JP7428063B2 - Vehicle rear body structure - Google Patents

Description

The present invention relates to a rear body structure of a vehicle in which a rear bumper beam is provided with a nut member into which a hook member for towing and/or tie-down is screwed, for example.

BACKGROUND ART Recently, in vehicles such as automobiles, hook members to which tow ropes used to tow the vehicle and tie-down belts used to secure the vehicle to a ship's body are attached are configured to be detachable from the vehicle body. For this reason, the vehicle is equipped with a nut member on the vehicle body into which such a hook member is screwed.

For example, Patent Document 1 discloses that a bumper beam (bumper reinforcement), which is a closed cross-section member extending in the vehicle width direction, is inserted into a hole provided in the front wall and a hole provided in the rear wall. A nut member is disclosed that is joined to the rear wall.

By the way, for example, in the case of a bumper beam that is disposed at the rear of the vehicle and has an open cross-sectional shape and does not have a front wall portion, the nut member cannot be supported with the configuration as disclosed in Patent Document 1. For this reason, in the case of a bumper beam having an open cross-section, the supporting rigidity of the nut member is insufficient.

Therefore, it is conceivable to join the front end of the nut member to, for example, a member constituting the vehicle body, but in this case, there is a possibility that the total length of the nut member becomes extremely long compared to the total length of the shaft portion of the hook member. For this reason, there was a fear that the nut member would become larger and become a factor in the increase in weight.

Further, generally, bumper beams are often provided removably with respect to the vehicle body. In this case, for example, it is necessary to removably fasten the nut member to a member constituting the vehicle body, which may complicate the mounting structure of the nut member.

Japanese Patent Application Publication No. 2006-36158

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a rear vehicle body structure for a vehicle that can suppress the increase in size of a nut member and ensure support rigidity of the nut member.

The present invention relates to a rear body structure for a vehicle, which includes: a pair of left and right rear side frames extending at the rear of the vehicle in the longitudinal direction of the vehicle; and the rear side of the vehicle extending in the width direction of the vehicle and having an open cross-sectional shape with the front of the vehicle open. , a rear bumper beam whose both ends in the vehicle width direction are fastened to the rear ends of the left and right rear side frames; A pair of left and right set plates to be fastened, a substantially cylindrical nut member extending in the longitudinal direction of the vehicle onto which a towing or tie-down hook member is screwed, and a nut member between the set plate and the rear bumper beam. a support member that supports the vicinity of the front end of the rear bumper beam, the rear bumper beam faces the set plate at the rear of the vehicle, and the rear bumper beam is joined to the nut member near the rear end in a state where the hook member can be inserted thereinto. The supporting member faces the rear wall portion of the rear bumper beam and the set plate at a distance in the longitudinal direction of the vehicle, and the nut member is joined near the front end thereof. The intermediate wall portion is integrally formed with a first attachment piece portion for attaching the intermediate wall portion to the set plate, and a second attachment piece portion for attaching the intermediate wall portion to the rear wall portion of the rear bumper beam. Features.

The above-mentioned hook member refers to a hook bolt in which a substantially annular or substantially hook-shaped tip portion is integrally formed on a threaded shaft portion.
According to this invention, the rear body structure of the vehicle can suppress the increase in size of the nut member, and can ensure support rigidity of the nut member.

Specifically, because the vicinity of the front end of the nut member is joined to the intermediate wall portion of the support member, the rear body structure of the vehicle can be moved more rearwardly than when the front end of the nut member is joined to the set plate. can support the nut member. Therefore, the rear body structure of the vehicle can suppress the length of the nut member in the longitudinal direction of the vehicle from becoming extremely long with respect to the shaft portion of the hook member.

Furthermore, since the support member is attached to both the rear bumper beam and the set plate, the support rigidity of the intermediate wall can be improved compared to when the support member is attached to either the rear bumper beam or the set plate. . Therefore, the support member can stably support the front end of the nut member.

Thereby, the rear body structure of the vehicle can suppress the increase in size of the nut member, and can ensure supporting rigidity of the nut member. In addition, since the support member is attached to both the rear bumper beam and the set plate, the rear body structure of the vehicle allows the support member to function as a reinforcing member that reinforces the rear bumper beam.

The present invention also relates to a rear body structure of a vehicle, which includes a pair of left and right rear side frames extending in the longitudinal direction of the vehicle; a rear bumper beam whose both ends in the vehicle width direction are fastened to the rear ends of the left and right rear side frames; and a rear bumper beam which is joined to both ends of the rear bumper beam in the vehicle width direction and connected to the rear ends of the left and right rear side frames A pair of left and right set plates fastened together, a substantially cylindrical nut member extending in the longitudinal direction of the vehicle onto which a towing or tie-down hook member is screwed together, and a nut member between the set plate and the rear bumper beam. a support member that supports the vicinity of the front end of the member, the rear bumper beam facing the set plate at the rear of the vehicle, and joined at the rear end of the nut member in a state where the hook member can be inserted therethrough. The support member faces the rear wall portion of the rear bumper beam and the set plate at a distance in the longitudinal direction of the vehicle, and the nut member is joined near the front end thereof. The intermediate wall portion is integrally formed with an intermediate wall portion, a first attachment piece portion that attaches the intermediate wall portion to the set plate, and a second attachment piece portion that attaches the intermediate wall portion to the rear bumper beam. The first mounting piece is disposed toward the front of the vehicle from approximately the longitudinal center of the vehicle between the set plate and the rear wall portion of the rear bumper beam, and the first mounting piece portion extends from the upper end and the lower end of the intermediate wall portion, respectively. The second mounting piece is composed of a pair of upper and lower parts extending toward the set plate, and the second mounting piece extends in a substantially flat plate shape from both ends of the intermediate wall in the vehicle width direction toward the rear wall of the rear bumper beam. It is characterized by being composed of a pair of left and right.

According to this invention , in the rear body structure of the vehicle, the pair of left and right second mounting pieces can be disposed inside the rear bumper beam so as to separate the internal space of the rear bumper beam extending in the vehicle width direction.

For this reason, the rear body structure of a vehicle is such that when a relatively small collision load is applied, such as when the rear of the vehicle collides with an object at an extremely low relative speed, the rear bumper beam can easily move toward the front of the vehicle. Deformation can be suppressed by the pair of left and right second attachment pieces.

Further, the support member can stably support the intermediate wall portion by the pair of upper and lower first attachment pieces and the pair of left and right second attachment pieces. At this time, since the second mounting piece has a substantially flat plate shape, the support member can support the intermediate wall part more stably by the second mounting piece.
As a result, the rear body structure of the vehicle can suppress deformation of the rear bumper beam due to a relatively small collision load, and can improve supporting rigidity of the nut member.

Further, as an aspect of the present invention, the rear bumper beam includes an upper wall portion extending from an upper end of the rear wall portion toward the front of the vehicle, and a lower wall portion extending from a lower end of the rear wall portion toward the front of the vehicle, and the support member The second attachment piece portion may be joined to the rear wall portion, the upper wall portion, and the lower wall portion of the rear bumper beam.

According to this configuration, in the rear body structure of the vehicle, the second attachment of the support member is used as a node member that separates the internal space of the rear bumper beam surrounded by the rear wall, the upper wall, and the lower wall in the vehicle width direction. You can make one part work.
Therefore, in the rear body structure of the vehicle, the second attachment piece portion of the support member can reliably prevent the rear bumper beam from easily deforming toward the front of the vehicle due to a relatively small collision load.

Further, in the rear body structure of the vehicle, the support rigidity of the intermediate wall can be improved by the second attachment piece joined to the rear wall, the upper wall, and the lower wall of the rear bumper beam.
As a result, the rear body structure of the vehicle can further suppress deformation of the rear bumper beam due to a relatively small collision load, and can further improve the support rigidity of the nut member.

Further, as an aspect of the present invention, the pair of left and right supporting members disposed opposite to the set plate, and the rear wall portion, the upper wall portion, and the lower wall portion of the rear bumper beam are integrally covered. The vehicle may also include a beam reinforcing member extending in the vehicle width direction between the supporting members.

According to this configuration, the rear body structure of the vehicle can reinforce the rear bumper beam through cooperation between the support member functioning as a reinforcing member and the beam reinforcing member. At this time, the rear bumper beam can be reinforced in the rear body structure of the vehicle by the beam reinforcing member having a length in the vehicle width direction that is shorter than the rear bumper beam.

Therefore, the rear body structure of the vehicle can suppress an increase in weight compared to a beam reinforcing member having substantially the same length in the vehicle width direction as the rear bumper beam, and can improve the rigidity of the rear bumper beam that supports the support member.
As a result, the rear body structure of the vehicle can more reliably suppress deformation of the rear bumper beam due to a relatively small collision load, and further improve the support rigidity of the nut member.

Further, as an aspect of the present invention, the rear bumper beam may be formed in a shape in which the length in the longitudinal direction of the vehicle gradually increases from near the end of the beam reinforcing member in the vehicle width direction toward the nut member.

According to this configuration, in the rear body structure of the vehicle, between the nut member and the beam reinforcing member, the cross-sectional area of the rear bumper beam in the longitudinal section along the longitudinal direction of the vehicle is compared to the portion covered by the beam reinforcing member. You can make it bigger.

Furthermore, since the second attachment piece of the support member is joined between the nut member and the beam reinforcement member, the rear bumper beam cooperates with the support member so that the rear bumper beam can Rigidity can be improved.

Therefore, the rear body structure of the vehicle can improve the rigidity of the rear bumper beam that supports the support member.
As a result, the rear body structure of the vehicle can further suppress deformation of the rear bumper beam due to a relatively small collision load, and can more reliably improve the supporting rigidity of the nut member.

Advantageous Effects of Invention According to the present invention, it is possible to provide a rear body structure for a vehicle that can suppress the increase in size of the nut member and ensure support rigidity of the nut member.

FIG. 2 is a rear view showing the appearance of the rear part of the vehicle. FIG. 3 is a bottom view showing essential parts on the right side of the vehicle as viewed from the bottom. FIG. 3 is an external perspective view showing essential parts on the right side of the vehicle as seen from the rear of the vehicle. A sectional view taken along the line AA in FIG. 1. FIG. 3 is an exploded perspective view showing main parts in an exploded state. A sectional view taken along the line BB in FIG. 1. A sectional view taken along the line CC in FIG. 1. FIG. 3 is an external perspective view showing the external appearance of the support member as seen from the rear of the vehicle. FIG. 3 is an external perspective view showing the external appearance of the support member as viewed from the front of the vehicle.

An embodiment of this invention will be described below with reference to the drawings.
The vehicle of this embodiment is a so-called hatchback type vehicle in which the rear part of the vehicle is covered by a back door (also referred to as a lift gate) so that it can be opened and closed, and a hook member for towing and/or tie-down is attached to the rear part of the vehicle. The vehicle is configured to be detachable. The rear body structure of such a vehicle will be explained using FIGS. 1 to 9.

1 shows a rear view of the rear part of the vehicle, FIG. 2 shows a bottom view of the main parts on the right side of the vehicle, FIG. 3 shows an external perspective view of the main parts on the right side of the vehicle, and FIG. 4 shows A in FIG. - A cross-sectional view is shown, and FIG. 5 is an exploded perspective view of main parts in an exploded state.

Furthermore, FIG. 6 shows a sectional view taken along the line BB in FIG. 1, FIG. 7 shows a sectional view taken along the line CC in FIG. 1, and FIG. 8 is an external perspective view of the support member 11 as seen from the rear of the vehicle. FIG. 9 shows an external perspective view of the support member 11 when viewed from the front of the vehicle.
Further, in FIG. 3, the rear bumper beam 5 is shown by a chain double-dashed line for clarity of illustration.

In addition, in the figure, arrow Fr and arrow Rr indicate the front-rear direction, with arrow Fr indicating the front and arrow Rr indicating the rear. Furthermore, the arrow Rh and the arrow Lh indicate the vehicle width direction, the arrow Rh indicates the right direction, and the arrow Lh indicates the left direction. In addition, the upper side of the figure indicates the upper side of the vehicle, and the lower side of the figure indicates the lower side of the vehicle.

As shown in FIG. 1, the rear part of the vehicle 1 includes a pair of left and right rear side frames 2 disposed at a predetermined interval in the vehicle width direction, and a rear end of the rear side frame 2 in the vehicle width direction. The rear end 3 is connected to the rear end 3.
Furthermore, as shown in FIG. 1, the rear portion of the vehicle 1 includes a pair of left and right set plates 4, a rear bumper beam 5, and a beam reinforcing member 6 on the rear surface of the rear end 3.

More specifically, the pair of left and right rear side frames 2 are vehicle body frame members whose cross-sectional shape in a longitudinal section along the vehicle width direction is a closed cross section. It consists of a side frame lower located below.

As shown in FIG. 2, a substantially plate-shaped connection plate 7 having a thickness in the longitudinal direction of the vehicle is joined to the rear end of the rear side frame 2. As shown in FIG. As shown in FIGS. 2 and 3, this connection plate 7 is provided with four stud bolts B that project toward the rear of the vehicle through the rear end 3.
Note that, as shown in FIG. 2, a rear floor panel 8 forming the floor surface of the vehicle interior is disposed between the left and right rear side frames 2.

Further, the rear end 3 serves as a rear wall of a luggage compartment that is coverd in an openable/closable manner by a back door (not shown), and also serves as a lower edge of the opening of the luggage compartment. As shown in FIG. 4, the rear end 3 includes a rear end panel 31 connected to the rear end of the rear side frame 2, and a rear end cross member 32 joined to the front surface of the rear end panel 31.

Specifically, as shown in FIG. 4, the rear end panel 31 includes a substantially flat end panel lower portion 31a having a thickness in the vehicle longitudinal direction, and a substantially flat end panel lower portion 31a that extends from the end panel lower portion 31a to the vehicle in a longitudinal section along the vehicle longitudinal direction. It is integrally formed with an end panel upper part 31b extending upward and having a substantially hat-shaped cross section.

As shown in FIG. 4, the end panel upper part 31b is formed into a substantially hat-shaped cross section that protrudes toward the rear of the vehicle.
On the other hand, as shown in FIG. 4, the rear end cross member 32 has a substantially hat-shaped cross-sectional shape in a longitudinal section along the longitudinal direction of the vehicle, and extends toward the front of the vehicle. It is joined from the front side of the vehicle.

As shown in FIG. 4, the rear end 3 forms a closed cross section extending in the vehicle width direction with the end panel upper part 31b of the rear end panel 31 and the rear end cross member 32, so that This constitutes a vehicle body frame that extends in the vehicle width direction.

Further, as shown in FIGS. 1 to 3, the pair of left and right set plates 4 are arranged to face the connecting plate 7 of the rear side frame 2 with the rear end 3 in between, and are fastened to the connecting plate 7 with the rear end 3 in between. Fixed. As shown in FIG. 5, the set plate 4 has a substantially rectangular annular shape when viewed from the rear with a substantially rectangular opening in the center, and is formed in an uneven shape in the longitudinal direction of the vehicle.

Specifically, as shown in FIG. 5, the set plate 4 includes four corner portions 41 located at the four corners, a pair of upper and lower joined portions 42 that connect the corner portions 41 in the vehicle width direction, and a corner portion 41. It is integrally formed with a connecting portion 43 that connects the upper and lower sides of the vehicle in the vertical direction of the vehicle.

As shown in FIG. 5, the corner portion 41 is formed into a flat plate that is substantially rectangular in rear view and comes into contact with the rear surface of the rear end 3. As shown in FIG. 5, this corner portion 41 is formed with an insertion hole 41a through which the stud bolt B of the connecting plate 7 can be inserted.

As shown in FIG. 5, the joined portion 42 is located at the rear of the vehicle with respect to the corner portion 41, and is formed into a substantially rectangular flat plate that is long in the vehicle width direction when viewed from the rear. As shown in FIG. 5, this joined part 42 is formed as a part to which a supporting member 11, which will be described later, is joined.
As shown in FIG. 5, the connecting portion 43 is located at the rear of the vehicle with respect to the corner portion 41, and is formed into a substantially rectangular flat plate in the rear view that is long in the vertical direction of the vehicle.

Further, as shown in FIGS. 1 to 3, the rear bumper beam 5 is a shock absorbing member that extends in the vehicle width direction so as to connect the left and right rear side frames 2 on the rear side of the rear end 3 of the vehicle. As shown in FIG. 3, this rear bumper beam 5 is fastened and fixed to stud bolts B at both ends in the vehicle width direction via a set plate 4.
Further, as shown in FIG. 2, the rear bumper beam 5 is formed into a substantially circular arc shape when viewed from the bottom, with the substantially center in the vehicle width direction protruding toward the rear of the vehicle relative to both ends in the vehicle width direction. There is.

As shown in FIGS. 4 and 6, the rear bumper beam 5 has a cross-sectional shape in a longitudinal section taken along the longitudinal direction of the vehicle, and has a substantially hat-shaped cross-section projecting toward the rear of the vehicle. In other words, the rear bumper beam 5 is a shock absorbing member having an open cross-sectional shape in a longitudinal section along the longitudinal direction of the vehicle, with the front end of the vehicle open.

Specifically, as shown in FIG. 2, the rear bumper beam 5 has a longer length in the longitudinal direction of the vehicle in the outer part in the vehicle width direction than the part covered by the beam reinforcing member 6, which will be described later, when viewed from the bottom. formed into a shape. The rear bumper beam 5 is formed so that its length in the longitudinal direction of the vehicle gradually increases from approximately the same position in the vehicle width direction to the outer side in the vehicle width direction near the end of the beam reinforcing member 6 in the vehicle width direction when viewed from the bottom. has been done.

As shown in FIGS. 4 and 6, this rear bumper beam 5 has a rear wall portion 51, a lower wall portion 52, a lower flange portion 53, an upper wall portion 54, and an upper flange portion 55. The cross-sectional shape in the longitudinal section is formed into a substantially hat-shaped cross section that projects toward the rear of the vehicle.

As shown in FIGS. 4 and 6, the rear wall portion 51 is a substantially plate that faces the end panel lower part 31a of the rear end 3 at a predetermined distance behind the vehicle in a longitudinal section along the longitudinal direction of the vehicle. It is formed in the shape of

Furthermore, as shown in FIGS. 4 and 7, the rear wall portion 51 has an insertion hole through which a nut member 10 (to be described later) can be inserted, at approximately the same position in the vehicle width direction and at the same position in the vehicle vertical direction as in the rear side frame 2. 51a is formed as an opening.

As shown in FIGS. 4 and 6, the lower wall portion 52 extends from the lower end of the rear wall portion 51 toward the front of the vehicle and slightly downward of the vehicle in a longitudinal section along the longitudinal direction of the vehicle, and has a tip thereof. It is formed in a substantially plate shape close to the rear surface of the rear end 3. As shown in FIG. 2, the lower wall portion 52 has a portion on the outside in the vehicle width direction with respect to the portion covered by the beam reinforcing member 6, and is elongated in the longitudinal direction of the vehicle.

As shown in FIGS. 4 and 6, the lower flange portion 53 is formed in a substantially plate shape extending from the front end of the lower wall portion 52 toward the lower side of the vehicle in a longitudinal section along the longitudinal direction of the vehicle. As shown in FIG. 1, the lower flange portion 53 includes a pair of left and right wide portions 53a that are long in the vertical direction of the vehicle, and a pair of wide portions 53a that are shorter in the vertical direction of the vehicle than the wide portions 53a, and It is composed of a narrow portion 53b connecting left and right wide portions 53a.

More specifically, as shown in FIG. 1, the wide portion 53a is formed at the inner edge of the set plate 4 in the vehicle width direction in a range from approximately the same position in the vehicle width direction to the outer side in the vehicle width direction. There is. As shown in FIGS. 2 and 4, the wide portion 53a is formed into an uneven shape that can come into contact with the corner 41 of the set plate 4 on the lower side of the vehicle and the welded portion 42.

Further, the wide portion 53a has two insertion holes (not shown) through which the stud bolts B can be inserted, spaced apart from each other by a predetermined distance in the vehicle width direction.
Note that a portion of the wide portion 53a between the insertion holes is joined to the to-be-joined portion 42 of the set plate 4 via a lower attachment piece portion 113 of the support member 11, which will be described later.

On the other hand, as shown in FIG. 1, the narrow portion 53b is formed in the range between the left and right set plates 4 when viewed from the rear. As shown in FIG. 6, the narrow portion 53b is formed at a position spaced apart from the rear surface of the rear end panel 31 toward the rear of the vehicle.

As shown in FIGS. 4 and 6, the upper wall portion 54 extends from the upper end of the rear wall portion 51 toward the front of the vehicle and slightly upward of the vehicle in a longitudinal section along the longitudinal direction of the vehicle, and has a tip thereof. It is formed in a substantially plate shape close to the rear surface of the rear end 3. As shown in FIG. 2, this upper wall portion 54 has a portion outward in the vehicle width direction with respect to the portion covered by the beam reinforcing member 6, and is formed to have a long shape in the longitudinal direction of the vehicle.

As shown in FIGS. 4 and 6, the upper flange portion 55 is formed into a substantially plate-like shape extending upward from the front end of the upper wall portion 54 in the longitudinal section along the vehicle longitudinal direction. As shown in FIG. 1, the upper flange portion 55 includes a pair of left and right wide portions 55a that are long in the vehicle vertical direction when viewed from the rear, and a pair of left and right wide portions 55a that are shorter in the vehicle vertical direction than the wide portions 55a, and and a narrow portion 55b connecting the wide portion 55a.

More specifically, as shown in FIG. 1, the wide portion 55a is formed at the inner edge of the set plate 4 in the vehicle width direction in a range from approximately the same position in the vehicle width direction to the outer side in the vehicle width direction. There is. As shown in FIGS. 2 and 4, the wide portion 55a is formed into an uneven shape that can come into contact with the corner 41 of the set plate 4 on the lower side of the vehicle and the welded portion 42.

Furthermore, the wide portion 55a has two insertion holes (not shown) through which the stud bolts B can be inserted, spaced apart from each other by a predetermined distance in the vehicle width direction.
Note that a portion of the wide portion 55a between the insertion holes is joined to the to-be-joined portion 42 of the set plate 4 via an upper attachment piece 112 of the support member 11, which will be described later.

On the other hand, as shown in FIG. 1, the narrow portion 55b is formed in the range between the left and right set plates 4 when viewed from the rear. As shown in FIG. 6, the narrow portion 55b is formed at a position spaced apart from the rear surface of the rear end panel 31 toward the rear of the vehicle.

In such a rear bumper beam 5, a wide portion 53a of the lower flange portion 53 and a wide portion 55a of the upper flange portion 55 are joined to the joined portion 42 of the set plate 4 via the support member 11, which will be described later. At the same time, it is fastened to the stud bolt B via the set plate 4.

Further, as shown in FIGS. 1 to 3, the beam reinforcing member 6 is a reinforcing member that reinforces the rear bumper beam 5, and is disposed in a range inward in the vehicle width direction from the left and right set plates 4. More specifically, the beam reinforcing member 6 is disposed at a portion of the rear bumper beam 5 that is shorter in length in the longitudinal direction of the vehicle when viewed from the bottom.

Specifically, as shown in FIG. 6, the beam reinforcing member 6 has a rear surface portion 61, an upper surface portion 62, and a lower surface portion 63, each of which has a cross-sectional shape in a longitudinal section along the longitudinal direction of the vehicle such that the front of the vehicle is open. It is formed into a substantially U-shaped cross section.

As shown in FIG. 6, the rear surface portion 61 is formed into a substantially plate-like shape that faces the rear wall portion 51 of the rear bumper beam 5 slightly toward the rear of the vehicle in a longitudinal section along the longitudinal direction of the vehicle. Further, as shown in FIG. 6, the rear surface portion 61 is formed in a cross-sectional shape in which the vicinity of the upper end and the vicinity of the lower end bulge toward the rear of the vehicle in a longitudinal section along the longitudinal direction of the vehicle.

As shown in FIG. 6, the upper surface portion 62 extends from the upper end of the rear surface portion 61 toward the front and upper side of the vehicle, and extends to the rear portion of the upper wall portion 54 of the rear bumper beam 5 in a longitudinal section along the longitudinal direction of the vehicle. It is formed into a substantially flat plate shape having a length in the front-rear direction. This upper surface portion 62 is joined to the upper surface of the upper wall portion 54 of the rear bumper beam 5, as shown in FIG.

As shown in FIG. 6, the lower surface portion 63 extends from the lower end of the rear surface portion 61 toward the lower front of the vehicle and reaches the rear portion of the lower wall portion 52 of the rear bumper beam 5 in a longitudinal section along the longitudinal direction of the vehicle. It is formed into a substantially flat plate shape having a length in the front-rear direction. This lower surface portion 63 is joined to the lower surface of the lower wall portion 52 of the rear bumper beam 5, as shown in FIG.

As shown in FIGS. 1 and 2, a hook member 9 for towing and/or tie-down is detachably provided at the rear of the vehicle 1 having such a structure. Specifically, as shown in FIG. 1, FIG. 3, and FIG. A support member 11 is provided.

More specifically, as shown in FIG. 7, the hook member 9 includes a tip portion 9a that is approximately annular in plan view, to which a towing rope or tie-down belt is attached, and a substantially cylindrical shaft that extends from the tip portion 9a toward the front of the vehicle. 9b. Note that it is assumed that the shaft portion 9b of the hook member 9 is formed with a thread.

Further, as shown in FIGS. 5 and 7, the nut member 10 is formed into a substantially cylindrical cylindrical body that extends in the longitudinal direction of the vehicle and has an inner circumferential surface into which the shaft portion 9b of the hook member 9 is screwed. ing. As shown in FIGS. 4 and 7, the nut member 10 is arranged so that the distance between the rear wall 51 of the rear bumper beam 5 and the support member 11 (an intermediate wall 111 of the support member 11 to be described later) in the longitudinal direction of the vehicle is smaller than the distance between the rear wall 51 of the rear bumper beam 5 and the support member 11 (an intermediate wall 111 of the support member 11 to be described later). It is formed with a long length in the longitudinal direction of the vehicle.

Further, the support member 11 is a member that supports the vicinity of the rear end of the nut member 10 between the set plate 4 and the rear bumper beam 5, as shown in FIGS. 3 to 5.
As shown in FIGS. 4, 5, and 7, this support member 11 includes a substantially flat intermediate wall portion 111 having a thickness in the longitudinal direction of the vehicle, and an upper mounting piece portion 112 extending from the intermediate wall portion 111. , a lower attachment piece 113, an inner attachment piece 114, and an outer attachment piece 115.

Note that, as shown in FIGS. 1 and 2, the support member 11 is formed in a shape having substantially the same length in the vehicle width direction as the set plate 4.
Specifically, as shown in FIGS. 4 and 7, the intermediate wall portion 111 is located at a position slightly rearward of the vehicle from approximately the center in the longitudinal direction of the vehicle between the set plate 4 and the rear wall portion 51 of the rear bumper beam 5. , it is arranged so as to face the set plate 4 and the rear wall portion 51 of the rear bumper beam 5 with a gap therebetween.

As shown in FIGS. 4 and 7, the intermediate wall portion 111 is a generally rectangular flat plate in a rear view having a length in the vehicle width direction and a length in the vehicle vertical direction that is smaller than the generally rectangular opening in the rear view in the set plate 4. It is formed in the shape of
Furthermore, as shown in FIGS. 7 to 9, the intermediate wall portion 111 has an insertion hole 11a formed in a portion facing the insertion hole 51a of the rear bumper beam 5, into which the nut member 10 can be inserted.

As shown in FIGS. 4 and 5, the upper mounting piece 112 and the lower mounting piece 113 are a pair of upper and lower mounting pieces extending from the upper and lower ends of the intermediate wall 111, and are attached to the rear bumper beam. 5 and is joined to the joined portion 42 of the set plate 4.

As shown in FIGS. 8 and 9, the upper mounting piece 112 and the lower mounting piece 113 extend from the upper and lower ends of the intermediate wall 111 toward the front of the vehicle, that is, toward the set plate 4. has been done.

More specifically, as shown in FIGS. 8 and 9, the upper mounting piece 112 is formed in a shape that extends from the upper end of the intermediate wall 111 toward the front of the vehicle, and then extends upward from the vehicle. At the boundary between the upper attachment piece 112 and the intermediate wall 111, two beads 11b are formed at a predetermined interval in the vehicle width direction and are recessed toward the front and lower side of the vehicle.

Further, as shown in FIGS. 8 and 9, the lower mounting piece portion 113 is formed in a shape that extends from the lower end of the intermediate wall portion 111 toward the front of the vehicle, and then extends downward from the vehicle. At the boundary between the lower attachment piece 113 and the intermediate wall 111, two beads 11c are formed at a predetermined interval in the vehicle width direction and are recessed toward the front and upper side of the vehicle.

The inner mounting piece 114 and the outer mounting piece 115 are a pair of left and right mounting pieces extending from the edge of the intermediate wall 111 in the vehicle width direction, as shown in FIGS. 2 and 7. The rear bumper beam 5 is joined to a rear wall portion 51, an upper wall portion 54, and a lower wall portion 52 of the rear bumper beam 5.

As shown in FIGS. 8 and 9, the inner attachment piece 114 and the outer attachment piece 115 are connected to the rear side of the vehicle from the edge of the intermediate wall 111 in the vehicle width direction, that is, behind the rear bumper beam 5. It extends toward the wall portion 51.

Specifically, as shown in FIGS. 7 to 9, the inner mounting piece 114 includes a side wall portion 114a extending from the inner edge in the vehicle width direction of the intermediate wall portion 111, a first flange portion 114b, and a first flange portion 114b. It is composed of a second flange portion 114c and a third flange portion 114d.

As shown in FIGS. 7 to 9, the side wall portion 114a is formed into a substantially flat plate shape extending toward the front of the vehicle and slightly inward in the vehicle width direction from the edge of the intermediate wall portion 111. This side wall portion 114a is formed in such a shape as to separate the interior space of the rear bumper beam 5 extending in the vehicle width direction from each other in the vehicle width direction.

As shown in FIGS. 7 to 9, the first flange portion 114b extends inward in the vehicle width direction from the rear end of the side wall portion 114a. This first flange portion 114b is joined to the front surface of the rear wall portion 51 of the rear bumper beam 5, as shown in FIG.

As shown in FIGS. 8 and 9, the second flange portion 114c extends inward in the vehicle width direction from the upper end of the side wall portion 114a. This second flange portion 114c is joined to the lower surface of the upper wall portion 54 of the rear bumper beam 5, as shown in FIG.

As shown in FIGS. 8 and 9, the third flange portion 114d extends inward in the vehicle width direction from the lower end of the side wall portion 114a. This third flange portion 114d is joined to the upper surface of the lower wall portion 52 of the rear bumper beam 5, as shown in FIG.

Further, as shown in FIGS. 7 to 9, the outer attachment piece 115 includes a side wall portion 115a, a first flange portion 115b, and a second flange extending from the outer edge of the intermediate wall portion 111 in the vehicle width direction. It is composed of a portion 115c and a third flange portion 115d.

As shown in FIGS. 7 to 9, the side wall portion 115a is formed into a substantially flat plate shape extending from the edge of the intermediate wall portion 111 toward the front of the vehicle and slightly outward in the vehicle width direction. This side wall portion 115a is formed in a shape so as to separate the interior space of the rear bumper beam 5 extending in the vehicle width direction from each other in the vehicle width direction.

As shown in FIGS. 7 to 9, the first flange portion 115b extends outward in the vehicle width direction from the rear end of the side wall portion 115a. This first flange portion 115b is joined to the front surface of the rear wall portion 51 of the rear bumper beam 5, as shown in FIG.

As shown in FIGS. 8 and 9, the second flange portion 115c extends outward in the vehicle width direction from the upper end of the side wall portion 115a. This second flange portion 115c is joined to the lower surface of the upper wall portion 54 of the rear bumper beam 5, as shown in FIG.

As shown in FIGS. 8 and 9, the third flange portion 115d extends outward in the vehicle width direction from the lower end of the side wall portion 115a. This third flange portion 115d is joined to the upper surface of the lower wall portion 52 of the rear bumper beam 5, as shown in FIG.

At the rear of the vehicle 1 having such a configuration, the nut member 10 is inserted into the insertion hole 51a of the rear bumper beam 5 near the rear end, and into the insertion hole 111a of the support member 11 near the front end, as shown in FIG. It is inserted. Furthermore, the nut member 10 is supported by the vehicle body by being joined to the rear wall portion 51 of the rear bumper beam 5 near the rear end and to the intermediate wall portion 111 of the support member 11 near the front end.

As described above, the rear body structure of the vehicle 1 includes a pair of left and right rear side frames 2 extending at the rear of the vehicle in the longitudinal direction of the vehicle, and an open cross-sectional shape with the rear of the vehicle extending in the width direction of the vehicle and opening at the front of the vehicle. , and a rear bumper beam 5 whose both ends in the vehicle width direction are fastened to the rear ends of the left and right rear side frames 2.

Further, the rear body structure of the vehicle 1 includes a pair of left and right set plates 4 that are respectively joined to both ends of the rear bumper beam 5 in the vehicle width direction and fastened together with the rear bumper beam 5 to the rear ends of the left and right rear side frames 2. There is.

Furthermore, the rear body structure of the vehicle 1 includes a substantially cylindrical nut member 10 extending in the longitudinal direction of the vehicle into which a hook member 9 for towing or tie-down is screwed together, a set plate 4, and a rear bumper beam 5. A support member 11 that supports the vicinity of the front end of the nut member 10 is provided.

The rear bumper beam 5 faces the set plate 4 at the rear of the vehicle and includes a rear wall portion 51 to which a nut member 10 near the rear end is joined so that a hook member 9 can be inserted therethrough. .

Further, the support member 11 faces the rear wall portion 51 of the rear bumper beam 5 and the set plate 4 at a distance in the longitudinal direction of the vehicle, and also has an intermediate wall portion 111 to which the vicinity of the front end of the nut member 10 is joined. We are prepared.

In addition, the support member 11 connects the intermediate wall portion 111 to the first mounting piece portion (upper mounting piece portion 112, lower attachment portion 113) that is joined to the set plate 4, and the intermediate wall portion 111 to the rear bumper beam 5. The second attachment piece portions (inner attachment piece portion 114, outer attachment piece portion 115) are integrally formed.

According to this invention, the rear body structure of the vehicle 1 can suppress the increase in size of the nut member 10, and can ensure support rigidity of the nut member 10.

Specifically, the vicinity of the front end of the nut member 10 is joined to the intermediate wall portion 111 of the support member 11, so that the rear body structure of the vehicle 1 is changed, for example, when the front end of the nut member 10 is joined to the set plate 4. Compared to this, the nut member 10 can be supported at the rear of the vehicle. Therefore, the rear body structure of the vehicle 1 can prevent the length of the nut member 10 in the longitudinal direction of the vehicle from becoming extremely long with respect to the shaft portion 9b of the hook member 9.

Furthermore, since the support member 11 is joined to both the rear bumper beam 5 and the set plate 4, the support member 11 supports the intermediate wall portion 111 more than when it is joined to either the rear bumper beam 5 or the set plate 4. Rigidity can be improved. Therefore, the support member 11 can stably support the front end of the nut member 10.

Thereby, the rear body structure of the vehicle 1 can suppress the increase in size of the nut member 10, and can ensure supporting rigidity of the nut member 10. In addition, since the support member 11 is joined to both the rear bumper beam 5 and the set plate 4, the rear body structure of the vehicle 1 allows the support member 11 to function as a reinforcing member that reinforces the rear bumper beam 5. can.

Further, the intermediate wall portion 111 is disposed on the front side of the vehicle from approximately the center of the vehicle front and rear between the set plate 4 and the rear wall portion 51 of the rear bumper beam 5. Furthermore, the first mounting piece portions (upper mounting piece portion 112 and lower mounting piece portion 113) are configured as a pair of upper and lower pieces extending from the upper end and the lower end of the intermediate wall portion 111 toward the set plate 4, respectively. It is. The second mounting pieces (the inner mounting piece 114 and the outer mounting piece 115) extend in a substantially flat plate shape from both ends of the intermediate wall 111 in the vehicle width direction toward the rear wall 51 of the rear bumper beam 5, respectively. It consists of an extended left and right pair.

According to this configuration, the rear body structure of the vehicle 1 has a pair of left and right second mounting pieces (inner mounting pieces) inside the rear bumper beam 5 so as to separate the internal space of the rear bumper beam 5 extending in the vehicle width direction. 114 and an outer attachment piece 115).

Therefore, in the rear body structure of the vehicle 1, when a relatively small collision load is applied, for example, when the rear of the vehicle collides with an object at an extremely low relative speed, the rear bumper beam 5 moves toward the front of the vehicle. Easy deformation can be suppressed by the pair of left and right second attachment pieces (inner attachment piece 114, outer attachment piece 115).

Further, the support member 11 includes a pair of upper and lower first mounting pieces (upper mounting piece 112, lower mounting piece 113), and a pair of left and right second mounting pieces (inner mounting piece 114, outer mounting piece 115), it is possible to stably support the intermediate wall portion 111. At this time, since the second mounting piece part (inner mounting piece part 114, outer mounting piece part 115) is made into a substantially flat plate shape, the supporting member 11 , the outer attachment piece 115) allows the intermediate wall 111 to be supported more stably.
Thereby, the rear body structure of the vehicle 1 can suppress deformation of the rear bumper beam 5 due to a relatively small collision load, and can improve the supporting rigidity of the nut member 10.

Further, the rear bumper beam 5 includes an upper wall portion 54 extending from the upper end of the rear wall portion 51 toward the front of the vehicle, and a lower wall portion 52 extending from the lower end of the rear wall portion 51 toward the front of the vehicle. The second attachment piece portions (the inner attachment piece portion 114 and the outer attachment piece portion 115) of the support member 11 are joined to the rear wall portion 51, the upper wall portion 54, and the lower wall portion 52 of the rear bumper beam 5. It is something that

According to this configuration, the rear body structure of the vehicle 1 is supported as a node member that separates the internal space of the rear bumper beam 5 surrounded by the rear wall portion 51, the upper wall portion 54, and the lower wall portion 52 in the vehicle width direction. The second attachment piece portions (inner attachment piece portion 114, outer attachment piece portion 115) of the member 11 can be made to function.
Therefore, the rear body structure of the vehicle 1 prevents the rear bumper beam 5 from easily deforming toward the front of the vehicle due to a relatively small collision load. This can be reliably suppressed by the mounting piece 115).

Furthermore, the rear body structure of the vehicle 1 includes second mounting pieces (an inner mounting piece 114, an outer mounting piece 114, an outer mounting piece 115), the support rigidity of the intermediate wall portion 111 can be improved.
Thereby, the rear body structure of the vehicle 1 can further suppress deformation of the rear bumper beam 5 due to a relatively small collision load, and can further improve the support rigidity of the nut member 10.

Further, the rear body structure of the vehicle 1 includes a pair of left and right support members 11 disposed opposite to the set plate 4, and a rear wall portion 51, an upper wall portion 54, and a lower wall portion 52 of the rear bumper beam 5. The beam reinforcing member 6 extends between the supporting members 11 in the vehicle width direction.

According to this configuration, the rear body structure of the vehicle 1 can reinforce the rear bumper beam 5 through cooperation between the support member 11 functioning as a reinforcing member and the beam reinforcing member 6. At this time, the rear bumper beam 5 can be reinforced in the rear body structure of the vehicle 1 by the beam reinforcing member 6 whose length in the vehicle width direction is shorter than that of the rear bumper beam 5.

Therefore, in the rear body structure of the vehicle 1, the rigidity of the rear bumper beam 5 that supports the support member 11 can be improved by suppressing an increase in weight compared to a beam reinforcing member having approximately the same length in the vehicle width direction as the rear bumper beam 5. Can be done.
Thereby, the rear body structure of the vehicle 1 can more reliably suppress deformation of the rear bumper beam 5 due to a relatively small collision load, and further improve the support rigidity of the nut member 10.

Further, the rear bumper beam 5 is formed in a shape in which the length in the vehicle longitudinal direction gradually increases from near the end of the beam reinforcing member 6 in the vehicle width direction toward the nut member 10.

According to this configuration, in the rear body structure of the vehicle 1, the cross-sectional area of the rear bumper beam 5 in the longitudinal section along the longitudinal direction of the vehicle is covered by the beam reinforcing member 6 between the nut member 10 and the beam reinforcing member 6. It can be made larger compared to the part that is covered.

Furthermore, since the second attachment piece portion (inner attachment piece portion 114, outer attachment piece portion 115) of the support member 11 is joined between the nut member 10 and the beam reinforcing member 6, the rear bumper beam 5 is By cooperating with the support member 11, the rigidity between the nut member 10 and the beam reinforcing member 6 can be improved.

Therefore, the rear body structure of the vehicle 1 can improve the rigidity of the rear bumper beam 5 that supports the support member 11.
Thereby, the rear body structure of the vehicle 1 can further suppress deformation of the rear bumper beam 5 due to a relatively small collision load, and can more reliably improve the support rigidity of the nut member 10.

In the correspondence between the configuration of this invention and the above-described embodiments,
The first mounting piece portion of the present invention corresponds to the upper mounting piece portion 112 and the lower mounting piece portion 113 of the embodiment,
Similarly below,
The second attachment piece portion corresponds to the inner attachment piece portion 114 and the outer attachment piece portion 115,
This invention is not limited to the configuration of the above-described embodiments, and can be implemented in many other embodiments.

For example, in the above-described embodiment, the hook member 9 is composed of the substantially annular tip portion 9a and the threaded shaft portion 9b, but the hook member 9 is not limited thereto, and the substantially hook-shaped tip portion It may be a hook member having.

In addition, although the vehicle 1 is provided with the nut members 10 at both ends of the rear bumper beam 5 in the vehicle width direction, the present invention is not limited thereto. Alternatively, the vehicle may be provided with the nut member 10 on one side.

In addition, although the rear bumper beam 5 has a cross-sectional shape in a longitudinal section along the longitudinal direction of the vehicle that is substantially hat-shaped in cross-section protruding toward the rear of the vehicle, the present invention is not limited to this, and as long as the cross-sectional shape is open in the front of the vehicle For example, it may be a rear bumper beam having a substantially U-shaped cross section.

Further, although the nut member 10 inserted into the insertion hole 51a of the rear bumper beam 5 is joined to the rear wall portion 51 of the rear bumper beam 5, the present invention is not limited to this. The nut member 10 in this state may be joined to the rear wall portion 51. In this case, the rear wall portion 51 of the rear bumper beam 5 is provided with an insertion hole through which the shaft portion 9b of the hook member 9 can be inserted.

In addition, although the nut member 10 inserted into the insertion hole 111a of the support member 11 is bonded to the intermediate wall portion 111 of the support member 11, the present invention is not limited to this. The nut member 10 in this state may be joined to the intermediate wall portion 111.

1...Vehicle 2...Rear side frame 4...Set plate 5...Rear bumper beam 6...Beam reinforcement member 7...Connection plate 9...Hook member 10...Nut member 11...Support member 51...Rear wall part 52...Lower wall part 54...Upper wall Part 111...Intermediate wall part 112...Upper attachment piece part 113...Lower attachment piece part 114...Inner attachment piece part 115...Outer attachment piece part

Claims (5)

A rear body structure of a vehicle,
A pair of left and right rear side frames extending from the rear of the vehicle in the longitudinal direction of the vehicle;
a rear bumper beam that extends in the vehicle width direction at the rear of the vehicle, is formed in an open cross-sectional shape with an open front end, and has both ends in the vehicle width direction fastened to the rear ends of the left and right rear side frames;
a pair of left and right set plates that are respectively joined to both ends of the rear bumper beam in the vehicle width direction and fastened together with the rear bumper beam to the rear ends of the left and right rear side frames;
a substantially cylindrical nut member extending in the longitudinal direction of the vehicle, into which a hook member for towing or tie-down is screwed;
a support member that supports the vicinity of the front end of the nut member between the set plate and the rear bumper beam;
The rear bumper beam is
a rear wall portion that faces the set plate at the rear of the vehicle and is joined to the vicinity of the rear end of the nut member in a state where the hook member can be inserted therethrough;
The support member is
an intermediate wall portion that faces the rear wall portion of the rear bumper beam and the set plate at a distance in the longitudinal direction of the vehicle, and is joined to a vicinity of the front end of the nut member;
a first attachment piece for attaching the intermediate wall to the set plate;
A rear body structure of a vehicle, in which the intermediate wall portion is integrally formed with a second attachment piece portion for attaching the intermediate wall portion to the rear wall portion of the rear bumper beam. A rear body structure of a vehicle,
A pair of left and right rear side frames extending from the rear of the vehicle in the longitudinal direction of the vehicle;
a rear bumper beam that extends in the vehicle width direction at the rear of the vehicle, is formed in an open cross-sectional shape with an open front end, and has both ends in the vehicle width direction fastened to the rear ends of the left and right rear side frames;
a pair of left and right set plates that are respectively joined to both ends of the rear bumper beam in the vehicle width direction and fastened together with the rear bumper beam to the rear ends of the left and right rear side frames;
a substantially cylindrical nut member extending in the longitudinal direction of the vehicle, into which a hook member for towing or tie-down is screwed;
a support member that supports the vicinity of the front end of the nut member between the set plate and the rear bumper beam;
The rear bumper beam is
a rear wall portion that faces the set plate at the rear of the vehicle and is joined to the vicinity of the rear end of the nut member in a state where the hook member can be inserted therethrough;
The support member is
an intermediate wall portion that faces the rear wall portion of the rear bumper beam and the set plate at a distance in the longitudinal direction of the vehicle, and is joined to a vicinity of the front end of the nut member;
a first attachment piece for attaching the intermediate wall to the set plate;
integrally formed with a second attachment piece for attaching the intermediate wall to the rear bumper beam;
The intermediate wall portion is
disposed on the vehicle front side from approximately the center of the vehicle front and rear between the set plate and the rear wall portion of the rear bumper beam;
The first mounting piece portion is
consisting of a pair of upper and lower ends extending from the upper end and lower end of the intermediate wall toward the set plate, respectively;
The second mounting piece portion is
A pair of left and right beams each extending in a substantially flat plate shape from both ends of the intermediate wall in the vehicle width direction toward the rear wall of the rear bumper beam.
The rear body structure of the vehicle. The rear bumper beam is
an upper wall portion extending toward the front of the vehicle from the upper end of the rear wall portion;
a lower wall portion extending from the lower end of the rear wall portion toward the front of the vehicle;
The second mounting piece portion of the support member is
3. The rear body structure of a vehicle according to claim 1, wherein the rear body structure is joined to the rear wall, the upper wall, and the lower wall of the rear bumper beam. a pair of left and right supporting members arranged opposite to the set plate;
4. The beam reinforcing member according to claim 3, further comprising a beam reinforcing member that integrally covers the rear wall, the upper wall, and the lower wall of the rear bumper beam and extends in the vehicle width direction between the support members. The rear body structure of the vehicle. The rear bumper beam is
5. The rear body structure for a vehicle according to claim 4, wherein the beam reinforcing member is formed in a shape in which the length in the longitudinal direction of the vehicle gradually increases from the vicinity of the end in the vehicle width direction toward the nut member.

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