Assembly, steel pipe, and method for manufacturing assembly

Abstract

The present invention increases the joint strength between a closed cross-sectional structural component and a member compared to the prior art. This assembly includes a closed cross-sectional structural component made of a steel pipe material, and a member made of a material different from that of the closed cross-sectional structural component. The closed cross-sectional structural component and the member are engaged with each other. In this way, the joint strength between the closed cross-sectional structure component and the material different from that of the closed cross-sectional structure component, for engaging the closed cross-sectional structure component with the material different from that of the closed cross-sectional structure component, can be increased compared to the prior art which employs plane contact for joining.

Description

Assembly, steel pipe, and method for manufacturing assembly

[0001] The technology of the present disclosure relates to an assembly, a steel pipe, and a method for manufacturing the assembly.

[0002] Japanese Patent Application Laid-Open Publication No. 2009-220141 discloses a pipe product manufacturing apparatus. The pipe product manufacturing apparatus includes a blow molding die consisting of a lower die and an upper die, a pipe support mechanism that horizontally supports a pipe between the lower die and the upper die so that the pipe can be raised and lowered, an electric heating mechanism that applies electricity to heat the pipe supported by the pipe support mechanism, and a gas injection mechanism that injects high-pressure gas into the heated pipe. The pipe is heated to a quenching temperature by electric heating, closed by a blow molding die, and expanded by injecting high-pressure gas into the die, bringing the pipe into contact with the die. Because the pipe is heated to the quenching temperature while the die is at room temperature, the pipe is rapidly cooled by the die and quenched. This produces a pipe product.

[0003] Such pipe products are used by being joined to aluminum cast parts. Specifically, the pipe product and the aluminum cast part are arranged so that they are in flat contact. The pipe product and the aluminum cast part are joined by inserting a bolt from the inside of the pipe product into a nut embedded in the aluminum cast part and fastening them together.

[0004] However, when a certain force is applied to an aluminum casting, this force is transmitted from the aluminum casting to the pipe product that is in flat contact with the aluminum casting via the mechanical fastening part, resulting in weak joint strength. Specifically, stress concentration occurs at the mechanical fastening part, which can cause buckling at the joint.

[0005] The technology disclosed herein has been developed in consideration of the above facts, and aims to provide an assembly, a steel pipe, and a method for manufacturing an assembly that can increase the joining strength between closed cross-section structural parts and members compared to conventional technology.

[0006] An assembly according to a first aspect of the disclosed technology is an assembly comprising a closed cross-section structural component having a first joint and a member having a second joint, wherein the closed cross-section structural component and the member are joined by the first joint and the second joint, and the first joint and the second joint have complementary shapes that complement each other.

[0007] A moving body according to a second aspect includes the closed cross-section structural component according to the first aspect as a frame.

[0008] A third aspect is a method for assembling an assembly comprising a closed cross-section structural component having a first joint and a member having a second joint, the method including joining the first joint of the closed cross-section structural component and the second joint of the member, wherein the first joint and the second joint have complementary shapes that complement each other.

[0009] The fourth aspect of the member is a member that is joined to a closed cross-section structural component having a first joint portion, and has a second joint portion having a shape complementary to the first joint portion, and the closed cross-section structural component and the member are joined by the first joint portion and the second joint portion.

[0010] A fifth aspect is an assembly comprising a closed section structural component made of steel pipe material and a member made of a material different from that of the closed section structural component, wherein the closed section structural component and the member are fitted together.

[0011] A sixth aspect is a steel pipe made of a steel pipe material, which is capable of being fitted with a member made of a material different from that of the steel pipe.

[0012] In the seventh aspect of the method for manufacturing an assembly, an assembly is manufactured by fitting a closed cross-section structural component made of a steel pipe material with a member made of a material different from that of the closed cross-section structural component.

[0013] The technology of the present disclosure has been developed in consideration of the above facts, and can increase the joining strength between closed cross-section structural components and members compared to conventional technology.

[0014] 13A and 13B are cross-sectional views of examples of closed section structural components and assemblies according to the first embodiment. FIG. 13B is a cross-sectional view of an example of an assembly according to the second embodiment. FIG. 13C is a cross-sectional view of an example of an assembly according to the third embodiment. FIG. 13D is a cross-sectional view of an example of an assembly according to the fourth embodiment. FIG. 13E is a cross-sectional view of an example of a closed section structural component and assemblies according to the fifth embodiment. FIG. 13F is a cross-sectional view of an example of an assembly according to the sixth embodiment. FIG. 13G is a cross-sectional view of an example of an assembly according to the seventh embodiment. FIG. 13H is a cross-sectional view of an example of an assembly according to the eighth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the ninth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the tenth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the eleventh embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the twelfth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the thirteenth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the fourteenth embodiment. FIG. 13I is a cross-sectional view of an example of an aluminum casting part of the assembly according to the fifteenth embodiment. FIG. 13I is a cross-sectional view of an example of an assembly according to the fifteenth embodiment. FIG. 20 is an exploded cross-sectional view of an example of an assembly of the sixteenth embodiment.

[0015] Hereinafter, embodiments of the technology of the present disclosure will be described with reference to the drawings.

[0016] 1 is a cross-sectional view of an example of a closed cross section structural component 12 and an assembly 10A0 according to a first embodiment. The assembly 10A0 includes a closed cross section structural component 12 having a first joint portion 12B123 and an aluminum cast member 14 having a second joint portion 14B123. The closed cross section structural component 12 and the aluminum cast member 14 are joined together by the first joint portion 12B123 and the second joint portion 14B123.

[0017] The closed cross-section structural component 12 is composed of multiple, for example, two, structural components 12A and 12B. Each of the two structural components 12A and 12B is manufactured by bending a single flat plate so that multiple, for example, three, surfaces are formed. Flanges 12FA1 and 12FA2 are formed at both ends of the structural component 12A. Flanges 12FB1 and 12FB2 are formed at both ends of the structural component 12B. The flanges 12FA1 and 12FB1 are spot-welded to the flanges 12FA2 and 12FB2, respectively, to form a first overlap flange portion 12F1 and a second overlap flange portion 12F2. In this manner, the closed cross-section structural component 12 is manufactured.

[0018] The closed cross-section structural component 12 is a component that extends in a direction perpendicular to the plane of the paper in Fig. 1. The cross-section of the closed cross-section structural component 12 is hollow and polygonal. For example, the cross-section of the closed cross-section structural component 12 is hexagonal. However, the cross-section is not limited to a hexagon, and may be a rectangle or a pentagon. Furthermore, the cross-section may have a curve.

[0019] The cast aluminum member 14 is manufactured by melting aluminum by heating it to a temperature equal to or higher than its melting point, pouring the molten aluminum into a mold made of sand or the like so as to form the second bonding portion 14B123, and then cooling the mold. The cast aluminum member 14 is a part that extends in a direction perpendicular to the plane of the paper in FIG. 1 .

[0020] The first joint portion 12B123 of the closed cross section structural component 12 and the second joint portion 14B123 of the aluminum cast member 14 have complementary shapes. The first joint portion 12B123 has a protruding shape, and the second joint portion 14B123 has a recessed shape on the surface 14A facing the closed cross section structural component 12. The first joint portion 12B123 is embedded in the second joint portion 14B123. Specifically, at least one-third of the perimeter of the cross section of the first joint portion 12B123 is embedded in the second joint portion 14B123.

[0021] The first joint portion 12B123 of the closed cross-section structural component 12 includes a first surface 12B1, and second and third surfaces 12B2 and 12B3 that intersect with the first surface 12B1. The first surface 12B1, the second surface 12B2, and the third surface 12B3 are outer surfaces of the first joint portion 12B123. The angles formed by the first surface 12B1 and the second and third surfaces 12B2 and 12B3 that intersect with the first surface 12B1 are obtuse angles.

[0022] The second joint portion 14B123 of the aluminum cast member 14 includes a first surface 14B1 and second and third surfaces 14B2 and 14B3 that intersect with the first surface 14B1. The first surface 14B1, the second surface 14B2, and the third surface 14B3 are inner surfaces of the second joint portion 14B123. The angles formed by the first surface 14B1 and the second and third surfaces 12B2 and 12B3 that intersect with the first surface 14B1 are obtuse angles.

[0023] The angle between the first surface 12B1 and the second surface 12B2 is equal to the angle between the first surface 14B1 and the second surface 14B2. The angle between the first surface 12B1 and the third surface 12B3 is equal to the angle between the first surface 14B1 and the third surface 14B3. The first surface 12B1 of the first bonding portion 12B123 is bonded to the first surface 14B1 of the second bonding portion 14B123, the second surface 12B2 is bonded to the second surface 14B2, and the third surface 12B3 is bonded to the third surface 14B3.

[0024] The assembly 10A0 further includes a reinforcing member 16 that reinforces the joint between the closed cross-section structural component 12 and the aluminum cast member 14. The reinforcing member 16 is a steel plate joined to the closed cross-section structural component 12 or the aluminum cast member 14 so as to cover the portion of the closed cross-section structural component 12 that is not embedded in the aluminum cast member 14. The reinforcing member 16 is formed by bending the steel plate so as to cover the portion that is not embedded in the aluminum cast member 14.

[0025] (Method of Manufacturing Assembly) Next, a method of manufacturing the assembly 10A0 will be described. There are a first method and a second method of manufacturing the assembly 10A0.

[0026] The first method will be described.

[0027] As described above, the closed cross section structural component 12 and the aluminum cast member 14 are manufactured. Either the closed cross section structural component 12 or the aluminum cast member 14 may be manufactured first, or both may be manufactured simultaneously.

[0028] The closed cross section structural component 12 and the aluminum cast member 14 are arranged so that the first joint portion 12B123 is embedded in the second joint portion 14B123. Specifically, the closed cross section structural component 12 and the aluminum cast member 14 are arranged so that the first surface 12B1 of the first joint portion 12B123 and the first surface 14B1 of the second joint portion 14B123 are in contact, the second surface 12B2 and the second surface 14B2 are in contact, and the third surface 12B3 and the third surface 14B3 are in contact. The arrangement of the closed cross section structural component 12 and the aluminum cast member 14 is performed by moving one of the closed cross section structural component 12 and the aluminum cast member 14 closer to the other, or by moving the closed cross section structural component 12 and the aluminum cast member 14 closer to each other.

[0029] The first joint portion 12B123 of the closed cross section structural component 12 and the second joint portion 14B123 of the aluminum cast member 14 are joined together. Specifically, the first surfaces 12B1 and 14B1, the second surfaces 12B2 and 14B2, and the third surfaces 12B3 and 14B3 are joined together by mechanical fastening, welding, adhesive, or other joining method. Mechanical fastening, as described above, involves joining the first joint portion 12B123 of the closed cross section structural component 12 and the second joint portion 14B123 of the aluminum cast member 14, for example, using bolts and nuts. Welding can be performed by, for example, spot welding, arc (plasma) welding, or laser welding. Other joining methods include, for example, spot welding or continuous welding using friction stir welding.

[0030] The reinforcing member 16 is joined to the closed cross-section structural component 12 or the aluminum cast member 14 so as to cover the portion of the closed cross-section structural component 12 that is not embedded in the aluminum cast member 14. The joining is performed by mechanical fastening, welding, adhesive, or other joining methods as described above.

[0031] The second method will now be described. The second method is substantially the same as the first method, so only the differences will be described.

[0032] The structural component 12B and the cast aluminum member 14 are arranged so that the first surface 12B1 of the first joint portion 12B123 contacts the first surface 14B1 of the second joint portion 14B123, the second surface 12B2 contacts the second surface 14B2, and the third surface 12B3 contacts the third surface 14B3. The structural component 12B and the cast aluminum member 14 are arranged by moving either the structural component 12B or the cast aluminum member 14 closer to the other, or by moving the structural component 12B and the cast aluminum member 14 closer to each other.

[0033] The first joint portion 12B123 and the second joint portion 14B123 are joined together by mechanical fastening, welding, adhesive, or other joining methods as described above.

[0034] Either the structural component 12A or the structural component 12B to which the aluminum cast member 14 is joined is moved closer to the other, or the structural component 12A and the structural component 12B to which the aluminum cast member 14 is joined are moved closer to each other. The flanges 12FA1 and 12FB1, and the flanges 12FA2 and 12FB2 are spot-welded, for example, to form the first overlap flange portion 12F1 and the second overlap flange portion 12F2. At this stage, the closed cross-section structural component 12 is manufactured.

[0035] The reinforcing member 16 is positioned as described above.

[0036] (Mobile Body) The assembly 10A0 is provided in a mobile body, for example, a vehicle. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0037] More specifically, for example, aluminum cast members 14 are provided on each side of the front left and right wheels and on each side of the rear left and right wheels. A closed cross-section structural component 12 is joined to each of the aluminum cast members 14 provided on the front left wheel side and the rear left wheel side, and a closed cross-section structural component 12 is joined to each of the aluminum cast members 14 provided on the front right wheel side and the rear right wheel side.

[0038] An assembly 10A0 is manufactured on each side of the left and right front wheels and on each side of the left and right rear wheels. A reinforcing member 16 is disposed on each assembly 10A0 as described above.

[0039] In this way, this embodiment also provides a method for manufacturing a moving body.

[0040] (Effects) In the prior art, the closed cross section structural component and the cast aluminum member are joined by planar contact. However, in this embodiment, the first and second joining portions for joining the closed cross section structural component and the cast aluminum member have complementary shapes, so that the joining strength between the closed cross section structural component and the cast aluminum member can be made stronger than in the prior art.

[0041] In this embodiment, when a certain force acts on the aluminum cast part, the force is transmitted from the aluminum cast part to the closed cross-section structural part joined to the aluminum cast part. In this case, since the first joint portion and the second joint portion have complementary shapes as described above, the force acting on the aluminum cast part is easily transmitted from the aluminum cast part to the closed cross-section structural part. Therefore, this embodiment can prevent buckling due to stress concentration at the first joint portion and the second joint portion.

[0042] In this embodiment, since the first joint is embedded in the second joint, buckling due to stress concentration can be suppressed in the portion of the first joint that is embedded in the second joint.

[0043] The first joint portion of the closed cross-section structural component and the second joint portion of the aluminum cast member have complementary shapes. The first joint portion has a protruding shape, and the second joint portion has a recessed shape, and the first joint portion is embedded in the second joint portion. Therefore, this embodiment can improve the positioning accuracy of the closed cross-section structural component in the lateral direction (the direction perpendicular to the longitudinal direction (the up-down direction on the paper surface of Figure 1)) compared to the prior art.

[0044] Second Embodiment (Configuration) Next, the configuration of an assembly 10B0 according to a second embodiment will be described. The configuration of the assembly 10B0 according to the second embodiment is substantially the same as the configuration of the assembly 10A0 according to the first embodiment, and therefore only differences will be described.

[0045] FIG. 2 is a cross-sectional view of an example of an assembly 10B0 according to the second embodiment.

[0046] The assembly 10B0 includes the following closed cross-section structural component 12STAF instead of the closed cross-section structural component 12 of the first embodiment.

[0047] The closed cross-section structural component 12STAF is a closed cross-section member in which two flanges 12F11 and 12F22 and a first joint portion 12B123 are integrally formed from a single pipe material.

[0048] The closed cross-section structural component 12STAF is manufactured, for example, as follows: A hollow pipe material is heated to the quenching temperature by electrical heating, closed in a blow molding die manufactured to form the two flanges 12F11, 12F22 and the first joint 12B123, and inflated by blowing high-pressure gas into the pipe material until it comes into contact with the blow molding die. Because the pipe material is heated to the quenching temperature while the blow molding die, which is cooled by a water circulation mechanism, is at room temperature, the pipe material is rapidly cooled in the die and quenched. This produces the closed cross-section structural component 12STAF. While the example of electrically heating the pipe material has been given, furnace heating in a furnace is also acceptable.

[0049] (Method for manufacturing assembly) The method for manufacturing the assembly 10B0 of the second embodiment is substantially the same as the first method for the assembly 10A0 of the first embodiment, except that a closed cross-section structural part 12STAF is used instead of the closed cross-section structural part 12 of the first embodiment.

[0050] (Mobile Body) The assembly 10B0 is provided in a mobile body, for example, a vehicle, as in the first embodiment. Specifically, the closed cross-section structural component 12STAF is provided as a frame for a vehicle compartment for passengers.

[0051] In this way, the second embodiment also provides a method for manufacturing a moving body, as in the first embodiment.

[0052] (Effects) The assembly of the second embodiment has the same effects as the assembly of the first embodiment.

[0053] The assembly of the second embodiment uses a closed cross-section structural component 12STAF.

[0054] Therefore, the plate thickness of the closed cross section structural component 12STAF can be reduced compared to the closed cross section structural component 12 of the first embodiment, thereby making it possible to reduce the weight.

[0055] Since the closed cross-section structural component 12STAF is used, the cross-section of the pipe material can be changed in the longitudinal direction and the cross-sectional shape can be made complex, thereby improving the cross-sectional performance within a limited layout and improving the strength and rigidity of the closed cross-section structural component 12STAF.

[0056] Although the closed cross-section structural component 12STAF has a pipe structure, it can be molded into a closed cross-section with an integrated flange. This makes it easy to join the closed cross-section structural component 12STAF to other components. This makes it possible to integrate assemblies made up of multiple components, reducing the number of molds and manufacturing processes.

[0057] By employing electrical heating to heat the pipe material to manufacture the closed cross-section structural component 12STAF, it is possible to make the equipment more compact than in the first embodiment, and the investment cost for the equipment can be reduced more than in the first embodiment.

[0058] [Third embodiment] (Configuration) Next, the configuration of the assembly 10A1 of the third embodiment will be described. The configuration of the assembly 10A1 of the third embodiment is substantially the same as the configuration of the assembly 10A0 of the first embodiment, so only the differences will be described.

[0059] FIG. 3 is a cross-sectional view of an example of an assembly 10A1 according to the third embodiment.

[0060] Flange portion accommodating portions 14C1 and 14C2 for accommodating the first overlap flange portion 12F1 and the second overlap flange portion 12F2 are formed on a surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12. The flange portion accommodating portions 14C1 and 14C2 are recessed portions recessed in the surface 14A.

[0061] One of the first surface 12B1 and the first surface 14B1 has a plurality of protrusions formed at predetermined intervals in the longitudinal direction, and the other of the first surface 12B1 and the first surface 14B1 has a plurality of openings into which the respective protrusions are inserted. In this embodiment, the first surface 14B1 has protrusions 14T, and openings 12K into which the protrusions 14T are inserted are formed in the first surface 12B1.

[0062] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10A1 is substantially the same as the methods of manufacturing the assembly 10A0 of the first embodiment (first and second methods), so only the differences will be described.

[0063] In this embodiment, the mold for producing the aluminum cast member 14 is configured so that flange portion accommodating portions 14C1 and 14C2 are formed on the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12, and that a protrusion 14T is formed on the first surface 14B1 of the second bonding portion 14B123. The aluminum cast member 14 is produced using this mold.

[0064] An opening 12K is formed in the first surface 12B1 of the first joining portion 12B123 of the closed cross-section structural component 12, into which the protrusion 14T is inserted.

[0065] In the first method, the closed cross-section structural component 12 and the aluminum cast member 14 are positioned so that the protrusion 14T is inserted into the opening 12K. In the second method, the structural component 12B and the aluminum cast member 14 are positioned so that the protrusion 14T is inserted into the opening 12K.

[0066] The first overlapping flange portion 12F1 and the second overlapping flange portion 12F2 are accommodated in the flange portion accommodating portions 14C1 and 14C2.

[0067] (Mobile Body) The assembly 10A1 is provided in a mobile body, for example, a vehicle. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0068] In this way, the third embodiment also provides a method for manufacturing a moving body, as in the first embodiment.

[0069] (Effects) This embodiment has the same effects as the first embodiment.

[0070] In the third embodiment, the projection 14T is inserted into the opening 12K, so that the positioning accuracy of the closed cross-section structural component 12 in the longitudinal direction can be improved compared to the first embodiment.

[0071] [Fourth embodiment] (Configuration) Next, the configuration of the assembly 10B1 of the fourth embodiment will be described. The configuration of the assembly 10B1 of the fourth embodiment is substantially the same as the configuration of the assembly 10B0 of the second embodiment, so only the differences will be described.

[0072] FIG. 4 is a cross-sectional view of an example of an assembly 10B1 according to the fourth embodiment.

[0073] In the fourth embodiment, as in the third embodiment, flange accommodating portions 14C1 and 14C2 for accommodating flanges 12F11 and 12F22 are formed on the surface 14A of the aluminum casting member 14 facing the closed cross-section structural component 12.

[0074] One of the first surface 12B1 and the first surface 14B1 has a plurality of protrusions formed at predetermined intervals in the longitudinal direction, and the other of the first surface 12B1 and the first surface 14B1 has a plurality of openings into which the respective protrusions are inserted. In this embodiment, as in the third embodiment, the first surface 14B1 has protrusions 14T, and the first surface 12B1 has openings 12K into which the protrusions 14T are inserted.

[0075] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B1 of the fourth embodiment is substantially the same as the method of manufacturing the assembly 10B0 of the second embodiment. In this embodiment, as in the third embodiment, the mold for manufacturing the aluminum cast member 14 is configured so that flange portion accommodating portions 14C1 and 14C2 are formed on the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12, and the convex portion 14T is formed on the first surface 14B1 of the second joint portion 14B123. The aluminum cast member 14 is manufactured using this mold.

[0076] An opening 12K for inserting the protrusion 14T is formed in the first surface 12B1 of the first joining portion 12B123 of the closed cross-section structural component 12STAF.

[0077] The closed cross section structural component 12STAF and the aluminum cast member 14 are arranged so that the flanges 12F11, 12F22 are accommodated in the flange portion accommodating portions 14C1, 14C2 and the protrusion 14T is inserted into the opening 12K. (Mobile Body) As in the second embodiment, the assembly 10B1 is provided in a mobile body, for example, a vehicle. Specifically, the closed cross section structural component 12STAF is provided as a frame for a vehicle interior for passengers.

[0078] In this way, the fourth embodiment also provides a method for manufacturing a moving body, as in the second embodiment.

[0079] (Effects) This embodiment has the same effects as the second embodiment.

[0080] In the fourth embodiment, the projection 14T is inserted into the opening 12K, so that the positioning accuracy of the closed cross-section structural component 12 in the longitudinal direction can be improved compared to the second embodiment.

[0081] [Fifth embodiment] (Configuration) Next, the configuration of the assembly 10B2 of the fifth embodiment will be described. The configuration of the assembly 10B2 of the fifth embodiment is substantially the same as the configuration of the assembly 10B1 of the fourth embodiment, so only the differences will be described.

[0082] FIG. 5 is a cross-sectional view of an example of a closed cross-section structural component 12STAF and an assembly 10B2 according to the fifth embodiment.

[0083] The closed cross-section structural component 12STAF of the fifth embodiment is formed with one flange 12F3.

[0084] A flange accommodating portion 14C3 for accommodating the flange 12F3 is formed on the first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14.

[0085] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B2 of the fifth embodiment is substantially the same as the method of manufacturing the assembly 10B1 of the fourth embodiment. In this embodiment, the mold for manufacturing the aluminum cast member 14 is configured so that the flange portion accommodating portion 14C3 is formed on the first surface 14B1 of the second joint portion 14B123. The aluminum cast member 14 is manufactured using this mold.

[0086] The closed cross-section structural component 12STAF and the aluminum cast member 14 are arranged so that the flange 12F3 of the closed cross-section structural component 12STAF is accommodated in the flange portion accommodating portion 14C32 on the first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14.

[0087] (Mobile Body) The assembly 10B2 is provided in a mobile body, for example, a vehicle, as in the fourth embodiment. Specifically, the closed cross-section structural component 12STAF is provided as a frame for a vehicle compartment for passengers.

[0088] In this way, the fifth embodiment also provides a method for manufacturing a moving body, as in the fourth embodiment.

[0089] (Effects) This embodiment has the same effects as the second embodiment.

[0090] In the fifth embodiment, the closed cross section structural component 12STAF and the aluminum cast member 14 are arranged so that the flange 12F3 of the closed cross section structural component 12STAF is accommodated in the flange portion accommodating portion 14C3 on the first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14. This makes it possible to improve the positioning accuracy of the closed cross section structural component 12STAF in the lateral direction (direction perpendicular to the longitudinal direction (up and down on the paper surface of FIG. 5 )) compared to the prior art.

[0091] [Sixth embodiment] (Configuration) Next, the configuration of the assembly 10A2 of the sixth embodiment will be described. The configuration of the assembly 10A2 of the sixth embodiment is substantially the same as the configuration of the assembly 10A0 of the first embodiment, so only the differences will be described.

[0092] FIG. 6 is a cross-sectional view of an example of an assembly according to the sixth embodiment.

[0093] In the first embodiment, the distance between the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12 and the first overlap flange portion 12F1 and the second overlap flange portion 12F2 is zero.

[0094] In contrast, in the sixth embodiment, the distances L1 and L2, which are greater than 0, between the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12 and the first overlap flange portion 12F1 and the second overlap flange portion 12F2, respectively.

[0095] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10A2 of the sixth embodiment is substantially the same as the method of manufacturing the assembly 10A0 of the first embodiment. The closed cross section structural component 12 and the cast aluminum component 14 are arranged so that the distances between the surface 14A of the cast aluminum component 14 facing the closed cross section structural component 12 and the first and second overlap flange portions 12F1 and 12F2 are L1 and L2, respectively. This allows components such as harnesses to be inserted between the surface 14A of the cast aluminum component 14 facing the closed cross section structural component 12 and the first and second overlap flange portions 12F1 and 12F2, thereby increasing the degree of freedom in handling the components.

[0096] In the manufacturing method of the assembly 10A2 of the sixth embodiment, the reinforcing member 16 is not arranged as in the first embodiment, but the reinforcing member 16 may be arranged as in the first embodiment.

[0097] (Mobile Body) The assembly 10A2 is provided in a mobile body, for example, a vehicle, as in the first embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0098] In this way, the sixth embodiment also provides a method for manufacturing a moving body, as in the first embodiment.

[0099] (Effects) This embodiment has the same effects as the first embodiment.

[0100] [Seventh embodiment] (Configuration) Next, the configuration of the assembly 10B3 of the seventh embodiment will be described. The configuration of the assembly 10B3 of the seventh embodiment is substantially the same as the configuration of the assembly 10A2 of the sixth embodiment, so only the differences will be described.

[0101] FIG. 7 is a cross-sectional view of an example of an assembly 10B3 according to the seventh embodiment.

[0102] The assembly 10B3 of the seventh embodiment differs from the assembly 10A2 of the sixth embodiment in that it includes the closed cross-section structural component 12STAF of the second embodiment instead of the closed cross-section structural component 12 of the assembly 10A2 of the sixth embodiment.

[0103] In the seventh embodiment, the distances between the surface 14A of the aluminum cast member 14 facing the closed cross section structural component 12 and the flanges 12F11, F22 are L1, L2, respectively, which are greater than 0. This allows components such as harnesses to be inserted between the surface 14A of the aluminum cast member 14 facing the closed cross section structural component 12 and the flanges 12F11, F22, thereby increasing the degree of freedom in handling the components.

[0104] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B3 of the seventh embodiment is substantially the same as the method of manufacturing the assembly 10A20 of the sixth embodiment. Instead of the closed cross section structural component 12 of the assembly 10A2 of the sixth embodiment, the closed cross section structural component 12STAF of the second embodiment is used.

[0105] In the manufacturing method of the assembly 10B3 of the seventh embodiment, the reinforcing member 16 is not arranged as in the first embodiment, but the reinforcing member 16 may be arranged as in the first embodiment.

[0106] (Mobile Body) The assembly 10B3 is provided in a mobile body, for example, a vehicle, as in the sixth embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0107] In this way, the seventh embodiment also provides a method for manufacturing a moving body, as in the sixth embodiment.

[0108] (Effects) This embodiment has the same effects as the sixth embodiment.

[0109] Eighth Embodiment (Configuration) Next, the configuration of the assembly 10A3 of the eighth embodiment will be described. The configuration of the assembly 10A3 of the eighth embodiment is substantially the same as the configuration of the assembly 10A2 of the sixth embodiment, so only the differences will be described.

[0110] FIG. 8A is a cross-sectional view of an example of an assembly 10A3 according to the eighth embodiment.

[0111] The first surface 12B1 of the first joint portion 12B123 of the closed cross-section structural component 12 of the assembly 10A3 of the eighth embodiment is provided with a convex portion 12T. The first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14 is formed with a concave portion 14C4 into which the convex portion 12T is inserted.

[0112] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10A3 of the eighth embodiment is substantially the same as the method of manufacturing the assembly 10A20 of the sixth embodiment, so only the differences will be described.

[0113] The mold for the aluminum cast member 14 is configured so that the recess 14C4 is formed in the first surface 14B1 of the aluminum cast member 14. The aluminum cast member 14 is manufactured using the mold.

[0114] The closed cross-section structural component 12 is manufactured so that a protrusion 12T is provided on the first surface 12B1.

[0115] The structural component 12B and the aluminum cast member 14 are positioned so that the convex portion 12T provided on the first surface 12B1 of the first joint portion 12B123 of the closed cross-section structural component 12 is inserted into the concave portion 14C4 formed on the first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14.

[0116] (Mobile Body) The assembly 10A3 is provided in a mobile body, for example, a vehicle, as in the sixth embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0117] In this way, the eighth embodiment also provides a method for manufacturing a moving body, as in the sixth embodiment.

[0118] (Effects) This embodiment has the same effects as the sixth embodiment.

[0119] In the eighth embodiment, the structural component 12B and the aluminum cast member 14 are arranged so that the convex portion 12T provided on the first surface 12B1 of the first joint portion 12B123 of the closed cross section structural component 12 is inserted into the concave portion 14C4 formed on the first surface 14B1 of the second joint portion 14B123 of the aluminum cast member 14. Therefore, the positioning accuracy of the closed cross section structural component 12 in the lateral direction (direction perpendicular to the longitudinal direction (up and down on the paper surface of FIG. 5)) can be improved compared to the sixth embodiment.

[0120] [Ninth embodiment] (Configuration) Next, the configuration of the assembly 10A4 of the ninth embodiment will be described. The configuration of the assembly 10A5 of the ninth embodiment is substantially the same as the configuration of the assembly 10A4 of the eighth embodiment, so only the differences will be described.

[0121] FIG. 8B is a cross-sectional view of an example of an assembly 10A4 according to the ninth embodiment.

[0122] The first surface 12B1 of the closed cross section structural component 12 of the assembly 10A4 of the ninth embodiment is provided with a protrusion 12T. A recess 14C4 into which the protrusion 12T is inserted is formed in the surface 14A of the aluminum casting member 14 facing the closed cross section structural component 12.

[0123] The convex portion 12T and the concave portion 14C4 have complementary shapes, and the convex portion 12T is embedded in the concave portion 14C4.

[0124] The protrusion 12T is an example of a "first bonding portion" of the technology of the present disclosure. The recess 14C4 is an example of a "second bonding portion" of the technology of the present disclosure.

[0125] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10A4 of the ninth embodiment is substantially the same as the method of manufacturing the assembly 10A4 of the eighth embodiment, so only the differences will be described.

[0126] The mold for the aluminum cast member 14 is configured so that a recess 14C4 is formed in the surface 14A of the aluminum cast member 14 that faces the closed cross-section structural component 12. The aluminum cast member 14 is manufactured using this mold.

[0127] The closed cross-section structural component 12 and the aluminum cast member 14 are positioned so that the convex portion 12T provided on the first surface 12B1 of the closed cross-section structural component 12 is inserted into the concave portion 14C4 formed on the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12.

[0128] (Mobile Body) The assembly 10A4 is provided in a mobile body, for example, a vehicle, as in the eighth embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0129] In this way, the ninth embodiment also provides a method for manufacturing a moving body, as in the eighth embodiment.

[0130] (Effects) This embodiment has the same effects as the eighth embodiment.

[0131] [Tenth embodiment] Next, the configuration of an assembly 10B4 according to a tenth embodiment will be described. The configuration of the assembly 10B4 according to the tenth embodiment is substantially the same as the configuration of the assembly 10B3 according to the seventh embodiment, and therefore only the differences will be described.

[0132] FIG. 9A is a cross-sectional view of an example of an assembly 10B4 according to the tenth embodiment.

[0133] In the tenth embodiment, a first surface 12B1 of a closed cross-section structural component 12 of an assembly 10B4 is provided with a recess 12C. A first surface 14B1 of an aluminum cast member 14 is provided with a protrusion 14T that is inserted into the recess 12C.

[0134] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B4 of the tenth embodiment is substantially the same as the method of manufacturing the assembly 10B3 of the seventh embodiment, so only the differences will be described.

[0135] The mold for the cast aluminum member 14 is configured so that the protrusion 14T is formed on the first surface 14B1 of the cast aluminum member 14. The cast aluminum member 14 is manufactured using the mold.

[0136] The closed cross-section structural component 12 is manufactured so that the first surface 12B1 is provided with a recess 12C.

[0137] The closed cross-section structural component 12 and the aluminum cast member 14 are positioned so that the recess 12C provided on the first surface 12B1 of the closed cross-section structural component 12 is inserted into the protrusion 14T formed on the first surface 14B1 of the aluminum cast member 14.

[0138] (Mobile Body) The assembly 10A5 is provided in a mobile body, for example, a vehicle, as in the seventh embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0139] In this way, the tenth embodiment also provides a method for manufacturing a moving body, as in the seventh embodiment.

[0140] (Effects) This embodiment has the same effects as the seventh embodiment.

[0141] Eleventh Embodiment (Configuration) Next, the configuration of an assembly 10B5 of the eleventh embodiment is substantially the same as the configuration of the assembly 10B4 of the tenth embodiment, so differences will be described.

[0142] FIG. 9B is a cross-sectional view of an example of an assembly 10B5 according to the eleventh embodiment.

[0143] A surface 14A of the aluminum casting member 14 facing the closed cross-section structural component 12 is formed with a protrusion 14T to be inserted into the recess 12C.

[0144] The convex portion 14T and the concave portion 12C have complementary shapes, and the convex portion 14T is embedded in the concave portion 12C.

[0145] The recess 12C is an example of a "first bonding portion" of the technology of the present disclosure. The protrusion 14T is an example of a "second bonding portion" of the technology of the present disclosure.

[0146] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B5 of the eleventh embodiment is substantially the same as the method of manufacturing the assembly 10B4 of the tenth embodiment, so only the differences will be described.

[0147] The mold for the aluminum cast member 14 is configured so that a protrusion 14T is formed on a surface 14A of the aluminum cast member 14 that faces the closed cross-section structural component 12. The aluminum cast member 14 is manufactured using this mold.

[0148] The closed cross-section structural component 12 and the aluminum cast member 14 are positioned so that the recess 12C provided on the first surface 12B1 of the closed cross-section structural component 12 is inserted into the protrusion 14T formed on the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12.

[0149] (Mobile Body) The assembly 10B5 is provided in a mobile body, for example, a vehicle, as in the tenth embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0150] In this way, the eleventh embodiment also provides a method for manufacturing a moving body, as in the tenth embodiment.

[0151] (Effects) This embodiment has the same effects as the tenth embodiment.

[0152] [Twelfth Embodiment] (Configuration) The configuration of an assembly 10B6 of the twelfth embodiment is substantially the same as the configuration of the assembly 10B1 of the fourth embodiment, so only the differences will be described.

[0153] FIG. 10A is a cross-sectional view of an example of an assembly 10B6 according to the twelfth embodiment.

[0154] The first surface 14B1 of the second joint portion 14B123 does not have the convex portion 14T formed thereon, and the first surface 12B1 of the first joint portion 12B123 does not have the opening 12K for inserting the convex portion 14T therein.

[0155] The first surface 12B1 of the closed cross-section structural component 12STAF of the assembly 10B6 of the twelfth embodiment is perpendicular to the second surface 12B2 and the third surface 12B3 intersecting with the first surface 12B1.

[0156] The first surface 14B1 of the aluminum cast member 14 is perpendicular to the second surface 12B2 and the third surface 12B3 that intersect with the first surface 14B1.

[0157] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B6 of the twelfth embodiment is substantially the same as the method of manufacturing the assembly 10B1 of the fourth embodiment, so only the differences will be described.

[0158] In the assembly 10B6 of the 12th embodiment, no convex portion 14T is formed on the first surface 14B1 of the second joint 14B123, and no opening 12K for inserting the convex portion 14T is formed on the first surface 12B1 of the first joint 12B123.

[0159] The closed cross-section structural component 12STAF is manufactured so that the angles formed by the first surface 12B1 and the second surface 12B2 and third surface 12B3 intersecting with the first surface 12B1 are right angles.

[0160] The mold for the aluminum cast member 14 is configured so that the first surface 14B1 forms right angles with the second surface 12B2 and the third surface 12B3 that intersect with the first surface 14B1. The aluminum cast member 14 is manufactured using this mold.

[0161] (Mobile Body) The assembly 10B6 is provided in a mobile body, for example, a vehicle, as in the fourth embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0162] In this way, the twelfth embodiment also provides a method for manufacturing a moving body, as in the fourth embodiment.

[0163] (Effects) This embodiment has the same effects as the fourth embodiment.

[0164] [Thirteenth Embodiment] (Configuration) The configuration of an assembly 10B7 of the thirteenth embodiment is substantially the same as the configuration of the assembly 10B0 of the second embodiment, so only the differences will be described.

[0165] FIG. 10B is a cross-sectional view of an example of an assembly 10B7 according to the thirteenth embodiment.

[0166] The first joint portion 12B123 of the closed cross-section structural component 12 of the assembly 10B0 of the second embodiment has a protruding shape including a first surface 12B1, a second surface 12B2, and a third surface 12B3, and the second joint portion 14B123 of the aluminum casting component 14 has a recessed shape including a first surface 14B1, a second surface 14B2, and a third surface 14B3.

[0167] In contrast, in the assembly 10B7 of this embodiment, the closed cross-section structural component 12 has a curved surface 12CC recessed inside the closed cross-section structural component 12, and the aluminum casting component 14 has a curved surface 14PPP protruding outward (i.e., toward the closed cross-section structural component 12).

[0168] The curved surface 12CC and the curved surface 14PPP have complementary shapes. The protrusion 12T is embedded in the recess 14C4.

[0169] The curved surface 12CC is an example of a "first joint" of the technology of the present disclosure. The curved surface 14PPP is an example of a "second joint" of the technology of the present disclosure.

[0170] In addition, as in the fourth embodiment, flange portion accommodating portions 14C1 and 14C2 are formed on the surface 14A of the aluminum casting member 14 facing the closed cross-section structural component 12, to accommodate the first overlapping flange portion 12F1 and the second overlapping flange portion 12F2.

[0171] (Method of Manufacturing Assembly) The method of manufacturing the assembly 10B7 of the thirteenth embodiment is substantially the same as the method of manufacturing the assembly 10B0 of the second embodiment, so only the differences will be described.

[0172] In the assembly 10B7 of the thirteenth embodiment, the mold for producing the aluminum cast member 14 is formed with the curved surface 14PPP, and is configured, as in the third embodiment, so that flange portion accommodating portions 14C1 and 14C2 are formed on the surface 14A of the aluminum cast member 14 facing the closed cross-section structural component 12. The aluminum cast member 14 is produced using this mold.

[0173] The closed cross-section structural component 12STAF is formed so that a curved surface 12CC is formed.

[0174] (Mobile Body) The assembly 10B7 is provided in a mobile body, for example, a vehicle, as in the second embodiment. Specifically, the closed cross-section structural component 12 is provided as a frame for a vehicle compartment for passengers.

[0175] In this way, the thirteenth embodiment also provides a method for manufacturing a moving body, as in the second embodiment.

[0176] (Effects) This embodiment has the same effects as the second embodiment.

[0177] 11 is a cross-sectional view of an example of an assembly 100A0 according to a fourteenth embodiment. The assembly 100A0 includes a closed cross-section structural component 12STAF having a first joint 12STAF15 and an aluminum cast member 14 having a second joint 14I. The closed cross-section structural component 12 and the aluminum cast member 14 are joined by the first joint 12STAF15 and the second joint 14I.

[0178] The closed cross-section structural part 12STAF has a configuration substantially similar to that of the closed cross-section structural part 12STAF of the fifth embodiment, but differs in that the cross-section of the closed cross-section structural part 12STAF of the fifth embodiment is hexagonal, whereas the cross-section of the closed cross-section structural part 12STAF of the present embodiment is quadrangular.

[0179] The first joint portion 12STAF15 of the closed cross-section structural component 12 and the second joint portion 14I of the aluminum cast member 14 have shapes that are complementary to each other.

[0180] The first joint portion 12STAF15 of the closed cross section structural component 12STAF has the same configuration as the portion 12STAF0 of the closed cross section structural component 12STAF other than the first joint portion 12STAF15.

[0181] The second joint portion 14I of the cast aluminum member 14 has a shape that allows the first joint portion 12STAF15 to be inserted therein. The first joint portion 12STAF15 of the closed cross-section structural component 12STAF is embedded in the second joint portion 14I of the cast aluminum member 14.

[0182] (Method of Manufacturing Assembly) The method of manufacturing the assembly 100A0 of the fourteenth embodiment is substantially the same as the method of manufacturing the assembly 10B2 of the fifth embodiment, so only the differences will be described.

[0183] In this embodiment, the mold for producing the aluminum cast member 14 is configured so that the second bonding portion 14I is formed on the surface 14A of the aluminum cast member 14 that faces the closed cross-section structural component 12. The aluminum cast member 14 is produced using this mold.

[0184] The closed cross-section structural component 12STAF and the cast aluminum member 14 are arranged so that the first joint portion 12STAF15 of the closed cross-section structural component 12STAF is embedded in the second joint portion 14I of the cast aluminum member 14.

[0185] (Mobile Body) The assembly 100A0 is provided in a mobile body, for example, a vehicle, as in the fifth embodiment. Specifically, the closed cross-section structural component 12STAF is provided as a frame for a vehicle compartment for passengers.

[0186] In this way, this embodiment also provides a method for manufacturing a moving body, as in the fifth embodiment.

[0187] (Effects) This embodiment has the same effects as the fifth embodiment.

[0188] [Fifteenth embodiment] (Configuration) Figure 12 is a cross-sectional view of an example of an aluminum cast member 14 of an assembly 100A1 according to a fifteenth embodiment. Figure 13 is a cross-sectional view of the assembly 100A1 according to the fifteenth embodiment. Figure 14A is a cross-sectional view taken along line A-A in Figure 13.

[0189] 12 to 14A, the assembly 100A1 includes a closed cross-section structural component 12STAF1122 having a first joint portion 12STAF22, and an aluminum cast member 14 having a second joint portion 14PP. The closed cross-section structural component 12STAF1122 and the aluminum cast member 14 are joined by the first joint portion 12STAF22 and the second joint portion 14PP.

[0190] The closed cross-section structural component 12STAF1122 includes a first joint portion 12STAF22 and a closed cross-section portion 12STAF11.

[0191] The cross section of the closed cross section portion 12STAF11 is rectangular, and the closed cross section portion 12STAF11 has one flange 12F3.

[0192] 12 , a second joint portion 14PP is provided at an end portion of the cast aluminum member 14. The second joint portion 14PP is formed by a first groove 14M1 and a second groove 14M2 provided in a first surface 14SH1 of the cast aluminum member 14. The first groove 14M1 and the second groove 14M2 intersect (e.g., perpendicularly) at one end, and the other end of the first groove 14M1 reaches the fourth surface 14SH4, and the other end of the second groove 14M2 reaches the second surface 14SH2.

[0193] The shape of the second joint portion 14PP matches the shape of the internal space of the closed cross-section structural component 12STAF1122. The second joint portion 14PP has a first end face 14P1 and a second end face 14P2 and a third end face 14P3 that intersect (e.g., perpendicular to) the first end face 14P1 and are parallel to each other. The first end face 14P1, the second end face 14P2, and the third end face 14P3 extend in a direction parallel to the second surface 14SH2 of the aluminum cast member 14. The sides where the first end face 14P1, the second end face 14P2, and the third end face 14P3 intersect with the third surface 14SH3 are the end sides of the three end faces 14P1 to 14P3.

[0194] As shown in Figures 13 and 14A, the closed cross section structural component 12STAF1122 is a tubular member formed to have a rectangular cross section, as described above. The closed cross section structural component 12STAF1122 has a first side surface portion 12STAF1, a fourth side surface portion 12STAF4 facing parallel thereto, and second side surface portions 12STAF2 and 12STAF3 connecting both ends of the first side surface portion 12STAF1 and both ends of the fourth side surface portion 12STAF4. The closed cross section structural component 12STAF1122 is configured so that its cross section is rectangular due to the side surface portions 12STAF1 to 12STAF4. In addition, a flange 12F3 is provided axially on the third side surface portion 12STAF3.

[0195] An opening 12STAF5 is provided in the fourth side surface portion 12STAF4 at the tip end of the closed cross section structural component 12STAF1122 configured as described above. The portion where this opening 12STAF5 is provided is the first joint portion 12STAF22 of the closed cross section structural component 12STAF1122, and is fitted with the second joint portion 14PP. In other words, the shape formed by the first end surface 14P1, the second end surface 14P2, and the third end surface 14P3 of the second joint portion 14PP and the shape formed by the inner walls of the first side surface portion 12STAF1, the second side surface portion 12STAF2, and the third side surface portion 12STAF3 of the first joint portion 12STAF22 have complementary shapes that complement each other. Therefore, the first side surface portion 12STAF1 and the first end face 14P1 are in surface contact, the second side surface portion 12STAF2 and the second end face 14P2 are in surface contact, and the third side surface portion 12STAF3 and the third end face 14P3 are in surface contact. The first side surface portion 12STAF1 and the first end face 14P1, the second side surface portion 12STAF2 and the second end face 14P2, and the third side surface portion 12STAF3 and the third end face 14P3 are respectively joined. This joins the first joint portion 12STAF22 of the closed cross section structural component 12STAF1122 and the second joint portion 14PP of the aluminum cast member 14.

[0196] When the first joint portion 12STAF22 and the second joint portion 14PP are joined, the flange 12F3 is positioned within the first groove 14M1, the tip surface 12STAF6 of the closed cross-section structural component 12STAF1122 abuts against the inner wall of the second groove 14M2, and the opening edge 12STAF51 located at the tip of the fourth side surface portion 12STAF4 abuts against the third surface 14SH3. By providing portions of the tip surface 12STAF6 and the opening edge 12STAF51 that abut against the surface of the aluminum cast member 14, the number of welding or bonding locations can be increased, further improving the joining strength. In particular, the opening edge 12STAF51 is formed at an angle to the axial direction of the opening edge 12STAF51, thereby increasing the joining distance.

[0197] 14A , when the first joint portion 12STAF22 and the second joint portion 14PP are joined, the outer surface of the first side portion 12STAF1 is located on the same plane as or more inward than the first surface 14SH1 of the cast aluminum member 14 and does not protrude beyond the cast aluminum member 14, thereby preventing interference with components disposed around the cast aluminum member 14. Similarly, a step 14L having a depth equal to or greater than the thickness of the second side portion 12STAF2 is formed between the second surface 14SH2 and the second end face 14P2 of the cast aluminum member 14. This step 14L ensures that the second side portion 12STAF2 in the joined state is located on the same plane as or more inward than the second surface 14SH2 of the cast aluminum member 14.

[0198] (Method of Manufacturing Assembly) The closed cross section structural component 12STAF1122 and the aluminum cast member 14 are manufactured. Either the closed cross section structural component 12 or the aluminum cast member 14 may be manufactured first, or both may be manufactured simultaneously.

[0199] The first joint portion 12STAF22 is fitted into the second joint portion 14PP. The first side surface portion 12STAF1 and the first end surface 14P1 are in surface contact, the second side surface portion 12STAF2 and the second end surface 14P2 are in surface contact, and the third side surface portion 12STAF3 and the third end surface 14P3 are in surface contact. Then, the first side surface portion 12STAF1 and the first end surface 14P1, the second side surface portion 12STAF2 and the second end surface 14P2, and the third side surface portion 12STAF3 and the third end surface 14P3 are joined together. This joins the first joint portion 12STAF22 of the closed cross-section structural component 12STAF1122 to the second joint portion 14PP of the aluminum cast member 14.

[0200] (Mobile body) The assembly 100A1 is provided in a mobile body, for example, a vehicle, as in the first embodiment. Specifically, the closed cross-section structural component 12STAF1122 is provided as a frame for a vehicle compartment for passengers. In this way, the fifteenth embodiment also provides a method for manufacturing a mobile body, as in the first embodiment.

[0201] (Effects) This embodiment has the same effects as the first embodiment.

[0202] (Modification of the assembly of the fifteenth embodiment) Next, a modification of the assembly 100A1 of the fifteenth embodiment will be described. The modification of the assembly 100A1 of the fifteenth embodiment is substantially similar to the assembly 100A1 of the fifteenth embodiment, so only the differences will be described.

[0203] FIG. 14B is a cross-sectional view taken along line AA in FIG. 13 in a modification of the 15th embodiment 100A1.

[0204] In the assembly 100A1 of the fifteenth embodiment (see FIG. 14A), the outer surface of the first side portion 12STAF1 does not protrude beyond the first surface 14SH1 of the cast aluminum member 14. In contrast, in this modified example (see FIG. 14B), the outer surface of the first side portion 12STAF1 protrudes beyond the first surface 14SH1 of the cast aluminum member 14, which is different.

[0205] In assembly 100A1 of the fifteenth embodiment (see FIG. 14A), first side surface portion 12STAF1 and first end surface 14P1 are in surface contact with each other. In contrast, in this modified example (see FIG. 14B), first side surface portion 12STAF1 and first end surface 14P1 are spaced apart from each other.

[0206] The aluminum cast member 14 of this modification (see FIG. 14B) includes a protrusion 14Q that protrudes into the groove 14M1. In the assembly 100A1 of the fifteenth embodiment (see FIG. 14A), the flange 12F3 is located within the first groove 14M1. In contrast, this modification (see FIG. 14B) differs in that the flange 12F3 is joined to the protrusion 14Q that protrudes into the first groove 14M1.

[0207] In the assembly 100A1 of the fifteenth embodiment (see FIG. 14A ), the first side surface portion 12STAF1 and the first end face 14P1, the second side surface portion 12STAF2 and the second end face 14P2, and the third side surface portion 12STAF3 and the third end face 14P3 are in surface contact and bonded to each other. In contrast, in this modified example (see FIG. 14B ), only the second side surface portion 12STAF2 and the second end face 14P2 are in surface contact and bonded to the flange 12F3 and the protruding portion 14Q, but the first side surface portion 12STAF1 and the first end face 14P1 are not bonded to the third side surface portion 12STAF3 and the third end face 14P3.

[0208] In this modified assembly, the second side surface portion 12STAF2 and the second end surface 14P2, and the flange 12F3 and the protrusion 14Q have complementary shapes. The assembly of this modified embodiment is joined at two intersecting (e.g., perpendicular) surface pairs. As described above, the two surface pairs are the first surface pair between the second side surface portion 12STAF2 and the second end surface 14P2, and the second surface pair between the flange 12F3 and the protrusion 14Q.

[0209] [16th embodiment] (Configuration) Next, the configuration of the assembly 100A2 of the 16th embodiment will be described. The configuration of the assembly 100A2 of the 16th embodiment is substantially the same as the configuration of the assembly 10B0 of the second embodiment, so only the differences will be described.

[0210] FIG. 15 is an exploded cross-sectional view of an example of an assembly according to the sixteenth embodiment.

[0211] In the first joint portion 12B123 of the closed cross section structural component 12, the angles formed by the first surface 12B1 and the second surface 12B2 and the third surface 12B3 intersecting with the first surface 12B1 are acute angles.

[0212] In the second joint portion 14B123 of the aluminum cast member 14, the first surface 14B1 and the second surface 12B2 and the third surface 12B3 intersecting with the first surface 14B1 form acute angles.

[0213] (Method of Manufacturing Assembly) The method of manufacturing the assembly 100A2 of the sixteenth embodiment is substantially the same as the method of manufacturing the assembly 10B0 of the second embodiment, so only the differences will be described.

[0214] The mold for producing the aluminum cast member 14 is configured so that the angles formed by the first surface 14B1 and the second surface 12B2 and the third surface 12B3 intersecting with the first surface 14B1 are acute angles. The aluminum cast member 14 is produced using the mold.

[0215] The closed cross-section structural component 12STAF is manufactured so that the angles formed by the first surface 12B1 and the second and third surfaces 12B2 and 12B3 intersecting with the first surface 12B1 are acute angles.

[0216] (Mobile Body) The point that the 100A2 is provided in a mobile body, for example, a vehicle, is the same as in the second embodiment. Specifically, the closed cross-section structural component 12STAF is provided as a frame of a vehicle compartment for passengers.

[0217] In this way, the sixteenth embodiment also provides a method for manufacturing a moving body, as in the second embodiment.

[0218] (Effects) This embodiment has the same effects as the second embodiment.

[0219] [Modifications] In each of the above-described embodiments, a cast member made of iron, copper, brass, or the like may be used instead of the aluminum cast member 14. Furthermore, instead of the aluminum cast member 14, the second joining portion may be manufactured by cutting it from a member made of aluminum, iron, copper, brass, or the like.

[0220] The mobile body is not limited to a vehicle, and may be, for example, construction machinery or agricultural equipment. An example of construction machinery is a backhoe. An example of agricultural equipment is a tractor or a combine harvester. The assembly is used in the cabin of each of the construction machinery and agricultural equipment. The mobile body may also be an aircraft. For example, it may be a balloon, an airship, a glider, an airplane, a helicopter, or the like. Furthermore, the mobile body may be a flying object, such as a missile, a space rocket, or a spaceship. Additionally, the mobile body may be a ship, such as a tanker, or the like.

[0221] [Each Assembly] The closed cross section structural component 12 of the assemblies 10A0 to 10A5 and 10B0 to 10B7 of the first to sixteenth embodiments and the above-described modifications is made of a steel pipe material.

[0222] Furthermore, the member 14 is made of a material different from that of the closed cross-section structural components 12 of the assemblies 10A0 to 10A5 and 10B0 to 10B7. The member 14 is an aluminum cast member, but may also be a cast member made of iron, copper, brass, or the like, as in the above-described modified example.

[0223] [Method of manufacturing assembly] The closed cross section structural component 12 and the member 14 are joined, specifically, fitted together, as described above. More specifically, the closed cross section structural component 12 is fitted into the aluminum cast member 14. The closed cross section structural component 12 has flange portions (12F1, 12F2, 12F3), and the flange portions are fitted together by fitting them into recesses (flange portion accommodating portions 14C1, 14C2, 14C3) provided in the aluminum cast member 14.

[0224] [Steel Pipe] As described above, the closed cross-section structural component is a steel pipe (12STAF) made of a single steel pipe material, and the steel pipe (12STAF) can be fitted with a member made of a material different from the steel pipe.

[0225] (Notes) The following notes are proposed based on the first to sixteenth embodiments and the above-described modifications.

[0226] (Supplementary Note 1) An assembly comprising a closed cross-section structural component made of a steel pipe material and a member made of a material different from the closed cross-section structural component, wherein the closed cross-section structural component and the member are fitted together. (Effect) In the prior art, the closed cross-section structural component and the aluminum cast member are joined by flat contact. However, the invention of Supplementary Note 1 can increase the joint strength between the closed cross-section structural component and the material different from the closed cross-section structural component compared to the prior art, since the closed cross-section structural component and the material different from the closed cross-section structural component are fitted together.

[0227] (Supplementary Note 2) The assembly according to Supplementary Note 1, wherein the member is an aluminum cast member. (Effect) Since the density of aluminum is lower than that of iron, copper, or brass, the invention of Supplementary Note 2 can be made lighter than members made of iron, etc.

[0228] (Supplementary Note 3) The assembly according to Supplementary Note 2, in which the closed cross section structural component is fitted into the aluminum cast component by being fitted in. (Effect) Since the closed cross section structural component is fitted into the aluminum cast component by being fitted in this way, the invention of Supplementary Note 3 can increase the joining strength between the closed cross section structural component and the aluminum cast component compared to the prior art, which joins them by planar contact.

[0229] (Supplementary Note 4) The assembly according to Supplementary Note 2 or Supplementary Note 2, wherein the closed cross section structural component has a flange portion, and the flange portion is fitted by being fitted into a recess provided in the aluminum cast component. (Effect) Since the flange portion of the closed cross section structural component is fitted by being fitted into a recess provided in the aluminum cast component, the invention of Supplementary Note 4 can facilitate positioning of the closed cross section structural component and the aluminum cast component.

[0230] (Supplementary Note 5) A steel pipe made of a steel pipe material, wherein the steel pipe is capable of being fitted with a member made of a material different from the steel pipe. (Effect) Because the steel pipe is capable of being fitted with a member made of a material different from the steel pipe, the invention of Supplementary Note 5 can increase the joining strength between a closed cross-section structural component and a material different from the closed cross-section structural component compared to the prior art, which joins by plane contact.

[0231] (Supplementary Note 6) A method for manufacturing an assembly, comprising fitting a closed cross-section structural component made of a steel pipe material with a member made of a material different from the closed cross-section structural component. (Effect) In the prior art, the closed cross-section structural component and the aluminum cast member are joined by planar contact. However, this embodiment can increase the joint strength between the closed cross-section structural component and the aluminum cast member for fitting the closed cross-section structural component and the aluminum cast member compared to the prior art. In the prior art, the closed cross-section structural component and the aluminum cast member are joined by planar contact. However, the invention of Supplementary Note 6 can increase the joint strength between the closed cross-section structural component and the material different from the closed cross-section structural component for fitting the closed cross-section structural component and the material different from the closed cross-section structural component compared to the prior art.

Claims

1. An assembly comprising a closed section structural component made of steel pipe material and a member made of a material different from that of the closed section structural component, wherein the closed section structural component and the member are fitted together.

2. An assembly as claimed in claim 1, wherein said member is an aluminum casting.

3. The assembly according to claim 2, wherein the closed cross-sectional structural part is fitted into the aluminum casting part by being inserted therein.

4. An assembly as described in claim 2, wherein the closed cross-sectional structural part has a flange portion, and the flange portion is fitted into a recess provided in the aluminum casting part to engage with the aluminum casting part.

5. A steel pipe made of a steel pipe material, said steel pipe being capable of being fitted with a member made of a material different from said steel pipe.

6. A method for manufacturing an assembly, comprising fitting a closed cross-section structural component made of a steel pipe material with a member made of a material different from that of the closed cross-section structural component to manufacture the assembly.

Images