Vehicle bumper structure

Abstract

To provide a bumper structure for a vehicle such that an absorber can preferably absorb a shock when a collision body collides against a bumper, the vehicle can show high beauty and the manufacturing costs for the vehicle can be reduced.SOLUTION: A bumper structure 10 for a vehicle comprises a radiator support 1, a front bumper 3 and an absorber 5. The front bumper 3 has a first wall 31 which extends in an up / down direction and a second wall 32 which connects with the first wall 31 and extends from the first wall 31 toward the radiator support 1. The absorber 5 has a main body part 5a and a restriction part 5e which extends from the main body part 5a toward the second wall 32. The restriction part 5e abuts on the second wall 32 from below when the front bumper 3 and a collision body 200 collide against each other so as to restrict upward tilting of the absorber 5 to above the vehicle body 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle bumper structure. [Background technology]

[0002] Patent Document 1 discloses a conventional vehicle bumper structure. This vehicle bumper structure includes a vehicle body frame, a bumper, and an absorber. The vehicle body frame is provided on a vehicle body. Specifically, the vehicle body frame is a radiator support lower cross member. Also, specifically, the bumper is a front bumper. The bumper is disposed in front of the vehicle body and spaced apart from the vehicle body frame.

[0003] The bumper is made of resin and has a first wall, a second wall, and an engagement rib. The first wall is located at the front end of the bumper and extends in the up-down direction. The first wall has a front surface and a back surface. The front surface faces the front of the bumper. As a result, the front surface constitutes the design surface of the first wall and, by extension, the bumper. The back surface is located opposite the front surface and faces the rear of the bumper. The second wall is located at the upper end of the bumper. The second wall is connected to the first wall and extends rearward from the first wall toward the vehicle frame. The engagement rib is integrally formed on the back surface of the first wall at a position lower than the second wall. The engagement rib extends rearward from the first wall toward the vehicle frame.

[0004] The absorber is fixed to the vehicle body frame and located between the vehicle body frame and the bumper. More specifically, the absorber is located between the vehicle body frame and the bumper at a position lower than the engagement rib. The absorber has a main body and a front wall. The main body extends in the front-rear direction and is fixed to the vehicle body frame. The front wall is integral with the main body at a front end of the main body and extends upward from the main body toward the engagement rib.

[0005] In this vehicle bumper structure, for example, if the bumper collides with an impact body from the front side of the vehicle body, the bumper is crushed toward the rear of the vehicle body due to the impact. At this time, the absorber is also crushed toward the rear of the vehicle body. In this way, the absorber absorbs the impact when the bumper collides with the impact body.

[0006] However, depending on the shape of the collision body and the bumper, when the bumper collides with the collision body from the front side of the vehicle body, the collision body may sink under the bumper. In this case, the impact of the collision with the collision body acts on the bumper from below the vehicle body, so the bumper and the absorber are lifted up to the top of the vehicle body. As a result, the end of the absorber that is closer to the bumper than the fixed part with the vehicle frame, that is, the front end side, tends to tilt upward. Here, by tilting the absorber upward in this way, the absorber is more likely to release the impact acting on it upward, and is less likely to be crushed toward the rear of the vehicle body. As a result, the absorber cannot suitably absorb the impact when the bumper collides with the collision body, and there is a concern that the movement of the collision body that collides with the bumper toward the rear of the vehicle body may increase accordingly.

[0007] In this regard, in the vehicle bumper structure described in Patent Document 1, if the shock absorber tilts upward due to an impact acting from below the bumper, the front end of the shock absorber abuts against the engagement rib of the bumper. As a result, in this vehicle bumper structure, the shock absorber is restricted from tilting upward after the front end of the shock absorber abuts against the engagement rib. Thus, in this vehicle bumper structure, even if the shock acts from below the vehicle body when colliding with a collision object, the shock absorber is easily crushed toward the rear of the vehicle body. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2007-91006 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the conventional vehicle bumper structure, since the engagement rib is formed on the back surface of the first wall in the bumper, sink marks due to the formation of the engagement rib inevitably occur in the first wall during the manufacturing of the bumper. As a result, depressions due to the sink marks occur on the surface of the first wall, which causes a problem of degrading the aesthetics of the bumper and, ultimately, the vehicle.

[0010] Therefore, in order to prevent the occurrence of the sink marks as much as possible, high quality control is required in the manufacture of the bumper, which reduces the manufacturing efficiency of the bumper in this vehicle bumper structure, making it difficult to reduce the manufacturing cost of the vehicle.

[0011] The present invention has been made in consideration of the above-mentioned conventional situation, and has as its object to provide a vehicle bumper structure that enables an absorber to suitably absorb the impact when the bumper collides with a collision body, enables the vehicle to exhibit a high level of aesthetic beauty, and enables reduction in the manufacturing costs of the vehicle. [Means for solving the problem]

[0012] The vehicle bumper structure of the present invention comprises: a vehicle body frame provided on a vehicle body; a bumper disposed on one or the other side of the vehicle body frame in a front-rear direction of the vehicle body and spaced apart from the vehicle body frame; an absorber that is fixed to the vehicle body frame and is located between the vehicle body frame and the bumper, and that absorbs the impact by being crushed in the front-rear direction due to an impact when the bumper collides with a collision object, The bumper is As it goes from the bottom to the top, it is inclined so as to move away from the vehicle body frame to one side or the other in the front-rear direction. The first wall extends, a second wall connected to an upper end of the first wall and extending from the first wall toward the vehicle body frame in the front-rear direction, The absorber includes a main body portion located below the second wall of the vehicle body and extending in the front-rear direction; a fixing portion provided on the main body portion and fixed to the vehicle body frame; The main body portion is provided with Located at the end portion on the bumper side in the front-rear direction, a restricting portion extending from the main body portion toward the second wall, The restricting portion restricts the absorber from tilting upwardly of the vehicle body by contacting the second wall from below when the bumper collides with a collision object. death, the restricting portion has a lower end connected to the main body portion, and a connecting portion that extends upward from the main body portion while inclining along the first wall as the restricting portion approaches the first wall in the front-rear direction; a vertical wall portion that is connected to an upper end of the connection portion and extends from the connection portion toward the second wall so as to be able to abut against the second wall at a substantially right angle; It is characterized by:

[0013] In the vehicle bumper structure of the present invention, when the bumper collides with a collision object, the impact acts on the bumper and the absorber from below the vehicle body, and if the absorber tilts upwardly of the vehicle body, the restricting portion abuts against the second wall of the bumper from below. As a result, in this vehicle bumper structure, after the restricting portion abuts against the second wall, the absorber can be restricted from tilting upwardly of the vehicle body, so that the absorber is suitably crushed toward the vehicle frame when the bumper collides with the collision object. As a result, in this vehicle bumper structure, the absorber can suitably absorb the impact when the bumper collides with the collision object, so that the amount of movement of the collision object from the bumper side toward the vehicle frame side can be reduced.

[0014] In this manner, by abutting the restricting portion against the second wall, in this vehicle bumper structure, it is not necessary to excessively increase the rigidity of the absorber itself in order to prevent the absorber from tilting when the bumper collides with a collision body. Also, in this vehicle bumper structure, it is not necessary to excessively increase the size of the absorber in the front-rear direction in order to ensure a crushing allowance for the absorber.

[0015] In this vehicle bumper structure, the restricting portion is brought into contact with the second wall to restrict the inclination of the absorber toward the upper side of the vehicle body. 2It is not necessary to form a dedicated abutment portion, such as the engagement rib, on the wall for abutting against the restriction portion. As a result, in this vehicle bumper structure, the first step of manufacturing the bumper is 2 Since no sink marks are formed on the wall due to the formation of the abutting portion, the appearance of the bumper can be improved. Furthermore, since this vehicle bumper structure does not require excessively strict quality control in the manufacture of the bumper, the manufacturing efficiency of the bumper can be improved.

[0016] Therefore, according to the vehicle bumper structure of the present invention, the absorber can effectively absorb the impact when the bumper collides with a collision body, the vehicle can have a high aesthetic appearance, and the manufacturing costs of the vehicle can be reduced.

[0017] In the vehicle bumper structure of the present invention, the restricting portion is located at the end portion on the bumper side in the front-rear direction. 。 this For In comparison with a case in which the restricting portion is located at a position farther from the bumper in the fore-aft direction, the restricting portion can reduce the inclination of the absorber, and therefore, in this vehicle bumper structure, the absorber can be more suitably crushed toward the vehicle body frame when the bumper collides with a collision object.

[0018] In addition, the Regulatory Department: Connect to the top of the connection part, Able to abut against the second wall at a nearly right angle Connection Part Extends from the wall to the second wall. It has a vertical wall portion Is 。 child As a result , against the second wall Vertical wall section Since the restricting portion can suitably abut against the absorber, the restricting portion can suitably restrict the inclination of the absorber. Vertical wall section Abuts against the second wall at a right angle means that Vertical wall section In addition to the case where the second wall abuts at a perfect right angle, due to manufacturing tolerances, Vertical wall section This includes cases where the first wall abuts against the second wall at an angle slightly different from a right angle.

[0019] In addition, the Regulatory Department 、 A contact portion that is located at the upper end of the vertical wall portion and extends longer in the front-rear direction than the vertical wall portion. of It is preferably provided.

[0020] In this case, since the contact area between the regulating portion and the second wall can be largely ensured by the contact portion, in this vehicle bumper structure, the inclination of the absorber can be suitably regulated.

Advantages of the Invention

[0021] According to the vehicle bumper structure of the present invention, when the bumper and the collision body collide, the absorber can suitably absorb the impact, the vehicle can exhibit a high aesthetic appearance, and the manufacturing cost of the vehicle can be reduced.

Brief Description of the Drawings

[0022] [Figure 1] FIG. 1 is a cross-sectional view showing the vehicle bumper structure of Example 1. [Diagram 2] FIG. 2 is a perspective view showing the absorber according to the vehicle bumper structure of Example 1. [Diagram 3] FIG. 3 is a cross-sectional view showing a state where the regulating portion abuts on the second wall according to the vehicle bumper structure of Example 1. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the main part showing a state where the regulating portion abuts on the second wall according to the vehicle bumper structure of Example 1. [Diagram 5] FIG. 5 is a cross-sectional view showing a state where the bumper and the absorber are crushed by the impact when the bumper collides with the collision body according to the vehicle bumper structure of Example 1. [Figure 6] FIG. 6 is an enlarged cross-sectional view of the main part showing the regulating portion and the like according to the vehicle bumper structure of Example 2. [Figure 7] FIG. 7 is an enlarged cross-sectional view of the main part showing a state where the regulating portion abuts on the second wall according to the vehicle bumper structure of Example 2. [Figure 8] FIG. 8 is a cross-sectional view showing the vehicle bumper structure of the comparative example. [Figure 9] FIG. 9 is a cross-sectional view showing a state where the absorber abuts on the second wall according to the vehicle bumper structure of the comparative example.

[0023] Hereinafter, first and second embodiments of the present invention will be described with reference to the drawings.

[0024] Example 1 As shown in Fig. 1, a vehicle bumper structure 10 of the first embodiment is used in a vehicle. The vehicle is specifically a passenger car, and has a vehicle body 100. The vehicle bumper structure 10 is disposed in the front part of the vehicle body 100.

[0025] The vehicle bumper structure 10 includes a radiator support 1, a front bumper 3, and an absorber 5. The radiator support 1 is an example of a "vehicle body frame" in the present invention. The front bumper 3 is an example of a "bumper" in the present invention.

[0026] In this embodiment, the up-down direction and the front-rear direction of the vehicle body 100 are defined by the arrows shown in Fig. 1. Here, the front of the vehicle body 100 corresponds to "one side of the front-rear direction" in the present invention, and the rear of the vehicle body 100 corresponds to "the other side of the front-rear direction" in the present invention. Also, in Fig. 2, the up-down direction and the front-rear direction of the vehicle body 100 are defined corresponding to Fig. 1, and the left-right direction, which is the width direction of the vehicle body 100, is defined. Then, in Fig. 3 and subsequent figures, the up-down direction and the front-rear direction are defined corresponding to Fig. 1. Note that these directions are merely examples for the sake of convenience of explanation.

[0027] The radiator support 1 is disposed in an engine room ER provided at the front of a vehicle body 100. The radiator support 1 is fixed to the vehicle body 100. The radiator support 1 is formed in a rectangular frame shape, and a radiator (not shown) is disposed therein. In addition, bolt holes 1a are formed in the lower part of the radiator support 1. Although detailed illustration is omitted, the bolt holes 1a are formed in three places in the lower part of the radiator support 1 corresponding to first to third fixing parts 5b to 5d described later. The shape of the radiator support 1 can be designed as appropriate.

[0028] The vehicle body 100 is also provided with an underpanel 9. The underpanel 9 is located at the front lower portion of the vehicle body 100, and covers an engine room ER from below the vehicle body 100. Note that, although detailed explanation and illustration are omitted, a power unit such as an engine is provided in the engine room ER. The vehicle body 100 is also provided with a rear bumper, as well as known control devices and the like necessary for the vehicle to travel.

[0029] The front bumper 3 is provided at the front end of the vehicle body 100. As a result, the front bumper 3 is disposed in front of the vehicle body 100 and spaced apart from the radiator support 1. The front bumper 3 is made of resin, and has a lower bumper portion 3a, an upper bumper portion 3b, and a grille 3c. The front bumper 3 extends in the left-right direction of the vehicle body 100.

[0030] The lower bumper portion 3a constitutes the lower portion of the front bumper 3. The lower bumper portion 3a has a first wall 31, a second wall 32, and a third wall 33. The first wall 31 is located at the front end of the lower bumper portion 3a and extends in the left-right direction and the up-down direction. More specifically, the first wall 31 extends at an incline toward the front of the vehicle body 100 as it goes from the bottom to the top. That is, the first wall 31 extends at an incline so as to move away from the radiator support 1 forward as it goes from the bottom to the top. In addition, the upper end of the first wall 31 is curved toward the rear of the vehicle body 100. In addition to the vertical length of the first wall 31, the angle at which the first wall 31 is inclined toward the front of the vehicle body 100 can be designed appropriately.

[0031] The second wall 32 is located at the upper end of the lower bumper portion 3a, and extends in the left-right direction corresponding to the first wall 31. The second wall 32 is connected to the upper end of the first wall 31, and extends from the first wall 31 toward the rear of the vehicle body 100, i.e., toward the radiator support 1. In this case, the second wall 32 extends approximately parallel to the front-rear direction of the vehicle body 100. Note that, as long as it is possible to cover a restricting portion 5e (described later) from above, the length by which the second wall 32 extends toward the radiator support 1, i.e., the length of the second wall 32 in the front-rear direction, can be designed appropriately.

[0032] The third wall 33 is located at the lower end of the lower bumper portion 3a, and therefore at the lower end of the front bumper 3, and extends in the left-right direction corresponding to the first wall 31. The third wall 33 extends at an incline toward the front of the vehicle body 100 as it goes from the bottom to the top, and is connected to the lower end of the first wall 31 at its upper end. That is, the third wall 33 extends at an incline away from the radiator support 1 toward the front as it goes from the bottom to the top, and is connected to the first wall 31. The first wall 31 and the third wall 33 form the lower bumper portion 3a in a shape that inclines toward the front of the vehicle body 100 as it goes from the bottom to the top. Here, the angle at which the third wall 33 inclines toward the front of the vehicle body 100 is smaller than the angle at which the first wall 31 inclines toward the front of the vehicle body 100. The shape of the third wall 33 can be designed as appropriate.

[0033] The upper bumper portion 3b is disposed above the lower bumper portion 3a. As a result, the upper bumper portion 3b constitutes the upper portion of the front bumper 3. The upper bumper portion 3b extends in the left-right direction as well as in the up-down direction. In addition, an opening 3d is formed between the upper bumper portion 3b and the lower bumper portion 3a. The opening 3d penetrates the front bumper 3 in the front-rear direction. The shapes of the upper bumper portion 3b and the opening 3d can be designed as appropriate.

[0034] The grill 3c is provided in the opening 3d. That is, the grill 3c is disposed between the lower bumper portion 3a and the upper bumper portion 3b in the vertical direction. The grill 3c is formed in a lattice shape extending in the left-right direction. The shape of the grill 3c can be designed as appropriate.

[0035] The absorber 5 is made of resin. As shown in FIG. 2, the absorber 5 has a main body portion 5a, first to third fixing portions 5b to 5d, and a restricting portion 5e. The main body portion 5a has a bottom wall 51, a peripheral wall 53, and a plurality of ribs 55. The bottom wall 51 is formed in a plate shape extending in the left-right direction and the front-rear direction. Here, the bottom wall 51 is designed so that the length in the left-right direction is longer than the length in the front-rear direction. In addition, the bottom wall 51 has a substantially arc shape curving forward when viewed from above.

[0036] The peripheral wall 53 is integrally formed on the outer periphery of the bottom wall 51. More specifically, the peripheral wall 53 is integrally formed on the outer periphery of the bottom wall 51 except for a portion of the front end of the bottom wall 51 where the restricting portion 5e is formed. The peripheral wall 53 extends upward from the bottom wall 51 substantially vertically.

[0037] Each rib 55 is formed integrally with the bottom wall 51. Each rib 55 extends substantially vertically upward from the bottom wall 51 and has a plate shape extending in the left-right or front-rear direction. A portion of each rib 55 is connected to the peripheral wall 53. The shape and number of each rib 55 can be designed appropriately depending on the rigidity required for the main body portion 5a.

[0038] The first to third fixing parts 5b to 5d are each integrally formed on the rear part of the main body part 5a. The first to third fixing parts 5b to 5d are each formed in a rectangular plate shape and extend rearward from the main body part 5a. The first to third fixing parts 5b to 5d are each integrally formed on the rear part of the main body part 5a. of At the rear, the first to third fixing parts 5b to 5d are disposed at equal intervals in the left-right direction. Here, of the first to third fixing parts 5b to 5d, the first fixing part 5b is disposed at the rightmost position, and the second fixing part 5c is disposed at the leftmost position. The third fixing part 5d is disposed between the first fixing part 5b and the second fixing part 5c. A through hole 57 is formed in each of the first to third fixing parts 5b to 5d. The through hole 57 passes through the first to third fixing parts 5b to 5d in the up-down direction. The number and shapes of the first to third fixing parts 5b to 5d can be designed as appropriate.

[0039] The restricting portion 5e is integrally formed at the front end of the main body portion 5a. More specifically, the restricting portion 5e is integrally formed at the front end of the bottom wall 51. As shown in FIG. 1, the restricting portion 5e is composed of a connection portion 501 and an upright wall portion 502.

[0040] The connection portion 501 extends upward from the front end of the bottom wall 51 while inclining forward so as to follow the first wall 31 of the lower bumper portion 3a. The standing wall portion 502 is connected to the upper end of the connection portion 501 and extends upward approximately vertically from the connection portion 501. As a result, the standing wall portion 502 is connected to the bottom wall 51, i.e., the main body portion 5a, via the connection portion 501. In addition, the standing wall portion 502 extends further upward than the peripheral wall 53 and each rib 55. As a result, the standing wall portion 502, and therefore the restricting portion 5e, are the parts of the absorber 5 that extend the furthest upward.

[0041] 2, the restricting portion 5e extends in the left-right direction along the bottom wall 51. The restricting portion 5e is connected to the peripheral wall 53 at both left and right ends and is integrated with the peripheral wall 53. As a result, the restricting portion 5e surrounds the bottom wall 51 together with the peripheral wall 53.

[0042] 1, in the absorber 5, bolts 13 are inserted into the through holes 57 of the first to third fixing portions 5b to 5d, respectively. Then, the bolts 13 are fastened to the bolt holes 1a of the radiator support 1, respectively, thereby fixing the first to third fixing portions 5b to 5d to the lower part of the radiator support 1. In this manner, the absorber 5 is disposed between the radiator support 1 and the front bumper 3 while being fixed to the radiator support 1. In other words, the absorber 5 extends forward from the radiator support 1 toward the lower bumper portion 3a of the front bumper 3 while being fixed to the radiator support 1.

[0043] By arranging the absorber 5 between the radiator support 1 and the front bumper 3 in this manner, the front end of the main body 5a of the absorber 5 is the end closest to the lower bumper 3a. Therefore, in the absorber 5, the restricting portion 5e is located closest to the lower bumper 3a in the front-rear direction and is adjacent to the lower bumper 3a. In addition, in the absorber 5, the restricting portion 5e and a part of the main body 5a are arranged between the first wall 31 and the second wall 32 of the lower bumper 3a. As a result, the main body 5a is located lower on the vehicle body 100 than the second wall 32. On the other hand, the second wall 32 is located above the restricting portion 5e and covers the restricting portion 5e from above.

[0044] Here, by fixing the absorber 5 to the radiator support 1, the main body portion 5a is inclined slightly downward from the radiator support 1 toward the front bumper 3. Meanwhile, in the restricting portion 5e, as described above, the standing wall portion 502 is connected to the bottom wall 51, i.e., the main body portion 5a, via the connection portion 501. The standing wall portion 502 extends upward at a substantially right angle to the connection portion 501. As a result, the standing wall portion 502 faces the second wall 32 from below at a substantially right angle.

[0045] 1, in a normal state in which a collision object 200 (see FIG. 3) is not colliding with the front bumper 3, a first gap S1 exists between the standing wall portion 502 and the second wall 32, i.e., between the restricting portion 5e and the second wall 32. In other words, in a normal state, the restricting portion 5e and the second wall 32 are vertically spaced apart by the first gap S1 and are not in contact with each other.

[0046] In the vehicle bumper structure 10 configured as above, when a collision object 200 collides with the front bumper 3 from the front of the vehicle body 100, the front bumper 3 is crushed toward the rear of the vehicle body 100 by the impact F generated at that time. Also, the absorber 5 is crushed toward the rear of the vehicle body 100 toward the radiator support 1 between the front bumper 3 and the radiator support 1. Then, as shown by the black arrow in FIG. 3, the collision object 200 moves relatively toward the rear of the vehicle body 100 while crushing the front bumper 3 and the absorber 5.

[0047] Here, the shock absorber 5 is crushed by the impact F, thereby absorbing the impact F and minimizing the impact F transmitted to the vehicle occupants and the radiator support 1, etc., and also reducing the amount of movement of the collision body 200 that moves relatively rearward of the vehicle body 100. Note that examples of the collision body 200 include pedestrians, roadside installations, and other vehicles.

[0048] Here, the front bumper 3 has a lower bumper portion 3a. The lower bumper portion 3a is shaped to be inclined toward the front of the vehicle body 100 from below to above by the first wall 31 and the third wall 33. This makes it easier for the collision object 200 to slip under the lower bumper portion 3a when colliding with the front bumper 3. In addition, the shape of the lower bumper portion 3a is combined with factors such as the shape of the collision object 200 and the angle at which the front bumper 3 and the collision object 200 collide, to make it easier for the collision object 200 that has collided with the front bumper 3 to slip under the lower bumper portion 3a.

[0049] Then, when the colliding body 200 collides with the front bumper 3, it slides under the lower bumper portion 3a, and an impact F acts on the lower bumper portion 3a from below the vehicle body 100, as shown by the white arrow in Fig. 3. Therefore, the front bumper 3, including the lower bumper portion 3a, is lifted above the vehicle body 100 and crushed backward by the impact F. The shock absorber 5 is also lifted above the vehicle body 100 by the impact F acting from below the vehicle body 100.

[0050] Here, the absorber 5 is fixed to the radiator support 1 through the first to third fixing portions 5b to 5d. These first to third fixing portions 5b to 5d are located at the rear of the main body portion 5a, i.e., at the rear of the absorber 5. For this reason, when the absorber 5 is lifted upwards of the vehicle body 100 by the impact F, the side of the absorber 5 closer to the lower bumper portion 3a, i.e., the front portion of the absorber 5, will tilt upwards of the vehicle body 100.

[0051] In this regard, in the absorber 5, a restricting portion 5e is formed at the front end of the main body portion 5a, and this restricting portion 5e extends further toward the upper side of the vehicle body 100 than the peripheral wall 53 and each rib 55 of the main body portion 5a. Therefore, in this vehicle bumper structure 10, if the front portion of the absorber 5 tilts upward due to the impact F, as shown in Figures 3 and 4, the vertical wall portion 502 of the restricting portion 5e abuts against the second wall 32 of the lower bumper portion 3a from below. At this time, the vertical wall portion 502 abuts against the second wall 32 from below at a substantially right angle. In other words, the vertical wall portion 502, and therefore the restricting portion 5e, extend from the main body portion 5a toward the second wall 32 so as to be able to abut against the second wall 32 at a substantially right angle.

[0052] Then, by the vertical wall portion 502 abutting against the second wall 32 in this manner, in this vehicle bumper structure 10, the front portion of the absorber 5 is restricted from tilting upwardly of the vehicle body 100. That is, as shown in Fig. 1, in this vehicle bumper structure 10, in a normal state, a first gap S1 exists between the vertical wall portion 502 and the second wall 32, and therefore, by the amount of the first gap S1, there is a room for the front portion of the absorber 5 to tilt upwardly due to an impact F acting from below the vehicle body 100, but after the vertical wall portion 502 abuts against the second wall 32, the front portion of the absorber 5 is restricted from tilting upwardly.

[0053] As a result, the absorber 5 is less likely to escape the impact F acting on itself by inclining upward. Therefore, the impact F acts strongly on the absorber 5 to crush the absorber 5 rearward, that is, to compress the absorber 5 in the front-rear direction. Therefore, in this vehicle bumper structure 10, as shown in FIG. 5, the absorber 5 is crushed rearward in accordance with the front bumper 3 being crushed rearward. At this time, the absorber 5 is crushed rearward toward the radiator support 1 while maintaining the state in which the vertical wall portion 502 is in contact with the second wall 32. As a result, in this vehicle bumper structure 10, even if the impact F when the front bumper 3 collides with the collision body 200 acts on the absorber 5 from below the vehicle body 100, the absorber 5 is crushed rearward toward the radiator support 1, and can absorb the impact F favorably. Furthermore, in this vehicle bumper structure 10, the amount of rearward movement of the vehicle body 100 in the collision body 200 can also be suitably reduced. In order to facilitate explanation, deformation of the front bumper 3 and the shock absorber 5 due to the impact F is illustrated in a simplified manner in Figures 3 to 5. The same applies to Figures 7 to 9 described below.

[0054] The above-mentioned function of the vehicle bumper structure 10 will be described in more detail by comparing it with a comparative example. In the vehicle bumper structure 10a of the comparative example shown in FIG. 8, unlike the vehicle bumper structure 10 of the first embodiment, the absorber 5 does not have the restricting portion 5e. Therefore, in the absorber 5, a peripheral wall 53 is also formed at the front end of the bottom wall 51, and only the peripheral wall 53 surrounds the bottom wall 51. The other configurations of the vehicle bumper structure 10a of the comparative example are similar to those of the vehicle bumper structure 10 of the first embodiment.

[0055] In the vehicle bumper structure 10a of the comparative example, by fixing the absorber 5 to the radiator support 1, in the normal state, a second gap S2 exists between the peripheral wall 53 and the second wall 32. That is, in the normal state, the peripheral wall 53 and the second wall 32 are separated in the up-down direction by the amount of the second gap S2. Here, this second gap S2 is larger than the first gap S1 shown in FIG.

[0056] For this reason, in the vehicle bumper structure 10a of the comparative example, if an impact F when the front bumper 3 collides with the collision body 200 acts on the absorber 5 from below the vehicle body 100, the front part of the absorber 5 is significantly tilted upward until the peripheral wall 53 abuts against the second wall 32. As a result, in the vehicle bumper structure 10 of the first embodiment, when the standing wall portion 502 abuts against the second wall 32, the collision body 200 is in the position shown by the imaginary line in Fig. 9, whereas in the vehicle bumper structure 10a of the comparative example, when the peripheral wall 53 abuts against the second wall 32, the collision body 200 moves significantly rearward relative to the vehicle body 100 as shown by the solid line in Fig. 9.

[0057] Furthermore, in the vehicle bumper structure 10a of the comparative example, the front part of the absorber 5 is greatly inclined toward the upper side of the vehicle body 100, so that the absorber 5 releases a large amount of the impact F acting on itself upward, and therefore the impact F is less likely to act on the absorber 5 to crush it backward. Furthermore, in such a posture inclined greatly upward, the absorber 5 is less likely to be suitably crushed backward toward the radiator support 1. For these reasons, in the vehicle bumper structure 10a of the comparative example, when the impact F when the front bumper 3 collides with the collision body 200 acts on the absorber 5 from below the vehicle body 100, the absorber 5 cannot suitably absorb the impact F, compared to the vehicle bumper structure 10 of the first embodiment. As a result, in the vehicle bumper structure 10a of the comparative example, the movement amount of the collision body 200 that moves relatively backward of the vehicle body 100 increases, compared to the vehicle bumper structure 10 of the first embodiment.

[0058] Incidentally, it is also conceivable that by increasing the rigidity of the absorber 5 itself, the absorber 5 would be less likely to tilt upward even if an impact F acts from below the vehicle body 100. However, in this case, the higher the rigidity of the absorber 5, the less likely the absorber 5 is to be crushed rearward, and the less likely it is to absorb the impact F. In this regard, in the vehicle bumper structure 10 of the first embodiment, the inclination of the absorber 5 can be restricted by abutting the restricting portion 5e against the second wall 32, so there is no need to excessively increase the rigidity of the absorber 5.

[0059] Furthermore, in this vehicle bumper structure 10, since the inclination of the absorber 5 is restricted, the absorber 5 is suitably crushed toward the rear, so that the absorber 5 can suitably absorb the impact F. Therefore, in this vehicle bumper structure 10, there is no need to make the absorber 5 excessively large in the front-rear direction in order to ensure a crushing margin for absorbing the impact F.

[0060] In this vehicle bumper structure, in order to restrict the inclination of the absorber 5 toward the upper side of the vehicle body, the vertical wall portion 502 of the restriction portion 5e is brought into contact with the second wall 32 of the lower bumper portion 3a. 2 Wall 3 2 In contrast, there is no need to form a dedicated abutment portion such as an engagement rib for abutting against the restriction portion 5e. As a result, in the vehicle bumper structure 10, 2 Wall 3 2 In contrast, no sink marks due to the formation of the abutment portion occur. This makes it possible to improve the aesthetic appearance of the front bumper 3, including the lower bumper portion 3a. In addition, with this vehicle bumper structure 10, it is not necessary to require excessively strict quality control in the manufacture of the front bumper 3, so the manufacturing efficiency of the front bumper 3 can also be improved.

[0061] Therefore, according to the vehicle bumper structure 10 of Example 1, the absorber 5 can suitably absorb the impact F when the front bumper 3 collides with the collision body 200, the vehicle can exhibit a high aesthetic appearance, and the manufacturing costs of the vehicle can be reduced.

[0062] In addition, in this vehicle bumper structure 10, the restricting portion 5e is located at the front end of the main body portion 5a, that is, at the end of the absorber 5 on the front bumper 3 side. As a result, in this vehicle bumper structure 10, it is possible to reduce the inclination of the absorber 5 when the standing wall portion 502 of the restricting portion 5e abuts against the second wall 32 of the lower bumper portion 3a, compared to a case in which the restricting portion 5e is located at a position away from the front bumper 3, such as at the rear end of the main body portion 5a. In other words, in this vehicle bumper structure 10, the absorber 5 is less likely to incline, and the absorber 5 is accordingly crushed toward the radiator support 1 in an appropriate manner.

[0063] Moreover, the restricting portion 5e extends upward from the main body portion 5a toward the second wall 32 so as to be able to abut against the second wall 32 at a substantially right angle. Therefore, the standing wall portion 502 can abut against the second wall 32 in an appropriate manner, so that the restricting portion 5e can appropriately restrict the inclination of the absorber 5.

[0064] Example 2 6, in the vehicle bumper structure 20 of the second embodiment, the restricting portion 5e of the absorber 5 is composed of a connection portion 501, a standing wall portion 502, and an abutment portion 503. The abutment portion 503 is integrally formed at the upper end of the standing wall portion 502. The abutment portion 503 extends longer in the front-rear direction than the standing wall portion 502. In addition to the length of the abutment portion 503 in the front-rear direction, the plate thickness of the abutment portion 503 can be designed as appropriate.

[0065] In addition, in the vehicle bumper structure 20, in a normal state, a first gap S1 exists between the abutment portion 503 and the second wall 32. That is, the abutment portion 503 and the second wall 32 are vertically spaced apart by the first gap S1. In addition, in a normal state, the abutment portion 503 and the second wall 32 are substantially parallel to each other. Here, substantially parallel includes a case where the abutment portion 503 and the second wall 32 are completely parallel to each other, and a case where the abutment portion 503 is slightly inclined with respect to the second wall 32 due to a manufacturing tolerance. In addition to the connection portion 501 and the vertical wall portion 502 in the restricting portion 5e, other configurations in the vehicle bumper structure 20 are similar to those in the vehicle bumper structure 10 of the first embodiment, and the same configurations are denoted by the same reference numerals and detailed description of the configurations is omitted.

[0066] 7, in this vehicle bumper structure 20, if the front part of the absorber 5 tilts upward on the vehicle body 100 due to an impact F acting from below the vehicle body 100, the contact portion 503 abuts against the second wall 32. As a result, in this vehicle bumper structure 20 as well, the inclination of the absorber 5 is restricted after the contact portion 503 abuts against the second wall 32.

[0067] Here, the abutment portion 503 has a plate shape extending longer in the front-rear direction than the standing wall portion 502. Therefore, the abutment portion 503 comes into surface contact with the second wall 32. As a result, in this vehicle bumper structure 20, the abutment portion 503 ensures a large contact area between the regulating portion 5e and the second wall 32, making it possible to suitably regulate the inclination of the absorber 5. Other functions of this vehicle bumper structure 20 are similar to those of the vehicle bumper structure 10 of the first embodiment.

[0068] In the above, the present invention has been described based on Examples 1 and 2. However, the present invention is not limited to the above Examples 1 and 2, and it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

[0069] For example, the vehicle bumper structure 10 of the first embodiment is disposed at the front of the vehicle body 100, but is not limited thereto, and the vehicle bumper structure 10 may be disposed at the rear of the vehicle body 100. In this case, the rear bumper corresponds to the "bumper" in the present invention. The absorber 5 is located forward of the rear bumper on the vehicle body 100. The vehicle bumper structure 10 of the first embodiment may be disposed at both the front and rear of the vehicle body 100. The same applies to the vehicle bumper structure 20 of the second embodiment.

[0070] In addition, in the vehicle bumper structure 10 of the first embodiment, the front bumper 3 may be configured by omitting the grille 3c and the opening 3d, or the front bumper 3 may be configured by only the lower bumper portion 3a. [Industrial Applicability]

[0071] The present invention can be used in vehicles such as transport vehicles and industrial vehicles in addition to passenger cars. [Explanation of symbols]

[0072] 1...Radiator support (vehicle frame) 3…Front bumper (bumper) 5…Absorber 5a...Body part 5b~5d...1st~3rd fixed part (fixed part) 5e…Regulation Department 10, 20...Vehicle bumper structure 31…1st wall 32…Second wall 100…Body 502…Standing wall section 503…Contact part F...Shock

Claims

1. A vehicle body frame provided on the vehicle body; a bumper disposed on one or the other side of the vehicle body frame in a front-rear direction of the vehicle body and spaced apart from the vehicle body frame; an absorber that is fixed to the vehicle body frame and is located between the vehicle body frame and the bumper, and that absorbs the impact by being crushed in the front-rear direction due to the impact when the bumper collides with a collision object, The bumper includes a first wall that extends obliquely from a lower portion of the vehicle body toward an upper portion of the vehicle body so as to be spaced apart from the vehicle body frame in one or the other direction in the front-rear direction; a second wall connected to an upper end of the first wall and extending from the first wall toward the vehicle body frame in the front-rear direction, The absorber includes a main body portion located below the second wall of the vehicle body and extending in the front-rear direction; a fixing portion provided on the main body portion and fixed to the vehicle body frame; a restricting portion provided on the main body portion and positioned at an end portion on the bumper side in the front-rear direction, the restricting portion extending from the main body portion toward the second wall, the restricting portion restricts the absorber from tilting upwardly of the vehicle body by contacting the second wall from below when the bumper collides with a collision object, the restricting portion has a lower end connected to the main body portion, and a connecting portion that extends upward from the main body portion while inclining along the first wall as the restricting portion approaches the first wall in the front-rear direction; A vehicle bumper structure comprising: a vertical wall portion connected to an upper end of the connection portion and extending from the connection portion toward the second wall so as to be able to abut against the second wall at approximately a right angle.

2. The vehicle bumper structure according to claim 1 , wherein the restricting portion is located at an upper end of the vertical wall portion, and has an abutment portion that extends longer in the front-rear direction than the vertical wall portion and is substantially parallel to the second wall.

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