WO2024189882A1 - 車両構造 - Google Patents

車両構造 Download PDF

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Publication number
WO2024189882A1
WO2024189882A1 PCT/JP2023/010275 JP2023010275W WO2024189882A1 WO 2024189882 A1 WO2024189882 A1 WO 2024189882A1 JP 2023010275 W JP2023010275 W JP 2023010275W WO 2024189882 A1 WO2024189882 A1 WO 2024189882A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
widening
cross member
widened
width direction
Prior art date
Application number
PCT/JP2023/010275
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
賢一 朽木
裕亮 山梨
Original Assignee
三菱自動車工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱自動車工業株式会社 filed Critical 三菱自動車工業株式会社
Priority to JP2025506410A priority Critical patent/JPWO2024189882A1/ja
Priority to PCT/JP2023/010275 priority patent/WO2024189882A1/ja
Publication of WO2024189882A1 publication Critical patent/WO2024189882A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members

Definitions

  • the present invention relates to a vehicle structure.
  • Patent Document 1 discloses a vehicle frame structure that includes a first side member extending in the longitudinal direction of the vehicle and a second side member that is provided behind the first side member and extends in the longitudinal direction of the vehicle, and in which the first side member and the second side member are joined together.
  • An impact absorbing member that absorbs collision energy is provided at the joint between the first side member and the second side member.
  • the shock absorbing member attached to the joint in the above frame structure absorbs collision energy by deforming upon collision with an external object, and it is difficult to reinforce the joint between the first and second side members while taking into consideration the load balance.
  • the present invention aims to provide a vehicle structure that is reinforced in a well-balanced manner while taking into account loads, while minimizing costs and weight increases.
  • a vehicle structure including a pair of side frames extending in a vehicle front-rear direction, and a cross member extending in a vehicle width direction and having both ends joined to the pair of side frames,
  • the side frame has a divided portion that is divided in the vehicle front-rear direction
  • the cross member has widened portions at both ends joined to the side frames, the widened portions being widened in the vehicle front-rear direction and the vehicle up-down direction
  • the widening portion is disposed so as to cover the division portion, and the widening dimension is larger on one side in the vehicle front-rear direction than on the other side across the division portion.
  • Vehicle structure including a pair of side frames extending in a vehicle front-rear direction, and a cross member extending in a vehicle width direction and having both ends joined to the pair of side frames,
  • the side frame has a divided portion that is divided in the vehicle front-rear direction
  • the cross member has widened portions at both ends joined to the side frames, the widened portions being wid
  • the present invention provides a vehicle structure that is reinforced in a well-balanced manner while taking into account loads, while minimizing costs and weight increases.
  • FIG. 1 is a perspective view showing a frame vehicle to which a vehicle structure according to an embodiment of the present invention is applied;
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG.
  • FIG. 3 is an enlarged view of a center portion in the vehicle width direction of FIG. 2 .
  • FIG. 4 is a plan view of the peripheral portion of the third cross member as viewed from above.
  • FIG. 4 is a plan view of the peripheral portion of the third cross member as viewed from below.
  • FIG. 2 is a perspective view of a cross member having both ends joined to side frames. 4 is a perspective view of a joint between a side frame and a cross member.
  • FIG. FIG. 4 is a perspective view of a widened portion of a cross member joined to a side frame.
  • FIG. 1 is a perspective view of a state in which a first member of a cross member joined to a side frame is separated.
  • FIG. 1 is a perspective view of a widened portion of a cross member joined to a side frame, as viewed from below.
  • FIG. 1 is a plan view of a widened portion of a cross member joined to a side frame, viewed from above.
  • FIG. 1 is a plan view of a widened portion of a cross member joined to a side frame as viewed from below.
  • FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 11.
  • 14 is a cross-sectional view taken along line XIV-XIV of FIG. 11.
  • the symbol FR indicates the front of the vehicle
  • the symbol UP indicates the upper side of the vehicle
  • the symbol HL indicates the vehicle width direction.
  • Fig. 1 is a perspective view showing a frame vehicle 10 to which a vehicle structure according to an embodiment of the present invention is applied.
  • Fig. 2 is a view taken along line II-II in Fig. 1.
  • Fig. 3 is an enlarged view of the center portion in the vehicle width direction in Fig. 2.
  • Fig. 4 is a plan view of the peripheral portion of a third cross member 26 as viewed from above.
  • Fig. 5 is a plan view of the peripheral portion of the third cross member 26 as viewed from below.
  • the vehicle structure according to this embodiment will be described as a frame vehicle 10 in which a cab body (not shown), which includes a passenger compartment in which occupants sit, is supported by a chassis frame 12 as a vehicle body component.
  • the frame vehicle 10 includes a pickup truck type vehicle in which a cab body and a cargo box located at the rear of the cab body are supported by a chassis frame 12 as vehicle body components.
  • the frame vehicle 10 is a pickup truck, with an engine and transmission (not shown) and front wheels 14 arranged at the front of the vehicle, and a differential gear 18 and rear wheels 16, which serve as drive wheels, arranged at the rear of the vehicle.
  • the chassis frame 12 is composed of a pair of side frames 20 and multiple cross members 22, 24, 26, 28, 30.
  • the pair of side frames 20 extend in the vehicle front-rear direction with a gap in the vehicle width direction.
  • the pair of side frames 20 include a front portion 20A extending rearward from the front end, a front inclined portion 20B inclined rearward and downward from the rear end of the front portion 20A, a central portion 20C extending rearward from the rear end of the front inclined portion 20B, a rear inclined portion 20D extending rearward and upward from the rear end of the central portion 20C, and a rear portion 20E extending rearward from the rear end of the rear inclined portion 20D.
  • the pair of side frames 20 support the cab body and cargo box from below via a plurality of mounts 32.
  • the multiple cross members extend in the vehicle width direction at multiple locations spaced apart in the vehicle's fore-and-aft direction, connecting a pair of side frames 20.
  • the multiple cross members are composed of five cross members: first, second, third, fourth, and fifth cross members 22, 24, 26, 28, and 30, and are arranged in that order from front to rear.
  • first cross member 22 is joined to the front portions 20A of the pair of side frames 20
  • second and third cross members 24, 26 are joined to the central portions 20C of the pair of side frames 20
  • fourth cross member 28 is joined to the rear inclined portions 20D of the pair of side frames 20
  • fifth cross member 30 is joined to the rear portions 20E of the pair of side frames 20.
  • a bumper beam 34 extending in the vehicle width direction is connected to the front ends of the pair of side frames 20, and a bumper fascia (not shown) is attached to the bumper beam 34.
  • a propeller shaft 36, a fuel tank 38, and an exhaust pipe 40 (see FIG. 4) are attached to the chassis frame 12.
  • the propeller shaft 36 connects the transmission and the differential gear 18, and transmits the driving force of the engine to the rear wheels 16 via the differential gear 18.
  • the transmission is located above the second cross member 24, and the differential gear 18 is located behind the fourth cross member 28.
  • the propeller shaft 36 extends in the fore-and-aft direction of the vehicle, passing above the third cross member 26 and below the fourth cross member 28.
  • the third cross member 26 passes below the propeller shaft 36 and extends in the vehicle width direction.
  • the propeller shaft 36 is supported above the center of the third cross member 26 in the vehicle width direction by a pair of brackets 44 that are spaced apart in the vehicle width direction at the center of the extension direction of the upper surface of the third cross member 26.
  • the fuel tank 38 is an on-board component made of synthetic resin or sheet metal and has an elongated shape.
  • the fuel tank 38 is provided between a pair of side frames 20 with its longitudinal direction aligned with the vehicle's fore-and-aft direction, and more specifically, is provided between the propeller shaft 36 and the side frame 20.
  • the fuel tank 38 is adjacent to the propeller shaft 36 on one side of the propeller shaft 36 in the vehicle width direction, and extends along the propeller shaft 36 in the vehicle's fore-and-aft direction.
  • the fuel tank 38 is provided on the rear side of the third cross member 26. More specifically, the fuel tank 38 extends from the rear of the third cross member 26 to the rear of the fourth cross member 28.
  • the front end of the fuel tank 38 is attached to a cantilever support bracket 46 extending from one side frame 20 toward the inside in the vehicle width direction, by being sandwiched from above and below by tank bands (not shown).
  • the rear end of the fuel tank 38 is attached to the fourth cross member 28.
  • the exhaust pipe 40 is a pipe through which exhaust from the engine passes.
  • the exhaust pipe 40 is a vehicle-mounted component that passes above the third cross member 26 between a pair of side frames 20 and extends in the fore-and-aft direction of the vehicle. More specifically, the exhaust pipe 40 is located between the propeller shaft 36 and the side frame 20 on the outer side of the propeller shaft 36 in the vehicle width direction on the side opposite the fuel tank 38 across the propeller shaft 36, and is adjacent to the propeller shaft 36 and extends along the propeller shaft 36 in the fore-and-aft direction of the vehicle.
  • the third cross member (hereinafter simply referred to as the cross member) 26 will be used as an example of the cross member that is joined to the side frame 20.
  • Figure 6 is a perspective view of the cross member 26 with both ends joined to the side frames 20.
  • Figure 7 is a perspective view of the joint between the side frames 20 and the cross member 26.
  • the cross member 26 is provided between a pair of side frames 20 arranged in parallel with each other, and both ends of the cross member 26 are joined to the side frames 20.
  • the side frame 20 has an outer frame 51 that forms the outer portion in the vehicle width direction, and an inner frame 53 that forms the inner portion in the vehicle width direction.
  • the side frame 20 is formed by assembling the outer frame 51 and the inner frame 53 together, and has a closed rectangular cross-sectional structure with an inner surface 21a, an outer surface 21b, an upper surface 21c, and a lower surface 21d.
  • the side frame 20 is narrower toward the rear of the vehicle than the joint with the cross member 26.
  • the outer frame 51 and the inner frame 53 are divided in the vehicle fore-and-aft direction at divisions 51A, 53A, respectively. These divisions 51A, 53A are positioned at positions offset from each other in the vehicle fore-and-aft direction.
  • the outer frame 51 and the inner frame 53, which are divided in the vehicle fore-and-aft direction, are joined at divisions 51A, 53A, with one end of each in the vehicle fore-and-aft direction being placed over the other end.
  • the cross member 26 has a central portion 55 that constitutes the central portion in the vehicle width direction, and a pair of widened portions 57, 57 that constitute both end portions in the vehicle width direction.
  • Each of the pair of widened portions 57, 57 is joined to the side frame 20 (inner frame 53) so as to cover the division portion 53A of the inner frame 53 in the side frame 20.
  • Figure 8 is a perspective view of the widened portion 57 of the cross member 26 joined to the side frame 20.
  • Figure 9 is a perspective view of the first member 61 of the cross member 26 joined to the side frame 20 in a separated state.
  • Figure 10 is a perspective view of the widened portion 57 of the cross member 26 joined to the side frame 20 as viewed from below.
  • Figure 11 is a plan view of the widened portion 57 of the cross member 26 joined to the side frame 20 as viewed from above.
  • Figure 12 is a plan view of the widened portion 57 of the cross member 26 joined to the side frame 20 as viewed from below.
  • Figure 13 is a cross-sectional view taken along line XIII-XIII in Figure 11.
  • Figure 14 is a cross-sectional view taken along line XIV-XIV in Figure 11.
  • the widened portion 57 of the cross member 26 has a shape that is widened in the vehicle front-rear direction and the vehicle up-down direction. This widened portion 57 is positioned to cover the dividing portion 53A, and its edge is welded and joined to the side frame 20 with the side frame 20 facing the widened portion 57.
  • the cross member 26 is divided into an upper part and an lower part, the upper side (one side) of the divided cross member 26 being the first member 61 and the lower side (the other side) being the second member 63.
  • the first member 61 has a pair of first widening sections 71, 71 at both ends in the vehicle width direction, and the first widening section 71 is widened in the vehicle up-down direction and the vehicle front-rear direction.
  • the second member 63 has a pair of second widening sections 73, 73 at both ends in the vehicle width direction, and the second widening section 73 is widened in the vehicle front-rear direction.
  • the first member 61 has a first central portion 75 between a pair of first widening portions 71, 71. That is, the first member 61 is composed of a first central portion 75 and a pair of first widening portions 71, 71 joined to both ends of the first central portion 75.
  • the second member 63 has a second central portion 77 between a pair of second widening portions 73, 73. That is, the second member 63 is composed of a second central portion 77 and a pair of second widening portions 73, 73 joined to both ends of the second central portion 77.
  • the cross member 26 is constructed by assembling a first member 61 and a second member 63, which are arranged at the top and bottom of the vehicle.
  • the cross member 26 constructed in this way has a closed rectangular cross-sectional structure with a front side 27a, a rear side 27b, an upper surface 27c, and a lower surface 27d.
  • a divided portion 61A between the first central portion 75 and the first widening portion 71 in the first member 61 and a divided portion 63A between the second central portion 77 and the second widening portion 73 in the second member 63 are positioned at different positions in the vehicle width direction. Specifically, the divided portion 61A between the first central portion 75 and the first widening portion 71 in the first member 61 is positioned outside in the vehicle width direction than the divided portion 63A between the second central portion 77 and the second widening portion 73 in the second member 63.
  • the first member 61 divided in the vehicle width direction is joined at the divided portion 61A by covering the vehicle width outer end of the first central portion 75 with the vehicle width inner end of the first widening portion 71 and welding it to the vehicle width outer end.
  • the second member 63 which is divided in the vehicle width direction, is joined at the divided portion 63A by covering the vehicle width outer end of the second central portion 77 with the vehicle width inner end of the second widened portion 73 and welding it to the divided portion 63A.
  • the first widening portion 71 constituting the first member 61 has a notch 79 on its edge on the side of the second widening portion 73 constituting the second member 63. More specifically, the notch 79 is formed at the lower end of a joint surface 81 (described later) on the periphery of the first widening portion 71. As a result, when the first member 61 and the second member 63 are joined to form the cross member 26, a gap formed by the notch 79 is formed between the edge (joint surface 81) of the first widening portion 71 and the edge (joint surface 85) of the second widening portion 73 in the vertical direction of the vehicle.
  • the first widening portion 71 has a joint surface portion 81 that abuts and is joined to the side frame 20 on the front, upper, and rear peripheral portions excluding the second member 63 side (lower side).
  • This joint surface portion 81 is a joint surface that abuts and is welded to the inner surface 21a of the side frame 20.
  • the first widening portion 71 is formed with an escape recess 83 to avoid interference with the dividing portion 53A that protrudes toward the outer periphery when the joint surface portion 81 abuts and is joined to the inner surface 21a of the side frame 20.
  • the second widening portion 73 has a pair of joint surfaces 85, 85 at the front and rear edges that come into contact with and are joined to the side frame 2.
  • the joint surfaces 85 are joint surfaces that come into contact with and are welded to the inner surface 21a of the side frame 20.
  • the second widening portion 73 also has a joint piece 87 that protrudes toward the underside 21d of the side frame 20.
  • the joint piece 87 is a joint surface that comes into contact with and is welded to the underside 21d of the side frame 20.
  • the second widening portion 73 also has an escape recess 89 formed therein to avoid interference with the dividing portion 53A that protrudes toward the outer periphery when the joint piece 87 is brought into contact with and joined to the underside 21d of the side frame 20.
  • both ends of the cross member 26 have widened portions 57 that are widened in the vehicle longitudinal direction and the vehicle vertical direction, and these widened portions 57 are positioned and joined to cover the division portion 53A of the side frame 20. This ensures the rigidity of the side frame 20 and distributes the load on the division portion 53A in the vehicle longitudinal direction and the vehicle vertical direction.
  • the widening portion 57 of the cross member 26 that is joined to cover the dividing portion 53A of the side frame 20 has a larger widening dimension Wr on the rear side (one side) than the widening dimension Wf on the front side (the other side) of the dividing portion 53A in the vehicle longitudinal direction (see FIG. 13).
  • the rigidity of the rear side (one side) in the vehicle longitudinal direction across the dividing portion 53A can be made higher than that of the front side (the other side).
  • the reinforcement can be performed in a balanced manner while taking the load into consideration, while minimizing the increase in weight required for reinforcement. This makes it possible to suppress increases in cost and weight due to an increase in the number of parts and assembly steps, compared to when a separate reinforcing member is attached for reinforcement, while providing reinforcement in a well-balanced manner that takes the load into consideration.
  • the torsional rigidity between the rear and front sides of the vehicle in the fore-and-aft direction on either side of the split portion 53A is made uniform, improving ride comfort and preventing damage on the low rigidity side.
  • the widening portion 57 is widened in the vehicle longitudinal direction while inclining more gently at the rear side than at the front side, sandwiching the dividing portion 53A therebetween (see Figures 8 and 13). Therefore, the load dispersion effect of the widening portion 57 at the rear side in the vehicle longitudinal direction is further enhanced than at the front side.
  • the widening portion 57 of the cross member 26 has a larger width dimension in the vehicle longitudinal direction toward the lower side (one side) in the vehicle vertical direction (see FIG. 13). Therefore, the load applied to the joint between the side frame 20 and the cross member 26 can be effectively distributed in the vehicle longitudinal direction by the widening portion 57.
  • the width of the widened portion 57 of the cross member 26 is increased in the vehicle longitudinal direction toward the outer side in the vehicle width direction (see FIG. 11). Therefore, the load applied to the joint between the side frame 20 and the cross member 26 can be effectively distributed in the vehicle longitudinal direction by the widened portion 57.
  • the width of the widened portion 57 of the cross member 26 is increased in the vertical direction of the vehicle toward the outer side in the vehicle width direction (see FIG. 14). Therefore, the load applied to the joint between the side frame 20 and the cross member 26 can be effectively distributed in the vertical direction of the vehicle by the widened portion 57.
  • the cross member 26 has a lower surface 27d that extends linearly in the vehicle width direction (see Figures 10 and 14).
  • the cross member 26, whose lower surface 27d extends linearly in the vehicle width direction, can effectively reinforce the division portion 53A of the side frame 20.
  • the widened portion 57 of the cross member 26 is joined to the inner surface 21a of the side frame 20, and further, the joint piece portion 87 of the second widened portion 73 is joined to the underside 21d of the side frame 20 (see Figures 10, 12, and 14). This further enhances the reinforcing effect of the division portion 53A of the side frame 20.
  • the cross member 26 is divided into a first member 61 having a first widening portion 71 and a second member 63 having a second widening portion 73. This makes it possible to easily manufacture the cross member 26 with the widening portion 57 by assembling the first member 61 and the second member 63 together.
  • first member 61 is divided into a first central portion 75 and a pair of first widening portions 71, 71
  • first member 61 can be easily manufactured by assembling the first central portion 75 and the pair of first widening portions 71, 71.
  • second member 63 is divided into a second central portion 77 and a pair of second widening portions 73, 73
  • the second member 63 can be easily manufactured by assembling the second central portion 77 and the pair of second widening portions 73, 73.
  • the cross member 26 is divided into a central portion 55 consisting of a first central portion 75 and a second central portion 77, and a widening portion 57 consisting of a first widening portion 71 and a second widening portion 73. This allows the widening portion 57 to absorb the difference in rigidity between the side frame 20 and the cross member 26, thereby suppressing the generation of stress due to the difference in rigidity.
  • the divided portion 61A between the first central portion 75 and the first widening portion 71 and the divided portion 63A between the second central portion 77 and the second widening portion 73 are positioned at different positions in the vehicle width direction, the stress acting on these divided portions 61A, 63A can be distributed to different positions in the vehicle width direction.
  • a notch 79 is formed in the edge of the first widening portion 71 of the first member 61 on the side of the side frame 21 in the vehicle width direction, on the side of the second widening portion 73 of the second member 63. This makes it possible to avoid stress concentration on the edge of the first widening portion 71 on the side of the second widening portion 73, particularly on the end on the side frame 21 side in the vehicle width direction, and suppresses damage to the edge of the first widening portion 71.
  • the side frame 20 is composed of an outer frame 51 that constitutes the outer portion in the vehicle width direction and an inner frame 53 that constitutes the inner portion in the vehicle width direction, and the widened portion 57 of the cross member 26 is joined to the divided portion 53A of the inner frame 53. This increases the yield rate during the manufacture of the side frame 20, while ensuring sufficient rigidity at the divided portion 53A of the inner frame 53 by the widened portion 57 of the cross member 26.
  • the side frame 20 of the frame vehicle 10 of this embodiment is narrower on the rear side (one side) of the dividing portion 53A than on the front side (the other side) in the vehicle front-rear direction.
  • the rigidity of the rear side where the side frame 20 is narrow is low, and the torsional rigidity is also uneven.
  • the widening portion 57 of the cross member 26 joined to the dividing portion 53A has a larger widening dimension on the rear side (one side) in the vehicle fore-and-aft direction across the dividing portion 53A than on the front side (the other side), so that the rigidity of the rear side, which is thinner than the front side of the side frame 20, can be increased.
  • This makes it possible to equalize the torsional rigidity in the vehicle fore-and-aft direction across the dividing portion 53A, improving ride comfort, and also suppressing damage to the rear side, which has lower rigidity.
  • the widening portion 57 has a larger rear width dimension Wr than a larger front width dimension Wf in the vehicle fore-and-aft direction across the dividing portion 53A, but the widening portion 57 may have a larger front width dimension Wf than a rear width dimension Wr in the vehicle fore-and-aft direction across the dividing portion 53A.
  • the rigidity of the front side of the side frame 20 in the vehicle fore-and-aft direction across the dividing portion 53A can be made higher than that of the rear side.
  • the cross member 26 consisting of the first member 61 and the second member 63 is joined to the side frame 20 with the first member 61 on the lower side, but the cross member 26 may be joined to the side frame 20 upside down.
  • the joint piece portion 87 of the second widening portion 73 constituting the widening portion 57 of the cross member 26 is joined to the upper surface 21c of the side frame 20.
  • the present invention is not limited to the above-described embodiment, and the invention also contemplates the mutual combination of the various components of the embodiment, as well as modifications and applications by those skilled in the art based on the descriptions in the specification and well-known technology, and these are included in the scope of the protection sought.
  • a vehicle structure including a pair of side frames extending in a vehicle front-rear direction and a cross member extending in a vehicle width direction and having both ends joined to the pair of side frames,
  • the side frame has a divided portion that is divided in the vehicle front-rear direction
  • the cross member has widened portions at both ends joined to the side frames, the widened portions being widened in the vehicle front-rear direction and the vehicle up-down direction
  • the widened portion of the cross member is joined to the divided portion of the side frame and the divided portion is covered by the widened portion of the cross member, which ensures the rigidity of the side frame and distributes the load on the divided portion in the front-rear and up-down directions of the vehicle.
  • the rigidity of one side of the division in the vehicle longitudinal direction can be made higher than that of the other side.
  • the torsional rigidity on one side and the other side of the divided portion in the longitudinal direction of the vehicle can be made uniform, improving ride comfort, and damage to the low rigidity side can be suppressed.
  • the widening portion is widened while being inclined more gently on the one side in the vehicle front-rear direction across the dividing portion than on the other side.
  • the cross member is divided into an upper part and an lower part, and one side of the divided cross member is a first member and the other side is a second member,
  • the cross member is divided into a first member having a first widening portion and a second member having a second widening portion, and by assembling these first and second members together, a cross member with a widening portion can be easily manufactured.
  • the first member is divided into a first central portion constituting a central portion in the vehicle width direction and a pair of the first widened portions constituting both end portions in the vehicle width direction
  • the second member is divided into a second central portion constituting a central portion in the vehicle width direction and a pair of the second widened portions constituting both end portions in the vehicle width direction
  • the vehicle structure described in (9) wherein the dividing portion between the first central portion and the first widening portion and the dividing portion between the second central portion and the second widening portion are located at different positions in the vehicle width direction.
  • the first member since the first member is divided into a first central portion and a first widened portion, the first member can be easily manufactured by assembling the first central portion and the first widened portion.
  • the second member since the second member is divided into a second central portion and a second widened portion, the second member can be easily manufactured by assembling the second central portion and the second widened portion.
  • the cross member is divided into a central portion consisting of a first central portion and a second central portion, and a widening portion consisting of a first widening portion and a second widening portion, the rigidity difference between the side frame and the cross member is absorbed by the widening portion, and stress generation due to the rigidity difference can be suppressed.
  • the stress acting on the divided portion between the first central portion and the first widened portion and the divided portion between the second central portion and the second widened portion can be dispersed to different positions in the vehicle width direction.
  • the side frame includes an outer frame constituting an outer portion in the vehicle width direction and an inner frame constituting an inner portion in the vehicle width direction,
  • the vehicle structure according to any one of (1) to (11), wherein the dividing portion is provided in the inner frame. According to this vehicle structure, the yield rate during manufacturing of the side frames can be increased, while the widened portion of the cross member can ensure sufficient rigidity at the divided portion of the inner frame.
  • Frame vehicle (vehicle structure) Reference Signs List 12 Chassis frame 14 Front wheel 16 Rear wheel 18 Differential gear 20 Side frame 20A Front portion 20B Front inclined portion 20C Central portion 20D Rear inclined portion 20E Rear portion 21a Inner surface 21b Outer surface 21c Upper surface 21d Lower surface 22 First cross member 24 Second cross member 26 Third cross member (cross member) 27a Front side 27b Rear side 27c Top surface 27d Bottom surface 28 Fourth cross member 32 Mount 34 Bumper beam 36 Propeller shaft 38 Fuel tank 40 Exhaust pipe 44 Bracket 46 Support bracket 51 Outer frame 51A Divided portion 53 Inner frame 53A Divided portion 55 Central portion 57 Widened portion 61 First member 61A Divided portion 63 Second member 63A Divided portion 71 First widened portion 73 Second widened portion 75 First central portion 77 Second central portion 79 Notch portion 81 Joint surface portion 83 Recess 85 Joint surface portion 87 Joint piece portion 89 Recess Wf, Wr Widened dimension

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
PCT/JP2023/010275 2023-03-16 2023-03-16 車両構造 WO2024189882A1 (ja)

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PCT/JP2023/010275 WO2024189882A1 (ja) 2023-03-16 2023-03-16 車両構造

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Citations (6)

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JPS60176976U (ja) * 1984-05-07 1985-11-25 三菱自動車工業株式会社 車体のサイドメンバとクロスメンバとの結合構造
JPH02208171A (ja) * 1989-02-06 1990-08-17 Mitsubishi Motors Corp トラックの車台フレーム
WO2011101906A1 (ja) * 2010-02-18 2011-08-25 フォード グローバル テクノロジーズ、リミテッド ライアビリティ カンパニー 車両の前面衝突エネルギー吸収構造
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