WO2015064311A1 - 車両の骨格構造 - Google Patents
車両の骨格構造 Download PDFInfo
- Publication number
- WO2015064311A1 WO2015064311A1 PCT/JP2014/076715 JP2014076715W WO2015064311A1 WO 2015064311 A1 WO2015064311 A1 WO 2015064311A1 JP 2014076715 W JP2014076715 W JP 2014076715W WO 2015064311 A1 WO2015064311 A1 WO 2015064311A1
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- WIPO (PCT)
- Prior art keywords
- wall
- skeleton
- vehicle
- closed cross
- portions
- Prior art date
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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
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/04—Door pillars ; windshield pillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/14—Dashboards as superstructure sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2045—Floors or bottom sub-units in connection with other superstructure subunits the subunits being fire walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
- B62D29/005—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material preformed metal and synthetic material elements being joined together, e.g. by adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/041—Understructures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/043—Superstructures
Definitions
- the present invention relates to a vehicle skeleton structure.
- a vehicle skeleton member structure in which an internal skeleton member having a closed cross-sectional structure is disposed in a curved portion of a vehicle skeleton member having a closed cross-sectional structure, and bending deformation generated in the curved portion due to input of a load is suppressed.
- an object of the present invention is to obtain a vehicle skeleton structure capable of suppressing bending deformation generated in the skeleton member by input of a load.
- the vehicle skeleton structure according to the first aspect of the present invention is formed in a closed cross-sectional shape having a plurality of first wall portions and a plurality of first corner portions, and the vehicle skeleton structure.
- the vehicle skeleton structure are formed in a closed cross-sectional shape having a plurality of second wall portions and a plurality of second corner portions, and the plurality of second corner portions are the plurality of first wall portions or the plurality of the plurality of second wall portions.
- Each of the plurality of second wall portions is opposed to the plurality of first wall portions or the plurality of first corner portions, respectively.
- a reinforcing member made of fiber reinforced resin forming a plurality of closed cross-sectional shapes.
- the plurality of second wall portions and the plurality of second corner portions are within the closed cross-sectional shape of the skeleton member having the plurality of first wall portions and the plurality of first corner portions.
- the vehicle skeleton structure according to the second aspect of the present invention is the vehicle skeleton structure according to the first aspect, and is opposed to the plurality of first wall portions or the plurality of first corner portions, respectively.
- the wall surfaces of the plurality of second wall portions are formed in a curved shape that is recessed inward of the skeleton member in a cross-sectional view as viewed from the longitudinal direction of the skeleton member.
- the wall surfaces of the plurality of second wall portions are formed in a curved shape that is recessed inward of the skeleton member in a cross-sectional view as viewed from the longitudinal direction of the skeleton member. Therefore, compared with the case where the wall surfaces of the plurality of second wall portions are not formed in a curved shape that is recessed inward of the skeleton member, the stress applied to the reinforcing member is easily dispersed.
- the vehicle skeleton structure according to the third aspect of the present invention is the vehicle skeleton structure according to the first or second aspect, and is opposed to each of the plurality of second wall portions, or the plurality of the plurality of skeleton structures.
- the wall surfaces of the plurality of first wall portions that are in contact with the second corner portions are each formed in a curved shape that swells outward of the skeleton member in a cross-sectional view as viewed from the longitudinal direction of the skeleton member.
- the wall surfaces of the plurality of first wall portions are formed in a curved shape that swells outward of the skeleton member in a cross-sectional view as viewed from the longitudinal direction of the skeleton member. Therefore, compared with the case where the wall surface of a some 1st wall part is not formed in the curved-surface shape which swells to the outward side of a skeleton member, the proof strength with respect to the bending deformation of a skeleton member is improved.
- a vehicle skeleton structure according to a fourth aspect of the present invention is the vehicle skeleton structure according to any one of the first to third aspects, wherein the reinforcing members face each other within a closed cross-sectional shape. Reinforcing ribs that connect the second wall portions or the second corner portions are provided.
- the reinforcing rib for connecting the second wall portions or the second corner portions facing each other is provided in the closed cross-sectional shape of the reinforcing member. Therefore, the resistance to bending deformation of the reinforcing member is improved.
- a vehicle skeleton structure according to a fifth aspect of the present invention is the vehicle skeleton structure according to any one of the first to fourth aspects, wherein the plurality of the plurality of first and second corner portions respectively oppose each other. Separating ribs are provided on the wall surface of the second wall portion so as to approach or abut each of at least the plurality of first corner portions when viewed from the longitudinal direction of the skeleton member.
- partition wall ribs are provided on the wall surfaces of the plurality of second wall portions so as to approach or contact at least the plurality of first corner portions as viewed from the longitudinal direction of the skeleton member. ing. Therefore, the cross-sectional deformation of the first corner is suppressed by the partition rib.
- the vehicle skeleton structure according to the sixth aspect of the present invention is the vehicle skeleton structure according to any one of the first to fifth aspects, and the orientation of the fibers in the reinforcing member is the longitudinal direction of the skeleton member. Along the direction.
- the fiber orientation in the reinforcing member is along the longitudinal direction of the skeleton member. Therefore, the strength against bending deformation of the skeleton member is further improved by the reinforcing member.
- the vehicle skeleton structure according to the seventh aspect of the present invention is the vehicle skeleton structure according to the fifth aspect, and the orientation of the fibers in the partition rib is from the second wall portion to the first corner portion. Along the direction towards.
- the fiber orientation in the partition rib is along the direction from the second wall portion toward the first corner portion. Therefore, the yield strength against the bending deformation of the partition rib is improved, and thereby the cross-sectional deformation of the first corner is further suppressed.
- the vehicle skeleton structure according to the eighth aspect of the present invention is the vehicle skeleton structure according to any one of the first to seventh aspects, and the reinforcing members are fitted to each other so as to have a closed cross section. It is comprised by the 1st member and 2nd member which form a shape.
- the reinforcing member is composed of the first member and the second member that form a closed cross-sectional shape by being fitted to each other. Therefore, the incorporation property of the reinforcing member into the skeleton member is improved.
- the vehicle skeleton structure according to the ninth aspect of the present invention is formed in a closed cross-sectional shape, and is formed into a skeleton member constituting the skeleton of the vehicle and a closed cross-sectional shape, and the wall portion of the skeleton member or A reinforcing member made of a fiber reinforced resin that is disposed in a closed cross-sectional shape of the skeleton member in contact with a corner and forms a plurality of closed cross-sectional shapes with the skeleton member.
- the reinforcing member having the closed cross-sectional shape is disposed in the closed cross-sectional shape of the skeleton member so as to be in contact with the wall portion or the corner portion of the skeletal member, and is reinforced with the skeleton member.
- a plurality of closed cross-sectional shapes are formed between the members. Therefore, the strength (rigidity) of the skeleton member is improved by the reinforcing member. Therefore, bending deformation generated in the skeleton member due to the input of the load is suppressed.
- the stress applied to the reinforcing member can be easily dispersed.
- the resistance to bending deformation of the skeleton member can be improved.
- the strength of the reinforcing member against bending deformation can be improved.
- the cross-sectional deformation of the first corner can be suppressed.
- the strength against bending deformation of the skeleton member can be further improved.
- the strength against bending deformation of the partition rib can be improved, and the cross-sectional deformation of the first corner can be further suppressed.
- the incorporation of the reinforcing member into the skeleton member can be improved.
- bending deformation generated in the skeleton member due to input of a load can be suppressed.
- an arrow UP appropriately shown in each drawing is an upward direction of the vehicle body
- an arrow FR is a forward direction of the vehicle body
- an arrow OUT is an outer side of the vehicle width direction.
- the vertical direction of the vehicle body, the front / rear direction of the vehicle body direction, and the left / right direction of the vehicle body (vehicle width direction) are indicated.
- the left side of the vehicle 12 provided with the skeleton structure 10 according to the present embodiment is shown in each drawing, the right side of the vehicle 12 is the same in the left-right symmetry.
- a pair of left and right front side members 14 as a skeleton member having a closed cross-sectional shape with the longitudinal direction of the vehicle body as a longitudinal direction are disposed on both sides of the front portion of the vehicle 12.
- An inclined part (kick part) 14A is formed in the middle in the longitudinal direction of each front side member 14, and each front side member 14 has a predetermined height higher than the inclined part 14A on the vehicle front side than the vehicle rear side. It extends in the longitudinal direction of the vehicle body at a high position (high position).
- a pair of left and right rear floor side members 16 as a skeleton member having a closed cross-sectional shape with the longitudinal direction of the vehicle body as a longitudinal direction is disposed on both sides of the rear portion of the vehicle 12.
- An inclined portion (kick portion) 16A is formed in the middle in the longitudinal direction of each rear floor side member 16, and each rear floor side member 16 has a predetermined height on the rear side of the vehicle body relative to the front side of the vehicle body relative to each inclined portion 16A. It extends in the longitudinal direction of the vehicle body at a high position (high position).
- the front side member 14 and the rear floor side member 16 are integrally formed continuously through a floor member 15 as a skeleton member having a closed cross-sectional shape extending in the longitudinal direction of the vehicle body. Further, since the skeleton structure 10 of the vehicle 12 on the rear floor side member 16 side is the same as the skeleton structure 10 of the vehicle 12 on the front side member 14 side, the skeleton structure 10 of the vehicle 12 on the front side member 14 side will be described below. Will be described.
- the vehicle 12 extends along the upper surface of the inclined portion 14A of the front side member 14, and extends from the front end portion of the inclined portion 14A toward the vehicle body upward.
- a substantially flat dash panel 18 that partitions the compartment room 30 and the vehicle compartment 20 is provided.
- the front side member 14 (including the inclined portion 14A) is formed into a substantially flat plate shape with an under member 22 formed in a substantially hat-shaped cross section with a steel plate and the like, and a steel plate and the like. And an upper member 24 formed.
- the front side member 14 is joined to the left and right flange portions 23 formed at the upper end portion of the under member 22 and the flange portions 25 formed at the left and right end portions of the upper member 24 by spot welding or the like. Thus, it is formed in a closed cross-sectional shape.
- the lower wall 32, the inner wall 34, and the outer wall 36 of the under member 22 (front side member 14), and the upper wall 38 of the upper member 24 (front side member 14) serve as a plurality of first wall portions (or wall portions). It corresponds.
- the wall surfaces (at least the inner surfaces) 32A, 34A, 36A, 38A of the lower wall 32, the inner wall 34, the outer wall 36, and the upper wall 38 are respectively the front side member 14. It is formed in a curved surface shape (arc shape) that bulges outward.
- the corners 39 between the upper wall 38 and the outer wall 36 include a plurality of first corners ( Or a corner).
- the front end portion and the rear end portion (boundary portion with the floor member 15) of the inclined portion 14 ⁇ / b> A are a front bent portion 26 and a rear bent portion 28, respectively.
- the front bent portion 26 is a bent portion that is bent (or curved) so as to be convex toward the upper side of the vehicle body
- the rear bent portion 28 is bent (or curved) so as to be protruded toward the lower side of the vehicle body. It is a bent part.
- the front bent portion 26 uses the maximum bent portion (or the maximum curvature portion) as a deformation starting point.
- the rear bent portion 28 is bent and deformed to the upper side of the vehicle body, and the rear bent portion 28 is bent and deformed to the lower side of the vehicle body with the maximum bent portion (or the maximum curvature portion) as a deformation starting point.
- the under member 22 side (lower wall 32) of the front side member 14 is a wall portion on the compression deformation side (stress concentration side), and the upper member 24 side (upper wall 38) is tensioned. It is a wall on the deformation side.
- the upper member 24 side (upper wall 38) of the front side member 14 is a wall portion on the compression deformation side (stress concentration side), and the under member 22 side (lower wall 32) is on the side. It is a wall portion on the tensile deformation side.
- FRP fiber reinforced resin material
- GFRP glass fiber reinforced resin material
- CFRP carbon fiber reinforced resin material
- the reinforcing member 40 is formed in a closed cross-sectional shape (square tube shape) in which the extending direction of the front side member 14 is the longitudinal direction, and the shape of the front bent portion 26 is formed. Is bent (curved).
- the reinforcing member 40 includes a wall portion 42 that faces the lower wall 32, a wall portion 44 that faces the inner wall 34, a wall portion 46 that faces the outer wall 36, a wall portion 48 that faces the upper wall 38, have.
- each wall surface (at least the outer surface) 42A, 44A, 46A, 48A of each wall portion 42, 44, 46, 48 is respectively the front side.
- the member 14 (reinforcing member 40) is formed in a curved surface shape (arc shape) that is recessed toward the inner side (axial center side).
- the reinforcing member 40 includes a corner portion 43 between the wall portion 42 and the wall portion 44, a corner portion 45 between the wall portion 42 and the wall portion 46, and a space between the wall portion 48 and the wall portion 44.
- a corner portion 47 and a corner portion 49 between the wall portion 48 and the wall portion 46 are provided. That is, each wall 42, 44, 46, 48 corresponds to a plurality of second walls in the reinforcing member 40, and each corner 43, 45, 47, 49 is a plurality of second walls in the reinforcing member 40. It corresponds to the corner.
- the reinforcing member 40 is arranged in the closed cross-sectional shape of the front side member 14 so that the corners 43, 45, 47, and 49 are in contact with the corners 33, 35, 37, and 39, respectively.
- each wall part 42,44,46,48 (each wall surface 42A, 44A, 46A, 48A) of the reinforcement member 40 is respectively set to the lower wall 32 of the front side member 14, the inner wall 34, the outer wall 36, and the upper wall 38 ( A plurality of (in this case, four) closed cross-sectional shapes are formed facing each of the wall surfaces 32A, 34A, 36A, 38A).
- each of the four closed cross-sectional shapes is composed of curved surfaces.
- stress applied to the curved lower wall 32, inner wall 34, outer wall 36, upper wall 38 and the wall portions 42, 44, 46, and 48 is easily dispersed.
- each closed cross-sectional shape itself has rigidity Accordingly, the resistance to bending deformation of the front bent portion 26 and the rear bent portion 28 in which the reinforcing member 40 is provided is improved.
- the curvatures of the wall portions 42, 44, 46, 48 of the reinforcing member 40 are the same as or more than the curvatures of the lower wall 32, the inner wall 34, the outer wall 36, and the upper wall 38 of the front side member 14 facing each other. It has been enlarged. This is because the greater the curvature of the curved surface, the easier the stress is dispersed and the more difficult it is to deform. Therefore, it is desirable that the reinforcing member 40 has the wall portion 48 having a large curvature on the tensile deformation side (the upper member 24 side in the case of the front bent portion 26).
- the respective corners 43, 45, 47, 49 of the reinforcing member 40 are bonded to the respective corners 33, 35, 37, 39 of the front side member 14 by an adhesive (for example, a structural adhesive having high adhesive strength). It may be configured.
- the reinforcing member 40 includes a reinforcing rib 52 that integrally connects the wall portion 42 and the wall portion 48 facing each other.
- the reinforcing rib 52 is formed in a substantially flat plate shape in which the extending direction of the front side member 14 (reinforcing member 40) is the longitudinal direction, and the cross-sectional deformation of the reinforcing member 40 is suppressed.
- the reinforcing ribs 52 are designed to improve the strength against bending deformation and crushing (buckling) deformation of the reinforcing member 40 in the vertical direction.
- the reinforcing rib 52 is not limited to the illustrated mode.
- the reinforcing rib 52 may be provided so as to integrally connect the wall portion 44 and the wall portion 46 that face each other.
- Reinforcing ribs 52 may be provided so as to be integrally connected (reinforcing ribs 52 may be formed in a cross-shaped cross section). That is, the reinforcing ribs 52 may be provided along a direction in which the reinforcing member 40 is desired to be prevented from being bent or crushed.
- the reinforcing ribs 52 may be provided so as to integrally connect the corners 43 and 49 facing each other, or the reinforcing ribs 52 so as to integrally connect the corners 45 and 47 facing each other. May be provided. Further, for example, reinforcing ribs 52 may be provided so as to integrally connect the corners 43 and 49 facing each other and the corners 45 and 47 facing each other (the reinforcing ribs 52 are formed in a cross-shaped cross section). You may).
- the reinforcing member 40 is manufactured by injection molding as an example, and a fiber reinforced resin material is fed from a gate of a mold (not shown) corresponding to a central portion in the vehicle width direction on one end side in the longitudinal direction. It is injected and molded. Thereby, the orientation of the fibers F in each of the wall portions 42, 44, 46, 48 and the reinforcing rib 52 is substantially along the extending direction (longitudinal direction of the front side member 14).
- a support portion for supporting a suspension member (not shown) in a suspended state, and an engine and a transmission (power unit) (not shown) are suspended from a straight portion on the front side of the vehicle body from the front bent portion 26 of the front side member 14.
- An engine mount is provided for support. Therefore, during traveling of the vehicle 12, a load directed toward the vehicle body lower side is input to the straight portion of the front side member 14 through the support portion and the engine mount due to vibration generated in the vehicle 12.
- the front bent portion 26 is a portion that is bent (or curved) in advance and is a portion that becomes a deformation starting point. Therefore, when the load is input, the front bent portion 26 may be elastically deformed to be bent. When the amount of elastic deformation increases, the rigidity of the vehicle body decreases, and vibration or noise occurs in the vehicle 12, The steering stability performance of the vehicle 12 may deteriorate.
- the front bent portion 26 is provided with the reinforcing member 40. That is, in a state where each corner 43, 45, 47, 49 of the reinforcing member 40 is in contact with each corner 33, 35, 37, 39 in the front bent portion 26 of the front side member 14, the reinforcing member 40 is It is provided in the closed cross-sectional shape in the front side bending part 26 of the front side member 14 (refer FIG. 3).
- each closed cross-sectional shape is formed by the lower wall 32, the inner wall 34, the outer wall 36, the upper wall 38 of the front side member 14 and the wall portions 42, 44, 46, 48 of the reinforcing member 40. That is, the four closed cross-sectional shapes are composed of two opposing curved surfaces, and the rigidity (strength) of each closed cross-sectional shape itself is improved.
- the four closed cross-sectional shapes formed by the front side member 14 and the reinforcing member 40 cause the lower wall 32, the inner wall 34, the outer wall 36, Since the stress applied to the upper wall 38 and each of the wall portions 42, 44, 46, 48 can be dispersed and the resistance against elastic deformation toward the upper side of the front side member 14 can be improved, A decrease in rigidity can be suppressed.
- a substantially flat reinforcing rib 52 that integrally connects at least the wall portion 42 and the wall portion 48 is provided over the entire longitudinal direction of the reinforcing member 40.
- the orientation of the fibers F in each of the wall portions 42, 44, 46, 48 and the reinforcing rib 52 is the extending direction of the reinforcing member 40 (see FIG. 2), the tensile force generated in the wall portion 48 in particular. A strong reaction force against the force can be generated.
- a collision load is input to the front end portion of the front side member 14 via a front bumper reinforcement or a crash box (not shown).
- the front bent portion 26 and the rear bent portion 28 are portions that are bent (or curved) in advance, and the maximum bent portion (or the maximum curvature portion) is a deformation starting point.
- the reinforcing member 40 is provided at the front bent portion 26 and the rear bent portion 28 (maximum bent portion) of the front side member 14, and the strength (rigidity) of the elastic deformation region and the plastic deformation region is provided. ) Has been improved.
- each closed cross-sectional shape is formed by the lower wall 32, the inner wall 34, the outer wall 36, the upper wall 38 of the front side member 14, and the wall portions 42, 44, 46, 48 of the reinforcing member 40.
- the four closed cross-sectional shapes are each formed of a curved surface, and the rigidity (strength) of each closed cross-sectional shape itself is improved.
- the reinforcing member Due to the four closed cross-sectional shapes constituted by 40, the resistance to elastic deformation and plastic deformation of the front side member 14 toward the upper side or the lower side can be greatly improved.
- the bending deformation (plastic deformation) starting from the front bent portion 26 and the rear bent portion 28 (maximum bent portion) of the front side member 14 can be delayed and effective. Can be suppressed (relaxed). Even after bending deformation (plastic deformation), cross-sectional collapse at the front bent portion 26 and the rear bent portion 28 of the front side member 14 can be suppressed by the strength of the four closed cross-sectional shapes.
- a substantially flat reinforcing rib 52 that integrally connects at least the wall portion 42 and the wall portion 48 is provided over the entire longitudinal direction of the reinforcing member 40. Therefore, it is possible to further improve the yield strength against elastic deformation and plastic deformation of the front side member 14 (reinforcing member 40) upward or downward.
- the orientation of the fibers F in each of the wall portions 42, 44, 46, 48 and the reinforcing rib 52 is defined as the extending direction of the reinforcing member 40, that is, the extending direction (longitudinal direction) of the front side member 14, Also along the input direction, it is possible to further improve the proof strength against elastic deformation and plastic deformation of the front side member 14 (reinforcing member 40) upward or downward.
- the front side member 14 on the front side of the vehicle body with respect to the front bent portion 26 can be efficiently compressed and deformed (collapsed) in its axial direction (vehicle body longitudinal direction).
- the collision load can be efficiently absorbed by the straight portion of the front side member 14 (the amount of energy absorption can be increased).
- the reinforcing member 40 having such a configuration can locally and efficiently reinforce the front bent portion 26 and the rear bent portion 28 where the occurrence of bending deformation is predicted. It is possible to suppress or prevent the compression deformation failure and the decrease in the collision safety performance due to the increase in the amount of bending deformation of the front bent portion 26 and the rear bent portion 28.
- the reinforcing member 40 is made of fiber reinforced resin and is reduced in weight, it can improve fuel consumption and reduce exhaust gas as compared with a structure reinforced with sheet metal or the like. it can.
- this reinforcing member 40 since it can be easily adopted using existing equipment and processes, even if the reinforcing member 40 is provided in the front side member 14, a decrease in productivity is suppressed. Is done. In addition, the effect
- the corner portions 43, 45, 47, and 49 of the reinforcing member 40 are respectively connected to the lower wall of the front side member 14.
- the reinforcing member 40 of the first embodiment is rotated counterclockwise so as to contact (or be joined by an adhesive) the substantially central portion in the left-right direction or the substantially central portion in the vertical direction of the outer wall 36, the inner wall 34, and the upper wall 38. And rotated 90 degrees.
- each of the wall portions 42, 44, 46, 48 of the reinforcing member 40 is opposed to each of the corner portions 35, 33, 39, 37 of the front side member 14, so that a plurality of (in this case, four) closed sections are provided.
- the shape is formed.
- the corner portions 43 and 49 that are in contact with (or joined to) the lower wall 32 and the upper wall 38 and that face each other are integrally connected by the reinforcing rib 52.
- the corner portions 43, 45, 47, and 49 which are the ridge portions of the reinforcing member 40 that is hardly deformed with respect to the load to be bent and deformed, are the lower wall 32, outer wall 36, and inner wall 34 of the front side member 14. If the corners 33, 35, 37, 39, which are the ridge portions of the front side member 14, are included in the four closed cross-sectional shapes facing the upper wall 38, the four closed cross-sectional shapes are included.
- the rigidity (strength) of itself can be further improved.
- the front side member 14 (reinforcing member 40) against bending deformation and crushing deformation in the vertical direction and the horizontal direction. Therefore, the bending deformation (plastic deformation) of the front side member 14 with the front bent portion 26 and the rear bent portion 28 (maximum bent portion) as the deformation starting point can be further suppressed, and the cross-sectional collapse thereof can be further suppressed. it can.
- the lower wall 32, the inner wall 34, the outer wall 36, and the upper wall 38 of the front side member 14 are respectively located on the outer side surfaces 32A, 34A, 36A, 38A. It does not have to be formed in a curved shape that bulges. Further, the wall surfaces 42A, 44A, 46A, 48A of the wall portions 42, 44, 46, 48 of the reinforcing member 40 may not be formed in a curved shape that is recessed inward of the front side member 14.
- 48A a plurality of (in this case, four) partition ribs 54 that are brought into close contact with or in contact with at least the corners 35, 33, 39, 37 of the front side member 14 are integrally provided at a predetermined position of 48A. .
- each partition rib 54 has a closed cross-sectional shape composed of wall portions 42, 44, 46, 48 and corner portions 35, 33, 39, 37 as viewed from the longitudinal direction of the front side member 14.
- the wall portions 42A, 44A, 46A, 48A of the wall portions 42, 44, 46, 48 are erected vertically.
- each partition rib 54 suppresses or prevents cross-sectional deformation (concave deformation so as to approach each wall surface 42A, 44A, 46A, 48A) at each corner 35, 33, 39, 37 of the front side member 14. Can do.
- the vehicle 12 collides with the front.
- the bending deformation starting from the maximum bent portion P of the front side member 14 generated by the input of the load can be more effectively suppressed or prevented.
- the “maximum bent portion (or maximum curvature portion)” in the present embodiment includes a position slightly shifted in the front-rear direction from the accurate maximum bent portion (or maximum curvature portion).
- Each of the illustrated ribs 54 is provided at one location in the longitudinal direction of the front side member 14.
- the partition ribs 54 are spaced at a predetermined interval (eg, at regular intervals) at a plurality of locations in the longitudinal direction of the front side member 14. ) May be provided.
- the strength (rigidity) of the reinforcing member 40 is improved in proportion to the number of the partition ribs 54.
- the end faces at the peripheral edge of each partition rib 54 may be joined to the respective wall surfaces 32A, 34A, 36A, and 38A by an adhesive, and the joined side can further improve the resistance to bending deformation of the front side member 14.
- each partition rib 54 is along the direction from the wall surfaces 42A, 44A, 46A, 48A of the wall portions 42, 44, 46, 48 to the corner portions 35, 33, 39, 37. Yes. Thereby, the strength (rigidity) of each partition rib 54 is improved, and the cross-sectional deformation is further suppressed or prevented.
- the plate thickness of each partition rib 54 is not particularly limited, but may be the same as the plate thickness of each wall portion 42, 44, 46, 48 or the thickness of the reinforcing rib 52, for example.
- the reinforcing member 40 is divided into a first member 56 and a second member 58 that form a closed cross-sectional shape by being fitted to each other. Yes. More specifically, the first member 56 has wall portions 42 and 44 and reinforcing ribs 52. The second member 58 has wall portions 46 and 48.
- first member 56 and the second member 58 have a fitting mechanism 60 at each corner 45, 47, 49.
- the upper end portion (free end portion) of the reinforcing rib 52 in the first member 56 has a substantially isosceles triangle shape (or a substantially equilateral triangle shape) when viewed from the longitudinal direction of the front side member 14. )
- a recessed fitting portion 64 that opens downward is formed at the corner portion 49 of the second member 58.
- the width of the opening 65 formed in the lower end portion of the fitted portion 64 (the interval in the direction orthogonal to the longitudinal direction of the reinforcing member 40) is the maximum width (the reinforcing member 40 of the reinforcing member 40). (Thickness in a direction perpendicular to the longitudinal direction)). Therefore, as the fitting portion 62 enters the fitted portion 64 from below, the lower end portion of the fitted portion 64 forming the opening 65 is elastically deformed to receive the fitting portion 62, and then restored. By doing so, the fitting portion 62 is locked so as not to come off.
- the corner 47 of the first member 56 is formed with a recessed fitting portion 66 that opens upward, and is formed on the inner wall in the fitting portion 66.
- the claw portion 67 protruding downward is integrally formed.
- a claw portion 68 protruding upward as a fitting portion is formed integrally with the lower end portion (free end portion) of the wall portion 48 of the second member 58.
- the claw portion 68 is inserted into the fitted portion 66 from above and is locked to the claw portion 67, the claw portion 68 is prevented from being detached from the fitted portion 66.
- the same to-be-fitted part 66 (claw part 67) is formed also in the corner
- the fitting portions 64 and 66 are filled with the adhesive J in advance, and the fitting portion 62 and the claw portion 68 are connected to the fitting portion 64 and the covered portion.
- the fitting portion 66 (claw portion 67)
- the fitting portion 62 and the claw portion 68 are joined to the fitted portion 64 and the fitted portion 66. Also good.
- the strength (rigidity) of each corner 45, 47, 49 of the reinforcing member 40 can be further improved.
- the first member 56 is arranged in advance in the under member 22 by joining the corners 43, 45, 47 to the lower wall 32, the outer wall 36, and the inner wall 34 with an adhesive.
- the second member 58 is arranged in advance in the upper member 24 by joining the corner portion 49 to the upper wall 38 with an adhesive.
- the first member 56 and the second member 58 are fitted together to form the reinforcing member 40 having a closed cross-sectional shape. That is, according to the fourth embodiment, the assembling property of the reinforcing member 40 with respect to the front side member 14 is improved, and the decrease in productivity is further suppressed.
- the reinforcing member 50 according to the fifth embodiment is different in the orientation of the fibers F from the reinforcing member 40 according to the first to fourth embodiments. That is, this reinforcing member 50 is a bulk that locally reinforces only the maximum bent portion (or the maximum curvature portion) of the front side member 14 formed in a closed cross-sectional shape, with the orientation of the fibers F along the circumferential direction. It can be used as a head (partition wall).
- the reinforcing member 50 is injection-molded by injecting a fiber reinforced resin material from a gate of a mold (not shown) corresponding to, for example, the center portion of the corner portion 49 in the longitudinal direction of the vehicle body. Thereby, the orientation of the fiber F in each wall part 42, 44, 46, 48 is substantially along the circumferential direction (direction orthogonal to the longitudinal direction of the front side member 14).
- the reinforcing member 50 may be formed in a cylindrical shape as shown in FIG. 12A, or formed in a shape in which the cylindrical interior is closed by the thin plate portion 51 as shown in FIG. 12B. May be.
- the reinforcing member 50 having the thin plate portion 51 can further enhance the reinforcing effect.
- the reinforcing member 50 may be provided with reinforcing ribs 52 as in the first to fourth embodiments.
- the reinforcing member 40 in the first to fourth embodiments is not provided with the reinforcing rib 52 but the thin plate portion 51 at the maximum bending portion or at a predetermined interval in the longitudinal direction (the maximum bending portion is not provided). It may be configured to include a plurality.
- the skeleton structure 10 of the vehicle 12 according to the present embodiment has been described based on the drawings, the skeleton structure 10 of the vehicle 12 according to the present embodiment is not limited to the illustrated one, and The design can be changed as appropriate without departing from the scope of the invention.
- the front side member 14 and the reinforcing members 40 and 50 are not limited to those illustrated in the illustrated rectangular tube shape, and are formed in a polygonal tube shape or a cylindrical shape other than the rectangular tube shape. Also good.
- the reinforcing members 40 and 50 are not limited to the configuration provided in the front side member 14, and can be provided in all skeleton members that are predicted to bend and deform when the vehicle 12 collides. . That is, the reinforcing members 40 and 50 are not limited to a configuration provided in a portion that is previously bent (or curved) among the skeleton members having a closed cross-sectional shape that constitutes the skeleton of the vehicle 12.
- a straight center cross member (not shown) with a substantially hat-shaped cross section that forms a closed cross-sectional shape with a floor panel (not shown), or a substantially hat-shaped cross section as shown in FIG.
- the inner panel and the outer panel thus formed have a closed cross-sectional shape, and the reinforcing members 40 and 50 may be provided inside the center pillar 13 extending substantially straight in the vertical direction of the vehicle body.
- the reinforcing members 40 and 50 may be configured to be provided by insert molding or prepreg molding in the closed cross-sectional shape of the front side member 14 or the center pillar 13. Further, when the reinforcing members 40 and 50 (including the reinforcing ribs 52 and the partition ribs 54) are molded, for example, the fiber sheet is set in the mold in advance so that the orientation of the fibers F is in a desired direction, and then the resin. You may make it shape
- the joining of the reinforcing members 40 and 50 to the front side member 14 is not limited to the adhesive, and for example, a configuration may be adopted in which the members are joined by bolts and nuts (not shown). In this case, you may make it the structure which provides a nut in advance to the reinforcement members 40 and 50 by insert molding.
- each embodiment is mutually applicable.
- the partition ribs 54 in the third embodiment may be erected on the wall portions 42, 44, 46, 48 in the first member 56 and the second member 56 in the fourth embodiment.
- the reinforcing member 40 according to the first embodiment may be configured to be divided and fitted into the first member 56 and the second member 58 as in the fourth embodiment.
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Abstract
Description
まず、第1実施形態に係る車両12の骨格構造10について説明する。図1に示されるように、車両12の前部における両側部には、車体前後方向を長手方向とする閉断面形状の骨格部材としての左右一対のフロントサイドメンバ14が配設されている。各フロントサイドメンバ14の長手方向中途部には、それぞれ傾斜部(キック部)14Aが形成されており、各フロントサイドメンバ14は、各傾斜部14Aよりも車体前方側が車体後方側よりも所定高さ高い位置(高位)で、車体前後方向に延在するようになっている。
次に、第2実施形態に係る車両12の骨格構造10について説明する。なお、上記第1実施形態と同等の部位には、同じ符号を付して詳細な説明(共通する作用も含む)は適宜省略する。
次に、第3実施形態に係る車両12の骨格構造10について説明する。なお、上記第1実施形態及び第2実施形態と同等の部位には、同じ符号を付して詳細な説明(共通する作用も含む)は適宜省略する。
次に、第4実施形態に係る車両12の骨格構造10について説明する。なお、上記第1実施形態~第3実施形態と同等の部位には、同じ符号を付して詳細な説明(共通する作用も含む)は適宜省略する。
最後に、第5実施形態に係る車両12の骨格構造10について説明する。なお、上記第1実施形態~第4実施形態と同等の部位には、同じ符号を付して詳細な説明(共通する作用も含む)は適宜省略する。
Claims (11)
- 複数の第1壁部と複数の第1角部とを有する閉断面形状に形成され、車両の骨格を構成する骨格部材と、
複数の第2壁部と複数の第2角部とを有する閉断面形状に形成されるとともに、前記複数の第2角部が前記複数の第1壁部又は前記複数の第1角部にそれぞれ接触して前記骨格部材の閉断面形状内に配置され、前記複数の第2壁部が前記複数の第1壁部又は前記複数の第1角部とそれぞれ対向することで複数の閉断面形状を形成する繊維強化樹脂製の補強部材と、
を備えた車両の骨格構造。 - 前記複数の第1壁部又は前記複数の第1角部とそれぞれ対向する前記複数の第2壁部の壁面は、前記骨格部材の長手方向から見た断面視で、前記骨格部材の内方側へ凹む曲面形状に形成されている請求項1に記載の車両の骨格構造。
- 前記複数の第2壁部とそれぞれ対向するか、又は前記複数の第2角部がそれぞれ接触する前記複数の第1壁部の壁面は、前記骨格部材の長手方向から見た断面視で、前記骨格部材の外方側へ膨らむ曲面形状に形成されている請求項1又は請求項2に記載の車両の骨格構造。
- 前記補強部材の閉断面形状内に、互いに対向する前記第2壁部同士又は前記第2角部同士を連結する補強リブが設けられている請求項1~請求項3の何れか1項に記載の車両の骨格構造。
- 前記複数の第1角部とそれぞれ対向する前記複数の第2壁部の壁面に、前記骨格部材の長手方向から見て、少なくとも前記複数の第1角部にそれぞれ近接又は当接させる隔壁リブが設けられている請求項1~請求項4の何れか1項に記載の車両の骨格構造。
- 前記補強部材における繊維の配向は、前記骨格部材の長手方向に沿っている請求項1~請求項5の何れか1項に記載の車両の骨格構造。
- 前記隔壁リブにおける繊維の配向は、前記第2壁部から前記第1角部に向かう方向に沿っている請求項5に記載の車両の骨格構造。
- 前記補強部材は、互いに嵌合されることで閉断面形状を形成する第1部材と第2部材とで構成されている請求項1~請求項7の何れか1項に記載の車両の骨格構造。
- 閉断面形状に形成され、車両の骨格を構成する骨格部材と、
閉断面形状に形成されるとともに、前記骨格部材の壁部又は角部に接触して前記骨格部材の閉断面形状内に配置され、前記骨格部材とで複数の閉断面形状を形成する繊維強化樹脂製の補強部材と、
を備えた車両の骨格構造。 - 前記骨格部材は、屈曲部を有しており、
前記隔壁リブは、前記屈曲部に対応する部位に設けられている請求項5又は請求項7に記載の車両の骨格構造。 - 前記骨格部材の長手方向から見た断面視で、
前記複数の第1壁部の壁面が前記骨格部材の外方側へ膨らむ曲面形状に形成されるとともに、前記複数の第1壁部とそれぞれ対向する前記複数の第2壁部の壁面が前記骨格部材の内方側へ凹む曲面形状に形成され、
前記第2壁部の壁面の曲率が、前記第1壁部の壁面の曲率と同じか、それよりも大きくされている請求項1に記載の車両の骨格構造。
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US15/030,288 US9868465B2 (en) | 2013-11-01 | 2014-10-06 | Vehicle frame structure |
CN201480058692.3A CN105745145B (zh) | 2013-11-01 | 2014-10-06 | 车辆的框架结构 |
DE112014004960.3T DE112014004960T5 (de) | 2013-11-01 | 2014-10-06 | Fahrzeugrahmenstruktur |
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US11312423B2 (en) | 2017-11-15 | 2022-04-26 | Sika Technology Ag | Device for reinforcing a structural element |
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JP7107055B2 (ja) * | 2018-07-20 | 2022-07-27 | 日本製鉄株式会社 | 車両用構造部材 |
JP6733848B1 (ja) * | 2018-10-24 | 2020-08-05 | 日本製鉄株式会社 | 自動車構造部材 |
JP2020117059A (ja) * | 2019-01-23 | 2020-08-06 | トヨタ自動車株式会社 | 車体構造部材 |
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