CN110816667A - Vehicle front structure - Google Patents
Vehicle front structure Download PDFInfo
- Publication number
- CN110816667A CN110816667A CN201910574773.3A CN201910574773A CN110816667A CN 110816667 A CN110816667 A CN 110816667A CN 201910574773 A CN201910574773 A CN 201910574773A CN 110816667 A CN110816667 A CN 110816667A
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- vehicle
- cross member
- pair
- disposed
- width direction
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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
- B62D21/152—Front or rear frames
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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
-
- 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
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
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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)
Abstract
The invention provides a vehicle front structure capable of suppressing front overhang and improving driving stability. A rear cross member (36) of the suspension member (30) is formed in a U-shape that opens toward the vehicle upper side when viewed from the front of the vehicle, and an upper portion (36A) is disposed so as to be spaced apart from a drive shaft (54) toward the vehicle rear side when viewed from the side of the vehicle, and a lower portion (36B) is disposed so as to be spaced apart from the drive shaft (54) toward the vehicle lower side. A part of the motor (52) is disposed between a pair of left and right side portions (36S) of the rear cross member (36) and on the vehicle rear side of the drive shaft (54) in a vehicle side view.
Description
Technical Field
The present invention relates to a vehicle front structure.
Background
A vehicle front structure provided with a suspension member is known and disclosed in, for example, japanese patent No. 4247903, japanese patent No. 6299724, japanese patent application laid-open No. 11-222152, and japanese patent application laid-open No. 2007-302147. For example, japanese patent No. 4247903 discloses a vehicle body frame structure including a front sub-frame that supports a drive system component including a power source, a steering component including a steering gear box, and a traveling component including a front suspension on the vehicle body side. In the vehicle front structure having this structure, the power source is an engine and the engine is large, and therefore the steering gear box is disposed on the vehicle rear side of the engine.
Disclosure of Invention
Problems to be solved by the invention
However, in this configuration, since the engine as a heavy object is disposed on the vehicle front side of the drive shaft, the front overhang becomes long, and this is disadvantageous in terms of driving stability. On the other hand, the same applies to the case where the power source is a motor instead of the engine, and although the motor is smaller than the engine, there is still room for further improvement.
The invention provides a vehicle front structure capable of suppressing front overhang and improving driving stability.
Means for solving the problems
A vehicle front structure according to a first aspect of the present invention includes: a pair of left and right front side members that are disposed on the vehicle width direction outer side of a motor in a vehicle front portion on which the motor and a drive shaft are mounted for driving a front wheel, and that extend in the vehicle front-rear direction; a suspension member including a pair of left and right side members fixed to the pair of left and right front side members and extending in a vehicle front-rear direction, a front cross member connecting the pair of left and right side members to each other, and a rear cross member connecting the pair of left and right side members to each other on a vehicle rear side of the front cross member, the pair of left and right side members being formed as metal extruded products, the front cross member and the rear cross member being formed as cast products, a vehicle body attachment for attachment to the front side member and a lower arm attachment portion to which a suspension lower arm is attached being integrally formed on each of the front cross member and the rear cross member, the rear cross member being formed in a U-shape that opens to a vehicle upper side when viewed from a front of the vehicle, and a motor disposed between the pair of right and left side portions of the rear cross member and on the vehicle rear side of the drive shaft in a vehicle side view, wherein a part of the motor is disposed between the pair of right and left side portions of the rear cross member.
According to the above configuration, since the side member of the suspension member is a metal extrusion molded product, ductility is higher than that of a cast product, and plastic deformation is easily performed. Therefore, at the time of a frontal collision of the vehicle, the side member is favorably deformed in addition to the front side member, and the collision energy can be efficiently absorbed. On the other hand, since the front cross member and the rear cross member of the suspension member are cast products, the rigidity can be improved as compared with the case of an extruded product. Further, since the vehicle body mount and the lower arm mounting portion are integrally formed on the front cross member and the rear cross member, respectively, the component structure can be simplified and the number of components can be suppressed. Further, since the front cross member and the rear cross member are both made of cast products and the lower arm mounting portions are integrally formed on these members, the acting point rigidity of the suspension member with respect to the input from the suspension lower arm is high. Thereby, the driving stability is improved.
Here, the rear cross member is formed in a U shape that opens toward the vehicle upper side when viewed from the front of the vehicle, and the upper portion is disposed so as to be away from the drive shaft toward the vehicle rear side when viewed from the side of the vehicle, and the lower portion is disposed so as to be away from the drive shaft toward the vehicle lower side. Further, a part of the motor is disposed between the pair of left and right side portions of the rear cross member and on the vehicle rear side of the drive shaft in a vehicle side view. In this way, by disposing the motor as a heavy object on the vehicle rear side of the drive shaft, the forward overhang is suppressed and the driving stability is improved.
A vehicle front structure according to a second aspect of the present invention is the vehicle front structure according to the first aspect, wherein the vehicle body attachment piece and the lower arm attachment portion are formed at a portion on both ends in the vehicle width direction of the front cross member and on an inner side in the vehicle width direction than the side member, and at a portion on both ends in the vehicle width direction of the rear cross member and on an outer side in the vehicle width direction than the side member, respectively.
According to the above configuration, the vehicle body mount and the lower arm mounting portion integrally formed on the front cross member as a cast product are provided at the vehicle width direction inner side of the side member on both end portions of the front cross member in the vehicle width direction. Therefore, when a load from the suspension lower arms is input to the portions of the front cross member that are on the vehicle width direction inner side than the side members on both end portions sides in the vehicle width direction, the load is supported by the front side member with deformation of the front cross member suppressed. Further, the vehicle body mount and the lower arm mounting portion integrally formed on the rear cross member as a cast product are provided at positions on both end portions sides in the vehicle width direction of the rear cross member and on the outer side in the vehicle width direction than the side members, respectively. Therefore, when a load from the suspension lower arms is input to the rear cross member at the vehicle width direction outer side than the side members at both end portions side in the vehicle width direction, the load is supported by the front side member with deformation of the rear cross member suppressed. In this way, since the rigidity is high with respect to the input from the suspension lower arm, the steering stability is further improved.
Effects of the invention
As described above, according to the vehicle front structure of the present invention, there is an excellent effect that the front overhang can be suppressed and the driving stability can be improved.
Drawings
Fig. 1 is a bottom view of a portion on the left side of a vehicle showing a vehicle front structure according to an embodiment of the present invention, as viewed from the vehicle lower side.
Fig. 2 is a side view showing a vehicle front structure according to an embodiment of the present invention, as viewed from the left side.
Fig. 3 is a perspective view showing a suspension member applied to the vehicle front structure shown in fig. 1.
Detailed Description
A vehicle front structure according to an embodiment of the present invention will be described with reference to fig. 1 to 3. Note that arrow FR shown appropriately in these drawings indicates the vehicle front side, arrow UP indicates the vehicle upper side, arrow W indicates the vehicle width direction, and arrow OUT indicates the vehicle width direction outer side. In addition, an electric vehicle is applied as the vehicle of the present embodiment.
Fig. 1 shows a vehicle left side portion of the vehicle front structure according to the present embodiment in a bottom view as viewed from the vehicle lower side. The one-dot chain line CL in the figure indicates the vehicle width direction center. In addition, since the vehicle front structure according to the present embodiment is basically configured to be bilaterally symmetrical except for a part described below, the illustration of the right side of the vehicle is omitted in fig. 1. Fig. 2 shows a vehicle front structure according to the present embodiment in a side view as viewed from the left side. As shown in fig. 1 and 2, a first bumper reinforcement 12 (hereinafter simply referred to as "first bumper RF 12") is disposed on the front end side of the vehicle body front portion 10 with the vehicle width direction as the longitudinal direction. The first bumper RF12 has a closed cross-sectional structure extending in the longitudinal direction thereof.
Further, a pair of left and right Front side members (Front side members) 16 are disposed on the vehicle rear side with respect to a portion on the vehicle transverse direction outer side of the first bumper RF12 at both sides of the vehicle body Front portion 10 in the vehicle transverse direction. The pair of left and right front side members 16 are provided at the vehicle body front portion 10 in a left-right symmetrical manner, and extend in the vehicle front-rear direction and are slightly inclined outward in the vehicle width direction toward the vehicle front side as shown in fig. 1. The cross-sectional shape of the front side member 16 orthogonal to the longitudinal direction thereof is a closed cross-sectional structure having a substantially rectangular shape. As shown in fig. 2, a front end 18A of the baffle upper member 18 is connected to the upper surface side of the front side member 16 on the front end 16A side.
As shown in fig. 1 and 2, the rear end side of the Front side member 16 is joined to a Front side member rear (Front side member rear)22, and the Front side member rear 22 is joined to a dash panel (vehicle body Front wall) 24 shown in fig. 2. The dash panel 24 partitions and forms the motor chamber 10R and a vehicle compartment 90 located on the vehicle rear side of the motor chamber 10R.
A crash box 14 is provided between the first bumper RF12 and the front side member 16. As shown in fig. 1, the crush box 14 extends in the vehicle front-rear direction, and is slightly inclined toward the vehicle front side toward the vehicle width direction outer side. The crash box 14 is provided with a closed cross-sectional structure of a substantially rectangular shape in a cross-sectional shape orthogonal to the longitudinal direction thereof, and is widened outward in the vehicle width direction than the front end portion 16A of the front side member 16.
The front end portions 16A of the pair of left and right front side members 16 are coupled in the vehicle width direction by a cross member 20. The cross member 20 is arranged with the vehicle width direction as the longitudinal direction, and has a closed cross-sectional structure in which the cross-sectional shape orthogonal to the longitudinal direction is substantially rectangular. The front side member 16, the apron upper member 18 (see fig. 2), the crush box 14, and the cross member 20 are connected by a gusset, not shown. As indicated by the two-dot chain line X, a portion of the gusset connects a portion of the vehicle width direction outer end of the front end portion 16A side of the front side member 16 and a portion of the vehicle width direction outer end of the rear end portion 14B of the crush box 14.
As shown in fig. 1 and 2, a pair of left and right body mounts (also referred to as "front body mounts") 34M, which will be described later, of the suspension members 30 are fixed to the lower surface side of the front end portion 16A of the front side member 16. A pair of left and right vehicle body mounts (also referred to as "rear vehicle body mounts") 36M of the suspension member 30, which will be described later, are fixed to the lower surface side of the rear portion 16B of the front side member 16. Thus, the suspension member 30 is supported in a suspended state by the pair of left and right front side members 16.
In fig. 3, the suspension member 30 is shown in a perspective view. As shown in fig. 3, the suspension member 30 includes side members (side rails) 32 arranged in a pair at the left and right sides in the vehicle width direction, and a front cross member 34 and a rear cross member 36 arranged in a pair at the front and rear sides in the vehicle front-rear direction.
The pair of left and right side members 32 extend in the vehicle front-rear direction, and are inclined outward in the vehicle width direction toward the vehicle front side in a vehicle plan view, and are curved in a convex shape toward the vehicle width direction inward obliquely front side. The pair of left and right side members 32 are made of an aluminum alloy (metal in a broad sense) and are formed as an extrusion product having a substantially fixed rectangular closed cross-sectional shape by extrusion of an aluminum alloy material. As shown in fig. 1, the front end portion 32A of the side member 32 is located on the vehicle width direction outer side of the front side member 16, and the rear portion 32R is located on the vehicle width direction inner side of the front side member 16.
As shown in fig. 3, the front cross member 34 and the rear cross member 36 connect the pair of left and right side sills 32 to each other in the vehicle width direction. The front cross member 34 and the rear cross member 36 are made of a cast product (in other words, die-cast) of an aluminum alloy material. The rear cross member 36 is disposed on the vehicle rear side of the front cross member 34, is formed in a U shape that opens toward the vehicle upper side when viewed from the front of the vehicle, and includes a pair of left and right side portions 36S and a bottom portion 36T that connects lower end portions of the pair of left and right side portions 36S to each other.
The vehicle transverse direction end portions of the front cross member 34 are joined to each other with the front end portion 32A side of the side member 32 inserted. The overlapping portion where the vehicle width direction end portion of the front cross member 34 overlaps the front end portion 32A side portion of the side member 32 is joined together by arc welding. Further, a flange portion 36F that overlaps with the vehicle width direction outer side wall of the side member 32 is formed at a portion on the vehicle width direction end portion side of the rear cross member 36. The portions of the rear cross member 36 on the end portion side in the vehicle width direction are joined together by arc welding, for example, such that a portion of the flange portion 36F and the upper wall overlaps a portion of the portion 32R on the rear side of the side member 32.
A pair of left and right vehicle body mounts 34M for mounting to the front side member 16 (see fig. 1) constituting the vehicle body frame are integrally formed on the front cross member 34 at both end portions in the vehicle width direction and at positions further inward in the vehicle width direction than the side members 32. The vehicle body mount 34M is a cylindrical boss portion for fastening, and is fixed to the lower surface side of the front end portion 16A of the front side member 16 by a bolt (fastener in a broad sense) 26A shown in fig. 1. In the drawings, the outer shape of the head portion of the bolt 26A is simplified and is illustrated only by a two-dot chain line, and the inner periphery of the vehicle body mount 34M is illustrated in a state where the bolt 26A is seen in perspective.
Further, a pair of left and right lower arm mounting portions 34L are integrally formed on the front cross member 34 at portions on both end portions in the vehicle width direction and on the inner side in the vehicle width direction than the side members 32. In the present embodiment, the lower arm mounting portion 34L is set on the vehicle rear side of the vehicle body mount 34M, and is formed in a substantially U-shape that opens diagonally to the vehicle rear side toward the vehicle width direction outer side in a vehicle bottom view, and mounting holes (not shown) are formed through the pair of opposing wall portions. The lower arm mounting portion 34L is a portion to which a front lower arm 44A (simplified in the drawing and shown by a two-dot chain line) constituting a part of the suspension lower arm 44 is mounted via a bush 46A for vibration isolation.
As shown in fig. 3, a pair of left and right vehicle body mounts 36M for mounting to the front side member 16 (see fig. 1) are integrally formed on the rear cross member 36 at both end portions in the vehicle width direction and at positions further to the vehicle width direction outer side than the side members 32. The vehicle body mount 36M is provided as a cylindrical boss portion for fastening, which is set on the upper end side of the side portion 36S of the rear cross member 36, and is fixed to the lower surface side of the rear portion 16B of the front side member 16 by a bolt (fastener in a broad sense) 26B shown in fig. 1. In the drawings, the outer shape of the head portion of the bolt 26B is simplified and is illustrated only by a two-dot chain line, and the inner periphery of the vehicle body attachment 36M is illustrated in a state where the bolt 26B is seen in perspective.
Further, a pair of left and right lower arm mounting portions 36L are integrally formed on the rear cross member 36 at portions on both end portions sides in the vehicle width direction and on the outer side in the vehicle width direction than the side members 32. In the present embodiment, the lower arm mounting portion 36L is set on the vehicle front side of the vehicle body mount 36M, is formed in a substantially U shape that opens to the vehicle width direction outer side in a vehicle bottom view, and has mounting holes 36L1 (see fig. 3) formed through the pair of opposing wall portions. The lower arm mounting portion 36L is a portion to which a rear lower arm 44B (simplified in the drawing and shown by a two-dot chain line) constituting a part of the suspension lower arm 44 is mounted via a bush 46B for vibration isolation.
As shown in fig. 3, a lower side member (Lowerside member)40 is coupled to each front end portion 32A of the pair of left and right side members 32. The lower side member 40 is disposed on the vehicle lower side of the crush box 14 (see fig. 1 and 2), extends in the vehicle front-rear direction, and is slightly inclined toward the vehicle front side toward the vehicle width direction outer side. The rear end portion 40B side of the lower side member 40 is joined by arc welding in a state of being inserted into the vehicle width direction end portion of the front cross member 34. The lower side member 40 is made of an aluminum alloy (broadly, metal), and is formed into an extrusion molding having a substantially constant rectangular closed cross-sectional shape by extrusion molding of the aluminum alloy material.
A portion on the end portion side in the longitudinal direction of the second bumper reinforcement 42 (hereinafter simply referred to as "second bumper RF 42") disposed with the vehicle width direction as the longitudinal direction is fixed to the front end portion 40A of each lower side member 40. The second bumper RF42 has a closed cross-sectional structure extending in the longitudinal direction thereof. As shown in fig. 1 and 2, the second bumper RF42 is disposed on the vehicle lower side of the first bumper RF 12. In fig. 1, the front end of the second bumper RF42 is shown overlapping the front end of the first bumper RF 12.
As shown in fig. 3, a coupling member 38 is fastened to the rear end portions 32B of the pair of left and right side members 32 by bolts 37 (see fig. 1). The connecting member 38 is made of an aluminum alloy (broadly, metal), and is an extrusion-molded product formed by extrusion molding of an aluminum alloy material. The connecting member 38 includes: the pair of left and right side wall portions 38A, the rear wall portion 38B that connects rear ends of the pair of left and right side wall portions 38A to each other in the vehicle width direction, and the front wall portion 38C that connects portions on front end sides of the pair of left and right side wall portions 38A to each other in the vehicle width direction. In the coupling member 38, the respective intersections of the side wall portions 38A and the front wall portion 38C and the vehicle transverse direction intermediate portion of the rear wall portion 38B are connected by the reinforcing ribs 38D. As shown in fig. 2, the coupling member 38 is attached to a case front end portion of the battery cell (battery pack) 94 disposed on the vehicle rear side thereof. Further, the battery unit 94 is mounted on the lower side of the vehicle floor 92.
A motor unit 50 is disposed on the rear upper side of the suspension member 30, and the motor unit 50 is supported by the suspension member 30. That is, as an example, the motor unit 50 is mounted on the vehicle body front portion 10 and is disposed in the vicinity of the front side of the dash panel 24 by attaching the front side and the left and right rear side portions to the suspension member 30 via motor mounts (not shown). The motor unit 50 includes: a motor 52 serving as a driving source for driving the front wheels 60; a speed reducer (not shown) coupled to an output shaft of the motor 52; and a drive shaft 54 coupled to a final gear of the speed reducer to transmit a driving torque to the front wheels 60. The motor 52 and the drive shaft 54 are disposed with the vehicle width direction as the axial direction. The motor 52, all of the speed reducer, and a part of the drive shaft 54 are housed in a case 50C of the motor unit 50. In the drive shaft 54, a portion protruding from the housing 50C of the motor unit 50 extends outward in the vehicle width direction. In addition, the motor unit 50 is not necessarily bilaterally symmetrical.
Here, the rear cross member 36 of the suspension member 30 described above is arranged such that the upper portion 36A is spaced apart from the drive shaft 54 toward the vehicle rear side and the lower portion 36B is spaced apart from the drive shaft 54 toward the vehicle lower side in a vehicle side view. In other words, the rear cross member 36 is set so as to avoid the drive shaft 54. Further, a part of the motor 52 is disposed between the pair of left and right side portions 36S of the rear cross member 36 and on the vehicle rear side of the drive shaft 54 in a vehicle side view. Also, the front side member 16 described above is arranged at the vehicle width direction outer side of the motor 52.
Further, a steering gear box 56 (shown in fig. 1 and 2 in a simplified manner) is disposed on the vehicle front lower side of the motor 52 in a vehicle side view. The steering gear box 56 is a component part including a gear mechanism for EPS (Electric power steering), and is attached to the lower part 36B of the rear cross member 36 of the suspension member 30 via a bracket, not shown, as an example. Further, the lower arm mounting portion 34L set on the front side on the above-described suspension member 30 is set on the vehicle front side of the steering gear box 56. Further, the lower arm mounting portion 36L set on the rear side on the suspension member 30 is set on the vehicle rear side of the steering gear box 56. The side member 32 of the suspension member 30 is inclined toward the vehicle lower side toward the vehicle rear side through a space between the steering gear box 56 and the drive shaft 54 in a vehicle side view, and smoothly connects the front end portion 32A side to the rear end portion 32B side.
The lower end of an intermediate shaft 58 (not shown in fig. 1) is connected to the steering gear box 56 at a position in the vehicle width direction corresponding to the vehicle width direction center portion of the driver's seat (not shown in the drawings). The intermediate shaft 58 extends toward the vehicle rear upper side, passes through the dash panel 24 via the vehicle upper side of the drive shaft 54, reaches the vehicle interior 90 (vehicle compartment), and is connected to a steering shaft (not shown). Incidentally, since the motor 52 is smaller than the engine, the intermediate shaft 58 can be disposed even if the steering gear box 56 is disposed on the vehicle front side of the motor 52. Further, by disposing the steering gear box 56 on the vehicle front side of the motor 52, the drive shaft 54 can be disposed on the vehicle front side of the motor 52.
(action and Effect of the embodiment)
Next, the operation and effect of the above embodiment will be described.
At the time of a frontal collision of the vehicle, a collision load from the vehicle front side is input to the first bumper RF12 and the second bumper RF42 shown in fig. 1. Then, the collision load input to the first bumper RF12 is transmitted from the front side member 16 to the front side member rear member 22 via the crush box 14, and the collision load input to the second bumper RF42 is transmitted from the side member 32 to the connecting member 38 via the lower side member 40. At this time, the crash box 14 and the front side member 16 are plastically deformed, and the lower side member 40, the side member 32, and the connecting member 38 are plastically deformed, thereby effectively absorbing the crash energy.
In the present embodiment, since the lower side member 40, the side member 32, and the connecting member 38 are extruded products (members also understood as "ductile members") made of aluminum alloy, ductility is higher than that of a comparative structure in which the lower side member, the side member, and the connecting member are cast products, for example, and plastic deformation is more likely to occur than that of the comparative structure. Therefore, the lower side member 40, the side member 32, and the connecting member 38 are favorably deformed at the time of a frontal collision of the vehicle. On the other hand, since the front cross member 34 and the rear cross member 36 of the suspension member 30 are cast products, the rigidity can be improved as compared with the case of an extruded product. Thus, the suspension member 30 of the present embodiment contributes to improvement of the collision safety performance of the vehicle (in other words, excellent collision management can be performed).
Here, the rear cross member 36 is formed in a U shape that opens to the vehicle upper side in a vehicle front view, and the upper portion 36A is disposed so as to be separated to the vehicle rear side with respect to the drive shaft 54 and the lower portion 36B is disposed so as to be separated to the vehicle lower side with respect to the drive shaft 54 in a vehicle side view as shown in fig. 2. A part of the motor 52 is disposed between the pair of left and right side portions 36S of the rear cross member 36 and on the vehicle rear side of the drive shaft 54 in a vehicle side view. In this way, by disposing the motor 52 as a heavy object on the vehicle rear side of the drive shaft 54, the forward overhang is suppressed and the driving stability is improved.
In the present embodiment, as shown in fig. 1 and the like, a vehicle body mount 34M and a lower arm attachment portion 34L are integrally formed on a front cross member 34 that is a cast product made of an aluminum alloy material. Similarly, a vehicle body mount 36M and a lower arm mounting portion 36L are integrally formed on the rear cross member 36, which is a cast product made of an aluminum alloy material. Thus, by integrating (assembling) the components, the component structure can be simplified, the number of components can be reduced, and weight reduction can be achieved while achieving high rigidity (while improving the force application rigidity of each of the front cross member 34 and the rear cross member 36).
In the present embodiment, the vehicle body mount 34M and the lower arm mounting portion 34L integrally formed on the front cross member 34 as a cast product are provided at the vehicle width direction inner side of the side member 32 on both end portions of the front cross member 34 in the vehicle width direction. Therefore, when a load from the front lower arm 44A is input to the vehicle transverse direction inner side of the side member 32 on both end portions of the front cross member 34 in the vehicle transverse direction, the load is supported by the front side member 16 with deformation of the front cross member 34 suppressed. The vehicle body mount 36M and the lower arm mounting portion 36L that are integrally formed on the rear cross member 36 as a cast product are provided at positions on both end portions of the rear cross member 36 in the vehicle width direction and on the vehicle width direction outer side than the side member 32. Therefore, when a load from the rear lower arm 44B is input to a portion on the vehicle width direction outer side than the side member 32 on both end portions sides in the vehicle width direction of the rear cross member 36, the load is supported by the front side member 16 with deformation of the rear cross member 36 suppressed. In this way, since the rigidity is high with respect to the input from suspension lower arm 44, the steering stability can be improved even from this viewpoint.
As described above, according to the vehicle front structure of the present embodiment, the front overhang can be suppressed and the driving stability can be improved. Further, by suppressing the front overhang, in other words, by realizing the short overhang, the indoor space can be obtained widely with respect to the entire length of the vehicle, and the mounting capacity of the battery unit 94 can be increased.
(supplementary explanation of embodiment)
In addition, as a modification of the above embodiment, a structure may be adopted in which the front portions of the side members of the suspension members are positioned further inward in the vehicle width direction than the vehicle body mount (34M) on the front side and the lower arm mounting portion (34L) on the front side, respectively.
In the above embodiment, the suspension member 30 is made of an aluminum alloy, but may be made of other metals such as a magnesium alloy, for example.
In addition, the above-described embodiment and the above-described modification examples can be implemented by being appropriately combined.
Although one example of the present invention has been described above, the present invention is not limited to the above-described examples, and it is obvious that various modifications can be made without departing from the scope of the present invention.
Claims (7)
1. A vehicle front structure having:
a pair of left and right front side members that are disposed on the vehicle width direction outer side of a motor in a vehicle front portion on which the motor and a drive shaft are mounted for driving a front wheel, and that extend in the vehicle front-rear direction;
a suspension member including a pair of left and right side members fixed to the pair of left and right front side members and extending in a vehicle front-rear direction, a front cross member connecting the pair of left and right side members to each other, and a rear cross member connecting the pair of left and right side members to each other on a vehicle rear side of the front cross member,
the pair of left and right side members are formed as metal extruded members, the front cross member and the rear cross member are each formed as a cast product, and a vehicle body attachment member for attachment to the front side member and a lower arm attachment portion to which a suspension lower arm is attached are integrally formed on the front cross member and the rear cross member, respectively,
the rear cross member is formed in a U-shape that opens toward a vehicle upper side when viewed from a vehicle front side, and an upper portion is disposed so as to be separated toward a vehicle rear side with respect to the drive shaft when viewed from a vehicle side, and a lower portion is disposed so as to be separated toward a vehicle lower side with respect to the drive shaft,
a part of the motor is disposed between a pair of right and left side portions of the rear cross member and on a vehicle rear side of the drive shaft in a vehicle side view.
2. The vehicle front structure according to claim 1,
the vehicle body mount and the lower arm mounting portion are formed at a portion of the front cross member on both ends in the vehicle width direction and on an inner side in the vehicle width direction than the side member, and at a portion of the rear cross member on both ends in the vehicle width direction and on an outer side in the vehicle width direction than the side member.
3. The vehicle front structure according to claim 1 or claim 2,
a pair of right and left crash boxes extending in the vehicle longitudinal direction are fixed to front end portions of the pair of right and left front side members, respectively, and a first bumper reinforcement is disposed to connect front end portions of the pair of right and left crash boxes to each other,
a pair of left and right lower side members extending in the vehicle front-rear direction are fixed to front end portions of the pair of left and right side members, respectively, and a second bumper reinforcement is disposed to connect the front end portions of the pair of left and right lower side members to each other.
4. The vehicle front structure according to claim 3,
the front surface of the first bumper reinforcement and the front surface of the second bumper reinforcement are arranged to overlap each other when viewed from above the vehicle.
5. The vehicle front structure according to claim 1 or claim 2,
a battery unit is disposed on a vehicle rear side of rear end portions of the pair of left and right side members, and a coupling member that couples the rear end portions and a front end portion of the battery unit is disposed.
6. The vehicle front structure according to claim 1 or claim 2,
in a side view of the vehicle, a steering gear box including a steering gear mechanism is disposed on a vehicle front lower side of the motor, the lower arm mounting portion of the front cross member is disposed on a vehicle front side of the steering gear box, and the lower arm mounting portion of the rear cross member is disposed on a vehicle rear side of the steering gear box.
7. The vehicle front structure according to claim 6,
the pair of left and right side members are inclined toward the vehicle lower side through a space between the steering gear box and the drive shaft toward the vehicle rear side in a vehicle side view.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-148345 | 2018-08-07 | ||
| JP2018148345A JP7031528B2 (en) | 2018-08-07 | 2018-08-07 | Vehicle front structure |
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| CN110816667A true CN110816667A (en) | 2020-02-21 |
| CN110816667B CN110816667B (en) | 2022-04-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111196313A (en) * | 2018-10-30 | 2020-05-26 | 丰田自动车株式会社 | Vehicle front structure |
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| JP3350602B2 (en) * | 1994-10-14 | 2002-11-25 | 本田技研工業株式会社 | Car subframe |
| JP2004247903A (en) * | 2003-02-13 | 2004-09-02 | Matsushita Electric Ind Co Ltd | Telephone set and telephone set system |
| JP6410012B2 (en) * | 2014-04-17 | 2018-10-24 | スズキ株式会社 | Suspension frame structure |
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| JP2005289115A (en) * | 2004-03-31 | 2005-10-20 | Honda Motor Co Ltd | Vehicle body frame structure |
| CN201329793Y (en) * | 2008-12-31 | 2009-10-21 | 众泰控股集团有限公司 | Engine room arrangement structure for pure electric automobile |
| KR20130033748A (en) * | 2011-09-27 | 2013-04-04 | 주식회사 포스코 | Body assembly for electric vehicle |
| US20160347159A1 (en) * | 2014-01-21 | 2016-12-01 | Interactive Fully Electrical Vehicles S.R.L. | Electric-propulsion vehicle |
| CN104669995A (en) * | 2015-02-12 | 2015-06-03 | 苏州紫荆清远新能源汽车技术有限公司 | Front driving axle module of electric automobile and electric automobile |
| CN206374813U (en) * | 2016-12-26 | 2017-08-04 | 比亚迪股份有限公司 | Fore sub frame and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111196313A (en) * | 2018-10-30 | 2020-05-26 | 丰田自动车株式会社 | Vehicle front structure |
| CN111196313B (en) * | 2018-10-30 | 2022-05-10 | 丰田自动车株式会社 | Vehicle front structure |
| US11565578B2 (en) | 2018-10-30 | 2023-01-31 | Toyota Jidosha Kabushiki Kaisha | Vehicle front portion structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7031528B2 (en) | 2022-03-08 |
| CN110816667B (en) | 2022-04-01 |
| JP2020023244A (en) | 2020-02-13 |
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