WO2014017260A1 - 車両用サブフレーム - Google Patents
車両用サブフレーム Download PDFInfo
- Publication number
- WO2014017260A1 WO2014017260A1 PCT/JP2013/068114 JP2013068114W WO2014017260A1 WO 2014017260 A1 WO2014017260 A1 WO 2014017260A1 JP 2013068114 W JP2013068114 W JP 2013068114W WO 2014017260 A1 WO2014017260 A1 WO 2014017260A1
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- WIPO (PCT)
- Prior art keywords
- vehicle
- rib
- width direction
- ribs
- parallel
- Prior art date
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Classifications
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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
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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
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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
- B62D21/11—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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- 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
- B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
Definitions
- the present invention relates to a vehicle subframe in which a cast member is used for a part constituting a part of the frame and the entire frame.
- Vehicles usually have subframes below the left and right front skeletons, and a power source and left and right front suspensions are supported on the subframes.
- a subframe formed (cast) from an aluminum alloy is known in order to reduce the weight of the vehicle.
- the aluminum alloy subframe has a plurality of reinforcing ribs formed in a saw blade shape on the inner surface side of the subframe (see, for example, Patent Document 1).
- the cavity for reinforcement ribs can be utilized as a guide path for molten metal (molten metal).
- the plurality of reinforcing ribs provided in the subframe of Patent Document 1 are formed in a saw blade shape. Therefore, the cavity for the reinforcing rib formed by the mold also has a saw blade shape. For this reason, when the subframe is formed by casting, it is difficult to smoothly guide the molten metal of the aluminum alloy along the cavity for the reinforcing rib, and it is difficult to maintain a good hot water flow.
- the left side member provided on the left side of the vehicle and extending in the vehicle front-rear direction, the right side member provided on the right side of the vehicle and extending in the vehicle front-rear direction, and the left and right side members are connected.
- the cross member intersects with the plurality of radiation ribs extending radially so as to incline outward in the vehicle width direction from the rear end to the front end in the vehicle width direction central portion.
- a plurality of parallel ribs extending in parallel to the cross member, and the plurality of radiation ribs are provided on the outer side in the vehicle width direction from the center in the vehicle width direction of the cross member.
- Subframe vehicle inclination angle is set great as is provided.
- left and right radiation ribs provided outside in the vehicle width direction respectively extend toward the left and right suspensions.
- the plurality of radiation ribs have a rib height dimension smaller than that of the plurality of parallel ribs.
- the cross member in a state in which the vehicle subframe is provided in the vehicle, the cross member is bridged between the rear portion of the left side member and the rear portion of the right side member and the vehicle width.
- a cross upper portion formed in a curved shape so that a central portion in the direction protrudes upward, and the plurality of radiation ribs and the plurality of parallel ribs provided on the back surface, the cross upper portion being arranged in the vehicle width direction It has a cross recess formed in a concave shape toward the back surface so as to extend and a part of the center in the vehicle width direction becomes the lowest part.
- the cross member, the rear part of the left side member, and the rear part of the right side member are integrally formed of an aluminum alloy into a substantially U-shaped casting member in plan view. Furthermore, the cross member is provided with a plurality of radiating ribs, and the inclination angle of the plurality of radiating ribs is set to be larger as it is provided on the outer side in the vehicle width direction from the vehicle width direction center. Therefore, a plurality of radial ribs can be formed radially from the rear side to the front side of the left side member. In addition, the cross member was provided with a plurality of parallel ribs, and each parallel rib intersected each radiation rib.
- a space for forming a plurality of radiation ribs (radiation cavity) and a space for forming a plurality of parallel ribs (parallel cavity) are formed by the mold.
- the radiation cavity is formed radially from the rear part to the front part of the left side member. Further, the radiation cavity and the parallel cavity are formed to intersect each other. Thereby, a radiation cavity and a parallel cavity can be utilized as a guide path of molten metal (molten metal).
- the molten metal is smoothly guided by the radiation cavity or the parallel cavity.
- the hot water flow can be kept good.
- the molten metal can be suitably guided to the entire area of the cross member, the rear part of the left side member, and the rear part of the right side member (that is, the cast member).
- the left and right radiating ribs provided on the outer side in the vehicle width direction are extended toward the left and right suspensions, respectively. Therefore, the load input to the cross member from the left and right suspensions can be supported by the left and right radiation ribs provided on the outer side in the vehicle width direction. Thereby, the rigidity with respect to the load input from the left and right suspensions can be improved.
- the rib height dimension of the plurality of radiation ribs is made smaller than the rib height dimension of the plurality of parallel ribs. Therefore, the parallel cavity can be formed larger than the radiation cavity. As a result, the molten metal guided to the radiation cavity can be smoothly guided from the radiation cavity to the parallel cavity. Further, the molten metal guided to the parallel cavities can be smoothly guided toward the outside in the vehicle width direction to maintain a good hot water flow. Thereby, a molten metal can be suitably guided to the whole area of a cross member, a rear part of a left side member, and a rear part (casting member) of a right side member.
- the upper part of the cross of the cross member is formed in an upward curved shape while being mounted on the vehicle. Further, by forming the cross recess at the upper part of the cross in a concave shape toward the back surface, a part of the center part in the vehicle width direction of the upper part of the cross was set as the lowest part. Furthermore, a plurality of radiation ribs and parallel ribs were provided on the back surface of the upper part of the cloth. Therefore, the rib height dimension of the plurality of radiating ribs and parallel ribs can be kept small at the center in the vehicle width direction of the cross member.
- the space (recessed cavity) for forming the cross recessed part is formed in a state of communicating with the radiation cavity and the parallel cavity. Furthermore, the cavity height dimension of the radiation cavity and the parallel cavity communicating with the concave cavity can be kept small. As a result, the molten metal guided to the radiation cavity and the parallel cavity can be smoothly guided to the concave cavity to keep the molten metal flow well, so that the rear part of the cross member, the rear part of the left side member, and the rear part of the right side member The molten metal can be suitably guided over the entire area of the (casting member).
- FIG. 3 is an exploded perspective view showing a state in which a rear subframe is disassembled from the vehicle subframe of FIG. 2.
- FIG. 4 is a sectional view taken along line 4-4 of FIG.
- FIG. 4 is a plan view showing a rear subframe of FIG. 3.
- FIG. 4 is a bottom view showing a rear subframe of FIG. 3.
- FIG. 4 is a perspective view showing a state in which the rear subframe of FIG. 3 is viewed from below.
- FIG. 10 is a cross-sectional view taken along line 10-10 of FIG.
- A) is a top view explaining the example which shape
- (b) is a perspective view explaining the example which shape
- the vehicle 10 includes left and right front side frames (frame members) 11 and 12 that are provided on the left and right sides of the vehicle 10 and extend in the vehicle front-rear direction, and left and right front side frames 11 and 12.
- a power source (not shown) supported by the subframe 14 and left and right front suspensions 15 and 16 (the right front suspension 16 is shown in FIG. 8).
- a steering gear box 19 provided on the upper part of the sub-frame 14.
- the left front suspension 15 is supported by the left side member 23 of the subframe 14 via the left lower arm 17.
- the right front suspension 16 is supported by the right side member 26 of the subframe 14 via the right lower arm 18.
- the subframe 14 is formed in a rectangular shape by joining the front subframe 21 and the rear subframe 22.
- the front subframe 21 is provided on the left side of the vehicle 10 and has a main portion 23A of the left side member 23 that extends in the vehicle front-rear direction, and the main portion of the right side member 26 that is provided on the right side of the vehicle 10 and extends in the vehicle front-rear direction.
- 26A and a front cross member 31 that connects the front end portions 23a, 26a of the left and right side members 23, 26.
- the front subframe 21 is a steel member formed in a substantially U shape in plan view by the main portion 23A of the left side member 23, the main portion 26A of the right side member 26, and the front cross member 31.
- the rear subframe 22 includes a rear cross member 32, a rear upper part (rear part) 24 of the left side member 23, and a rear upper part (rear part) 27 of the right side member 26.
- the rear subframe 22 has a rear cross member 32, a rear upper portion 24 of the left side member 23 and a rear upper portion 27 of the right side member 26 in a plan view by low pressure casting using an aluminum alloy. It is a casting member formed in a substantially U shape.
- the rear upper part 24 of the left side member 23 is referred to as a left side rear upper part 24.
- the rear upper portion 27 of the right side member 26 is referred to as a right side rear upper portion 27.
- the left side rear upper portion 24 and the right side rear upper portion 27 are left and right symmetrical members, and hereinafter, the same reference numerals are given to the constituent members of the left and right side rear upper portions 24 and 27, and detailed description thereof will be omitted.
- the rear sub-frame 22 is formed in a substantially cross-sectional shape with a rear cross member 32, a left side rear upper part 24, and a right side rear upper part 27.
- the left side rear upper portion 24 has a left side outer peripheral portion 24a formed by a top portion 24b, an outer wall portion 24c, and an outer flange 24d.
- the right side rear upper portion 27 has a right side outer peripheral portion 27a formed by a top portion 27b, an outer wall portion 27c, and an outer flange 27d.
- the rear subframe 22 is formed in a substantially hat shape in cross section by the cross upper portion 36 (cross recess 37) of the rear cross member 32, the left side outer peripheral portion 24a, and the right side outer peripheral portion 27a.
- the steering gear box 19 is accommodated in the cross recess 37 of the cross upper part 36.
- the left side rear upper part 24 has a front end part 24e joined to the central part 23c of the left side member 23 and a lower end part 24f joined to the rear lower part 25 of the left side member 23. Yes. Moreover, the left side rear upper part 24 has the left reinforcement rib group 57 (refer FIG. 6) provided in the back surface 24i.
- the right side rear upper part 27 has a front end part 27 e joined to the center part 26 c of the right side member 26 and a lower end part 27 f joined to the rear lower part 28 of the right side member 26. Moreover, the right side rear upper part 27 has the right reinforcement rib group 67 (refer FIG. 6) provided in the back surface 27i.
- the rear cross member 32 is bridged over the central part 24h of the left side rear upper part 24 and the central part 27h of the right side rear upper part 27.
- the steering gear box 19 is housed in the cross recess 37 of the rear cross member 32 in the vehicle width direction, and the steering gear box 19 is covered with the cover 34. In this state, the steering gear box 19 and the cover 34 are attached to the rear cross member 32.
- the steering gear box 19 is a cylindrical case that houses a steering gear (not shown).
- a steering wheel is attached to a steering shaft 19 a extending from the steering gear box 19.
- the traveling direction of the vehicle 10 can be changed by operating the steering wheel.
- the rear cross member 32 includes a cross upper portion 36 spanning a central portion 24 h of the left side rear upper portion 24 and a central portion 27 h of the right side rear upper portion 27, and a cross upper portion 36. It has a rear wall portion 38 (see FIG. 9) provided at the rear end 36a and a front wall portion 39 (see FIG. 9) provided at the front end 36b of the cross upper portion 36.
- the rear cross member 32 has a radiation rib group 41 and left and right inclined ribs 47 and 48 provided on the back surface 36 c of the cross upper portion 36, and a parallel rib group 51 provided on the back surface 36 c of the cross upper portion 36.
- a left reinforcing rib group 57 is provided on the back surface 24 i of the left side rear upper part 24, and a right reinforcing rib group 67 is provided on the back surface 27 i of the right side rear upper part 27.
- the cross upper part 36 is formed in a substantially rectangular shape in plan view, and has a cross recessed part 37 (see also FIG. 9) extending in the vehicle width direction at the center in the vehicle front-rear direction.
- the cross upper portion 36 is formed in a curved shape so that the vehicle width direction center portion 36 d rises upward in a state where the sub frame 14 is provided in the vehicle 10.
- the cross concave portion 37 is formed in a concave shape toward the back surface 36c of the cross upper portion 36 so that a part 36e (see also FIG. 4) of the center portion 36d in the vehicle width direction of the cross upper portion 36 is the lowest portion. .
- the radiating rib group 41 is formed on the outer side in the vehicle width direction from the rear end (hereinafter referred to as the center rear end) 36f of the cross upper portion 36 in the vehicle width direction 36d toward the front end 36b.
- the radiating rib group 41 includes a left inner radiating rib 42, a right inner radiating rib 43, a left outer radiating rib 44, and a right outer radiating rib 45 as a plurality of radiating ribs.
- the left inner radiation rib 42 has an inclination angle ⁇ 1 on the left side in the vehicle width direction (outside in the vehicle width direction) from the rear wall portion 38 (rear end of the rear cross member 32) toward the front wall portion 39 (front end of the rear cross member 32). It extends radially to incline at.
- the right inner radiating rib 43 extends radially from the rear wall portion 38 toward the front wall portion 39 so as to be inclined at the inclination angle ⁇ 1 on the right side in the vehicle width direction (outside in the vehicle width direction).
- the left outer radiation rib 44 is provided on the left side in the vehicle width direction (the vehicle width direction outer side) from the left inner radiation rib 42.
- the left outer radiating rib 44 extends radially from the rear wall portion 38 toward the front wall portion 39 so as to incline at an inclination angle ⁇ 2 to the left in the vehicle width direction.
- the right outer radiating rib 45 is provided on the right side in the vehicle width direction (outer in the vehicle width direction) than the right inner radiating rib 43.
- the right outer radiating rib 45 extends radially from the rear wall portion 38 toward the front wall portion 39 so as to be inclined at an inclination angle ⁇ 2 on the right side in the vehicle width direction.
- the inclination angle ⁇ 2 of the left and right outer radiation ribs 44 and 45 is set larger than the inclination angle ⁇ 1 of the left and right inner radiation ribs 42 and 43. That is, the radiating rib group 41 is set to have a larger inclination angle as it is provided on the outer side in the vehicle width direction from the vehicle width direction center portion 36d of the rear cross member 32 (specifically, the upper cross portion 36).
- the rear end portions 42a to 45a of the radiation ribs 42 to 45 are formed at the central rear end 36f of the cross upper portion 36.
- the central rear end 36f of the cross upper portion 36 is a portion facing the gate of the mold when the rear subframe 22 is low-pressure cast. Therefore, when the rear subframe 22 is subjected to low pressure casting, molten metal (molten metal) of an aluminum alloy is guided from the die gate to the rear end portions 42a to 45a of the radiating rib group 41 (respective radiating ribs 42 to 45).
- the left outer radial rib 44 extends toward the rear arm 17 a of the left lower arm 17.
- the left lower arm 17 is a member that supports the left front suspension 15. Therefore, the load input to the rear cross member 32 from the left front suspension 15 through the rear arm 17a can be suitably supported by the left outer radiation rib 44.
- the right outer radiation rib 45 extends toward the rear arm 18a of the right lower arm 18.
- the right lower arm 18 is a member that supports the right front suspension 16. Therefore, the load input to the rear cross member 32 from the right front suspension 16 via the rear arm 18a can be suitably supported by the right outer radiation rib 45.
- left and right inclined ribs 47 and 48 are provided on the back surface 36 c of the cross upper portion 36.
- the left inclined rib 47 is formed in an inclined shape so as to intersect the left outer radiation rib 44.
- the right inclined rib 48 is formed in an inclined shape so as to intersect the right outer radiation rib 45.
- the parallel rib group 51 has a plurality of parallel ribs that intersect with the plurality of radiation ribs 42 to 45 and extend in parallel to the rear cross member 32.
- the parallel rib group 51 includes a front left parallel rib 52, a front right parallel rib 53, a center parallel rib 54, and a rear parallel rib 55 as a plurality of parallel ribs.
- the front left parallel rib 52 and the front right parallel rib 53 are provided in the same straight line extending in the vehicle width direction.
- the crossing angle ⁇ 3 of the plurality of radiation ribs 42 to 45 and the plurality of parallel ribs 52 to 55 is set to an obtuse angle.
- the front left parallel rib 52 extends from the left curved portion 39a of the front wall portion 39 (specifically, the front end 44a of the left outer radiation rib 44) to the left reinforcing rib group 57 toward the left side in the vehicle width direction.
- the front right parallel rib 53 extends from the central portion 39b of the front wall portion 39 (specifically, the front end 48a of the right inclined rib 48) to the right reinforcing rib group 67 toward the right side in the vehicle width direction, and the right outer radial rib. It intersects with the front end 45b of 45.
- the central parallel rib 54 is provided at a predetermined interval behind the front left parallel rib 52 and the front right parallel rib 53 in the vehicle body.
- the central parallel rib 54 is provided across the left reinforcing rib group 57 and the right reinforcing rib group 67 by extending in the vehicle width direction along the front wall portion 39 and the rear wall portion 38. Further, the central parallel rib 54 intersects the radiation rib group 41 (left and right inner radiation ribs 42 and 43, left and right outer radiation ribs 44 and 45) and left and right inclined ribs 47 and 48.
- the rear parallel rib 55 is provided between the central parallel rib 54 and the rear wall portion 38.
- the rear parallel rib 55 is provided across the left reinforcing rib group 57 and the right reinforcing rib group 67 by extending in the vehicle width direction along the front wall portion 39 and the rear wall portion 38. Further, the rear parallel rib 55 intersects the radiating rib group 41 (left and right inner radiating ribs 42 and 43, left and right outer radiating ribs 44 and 45), and left and right inclined ribs 47 and 48.
- the left reinforcing rib group 57 is provided on the back surface 24i of the left side rear upper portion 24, and includes an inner side rib 58, a front side rib 59, a central side rib 61, a rear side rib 62, a front inclined side rib 63, a central inclined side rib 64, and a rear inclined side rib 65.
- an inner side rib 58 is provided on the back surface 24i of the left side rear upper portion 24, and includes an inner side rib 58, a front side rib 59, a central side rib 61, a rear side rib 62, a front inclined side rib 63, a central inclined side rib 64, and a rear inclined side rib 65.
- the inner side rib 58 is formed near the left end portion 32 a of the rear cross member 32 and along the outer wall portion 24 c (FIG. 4) of the left side rear upper portion 24.
- the front side rib 59, the center side rib 61, and the rear side rib 62 are provided on extension lines of the front left parallel rib 52, the center parallel rib 54, and the rear parallel rib 55, respectively.
- the front inclined side rib 63 is provided on a substantially extended line of the left outer radiation rib 44.
- the rear inclined side rib 65 extends along the left outer radial rib 44 from the left end 55a of the rear parallel rib 55 and the inner end 62a of the rear side rib 62 along the left outer radial rib 44 to the outer end 59a of the front side rib 59. I'm out.
- the central inclined side rib 64 extends from the inner end 63 a of the front inclined side rib 63 to the vicinity of the outer end 59 a of the front side rib 59.
- the height of each radiating rib 42 to 45 is set to H1.
- the rib height dimension of each of the parallel ribs 52 to 55 is set to H2.
- the rib height dimension H1 of the radiating rib group 41 is set to be smaller than the rib height dimension H2 of the parallel rib group 51.
- the rear cross member 32 has a cross upper portion 36 formed in an upward curved shape in a state where the subframe 14 (see FIG. 1) is mounted on the vehicle 10. Further, a cross recess 37 of the cross upper portion 36 is formed in a concave shape toward the back surface 36 c of the cross upper portion 36. Therefore, a part 36e of the center part 36d in the vehicle width direction of the cross upper part 36 is formed by the cross recessed part 37, so that a part 36e is arranged at the lowermost part. Further, a radiating rib group 41 and a parallel rib group 51 are provided on the back surface 36 c of the cross upper portion 36.
- the rib height dimension H3 (see also FIG. 9B) of the radiating rib group 41 can be kept small in the vehicle width direction center portion 36d of the rear cross member 32 (specifically, the cross upper portion 36).
- the rib height dimension H4 (see also FIG. 9B) of the parallel rib group 51 can be kept small in the vehicle width direction center portion 36d.
- the right reinforcing rib group 67 is a member symmetrical to the left reinforcing rib group 57, and the same reference numerals as those of the left reinforcing rib group 57 are assigned to the constituent members of the right reinforcing rib group 67, and the description thereof is omitted.
- a space (cavity) 76 for forming the rear subframe 22 is formed inside the mold 75 with the mold 75 being clamped.
- the cavity 76 includes a radiation cavity 76a, a parallel cavity 76b, left and right inclined cavities 76c, and left and right reinforcing cavities 76d.
- the radiating cavities 76a, the parallel cavities 76b, the left and right inclined cavities 76c, and the left and right reinforcing cavities 76d have a radiating rib group 41, parallel rib groups 51, left and right inclined ribs 47, 48 and the left and right left reinforcing rib groups 57 and 67 will be described with reference numerals.
- the radiation cavity 76a is a space in which the radiation rib group 41 is formed.
- the parallel cavity 76 b is a space for forming the parallel rib group 51.
- the left and right inclined cavities 76 c are left and right spaces for forming the left and right inclined ribs 47 and 48.
- the left and right reinforcing cavities 76d are left and right spaces in which the left and right left reinforcing rib groups 57 and 67 are formed.
- the radiation cavity 76a, the parallel cavity 76b, the left and right inclined cavities 76c, and the left and right reinforcing cavities 76d can be used as a guide path for molten metal (molten metal).
- the radiation cavity 76a communicates with the rear end portion facing the gate 77, and is formed to diffuse radially from the rear portion of the rear subframe 22 toward the front portion.
- the gate 77 communicates with the pouring gate 78.
- the radiation cavity 76a is formed so as to intersect the parallel cavity 76b.
- the crossing angle ⁇ 3 between the radiation cavity 76a and the parallel cavity 76b becomes an obtuse angle.
- the radiation cavity 76a is formed so as to intersect the left and right inclined cavities 76c.
- the parallel cavity 76b is formed so as to intersect the left and right reinforcing cavities 76d.
- the molten metal of aluminum alloy is poured into the pouring port 78, whereby the molten metal is guided to the gate 77.
- the molten metal guided to the gate 77 is in the rear end portion of the radiation cavity 76a (that is, the space corresponding to the radiation rib group 41 (the rear end portions 42a to 45a (see FIG. 6) of the radiation ribs 42 to 45)). Guided as shown by arrow A.
- the molten metal guided to the rear end portion of the radiation cavity 76a is guided to the radiation cavity 76a and is well guided as indicated by an arrow B throughout the cavity.
- the molten metal guided to the radiation cavity 76a is guided from the radiation cavity 76a to the parallel cavity 76b and the left and right inclined cavities 76c as indicated by an arrow C.
- the crossing angle ⁇ 3 of the radiation cavity 76a and the parallel cavity 76b is formed as an obtuse angle. Therefore, the light is smoothly guided from the radiation cavity 76a to the parallel cavity 76b.
- the molten metal guided to the parallel cavities 76b and the left and right inclined cavities 76c is guided to the left and right reinforcing cavities 76d.
- the molten metal can be smoothly guided by the radiating cavity 76a, the parallel cavity 76b, the left and right inclined cavities 76c, and the left and right reinforcing cavities 76d to maintain a good flow of hot water. Thereby, the molten metal can be suitably guided to the entire area of the cavity 76.
- the rear sub-frame 22 is a cast member formed in a relatively complicated shape having a substantially U shape in a plan view and a substantially hat-shaped cross section (see FIG. 4). Therefore, in order to efficiently form the rear subframe 22 by low pressure casting, it is required to maintain a good hot water flow. According to the rear subframe 22, the molten metal can be suitably guided to the entire area of the cavity 76, so that the casting time during low pressure casting can be reduced even with a relatively complicated rear subframe 22.
- the rib height dimension H1 of the radiating rib group 41 is set smaller than the rib height dimension H2 of the parallel rib group 51. Therefore, the parallel cavity 76b can be formed larger than the radiation cavity 76a. Thereby, the molten metal guided to the radiation cavity 76a can be smoothly guided from the radiation cavity 76a to the parallel cavity 76b as indicated by an arrow C.
- the molten metal guided to the parallel cavities 76b can be smoothly guided toward the outside in the vehicle width direction to maintain a good hot water flow. Thereby, since molten metal can be suitably guided to the whole area of the cavity 76, the low-pressure casting time of the rear subframe 22 can be further reduced.
- the rib height dimension H ⁇ b> 3 of the radiating rib group 41 and the rib height dimension H ⁇ b> 4 of the parallel rib group 51 are kept small in the vehicle width direction center portion 36 d of the rear cross member 32.
- the space (the recess cavity 76e) in which the cross recess 37 is formed communicates with the radiation cavity 76a and the parallel cavity 76b. Formed with.
- the concave cavity 76e will be described with reference to the cross concave 37 for easy understanding of the configuration.
- the cavity height dimensions H3 and H4 of the radiation cavity 76a and the parallel cavity 76b communicating with the recess cavity 76e can be kept small. Therefore, the molten metal led to the radiation cavity 76a and the parallel cavity 76b can be smoothly guided to the concave cavity 76e to keep the hot water flow well. Thereby, since molten metal can be suitably guided to the whole area of the cavity 76, the low-pressure casting time of the rear subframe 22 can be further reduced.
- vehicle subframe according to the present invention is not limited to the above-described embodiment, and can be changed or improved as appropriate.
- the present invention is applied to the rear subframe 22 formed by low pressure casting has been described.
- the present invention is not limited thereto, and the present invention is applied to the rear subframe 22 formed by die casting (high pressure). It is also possible to make it.
- the rectangular subframe 14 has been described as the vehicle subframe.
- the present invention is not limited to this and may be applied to other shapes of vehicle subframes such as a substantially U shape (I shape). It is also possible to apply.
- the sub-frame 14 is illustrated by joining a steel front sub-frame 21 and an aluminum rear sub-frame (casting member) 22. It is also possible to apply the present invention to a subframe formed only with a rear subframe (casting member).
- the vehicle 10 the subframe 14, the left and right front suspensions 15 and 16, the rear subframe 22, the left and right side members 23 and 26, the left and right side rear upper portions 24 and 27, and the rear shown in the embodiment.
- the shapes and configurations of the cross member 32, the cross upper portion 36, the cross recess 37, the radiating rib group 41, the left and right outer radiating ribs 44 and 45, the parallel rib group 51, and the like are not limited to those illustrated, and can be appropriately changed. is there.
- the present invention is suitable for application to an automobile provided with a part constituting a part of the frame and a vehicle sub-frame in which a cast member is used for the entire frame.
- Vehicle width direction center part, 36f Center rear end (rear end) in the center in the vehicle width direction, 37 ... cross recess, 41 ... radiation rib group (a plurality of radiation ribs), 44, 45 ... left and right outer radiation ribs ( Radial ribs of the right and left provided on the widthwise outer side), 51 ... parallel rib group (a plurality of parallel ribs), H1 ⁇ H4 ... rib height dimension, .theta.1, .theta.2 ... tilt angle.
Abstract
Description
図11(a)に示されるように、金型75を型締めした状態で、金型75の内部に後部サブフレーム22を形成する空間(キャビティ)76が形成される。キャビティ76は、放射キャビティ76a、平行キャビティ76b、左右の傾斜キャビティ76cおよび左右の補強キャビティ76dを有する。
Claims (4)
- 車両の左側に設けられて車両前後方向に延びる左サイドメンバと、車両の右側に設けられて車両前後方向に延びる右サイドメンバと、左右のサイドメンバを連結するクロスメンバとを備え、左右のサスペンションを支持する車両用サブフレームであって、
前記クロスメンバ、前記左サイドメンバの後部および前記右サイドメンバの後部がアルミニウム合金で平面視略U字状に一体に成形され、
前記クロスメンバは、
車幅方向中央部の後端から前端に向けて車幅方向外側に傾斜するように放射状に延出する複数の放射リブと、
前記複数の放射リブに交差し、かつ前記クロスメンバに平行に延出する複数の平行リブと、を有し、
前記複数の放射リブは、
前記クロスメンバの車幅方向中央部から車幅方向外側に設けられるほど傾斜角が大きく設定される、ことを特徴とする車両用サブフレーム。 - 前記複数の放射リブのうち、
車幅方向外側に設けられた左右の放射リブがそれぞれ前記左右のサスペンションに向けて延出している、請求項1記載の車両用サブフレーム。 - 前記複数の放射リブは、
前記平行リブよりリブ高さ寸法が小さい、請求項1または請求項2記載の車両用サブフレーム。 - 前記車両用サブフレームが車両に設けられた状態で、
前記クロスメンバは、
前記左サイドメンバの後部および前記右サイドメンバの後部に架け渡されるとともに車幅方向中央部が上方に隆起するように湾曲状に形成され、かつ、前記複数の放射リブおよび前記平行リブが裏面に設けられたクロス上部を有し、
前記クロス上部は、
車両幅方向に延出し、かつ、車幅方向中央部の一部が最下部位となるように前記裏面に向けて凹状に形成されたクロス凹部を有する、請求項1~3のいずれか1項記載の車両用サブフレーム。
Priority Applications (9)
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US14/417,187 US9216775B2 (en) | 2012-07-27 | 2013-07-02 | Subframe for vehicle |
BR112015001506A BR112015001506A2 (pt) | 2012-07-27 | 2013-07-02 | subarmação para veículo |
GB1501248.7A GB2531614B (en) | 2012-07-27 | 2013-07-02 | Subframe for vehicle |
CN201380039905.3A CN104507784B (zh) | 2012-07-27 | 2013-07-02 | 车辆用副车架 |
AU2013294254A AU2013294254B2 (en) | 2012-07-27 | 2013-07-02 | Subframe for vehicle |
CA2879181A CA2879181C (en) | 2012-07-27 | 2013-07-02 | Subframe for vehicle |
JP2014526833A JP5879438B2 (ja) | 2012-07-27 | 2013-07-02 | 車両用サブフレーム |
MX2015001084A MX356235B (es) | 2012-07-27 | 2013-07-02 | Estructura auxiliar para un vehículo. |
DE201311003701 DE112013003701T5 (de) | 2012-07-27 | 2013-07-02 | Hilfsrahmen für Fahrzeug |
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JP2012167616 | 2012-07-27 | ||
JP2012-167616 | 2012-07-27 |
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US (1) | US9216775B2 (ja) |
JP (1) | JP5879438B2 (ja) |
CN (1) | CN104507784B (ja) |
AU (1) | AU2013294254B2 (ja) |
BR (1) | BR112015001506A2 (ja) |
CA (1) | CA2879181C (ja) |
DE (1) | DE112013003701T5 (ja) |
GB (1) | GB2531614B (ja) |
MX (1) | MX356235B (ja) |
WO (1) | WO2014017260A1 (ja) |
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Also Published As
Publication number | Publication date |
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US20150166104A1 (en) | 2015-06-18 |
AU2013294254B2 (en) | 2016-02-11 |
US9216775B2 (en) | 2015-12-22 |
AU2013294254A1 (en) | 2015-02-05 |
GB2531614B (en) | 2018-12-19 |
JPWO2014017260A1 (ja) | 2016-07-07 |
BR112015001506A2 (pt) | 2017-07-04 |
GB2531614A (en) | 2016-04-27 |
JP5879438B2 (ja) | 2016-03-08 |
GB201501248D0 (en) | 2015-03-11 |
DE112013003701T5 (de) | 2015-04-09 |
CA2879181C (en) | 2016-08-30 |
CA2879181A1 (en) | 2014-01-30 |
CN104507784B (zh) | 2017-05-17 |
MX356235B (es) | 2018-05-18 |
CN104507784A (zh) | 2015-04-08 |
MX2015001084A (es) | 2016-02-05 |
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