Body structure

Abstract

The present invention provides a vehicle body structure which does not increase weight or manufacturing cost and has sufficient joint strength against tensile load. The vehicle body structure (S1, S1a, S2, S3, S4) comprises an extension member (EX) clamped between a bumper beam (BB) extending in the vehicle width direction and a side frame extending in the vehicle front-rear direction, and the extension member (EX) is provided with: a fixing plate (10) which is composed of a plate-like member, faces the vehicle front-rear direction and is fixed to the protruding end of the side frame; a crushing body (20) which is arranged on the fixing plate (10); and a connecting belt (30) which is composed of a plate-like member extending in the vehicle front-rear direction and connects the vehicle width direction outer end of the fixing plate (10) and the vehicle width direction outer end of the bumper beam (BB) to form a continuous integral body.

Description

Technical Field

[0001] The invention relates to a vehicle body structure around a bumper beam. Background Art

[0002] Conventionally, a bumper beam mounting member is disposed at a protruding end of a front side frame, and the bumper beam is mounted on the front side frame via the bumper beam mounting member.

[0003] For example, in the vehicle body structure proposed in Patent Document 1, a bumper beam mounting member is constituted by a cylindrical bumper beam extension and a plate-shaped mounting plate, and they are joined by MIG welding.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-99043 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In particular, a T-joint is used at the joint at the outer end in the vehicle width direction, the cylindrical end of the bumper beam extension is brought into contact with the plate surface of the mounting plate, and the contacting portion is MIG welded to form a T-shaped cross section.

[0009] The welding strength of a T-joint tends to be lower than that of an attachment joint or a lap fillet welded joint by MIG welding.

[0010] Therefore, in order to obtain the required welding strength, it is necessary to increase the length of the welding part and the thickness of the plate, which may lead to an increase in weight and cost.

[0011] It is also known that when a load is applied to the center of the bumper beam, a load moving forward is relatively applied to the side ends of the bumper beam. When such a load moving forward is applied, the T-joint portion may be split.

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle body structure having sufficient joint strength against a tensile load without causing an increase in weight or manufacturing cost.

[0013] Means for solving problems

[0014] In order to achieve the aforementioned purpose, the vehicle body structure of the present invention is characterized in that it is provided with an extension member, which is clamped between a bumper beam extending in the vehicle width direction and a side frame extending in the vehicle front-rear direction, and the extension member includes: a fixing plate, which is composed of a plate-like component, faces the vehicle front-rear direction and is fixed to the protruding end of the side frame; a crushing body, which is arranged on the fixing plate; and a connecting belt, which is composed of a plate-like component extending in the vehicle front-rear direction, connects the outer end portion of the fixing plate in the vehicle width direction with the outer end portion of the bumper beam in the vehicle width direction and is continuous as a whole.

[0015] Effects of the Invention

[0016] According to the present invention, it is possible to provide a vehicle body structure having sufficient joint strength against a tensile load without causing an increase in weight or a rise in manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a perspective view showing the vehicle body structure of the first embodiment, as seen from the upper left front.

[0018] Figure 2 It is a perspective view showing the vehicle body structure of the first embodiment, as seen from the upper right rear side.

[0019] Figure 3 It is a perspective view showing the vehicle body structure of the first embodiment, as seen from the upper left rear side.

[0020] Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV.

[0021] Figure 5 It is along Figure 3 A cross-sectional view of line VV.

[0022] Figure 6 is a modification of the first embodiment along Figure 3 Cross-sectional view of the corresponding part along line IV-IV.

[0023] Figure 7 The vehicle body structure of the second embodiment is along the Figure 3 Cross-sectional view of the corresponding part along line IV-IV.

[0024] Figure 8 The vehicle body structure of the third embodiment is along the Figure 3 Cross-sectional view of the corresponding part along line IV-IV.

[0025] Fig. 9 The vehicle body structure of the fourth embodiment is along the Figure 3 Cross-sectional view of the corresponding part along line IV-IV.

[0026] Description of Reference Numerals

[0027] S1, S1a, S2, S3, S4 body structure

[0028] BB Bumper Beam

[0029] EX extensions

[0030] 10 Fixing plate

[0031] 11. Fix the subject

[0032] 11a Working hole

[0033] 13 Fixed side with joint piece

[0034] 20 crushed body

[0035] 21a Crushing reinforcement

[0036] 30 Linking belt

[0037] 31a Connection reinforcement DETAILED DESCRIPTION

[0038] <First embodiment>

[0039] Reference Figure 1 to Figure 5 The vehicle body structure S1 according to the first embodiment of the present invention will be described in detail.

[0040] In addition, in description, the same code|symbol is attached|subjected to the same element, and the overlapping description is abbreviate|omitted.

[0041] In the following description, “vehicle front-rear direction outer side” refers to a direction relatively away from the vehicle cabin, and “vehicle front-rear direction vehicle cabin side” refers to a direction relatively close to the vehicle cabin.

[0042] The vehicle body structure S1 of the present embodiment constitutes a front end portion of a vehicle (not shown) in which a luggage room (not shown) is provided in front of a vehicle cabin (not shown).

[0043] It should be noted that the vehicle cabin is a space located in the center of the vehicle for passengers.

[0044] The luggage room is a space that mainly accommodates equipment such as an engine as a power source, and is the so-called engine room.

[0045] The vehicle body structure S1 of the present embodiment includes a front side frame (not shown), a bumper beam BB and an extension member EX (see Figure 1 , Figure 2 ).

[0046] The front side frames (side frames) are disposed on both sides of the luggage room, are structural members supported by the vehicle interior, and extend in the front-rear direction of the vehicle.

[0047] The front frame is provided with an engine (not shown) and other equipment.

[0048] The bumper beam BB extends in the vehicle width direction, and both ends thereof are supported by the front end portions of the front side frames as protruding ends via extension members EX (see Figure 1 to Figure 4 ).

[0049] The bumper beam BB includes a beam body B1 , a beam flange B2 , and a beam side belt joint piece B3 .

[0050] The cross member body B1 has a rectangular groove shape, and is disposed such that the rectangular groove opens toward the vehicle front (outward in the vehicle front-rear direction) and the groove bottom B4 faces the vehicle rear and extends in the vehicle width direction.

[0051] The beam flange B2 is set as a portion for joining the extension member EX to the bumper beam BB.

[0052] In addition, the beam flange B2 extends from the groove opening edge of the beam body B1 toward the outside of the groove.

[0053] Thus, the bumper beam BB has a substantially hat-shaped cross section due to the beam flange B2 and the beam body B1.

[0054] The beam side belt joint piece B3 is provided as a portion for joining a connecting belt 30 to be described later to the bumper beam BB.

[0055] The beam side belt joint pieces B3 extend in a flat plate shape from both end portions of the bumper beam BB in the vehicle width direction toward the vehicle rear.

[0056] The extension member EX is designed to absorb a load that is not completely absorbed by the bumper (not shown) provided on the bumper beam BB and is absorbed to a degree that does not deform the front side frame (see Figure 1 to Figure 4 ).

[0057] Therefore, the extension EX is joined to the groove bottom B4 of the bumper beam BB, and is replaceably provided on the protruding end of the front side frame using a bolt BLT or the like.

[0058] That is, the extension member EX is sandwiched between the bumper beam BB and the front side frame.

[0059] The extension member EX includes a fixing plate 10 , a crushing body 20 and a connecting belt 30 .

[0060] The fixing plate 10 is composed of a plate-shaped member and is arranged facing the front-rear direction of the vehicle (see Figure 1 to Figure 4 ).

[0061] The fixing plate 10 includes a fixing body 11 , a fixing flange 12 , a fixing side belt joint piece 13 , a wrap-around portion 14 , and a fixing body side belt joint portion 15 .

[0062] The fixing body 11 has a flat plate shape and has a working hole 11 a formed so as to communicate with a cylindrical hole of a crushing body 20 described later.

[0063] The working hole 11 a is set to a hole shape through which an electrode used for spot welding can be inserted.

[0064] The fixing flange 12 is a portion for assembling the extension EX to the protruding end of the front side frame (side frame).

[0065] The fixing flanges 12 are set at the upper edge and the lower edge of the fixing body 11 and are provided with a plurality of bolt insertion holes 12 a.

[0066] The fixing flange 12 is fixed to the front side frame by screwing a bolt BLT or the like that penetrates the bolt insertion hole 12 a into the front end portion (protruding end) of the front side frame.

[0067] The fixed-side belt joint piece 13 is a joint portion for connecting the fixed plate 10 and the connecting belt 30, which are independent members, continuously and integrally.

[0068] The fixed-side belt engaging piece 13 extends forward (outward in the vehicle front-rear direction) from the outer edge portion of the fixed body 11 in the vehicle width direction.

[0069] That is, the fixed-side belt joint piece 13 forms a substantially L-shaped cross section together with the fixed body 11 .

[0070] The amount of the fixed-side belt joint piece 13 extending forward is set to a dimension that allows spot welding.

[0071] The wrap-around portion 14 is set at a position between the fixed body 11 and the fixed side belt joint piece 13, that is, a corner portion of the fixed plate 10 having a substantially L-shaped cross section (see Figure 5 ).

[0072] The wrap-around portion 14 bulges toward the rear of the corner portion and is curved in an arc shape.

[0073] Thus, a gap is formed between the winding portion 14 and the crushed body 20 .

[0074] The fixed body side belt joint 15 is a joint portion of the rear end portion (the end portion on the vehicle interior side in the vehicle longitudinal direction) of the connecting belt 30 and is set on the opposite side (the fixed body 11 side) of the fixed side belt joint piece 13 with the wrap-around portion 14 interposed therebetween.

[0075] The crush body 20 is set to absorb the collision energy by crushing when the bumper beam BB is input with a collision load exceeding a set value to protect the occupants in the vehicle cabin (see Figure 1 to Figure 4 ).

[0076] The crushing body 20 includes a crushing main body 21 , a crushing side flange joint piece 22 , a crushing side beam joint piece 23 and a crushing side belt joint piece 24 .

[0077] The crush body 21 has a plate thickness, a bent shape, and the like set so as to be crushed when a predetermined load is input in the vehicle front-rear direction via the bumper beam BB.

[0078] The crush body 21 is formed by integrally joining a plurality of plate-like members that have been subjected to a bending process.

[0079] In addition, the crushing body 21 and the connecting band 30 are joined together to form a substantially square tube shape.

[0080] Furthermore, the crushing body 21 is disposed on the plate surface of the fixing body 11 facing forward so that a cylindrical hole penetrates in the front-rear direction of the vehicle.

[0081] A crush side beam engaging piece 23 is formed at a front end portion of the crush body 21 , and the crush body 20 is joined to the bumper beam BB via the crush side beam engaging piece 23 .

[0082] The rear end portion of the crush body 21 is MIG-welded in a state of being in contact with the plate surface of the fixed body 11 facing forward.

[0083] That is, the crush body 21 and the fixing plate 10 are joined using a T-joint.

[0084] Furthermore, the crushing body 21 is provided on the fixing plate 10 in a state of being in contact with the plate surface of the fixing-side belt engaging piece 13 facing the inner side in the vehicle width direction.

[0085] The crush body 21 includes a crush rib 21 a.

[0086] The crushing rib 21 a is set to be a portion that becomes a crushing starting point together with a connecting rib 31 a described later when a predetermined load is input in the vehicle front-rear direction.

[0087] The crush reinforcement rib 21 a is composed of depressions and projections formed by press working of the crush body 21 .

[0088] The crush side flange joint piece 22 is set as a portion to be joined (spot welded) to the beam flange B2 of the bumper beam BB, and is formed at the front edge of the crush body 21 .

[0089] The crush-side beam joining piece 23 is set as a portion to be joined (spot-welded) to the groove bottom portion B4 and the groove wall portion B5 of the bumper beam BB.

[0090] The crush side belt joint piece 24 is set as a portion to be joined (spot welded) to the connecting belt 30 , and is formed at the outer edge portion of the crush body 21 in the vehicle width direction.

[0091] When a load (tensile load) in a direction of separation from the fixing plate 10 acts on the bumper beam BB, the connecting band 30 is set as a reinforcing member for preventing the crushing body 21 from being separated from the fixing plate 10 (see Figure 1 to Figure 4 ).

[0092] The connecting belt 30 is formed of a plate-like member, faces in the vehicle width direction, and extends in the vehicle front-rear direction.

[0093] The connecting band 30 constitutes a wall portion of the extension EX on the outer side in the vehicle width direction, and forms a cylindrical shape together with the crush body 21 .

[0094] The connecting belt 30 includes a connecting body 31 , a belt-side cross member joining piece 32 , a belt-side crushing joining piece 33 , a belt-side fixing joining piece 34 , a belt-side fixing body joining piece 35 , and a belt-side winding portion 36 .

[0095] The connection body 31 includes a connection reinforcement rib 31a, which is substantially in the shape of a corrugated plate when viewed from above (see Figure 4 ).

[0096] When a predetermined load is input in the vehicle front-rear direction, the connecting rib 31a is set to be a portion that becomes a crush starting point together with the above-mentioned crushing rib 21a.

[0097] The connection reinforcement rib 31 a is formed by press working the connection body 31 , and is formed so as to protrude and recede in the vehicle width direction and extend in a raised shape in the up-down direction.

[0098] The connection rib 31 a is disposed at the same position as the crush rib 21 a in the vehicle front-rear direction.

[0099] That is, the connecting rib 31 a and the crushing rib 21 a are arranged side by side in the vehicle width direction.

[0100] The belt-side cross member joining piece 32 is set as a portion to be joined (spot-welded) to the cross member-side belt joining piece B3 of the bumper beam BB, and is formed at the front edge portion of the crush body 21 .

[0101] The belt-side crushing joint pieces 33 are set as the parts to be joined (spot-welded) to the crushing-side belt joint pieces 24 of the crushing body 20 , and are formed at the upper edge and the lower edge of the connection body 31 .

[0102] The belt-side fixed joint piece 34 is set as a portion to be joined (spot-welded) to the fixed-side belt joint piece 13 of the fixed plate 10 .

[0103] The belt-side fixing engaging piece 34 extends rearward from the rear edge portion of the connecting body 31 .

[0104] The belt-side fixed body joining piece 35 is set as a portion to be joined (spot-welded) to the fixed body-side belt joining portion 15 of the fixing plate 10 .

[0105] The belt-side fixing main body engaging piece 35 extends and projects inward in the vehicle width direction from the rear edge portion of the belt-side fixing engaging piece 34 .

[0106] The belt-side fixing main body engaging piece 35 forms a substantially L-shape together with the belt-side fixing engaging piece 34 .

[0107] That is, the connection belt 30 is provided with two joining points with respect to the fixing plate 10 .

[0108] The belt side winding portion 36 is set at the corner portion of the substantially L-shaped shape formed by the belt side fixing body engaging piece 35 and the belt side fixing engaging piece 34 (see Figure 5 ).

[0109] The belt-side winding portion 36 is curved in an arc shape following the outer peripheral surface of the winding portion 14 and overlaps with it.

[0110] Next, the assembly procedure of the vehicle body structure S1 of the present embodiment will be described.

[0111] First, the belt-side winding portion 36 of the connecting belt 30 is overlapped with the winding portion 14 of the fixing plate 10 from the outer peripheral side.

[0112] Then, the fixed body side belt joint portion 15 and the belt side fixed body joint piece 35 are spot welded, and the fixed side belt joint piece 13 and the belt side fixed joint piece 34 are spot welded.

[0113] Next, the crush body 20 assembled in advance is placed on the plate surface of the fixing plate 10 facing forward, and is brought into contact with the connecting band 30 from the inner side in the vehicle width direction.

[0114] Then, the crush-side belt joint piece 24 and the belt-side crush-joint piece 33 are spot-welded.

[0115] Furthermore, MIG welding is performed so that the crushed body 20 and the plate surface of the fixing plate 10 facing forward form a T-joint.

[0116] Through the above steps, the assembly of the extension member EX is completed.

[0117] Next, the beam-side belt joint piece B3 of the bumper beam BB is overlapped with the belt-side beam joint piece 32 of the connecting band 30 from the vehicle width direction outer side, and the groove bottom B4 is brought into contact with the front end of the crush body 20 from the vehicle front.

[0118] Then, the beam-side belt joint piece B3 and the belt-side beam joint piece 32 are spot-welded.

[0119] Furthermore, a spot welding electrode is inserted into the working hole 11 a of the fixing plate 10 , and the beam flange B2 and the crush-side beam joint piece 23 are spot welded.

[0120] Through the above steps, the installation of the extension member EX of the bumper beam BB is completed.

[0121] Next, the fixing plate 10 is overlapped with the protruding end of the front side frame and fixed with the bolts BLT.

[0122] Through the above steps, the bumper beam BB and the extension EX are installed on the front side frame.

[0123] Next, the effects of this embodiment will be described.

[0124] In the vehicle body structure S1 of the present embodiment, an extension EX is disposed between the bumper beam BB and a front side frame (not shown).

[0125] Furthermore, the vehicle width direction outer side end portion of the bumper beam BB and the vehicle width direction outer side end portion of the fixing plate 10 of the extension EX are connected to each other as one body via a connecting band 30 .

[0126] That is, the fixing plate 10 , the connecting band 30 , and the bumper beam BB are continuous as a single plate, and are arranged in a state of being bent so as to straddle the crush body 20 from the front and rear sides from the outer side in the vehicle width direction.

[0127] With such a configuration, when a collision load is input to the bumper beam BB from the front of the vehicle, the bumper beam BB crushes the crush body 20 of the extension EX to absorb the collision energy.

[0128] Furthermore, when a load (tensile load) acting in a direction away from the fixing plate 10 (from rear to front) is input to the bumper beam BB, the load acts on the fixing plate 10 via the connecting band 30 .

[0129] Thus, even when a tensile load acts on the bumper beam BB, the joining between the crushed body 20 and the fixing plate 10 can be maintained, and separation of the crushed body 20 from the fixing plate 10 can be suppressed.

[0130] In the vehicle body structure S1 of the present embodiment, the belt side fixing engaging piece 34 is provided on the rear end side (the vehicle compartment side in the vehicle front-rear direction) of the connecting belt 30 .

[0131] The belt side fixing main body engaging piece 35 provided at the rear end of the belt side fixing engaging piece 34 is bent inward in the vehicle width direction in a substantially L-shape and overlaps the fixing plate 10 from the vehicle width direction outer side.

[0132] The belt-side fixed body engaging piece 35 is engaged with a fixed body-side belt engaging portion 15 provided on a plate surface of the fixed plate 10 facing the vehicle rear (plate surface facing the vehicle interior side).

[0133] With such a configuration, when a tensile load acts on the connecting belt 30 via the bumper beam BB, the belt-side fixing body engaging piece 35 is hooked on the winding portion 14 of the fixing plate 10 .

[0134] This makes it possible to disperse the tensile load and reduce the load acting on the belt-side fixing engaging piece 34 .

[0135] In addition, since the fixing plate 10 is configured such that the fixing side belt joint piece 13 is bent toward the front of the vehicle and the protrusion toward the outer side in the vehicle width direction is suppressed, the layout property in the luggage room is improved.

[0136] In the vehicle body structure S1 of the present embodiment, the fixing plate 10 and the connecting belt 30 constituting the extension EX are formed of independent members and are joined together by spot welding to form a continuous integral body.

[0137] Thereby, the belt-side fixed body joining piece 35 and the fixed body-side belt joining portion 15 can be joined without affecting the assembly workability.

[0138] In the vehicle body structure S1 of the present embodiment, the fixed-side belt joint piece 13 constituting the fixing plate 10 is sandwiched and joined between the crush-side belt joint piece 24 constituting the crush body 20 and the belt-side fixed joint piece 34 constituting the connecting belt 30 .

[0139] This makes it possible to exhibit a stronger joint strength against a tensile load without causing an increase in weight or a rise in manufacturing cost.

[0140] In the vehicle body structure S1 of the present embodiment, the substantially L-shaped corner portion between the fixing body 11 of the fixing plate 10 and the fixing side belt engaging piece 13 is set at the wrap-around portion 14 .

[0141] Furthermore, the winding portion 14 bulges and curves toward the rear side, and a gap is formed between the winding portion 14 and the crushing body 20 .

[0142] With such a configuration, when a tensile load acts on the connecting band 30 via the bumper beam BB, the wraparound portion 14 is allowed to deform, thereby suppressing breakage of the connecting band 30 .

[0143] Thereby, the extension piece EX can exhibit the set load characteristics.

[0144] In the vehicle body structure S1 of the present embodiment, the fixing body 11 is provided with the working hole 11 a communicating with the inside of the cylindrical shape of the crushing body 20 .

[0145] With such a configuration, spot welding between the connecting band 30 and the bumper beam BB and spot welding between the connecting band 30 and the fixing plate 10 can be performed.

[0146] This allows the joining work to be performed without affecting the assembly workability.

[0147] In the vehicle body structure S1 of the present embodiment, the connection rib 31 a that protrudes and recedes in the vehicle width direction and extends in a raised shape in the up-down direction is formed on the connection belt 30 .

[0148] By adopting such a configuration, when a collision load from the front of the vehicle is input to the extension EX via the bumper beam BB, the crush body 20 can be crushed smoothly starting from the connecting rib 31 a .

[0149] Furthermore, when a tensile load acts on the extension EX via the bumper beam BB, the connection reinforcement rib 31 a is pulled, thereby suppressing the connection band 30 from being broken.

[0150] Thus, when either a compressive load or a tensile load is input, the extension member EX can exhibit the set load characteristics.

[0151] In the vehicle body structure S1 of the present embodiment, the crush ribs 21a protruding in the vertical direction are formed on the crush body 21. That is, the crush ribs 21a are formed to protrude in the cylindrical wall of the crush body 20.

[0152] Furthermore, the connecting rib 31 a and the crushing rib 21 a are arranged side by side in the vehicle width direction.

[0153] With such a configuration, when a collision load is input, the crushing ribs 21 a and the connecting ribs 31 a serve as starting points, and the crushing body 20 is crushed with high accuracy and smoothly, thereby being able to absorb the collision load.

[0154] In addition, in this embodiment, although spot welding is adopted as the joining means of the beam-side belt joining piece B3 and the belt-side beam joining piece 32, it is not limited to such a method.

[0155] For example, Figure 6 As shown, the following method can be adopted: the portion of the belt-side beam-joining piece 32 that overlaps with the beam-side belt-joining piece B3 is MIG-welded to form a lap fillet weld joint.

[0156] Furthermore, such a method can also achieve the same effects as those of the present embodiment.

[0157] In addition, the vehicle body structure S1 of the present embodiment configures the front end portion of the luggage room set in front of the vehicle cabin, but is not limited to the above-described embodiment.

[0158] For example, the present invention can be applied to a structure of a rear end portion of a luggage room set at the rear of a vehicle interior, and the same effects as those of the present embodiment can be obtained.

[0159] <Second embodiment>

[0160] Next, refer to Figure 7 A second embodiment of the present invention will be described.

[0161] In the description, the same elements as those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0162] The vehicle body structure S2 of the present embodiment is different from the vehicle body structure S1 of the first embodiment in the configurations of the fixing plate 10 and the connecting belt 30 .

[0163] In the first embodiment described above, the fixing plate 10 and the connecting belt 30 are formed of separate components and are joined together by spot welding to form a continuous and integrated structure.

[0164] On the other hand, in the present embodiment, the connection belt is configured as a part of the fixing plate 10 and thus is continuously integrated.

[0165] That is, on the fixing plate 10 , instead of the fixing side belt joint piece 13 , the connection body 41 extends forward from the vehicle width direction outer side end portion of the wrap-around portion 14 .

[0166] In addition, similarly to the connection reinforcement rib 31a, the belt side beam joining piece 32, and the belt side crush joining piece 33 of the first embodiment, a connection reinforcement rib 41a, a belt side beam joining piece 42, and a belt side crush joining piece 43 are formed on the connection body 41.

[0167] Furthermore, the belt-side beam-joining piece 42 is joined to the beam-side belt-joining piece B3 , and the belt-side crushing-joining piece 43 is joined to the crushing-side belt-joining piece 24 .

[0168] With such a configuration, the same operational effects as those of the first embodiment described above can be obtained.

[0169] Furthermore, since the connection body 41 is configured to extend from the fixing plate 10 , the number of components and the number of joining steps can be reduced.

[0170] <Third embodiment>

[0171] Next, refer to Figure 8 A third embodiment of the present invention will be described.

[0172] In the description, the same reference numerals are given to the same elements as those in the first embodiment, and duplicate descriptions are omitted.

[0173] The vehicle body structure S3 of the present embodiment is different from the vehicle body structure S1 of the first embodiment in the configurations of the fixing plate 10 and the connecting belt 30 .

[0174] The connecting belt 30 of the first embodiment is provided with the belt-side fixing main body engaging piece 35 and the belt-side winding portion 36 , but in the present embodiment, no corresponding configuration is provided.

[0175] As a result, the number of joint points between the fixing plate 10 and the connecting belt 30 is reduced compared to the first embodiment, and therefore the fixing side belt joint piece 13 is extended toward the front of the vehicle.

[0176] Furthermore, by extending the fixed-side belt joint piece 13 , the overlapping area between the fixed-side belt joint piece 13 and the belt-side fixed joint piece 34 increases, and thus the fixed-side belt joint piece 13 and the belt-side fixed joint piece 34 can be joined with the same strength as in the first embodiment.

[0177] With such a configuration, the same operational effects as those of the first embodiment described above can be obtained.

[0178] <Fourth embodiment>

[0179] Next, refer to Fig. 9 A fourth embodiment of the present invention will be described.

[0180] In the description, the same reference numerals are given to the same elements as those in the first embodiment, and duplicate descriptions are omitted.

[0181] The vehicle body structure S4 of the present embodiment is different from the vehicle body structure S1 of the first embodiment in the configurations of the fixing plate 10 and the connecting belt 30 .

[0182] In the above-mentioned first embodiment, the bumper beam BB and the connecting band 30 are formed of independent members and are joined together by spot welding to form a continuous and integrated structure.

[0183] On the other hand, in the present embodiment, the connecting band is configured to be continuous and integrated by constituting a part of the bumper beam BB.

[0184] That is, on the bumper beam BB, instead of the beam side belt joint piece B3, the connection body 51 extends toward the rear of the vehicle.

[0185] Further, similar to the connection reinforcement rib 31 a , the belt side crushing joint piece 33 , and the belt side fixing joint piece 34 of the first embodiment, the connection reinforcement rib 51 a , the belt side crushing joint piece 53 , and the belt side fixing joint piece 54 are formed on the connection body 51 .

[0186] Furthermore, the belt-side crushing joining piece 53 is joined to the crushing-side belt joining piece 24 , and the belt-side fixing joining piece 54 is joined to the fixing-side belt joining piece 13 .

[0187] It should be noted that, in the present embodiment, a structure corresponding to the winding portion 14 and the fixed main body side belt joint portion 15 is not provided.

[0188] Thus, compared with the configuration of the first embodiment, the number of joint points between the fixing plate 10 and the connection body 51 is reduced, and therefore the fixing-side belt joint piece 13 is extended toward the vehicle front.

[0189] Furthermore, by extending the fixed-side belt joining piece 13 , the overlapping area of ​​the fixed-side belt joining piece 13 and the belt-side fixed joining piece 54 increases, so that they can be joined with the same joining strength as in the first embodiment.

[0190] With such a configuration, the same operational effects as those of the first embodiment described above can be obtained.

[0191] Furthermore, since the connection body 51 is configured to extend from the bumper beam BB, the number of components and the number of joining steps can be reduced.

Claims

1. A vehicle body structure, characterized in that: An extension member is provided, the extension member being sandwiched between a bumper beam extending in the vehicle width direction and a side frame extending in the vehicle front-rear direction, The extension member includes: a fixing plate, which is formed of a plate-shaped member, faces the front-rear direction of the vehicle and is fixed to the protruding end of the side frame; a crushing body disposed on the fixing plate; and The connecting belt is composed of a plate-shaped member extending in the front-rear direction of the vehicle, and connects the outer end of the fixing plate in the vehicle width direction with the outer end of the bumper beam in the vehicle width direction to form a continuous whole. The connecting belt has a substantially L-shaped shape and includes a belt side fixing joint piece (34) provided on the vehicle compartment side in the vehicle front-rear direction and a belt side fixing main body joint piece (35) formed by bending the vehicle compartment side in the vehicle front-rear direction inward in the vehicle width direction of the belt side fixing joint piece (34). The belt side fixing body engaging piece (35) overlaps with the fixing plate (10) from the outside in the vehicle width direction and is engaged with the plate surface of the fixing plate (10) facing the vehicle compartment side in the vehicle compartment front-rear direction.

2. The vehicle body structure according to claim 1, characterized in that: The connecting belt and the crushing body are composed of independent components and are connected to form a continuous whole.

3. The vehicle body structure according to claim 2, characterized in that: The fixing plate comprises: A fixed body disposed facing the front-rear direction of the vehicle; and The fixed side belt engaging piece extends from the outer end portion of the fixed body in the vehicle width direction toward the outer side of the vehicle in the vehicle front-rear direction. The fixed side belt joint piece is joined between the crush body and the connecting belt.

4. The vehicle body structure according to claim 3, characterized in that: The substantially L-shaped corner portion between the fixing body and the fixing side belt engaging piece is bulged and bent toward the rear side of the corner portion, and a gap is formed between the crushing body and the crushing body.

5. The vehicle body structure according to claim 1, characterized in that: The fixing plate includes a working hole communicating with the cylindrical interior of the crushing body.

6. The vehicle body structure according to claim 1, characterized in that: The connecting belt includes a connecting rib extending in a raised shape.

7. The vehicle body structure according to claim 6, characterized in that: The crushing body has a cylindrical shape penetrating in the front-to-back direction. Equipped with crushing reinforcement ribs appearing on the cylinder wall, The connecting rib and the crushing rib are arranged side by side in the vehicle width direction.

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