WO2014175414A1 - 車両のサブフレーム - Google Patents
車両のサブフレーム Download PDFInfo
- Publication number
- WO2014175414A1 WO2014175414A1 PCT/JP2014/061665 JP2014061665W WO2014175414A1 WO 2014175414 A1 WO2014175414 A1 WO 2014175414A1 JP 2014061665 W JP2014061665 W JP 2014061665W WO 2014175414 A1 WO2014175414 A1 WO 2014175414A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rib
- core
- vehicle
- subframe
- opening
- 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
- 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
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
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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
- B62D29/007—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of special steel or specially treated steel, e.g. stainless steel or locally surface hardened steel
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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 that is provided below a vehicle body and supports left and right suspensions at left and right ends.
- Some vehicles are known in which a cast subframe is provided on a body frame, and a component such as a transmission device is supported on the subframe.
- the subframe is formed in a hollow shape with a core disposed in a casting mold cavity during casting. Further, the sub-frame has a core outlet (hereinafter referred to as “sand discharge port”) formed in the lower part in order to remove the core after casting.
- sand discharge port a core outlet
- the core receives pressure from the mold by only one of the fixed mold and the movable mold.
- An object of the present invention is to provide a vehicle subframe in which the thickness of the subframe can be formed uniformly and rigidity and strength can be ensured.
- a main body having an upper portion and a lower portion that are integrally formed by casting using a core and formed in a hollow shape with the core and provided at predetermined intervals in the vertical direction.
- left and right suspension support portions that are provided at the left and right end portions of the main body portion and support the left and right suspensions, respectively, and are provided at the upper portion and the lower portion, respectively.
- the upper parallel portion and the lower parallel portion that are substantially parallel in the direction, the upper opening formed in the upper parallel portion, and the lower parallel portion (71) facing the upper opening, the upper opening (56 And a lower opening (75) formed in a shape equivalent to that of the vehicle subframe.
- the upper portion includes a slope portion that is provided at a front portion of the upper portion in the vehicle front-rear direction and is sloped downward toward the vehicle front, and a slope opening formed in the slope portion.
- the lower portion has a front opening formed in the lower portion facing the inclined opening.
- the main body portion is provided in a portion of the main body portion adjacent to the suspension support portion and extends in the vehicle longitudinal direction, and a horizontal rib provided in the adjacent portion and extends in the vehicle width direction.
- the main body includes a connecting portion to which a connecting member that supports a power plant serving as a driving source of the vehicle is connected, and the main body extends from the connecting portion toward the outside of the main body.
- the upper parallel part and the lower parallel part are respectively provided at the upper part and the lower part of the main body part, and the upper opening part and the lower opening part are formed in the upper parallel part and the lower parallel part, respectively. Furthermore, the upper opening and the lower opening were formed in the same shape.
- the same supporting force can be applied to the core arranged in the cavity from the lower opening side and the upper opening side with the casting mold.
- the core can be prevented from being displaced by the molten metal flowing into the cavity, and the thickness of the subframe can be formed uniformly.
- the thickness of the subframe uniformly it is possible to prevent the thickness portion from being generated and to reduce the weight of the subframe.
- the strength of the subframe can be stabilized over the entire frame.
- the inclined opening is formed in the upper inclined portion, and the front opening is formed in the lower portion facing the inclined opening. Therefore, it is possible to apply a supporting force to the core disposed in the cavity with the casting mold from the inclined opening side and the front opening side. As a result, the displacement of the core due to the molten metal flowing into the cavity can be suppressed more favorably, and the thickness of the subframe can be formed more uniformly.
- the sand opening can be opposed to the core holding pin by using the inclined opening as an opening formed by the core holding pin and the front opening as the sand discharging port.
- the core can be suitably held without increasing the number of sand discharge ports more than necessary.
- vertical ribs and horizontal ribs are provided in the main body portion adjacent to the suspension support portion. Therefore, the rigidity and strength of the subframe (particularly, the suspension support portion) can be ensured by reinforcing the portion adjacent to the suspension support portion with the vertical rib or the horizontal rib. Thereby, the load input from the suspension arm to the suspension support portion can be suitably supported by the subframe.
- the upper vertical ribs and the lower vertical ribs are alternately formed in the vehicle width direction, and the upper horizontal ribs and the lower horizontal rib are alternately formed in the vehicle longitudinal direction.
- the upper vertical rib and the lower vertical rib are formed by concave vertical grooves provided on the upper surface and the lower surface of the core. Therefore, by forming the upper vertical ribs and the lower vertical ribs alternately in the vehicle width direction, the vertical groove portions on the upper surface and the lower surface can be alternately formed in the vehicle width direction.
- the upper lateral rib and the lower lateral rib are formed by concave lateral grooves formed on the upper surface and the lower surface of the core. Therefore, by forming the upper lateral ribs and the lower lateral ribs alternately in the vehicle width direction, the upper and lower lateral groove portions can be alternately formed in the vehicle width direction.
- the core thickness dimension of the portion where the vertical groove portion and the horizontal groove portion are formed is compared with the case where the groove portions are overlapped. Largely secured. Thereby, the strength of the core can be ensured in a state where the vertical groove portion and the horizontal groove portion are formed in the core.
- the upper and lower vertical ribs are staggered, and the upper and lower horizontal ribs are staggered, so that the cross-sectional area of the hollow portion at the site where the vertical ribs and horizontal ribs are formed, the upper and lower ribs It is possible to secure a large amount compared to the case of overlapping. Thereby, when removing a core from the hollow part of a sub-frame, a core can be removed smoothly, without preventing movement of a core with a vertical rib or a horizontal rib.
- the input load when the load is input to the connecting portion, the input load can be supported by the rib by extending the rib from the connecting portion toward the outside of the main body. Moreover, the hole formed in the core support part which supports a core was provided in the vicinity of the rib. Therefore, when the load is input, the rib can prevent the hole from being a starting point of stress concentration. Thereby, it can prevent that the rigidity and intensity
- the core support portion can be disposed at a portion adjacent to the connecting portion or the left and right suspension support portions, so that the core support portion can be disposed at a suitable position.
- the rib extends diagonally backward from the connecting part. Thereby, the load input to the connecting portion can be efficiently supported by the rib, and the rigidity and strength of the subframe can be ensured.
- the rib extends outward in the vehicle width direction from the connecting portion toward the suspension support portion.
- the hole is surrounded by ribs, parallel ribs and cross ribs, so that the holes can be reinforced with ribs, parallel ribs and cross ribs. Thereby, it can prevent more suitably that a hole becomes a starting point of stress concentration.
- FIG. 2 is a bottom view of the subframe illustrated in FIG. 1.
- FIG. 2 is a perspective view of a subframe shown in FIG. 1.
- FIG. 4 is a sectional view taken along line 4-4 of FIG.
- FIG. 5 is a sectional view taken along line 5-5 of FIG.
- FIG. 6 is a view taken along arrow 6 in FIG. 3.
- FIG. 7 is a perspective view showing a state broken along line 7-7 in FIG. 6;
- FIG. 8 is a view taken in the direction of arrow 8 in FIG. 3.
- FIG. 9 is a sectional view taken along line 9-9 of FIG.
- FIG. 10 is a cross-sectional view taken along line 10-10 of FIG.
- FIG. 7 is a cross-sectional view showing a state in which a core broken along line 7-7 in FIG. 6 is arranged in a casting mold. It is the figure which showed the example which casts the sub-frame which concerns on this invention.
- (A) is the 16a part enlarged view of FIG.
- FIG. 20 is a sectional view taken along line 20-20 in FIG.
- FIG. 20 is a sectional view taken along line 21-21 in FIG.
- FIG. 22 is a cross-sectional view taken along line 22-22 of FIG. It is sectional drawing which shows the state which supported the left core with the baseboard which concerns on this invention. It is sectional drawing which shows the state which supported the left core with the upper core holding pin which concerns on this invention.
- the vehicle body front structure 10 is attached to the left and right side frames 11 and 12 arranged to extend in the longitudinal direction of the vehicle body, and below the left and right side frames 11 and 12.
- the subframe 15 includes left and right suspension arms 16 and 17 provided at left and right ends of the subframe 15, and left and right suspensions 21 and 22 connected to the left and right suspension arms 16 and 17.
- the vehicle body front structure 10 includes a steering gear box 24 attached to the upper portion 15a of the subframe 15 and a torque rod 26 that connects the subframe 15 and the power plant 25.
- a steering wheel 29 is attached to a steering shaft 28 extending from the steering gear box 24.
- the power plant 25 is an engine / transmission unit in which an engine and a transmission are integrally formed and disposed sideways between the left and right side frames 11 and 12.
- the sub-frame 15 is formed into a wall thickness T1 by high-pressure casting integrally with an aluminum alloy using a core unit 200 (see FIGS. 13 and 18).
- the subframe 15 includes a main body portion 32 formed in a hollow shape by the core unit 200, a left vehicle body attachment portion 34 and a left suspension support portion 35 provided at the left end portion 32 a of the main body portion 32, and the main body portion 32.
- a right vehicle body attachment portion 36 and a right suspension support portion 37 provided at the right end portion 32 b, and a central connection portion (portion where the connection member is connected) 38 provided at the front center portion of the main body portion 32 are provided.
- the left vehicle body attachment portion 34 includes a left front attachment portion 34a provided at the front portion 32c of the left end portion 32a of the main body portion 32, and a left rear attachment portion 34b provided at the rear portion 32d of the left end portion 32a of the main body portion 32.
- the right vehicle body attachment portion 36 includes a right front attachment portion 36 a provided at the front portion 32 e of the right end portion 32 b of the main body portion 32 and a rear portion 32 f of the right end portion 32 b of the main body portion 32. And a right rear mounting portion 36b.
- the left front attachment portion 34a and the left rear attachment portion 34b are attached to the left side frame 11 (FIG. 1) with bolts. Further, the right front mounting portion 36a and the right rear mounting portion 36b are attached to the right side frame 12 (FIG. 1) with bolts. Thereby, as shown in FIG. 1, the subframe 15 is attached between the left and right side frames 11 and 12.
- the main body 32 has an upper part 41 located on the upper side, a lower part 42 located on the lower side, and the front end parts 41a and 42a of the upper part 41 and the lower part 42 before being connected.
- the wall 43 and the rear wall 44 which connects each rear end part 41b and 42b of the upper part 41 and the lower part 42 are provided.
- a hollow portion 45 is formed by an upper portion 41, a lower portion 42, a front wall 43 and a rear wall 44.
- the upper part 41 and the lower part 42 are provided at a predetermined interval in the vertical direction.
- the upper portion 41 is formed with a plurality of upper holding pin openings 47 (illustrating the upper holding pin openings 47 formed in the front portion of the outer periphery 41c) along the outer periphery 41c.
- the plurality of upper holding pin openings 47 are formed by supporting the core unit 200 with a plurality of upper core holding pins (core support portions) 253 (see FIG. 24) during casting.
- the upper portion 41 is provided with a plurality of upper vertical ribs 48 (see FIG. 6) and a plurality of upper horizontal ribs 49 that are provided on the inner surface 41d and reinforce the subframe 15. As shown in FIGS. 5 and 6, the upper vertical rib 48 protrudes from the inner surface 41 d toward the hollow portion 45 and extends in the vehicle front-rear direction. The upper horizontal rib 49 protrudes from the inner surface 41d toward the hollow portion 45 and extends in the vehicle width direction.
- the upper portion 41 is inclined to the upper parallel portion 52 formed substantially horizontally at the rear portion in the vehicle front-rear direction, the raised portion 53 formed at the front end portion 52a of the upper parallel portion 52, and the front end portion 53a of the raised portion 53. And an upper inclined portion 54 formed.
- the upper parallel part 52 has an upper left sand outlet (upper opening) 56 formed in the vicinity of the left end part 52b and an upper right sand outlet (upper opening) 57 formed in the vicinity of the right end part 52c.
- the upper left sand outlet 56 and the upper right sand outlet 57 are openings for removing the core unit 200 (see FIG. 13) from the hollow portion 45 of the sub frame 15 to the outside of the sub frame 15.
- the upper inclined portion 54 is provided in the front portion of the upper portion 41 in the vehicle front-rear direction, and is inclined downwardly from the rear of the vehicle toward the front of the vehicle.
- the upper inclined portion 54 is in the vicinity of the left end portion 54a and in the front upper left inclined opening 58 formed in front of the left upper sand discharge port 56, in the vicinity of the right end portion 54b and in the upper right sand discharge port 57.
- an upper right inclined opening 59 formed in front of the vehicle.
- the upper left inclined opening 58 and the upper right inclined opening 59 are one of the plurality of upper holding pin openings 47, and the corresponding upper openings are defined as the upper left inclined opening 58 and the upper right inclined opening for easy understanding of the configuration. This will be described as the section 59.
- the lower part 42 is formed with a plurality of lower holding pin openings 62 provided on the outer periphery 42 c and a plurality of baseboard openings 63.
- the plurality of lower holding pin openings 62 are formed by supporting the core unit 200 (see FIG. 13) with a plurality of lower core holding pins (core support portions) during casting.
- the baseboard opening 63 is formed by supporting the core unit 200 with a baseboard (core support portion) 235 (see FIG. 19) during casting.
- the lower portion 42 includes a plurality of lower vertical ribs 66 and a plurality of lower horizontal ribs 67 provided on the inner surface 42d to reinforce the subframe 15.
- the lower vertical rib 66 protrudes from the inner surface 42d toward the hollow portion 45 and extends in the vehicle front-rear direction.
- the lower horizontal rib 67 protrudes from the inner surface 42 d toward the hollow portion 45 and extends in the vehicle width direction.
- the lower part 42 includes a lower rear parallel part (lower parallel part) 71 formed substantially horizontally at the rear part in the vehicle front-rear direction, a lower inclined part 72 formed at a front end 71a of the lower rear parallel part 71, and a lower inclined part.
- the front end portion 72a of the portion 72 has a lower front parallel portion (lower parallel portion) 73 formed substantially horizontally.
- An upper parallel portion 52 is formed above the lower rear parallel portion 71 at a predetermined interval so as to face the lower rear parallel portion 71.
- the upper parallel part 52 and the lower rear parallel part 71 are formed to be substantially parallel in the vehicle front-rear direction.
- the lower rear parallel portion 71 is formed in the vicinity of the lower left rear sand discharge port (lower opening) 75 formed in the vicinity of the left end portion 71b and the right end portion 71c shown in FIG. And a lower right rear sand discharge port (lower opening) 76.
- the lower left rear sand discharge port 75 is formed in the same shape as the upper left sand discharge port 56 at a portion of the lower rear parallel portion 71 facing the upper left sand discharge port 56.
- the lower right rear sand discharge port 76 is formed in a shape equivalent to that of the upper right sand discharge port 57 at a portion facing the upper right sand discharge port 57 in the lower rear parallel portion 71.
- the lower left rear sand outlet 75 and the lower right rear sand outlet 76 allow the core unit 200 to be moved outside the sub frame 15 from the hollow portion 45 of the sub frame 15. It is an opening for removing.
- the lower front parallel portion 73 is provided in a portion of the lower portion 42 that is a front portion in the vehicle front-rear direction and faces the upper inclined portion 54, and is formed substantially horizontally.
- the lower front parallel portion 73 is in the vicinity of the left end portion 73a and in the vicinity of the lower left front sand discharge port (front opening) 77 formed on the vehicle front side of the lower left rear sand discharge port 75 and the right end portion 73b.
- a lower right front sand discharge port (front opening) 78 formed in front of the lower right rear sand discharge port 76 in the vehicle.
- the lower left front sand discharge port 77 is formed in a part of the lower part 42 (specifically, the lower front parallel part 73) facing the upper left inclined opening 58 (see FIG. 3).
- the lower right front sand discharge port 78 is formed in a portion of the lower portion 42 (specifically, the lower front parallel portion 73) facing the upper right inclined opening 59.
- the lower front parallel portion 73 is provided in a portion of the lower portion 42 that is a front portion in the vehicle front-rear direction and that faces the upper inclined portion 54 and is substantially horizontal.
- the lower front parallel portion 73 has a lower right front sand discharge port 78 formed in the vicinity of the left end portion 73a and on the vehicle front side of the lower left rear sand discharge port 75.
- the lower left front sand outlet 77 and the lower right front sand outlet 78 connect the core unit 200 (see FIG. 11) from the hollow portion 45 of the subframe 15 to the outside. It is an opening for removing.
- the left suspension support portion 35 includes a left front connecting portion 81 provided at the front portion 32 c of the left end portion 32 a of the main body portion 32 and a rear portion of the left end portion 32 a of the main body portion 32. And a left rear connecting portion 82 provided at 32d.
- the left front connecting portion 81 is disposed on the vehicle front side from the left front mounting portion 34a by being provided so as to protrude from the front portion 32c to the front of the vehicle.
- the left rear connecting portion 82 is interposed between the left rear mounting portion 34b and the rear portion 32d by being provided on the inner side in the vehicle width direction from the left rear mounting portion 34b (see also FIG. 3).
- a front mounting portion 16 a of the left suspension arm 16 is connected to the left front connection portion 81 via a left front support pin 84.
- the rear attachment portion 16b of the left suspension arm 16 is connected to the left rear connection portion 82 via a left rear support pin.
- the lower end 21 a of the left suspension 21 is connected to the left suspension arm 16, and the upper end 21 b of the left suspension 21 is connected to the left damper housing 13.
- the left damper housing 13 is formed integrally with the left side frame 11. Therefore, the left suspension 21 is supported by the left suspension arm 16. As a result, the left suspension 21 is supported by the left suspension support portion 35 via the left suspension arm 16.
- the right suspension support portion 37 is connected to the right front connection portion 87 provided at the front portion 32 e of the right end portion 32 b of the main body portion 32 and the rear portion 32 f of the right end portion 32 b of the main body portion 32. And a right rear connecting portion 88 provided.
- the front right connecting portion 87 is disposed on the vehicle front side from the front right mounting portion 36a by being provided so as to protrude from the front portion 32e to the front of the vehicle.
- the right rear connecting portion 88 is interposed between the right rear mounting portion 36b and the rear portion 32f by being provided on the inner side in the vehicle width direction from the right rear mounting portion 36b (see also FIG. 3).
- a front mounting portion 17 a of the right suspension arm 17 is connected to the right front connection portion 87 via a right front support pin 91.
- the rear attachment portion 17b of the right suspension arm 17 is connected to the right rear connection portion 88 via a right rear support pin.
- the right suspension arm 17 is a substantially symmetrical member with the left suspension arm 16.
- a lower end 22 a of the right suspension 22 is connected to the right suspension arm 17, and an upper end 22 b of the right suspension 22 is connected to the right damper housing 14.
- the right damper housing 14 is formed integrally with the right side frame 12. Therefore, the right suspension 22 is supported by the right suspension arm 17. As a result, the right suspension 22 is supported by the right suspension support portion 37 via the right suspension arm 17.
- a central coupling portion 38 is provided at the center of the main body portion 32 in the vehicle width direction and at the front half portion (that is, the front portion in the vehicle rearward direction) 32 g.
- the base end portion 26 a of the torque rod 26 is connected to the central connecting portion 38 by a bolt 51 (see FIG. 1) and a nut 52. Thereby, the power plant 25 is supported by the torque rod 26.
- the upper vertical rib 48 includes a left outer upper vertical rib 48 a and a left inner upper vertical rib 48 b provided at the left end portion 41 e of the upper portion 41, and a right portion provided at the right end portion 41 f of the upper portion 41. It has an outer upper vertical rib 48c and a right inner upper vertical rib 48d. Each of the upper vertical ribs 48a to 48d extends in the vehicle front-rear direction.
- the left outer upper vertical rib 48a is provided in a portion of the left end portion 41e of the upper portion 41 adjacent to the left suspension support portion 35 (the left front connecting portion 81) (that is, the front portion of the left end portion 41e) 41g and further adjacent thereto.
- the vehicle extends from the portion 41g to the rear portion 41h toward the rear of the vehicle.
- the left outer upper vertical rib 48a is a cross rib that intersects the left front upper horizontal rib 49a and the left rear upper horizontal rib 49b.
- the left inner upper vertical rib 48b is provided in a portion 41i adjacent to the left suspension support portion 35 (left front connecting portion 81) in the left end portion 41e of the upper portion 41 and in the vehicle width direction inner side from the left outer upper vertical rib 48a. ing. Since the right outer upper vertical rib 48c and the right inner upper vertical rib 48d are members symmetrical with the left outer upper vertical rib 48a and the left inner upper vertical rib 48b, detailed description thereof is omitted.
- the upper horizontal rib 49 includes a left front upper horizontal rib 49a provided in a portion 41g adjacent to the left front connecting portion 81 in the upper portion 41 (left end portion 41e), and a left rear upper provided in the rear of the left front upper horizontal rib 49a. It has a horizontal rib 49b, a right front upper horizontal rib 49c provided at the right front connecting portion 87 in the upper portion 41 (right end portion 41f), and a right rear upper horizontal rib 49d provided behind the right front upper horizontal rib 49c. .
- Each of the upper horizontal ribs 49a to 49d extends in the vehicle width direction.
- the left front upper horizontal rib 49a is provided in a portion 41g adjacent to the left suspension support portion 35 (left front connecting portion 81) in the left end portion 41e of the upper portion 41.
- the left front upper horizontal rib 49 a is provided in a portion of the portion 41 g adjacent to the left front connecting portion 81 that is separated from the front wall 43 toward the rear of the vehicle.
- the left front upper horizontal rib 49a is a rib extending in parallel to the left rear upper horizontal rib 49b at a predetermined interval in the vehicle front-rear direction.
- the left front upper horizontal rib 49 a and the left outer upper vertical rib 48 a intersect at an upper intersection 93.
- the left rear upper horizontal rib 49b is adjacent to the left suspension support portion 35 (left front connecting portion 81) in the left end portion 41e of the upper portion 41, and is provided at a vehicle rear portion 41j of the left front upper horizontal rib 49a. Further, the left rear upper horizontal rib 49b extends from the vehicle rear portion 41j to the vehicle width direction center 41k.
- the left rear upper horizontal rib 49 b and the left outer upper vertical rib 48 a intersect at the upper outer intersection 94, and the left rear upper horizontal rib 49 b and the left inner upper vertical rib 48 b intersect at the upper inner intersection 95.
- the left rear upper horizontal rib 49 b extends from the central coupling portion 38 toward the outside of the main body portion 32. Specifically, the left rear upper horizontal rib 49 b extends outward in the vehicle width direction from the central coupling portion 38 toward the left suspension support portion 35. Thereby, the load input to the central coupling portion 38 and the load input to the left suspension support portion 35 can be efficiently supported by the left rear upper horizontal rib 49b, and the rigidity and strength of the subframe 15 can be ensured. .
- an upper holding pin opening 47 formed with an upper core holding pin 253 (see FIG. 24) that supports the core unit 200 (see FIG. 18) is provided on the left rear upper side. It was provided in the vicinity of the lateral rib 49b. Therefore, when the load is input, the upper holding pin opening 47A can be prevented from becoming a stress concentration starting point by the rib. Thereby, it is possible to prevent the rigidity and strength of the subframe 15 from being lowered by the upper holding pin opening 47 ⁇ / b> A formed by the upper core holding pin 253.
- the upper core holding pin 253 (see FIG. 24) can be disposed at a portion adjacent to the left suspension support portion 35. 253 can be placed in a suitable position. Thereby, when casting the sub-frame 15, since the core unit 200 (refer FIG. 18) can be arrange
- the left rear upper horizontal rib 49b and the left outer upper vertical rib 48a intersect at the upper outer intersection 94, and the left rear upper horizontal rib 49b and the left inner upper vertical rib 48b intersect at the upper inner intersection 95. Since the right front upper horizontal rib 49c and the right rear upper horizontal rib 49d are members symmetrical with the left front upper horizontal rib 49a and the left rear upper horizontal rib 49b, detailed description thereof is omitted.
- the lower vertical rib 66 includes a lower left outer vertical rib 66a provided at the left end 42e of the lower portion 42, and a lower left inner rib provided at the inner side in the vehicle width direction of the lower left outer vertical rib 66a. It has a vertical rib 66b, a lower right outer vertical rib 66c provided at the right end 42f of the lower part 42, and a lower right inner vertical rib 66d provided inside the right lower outer vertical rib 66c in the vehicle width direction. Each of the lower vertical ribs 66a to 66d extends in the vehicle front-rear direction.
- the lower left outer vertical rib 66a is provided in a portion of the left end portion 42e of the lower portion 42 adjacent to the left suspension support portion 35 (the left front connecting portion 81) (that is, the front portion of the left end portion 42e), and further adjacent to the portion 42g. It extends toward the rear of the vehicle from 42g to the rear part 42h.
- the lower left inner vertical rib 66b is provided on the inner side in the vehicle width direction of the lower left outer vertical rib 66a and in the vicinity of the center in the vehicle width direction (part adjacent to the central connecting portion 38) 42k.
- the lower left inner vertical rib 66 b is a cross rib that intersects the left rear lower horizontal rib 67 c and the lower center horizontal rib 61.
- the lower left front sand outlet 77 and the lower left rear sand outlet 75 are provided on the inner side in the vehicle width direction.
- the lower right outer vertical rib 66c and the lower right inner vertical rib 66d are members symmetrical with the left lower outer vertical rib 66a and the lower left inner vertical rib 66b, detailed description thereof is omitted.
- the lower horizontal rib 67 includes a left front lower horizontal rib 67a provided on the front portion 42g of the lower portion 42 (left end portion 42e), a left center lower horizontal rib 67b provided on the vehicle rear side of the left front lower horizontal rib 67a, A vehicle having a left rear lower horizontal rib 67c provided on the vehicle rear side of the center lower horizontal rib 67b, a right front lower horizontal rib 67d provided in a front portion 42i of the lower portion 42 (right end portion 42f), and a right front lower horizontal rib 67d.
- a right center lower horizontal rib 67e provided on the rear side and a right rear lower horizontal rib 67f provided on the vehicle rear side of the right center lower horizontal rib 67e.
- Each of the lower horizontal ribs 67a to 67e extends in the vehicle width direction.
- the left front lower horizontal rib 67a is a portion of the left end portion 42e of the lower portion 42 that is adjacent to the left suspension support portion 35 (the left front connection portion 81) (that is, the front portion of the left end portion 42e) 42g, and the vehicle extends from the front wall 43. It is provided at a location slightly away from the rear.
- the left front lower horizontal rib 67 a and the left lower outer vertical rib 66 a intersect at the lower front intersection 68.
- the left center lower horizontal rib 67b is adjacent to the left suspension support portion 35 (left front connecting portion 81) in the left end portion 42e of the lower portion 42, and is provided in a portion 42j on the vehicle rear side from the left front lower horizontal rib 67a. . Furthermore, the left center lower horizontal rib 67b extends from the rear portion 42j of the vehicle to the vicinity of the vehicle width direction center 42k (see FIG. 9).
- the left center lower horizontal rib 67 b and the left lower outer vertical rib 66 a intersect at a lower center outer intersection 69.
- the left center lower horizontal rib 67 b and the left lower inner vertical rib 66 b intersect at a lower center inner intersection 97.
- the left rear lower horizontal rib 67c is provided in a part 42l on the rear side of the vehicle from the left center lower horizontal rib 67b. Further, the left rear lower horizontal rib 67c extends from the rear part 42l of the vehicle to the vicinity of the center 42k in the vehicle width direction. In other words, the left rear lower horizontal rib 67c extends inward and outward in the vehicle width direction from the central connecting portion 38 toward the outside of the main body portion 32.
- the left rear lower horizontal rib 67 c and the left lower outer vertical rib 66 a intersect at a lower rear outer intersection 98. Further, the left rear lower horizontal rib 67 c and the left lower inner vertical rib 66 b intersect at the lower rear inner intersection 99.
- a splint opening 63 (reference numeral 63B is attached for easy understanding) is provided.
- the left rear lower separation rib 67c can prevent the splint opening 63B from becoming a starting point of stress concentration. Therefore, it can prevent that the rigidity and intensity
- the lower core holding pin can be arranged at a suitable portion adjacent to the central connecting portion 38.
- the core unit 200 can be suitably arranged with the lower core holding pins, so that the thickness of the subframe 15 can be formed uniformly.
- the left rear lower horizontal rib 67 c and the left lower outer vertical rib 66 a intersect at a lower rear outer intersection 98. Further, the left rear lower horizontal rib 67 c and the left lower inner vertical rib 66 b intersect at the lower rear inner intersection 99.
- the right front lower horizontal rib 67d, the right center lower horizontal rib 67e, and the right rear lower horizontal rib 67f are symmetrical with the left front lower horizontal rib 67a, the left center lower horizontal rib 67b, and the left rear lower horizontal rib 67c, and detailed description thereof is omitted. To do.
- the lower part 42 of the main body part 32 is provided with left and right lower inclined ribs 64 and 65 at the center 42k in the vehicle width direction.
- the left and right lower inclined ribs 64 and 65 are extended from the central coupling portion 38 toward the outside of the main body portion 32. That is, the left and right lower inclined ribs 64, 65 are provided in the rear half of the vehicle front-rear direction in the center 42k in the vehicle width direction, and are gradually outward in the vehicle width direction of the center connecting portion 38 and toward the rear of the vehicle. It is formed in a slanting shape obliquely rearward so as to spread.
- the lower holding pin opening 62A and the splint opening 63C can be reinforced by the left and right lower inclined ribs 64 and 65.
- the left lower holding pin opening 62A is more preferably reinforced because it is surrounded by the lower left inclined rib and the left rear lower horizontal rib 67c.
- the lower holding pin opening 62A on the right side is further reinforced because it is surrounded by the lower right inclined rib 65 and the right rear lower lateral rib 67f.
- a lower central lateral rib 61 is provided in the lower portion 42 of the main body 32 in front of the left and right lower inclined ribs 64 and 65 in the vehicle.
- the lower center lateral rib 61 is provided at the front portion in the vehicle front-rear direction of the center 42k in the vehicle width direction and extends toward the vehicle width direction.
- the lower central horizontal rib 61 is a parallel rib extending in parallel to the left rear lower horizontal rib 67c and the right rear lower horizontal rib 67f at a predetermined interval in the vehicle front-rear direction.
- the left outer upper vertical rib 48a and the left inner upper vertical rib 48b are formed in a portion 41g adjacent to the left suspension support portion 35 (left front connecting portion 81) of the left end portion 41e of the upper portion 41.
- a left front upper horizontal rib 49a and a left rear upper horizontal rib 49b are provided. Therefore, the portion 41g of the upper portion 41 can be reinforced by the upper vertical ribs 48a and 48b and the upper horizontal ribs 49a and 49b.
- a left lower outer vertical rib 66a, a left front lower horizontal rib 67a, and a left center lower horizontal rib 67b are provided in a portion 42g adjacent to the left suspension support portion 35 (the left front connecting portion 81) in the left end portion 42e of the lower portion 42. Yes. Therefore, the part 42g of the lower part 42 can be reinforced with the lower vertical rib 66a and the lower horizontal ribs 67a and 67b.
- the rigidity and strength of the subframe 15 (particularly, the portion supporting the left front connecting portion 81 of the left suspension support portion 35) can be secured.
- the load input from the front mounting portion 16 a (see FIG. 2) of the left suspension arm 16 to the left front connecting portion 81 can be suitably supported by the subframe 15.
- the portion of the subframe 15 adjacent to the right suspension support portion 37 also has upper vertical ribs 48c and 48d, upper horizontal ribs 49c and 49d, lower vertical ribs 66c, Reinforced by the lower horizontal ribs 67d and 67e. Therefore, it is possible to ensure the rigidity and strength of the subframe 15 (particularly, the portion that supports the right front connection portion 87 of the right suspension support portion 37). As a result, the load input from the front mounting portion 17 a (see FIG. 2) of the right suspension arm 17 to the right front connecting portion 87 can be suitably supported by the subframe 15 as with the left front connecting portion 81.
- an upper crossing portion 93, an upper outer crossing portion 94, and an upper inner crossing portion 95 are formed in the portion 41g of the upper portion 41 by the upper vertical ribs 48a and 48b and the upper horizontal ribs 49a and 49b. Therefore, the part 41g of the upper part 41 can be reinforced more favorably at the intersections 93, 94, 95.
- a lower front crossing portion 68 and a lower center outer crossing portion 69 are formed by a lower vertical rib 66a and lower horizontal ribs 67a and 67b in a portion 42g of the lower portion 42. Therefore, the portion 42g of the lower portion 42 can be reinforced more favorably at the intersecting portions 68 and 69. Thereby, the load input from the front mounting portion 16a (see FIG. 2) of the left suspension arm 16 to the left front coupling portion 81 can be more suitably supported by the subframe 15.
- the portion of the subframe 15 adjacent to the right suspension support portion 37 (the right front connection portion 87) is reinforced at each intersection as in the left side.
- the load input from the front mounting portion 17 a (see FIG. 2) of the right suspension arm 17 to the right front connecting portion 87 can be more suitably supported by the subframe 15 as with the left front connecting portion 81.
- the lower left outer vertical rib 66a formed in the lower portion 42 is provided apart from the left outer upper vertical rib 48a formed in the upper portion 41 at the outer side in the vehicle width direction. Further, the lower left inner vertical rib 66b formed in the lower portion 42 is provided away from the inner left in the vehicle width direction with respect to the left inner upper vertical rib 48b formed in the upper portion 41. Therefore, the lower left outer vertical rib 66a and the lower left inner vertical rib 66b are alternately formed in the vehicle width direction with respect to the left outer upper vertical rib 48a and the left inner upper vertical rib 48b.
- a left front lower horizontal rib 67a formed in the lower portion 42 is provided away from the vehicle rear side with respect to the left front upper horizontal rib 49a formed in the upper portion 41. Further, a left rear upper horizontal rib 49b formed on the upper portion 41 is provided apart from the left front lower horizontal rib 67a on the vehicle rear side. Furthermore, a left center lower horizontal rib 67b formed in the lower portion 42 is provided away from the vehicle rear side with respect to the left rear upper horizontal rib 49b formed in the upper portion 41.
- the left front lower horizontal rib 67a, the left center lower horizontal rib 67b, and the left rear lower horizontal rib 67c are alternately formed in the vehicle front-rear direction with respect to the left front upper horizontal rib 49a and the left rear upper horizontal rib 49b. Yes.
- a lower central horizontal rib 61 formed in the lower portion 42 is provided away from the front side of the vehicle with respect to the left front upper horizontal rib 49 a formed in the upper portion 41. Further, a left rear lower horizontal rib 67c formed in the lower portion 42 is provided apart from the left front upper horizontal rib 49a on the vehicle rear side. Further, a left inclined rib 64 formed in the lower portion 42 is provided away from the left rear lower horizontal rib 67c on the vehicle rear side. Therefore, the lower center horizontal rib 61, the left rear lower horizontal rib 67c, and the left inclined rib 64 are alternately formed in the vehicle front-rear direction with respect to the left front upper horizontal rib 49a.
- the lower vertical ribs 66a and 66b formed in the lower portion 42 are alternately formed in the vehicle width direction with respect to the upper vertical ribs 48a and 48b formed in the upper portion 41 (see FIG. 6). ).
- the lower horizontal ribs 61, 67 a, 67 b and 67 c formed on the lower portion 42 are respectively connected to the upper horizontal ribs 49 a and 49 b formed on the upper portion 41. They were formed alternately in the front-rear direction.
- left inclined ribs 64 formed in the lower portion 42 are alternately formed in the vehicle longitudinal direction with respect to the upper horizontal ribs 49a and 49b.
- each upper vertical rib 48a, 48b, each lower vertical rib 66a, 66b, each upper horizontal rib 49a, 49b see FIG. 10 for 49b
- each lower horizontal rib 61, 67a, 67b, 67c. (Refer to FIG. 10 for 67a and 67b), and a portion where the left inclined rib 64 is formed
- a large cross-sectional area S1 of the hollow portion 45 can be secured.
- the cross-sectional area S1 can be ensured larger than the cross-sectional area S2 in which the ribs of the upper portion 41 and the lower portion 42 are overlapped.
- the upper vertical ribs 48 a and 48 b, the lower vertical ribs 66 a and 66 b, the upper horizontal ribs 49 a and 49 b, and the lower horizontal ribs 61, 67 a, 67 b, 67 c and 64 are formed in a concave vertical shape of the core unit 200. It is formed by a groove part or a lateral groove part.
- the core unit 200 has an upper vertical groove portion 204 and an upper horizontal groove portion 205 provided on the upper surface 201, and a lower vertical groove portion 206 and a lower horizontal groove portion 207 provided on the lower surface 202.
- Each upper vertical rib 48a, 48b is formed in the upper vertical groove portion 204
- each upper horizontal rib 49a, 49b is formed in the upper horizontal groove portion 205.
- the lower vertical ribs 206a and 66b are formed in the lower vertical groove portion 206
- the lower horizontal ribs 61, 67a, 67b, 67c and 64 are formed in the lower horizontal groove portion 207.
- the upper vertical groove portion 204 of the upper surface 201 and the lower vertical groove portion 206 of the lower surface 202 are alternately formed in the vehicle width direction.
- the upper horizontal groove part 205 of the upper surface 201 and the lower horizontal groove part 207 of the lower surface 202 are formed alternately with respect to the vehicle front-rear direction.
- the core thickness dimension L1 of the portion where the upper vertical groove portion 204 and the upper horizontal groove portion 205 are formed on the upper surface 201 can be secured larger than when the groove portions are overlapped.
- the core thickness dimension L2 of the portion where the lower vertical groove portion 206 and the lower horizontal groove portion 207 are formed on the lower surface 202 can be ensured larger than when the groove portions are overlapped.
- the strength of the core 200 can be ensured by ensuring a large core thickness dimension L1, L2.
- the core unit 200 is formed of core sand in a state of being divided into a left core 210 and a right core 220.
- the hollow portion 45 can be formed in the subframe 15 by using the core unit 200.
- the core unit 200 is composed of two left and right cores 210 and 220.
- the left core 210 is provided with a plurality of upper vertical grooves 214 a and a plurality of upper horizontal grooves 214 b (only one is shown) in the upper part 214.
- a plurality of upper vertical ribs 214 a and a plurality of upper horizontal grooves 214 b form a plurality of upper vertical ribs and a plurality of upper horizontal ribs 49 on the upper portion 41 (see FIG. 4) of the subframe 15.
- the left core 210 is provided with a plurality of baseboards on the outer periphery of the lower part 215. Further, the left core 210 has a plurality of upper protrusions 218 formed on the upper portion 214 and a plurality of lower protrusions formed on the lower portion 105.
- the base plate of the lower part 215 is supported by the movable mold 252 (see FIG. 14).
- the plurality of upper protrusions 218 are held by the upper core holding pins 253, and the plurality of lower protrusions are held by the lower core holding pins.
- the left core 210 can be held in the cavity 253 of the casting mold 250 shown in FIG. 14 (specifically, the left half 253a of the cavity 253).
- the upper left sand outlet 56 and the lower left rear sand outlet 75 are provided at portions facing each other, and are formed in the same shape. Further, the upper left inclined opening 58 and the lower left front sand discharge port 77 are provided at portions facing each other.
- a portion 210 a corresponding to the lower left rear sand discharge port 75 of the left core 210 is moved from the lower left rear sand discharge port 75 side.
- the lower left rear holding part 264 can be pressed.
- a portion 210b corresponding to the upper left sand outlet 56 in the left core 210 can be pressed by the upper left holding portion 265 from the upper left sand outlet 56 side.
- the rear core 210c of the left core 210 is applied with an equivalent supporting force coaxially from above and below by the lower left rear holding part 264 and the upper left holding part 265.
- the portion 210d corresponding to the lower left front sand discharge port 77 of the left core 210 can be pressed by the lower left front holding portion 266 from the lower left front sand discharge port 77 side.
- a portion 210e (upper protrusion 108) corresponding to the upper left inclined opening 58 in the left core 210 can be pressed by the upper core holding pin 253 from the upper left inclined opening 58 side. That is, the front portion 210f of the left core 210 is applied with a support force substantially coaxially from above and below by the lower left front holding portion 266 and the upper core holding pin 267. Further, by adjusting the position of the lower left front holding portion 266 to the position of the upper core holding pin 267, the left core 210 can be suitably held without increasing the number of sand discharge ports more than necessary.
- the lower left rear holding part 264 and the lower left front holding part 266 are provided in the movable mold 252, for example.
- the upper left holding part 265 and the upper core holding pin 267 are provided in the fixed mold 251, for example.
- the same support force can be applied coaxially from the vertical direction to the rear portion 210c of the left core 210, and further, the support force can be applied substantially coaxially from the vertical direction to the front portion 210f of the left core 210.
- the left core 210 is suitably held by the cavity 143 of the casting mold 250 (specifically, the left half 253a of the cavity 253).
- the right core 220 is a member that is substantially symmetrical with the left core 210. Therefore, when casting the sub-frame 15, the base board of the lower part 222 is supported by the movable mold 252 (see FIG. 14), like the left core 210.
- the plurality of upper protrusions 225 are held by the upper core holding pins 267, and the plurality of lower protrusions are held by the lower core holding pins.
- the right core 220 can be held in the cavity 270 of the casting mold 250 (specifically, the right half of the cavity 270) (see FIG. 14), similarly to the left core 210.
- the same support force can be applied to the rear part 220a of the right core 220 from the upper and lower directions coaxially by the lower right rear holding part 228 and the upper right holding part 229. Further, it is possible to apply a supporting force to the front portion 220b of the right core 220 substantially coaxially from above and below with the lower right front holding portion 131 and the upper core holding pin 267.
- the right core 220 can be suitably held without increasing the number of sand discharge ports more than necessary. Thereby, the right core 220 can be suitably held by the cavity 270 (specifically, the right half of the cavity 270) of the casting mold 250 (see FIG. 14).
- the left core 210 is held in the cavity 253 (specifically, the left half 270a of the cavity 270) when the subframe 15 is high-pressure cast with the casting mold 250 will be described with reference to FIG. .
- the left core 210 and the right core 220 are substantially symmetrical members, the left core 210 will be described as a representative example, and the description of the right core 220 will be omitted.
- the left core 210 is disposed on the movable mold 252, and the fixed mold 251 is clamped to dispose the left core 210 on the left half 270 a of the cavity 270.
- a portion 210 a corresponding to the lower left rear sand discharge port 75 (see FIG. 4) of the left core 210 is pressed by the lower left rear holding portion 264 of the movable mold 252.
- a portion 210 b corresponding to the upper left sand outlet 56 (see FIG. 14) of the left core 210 is pressed by the upper left holding portion 265 of the fixed mold 251. Therefore, the same supporting force F1 and F2 can be applied to the rear part 210c of the left core 210 coaxially from above and below by the lower left rear holding part 264 and the upper left holding part 265.
- a portion 210 d corresponding to the lower left front sand discharge port 77 (see FIG. 4) of the left core 210 is pressed by the lower left front holding portion 266 of the movable mold 252.
- a portion 210 e corresponding to the upper left inclined opening 58 (see FIG. 4) of the left core 210 is pressed by the upper core holding pin 267 of the fixed mold 251. Therefore, it is possible to apply the supporting forces F3 and F4 to the front portion 210f of the left core 210 substantially coaxially from above and below with the lower left front holding portion 266 and the upper core holding pin 267.
- the same supporting force F1 and F2 can be applied to the rear portion 210c of the left core 210 coaxially from the vertical direction. Further, it is possible to apply the supporting forces F3 and F4 to the front portion 210f of the left core 210 from the vertical direction substantially coaxially.
- the left core 210 can be prevented from being displaced (moved) by the molten molten metal.
- the thickness dimension T1 (see FIG. 4) of the subframe 15 can be formed uniformly.
- the thickness dimension T1 of the subframe 15 uniformly, it is possible to prevent a thick portion from being generated in the subframe 15 and to reduce the weight of the subframe 15.
- the strength of the subframe 15 can be stabilized over the entire frame.
- a lower central lateral rib 61 is provided on the lower portion 42 of the main body 32 in front of the left and right lower inclined ribs 64 and 65 in the vehicle.
- the lower center lateral rib 61 is provided at the front part in the vehicle front-rear rear direction in the vehicle width direction center 42k and extends toward the vehicle width direction.
- the lower central horizontal rib 61 is a parallel rib extending in parallel to the left rear lower horizontal rib 67c and the right rear lower horizontal rib 67f at a predetermined interval in the vehicle front-rear direction.
- the upper holding pin opening 47 in the vicinity of the left front connecting portion 81 is selected from the plurality of upper holding pin openings 47 provided in the upper portion 41 and described.
- the upper holding pin opening 47 in the vicinity of the left front connecting portion 81 is referred to as “upper holding pin opening or hole. Section 47A "will be described.
- the upper rib 102 is formed in a substantially U shape by the left front upper horizontal rib 49a, the left rear upper horizontal rib 49b, and the left outer upper vertical rib 48a. Yes.
- An upper holding pin opening 47A is formed in a circular shape in a portion 41l surrounded by the U-shaped upper rib 102.
- the part 41l surrounded by the upper rib 102 has an annular upper peripheral edge 103 that forms the periphery of the upper holding pin opening 47A.
- the wall thickness dimension T2 of the upper peripheral edge portion 103 is larger than the wall thickness dimension T1 of the subframe 15.
- a left front upper horizontal rib 49a and a left rear upper horizontal rib 49b are provided adjacent to the upper holding pin opening 47A and the upper peripheral edge 103.
- the upper holding pin opening 47 ⁇ / b> A and the upper peripheral edge 103 are surrounded by the U-shaped upper rib 102.
- the upper holding pin opening 47 ⁇ / b> A is reinforced by the upper peripheral edge 103 and the upper rib 102.
- the upper peripheral edge portion 103 and the upper rib 102 indicate that the upper holding pin opening portion 47A becomes a starting point of stress concentration. Can prevent.
- the upper holding pin opening 47A from becoming the starting point of stress concentration, it is possible to prevent the rigidity and strength of the subframe 15 from being lowered at the upper holding pin opening 47A.
- the baseboard opening 63 in the vicinity of the left front connecting portion 81 and the baseboard opening 63 at the center 42k in the vehicle width direction will be described by selecting from the plurality of baseboard openings 63 provided in the lower part 42. .
- the baseboard opening 63 in the vicinity of the left front connecting portion 81 is defined.
- the “baseboard opening (hole) 63A” and the baseboard opening 63 at the center 42k in the vehicle width direction will be described as “baseboard opening (hole) 63B”.
- the lower outer rib 106 is substantially U-shaped by the left front lower horizontal rib 67a, the left center lower horizontal rib 67b and the left lower outer vertical rib 66a. Is formed.
- a baseboard opening 63A is formed in a circular shape in a portion 42m surrounded by the U-shaped lower outer rib 106.
- the portion 42m surrounded by the lower outer rib 106 has an annular lower outer peripheral edge (peripheral edge) 107 that forms the periphery of the baseboard opening 63A.
- the wall thickness dimension T3 of the lower outer peripheral edge portion 107 is larger than the wall thickness dimension T1 of the subframe 15.
- the baseboard opening 63A and the lower outer peripheral edge 107 are surrounded by a U-shaped lower outer rib 106.
- the lower outer peripheral edge 107 is connected to a U-shaped lower outer rib 106. Specifically, the connecting portion 107a of the lower outer peripheral edge portion 107 is connected to the left front lower horizontal rib 67a, and the connecting portion 107b of the lower outer peripheral edge portion 107 is connected to the left center lower horizontal rib 67b. Further, the connecting portion 107c of the lower outer peripheral edge portion 107 is connected to the lower left outer vertical rib 66a.
- the baseboard opening 63A is reinforced by the lower outer peripheral edge 107 and the lower outer rib 106.
- the lower outer peripheral edge portion 107 and the lower outer rib indicate that the baseboard opening 63A becomes a starting point of stress concentration.
- 106 can prevent this.
- the skirting board opening 63A from being the starting point of stress concentration, it is possible to prevent the rigidity and strength of the subframe 15 from being lowered at the skirting board opening 63A.
- the lower inner rib 111 is formed in a substantially U shape by the lower center horizontal rib 61, the left rear lower horizontal rib 67c, and the lower left inner vertical rib 66b.
- a baseboard opening 63B is formed in a circular shape in a portion 42n surrounded by the U-shaped lower inner rib 111.
- the part 42n surrounded by the lower inner rib 111 has an annular lower inner peripheral edge 112 that forms the periphery of the baseboard opening 63B.
- the thickness T4 (not shown) of the lower inner peripheral edge 112 is larger than the thickness T1 (see FIG. 17) of the subframe 15.
- the baseboard opening 63B and the lower inner peripheral edge 112 are surrounded by a U-shaped lower inner rib 111.
- the baseboard opening 63B is reinforced by the lower inner peripheral edge 112 and the lower inner rib 111.
- the lower inner peripheral edge 112 and the lower inner The rib 111 can prevent this.
- the baseboard opening 63B from becoming the starting point of stress concentration, it is possible to prevent the rigidity and strength of the subframe 15 from being lowered at the baseboard opening 63B.
- the upper holding pin opening 47A is reinforced by the upper peripheral edge 103 and the upper rib 102, and the baseboard opening 63A is formed by the lower outer peripheral edge 107 and the lower outer rib 106. It is reinforced. Therefore, the upper core holding pin 253 (see FIG. 24) can be arranged in the portion 41g adjacent to the left suspension support portion 35 (left front connecting portion 81), and the baseboard 235A (see FIG. 21) can be arranged in the adjacent portion 42g.
- the baseboard opening 63B is reinforced by the lower inner peripheral edge 112 and the lower inner rib 111. Therefore, the lower core holding pin can be arranged at the center 42k in the vehicle width direction.
- the core unit 200 (see FIG. 18) can be suitably arranged with the upper core holding pin 253, the baseboard 235A, and the lower core holding pin, so that the thickness T1 of the subframe 15 (See FIG. 5) can be formed uniformly.
- the core unit 200 used when casting the subframe 15 will be described with reference to FIGS. As shown in FIGS. 18 and 19, the core unit 200 is formed of core sand in a state of being divided into a left core 210 and a right core 220.
- the hollow portion 45 can be formed in the subframe 15 by using the core unit 200.
- the left core 210 is provided with a plurality of upper vertical grooves 227 and a plurality of upper horizontal grooves 228 in the upper portion 224.
- the upper vertical ribs 48 and the upper horizontal ribs 49 are formed on the upper portion 41 of the subframe 15 by the plurality of upper vertical grooves 227 and the plurality of upper horizontal grooves 228.
- the left core 210 is provided with a plurality of lower vertical grooves 231, a plurality of lower horizontal grooves 232, and inclined grooves 233 in the lower part 225.
- a plurality of lower vertical grooves 231, a plurality of lower horizontal grooves 232 and inclined grooves 233 are provided on the lower portion 42 of the subframe 15 shown in FIG. Inclined ribs 64 are formed.
- the left core 210 is provided with a plurality of baseboards 235 on the outer periphery of the lower portion 225.
- the baseboard 235 in the vicinity of the left front connecting portion 81 is selected from the plurality of baseboards 235 provided in the lower portion 225 and described.
- the baseboard 235 in the vicinity of the left front connecting portion 81 will be described as “baseboard 235A” in order to distinguish it from other baseboards 235.
- a baseboard 235A is provided in the vicinity of the left front connecting portion 81 (see FIG. 8), a lower peripheral edge recess 236 is formed around the baseboard 235A, and a lower lateral groove 132 is formed on both outer sides of the lower peripheral edge recess 236. Is formed.
- the left core 210 has a plurality of upper protrusions 238 (see FIG. 20) protruding from the upper part 224.
- the upper protrusion 238 in the vicinity of the left front connecting portion 81 is selected from the plurality of upper protrusions 238 provided on the upper portion 224 for description.
- the upper protrusion 238 in the vicinity of the left front connecting portion 81 will be described as “upper protrusion 238A” in order to distinguish it from other upper protrusions 238.
- an upper protrusion 238 ⁇ / b> A is provided in the vicinity of the left front connecting portion 81 (see FIG. 6), an upper peripheral recess 239 is formed around the upper protrusion 238 ⁇ / b> A, and an upper lateral groove 228 is formed on both outer sides of the upper peripheral recess 239. Is formed.
- the left core 210 has a plurality of lower protrusions 241 (see also FIG. 20) protruding from the lower portion 225.
- the base plate 235A of the lower part 225 is supported by the movable mold 251 of the casting mold 250. Further, a plurality of lower protrusions 241 (see FIG. 19) are held by a movable die 251 (specifically, a lower core holding pin). Further, as shown in FIG. 24, the upper protrusion 238A is held by a fixed mold 252 (specifically, the upper core holding pin 253) of the casting mold 250. As a result, the left core 210 can be held in the cavity 270 of the casting mold 250 (specifically, the left half of the cavity 270).
- the right core 220 is a member that is substantially symmetrical with the left core 210. Therefore, when casting the sub-frame 15 (see FIG. 3), the base 244 of the lower portion 225 is supported by the movable die 251 (see FIG. 23) in the same manner as the left core 210. Further, the plurality of lower protrusions 245 are held by the lower core holding pins. Further, the plurality of upper protrusions 246 are held by the upper core holding pins 253 (see FIG. 24). As a result, the right core 220 can be held in the cavity 255 of the casting mold 250 (specifically, the right half of the cavity 255) (see FIG. 24) in the same manner as the left core 210.
- the subframe 15 (see FIG. 3) can be cast by filling the cavity 255 with a molten aluminum alloy.
- the core unit 200 (see FIG. 18) can be suitably arranged with the upper core holding pin 253, the baseboard 235A, and the lower core holding pin in a state where the cavity 255 is filled with the molten aluminum alloy, the subframe 15 Thickness T1 (see FIG. 5) can be formed uniformly.
- sub-frame of the vehicle according to the present invention is not limited to the above-described embodiment, and can be changed or improved as appropriate.
- the subframe 15 made of aluminum alloy has been described.
- the present invention is not limited to this, and the present invention can be applied to other metals.
- the present invention is not limited to this, and the present invention can be applied to other castings.
- the shapes and configurations of the core unit, the skirting board, the upper core holding pins, and the like are not limited to those illustrated, and can be appropriately changed.
- the present invention is suitable for application to an automobile provided with a subframe that is provided below the vehicle body and supports the left suspension at the left end and the right suspension at the right end.
- SYMBOLS 10 Vehicle body front part structure, 15 ... Sub-frame (vehicle sub-frame), 16, 17 ... Left and right suspension arm (suspension arm), 21, 22 ... Left and right suspension (suspension), 25 ... Power plant, 26 ... Torque rod (connecting member), 32 ... body part, 32a ... left end part of body part, 32b ... right end part of body part, 35, 37 ... left and right suspension support parts, 38 ... central connection part, 41 ... upper part, 41g, 42g: a part adjacent to the left suspension support part, 42 ... a lower part, 42k ... a center in the vehicle width direction (a part adjacent to the connecting part), 47A ...
- an upper holding pin opening part (hole part), 48 ... an upper vertical rib (vertical rib) ), 48a: left outer upper vertical rib (crossing rib), 49: upper horizontal rib (horizontal rib), 49a, 49c: left and right front upper horizontal ribs (parallel rib), 49b, 49d: left and right Rear upper horizontal rib (rib), 52 ... upper parallel part, 54 ... upper inclined part (inclined part), 56 ... upper left sand outlet (upper opening), 57 ... upper right sand outlet (upper opening), 58 ... Upper left inclined opening (inclined opening), 59 ... upper right inclined opening (inclined opening), 61 ... lower central lateral rib (parallel rib), 62, 62A ...
- lower holding pin opening (hole), 63, 63A 63B, 63C ... skirting board openings (holes), 64, 65 ... left and right inclined ribs (ribs), 66 ... lower vertical ribs (vertical ribs), 66b, 66d ... left and right lower inner vertical ribs (crossing ribs) 67 ... Lower horizontal ribs (horizontal ribs), 67c, 67f ... Left and right rear lower horizontal ribs (ribs), 71 ... Lower rear parallel portions (lower parallel portions), 75 ... Lower left rear rear sand discharge ports (lower openings), 76 ... Lower right rear sand outlet (lower opening), 77 ...
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Abstract
Description
さらにまた本発明では、本体部のうちサスペンション支持部に隣接する部位に縦リブや横リブを設けた。よって、サスペンション支持部に隣接する部位を縦リブや横リブで補強することにより、サブフレーム(特に、サスペンション支持部)の剛性・強度を確保できる。これにより、サスペンションアームからサスペンション支持部に入力する荷重をサブフレームで好適に支えることができる。
Claims (4)
- 中子を用いて一体に鋳造成形され、
前記中子で中空状に形成されることにより、上下方向に所定間隔をおいて設けられた上部および下部を有する本体部と、
該本体部の左右の端部に設けられ、左右のサスペンションを支持する左右のサスペンション支持部と、を備えた車両のサブフレームであって、
前記上部および前記下部にそれぞれ備えられ、車両前後方向において略平行となる上平行部および下平行部と、
該上平行部に形成された上開口部と、
該上開口部に対峙する前記下平行部において、前記上開口部と同等の形状に形成された下開口部と、
を含むことを特徴とする車両のサブフレーム。 - 前記上部は、該上部のうち車両前後方向の前部に設けられ、車両前方に向けて下り勾配に傾斜された傾斜部と、該傾斜部に形成された傾斜開口部とを有し、
前記下部は、前記傾斜開口部に対峙する前記下部に形成された前開口部を有する、請求項1記載の車両のサブフレーム。 - 前記本体部は、該本体部のうち前記サスペンション支持部に隣接する部位に設けられ、車両前後方向に延びる縦リブと、前記隣接する部位に設けられ、車幅方向に延びる横リブと、を有する車両のサブフレーム。
- 前記本体部は、車両の駆動源となるパワープラントを支持する連結部材が連結される連結部を備えており、
前記本体部は、前記連結部から前記本体部の外部に向けて延出されたリブと、前記リブの近傍に設けられ、前記中子を支える中子支持部で形成された穴部とを含む、車両のサブフレーム。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP14788066.0A EP2990304B1 (en) | 2013-04-26 | 2014-04-25 | Vehicle subframe |
MX2015014880A MX362852B (es) | 2013-04-26 | 2014-04-25 | Estructura auxiliar del vehiculo. |
BR112015026787A BR112015026787A2 (pt) | 2013-04-26 | 2014-04-25 | subarmação de veículo |
US14/786,349 US9776660B2 (en) | 2013-04-26 | 2014-04-25 | Vehicle subframe |
JP2015513843A JP6082104B2 (ja) | 2013-04-26 | 2014-04-25 | 車両のサブフレーム |
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EP (1) | EP2990304B1 (ja) |
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Cited By (4)
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US20150075896A1 (en) * | 2013-09-13 | 2015-03-19 | Honda Motor Co., Ltd. | Sub-frame for vehicle |
CN105667593A (zh) * | 2014-12-04 | 2016-06-15 | 铃木株式会社 | 悬臂固定构造 |
JP6039806B2 (ja) * | 2013-07-11 | 2016-12-07 | 株式会社エフテック | 車両用のサブフレーム |
US20220306201A1 (en) * | 2021-03-29 | 2022-09-29 | Honda Motor Co., Ltd. | Subframe |
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CN105143019B (zh) * | 2013-04-26 | 2017-03-22 | 本田技研工业株式会社 | 车辆的副架 |
JP6137144B2 (ja) * | 2014-11-27 | 2017-05-31 | トヨタ自動車株式会社 | サスペンションメンバ |
DE102015224852A1 (de) * | 2015-12-10 | 2017-06-14 | Volkswagen Aktiengesellschaft | Hilfsrahmen für ein Fahrzeug und Verfahren zur Herstellung eines Hilfsrahmens |
FR3059631B1 (fr) * | 2016-12-06 | 2019-06-14 | Renault S.A.S | Dispositif de liaison entre un longeron en aluminium de vehicule et un bras de suspension |
JP7272928B2 (ja) * | 2019-10-18 | 2023-05-12 | トヨタ自動車株式会社 | 車両用支持部材 |
JP2022152260A (ja) * | 2021-03-29 | 2022-10-12 | 本田技研工業株式会社 | サブフレーム |
IT202200011171A1 (it) * | 2022-05-27 | 2023-11-27 | Ferrari Spa | Metodo per realizzare mediante fusione un componente internamente cavo di un telaio di un veicolo stradale |
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- 2014-04-25 JP JP2015513843A patent/JP6082104B2/ja active Active
- 2014-04-25 WO PCT/JP2014/061665 patent/WO2014175414A1/ja active Application Filing
- 2014-04-25 US US14/786,349 patent/US9776660B2/en active Active
- 2014-04-25 CN CN201480022457.0A patent/CN105143018B/zh active Active
- 2014-04-25 MX MX2015014880A patent/MX362852B/es active IP Right Grant
- 2014-04-25 BR BR112015026787A patent/BR112015026787A2/pt not_active IP Right Cessation
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JP6039806B2 (ja) * | 2013-07-11 | 2016-12-07 | 株式会社エフテック | 車両用のサブフレーム |
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Also Published As
Publication number | Publication date |
---|---|
EP2990304A4 (en) | 2017-02-22 |
US9776660B2 (en) | 2017-10-03 |
MX2015014880A (es) | 2016-06-21 |
CN105143018B (zh) | 2017-08-08 |
MX362852B (es) | 2019-02-18 |
CN105143018A (zh) | 2015-12-09 |
JPWO2014175414A1 (ja) | 2017-02-23 |
EP2990304A1 (en) | 2016-03-02 |
US20160075379A1 (en) | 2016-03-17 |
EP2990304B1 (en) | 2018-07-04 |
BR112015026787A2 (pt) | 2017-07-25 |
JP6082104B2 (ja) | 2017-02-15 |
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