JP2007203853A - Shock absorbing structure of vehicular bumper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorbing structure of a vehicular bumper capable of resetting to the original state after a weak shock is applied without exchanging parts and capable of protecting an occupant by sufficiently absorbing a shock when a strong shock is applied. <P>SOLUTION: The shock absorbing structure of a vehicular bumper is structured of a bumper body 2 and a shock absorbing member 3. The bumper body 2 is structured of a main pipe formed with a pair of leg parts 2b by bending a pipe-like metal into a U-shape to form both ends in parallel with each other and a rising part 2c formed by bending a central part of the metal upward, and a reinforcing pipe 2d formed by welding the central part of the metal pipe bent to the U-shape to the rising part 2c of the main pipe for fixation and welding both the ends of the metal pipe to the main pipe at positions near the fixing members 2a of the leg parts 2b. With this structure, truss structure having the reinforcing pipe 2d as one side is formed in the bumper body 2. On the other hand, the shock absorbing member 3 is fixed to the vehicle body so that the bumper body is brought in contact with the upper end of the riding part 2c of the bumper body when the bumper body is shaken toward the vehicle body in a collision. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an impact absorbing structure in a vehicle bumper that absorbs an impact at the time of a vehicle collision and protects an occupant, and is particularly suitable for a small vehicle.

  In the bumper for a vehicle that absorbs the impact at the time of the collision of the vehicle, in order to reduce the troublesome part replacement due to the deformation at the time of the collision of the vehicle, the original state without replacing the parts after the deformation of the bumper at the time of the collision A bumper structure to be restored is desired. For example, in Patent Document 1 below, in a bumper attached to the front of the vehicle, the lower end of the bumper 11 is fixed so as to be swingable with respect to the vehicle body frame 12, and the upper portion of the bumper 11 is coupled to a spring 13 connected to the vehicle body frame 12. Thus, the bumper 11 is urged outward by the urging force of the spring 13 (FIG. 10).

In such an invention, when the degree of impact of the vehicle at the time of collision is small, the bumper 11 once deformed returns to the original state by the elastic force of the spring 13, so there is no need for replacement of parts and high convenience. It is. However, when the degree of impact of the vehicle at the time of the collision is large, since the shock absorption is covered only by the elastic deformation force of the spring 13, the shock absorption is insufficient, the impact on the occupant is increased, and safety is increased. There was a problem of losing.
JP-A-11-78733

In the present invention, in the shock absorbing structure of the bumper for a vehicle, when the impact at the time of collision is small, it is possible to return to the original state without absorbing the shock by replacing the bumper body and replacing the parts. When the impact at the time is large, the impact is sufficiently absorbed by the deformation of the bumper body and the impact absorbing member to protect the occupant.

  In order to achieve the above object, the present invention according to claim 1 is a vehicle bumper that is attached to at least one of a front part, a rear part, or a side part of a vehicle and absorbs an impact at the time of a collision comprising a bumper body and an impact absorbing member. The bumper main body includes a plurality of bumpers that are arranged in a substantially horizontal direction and fixed to the vehicle body, and a plurality of legs that extend outward from the fixed portions and the legs. From the outside of the vehicle to the legs, and rises to receive impact during a vehicle collision. When the vehicle is in a collision until a predetermined load is applied by connecting the standing parts and the legs. A reinforcing portion that maintains an angle between the upright portion and the leg portion; and the leg portion is reinforced by the reinforcing portion located between a connecting portion with the reinforcing portion and the fixed portion. Deformation with a lower impact force than the part The shock absorbing member has a shock absorbing portion that is received when the bumper main body swings toward the vehicle body side due to deformation of the shock absorbing portion due to an impact of an upright portion of the bumper main body during a vehicle collision. In addition, the impact is absorbed by contact with any part of the upright portion.

  According to another aspect of the present invention, there is provided a vehicle that is attached to at least one of a front portion, a rear portion, and a side portion of the vehicle and absorbs an impact at the time of a collision including a bumper body and an impact absorbing member. The bumper main body includes a plurality of bumpers that are arranged in a substantially horizontal direction and fixed to the vehicle body, and a plurality of legs that extend outward from the fixed portion. Each leg part is hung down from the outside of the vehicle with respect to the leg part and receives a shock at the time of a vehicle collision. The vehicle is connected to the leg part and the leg part until a predetermined load is applied. A reinforcing portion that maintains an angle between the drooping portion and the leg portion at the time of a collision, and the leg portion is positioned between a connecting portion with the reinforcing portion and the fixed portion by the reinforcing portion. Deformed with lower impact force than the reinforced part The shock absorbing member has a shock absorbing portion that absorbs a shock, and the shock absorbing member receives an impact at a hanging portion of the bumper body at the time of a vehicle collision, and the bumper main body swings toward the vehicle body side due to the deformation of the shock absorbing portion. When it moves, it contacts with any part of the hanging part to absorb the impact.

In addition, the “impact absorbing portion” of the bumper main body in claims 1 and 2 of the present invention corresponds to a part of the leg portion of the bumper main body and is located between the reinforcing portion and the fixed portion. . This shock absorbing part corresponds to a case where the structure is easily deformed by changing the structure of another part of the leg. Moreover, although the structure is not different from the other parts of the leg part, the case where the reinforcement part is provided in the other part of the leg part to be relatively easily deformed as compared with the other part is also applicable.

In order to achieve the above object, the present invention described in claim 3 is the shock absorbing structure for a vehicle bumper according to claim 1 or 2, wherein the reinforcing portion includes the standing portion or the hanging portion and the leg portion. The truss structure is formed such that the upright part or the hanging part is one side and the first leg part is one side. In addition, “long shape” refers to a material having a long length compared to the width and the diameter, such as a rod-shaped material or a flat-shaped material.

Furthermore, in order to achieve the object, the present invention described in claim 4 is the shock absorbing structure for a vehicle bumper according to claim 3, wherein the connection between the leg portion and the reinforcing portion in the bumper body is the fixed portion. The connection between the upright portion or the hanging portion and the reinforcing portion in the bumper body is to connect the vicinity of the upper end of the reinforcing portion near the upper end of the standing portion, or connect the vicinity of the lower end of the reinforcing portion to the lower end of the hanging portion. The bumper main body swings toward the vehicle body when the standing part or the hanging part of the bumper body receives an impact at the time of a vehicle collision, and the upper end of the standing part or the lower part of the hanging part comes into contact with the shock absorbing member to cause an impact. It absorbs.

Furthermore, in order to achieve the above object, the present invention described in claim 5 is the shock absorbing structure for a vehicle bumper according to any one of claims 1 to 4, wherein the reinforcing portion of the bumper body is made of a single pipe-shaped metal. It is formed by bending, and a pipe-shaped metal central part is connected to the upright part or the hanging part, and both ends are connected to the leg part.

In addition, in order to achieve the above object, the present invention described in claim 6 is directed to the shock absorbing structure for a vehicle bumper according to any one of claims 1 to 5, wherein the shock absorbing member is configured to stand up the bumper body at the time of a vehicle collision. A receiving portion having a contact surface that comes into contact with the standing portion or the hanging portion, a deforming portion that absorbs an impact by deformation, and a fixing portion for fixing to the vehicle body The receiving portion is formed by bending at least one of the upper end portion and the lower end portion outward of the vehicle.

<Invention of Claim 1>
According to the first aspect of the present invention, the bumper main body and the shock absorbing member are provided separately, and the bumper main body having the leg portion and the upright portion is provided with a reinforcing portion that connects the leg portion and the upright portion. Moreover, the leg part of a bumper main body has an impact absorption part between the connection part and fixed part with a reinforcement part. As a result, the bumper body swings toward the vehicle body around the shock absorbing portion while maintaining the angle between the leg part and the standing part due to the impact received by the standing part at the time of the vehicle collision, and thereafter, with the standing part of the bumper body. When the shock absorbing member comes into contact, the shock absorbing member receives an impact and deforms. Finally, the structure formed by the reinforcing portion, the upright portion, and the leg portion in the bumper body is destroyed, and the angle between the upright portion and the leg portion is widened to further absorb the impact. That is, the present invention can absorb an impact in three stages depending on the degree of impact absorption. Therefore, for example, when the impact is small, only the shock absorbing portion needs to be deformed. Therefore, it is sufficient to return the upright portion of the bumper body by subsequent measures, and the replacement of the parts is unnecessary. On the other hand, when the impact is large, the impact applied to the bumper body can be further absorbed by the deformation of the impact absorbing member and the reinforcing portion of the bumper body. Therefore, the impact on the occupant can be reduced and the safety is high. In addition, if the rigidity of the structure formed by the reinforcing part, the standing part and the leg part of the bumper body is set lower than the rigidity of the shock absorbing member, the reinforcing part etc. in the bumper body will be destroyed first. Then, after the angle between the standing portion and the leg portion is widened, the shock absorbing member is deformed. However, since the deformation at the time of collision can be easily predicted and the shock absorbing member at the time of the collision can be reliably brought into contact with the standing part of the bumper body, the rigidity of the reinforcing part of the bumper body is set higher than the shock absorbing member. It is better to do.

<Invention of Claim 2>
According to a second aspect of the present invention, the bumper main body and the shock absorbing member are separately provided, and the bumper main body having the leg portion and the upright portion is provided with a reinforcing portion that connects the leg portion and the upright portion. Moreover, the leg part of a bumper main body has an impact absorption part between a connection part and a fixed part with a reinforcement part. As a result, the bumper body swings toward the vehicle body around the shock absorbing portion while maintaining the angle between the legs and the hanging part due to the impact received by the hanging part at the time of the vehicle collision. When the impact absorbing member comes into contact, the impact absorbing member is subjected to an impact and deforms. Finally, the structure formed by the reinforcing portion, the hanging portion, and the leg portion in the bumper body is broken, and the angle between the hanging portion and the leg portion is widened to further absorb the impact. That is, the present invention can absorb an impact in three stages depending on the degree of impact absorption. Therefore, for example, when the impact is small, only the shock absorbing portion needs to be deformed. Therefore, it is sufficient to return the hanging portion of the bumper main body by the subsequent measures, and there is no need to replace parts. On the other hand, when the impact is large, the impact can be further absorbed by deformation of the impact absorbing member and the reinforcing portion of the bumper body. Therefore, the impact on the occupant can be reduced and the safety is high. In addition, if the rigidity of the structure formed by the reinforcing part, the hanging part and the leg part of the bumper body is set lower than the rigidity of the shock absorbing member, the reinforcing part etc. in the bumper body will be destroyed first. After the angle between the drooping portion and the leg portion is widened, the shock absorbing member is deformed. However, since the deformation at the time of collision can be easily predicted and the impact absorbing member at the time of the collision can be reliably brought into contact with the hanging part of the bumper body, the rigidity of the reinforcing portion of the bumper body is set higher than that of the shock absorbing member. Is preferable.

<Invention of Claim 3>
According to the vehicle bumper according to the third aspect, since the truss structure having the standing part or the hanging part, the leg part, and the reinforcing part in each side of the bumper body is formed, the reinforcing part is not complicated. The rigidity of the bumper body can be secured.

<Invention of Claim 4>
According to the vehicle bumper according to claim 4, the bumper body is configured such that the connection between the leg portion and the reinforcing portion is in the vicinity of the fixed portion of the leg portion, and the upper end of the standing portion and the upper end of the reinforcing portion are connected, or the lower end of the hanging portion And the lower end of the reinforcement part was connected. Therefore, in the truss structure having the reinforcing portion as one end, one side can be formed by the entire standing portion or the entire hanging portion, and the other side can be formed by most of the leg portion. Therefore, it is possible to reduce the risk that each side forming the truss structure is deformed at an inadvertent part. Also, in the event of a collision, it swings toward the vehicle body while maintaining the truss structure with the rising part or hanging part as one side centering on the shock absorbing part of the bumper body, but the trajectory of the standing part's tip or hanging part's lower end is predicted. Since it is easy to clarify the fixing position of the shock absorbing member to the vehicle body, the design is excellent.

<Invention of Claim 5>
According to the vehicle bumper of the fifth aspect, since the reinforcing portion is formed by bending a single pipe-like metal, it can contribute to a reduction in the number of parts.

<Invention of Claim 6>
According to the vehicle bumper of the sixth aspect, since at least one of the upper end portion or the lower end portion of the receiving portion of the shock absorbing member is formed by bending toward the outside of the vehicle, After the tip of the upright part or hanging part contacts the receiving part, the contact position of the rising part or hanging part in the bumper body and the receiving part of the shock absorbing member changes due to the deformation of the deformed part in the shock absorbing member and the swing of the bumper body. Even so, the contact between the two can be maintained and the impact of the bumper body can be reliably transmitted to the impact absorbing member.

  Embodiments of the present invention will be described below.

  The shock absorbing structure for a vehicle bumper according to the present invention includes a bumper body 2 shown in FIG. 1 and a shock absorbing member 3 shown in FIG.

The bumper body 2 includes main pipes 2b and 2c, a reinforcing pipe 2d (reinforcing portion in claims), and a fixing member 2a (fixed portion in claims). The pipes 2b and 2c are formed by bending the pipe-like metal into a U shape to form a pair of parallel leg portions 2b at both ends, and the bent pipe-shaped metal central portion is located above the leg portion 2b. And the standing part 2c which stands up outward is formed. Further, as a reinforcing pipe 2d for supporting the main pipes 2b and 2c, the central part of the metal pipe bent in a U-shape is welded and fixed near the upper end of the standing part 2c of the main pipe, and both ends of the metal pipe are respectively connected to the main pipe. These are leg portions 2b, and are welded and fixed in the vicinity of a fixed member 2a described later. The fixed member 2a is a pair of flat metal plates provided with flanges at both ends and fixed to the vehicle body by screwing or the like, and is fixed by welding to both ends of the pipes 2b and 2c. Here, the bumper body 2 viewed from the width direction (hereinafter referred to as the width direction) when the extending direction of the leg portion 2b of the bumper body 2 is the front surface, the standing portion 2c, the leg portion 2b, and the reinforcing pipe 2d are connected to each side. Forming a truss structure. Here, it is generally known that the truss structure has a stable strength. Therefore, the portion between the connecting portion of the leg portion 2b to the reinforcing pipe 2d and the fixed member 2a (the shock absorbing portion in the present claims) is another portion of the leg portion 2b that is one side of the truss structure or the standing portion. The strength is relatively lower than 2c and the reinforcing pipe 2d, and it is easy to deform. The reinforcing pipe 2d is prepared by preparing two rod-shaped pipes that are not bent, and by connecting one end of each pipe to the end portion 2c end portion and the other end to the leg portion 2b. It is also possible to form truss structures at both ends in the direction. However, as in the present embodiment, the impact is distributed to the entire bumper body 2 by “connecting the upper end of the reinforcing portion to the central portion in the width direction of the bumper body and connecting the lower end of the reinforcing portion to the leg portion”. This makes it easy to reduce the deformation at both ends in the width direction of the upright portion 2c at the time of a collision, and eliminates the possibility of large deformation only at the central portion, so that the shock can be reliably transmitted to the shock absorbing member 3.

On the other hand, the impact absorbing member 3 includes a receiving portion 3a, a deforming portion 3b, and a fixing portion 3c. The receiving portion 3a is made of a metal plate having a flange 3a2 at the top and bottom and a contact surface 3a1 between the top and bottom flanges 3a2. When the bumper body 2 described above swings toward the vehicle body at the time of a collision, the bumper body rises. The upper end of the part is in contact with the contact surface 3a1. By having the upper and lower flanges 3a2, even when the shock absorbing member 3 is deformed after the upright portion 2c of the bumper body 2 comes into contact with the contact surface 3a1 and the bumper body is further rotated, both contact states are maintained. Can be maintained.

On the other hand, the deforming portion 3b is formed of a hollow quadrangular columnar metal cylinder. By providing a plurality of notches 3b1 on the surface, the deforming portion 3b is deformed when the receiving portion 3a receives the impact of the bumper body 2. Therefore, the structure is easy to absorb the impact. In addition, the surface area of the contact surface 3a1 of the receiving part 3a mentioned above is made larger than the cross-sectional area parallel to it in the deformation | transformation part 3b. Thereby, without increasing the size of the impact absorbing member 3, the contact between the upper end of the upright portion 2c of the bumper body 2 and the impact absorbing member 3 at the time of collision is ensured, and the design and productivity are excellent. preferable.

Furthermore, the fixing part 3c is welded and fixed to the rear end of the deforming part 3b, and is made of a flat metal for fixing to the vehicle body by screwing.

Next, the mounting structure for mounting the shock absorbing structure of the vehicle bumper according to the present invention described above to the front part of the single-seater electric vehicle 1 shown in FIG. 9 will be described in detail. Note that only the structure in front of the vehicle body related to the present embodiment will be described in detail, and the description of the vehicle rear and the like will be omitted. As shown in FIG. 3, the dash panel lean reinforcement 5 is fixed to the front of the electric vehicle (left side in FIG. 9) on the frame ASSY 4 by screws. Then, the bumper body 2 is screwed to the front end of the frame ASSY 4 by the fixing portion 2a. On the other hand, the shock absorbing member 3 is fixed to the front surface of the dash panel lean reinforcement 5 with screws by a fixing portion 3c. At this time, the connecting portion between the reinforcing pipe 2d and the leg 2b in the bumper body 2 is positioned in the vicinity of the fixed portion 2a, and the bumper body 2 is viewed from the side (side view when the extending direction of the leg 2b is the front). ) When the distance between the upper and lower end connecting portions in the reinforcing pipe 2d is a side view of the center position in the height direction of the fixed portion 2a of the bumper body and the center position in the height direction of the receiving portion 3a in the shock absorbing member 3. It is desirable that the distance is equal to the linear distance (FIG. 4). Due to such a structure, the bumper body 2 has the reinforcing pipe 2d centered on any part (impact absorbing part in claims) between the connecting part of the reinforcing pipe 2d and the leg part 2b and the fixed part 2a at the time of collision. The upper end of the upright portion 2c is brought into contact with the receiving portion 3a of the shock absorbing member 3 in order to swing toward the vehicle body while maintaining a truss structure having three sides of the leg portion 2b and the upright portion 2c. 3 can be transmitted.

The front of the electric vehicle having the shock absorbing structure for a vehicle bumper as described above is a hood panel 6, a bumper cover 7, and a front fender RH panel 9 made of an elastic resin mainly composed of polypropylene as shown in FIG. The front fender LH panel 8 is covered with each component.

Next, the case where the electric vehicle having the bumper structure according to the present invention described above collides with an obstacle during traveling will be described in detail.

  First, when the impact level is small, such as a collision during low-speed traveling, the standing portion 2c of the bumper body 2 receives an impact via the bumper cover 7 on the front side of the vehicle. The bumper body 2 has a truss structure having three sides of the reinforcing pipe 2d, the upright part 2c, and the leg part 2b, so that the connecting part and the fixed part of the leg part 2b with the reinforcing pipe 2d are maintained while maintaining the structure. Bend between 2a. As a result, the upright portion swings toward the shock absorbing member attached to the vehicle body. However, since the impact is mild, the swing of the bumper body 2 stops without the upper end of the upright portion 2c and the receiving portion 3a of the impact absorbing member 3 coming into contact with each other. Thereafter, by returning the part bent by the collision of the bumper main body 2 to the original state by an artificial or mechanical work using a tool or the like, it can be used again without exchanging the parts. In addition, since resin panels, such as a bumper cover, have elasticity, although it deform | transforms temporarily by a collision, it can return to the original state with artificial force.

  On the other hand, when the impact level is large, such as a collision during high-speed driving, the bumper body 2 is deformed in the same way as during the low impact described above, while the bumper body 2 maintains the truss structure with the reinforcing pipe 2d as one side. Rotate to the side. At this time, due to a large impact, the upper end of the upright portion 2 c of the bumper body 2 comes into contact with the receiving portion 3 a of the shock absorbing member 3. As a result, the impact received by the upright portion 2c of the bumper body 2 is transmitted to the impact absorbing member 3, and the deformed portion 3b of the impact absorbing member 3 is deformed to absorb the impact. Next, when the shock absorption is insufficient due to the deformation of the deformable portion 3b in the shock absorbing member 3, the truss structure with the reinforcing pipe 2d as one side is deformed, and the angle between the leg 2b and the upright portion 2c is large. As a result, the shock is further absorbed.

As described above, the vehicular bumper according to the present invention includes the bumper main body 2 swinging, the deformation of the deformation portion 3b in the shock absorbing member 3, and the reinforcing pipe 2d in the bumper main body 2 when the impact level at the time of collision is large. Since the impact can be absorbed in three stages of deformation of the truss structure on one side, it is possible to reduce the impact on the occupant and protect the occupant. Further, since the standing part 2c and the leg part 2b in the bumper body are formed by bending one pipe, the number of parts is small, and the standing part 2c and the leg part 2b are compared with the case where each part is a separate part. The rigidity between them can be increased. Furthermore, since the volume of the upright part 2c is small, weight reduction can also be achieved.

Next, a second embodiment of the present invention will be described in detail with reference to FIG.

In the second embodiment of the present invention, the bumper body 2 having the same structure as that of the first embodiment is replaced with the dash panel lean reinforcement 5 in the front bumper for an electric vehicle described in the first embodiment. The front surface is fixed with screws by the fixing portion 2a. At that time, the standing part 2c of the main pipe 2 in the first embodiment is fixed as a hanging part 2e so that the tip is below the leg part 2b and hangs outward. On the other hand, the shock absorbing member 3 is fixed to the front end of the frame ASSY 4 by a fixing portion 3c. In the shock absorbing structure of the vehicle bumper having such a structure, at the time of a collision, the hanging portion receives an impact and the lower end thereof swings toward the receiving portion 3 a of the shock absorbing member 3. When the impact is small, the lower end 2e of the bumper body 2 does not come into contact with the receiving portion 3a of the impact absorbing member 3, and the shock absorption can be provided by the deformation of the bumper body 2 alone. Therefore, the bumper main body 2 can be returned to the original state by human work or mechanical work, and the need for replacement of parts can be reduced.

On the other hand, when the impact is large, the drooping portion 2e of the bumper body 2 that has received the impact swings toward the receiving portion 3a of the impact absorbing member 3 while maintaining the truss structure with the reinforcing pipe 2d as one side. The lower end of the hanging portion 2e contacts the receiving portion 3a of the shock absorbing member 3 and the shock is transmitted to the shock absorbing member 3, and the shock is absorbed by the deformation of the deforming portion 3b of the shock absorbing member 3. Further, if the impact is not sufficiently absorbed even by the deformation of the deformable portion 3b, the impact is further absorbed by crushing the truss structure having the reinforcing pipe 2d of the bumper body 2 as one side. Thereby, the impact at the time of a collision can fully be absorbed and a passenger | crew's safety can be ensured. Also in the second embodiment, the connecting portion with the leg portion 2c in the reinforcing pipe 2d is positioned in the vicinity of the fixed portion 2a, and the upper and lower portions of the reinforcing pipe 2d when the bumper body 2 is viewed from the side. The distance connecting the end connecting portions is equal to the distance when the bumper body is viewed from the side in the height direction center position of the fixed portion 2a of the bumper body 2 and the height position center position of the receiving portion 3a of the shock absorbing member 3 It is desirable that Due to such a structure, the bumper body 2 has a reinforcing pipe centered on any part (impact absorbing part in the claims) between the connecting part of the leg part 2c to the reinforcing pipe 2d and the fixed part 2a at the time of collision. While maintaining the truss structure with 2d as one side, it can swing to the vehicle body side, and the impact can be transmitted to the impact absorbing member 3 by bringing the lower end of the standing portion 2c into contact with the receiving portion 3a of the impact absorbing member 3.

In the present invention described above, when the degree of impact at the time of a vehicle collision is small, the bumper body 2 can be absorbed only by deformation of the bumper body. The need to replace parts can be reduced. On the other hand, when the degree of impact at the time of a vehicle collision is large, the upper end of the raised portion 2c or the lower end of the hanging portion 2e of the bumper body 2 that has received the impact can transmit the impact to the impact absorbing member 3. Shock can be absorbed by deformation. Further, the truss structure with the reinforcing pipe 2d on one side in the bumper body 2 is crushed, so that the impact can be absorbed and the occupant can be protected by a sufficient shock absorbing structure.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and for example, the following embodiments are also conceivable.

For example, in the embodiment of the present invention, the case where it is adopted as a vehicle front bumper has been described. However, the present invention is not limited to the front bumper but may be used for a rear bumper and a side bumper.

In the embodiment of the present invention, the case where the vehicular bumper according to the present invention is employed in a small electric vehicle for single passenger is described, but it may be used in a normal passenger car. In the case where the present invention is adopted for a non-compact passenger car, the width of the bumper becomes large, and the support of the raised portion 2c or the hanging portion 2e by the leg portion 2b of the bumper body 2 may be insufficient. Therefore, a structure in which a large number of leg portions 2b or a plurality of shock absorbing structures for a vehicle bumper according to the present invention are arranged in parallel is desirable.

Next, the bumper body 2 according to the present invention forms a leg portion 2b and an upright portion 2c or a hanging portion 2e by bending one pipe-shaped metal, and bending another single pipe. The reinforcing pipe 2d is formed. However, the bumper body 2 in the present invention may be configured by further combining a plurality of members. For example, it is conceivable to join a flat metal plate or a hard resin as the upright portion 2c or the hanging portion 2e to the front end of the leg portion 2b extending linearly outward from the vehicle.

In addition, as shown in FIG. 7, the standing part 2 c, the leg part 2 b, and the reinforcing pipe 2 d that support both ends of the bumper body are formed of metal pipes, and the two members are joined with a flat hard resin 2 f, It is also possible to bear a part of the standing part 2c. In this case, weight reduction can be achieved by making the flat hard resin 2f lighter than the metal pipe. However, the rigidity of the flat hard resin 2 f needs to be higher than the rigidity of the deformable portion 3 b in the shock absorbing member 3. This is because if the flat hard resin 2f is deformed before the impact absorbing member at the time of collision, it is difficult to transmit the impact to the impact absorbing member. In such a case, the contact between the receiving portion 3a and the upright portion 2c of the shock absorbing member 3 at the time of collision need not be the tip of the upright portion 2c. That is, by setting the fixed height position of the shock absorbing member 3 to the vehicle body to be lower than in the case of the present embodiment, the flat plate portion that is not the tip portion of the flat plate-like hard resin 2f but the intermediate portion in the height direction. It is conceivable to transmit a shock by bringing the shock absorbing member into contact with the shock absorbing member. However, as described in the present embodiment, it is easier to predict the contact position and angle with the shock absorbing member 3 at the time of impact when the portion that contacts the shock absorbing member 3 at the time of collision is the tip of the upright portion 2c. It is more preferable that there is no need to enlarge the receiving part 3a.

Next, the reinforcing pipe 2d in the present embodiment corresponding to the reinforcing portion of the claims of the present invention is formed of a metal pipe that connects the leg portion 2b and the upright portion 2c or the hanging portion 2e, but is not necessarily pipe-shaped. For example, as shown in FIG. 8, a triangular plate is used, and one vertex of the plate is positioned on the outer side of the vehicle body of the leg 2b and at the lower end of the standing part 2c. It is also conceivable that the flat reinforcing part 2g closes the space between the leg part 2b and the standing part 2c in the bumper body.

Further, the standing portion 2c or the hanging portion 2e of the bumper body 2 in the embodiment of the present invention stands or hangs outward from the leg portion 2b. However, the upright portion 2c or the hanging portion 2e can be positioned perpendicular to the leg portion 2b. However, as in the present invention, “the standing part in the bumper body is above the leg part and rises outward” or “the hanging part in the bumper body is below the leg part. It is desirable to "hang outward". By receiving the collision load, the rising portion 2c or the hanging portion 2e of the bumper body swings, so that the shock can be absorbed until the rising portion 2b or the hanging portion 2e reaches a vertical position. This is because the shock applied to the occupant can be absorbed as compared with the case where the standing portion 2b or the hanging portion 2e is formed.

Further, in the embodiment of the present invention, the shock absorbing member 3 uses a hollow metal cylinder provided with a notch in the deformed portion. It is also possible to use as a deformation part. In this case, since the hard resin is deformed by a certain degree of impact, it can function as a deforming member without providing a notch as in the case of a metal plate, and the productivity can be improved.

Further, the leg portion in the embodiment of the present invention uses a metal pipe having a constant thickness from one end to the other end. However, the bending position at the time of collision is clarified, and the upper end of the upright portion 2c or the drooping is more reliably performed. In order to bring the lower end of the portion 2c into contact with the shock absorbing member 3, a notch is provided between the connecting portion of the leg portion 2b of the reinforcing pipe 2d and the reinforcing pipe 2d and the fixed portion 2a, or the diameter is reduced. It is conceivable to have a structure in which the rigidity is lowered in advance as compared with the leg portion 2b. In addition, if the fixed portion 2a and the leg portion 2b are configured to be pivotable in advance and normally locked, and the lock is released only when a certain load is applied at the time of the collision, When the impact is mild, it is possible to easily return the bumper body to the original state.

In addition, the bumper main body 2 in the embodiment of the present invention connects the vicinity of the upper end of the upright portion 2c and the upper end of the reinforcing pipe 2d. Or the lower end vicinity of the drooping part 2e and the lower end of the reinforcement pipe part 2d are connected. However, it is also conceivable to connect the tip of the reinforcing pipe 2d to a portion other than the upper end of the upright portion 2c or the lower end of the hanging portion 2e. However, as in the embodiment of the present invention, it is easier to predict the trajectory when the bumper body 2 is deformed and swings when the tip of the upright portion 2c or the hanging portion 2e and the tip of the reinforcing pipe 2d are coupled. Therefore, the design is excellent.

It is a whole perspective view of the bumper main part in the present invention. It is a whole perspective view of the impact-absorbing member in this invention. FIG. 4 is an exploded view of the bumper body and the shock absorbing member assembled to the vehicle body according to the present invention. It is a side view in the state where the shock absorption structure of the bumper for vehicles in the present invention was attached to the body. It is an exploded view of the resin body which covers the impact-absorbing structure of the vehicle bumper according to the present invention. It is a figure equivalent to FIG. 3 in another embodiment in this invention. It is a figure equivalent to FIG. 1 in another embodiment in this invention. It is a figure equivalent to FIG. 1 in another embodiment in this invention. It is the small vehicle carrying the vehicle bumper of this invention. It is a side view of the conventional vehicle bumper.

Explanation of symbols

1 Small electric vehicle for single passenger 2 Bumper body 3 Shock absorbing member 4 Frame assembly
5 Dash panel lean reinforcement 6 Hood panel 7 Bumper cover 8 Front fender LH panel 9 Front fender RH panel

Claims (6)

A shock absorbing structure in a vehicle bumper that is attached to at least one of a front portion, a rear portion, or a side portion of a vehicle and absorbs a shock at the time of a collision composed of a bumper main body and a shock absorbing member, and the bumper main body is substantially horizontal And a plurality of leg portions that are fixed to the vehicle body, a plurality of leg portions that extend from the fixed portion to the outside of the vehicle, and the leg portions that stand upward from the vehicle outer side with respect to the leg portions. And has a reinforcing portion that connects the standing portion and the leg portion to maintain the angle between the standing portion and the leg portion during a vehicle collision until a predetermined load is applied. Further, the leg portion is formed between the connecting portion of the reinforcing portion and the fixed portion, and is deformed with a lower impact force than the portion reinforced by the reinforcing portion to absorb the shock. Having a portion, wherein the impact The collecting member comes into contact with any part of the standing part when the standing part of the bumper body receives an impact at the time of a vehicle collision and the bumper body swings to the vehicle body side due to deformation of the shock absorbing part. An impact absorbing structure for a vehicle bumper, characterized by absorbing the impact. A shock absorbing structure in a vehicle bumper that is attached to at least one of a front portion, a rear portion, or a side portion of a vehicle and absorbs a shock at the time of a collision composed of a bumper main body and a shock absorbing member, and the bumper main body is substantially horizontal And a plurality of leg portions extending from the fixed portion to the outside of the vehicle, and a plurality of leg portions extending downward from the vehicle exterior side to the leg portions. And has a reinforcing portion that maintains the angle between the drooping portion and the leg portion when the vehicle collides until the predetermined load is applied by connecting the drooping portion and the leg portion. Further, the leg portion is deformed with a lower impact force than the portion reinforced between the connecting portion with the reinforcing portion and the fixed portion and reinforced by the reinforcing portion to absorb the shock. Having an absorption site, The absorbing member comes into contact with any part of the hanging part when the hanging part in the bumper body receives an impact at the time of a vehicle collision and the bumper body swings to the vehicle body side due to deformation of the shock absorbing part. An impact absorbing structure for a vehicle bumper, characterized by absorbing the impact. 3. The shock absorbing structure for a vehicle bumper according to claim 1 or 2, wherein the reinforcing portion is a long one that connects the standing portion or hanging portion and the leg portion, and the standing portion or hanging portion. A shock-absorbing structure in a vehicle bumper, characterized in that a truss structure is formed with the side of the first leg as one side. 4. The shock absorbing structure for a vehicle bumper according to claim 3, wherein the connection between the leg portion and the reinforcing portion in the bumper body is in the vicinity of the fixed portion, and the standing portion or hanging portion in the bumper body is connected to the reinforcing portion. Is to connect the vicinity of the upper end of the reinforcing part to the vicinity of the upper end of the standing part or to connect the vicinity of the lower end of the reinforcing part to the vicinity of the lower end of the hanging part. An impact absorbing structure for a vehicle bumper, wherein the bumper body swings toward the vehicle body, and the upper end of the standing part or the lower end of the hanging part comes into contact with the impact absorbing member to absorb the impact. 5. The shock absorbing structure for a vehicle bumper according to claim 1, wherein the reinforcing portion of the bumper body is formed by bending a single pipe-shaped metal, and is formed of a pipe-shaped metal. A shock absorbing structure for a vehicle bumper, wherein a central portion is connected to the upright portion or the hanging portion and both ends are connected to the leg portion. 6. The impact absorbing structure for a bumper for a vehicle according to claim 1, wherein the impact absorbing member is a standing portion or a hanging portion when the standing portion or hanging portion of the bumper body swings toward the vehicle body during a vehicle collision. A receiving portion having a contact surface in contact with a deformation portion, a deformation portion that absorbs an impact by deformation, and a fixing portion for fixing to a vehicle body, wherein the receiving portion is at least one of an upper end portion or a lower end portion A shock-absorbing structure in a vehicle bumper characterized by being bent outward from the vehicle.