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WO2013005846A1 - Structure of vehicle component - Google Patents

Structure of vehicle component Download PDF

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Publication number
WO2013005846A1
WO2013005846A1 PCT/JP2012/067379 JP2012067379W WO2013005846A1 WO 2013005846 A1 WO2013005846 A1 WO 2013005846A1 JP 2012067379 W JP2012067379 W JP 2012067379W WO 2013005846 A1 WO2013005846 A1 WO 2013005846A1
Authority
WO
WIPO (PCT)
Prior art keywords
intermediate member
cast
torsion beam
steel plate
vehicle component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/067379
Other languages
French (fr)
Japanese (ja)
Inventor
松本　正春
禎浩 関根
俊三 青山
靖 菅野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ahresty Corp
Yorozu Corp
Original Assignee
Ahresty Corp
Yorozu Corp
Yorozu Jidosha Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ahresty Corp, Yorozu Corp, Yorozu Jidosha Kogyo KK filed Critical Ahresty Corp
Publication of WO2013005846A1 publication Critical patent/WO2013005846A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • 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
    • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B23K2103/20—Ferrous alloys and aluminium or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B60G2206/202—Constructional features of semi-rigid axles, e.g. twist beam type axles with a radially deformed tube as a cross member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7102—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/72—Steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8101—Shaping by casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8201—Joining by welding

Definitions

  • the present invention relates to the structure of parts for vehicles molded using dissimilar metals.
  • Vehicle parts for example, a torsion beam type suspension is provided with a trailing arm for attaching a wheel suspension member at both ends of a torsion beam extending in the width direction of the vehicle, and the overall structure is relatively simple. , Mainly used for front wheel drive cars.
  • the torsion beam, tension, bending force or compression force, etc. acts on the torsion beam used in this suspension through the trailing arm to which the wheel is connected from the up, down, left, right, front and back directions.
  • it is made of steel having high rigidity.
  • a hollow steel plate which is formed by pressing a torsion beam and to which a trailing arm is joined by welding.
  • Patent Document 1 a torsion beam and a trailing arm made of an aluminum alloy and welded together are also disclosed.
  • welding of aluminum alloy is not preferable for the torsion beam type suspension because it is troublesome and disadvantageous in cost.
  • the damper housing, joint parts and side frames used here are all in the form of a flat plate, and when casting the aluminum of the damper housing, the cast-in part of the joint parts shall be a straight plate and the uncast part A stepped portion is provided, and the hot water is blocked by the stepped portion so as not to get into the portion that can not be cast, and the deburring work is simplified.
  • the joint component to be cast is a flat plate, and the end of the flat plate is simply cast integrally, the bonding state with the aluminum alloy damper housing is weak in bonding strength, and the damper is If a tensile load is applied to the joint between the housing and the connecting part, the connecting part may come out of the damper housing.
  • a cast-in structure is adopted as a suspension in which a torsional force, a tensile force, a bending force or a compressive force is exerted from above and below, left and right, front and back.
  • the present invention has been made to solve the problems associated with the above-mentioned prior art, and it is possible to further reduce the weight and to obtain high bonding strength and high rigidity even for various forces acting from all directions. It is an object of the present invention to provide a structure of parts for vehicles that is advantageous in terms of cost and cost.
  • the vehicle component structure according to the present invention achieves the above object by providing a connecting intermediate member made of steel plate between a first component made of aluminum die cast and a second component made of steel plate, and In a vehicle component having one end integrally cast at the time of die casting of the first part and the other end welded and connected to the second part, the intermediate member has a cylindrical shape at the other end. And a straight tube portion which is formed so as to be inscribed in or out of contact with the end portion of the second part, and one end of the cast-in side extends parallel to the axis of the intermediate member; And a stepped portion formed at an end portion.
  • the intermediate member made of steel plate when the intermediate member made of steel plate is interposed between the first component made of aluminum die cast and the second component made of steel plate, the other end portion of the intermediate member is A cylindrical portion is formed in contact with the end portion of the second part, and one end portion on the cast-in side is formed at at least the end portion of the straight pipe portion extending parallel to the axis and Because the intermediate member is connected to the first part via the stepped portion on the cast-in side, the connecting strength is enhanced, and the intermediate member is cylindrically shaped with the second part. The parts are to be connected, resulting in an extremely high strength and high rigidity vehicle component as a whole. In addition, since the stepped portion is easily formed and is not joining of aluminum alloys, it is easy to manufacture and advantageous in cost.
  • the intermediate member since the axis-perpendicular cross-sectional shape of the cast-in portion of the intermediate member is formed into a polygonal shape or an elliptical shape whose corner portions are arc-shaped, the intermediate member itself has high strength and high rigidity. As a result, the strength as a whole of the vehicle component also increases.
  • the first part is the trailing member and the second part is the torsion beam suspension of the torsion beam, it is lightweight, and it is lightweight against torsional force, tensile force, bending force or compressive force from all directions. High strength, high rigidity, manufacturing and cost-effective suspension.
  • FIG. 1 is a schematic perspective view of a torsion beam type suspension to which a vehicle component according to an embodiment of the present invention is applied.
  • FIG. 2 is a plan view of the vehicle component.
  • FIG. 3 is a schematic perspective view showing an end of the torsion beam.
  • FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.
  • FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.
  • the component for vehicles which concerns on this embodiment is a torsion beam type suspension for passenger cars.
  • the left and right trailing arms 1 are connected to respective ends of a torsion beam 2 extending in the width direction of the vehicle body.
  • the base end portion 3 of the trailing arm 1 is rotatably connected to the vehicle body via a bush at a position forward of the torsion beam 2 to the vehicle body, and a hub 5 to which a wheel is attached outside is provided on the tip 4 side.
  • a suspension 6 is provided on the inside.
  • a coil spring 8 is provided on a support plate 7, and one end of a shock absorber 10 is attached to the attachment portion 9.
  • the trailing arm 1 (first component) is made of aluminum die cast, and the torsion beam 2 (second component) is made of steel plate, and between the two, as shown in FIG.
  • An intermediate member 11 made of steel plate is provided to connect the torsion beam 2 and the torsion beam 2.
  • the torsion beam 2 made of a steel plate is a quadrangle in which the left and right end portions 2a connected with the trailing arm 1 and the vicinity thereof are expanded wider than the middle portion 2b, and the cross-sectional shape is a circular arc. It has a cylindrical shape (see Figure 5). In this way, one having a high connection strength with the trailing arm 1 is obtained, which is preferable.
  • the shape of the left and right end portions 2a does not necessarily have to be a square cylindrical shape, and may be any shape such as an elliptical cylindrical shape or a cylindrical shape as long as it has high rigidity.
  • the intermediate portion 2 b of the torsion beam 2 is configured to have an open cross-sectional shape opened toward the front. In this way, water droplets do not enter from the vertical direction, and it is possible to cope with the twisting force, and the overall weight is reduced.
  • the cross-sectional shape of the intermediate portion 2b does not necessarily have to be an open cross-sectional shape opened forward, and may be an open cross-sectional shape opened rearward, upward, or downward.
  • the intermediate member 11 is provided such that one end 11 a is in contact with the end of the torsion beam 2, and is welded to the torsion beam 2.
  • the end 11a on the side of the torsion beam 2 of the intermediate member 11 has an axis-perpendicular cross-sectional shape similar to the cross-sectional shape of the end 2a of the torsion beam 2 with arced corner portions. It has a square shape. In this way, the cross-sectional coefficient of the left and right end portions 2a of the torsion beam 2 is increased, and the torsion beam 2 is welded around the entire circumference, and the strength becomes excellent. Further, since both the intermediate member 11 and the torsion beam 2 are made of steel plates, they can be easily welded without problems, which is also advantageous in cost.
  • the other end 11 b of the intermediate member 11 is integrally cast-wrapped when the trailing arm 1 is die-casted.
  • the portion to be cast and wrapped is referred to as a cast-in portion 12.
  • the cast-in portion 12 is a straight pipe portion 11d extending in parallel with the axis of the intermediate member 11, and a stepped portion 11e formed at one end of the straight pipe portion 11d. And are formed to have.
  • the cast-in portion 12 of the intermediate member 11 is cast-wrapped at the time of die-casting the trailing arm 1, the die-cast portion is in an unevenly fitted state with the stepped portion 11e.
  • the connection strength with the intermediate member 11 is enhanced, and the joint strength is high against torsional force, tensile force, bending force or compression force from all directions, and there is no possibility that the intermediate member 11 may come out of the die cast portion, and extremely high strength Become highly rigid.
  • the intermediate member 11 of the present embodiment is a cylindrical body having a stepped portion 11e formed at one end and extending straight along the axis to the other end, and forming the stepped portion 11e Also, the entire shape is simple, and the setting at the time of casting operation becomes easy, which is advantageous also in terms of manufacturing workability and manufacturing cost.
  • the stepped portion 11e of the present embodiment is expanded outward, but the present invention is not limited to this, and it is not limited as long as the intermediate member 11 does not come out of the die cast molding portion It may be formed in any shape, may be deformed radially inward, or may be formed by deforming in a zigzag shape or the like. Further, the end portion 11 a may be inscribed with the torsion beam 2 instead of being in a state of being inscribed with the torsion beam 2.
  • the intermediate member 11 may form the through hole 13 in the straight pipe portion 11 d. If the through hole 13 is formed in the straight pipe portion 11 d, hot water flows through the through hole 13 at the time of cast molding, and when it is solidified, the die cast portion and the intermediate member 11 are aluminum alloy solidified in the through hole 13 Will be linked by As a result, when a bending load or the like acts on the rectangular or elliptical intermediate member 11 whose rectangular cross-sectional shape is formed into an arc shape at the corner portion, a portion covering the radially outer side of the intermediate member 11 (The aluminum skin portion) follows and deforms the intermediate member 11, the followability of the aluminum skin portion to the intermediate member 11 is improved, and the peeling of the aluminum skin portion is prevented.
  • the number of the through holes 13 is not limited to one, and as shown in FIG. 5, if a plurality of through holes 13 are formed, the number of connecting portions by the solidified aluminum alloy becomes plural, and the effect of preventing peeling is further enhanced. Further, the through hole 13 may be formed not only in the straight pipe portion 11 d but also in the stepped portion 11 e.
  • the trailing arm 1 is formed by casting. In this casting, it is not necessary to use a high vacuum die casting method etc., and a normal die casting method may be used. If high vacuum die casting is used, the gas contained in the product after casting is reduced, and there is an advantage that welding defects are reduced when welding is performed later, but in the present embodiment, the trailing arm 1 and the torsion beam 2 There is no need to use a cost disadvantaged high vacuum die casting method because
  • the cast-in portion 12 of the intermediate member 11 is set in a mold, and the cast-in portion 12 of the intermediate member 11 is cast and wrapped when the trailing arm 1 is formed.
  • the hot water made of an aluminum alloy flows so as to wrap around the casting portion 12 having the stepped portion 11 e and also flows through the through holes 13 opened in the intermediate member 11. Then, when this solidifies, the die cast portion and the intermediate member 11 are connected by the aluminum alloy solidified in the through hole 13.
  • a force in the tension direction that is, a direction in which the intermediate member 11 is detached from the die cast molding
  • a force in the tension direction that is, a direction in which the intermediate member 11 is detached from the die cast molding
  • the aluminum alloy solidified in the engagement state of the die cast molding portion and the stepped portion 11 e or in the through hole 13 opposes this.
  • the portion (aluminum skin portion) covering the radially outer side of the intermediate member 11 follows the intermediate member 11 and deforms, and the followability of the aluminum skin portion to the intermediate member 11 is improved, and the aluminum skin is improved. Peeling of parts is prevented.
  • the end 2a of the torsion beam 2 formed in advance by press forming or liquid pressure forming is inserted into the end 11a of the intermediate member 11, and both are joined by welding.
  • the intermediate member 11 is made of a steel plate
  • the torsion beam 2 is also made of a steel plate. Therefore, the two members can be joined without any problem.
  • the trailing arm 1 and the torsion beam 2 of different metals can be easily connected without performing troublesome work of welding aluminum alloys or welding of different metals.
  • the present invention is not limited to the embodiments described above, and various modifications can be made by those skilled in the art within the technical concept of the present invention.
  • the embodiments described above have described a torsion beam type suspension for a vehicle, the invention is not limited to this alone, as can be applied to various vehicle components using dissimilar metals such as front or rear subframes Can be implemented.
  • the present invention can be suitably used for a torsion beam type suspension made of a dissimilar metal material which is light in weight, difficult to deform, easy to manufacture, and advantageous in cost, and is highly reliable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vehicle Body Suspensions (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Body Structure For Vehicles (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

[Problem] To provide the structure of a vehicle component which achieves weight reduction, has high bonding strength and high rigidity against torsional force, tensile force, bending force, or compressive force from all directions, and has manufacturing and cost advantages. [Solution] A vehicle component has a configuration such that an intermediate member (11) produced from a steel plate is provided between an aluminum die-cast trailing arm (1) and a torsion beam (2) produced from a steel plate, one end of the intermediate member (11) is bonded to the torsion beam (2) by welding, and the other end (11a) is integrally insert-cast when the trailing arm (1) is die-cast molded, the vehicle component being characterized in that the intermediate member (11) is molded such that one end is in internal or external contact with an end of the tubular torsion beam (2), and an insert-cast portion (12) comprises a linear tube section (11d) extending parallel to the axis of the intermediate member (11) and a stepped section (11e) formed at at least an end (11b) of the linear tube section (11d).

Description

車両用部品の構造Structure of parts for vehicles

　本発明は、異種金属を用いて成形する車両用部品の構造に関する。 BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the structure of parts for vehicles molded using dissimilar metals.

　車両用部品、例えば、トーションビーム式サスペンションは、車両の幅方向に伸延するトーションビームの両端部に、車輪懸架部材を取り付けるトレーリングアームが設けられたものであり、全体的構造が比較的シンプルなことから、主に前輪駆動車に使用されている。 Vehicle parts, for example, a torsion beam type suspension is provided with a trailing arm for attaching a wheel suspension member at both ends of a torsion beam extending in the width direction of the vehicle, and the overall structure is relatively simple. , Mainly used for front wheel drive cars.

　このサスペンションに使用されているトーションビームに対しては、車輪が連結されているトレーリングアームなどを介して捩り力、引張り力、曲げ力あるいは圧縮力などが上下、左右、前後の方向から作用するので、従来から高剛性を有する鋼材により構成されている。しかし、車両の軽量化の要請から、トーションビームをプレス成形した中空の鋼板とし、これにトレーリングアームを溶接接合しているものが用いられるようになっている。 The torsion beam, tension, bending force or compression force, etc., acts on the torsion beam used in this suspension through the trailing arm to which the wheel is connected from the up, down, left, right, front and back directions. Conventionally, it is made of steel having high rigidity. However, in order to reduce the weight of the vehicle, it has become possible to use a hollow steel plate which is formed by pressing a torsion beam and to which a trailing arm is joined by welding.

　最近では、さらなる軽量化の要請から、トーションビーム及びトレーリングアームをアルミニウム合金により構成し、両者を溶接接合したものも開示されている（下記特許文献１）。しかし、アルミニウム合金の溶接は、面倒でコスト的にも不利なことから、トーションビーム式サスペンションには好ましくない。 Recently, in view of the demand for further weight reduction, a torsion beam and a trailing arm made of an aluminum alloy and welded together are also disclosed (Patent Document 1 below). However, welding of aluminum alloy is not preferable for the torsion beam type suspension because it is troublesome and disadvantageous in cost.

　また、アルミニウム合金同士の溶接を回避するため、例えば、アルミニウム合金と鋼板とを結合する場合に、つなぎ部品を使用し、つなぎ部品の一端を、いわゆる鋳込み、他端を溶接により連結する構造を有するものもある（下記特許文献２）。この特許文献２に開示されているものは、車両のダンパハウジングをアルミニウム合金、サイドフレームを鋼板により構成し、両者を接合する場合に、鋼板製のつなぎ部品を使用し、つなぎ部品の一端をダンパハウジングの鋳造成形時に一緒に鋳込み、つなぎ部品の他端をサイドフレームに溶接接合し、アルミニウム合金と鋼板という異種金属の結合を容易に行うことができるようにしている。ここで使用されているダンパハウジング、つなぎ部品及びサイドフレームは、全て平板状をしたもので、ダンパハウジングのアルミ鋳造時に、つなぎ部品の鋳込まれる部分は直状板とし、鋳込まれない部分に段差部を設け、湯が段差部により堰き止められ、鋳込まれない部分にまで入り込まないようにし、バリ取り作業の簡素化を図っている。 In addition, in order to avoid welding of aluminum alloys, for example, when joining an aluminum alloy and a steel plate, a joint component is used, and one end of the joint component is so-called cast-in and the other end is connected by welding. There is also a thing (following patent document 2). In the case disclosed in this patent document 2, when the damper housing of the vehicle is made of aluminum alloy and the side frame is made of steel plate and the both are joined, a steel steel joint component is used and one end of the joint component is damper At the time of casting of the housing, they are casted together, and the other end of the joint part is welded to the side frame so that it is possible to easily bond dissimilar metals of aluminum alloy and steel plate. The damper housing, joint parts and side frames used here are all in the form of a flat plate, and when casting the aluminum of the damper housing, the cast-in part of the joint parts shall be a straight plate and the uncast part A stepped portion is provided, and the hot water is blocked by the stepped portion so as not to get into the portion that can not be cast, and the deburring work is simplified.

特開２０１０－６９９６３号公報JP, 2010-69963, A 特開２０１０－１９４５８３号公報Unexamined-Japanese-Patent No. 2010-194583

　ところが、鋳込まれるつなぎ部品は平板であり、この平板の端部を単に一体的に鋳包んでいるのみであるため、アルミニウム合金製のダンパハウジングとの接合状態は、接合強度的に弱く、ダンパハウジングとつなぎ部品の接合部分に引張り荷重がかかると、ダンパハウジングからつなぎ部品が抜け出るおそれがある。特に、捩り力、引張り力、曲げ力あるいは圧縮力などが上下、左右、前後の方向から作用するサスペンションを、このような鋳込み構造とすることは、強度あるいは剛性の面で好ましくない。 However, since the joint component to be cast is a flat plate, and the end of the flat plate is simply cast integrally, the bonding state with the aluminum alloy damper housing is weak in bonding strength, and the damper is If a tensile load is applied to the joint between the housing and the connecting part, the connecting part may come out of the damper housing. In particular, it is not preferable from the viewpoint of strength or rigidity that such a cast-in structure is adopted as a suspension in which a torsional force, a tensile force, a bending force or a compressive force is exerted from above and below, left and right, front and back.

　本発明は、上記従来技術に伴う課題を解決するためになされたもので、さらなる軽量化を図ると共に、あらゆる方向から作用する種々の力に対しても、接合強度が高く、高剛性で、製造的にもコスト的にも有利な、車両用部品の構造を提供することを目的とする。 The present invention has been made to solve the problems associated with the above-mentioned prior art, and it is possible to further reduce the weight and to obtain high bonding strength and high rigidity even for various forces acting from all directions. It is an object of the present invention to provide a structure of parts for vehicles that is advantageous in terms of cost and cost.

　上記目的を達成する本発明に係る車両用部品の構造は、アルミダイキャスト製の第１部品と鋼板製の第２部品との間に、鋼板製の繋ぎ用中間部材を設け、当該中間部材の一端部を前記第１部品のダイキャスト成形時に一体的に鋳包み、他端部を前記第２部品と溶接接合してなる車両用部品において、前記中間部材は、前記他端部が筒状をした前記第２部品の端部と内接若しくは外接するように成形され、前記鋳包み側の一端部が前記中間部材の軸線と並行に伸延する直状管部と、当該直状管部の少なくとも端部に形成された段付き部と、を有するように形成したことを特徴とする。 The vehicle component structure according to the present invention achieves the above object by providing a connecting intermediate member made of steel plate between a first component made of aluminum die cast and a second component made of steel plate, and In a vehicle component having one end integrally cast at the time of die casting of the first part and the other end welded and connected to the second part, the intermediate member has a cylindrical shape at the other end. And a straight tube portion which is formed so as to be inscribed in or out of contact with the end portion of the second part, and one end of the cast-in side extends parallel to the axis of the intermediate member; And a stepped portion formed at an end portion.

　請求項１の発明によれば、アルミダイキャスト製の第１部品と鋼板製の第２部品相互間に鋼板製の中間部材を介在させて両部品を繋ぐ場合に、中間部材の他端部は筒状をした前記第２部品の端部と接するように筒状とし、鋳包み側の一端部は軸線と並行に伸延する直状管部と、直状管部の少なくとも端部に形成された段付き部とを有する構成としたので、中間部材は、鋳包み側では第１部品と段付き部を介して連結されることになり、連結強度が高まり、また、第２部品とは筒状部分が連結されることになり、全体的に極めて高強度で高剛性な車両用部品となる。しかも、段付き部の成形は容易であり、アルミニウム合金同士の接合ではないため、製造が容易でコスト的にも有利となる。 According to the invention of claim 1, when the intermediate member made of steel plate is interposed between the first component made of aluminum die cast and the second component made of steel plate, the other end portion of the intermediate member is A cylindrical portion is formed in contact with the end portion of the second part, and one end portion on the cast-in side is formed at at least the end portion of the straight pipe portion extending parallel to the axis and Because the intermediate member is connected to the first part via the stepped portion on the cast-in side, the connecting strength is enhanced, and the intermediate member is cylindrically shaped with the second part. The parts are to be connected, resulting in an extremely high strength and high rigidity vehicle component as a whole. In addition, since the stepped portion is easily formed and is not joining of aluminum alloys, it is easy to manufacture and advantageous in cost.

　請求項２の発明によれば、前記中間部材の鋳包み部分の軸直角断面形状を、角部が円弧状とされた多角形状若しくは楕円形状に形成したので、中間部材自体が高強度で高剛性になり、車両用部品全体としての強度も高まる。 According to the invention of claim 2, since the axis-perpendicular cross-sectional shape of the cast-in portion of the intermediate member is formed into a polygonal shape or an elliptical shape whose corner portions are arc-shaped, the intermediate member itself has high strength and high rigidity. As a result, the strength as a whole of the vehicle component also increases.

　請求項３の発明によれば、第１部品がトレーリング部材、第２部品がトーションビームのトーションビーム式サスペンションであるため、軽量で、あらゆる方向からの捩り力、引張り力、曲げ力あるいは圧縮力に対して高強度、高剛性で、製造的、コスト的にも有利なサスペンションとなる。 According to the invention of claim 3, since the first part is the trailing member and the second part is the torsion beam suspension of the torsion beam, it is lightweight, and it is lightweight against torsional force, tensile force, bending force or compressive force from all directions. High strength, high rigidity, manufacturing and cost-effective suspension.

図１は、本発明の実施形態に係る車両用部品を適用したトーションビーム式サスペンションの概略斜視図である。FIG. 1 is a schematic perspective view of a torsion beam type suspension to which a vehicle component according to an embodiment of the present invention is applied. 図２は、同車両用部品の平面図である。FIG. 2 is a plan view of the vehicle component. 図３は、トーションビームの端部を示す概略斜視図である。FIG. 3 is a schematic perspective view showing an end of the torsion beam. 図４は、図２の４－４線に沿う断面図である。FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 図５は、図４の５－５線に沿う断面図である。FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.

　以下、本発明の実施形態を、図面を参照しつつ説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

　本実施形態に係る車両用部品は、乗用車のトーションビーム式サスペンションである。このサスペンションは、図１に示すように、左右のトレーリングアーム１が、車体の幅方向に延在するトーションビーム２の各端部に連結されている。 The component for vehicles which concerns on this embodiment is a torsion beam type suspension for passenger cars. In this suspension, as shown in FIG. 1, the left and right trailing arms 1 are connected to respective ends of a torsion beam 2 extending in the width direction of the vehicle body.

　トレーリングアーム１の基端部３は、トーションビーム２よりも車体の前方位置で車体にブッシュを介して回動可能に連結され、先端部４側においては、外側に車輪が取り付けられるハブ５が設けられ、内側に懸架部６が設けられている。懸架部６は、支持プレート７にコイルスプリング８が設けられ、取付部９にショックアブソーバ１０の一端が取り付けられている。 The base end portion 3 of the trailing arm 1 is rotatably connected to the vehicle body via a bush at a position forward of the torsion beam 2 to the vehicle body, and a hub 5 to which a wheel is attached outside is provided on the tip 4 side. And a suspension 6 is provided on the inside. In the suspension portion 6, a coil spring 8 is provided on a support plate 7, and one end of a shock absorber 10 is attached to the attachment portion 9.

　本実施形態では、トレーリングアーム１（第１部品）はアルミダイキャスト製であり、トーションビーム２（第２部品）は鋼板製で、両者間には、図２に示すように、トレーリングアーム１とトーションビーム２を繋ぐ鋼板製の中間部材１１が設けられている。ここにおいて、鋼板製のトーションビーム２は、トレーリングアーム１と連結される左右端部２ａ及びその近傍が、中間部２ｂより末広がりに拡開され、その断面形状は角部が円弧状とされた四角形の筒状をしている（図５参照）。このようにすれば、トレーリングアーム１との連結強度が高いものが得られることになり、好ましい。なお、左右端部２ａの形状は、必ずしも四角筒形状である必要はなく、高い剛性を有するものであれば楕円筒形状、円筒形状など、どのような形状であってもよい。 In the present embodiment, the trailing arm 1 (first component) is made of aluminum die cast, and the torsion beam 2 (second component) is made of steel plate, and between the two, as shown in FIG. An intermediate member 11 made of steel plate is provided to connect the torsion beam 2 and the torsion beam 2. In this case, the torsion beam 2 made of a steel plate is a quadrangle in which the left and right end portions 2a connected with the trailing arm 1 and the vicinity thereof are expanded wider than the middle portion 2b, and the cross-sectional shape is a circular arc. It has a cylindrical shape (see Figure 5). In this way, one having a high connection strength with the trailing arm 1 is obtained, which is preferable. The shape of the left and right end portions 2a does not necessarily have to be a square cylindrical shape, and may be any shape such as an elliptical cylindrical shape or a cylindrical shape as long as it has high rigidity.

　トーションビーム２の中間部２ｂは、図３に示すように、前方向かって開放された開断面形状となるように構成されている。このようにすれば、上下方向から水滴が入り込むことがなく、捩じり力にも対応でき、全体的に軽量なものとなる。なお、この中間部２ｂの断面形状は、必ずしも前方向かって開放された開断面形状である必要はなく、後方、上方あるいは下方に向かって開放された開断面形状であってもよい。 As shown in FIG. 3, the intermediate portion 2 b of the torsion beam 2 is configured to have an open cross-sectional shape opened toward the front. In this way, water droplets do not enter from the vertical direction, and it is possible to cope with the twisting force, and the overall weight is reduced. The cross-sectional shape of the intermediate portion 2b does not necessarily have to be an open cross-sectional shape opened forward, and may be an open cross-sectional shape opened rearward, upward, or downward.

　中間部材１１は、図４に示すように、一端部１１ａがトーションビーム２の端部に接するように設けられ、トーションビーム２と溶接接合されている。 As shown in FIG. 4, the intermediate member 11 is provided such that one end 11 a is in contact with the end of the torsion beam 2, and is welded to the torsion beam 2.

　つまり、中間部材１１のトーションビーム２側の端部１１ａは、図５に示すように、トーションビーム２の端部２ａの断面形状と同様の、軸直角断面形状が、角部を円弧状に形成された四角形状とされている。このようにすれば、トーションビーム２の左右端部２ａの断面係数が増大し、トーションビーム２と全周的に溶接され、強度的に優れたものとなる。また、中間部材１１とトーションビーム２とは、共に鋼板製であるため、問題なく簡単に溶接接合でき、コスト的にも有利となる。 That is, as shown in FIG. 5, the end 11a on the side of the torsion beam 2 of the intermediate member 11 has an axis-perpendicular cross-sectional shape similar to the cross-sectional shape of the end 2a of the torsion beam 2 with arced corner portions. It has a square shape. In this way, the cross-sectional coefficient of the left and right end portions 2a of the torsion beam 2 is increased, and the torsion beam 2 is welded around the entire circumference, and the strength becomes excellent. Further, since both the intermediate member 11 and the torsion beam 2 are made of steel plates, they can be easily welded without problems, which is also advantageous in cost.

　一方、中間部材１１の他端部１１ｂは、トレーリングアーム１のダイキャスト成形時に一体的に鋳包まれることになる。この鋳包まれる部分を鋳包み部１２と称す。 On the other hand, the other end 11 b of the intermediate member 11 is integrally cast-wrapped when the trailing arm 1 is die-casted. The portion to be cast and wrapped is referred to as a cast-in portion 12.

　特に、本実施形態の中間部材１１は、鋳包み部１２が、中間部材１１の軸線と並行に伸延する直状管部１１ｄと、直状管部１１ｄの一端部に形成された段付き部１１ｅと、を有するように形成されている。このようにすれば、トレーリングアーム１のダイキャスト成形時に中間部材１１の鋳包み部１２を鋳包むと、ダイキャスト部分は段付き部１１ｅと凹凸嵌合した状態になるので、ダイキャスト部分と中間部材１１との連結強度が高まり、あらゆる方向からの捩り力、引張り力、曲げ力あるいは圧縮力に対しても接合強度が高く、中間部材１１がダイキャスト部分から抜け出るおそれはなく、極めて高強度で高剛性なものとなる。しかも、本実施形態の段付き部１１ｅは、放射方向外方に向けて拡がるように形成しているので、より接合強度が高いものとなる。さらに、本実施形態の中間部材１１は、一方の端部に段付き部１１ｅが形成され、他方の端部まで軸線に沿って直状に伸延する筒状体であり、段付き部１１ｅの成形も容易であるため、全体形状がシンプルで、鋳込み作業時のセットも容易となり、製造作業性の点でも製造コスト的にも有利となる。 In particular, in the intermediate member 11 of the present embodiment, the cast-in portion 12 is a straight pipe portion 11d extending in parallel with the axis of the intermediate member 11, and a stepped portion 11e formed at one end of the straight pipe portion 11d. And are formed to have. In this way, when the cast-in portion 12 of the intermediate member 11 is cast-wrapped at the time of die-casting the trailing arm 1, the die-cast portion is in an unevenly fitted state with the stepped portion 11e. The connection strength with the intermediate member 11 is enhanced, and the joint strength is high against torsional force, tensile force, bending force or compression force from all directions, and there is no possibility that the intermediate member 11 may come out of the die cast portion, and extremely high strength Become highly rigid. In addition, since the stepped portion 11 e of the present embodiment is formed to expand outward in the radial direction, the bonding strength is higher. Furthermore, the intermediate member 11 of the present embodiment is a cylindrical body having a stepped portion 11e formed at one end and extending straight along the axis to the other end, and forming the stepped portion 11e Also, the entire shape is simple, and the setting at the time of casting operation becomes easy, which is advantageous also in terms of manufacturing workability and manufacturing cost.

　本実施形態の段付き部１１ｅは、外方に向けて拡がるものであるが、本発明は、これのみでなく、中間部材１１が、ダイキャスト成形部分から抜けないような形状であればどのような形状であってもよく、放射方向内方に向かって変形させてもよく、また、ジグザク状などに変形させることにより形成してもよい。また、端部１１ａは、トーションビーム２に外接状態でなく、内接状態としてもよい。 The stepped portion 11e of the present embodiment is expanded outward, but the present invention is not limited to this, and it is not limited as long as the intermediate member 11 does not come out of the die cast molding portion It may be formed in any shape, may be deformed radially inward, or may be formed by deforming in a zigzag shape or the like. Further, the end portion 11 a may be inscribed with the torsion beam 2 instead of being in a state of being inscribed with the torsion beam 2.

　中間部材１１は、直状管部１１ｄに通孔１３を形成してもよい。通孔１３を直状管部１１ｄに形成すれば、鋳込み成形時に通孔１３を通って湯が流れ、これが固化すると、ダイキャスト部分と中間部材１１とは、通孔１３内で固化したアルミニウム合金によって連結されることになる。この結果、直角断面形状が、角部を円弧状に形成された四角形状あるいは楕円状の中間部材１１に対し曲げ荷重などが作用する場合には、中間部材１１の放射方向外方を被覆する部分（アルミ表皮部分）が中間部材１１に追従して変形することになり、アルミ表皮部分の中間部材１１に対する追従性が向上し、アルミ表皮部分の剥離が防止される。なお、通孔１３は、１つのみでなく、図５に示すように、複数個形成すれば、固化したアルミニウム合金による連結部分が複数になり、剥離の防止効果などが一層高まる。また、通孔１３は、直状管部１１ｄのみでなく、段付き部１１ｅに形成してもよい。 The intermediate member 11 may form the through hole 13 in the straight pipe portion 11 d. If the through hole 13 is formed in the straight pipe portion 11 d, hot water flows through the through hole 13 at the time of cast molding, and when it is solidified, the die cast portion and the intermediate member 11 are aluminum alloy solidified in the through hole 13 Will be linked by As a result, when a bending load or the like acts on the rectangular or elliptical intermediate member 11 whose rectangular cross-sectional shape is formed into an arc shape at the corner portion, a portion covering the radially outer side of the intermediate member 11 (The aluminum skin portion) follows and deforms the intermediate member 11, the followability of the aluminum skin portion to the intermediate member 11 is improved, and the peeling of the aluminum skin portion is prevented. The number of the through holes 13 is not limited to one, and as shown in FIG. 5, if a plurality of through holes 13 are formed, the number of connecting portions by the solidified aluminum alloy becomes plural, and the effect of preventing peeling is further enhanced. Further, the through hole 13 may be formed not only in the straight pipe portion 11 d but also in the stepped portion 11 e.

　次に作用を説明する。 Next, the operation will be described.

　上記構成に係る車両用部品を形成するに当たっては、まず、トレーリングアーム１を鋳造により成形する。この鋳造に当たっては、高真空ダイカスト法などを使用する必要はなく、通常のダイカスト法でよい。高真空ダイカスト法を用いると、鋳造後の製品に含まれるガスが低減し、後に溶接する場合に、溶接不良が低減するというメリットがあるが、本実施形態では、トレーリングアーム１とトーションビーム２とは直接接合しないので、コスト的に不利な高真空ダイカスト法を用いる必要はない。 In forming a vehicle part according to the above configuration, first, the trailing arm 1 is formed by casting. In this casting, it is not necessary to use a high vacuum die casting method etc., and a normal die casting method may be used. If high vacuum die casting is used, the gas contained in the product after casting is reduced, and there is an advantage that welding defects are reduced when welding is performed later, but in the present embodiment, the trailing arm 1 and the torsion beam 2 There is no need to use a cost disadvantaged high vacuum die casting method because

　ダイカスト鋳造を行う場合、型内に中間部材１１の鋳包み部１２をセットし、トレーリングアーム１の成形時に中間部材１１の鋳包み部１２を鋳包む。 When die casting is performed, the cast-in portion 12 of the intermediate member 11 is set in a mold, and the cast-in portion 12 of the intermediate member 11 is cast and wrapped when the trailing arm 1 is formed.

　この鋳包み時に、アルミニウム合金からなる湯は、段付き部１１ｅを有する鋳包み部１２の周囲を包むように流れると共に、中間部材１１に開設された通孔１３を通って流れる。そして、これが固化すると、ダイキャスト部分と中間部材１１とは、通孔１３内で固化したアルミニウム合金によって連結される。この結果、軸直角断面形状が角部を円弧状とした多角形状または楕円形状となっている中間部材１１に対し、引張り方向、つまり中間部材１１がダイキャスト成形部分からぬける方向の力、あるいは回転方向（ねじり方向）などの力が作用しても、ダイキャスト成形部分と段付き部１１ｅとの係合状態や通孔１３内で固化したアルミニウム合金がこれに対抗することになる。これにより、中間部材１１の放射方向外方を被覆する部分（アルミ表皮部分）が中間部材１１に追従して変形することになり、アルミ表皮部分の中間部材１１に対する追従性が向上し、アルミ表皮部分の剥離が防止される。 At the time of casting, the hot water made of an aluminum alloy flows so as to wrap around the casting portion 12 having the stepped portion 11 e and also flows through the through holes 13 opened in the intermediate member 11. Then, when this solidifies, the die cast portion and the intermediate member 11 are connected by the aluminum alloy solidified in the through hole 13. As a result, with respect to the intermediate member 11 in which the axis-perpendicular cross-sectional shape is a polygonal shape or an elliptical shape having arcs at the corners, a force in the tension direction, that is, a direction in which the intermediate member 11 is detached from the die cast molding Even if a force such as a direction (torsion direction) acts, the aluminum alloy solidified in the engagement state of the die cast molding portion and the stepped portion 11 e or in the through hole 13 opposes this. As a result, the portion (aluminum skin portion) covering the radially outer side of the intermediate member 11 follows the intermediate member 11 and deforms, and the followability of the aluminum skin portion to the intermediate member 11 is improved, and the aluminum skin is improved. Peeling of parts is prevented.

　次に、予めプレス成形あるいは液圧成形などにより形成されたトーションビーム２の端部２ａを中間部材１１の端部１１ａに挿入し、溶接により両者を接合する。この中間部材１１は、鋼板製であり、トーションビーム２も鋼板製であるため、両者の接合は問題なく行うことができる。 Next, the end 2a of the torsion beam 2 formed in advance by press forming or liquid pressure forming is inserted into the end 11a of the intermediate member 11, and both are joined by welding. The intermediate member 11 is made of a steel plate, and the torsion beam 2 is also made of a steel plate. Therefore, the two members can be joined without any problem.

　このように、本実施形態では、面倒なアルミニウム合金同士の溶接作業や、異種金属同士の溶接作業を行うことなく、異種金属のトレーリングアーム１とトーションビーム２を簡単に連結することができる。 As described above, in the present embodiment, the trailing arm 1 and the torsion beam 2 of different metals can be easily connected without performing troublesome work of welding aluminum alloys or welding of different metals.

　本発明は、上述した実施形態のみに限定されるものではなく、本発明の技術的思想内において当業者により種々変更が可能である。例えば、上述した実施形態は、車両のトーションビーム式サスペンションについて説明したが、本発明は、これのみに限定されるものではなく、フロントまたはリアサブフレームなど異種金属を使用する種々の車両用部品に同様に実施可能である。 The present invention is not limited to the embodiments described above, and various modifications can be made by those skilled in the art within the technical concept of the present invention. For example, although the embodiments described above have described a torsion beam type suspension for a vehicle, the invention is not limited to this alone, as can be applied to various vehicle components using dissimilar metals such as front or rear subframes Can be implemented.

　本発明は、軽量で変形しにくく、製造が容易でコスト的にも有利な、強度的に信頼性の高い異種金属材料からなるトーションビーム式サスペンションに好適に利用できる。 INDUSTRIAL APPLICABILITY The present invention can be suitably used for a torsion beam type suspension made of a dissimilar metal material which is light in weight, difficult to deform, easy to manufacture, and advantageous in cost, and is highly reliable.

　本出願は、２０１１年７月７日に出願された日本特許出願番号２０１１－１５１２２７号に基づいており、それらの開示内容は、参照され、全体として、組み入れられている。 This application is based on Japanese Patent Application No. 2011-151227 filed on July 7, 2011, the disclosure of which is incorporated by reference in its entirety.

１…トレーリングアーム（第１部品）、
２…トーションビーム（第２部品）、
２ａ…トーションビームの端部、
２ｂ…トーションビームの中間部、
１１…中間部材、
１１ｄ…直状管部、
１１ｅ…段付き部、
１２…鋳包み部。 1 ... trailing arm (first part),
2 ... Torsion beam (second part),
2a ... end of torsion beam,
2b: middle part of torsion beam,
11 ... intermediate member,
11d: Straight tube,
11e ... stepped portion,
12 ... Casting part.

Claims (3)

　アルミダイキャスト製の第１部品と鋼板製の第２部品との間に、鋼板製の繋ぎ用中間部材を設け、当該中間部材の一端部を前記第１部品のダイキャスト成形時に一体的に鋳包み、他端部を前記第２部品と溶接接合してなる車両用部品において、前記中間部材は、前記他端部が筒状をした前記第２部品の端部と内接若しくは外接するように成形され、前記鋳包み側の一端部が前記中間部材の軸線と並行に伸延する直状管部と、当該直状管部の少なくとも端部に形成された段付き部と、を有するように形成したことを特徴とする車両用部品の構造。 A connecting intermediate member made of steel plate is provided between a first component made of aluminum die-cast and a second component made of steel plate, and one end of the intermediate member is integrally cast at the time of die-casting of the first component. In the vehicle component formed by welding and welding the other end to the second part, the intermediate member is inscribed or circumscribed with the end of the second part having the cylindrical end. It is formed so as to have a straight tube portion which is formed and one end portion on the cast-in package side extends parallel to the axis of the intermediate member, and a stepped portion formed at least at the end portion of the straight tube portion. The structure of the parts for vehicles characterized by having been. 　前記中間部材の鋳包み部は、軸直角断面形状が、角部が円弧状とされた多角形状若しくは楕円形状に形成したことを特徴とする請求項１に記載の車両用部品の構造。 The structure of the vehicle component according to claim 1, wherein the cast-in portion of the intermediate member is formed to have an angularly perpendicular cross-sectional shape in a polygonal shape or an elliptical shape in which corner portions are arc-shaped. 　前記車両用部品は、前記第１部品がトレーリングアーム、第２部品がトーションビームとされたトーションビーム式サスペンションである請求項１又は２に記載の車両用部品の構造。 The structure of the vehicle part according to claim 1 or 2, wherein the vehicle part is a torsion beam type suspension in which the first part is a trailing arm and the second part is a torsion beam.
PCT/JP2012/067379 2011-07-07 2012-07-06 Structure of vehicle component Ceased WO2013005846A1 (en)

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