 104 in the direction of the left side frame (not shown) while being separated from the thickness of the flat plate portion 76 by substantially the same distance.

  On the other hand, the lower locking piece 109 is formed in the vicinity of a through hole (not shown) formed in the lower surface 103 and in the vicinity of the lower edge of the side surface 104. The lower side locking piece 109 is formed so as to protrude from the lower end of the side surface 104 in the direction of the left side frame (not shown) while being separated from the lower end of the side surface 104 by substantially the same distance as the thickness of the flat plate portion 76.

  The bumper beam 75 is locked and held by abutting the flat plate portion 76 against the back of the upper locking piece 106. On the other hand, the bumper beam 75 is locked and held by abutting the flat plate portion 76 against the back of the lower side locking piece 109.

  The bumper beams 75 and 75 are formed by passing through holes formed in the flat plate portions 76 and 76 and bolts 95 passing through the through holes formed in the upper surface 102 and the lower surface 103 of the side frame 101. It is attached to the side frame 101 by screwing with a weld nut 96 located on the surface side of the portion 76. The coupling portion is formed in this way.

  Next, a procedure for attaching the bumper beam 75 according to the present embodiment to the side frame 101 will be described.

  First, the flat plate portion 76 of the bumper beam 75 is abutted against the back portion of the upper side locking piece 106 and temporarily fixed to the side frame 101. Next, the flat plate portion 76 of the bumper beam 75 is abutted against the back portion of the lower side locking piece 109 and temporarily fixed to the upper surface 102 of the side frame 101.

  A through hole formed in the flat plate portion 76 of the bumper beam 75, a through hole (not shown) formed in the upper surface 102 of the side frame 101, a through hole (not shown) formed in the lower surface of the side frame 101, and a flat plate portion of the bumper beam 75 The bumper beams 75 and 75 are fixed to the side frame 101 by screwing bolts 95 passing through through holes (not shown) formed in 76 into the weld nuts 96.

  When a vehicle having such a vehicle body structure 94 travels on an obstacle, an impact is input to the side frame. At that time, the bumper beam 75 is bent upward together with the side frame 101, starting from the attachment portion with the side frame where the input is not performed. Therefore, the input is absorbed by the deflection of the bumper beam 75 and the upward displacement of the side frame 101, so that the impact is absorbed and the transmission to the driver is reduced.

  Further, when the vehicle turns while traveling, the vertical load on the inner ring is reduced on the vehicle body due to the centrifugal force. However, in this case as well, the bumper beam 75 bends upward starting from the attachment portion with the side frame 111 that has not been input. At this time, the side frame 101 is also displaced upward by an amount corresponding to the deflection of the bumper beam. Therefore, since the input is absorbed by the deflection of the bumper beam 75 and the displacement of the side frame 101, the tire on the side opposite to the side on which the vehicle turns does not float and remains in contact with the ground, thereby improving the steering stability.

  As described above, according to the invention according to the present embodiment, positioning when the bumper beam 75 is attached to the side frame 101 can be facilitated, and therefore, labor for attaching the bumper beam 75 to the side frame 101 is reduced. In addition, it is possible to reduce the number of assembly steps in the assembly process of the vehicle body structure.

(Tenth embodiment)
Next, a tenth embodiment will be described. Note that in the tenth embodiment, a description of the same parts as those in the above embodiment will be omitted, and description will be made focusing on parts different from those in the above embodiment. In the present embodiment, only the left portion in front of the vehicle will be described.

  As shown in FIG. 16, the vehicle body structure 110 is not shown corresponding to the through holes formed in the flat plate portions 76, 76 on the upper surface 112 and the lower surface 113 near the front end of the side frame 111 formed in a substantially rectangular tube shape. A through hole is formed. Further, a bumper beam mounting bracket 115 is provided on a side surface 114 of the side frame 111 on the outer side of the vehicle body.

  The bumper beam mounting bracket 115 includes an upper side locking piece 116 and a lower side locking piece 119. The upper side locking piece 116 is formed in the vicinity of a through hole (not shown) formed in the upper surface 112 and in the vicinity of the upper edge of the side surface 114. The upper side locking piece 116 is formed so as to protrude from the upper end of the side surface 114 in the direction of the left side frame (not shown) with a distance greater than the thickness of the flat plate portion 76. On the other hand, the lower locking piece 119 is formed in the vicinity of a through hole (not shown) formed in the lower surface 113 and in the vicinity of the lower edge of the side surface 114. The lower side locking piece 119 is formed so as to protrude from the lower end of the side surface 114 in the direction of the left side frame (not shown) while being spaced apart by more than the thickness of the flat plate portion 76.

  The bumper beams 75 and 75 are provided with bolts 95 that pass through the through holes formed in the flat plate portions 76 and 76 and the through holes formed in the upper surface 112 and the lower surface 113 of the side frame 111. It is attached to the side frame 111 by being screwed into a weld nut 96 positioned on the surface side of the flat plate portion 76. The coupling portion is formed in this way.

  Next, a procedure for attaching the bumper beam 75 according to the present embodiment to the side frame 111 will be described.

  First, the flat plate portion 76 of the bumper beam 75 is placed on the upper surface 112 of the side frame 111 so as to abut the back portion of the upper side locking side. Next, the flat plate portion 76 of the bumper beam 75 is placed on the lower side locking piece 119 so as to abut against the inner portion of the lower side locking side. Next, the flat plate portion 76 of the bumper beam 75 is placed on the lower surface of the side frame 111 so that a through hole (not shown) formed in the flat plate portion 76 of the bumper beam 75 corresponds to a bolt insertion port (not shown) opened in the lower surface 113 of the side frame 111. Assign to 113.

  A through hole (not shown) formed in the flat plate portion 76 of the bumper beam 75, a through hole (not shown) formed in the upper surface 112 of the side frame 111, a through hole (not shown) formed in the lower surface of the side frame 111, and the bumper beam 75 Bolts 95 that pass through through holes (not shown) formed in the flat plate portion 76 are screwed into the weld nuts 96 to fix the bumper beams 75 and 75 to the side frame 111.

  When a vehicle having such a vehicle body structure 94 travels on an obstacle, an impact is input to the side frame. At that time, the bumper beam 75 is bent upward together with the side frame 111, starting from the attachment portion with the side frame where the input is not made. Therefore, the input is absorbed by the deflection of the bumper beam 75 and the upward displacement of the side frame 111, so that the impact is absorbed and the transmission to the driver is reduced.

  In addition, when the vehicle turns while the vehicle is moving, a force is applied to the vehicle body to lift the turning inner wheel by centrifugal force. However, in this case as well, the bumper beam 75 bends upward starting from the attachment portion with the side frame 111 that has not been input. At this time, the side frame 101 is also displaced upward by an amount corresponding to the deflection of the bumper beam. Therefore, since the input is absorbed by the deflection of the bumper beam 75 and the displacement of the side frame 101, the tire on the side opposite to the side where the vehicle turns is not lifted but remains grounded.

  As described above, according to the invention according to the present embodiment, the bumper beam 75 can be temporarily placed near the attachment portion of the side frame 111 when the bumper beam 75 is attached to the side frame 111. The trouble at the time of attaching to can be reduced.

1 is a schematic perspective view showing a vehicle structure according to the present embodiment. It is a front side perspective view showing the end part of the vehicle front side of the vehicle structure concerning a first embodiment. It is a perspective view showing the modification of the vehicle structure concerning 1st embodiment. It is a schematic perspective view showing the modification of the side frame which concerns on this Embodiment. It is sectional drawing (a) showing the edge part of the vehicle front side of the vehicle structure concerning 2nd embodiment, and front view (b) showing the bumper beam used for this Embodiment. It is a vehicle front side perspective view showing the modification of the vehicle structure concerning 2nd embodiment. It is sectional drawing of the edge part of the vehicle front side of the vehicle structure concerning 3rd embodiment. It is sectional drawing of the edge part of the vehicle front side of the vehicle structure concerning 4th embodiment. It is a top view of the edge part of the vehicle front side of the vehicle structure concerning 5th embodiment. It is a top view of the edge part of the vehicle front side of the vehicle structure concerning 6th Embodiment. It is the front view which represented a part of edge part of the vehicle front side of the vehicle structure concerning 7th Embodiment by the cross section. It is the front view which represented a part of edge part of the vehicle front side of the modification of the vehicle structure concerning 7th Embodiment with the cross section. It is sectional drawing of the edge part of the vehicle front side of the vehicle structure concerning 8th embodiment. It is a schematic perspective view of the vehicle structure concerning 8th embodiment. It is the front view which represented a part of edge part of the vehicle front side of the vehicle structure concerning 9th Embodiment by the cross section. It is the front view which represented a part of edge part of the vehicle front side of the vehicle structure concerning 10th Embodiment by the cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Car body structure 11A Side frame 11B Side frame 12 Front end surface 13 Bumper beam 14 Ball part 15 Recess 16 Pillow ball 17 Bumper beam member 18 Turnbuckle 19 Bumper beam 20 Car body structure 21 Side frame 22 Bumper beam 23 Bumper beam main body 24 Annular part 25 Bush 25a Outer cylinder 25b Rubber 25c Inner cylinder 29 Front end face 30 Bolt hole 31 Weld nut 32 Bolt 33 Bumper beam 33a Bumper beam member 33b Turnbuckle 34 Car body structure 35 Side frame 36 Front end face 37 Bracket 40 Car body structure 41 Side frame 42 Cavity 43 Separator 44 Front end face 45 Tube nut 46 Car body structure 50 Side frame 51 Front end surface 52 Receiving portion 53 Bottom wall portion 54 Column portion 55 Upper wall portion 56 Bumper beam 57 End side surface 59 Locking part 60 Bottom wall part 61 First side wall part 62 Second side wall part 63 First upper wall part 64 Second upper wall part 65 Car body structure 70 Side frame 71 Side surface 72 Bumper beam 73 End face 74 Car body structure 75 Bumper beam 76 Flat part 79 Side frame 80 Upper surface 81 Lower surface 83 Weld nut 84 Bolt 85 Bolt 86 Car body structure 87 Side frame 88 Upper surface 89 Lower surface 91 Tubular nut 92 Bolt 93 Welding point 94 Car body structure 95 Bolt 96 Weld nut 101 Side frame 102 Upper surface 103 Lower surface 104 Side surface 105 Bumper beam positioning bracket 106 Upper side locking piece 109 Lower side locking piece 110 Car body structure 111 Side frame 112 Upper surface 113 Lower surface 114 Side surface 115 Bumper beam mounting bracket 116 Upper side locking piece 119 Lower side locking piece

Claims (10)

And the side frame which extends in the left-right pair of front-rear direction of the vehicle, a vehicle body structure comprising a bumper beam extending in the vehicle width direction and connecting the front ends or rear end portions of the pair of side frames, said bumper beam is vehicle body when there is an input to the vehicle, the pair of side frame via the coupling portion to allow the relative displacement to each other at least in the vertical direction, characterized in that it is attached to the pair of side frames Construction.   2. The vehicle body structure according to claim 1, wherein the bumper beams are a pair of bumper beams arranged substantially in parallel in the vertical direction.   The vehicle body structure according to claim 1, wherein the bumper beam is attached to a front end surface, an upper and lower surface of the side frame, or a surface opposite to the pair of side frames.   The vehicle body structure according to any one of claims 1 to 3, wherein the coupling portion includes a pillow ball or a bush.   The said coupling | bond part is equipped with the receiving part with which the said side frame was equipped, and the latching | locking part engaged with the said receiving part with which the said bumper beam was equipped. Item 4. The vehicle body structure according to any one of Items 3 to 4.   The vehicle body structure according to any one of claims 1 to 4, wherein the bumper beam is provided with a turnbuckle.   The vehicle body structure according to claim 1 or 2, wherein the bumper beam is a round pipe-like member having flat plate portions formed at both ends, and is attached to the side frame by bolts.   The vehicle body structure according to claim 7, wherein a bumper beam temporary fixing bracket is attached to the side frame. Wherein the side surface of the outside of the side frame, and the upper locking pieces previous SL spaced apart from the upper end of the side surface over the predetermined distance is formed so as to protrude toward the other side frame, the lower end of the front SL side 8. A bumper beam mounting bracket comprising: a lower locking piece formed so as to protrude in the direction of the other side frame at a predetermined distance from the lower side frame. Body structure described.   2. The vehicle body structure according to claim 1, wherein the side frame is provided with two end surfaces that are branched in the vertical direction at one end or both ends of a side frame main body extending in the vehicle front-rear direction.

Images