Assembly, steel pipe and method for manufacturing assembly

Abstract

This disclosure improves the bonding strength between a closed-section member and a component compared to the prior art. The assembly comprises: a closed-section member made of steel tubing, and a component made of a material different from the closed-section member, the closed-section member and the component being fitted together. Thus, compared to the prior art which uses planar contact for bonding, it is possible to improve the bonding strength between the closed-section member and materials different from the closed-section member, enabling the closed-section member to bond with materials different from the closed-section member.

Description

Technical Field

[0001] The technology disclosed herein relates to an assembly, a steel pipe, and a method for manufacturing the assembly. Background Technology

[0002] Japanese Patent Application Publication No. 2009-220141 discloses a manufacturing apparatus for tubular products. The apparatus includes: a blow molding die consisting of a lower die and an upper die; a tube support mechanism that horizontally supports the tube between the lower and upper dies in a liftable manner; an electric heating mechanism that electrically heats the tube supported by the tube support mechanism; and a gas blowing mechanism that blows high-pressure gas into the heated tube. The tube is heated to a quenching temperature by the electric heating, then closed by the blow molding die, expands by the blowing of high-pressure gas, and comes into contact with the die. Since the tube is heated to the quenching temperature while the die is at room temperature, the tube is rapidly cooled within the die for quenching. This process manufactures a tubular product.

[0003] This tubular product is used in conjunction with an aluminum casting. Specifically, the tubular product and the aluminum casting are configured in planar contact. The connection between the tubular product and the aluminum casting is as follows: a bolt is inserted from the inside of the tubular product into a nut embedded in the aluminum casting and tightened. Summary of the Invention

[0004] The technical problem to be solved by the invention However, if a certain force is applied to the aluminum casting, this force is transmitted from the aluminum casting through the mechanical fasteners to the tubular product in contact with the plane of the aluminum casting, resulting in weak joint strength. Specifically, stress concentration sometimes occurs in the mechanical fasteners, causing buckling at the joint.

[0005] The technology disclosed herein was made in view of the above circumstances, and its purpose is to provide an assembly, steel pipe and assembly manufacturing method that enables the joint strength of closed section members and components to be stronger than that of the prior art.

[0006] means for solving technical problems An assembly according to a first embodiment of the present disclosure comprises: a closed-section member having a first joint and a component having a second joint, the closed-section member and the component being joined by the first joint and the second joint, the first joint and the second joint having complementary shapes.

[0007] The movable body of the second embodiment has the closed-section member of the first embodiment as a frame.

[0008] The third embodiment is an assembly method for an assembly comprising: a closed-section member having a first joint portion and a component having a second joint portion. The assembly method includes a step of joining the first joint portion of the closed-section member with the second joint portion of the component, wherein the first joint portion and the second joint portion have complementary shapes.

[0009] The component in the fourth embodiment is a component that engages with a closed-section member having a first engagement portion, the component having a second engagement portion having a shape complementary to the first engagement portion, the closed-section member engaging with the component through the first engagement portion and the second engagement portion.

[0010] The fifth embodiment is an assembly comprising: a closed-section member made of steel tubing, and a component made of a material different from the closed-section member, wherein the closed-section member and the component are fitted together.

[0011] The sixth embodiment is a steel pipe, which is made of steel tubing and can be fitted with components made of a different material than the steel tubing.

[0012] The seventh embodiment of the assembly manufacturing method involves manufacturing the assembly by fitting together a closed-section member made of steel tubing and a component made of a material different from the closed-section member.

[0013] Public effect This disclosure is made in view of the above circumstances, and enables the joint strength between closed-section members and components to be stronger than that of the prior art. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of an example of the closed-section member and assembly of the first embodiment.

[0015] Figure 2 This is a cross-sectional view of an example of the assembly of the second embodiment.

[0016] Figure 3 This is a cross-sectional view of an example of the assembly of the third embodiment.

[0017] Figure 4 This is a cross-sectional view of an example of the assembly of the fourth embodiment.

[0018] Figure 5 This is a cross-sectional view of an example of a closed-section member and an assembly according to the fifth embodiment.

[0019] Figure 6 This is a cross-sectional view of an example of the assembly of the sixth embodiment.

[0020] Figure 7 This is a cross-sectional view of an example of the assembly of the seventh embodiment.

[0021] Figure 8A This is a cross-sectional view of an example of the assembly of the eighth embodiment.

[0022] Figure 8B This is a cross-sectional view of an example of the assembly of the 9th embodiment.

[0023] Figure 9A This is a cross-sectional view of an example of the assembly of the tenth embodiment.

[0024] Figure 9B This is a cross-sectional view of an example of the assembly of the 11th embodiment.

[0025] Figure 10A This is a cross-sectional view of an example of the assembly of the 12th embodiment.

[0026] Figure 10B This is a cross-sectional view of an example of the assembly of the 13th embodiment.

[0027] Figure 11 This is a cross-sectional view of an example of the assembly of the 14th embodiment.

[0028] Figure 12 This is a cross-sectional view of an example of an aluminum casting of the assembly according to the 15th embodiment.

[0029] Figure 13 This is a cross-sectional view of an example of the assembly of the 15th embodiment.

[0030] Figure 14A yes Figure 13 AA sectional view.

[0031] Figure 14B This is a variation of the assembly in the 15th embodiment. Figure 13 AA sectional view.

[0032] Figure 15 This is an exploded cross-sectional view of an example of the assembly of the 16th embodiment. Detailed Implementation

[0033] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0034] [First Implementation] (structure) Figure 1This is a cross-sectional view of an example of the closed-section member 12 and the assembly 10A0 according to the first embodiment. The assembly 10A0 includes: a closed-section member 12 having a first joint portion 12B123; and an aluminum casting 14 having a second joint portion 14B123. The closed-section member 12 and the aluminum casting 14 are joined by the first joint portion 12B123 and the second joint portion 14B123.

[0035] The closed-section member 12 is composed of multiple structural parts 12A and 12B (e.g., two structural parts 12A and 12B). Each of the two structural parts 12A and 12B is manufactured by bending a flat plate to form multiple surfaces (e.g., three surfaces). Flanges 12FA1 and 12FA2 are formed at both ends of structural part 12A. Flanges 12FB1 and 12FB2 are formed at both ends of structural part 12B. Flanges 12FA1 and 12FB1, and flanges 12FA2 and 12FB2 are formed, for example, by spot welding, to form a first overlapping flange portion 12F1 and a second overlapping flange portion 12F2. The closed-section member 12 is thus manufactured.

[0036] Closed section member 12 is along with Figure 1 The component extends perpendicularly to the plane of the paper. The cross-section of the closed-section member 12 is hollow and polygonal. The cross-section of the closed-section member 12 is, for example, hexagonal. However, the cross-section is not limited to hexagon; it can be quadrilateral or pentagonal. Moreover, it can have curves.

[0037] The aluminum casting 14 is manufactured by heating aluminum above its melting point to melt it, pouring the molten aluminum into a mold made of sand or the like, and then cooling it to form the second joint 14B123. The aluminum casting 14 is aligned with... Figure 1 A component that extends vertically from the paper surface.

[0038] The first joint 12B123 of the closed-section member 12 and the second joint 14B123 of the aluminum casting 14 have complementary shapes. The first joint 12B123 has a protruding shape, and the second joint 14B123 has a recessed shape on the surface 14A on the side of the closed-section member 12. The first joint 12B123 is embedded in the second joint 14B123. Specifically, more than one-third of the perimeter of the cross-section of the first joint 12B123 is embedded in the second joint 14B123.

[0039] The first joint 12B123 of the closed section member 12 has a first surface 12B1 and a second surface 12B2 and a third surface 12B3 intersecting the first surface 12B1. The first surface 12B1, the second surface 12B2 and the third surface 12B3 are the outer surfaces of the first joint 12B123. The angle formed by the first surface 12B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 12B1 is an obtuse angle.

[0040] The second joint 14B123 of the aluminum casting 14 has a first surface 14B1 and a second surface 14B2 and a third surface 14B3 intersecting the first surface 14B1. The first surface 14B1, the second surface 14B2, and the third surface 14B3 are the inner surfaces of the second joint 14B123. The angle formed by the first surface 14B1 and the second surface 14B2 and the third surface 14B3 intersecting the first surface 14B1 is an obtuse angle.

[0041] The angle formed by face 12B1 and face 12B2 is equal to the angle formed by face 14B1 and face 14B2. The angle formed by face 12B1 and face 12B3 is equal to the angle formed by face 14B1 and face 14B3. Face 12B1 of the first joint 12B123 is joined to face 14B1 of the second joint 14B123, face 12B2 is joined to face 14B2, and face 12B3 is joined to face 14B3.

[0042] Assembly 10A0 also includes a reinforcing member 16 that strengthens the connection between the closed-section member 12 and the aluminum casting 14. The reinforcing member 16 is joined to the closed-section member 12 or the aluminum casting 14 in such a way that it covers the portion of the closed-section member 12 that is not embedded in the aluminum casting 14. It is shaped to cover the portion of the aluminum casting 14 that is not embedded by bending.

[0043] (Manufacturing method of the assembly) Next, the manufacturing method of assembly 10A0 will be described. There are two manufacturing methods for assembly 10A0: Method 1 and Method 2.

[0044] The first method will be explained.

[0045] As described above, the closed-section member 12 and the aluminum casting 14 are manufactured. The manufacture of the closed-section member 12 and the aluminum casting 14 can be performed either first or both simultaneously.

[0046] The closed-section member 12 and the aluminum casting 14 are arranged such that the first joint 12B123 is embedded in the second joint 14B123. Specifically, the closed-section member 12 and the aluminum casting 14 are arranged such that the first surface 12B1 of the first joint 12B123 contacts the first surface 14B1 of the second joint 14B123, the second surface 12B2 contacts the second surface 14B2, and the third surface 12B3 contacts the third surface 14B3. The closed-section member 12 and the aluminum casting 14 are arranged by moving either one of them closer to the other, or by moving the closed-section member 12 and the aluminum casting 14 closer to each other respectively.

[0047] The first joint 12B123 of the closed-section member 12 and the second joint 14B123 of the aluminum casting 14 are joined. Specifically, the first surface 12B1 and the first surface 14B1, the second surface 12B2 and the second surface 14B2, and the third surface 12B3 and the third surface 14B3 are joined respectively by mechanical fastening, welding, adhesive, or other joining methods. As described above, mechanical fastening, for example, uses bolts and nuts to join the first joint 12B123 of the closed-section member 12 and the second joint 14B123 of the aluminum casting 14. Welding, for example, is spot welding, arc (plasma) welding, or laser welding. Other joining methods include spot joining or continuous joining based on friction stir bonding.

[0048] The reinforcing member 16 is joined to the closed-section member 12 or the aluminum casting 14 in such a way that it covers the portion of the closed-section member 12 that is not embedded in the aluminum casting 14. Alternatively, as described above, this joining is performed by mechanical fastening, welding, adhesive or other joining methods.

[0049] The second method will be explained. The second method is largely the same as the first method, so the differences will be explained.

[0050] The structural part 12B and the aluminum casting 14 are arranged such that the first surface 12B1 of the first joint 12B123 contacts the first surface 14B1 of the second joint 14B123, the second surface 12B2 contacts the second surface 14B2, and the third surface 12B3 contacts the third surface 14B3. The structural part 12B and the aluminum casting 14 are arranged such that either the structural part 12B or the aluminum casting 14 is brought close to the other, or the structural part 12B and the aluminum casting 14 are brought close to each other respectively.

[0051] The first joint 12B123 and the second joint 14B123 are joined together. Alternatively, as described above, the joint can be performed by mechanical fastening, welding, adhesive or other joining methods.

[0052] The structural part 12A and the structural part 12B with the aluminum casting 14 attached are moved closer to each other, or the structural part 12A and the structural part 12B with the aluminum casting 14 attached are moved closer to each other respectively.

[0053] For example, by spot welding flanges 12FA1 and 12FB1, and flanges 12FA2 and 12FB2 respectively, a first overlapping flange portion 12F1 and a second overlapping flange portion 12F2 are formed. In this stage, a closed section member 12 is manufactured.

[0054] The reinforcing component 16 is configured as described above.

[0055] (Moving body) The assembly 10A0 is installed on a moving body, such as a vehicle. Specifically, the closed-section member 12 is mounted as the frame of a passenger compartment for use by passengers.

[0056] More specifically, for example, aluminum castings 14 are provided on each side of the front left and right wheels and each side of the rear left and right wheels. Closed-section members 12 are joined to the aluminum castings 14 provided on the front left wheel side and the rear left wheel side, and closed-section members 12 are joined to the aluminum castings 14 provided on the front right wheel side and the rear right wheel side.

[0057] Assembly 10A0 is manufactured on each side of the front left and right wheels and on each side of the rear left and right wheels. As described above, reinforcing member 16 is disposed on each assembly 10A0.

[0058] Thus, in this embodiment, a method for manufacturing a mobile body is also provided.

[0059] (Effect) In the prior art, closed-section members are joined to aluminum castings in a planar contact manner. However, in this embodiment, the first and second joints used to join the closed-section member and the aluminum casting have complementary shapes, thus enabling a stronger joint strength between the closed-section member and the aluminum casting than in the prior art.

[0060] In this embodiment, if a certain force is applied to the aluminum casting, the force is transmitted from the aluminum casting to the closed-section member that is joined to the aluminum casting. At this time, as described above, the first joint and the second joint have complementary shapes, so the force acting on the aluminum casting is easily transmitted from the aluminum casting to the closed-section member. Therefore, in this embodiment, buckling due to stress concentration in the first joint and the second joint can be suppressed.

[0061] In this embodiment, the first joint is embedded in the second joint, thus preventing buckling of the portion of the first joint embedded in the second joint due to stress concentration.

[0062] The first joint of the closed-section member and the second joint of the aluminum casting have complementary shapes. The first joint is protruding, and the second joint is recessed, with the first joint embedded in the second joint. Therefore, in this embodiment, the lateral direction (the direction perpendicular to the length direction) of the closed-section member can be made... Figure 1 The positioning accuracy (vertical direction of the paper) is higher than that of existing technologies.

[0063] [Second Implementation] (structure) Next, the structure of the assembly 10B0 of the second embodiment will be described. The structure of the assembly 10B0 of the second embodiment is substantially the same as that of the assembly 10A0 of the first embodiment, so the different parts will be described.

[0064] Figure 2 This is a cross-sectional view of an example of the assembly 10B0 of the second embodiment.

[0065] The assembly 10B0 includes a closed-section member 12STAF, which replaces the closed-section member 12 of the first embodiment.

[0066] The closed section member 12STAF is a closed section component that uses a single tube to integrally form two flanges 12F11, 12F22 and the first joint 12B123 into a single tube.

[0067] The closed-section member 12STAF is manufactured as follows: A hollow tube is heated to a quenching temperature by electric heating, closed by a blow molding die (the die is manufactured to form two flanges 12F11, 12F22 and a first joint 12B123), and expanded by high-pressure gas, which then contacts the blow molding die. The tube is heated to the quenching temperature, while the blow molding die, cooled by a water circulation mechanism, is at room temperature; therefore, the tube is rapidly cooled and quenched by the die. This manufactures the closed-section member 12STAF.

[0068] In addition, although the example given is heating the pipes with electricity, it could also be heating them with a furnace.

[0069] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B0 of the second embodiment is substantially the same as the first method of the assembly 10A0 of the first embodiment, except that a closed section member 12STAF is used instead of the closed section member 12 of the first embodiment.

[0070] (Moving body) The assembly 10B0 is installed on a moving body (e.g., a vehicle) in the same way as in the first embodiment. Specifically, a closed-section member 12STAF is mounted as the frame of the passenger compartment for use by occupants.

[0071] Thus, in the second embodiment, a method for manufacturing a mobile body is also provided, just as in the first embodiment.

[0072] (Effect) The assembly of the second embodiment has the same effect as the assembly of the first embodiment.

[0073] The assembly of the second embodiment uses a closed-section member 12STAF.

[0074] Therefore, the plate thickness of the closed section member 12STAF can be lower than that of the closed section member 12 in the first embodiment, thereby achieving weight reduction.

[0075] Because of the use of closed section members 12STAF, the cross-section of the pipe can be changed or the cross-sectional shape can be made more complex in the length direction. Therefore, the cross-sectional performance can be improved within a limited layout, thereby improving the strength and rigidity of the closed section members 12STAF.

[0076] Although the closed-section member 12STAF is a tubular structure, it can be molded into an integral closed section with a flange. Therefore, the closed-section member 12STAF is easy to join with other components. As a result, an assembly consisting of multiple parts can be integrated, thereby reducing the number of molds and manufacturing processes.

[0077] By employing electric heating to heat the pipe to manufacture the closed-section member 12STAF, the equipment can be made more compact compared to the first embodiment, thereby reducing equipment investment costs compared to the first embodiment.

[0078] [Third Implementation] (structure) Next, the structure of the assembly 10A1 of the third embodiment will be described. The structure of the assembly 10A1 of the third embodiment is substantially the same as that of the assembly 10A0 of the first embodiment, so the different parts will be described.

[0079] Figure 3 This is a cross-sectional view of an example of the assembly 10A1 of the third embodiment.

[0080] On the surface 14A of the aluminum casting 14 located on the side of the closed section member 12, flange receiving portions 14C1 and 14C2 are formed to accommodate the first overlapping flange portion 12F1 and the second overlapping flange portion 12F2. The flange receiving portions 14C1 and 14C2 are recessed portions on the surface 14A.

[0081] On one of the first surfaces 12B1 and 14B1, a plurality of protrusions are formed at predetermined intervals in the longitudinal direction, and on the other of the first surfaces 12B1 and 14B1, a plurality of openings for inserting the protrusions are formed. In this embodiment, the first surface 14B1 has a protrusion 14T, and an opening 12K for inserting the protrusion 14T is formed on the first surface 12B1.

[0082] (Manufacturing method of the assembly) The manufacturing method of assembly 10A1 is substantially the same as the manufacturing method of assembly 10A0 of the first embodiment (the first method and the second method), so the different parts will be described.

[0083] In this embodiment, the mold used to manufacture the aluminum casting 14 is configured such that flange receiving portions 14C1 and 14C2 are formed on the surface 14A of the closed-section member 12 side of the aluminum casting 14, and a protrusion 14T is formed on the first surface 14B1 of the second joint portion 14B123. The aluminum casting 14 is manufactured using this mold.

[0084] An opening 12K for inserting the protrusion 14T is formed on the first surface 12B1 of the first joint 12B123 of the closed section member 12.

[0085] In the first method, the closed section member 12 and the aluminum casting 14 are configured such that the protrusion 14T is inserted into the opening 12K.

[0086] In the second method, the structural part 12B and the aluminum casting 14 are arranged such that the protrusion 14T is inserted into the opening 12K.

[0087] The first overlapping flange portion 12F1 and the second overlapping flange portion 12F2 are accommodated in the flange portion receiving portions 14C1 and 14C2.

[0088] (Moving body) The assembly 10A1 is installed on a moving body, such as a vehicle. Specifically, the closed-section member 12 is mounted as the frame of a passenger compartment for use by passengers.

[0089] Thus, in the third embodiment, a method for manufacturing a movable body is also provided, just as in the first embodiment.

[0090] (Effect) This embodiment achieves the same effect as the first embodiment.

[0091] In the third embodiment, since the protrusion 14T is inserted into the opening 12K, the positioning accuracy of the closed section member 12 in the longitudinal direction can be improved compared with the first embodiment.

[0092] [Fourth Implementation] (structure) Next, the structure of the assembly 10B1 of the fourth embodiment will be described. The structure of the assembly 10B1 of the fourth embodiment is substantially the same as that of the assembly 10B0 of the second embodiment, so the different parts will be described.

[0093] Figure 4 This is a cross-sectional view of an example of the assembly 10B1 of the fourth embodiment.

[0094] In the fourth embodiment, as in the third embodiment, flange receiving portions 14C1 and 14C2 for receiving flanges 12F11 and 12F22 are formed on the surface 14A of the aluminum casting 14 on the side of the closed section member 12.

[0095] On one of the first surfaces 12B1 and 14B1, a plurality of protrusions are formed at predetermined intervals in the longitudinal direction, and on the other of the first surfaces 12B1 and 14B1, a plurality of openings for inserting the protrusions are formed. In this embodiment, similar to the third embodiment, the first surface 14B1 has a protrusion 14T, and an opening 12K for inserting the protrusion 14T is formed on the first surface 12B1.

[0096] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B1 in the fourth embodiment is substantially the same as that of the assembly 10B0 in the second embodiment. In this embodiment, the mold used to manufacture the aluminum casting 14 is also configured similarly to that in the third embodiment: flange receiving portions 14C1 and 14C2 are formed on the surface 14A on the side of the closed-section member 12 of the aluminum casting 14, and a protrusion 14T is formed on the first surface 14B1 of the second joint portion 14B123. The aluminum casting 14 is manufactured using this mold.

[0097] An opening 12K for inserting a protrusion 14T is formed on the first surface 12B1 of the first joint 12B123 of the closed section member 12STAF.

[0098] The closed section member 12STAF and the aluminum casting 14 are arranged such that the flanges 12F11 and 12F22 are accommodated in the flange receiving portions 14C1 and 14C2 and the protrusion 14T is inserted into the opening portion 12K.

[0099] (Moving body) The assembly 10B1 is installed on a moving body (e.g., a vehicle) in the same way as in the second embodiment. Specifically, a closed-section member 12STAF is mounted as the frame of the passenger compartment for use by passengers.

[0100] Thus, in the fourth embodiment, a method for manufacturing a mobile body is also provided, just as in the second embodiment.

[0101] (Effect) This embodiment achieves the same effect as the second embodiment.

[0102] In the fourth embodiment, since the protrusion 14T is inserted into the opening 12K, the positioning accuracy of the closed section member 12 in the length direction can be improved compared with the second embodiment.

[0103] [Fifth Implementation] (structure) Next, the structure of the assembly 10B2 of the fifth embodiment will be described. The structure of the assembly 10B2 of the fifth embodiment is substantially the same as that of the assembly 10B1 of the fourth embodiment, so the different parts will be described.

[0104] Figure 5 These are cross-sectional views of the closed-section member 12STAF and the assembly 10B2 of the fifth embodiment.

[0105] The closed-section member 12STAF of the fifth embodiment has a flange 12F3.

[0106] A flange receiving portion 14C3 for receiving a flange 12F3 is formed on the first surface 14B1 of the second joint 14B123 of the aluminum casting 14.

[0107] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B2 in the fifth embodiment is substantially the same as the manufacturing method of the assembly 10B1 in the fourth embodiment. In this embodiment, the mold used to manufacture the aluminum casting 14 is configured such that a flange receiving portion 14C3 is formed on the first surface 14B1 of the second joint portion 14B123. The aluminum casting 14 is manufactured using this mold.

[0108] The closed section member 12STAF and the aluminum casting 14 are arranged such that the flange 12F3 of the closed section member 12STAF is received in the flange portion receiving portion 14C32 of the first surface 14B1 of the second joint portion 14B123 of the aluminum casting 14.

[0109] (Moving body) The assembly 10B2 is configured in the same way as in the fourth embodiment, whereby it is placed on a moving body (e.g., a vehicle). Specifically, the closed-section member 12STAF is mounted as the frame of the passenger compartment for use by the occupants.

[0110] Thus, in the fifth embodiment, a method for manufacturing a movable body is also provided, just as in the fourth embodiment.

[0111] (Effect) This embodiment achieves the same effect as the second embodiment.

[0112] In the fifth embodiment, the closed-section member 12STAF and the aluminum casting 14 are arranged such that the flange 12F3 of the closed-section member 12STAF is received in the flange receiving portion 14C3 of the first surface 14B1 of the second joint portion 14B123 of the aluminum casting 14. Therefore, compared with the prior art, the lateral (direction perpendicular to the length direction) of the closed-section member 12STAF can be improved. Figure 5 The positioning accuracy of the paper in the vertical direction.

[0113] [Sixth Implementation] (structure) Next, the structure of the assembly 10A2 of the sixth embodiment will be described. The structure of the assembly 10A2 of the sixth embodiment is substantially the same as that of the assembly 10A0 of the first embodiment, so the different parts will be described.

[0114] Figure 6 This is a cross-sectional view of an example of the assembly of the sixth embodiment.

[0115] In the first embodiment, the distance between the surface 14A of the closed section member 12 side of the aluminum casting 14 and the first overlapping flange portion 12F1 and the second overlapping flange portion 12F2 is 0.

[0116] In contrast, in the sixth embodiment, the distances between the surface 14A of the closed section member 12 side of the aluminum casting 14 and the first overlapping flange portion 12F1 and the second overlapping flange portion 12F2 are L1 and L2, respectively, which are greater than 0.

[0117] (Manufacturing method of the assembly) The manufacturing method of the assembly 10A2 in the sixth embodiment is substantially the same as that of the assembly 10A0 in the first embodiment. The closed-section member 12 and the aluminum casting 14 are arranged such that the intervals between the surface 14A of the closed-section member 12 side of the aluminum casting 14 and the first overlapping flange 12F1 and the second overlapping flange 12F2 are L1 and L2, respectively. This allows for the insertion of components such as wire harnesses between the surface 14A of the closed-section member 12 side of the aluminum casting 14 and the first overlapping flange 12F1 and the second overlapping flange 12F2, increasing the flexibility in component arrangement.

[0118] In addition, in the manufacturing method of the assembly 10A2 in the sixth embodiment, although the reinforcing member 16 is not configured as in the first embodiment, the reinforcing member 16 can be configured as in the first embodiment.

[0119] (Moving body) The assembly 10A2 is installed on a moving body (e.g., a vehicle) in the same way as in the first embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0120] Thus, in the sixth embodiment, a method for manufacturing a mobile body is also provided, just as in the first embodiment.

[0121] (Effect) This embodiment achieves the same effect as the first embodiment.

[0122] [Seventh Implementation] (structure) Next, the structure of the assembly 10B3 of the seventh embodiment will be described. The structure of the assembly 10B3 of the seventh embodiment is substantially the same as that of the assembly 10A2 of the sixth embodiment, so the different parts will be described.

[0123] Figure 7 This is a cross-sectional view of an example of the assembly 10B3 of the seventh embodiment.

[0124] The difference in the assembly 10B3 of the seventh embodiment is that, instead of the closed-section member 12 of the assembly 10A2 of the sixth embodiment, it has the closed-section member 12STAF of the second embodiment.

[0125] In the seventh embodiment, the distances between the face 14A on the closed-section member 12 side of the aluminum casting 14 and the flanges 12F11 and 12F22 are L1 and L2, respectively, which are greater than 0. Therefore, components such as wire harnesses can be inserted between the face 14A on the closed-section member 12 side of the aluminum casting 14 and the flanges 12F11 and 12F22, thereby increasing the freedom of component arrangement.

[0126] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B3 in the seventh embodiment is substantially the same as that of the assembly 10A2 in the sixth embodiment. Instead of the closed-section member 12 of the assembly 10A2 in the sixth embodiment, the closed-section member 12STAF of the second embodiment is used.

[0127] In addition, in the manufacturing method of the assembly 10B3 in the seventh embodiment, although the reinforcing member 16 is not configured as in the first embodiment, the reinforcing member 16 can be configured as in the first embodiment.

[0128] (Moving body) The assembly 10B3 is installed on a moving body (e.g., a vehicle) in the same way as in the sixth embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0129] Thus, in the seventh embodiment, as in the sixth embodiment, a method for manufacturing a movable body is also provided.

[0130] (Effect) This embodiment achieves the same effect as the sixth embodiment.

[0131] [Eighth Implementation] (structure) Next, the structure of the assembly 10A3 of the eighth embodiment will be described. The structure of the assembly 10A3 of the eighth embodiment is substantially the same as that of the assembly 10A2 of the sixth embodiment, so the different parts will be described.

[0132] Figure 8A This is a cross-sectional view of an example of the assembly 10A3 of the eighth embodiment.

[0133] The first surface 12B1 of the first joint portion 12B123 of the closed section member 12 of the assembly 10A3 in the eighth embodiment has a protrusion 12T. A recess 14C4 for inserting the protrusion 12T is formed on the first surface 14B1 of the second joint portion 14B123 of the aluminum casting 14.

[0134] (Manufacturing method of the assembly) The manufacturing method of the assembly 10A3 in the eighth embodiment is substantially the same as the manufacturing method of the assembly 10A2 in the sixth embodiment, so the different parts will be described.

[0135] The mold for the aluminum casting 14 is configured such that a recess 14C4 is formed on the first surface 14B1 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0136] The closed section member 12 is manufactured in such a way that it has a protrusion 12T on the first surface 12B1.

[0137] The structural part 12B and the aluminum casting 14 are arranged such that the protrusion 12T on the first surface 12B1 of the first joint 12B123 of the closed section member 12 is inserted into the recess 14C4 formed on the first surface 14B1 of the second joint 14B123 of the aluminum casting 14.

[0138] (Moving body) The assembly 10A3 is installed on a moving body (e.g., a vehicle) in the same way as in the sixth embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0139] Thus, in the 8th embodiment, a method for manufacturing a mobile body is also provided, just as in the 6th embodiment.

[0140] (Effect) This embodiment achieves the same effect as the sixth embodiment.

[0141] In the eighth embodiment, the structural member 12B and the aluminum casting 14 are arranged such that the protrusion 12T on the first surface 12B1 of the first joint 12B123 of the closed section member 12 is inserted into the recess 14C4 formed on the first surface 14B1 of the second joint 14B123 of the aluminum casting 14. Therefore, compared with the sixth embodiment, the lateral (direction perpendicular to the length direction) of the closed section member 12 can be improved. Figure 8A The positioning accuracy of the paper in the vertical direction.

[0142] [Ninth Implementation] (structure) Next, the structure of the assembly 10A4 of the ninth embodiment will be described. The structure of the assembly 10A4 of the ninth embodiment is substantially the same as that of the assembly 10A3 of the eighth embodiment, so the different parts will be described.

[0143] Figure 8B This is a cross-sectional view of an example of the assembly 10A4 of the 9th embodiment.

[0144] The first surface 12B1 of the closed-section member 12 of the assembly 10A4 in the ninth embodiment has a protrusion 12T. A recess 14C4 for inserting the protrusion 12T is formed on the surface 14A of the aluminum casting 14 on the side of the closed-section member 12.

[0145] The convex portion 12T and the concave portion 14C4 are complementary shapes. The convex portion 12T is embedded in the concave portion 14C4.

[0146] The protrusion 12T is an example of the "first joint" of the present disclosure. The recess 14C4 is an example of the "second joint" of the present disclosure.

[0147] (Manufacturing method of the assembly) The manufacturing method of the assembly 10A4 in the ninth embodiment is substantially the same as the manufacturing method of the assembly 10A3 in the eighth embodiment, therefore the different parts will be described.

[0148] The mold for the aluminum casting 14 is configured such that a recess 14C4 is formed on the face 14A on the side of the closed-section member 12 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0149] The closed section member 12 and the aluminum casting 14 are arranged such that the protrusion 12T on the first surface 12B1 of the closed section member 12 is inserted into the recess 14C4 on the surface 14A of the closed section member 12 of the aluminum casting 14.

[0150] (Moving body) The assembly 10A4 is installed on a moving body (e.g., a vehicle) in the same way as in the eighth embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0151] Thus, in the 9th embodiment, as in the 8th embodiment, a method for manufacturing a movable body is also provided.

[0152] (Effect) This embodiment achieves the same effect as the 8th embodiment.

[0153] [10th Implementation] Next, the structure of the assembly 10B4 of the tenth embodiment will be described. The structure of the assembly 10B4 of the tenth embodiment is substantially the same as that of the assembly 10B3 of the seventh embodiment, so the different parts will be described.

[0154] Figure 9A This is a cross-sectional view of an example of the assembly 10B4 of the tenth embodiment.

[0155] The first surface 12B1 of the closed-section member 12 of the assembly 10B4 in the tenth embodiment has a recess 12C. The first surface 14B1 of the aluminum casting 14 has a protrusion 14T that is inserted into the recess 12C.

[0156] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B4 in the 10th embodiment is substantially the same as the manufacturing method of the assembly 10B3 in the 7th embodiment, therefore the different parts will be described.

[0157] The mold for the aluminum casting 14 is configured to form a protrusion 14T on the first surface 14B1 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0158] The closed-section member 12 is manufactured in such a way that it has a recess 12C on the first surface 12B1.

[0159] The closed section member 12 and the aluminum casting 14 are arranged such that the protrusion 14T formed on the first surface 14B1 of the aluminum casting 14 is inserted into the recess 12C on the first surface 12B1 of the closed section member 12.

[0160] (Moving body) The assembly 10B4 is installed on a moving body (e.g., a vehicle) in the same way as in the seventh embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0161] Thus, in the 10th embodiment, as in the 7th embodiment, a method for manufacturing a movable body is also provided.

[0162] (Effect) This embodiment achieves the same effect as the seventh embodiment.

[0163] [11th Implementation] (structure) Next, the structure of the assembly 10B5 in the 11th embodiment is substantially the same as that of the assembly 10B4 in the 10th embodiment, so the different parts will be described.

[0164] Figure 9B This is a cross-sectional view of an example of the assembly 10B5 of the 11th embodiment.

[0165] A protrusion 14T is formed on the surface 14A of the aluminum casting 14 on the side of the closed section member 12, which is inserted into the recess 12C.

[0166] The convex portion 14T and the concave portion 12C are complementary shapes. The convex portion 14T is embedded in the concave portion 12C.

[0167] The recess 12C is an example of the "first joint" of the present disclosure. The convex portion 14T is an example of the "second joint" of the present disclosure.

[0168] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B5 in the 11th embodiment is substantially the same as the manufacturing method of the assembly 10B4 in the 10th embodiment, therefore the different parts will be described.

[0169] The mold for the aluminum casting 14 is configured to form a protrusion 14T on the face 14A on the side of the closed section member 12 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0170] The closed section member 12 and the aluminum casting 14 are arranged such that the protrusion 14T formed on the side of the closed section member 12 of the aluminum casting 14 is inserted into the recess 12C provided on the first surface 12B1 of the closed section member 12.

[0171] (Moving body) The assembly 10B5 is installed on a moving body (e.g., a vehicle) in the same way as in the 10th embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0172] Thus, in the 11th embodiment, as in the 10th embodiment, a method for manufacturing a movable body is also provided.

[0173] (Effect) This embodiment achieves the same effect as the 10th embodiment.

[0174] [12th Implementation] (structure) The structure of the assembly 10B6 in the 12th embodiment is substantially the same as that of the assembly 10B1 in the 4th embodiment, therefore the different parts will be described.

[0175] Figure 10A This is a cross-sectional view of an example of the assembly 10B6 of the 12th embodiment.

[0176] No protrusion 14T is formed on the first surface 14B1 of the second joint 14B123, and no opening 12K for inserting the protrusion 14T is formed on the first surface 12B1 of the first joint 12B123.

[0177] In the 12th embodiment, the angle formed by the first surface 12B1 of the closed section member 12STAF of the assembly 10B6 is a right angle with the second surface 12B2 and the third surface 12B3 that intersect with the first surface 12B1.

[0178] The angles formed by the first surface 14B1 of the aluminum casting 14 and the second surface 12B2 and the third surface 12B3 that intersect with the first surface 14B1 are right angles.

[0179] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B6 in the 12th embodiment is substantially the same as the manufacturing method of the assembly 10B1 in the 4th embodiment, therefore the different parts will be described.

[0180] In the assembly 10B6 of the 12th embodiment, no protrusion 14T is formed on the first surface 14B1 of the second joint 14B123, and no opening 12K for inserting the protrusion 14T is formed on the first surface 12B1 of the first joint 12B123.

[0181] The closed section member 12STAF is manufactured in such a way that the angle formed by the first surface 12B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 12B1 is a right angle.

[0182] The mold for aluminum casting 14 is constructed such that the angles formed by the first surface 14B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 14B1 are right angles. The mold is used to manufacture aluminum casting 14.

[0183] (Moving body) The assembly 10B6 is installed on a moving body (e.g., a vehicle) in the same way as in the fourth embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment for use by passengers.

[0184] Thus, in the 12th embodiment, as in the 4th embodiment, a method for manufacturing a movable body is also provided.

[0185] (Effect) This embodiment achieves the same effect as the fourth embodiment.

[0186] [13th Implementation] (structure) The structure of the assembly 10B7 in the 13th embodiment is substantially the same as that of the assembly 10B0 in the 2nd embodiment, therefore the different parts will be described.

[0187] Figure 10B This is a cross-sectional view of an example of the assembly 10B7 of the 13th embodiment.

[0188] In the second embodiment, the first joint 12B123 of the closed-section member 12 of the assembly 10B0 has a protruding shape having a first surface 12B1, a second surface 12B2 and a third surface 12B3, and the second joint 14B123 of the aluminum casting 14 has a recessed shape having a first surface 14B1, a second surface 14B2 and a third surface 14B3.

[0189] In contrast, in the assembly 10B7 of this embodiment, the closed section member 12 and the aluminum casting 14 differ in that the closed section member 12 has a curved surface 12CC that is recessed toward the inside of the closed section member 12, while the aluminum casting 14 has a curved surface 14PPP that protrudes toward the outside (i.e., toward the closed section member 12).

[0190] Curved surface 12CC and curved surface 14PPP are complementary shapes that complement each other. Curved surface 14PPP is embedded in curved surface 12CC.

[0191] The curved surface 12CC is an example of the "first joint" of the present disclosure. The curved surface 14PPP is an example of the "second joint" of the present disclosure.

[0192] In addition, as in the fourth embodiment, flange receiving portions 14C1 and 14C2 are formed on the surface 14A of the closed section member 12 side of the aluminum casting 14 to accommodate the first overlapping flange portion 12F11 and the second overlapping flange portion 12F22.

[0193] (Manufacturing method of the assembly) The manufacturing method of the assembly 10B7 in the 13th embodiment is substantially the same as the manufacturing method of the assembly 10B0 in the 2nd embodiment, therefore the different parts will be described.

[0194] In the assembly 10B7 of the 13th embodiment, the mold for manufacturing the aluminum casting 14 is configured to form a curved surface 14PPP, and as in the 3rd embodiment, flange receiving portions 14C1 and 14C2 are formed on the surface 14A on the side of the closed section member 12 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0195] The closed section member 12STAF is formed in a manner that forms a curved surface 12CC.

[0196] (Moving body) The assembly 10B7 is installed on a moving body (e.g., a vehicle) in the same way as in the second embodiment. Specifically, the closed-section member 12 is mounted as the frame of the passenger compartment.

[0197] Thus, in the 13th embodiment, as in the 2nd embodiment, a method for manufacturing a mobile body is also provided.

[0198] (Effect) This embodiment achieves the same effect as the second embodiment.

[0199] [14th Implementation] (structure) Figure 11 This is a cross-sectional view of an example of the assembly 100A0 according to the 14th embodiment. The assembly 100A0 includes: a closed-section member 12STAF having a first joint portion 12STAF15; and an aluminum casting 14 having a second joint portion 14I. The closed-section member 12STAF and the aluminum casting 14 are joined by the first joint portion 12STAF15 and the second joint portion 14I.

[0200] The closed-section member 12STAF has a structure that is substantially the same as that of the closed-section member 12STAF in the fifth embodiment. However, the closed-section member 12STAF in the fifth embodiment has a hexagonal cross-section, while the closed-section member 12STAF in this embodiment has a quadrilateral cross-section.

[0201] The first joint 12STAF15 of the closed section member 12 and the second joint 14I of the aluminum casting 14 have complementary shapes that complement each other.

[0202] The first joint 12STAF15 of the closed section member 12STAF has the same structure as the portion 12STAF0 of the closed section member 12STAF except for the first joint 12STAF15.

[0203] The second joint 14I of the aluminum casting 14 is shaped so that the first joint 12STAF15 can be inserted. The first joint 12STAF15 of the closed section member 12STAF is embedded in the second joint 14I of the aluminum casting 14.

[0204] (Manufacturing method of the assembly) The manufacturing method of the assembly 100A0 in the 14th embodiment is substantially the same as the manufacturing method of the assembly 10B2 in the 5th embodiment, therefore the different parts will be described.

[0205] In this embodiment, the mold used to manufacture the aluminum casting 14 is configured to form a second joint 14I on the surface 14A on the side of the closed-section member 12 of the aluminum casting 14. The aluminum casting 14 is manufactured using this mold.

[0206] The closed section member 12STAF and the aluminum casting 14 are configured such that the first joint 12STAF15 of the closed section member 12STAF is embedded in the second joint 14I of the aluminum casting 14.

[0207] (Moving body) The assembly 100A0 is installed on a moving body (e.g., a vehicle) in the same way as in the fifth embodiment. Specifically, the closed-section member 12STAF is mounted as the frame of the passenger compartment for use by passengers.

[0208] Thus, in this embodiment, as in the fifth embodiment, a method for manufacturing a movable body is also provided.

[0209] (Effect) This embodiment achieves the same effect as the fifth embodiment.

[0210] [15th Implementation] (structure) Figure 12 This is a cross-sectional view of an example of the aluminum casting 14 of the assembly 100A1 of the 15th embodiment. Figure 13 This is a cross-sectional view of the assembly 100A1 according to the 15th embodiment. Figure 14A yes Figure 13 AA sectional view.

[0211] like Figures 12-14A As shown, the assembly 100A1 includes: a closed-section member 12STAF1122 having a first joint 12STAF22; and an aluminum casting 14 having a second joint 14PP. The closed-section member 12STAF1122 and the aluminum casting 14 are joined by the first joint 12STAF22 and the second joint 14PP.

[0212] The closed section member 12STAF1122 has a first joint portion 12STAF22 and a closed section portion 12STAF11.

[0213] The closed section portion 12STAF11 has a quadrilateral cross-section and a flange 12F3.

[0214] like Figure 12 As shown, a second joint 14PP is provided at the end of the aluminum casting 14. The second joint 14PP is formed by a first groove 14M1 and a second groove 14M2 provided on the first surface 14SH1 of the aluminum casting 14. The first groove 14M1 and the second groove 14M2 intersect (e.g., orthogonally) at one end, 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.

[0215] The shape of the second joint 14PP matches the shape of the internal space of the closed section member 12STAF1122. The second joint 14PP has a first end face 14P1 and a second end face 14P2 and a third end face 14P3 that intersect (e.g., orthogonal) with 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 surface of the second surface 14SH2 of the aluminum casting 14. The edges 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 edges of the three end faces 14P1 to 3.

[0216] like Figure 13 and Figure 14AAs shown, the closed-section member 12STAF1122 is a tubular component with a quadrilateral cross-section, as described above. The closed-section member 12STAF1122 has a first side portion 12STAF1, a fourth side portion 12STAF4 parallel to and opposite the first side portion 12STAF1, a second side portion 12STAF2, and a third side portion 12STAF3 connecting the two ends of the first side portion 12STAF1 and the two ends of the fourth side portion 12STAF4. The closed-section member 12STAF1122 is configured such that its cross-section is formed into a quadrilateral shape through each of the side portions 12STAF1 to 4. Furthermore, a flange 12F3 is provided axially on the third side portion 12STAF3.

[0217] At the front end of the closed-section member 12STAF1122 constructed as described above, an opening 12STAF5 is provided on the fourth side surface 12STAF4. The portion with the opening 12STAF5 is the first joint 12STAF22 in the closed-section member 12STAF1122, and it is fitted with the second joint 14PP. That is, the shapes formed by the first end face 14P1, the second end face 14P2, and the third end face 14P3 of the second joint 14PP and the shapes formed by the inner walls of the first side surface 12STAF1, the second side surface 12STAF2, and the third side surface 12STAF3 of the first joint 12STAF22 are complementary shapes. Therefore, the first side surface 12STAF1 is in contact with the first end face 14P1, the second side surface 12STAF2 is in contact with the second end face 14P2, and the third side surface 12STAF3 is in contact with the third end face 14P3. The first side portion 12STAF1 is joined to the first end face 14P1, the second side portion 12STAF2 is joined to the second end face 14P2, and the third side portion 12STAF3 is joined to the third end face 14P3. Thus, the first joint portion 12STAF22 of the closed section member 12STAF1122 is joined to the second joint portion 14PP of the aluminum casting 14.

[0218] With the first joint 12STAF22 and the second joint 14PP engaged, the flange 12F3 is located within the first groove 14M1, the front end face 12STAF6 of the closed section member 12STAF1122 abuts against the inner wall of the second groove 14M2, and the opening end edge 12STAF51 at the front end of the fourth side face 12STAF4 abuts against the third surface 14SH3. Thus, by providing portions on the front end face 12STAF6 and the opening end edge 12STAF51 that abut against the surface of the aluminum casting 14, the number of welding or bonding portions can be increased, thereby further improving the joint strength. In particular, the opening end edge 12STAF51 is formed at an angle relative to the axial direction of the opening end edge 12STAF51, thus increasing the engagement distance.

[0219] like Figure 14A As shown, when the first joint 12STAF22 and the second joint 14PP are engaged, the outer surface of the first side portion 12STAF1 is located in the same plane as the first surface 14SH1 of the aluminum casting 14 or in a position further inward than the first surface 14SH1, and does not protrude further than the aluminum casting 14, thus suppressing interference with components disposed around the aluminum casting 14. Similarly, a stepped portion 14L with 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 aluminum casting 14. Through this stepped portion 14L, the second side portion 12STAF2 in the engaged state is located in the same plane as the second surface 14SH2 of the aluminum casting 14 or in a position further inward than the second surface 14SH2.

[0220] (Manufacturing method of the assembly) Manufacture the closed section member 12STAF1122 and the aluminum casting 14. The manufacture of the closed section member 12 and the aluminum casting 14 can be carried out either first or both simultaneously.

[0221] The first joint portion 12STAF22 is fitted into the second joint portion 14PP. The first side surface portion 12STAF1 contacts the first end face 14P1, the second side surface portion 12STAF2 contacts the second end face 14P2, and the third side surface portion 12STAF3 contacts the third end face 14P3. Then, the first side surface portion 12STAF1 is joined to the first end face 14P1, the second side surface portion 12STAF2 to the second end face 14P2, and the third side surface portion 12STAF3 to the third end face 14P3, respectively. Thus, the first joint portion 12STAF22 of the closed section member 12STAF1122 is joined to the second joint portion 14PP of the aluminum casting 14.

[0222] (Moving body) The assembly 100A1 is installed on a moving body (e.g., a vehicle) in the same way as in the first embodiment. Specifically, a closed-section member 12STAF1122 is mounted as the frame of the passenger compartment for use by passengers.

[0223] Thus, in the 15th embodiment, as in the 1st embodiment, a method for manufacturing a movable body is also provided.

[0224] (Effect) This embodiment achieves the same effect as the first embodiment.

[0225] (A variation of the assembly of the 15th embodiment) Next, a modified example of the assembly 100A1 of the 15th embodiment will be described. The modified example of the assembly 100A1 of the 15th embodiment is substantially the same as the assembly 100A1 of the 15th embodiment, so only the different parts will be described.

[0226] Figure 14B This is a variation of the assembly 100A1 in the 15th embodiment. Figure 13 AA sectional view.

[0227] Assembly 100A1 in the 15th embodiment (see reference) Figure 14A In this example, the outer surface of the first side portion 12STAF1 does not protrude more than the first surface 14SH1 of the aluminum casting 14. In contrast, in this modified example (see reference...) Figure 14B The difference is that the outer surface of the first side face 12STAF1 is more prominent than the first surface 14SH1 of the aluminum casting 14.

[0228] Assembly 100A1 in the 15th embodiment (see reference) Figure 14A In this example, the first side face 12STAF1 contacts the first end face 14P1. In contrast, in this modified example (see reference...) Figure 14B The difference is that the first side face 12STAF1 is separated from the first end face 14P1.

[0229] This variation (reference) Figure 14B The aluminum casting 14 has a protrusion 14Q protruding into the groove 14M1. In the assembly 100A1 of the 15th embodiment (see reference...) Figure 14A In this example, flange 12F3 is located within the first groove 14M1. In contrast, in this modified example (see reference...) Figure 14B The difference lies in that the flange 12F3 engages with the protrusion 14Q that protrudes into the first groove 14M1.

[0230] Assembly 100A1 in the 15th embodiment (see reference) Figure 14A In this embodiment, the first side surface 12STAF1 is in surface contact with and engaged with the first end surface 14P1, the second side surface 12STAF2 is in surface contact with the second end surface 14P2, and the third side surface 12STAF3 is in surface contact with and engaged with the third end surface 14P3. In contrast, in this modified example (see reference...) Figure 14B The difference is that only the second side face 12STAF2 and the second end face 14P2, the flange 12F3 and the protrusion 14Q are in face contact and engaged, but the first side face 12STAF1 and the first end face 14P1, and the third side face 12STAF3 and the third end face 14P3 are not engaged.

[0231] Thus, in the assembly of this modified example, the second side surface 12STAF2 and the second end surface 14P2, and the flange 12F3 and the protrusion 14Q, respectively have complementary shapes. Furthermore, the assembly of this modified example is joined by two intersecting (e.g., orthogonal) surfaces. As described above, the two surfaces are the first surface between the second side surface 12STAF2 and the second end surface 14P2, and the second surface between the flange 12F3 and the protrusion 14Q.

[0232] [16th Implementation] (structure) Next, the structure of the assembly 100A2 of the 16th embodiment will be described. The structure of the assembly 100A2 of the 16th embodiment is substantially the same as that of the assembly 10B0 of the 2nd embodiment, so the different parts will be described.

[0233] Figure 15 This is an exploded cross-sectional view of an example of the assembly of the 16th embodiment.

[0234] In the first joint 12B123 of the closed section member 12, the angle formed by the first surface 12B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 12B1 is an acute angle.

[0235] In the second joint 14B123 of the aluminum casting 14, the angle formed by the first surface 14B1 and the second surface 12B2 and the third surface 12B3 that intersect with the first surface 14B1 is an acute angle.

[0236] (Manufacturing method of the assembly) The manufacturing method of the assembly 100A2 in the 16th embodiment is substantially the same as the manufacturing method of the assembly 10B0 in the 2nd embodiment, therefore the different parts will be described.

[0237] The mold used to manufacture the aluminum casting 14 is configured such that the angle formed by the first surface 14B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 14B1 is an acute angle. The aluminum casting 14 is manufactured using this mold.

[0238] The closed section member 12STAF is manufactured in such a way that the angle formed by the first surface 12B1 and the second surface 12B2 and the third surface 12B3 intersecting the first surface 12B1 is an acute angle.

[0239] (Moving body) The assembly 100A2 is installed on a moving body (e.g., a vehicle) in the same way as in the second embodiment. Specifically, a closed-section member 12STAF is mounted as the frame of the passenger compartment for use by passengers.

[0240] Thus, in the 16th embodiment, as in the 2nd embodiment, a method for manufacturing a movable body is also provided.

[0241] (Effect) This embodiment achieves the same effect as the second embodiment.

[0242] [Variation Example] In the above embodiments, cast parts such as iron, copper, and brass can be used instead of aluminum casting 14. Furthermore, the second joint can be manufactured by cutting a part from aluminum, iron, copper, or brass instead of aluminum casting 14.

[0243] The mobile body is not limited to vehicles; it can also be construction machinery or agricultural equipment. Examples of construction machinery include excavators. Examples of agricultural equipment include tractors or combine harvesters. The assembly is used for the respective cabs of the construction machinery and agricultural equipment. Furthermore, the mobile body can also be an aircraft, such as a balloon, airship, glider, airplane, or helicopter. Moreover, the mobile body can also be a flying object, such as a missile, space rocket, or spacecraft. Additionally, the mobile body can also be a ship, such as an oil tanker.

[0244] [Each assembly] The closed-section members 12 of the assemblies 10A0 to 10A4 and 10B0 to 10B7 in the first embodiment to the 16th embodiment and the above-described modifications are made of steel tubing.

[0245] Furthermore, component 14 is made of a different material than the closed-section members 12 of assemblies 10A0-10A4 and 10B0-10B7. Component 14 is an aluminum casting, but as in the modified example described above, it can also be a cast component made of iron, copper, brass, etc.

[0246] [Manufacturing method of the assembly] These closed-section members 12 are engaged with the component 14 as described above, specifically, they are fitted together. More specifically, the fitting is achieved by embedding the closed-section members 12 into the aluminum casting 14.

[0247] Furthermore, the closed section member 12 has flange portions (12F1, 12F2, 12F3), which are fitted into recesses (flange receiving portions 14C1, 14C2, 14C3) provided in the aluminum casting 14.

[0248] [Steel pipe] As described above, the closed section member is a steel tube (12STAF) made of a single steel pipe, which can be fitted with components made of a different material than the steel pipe.

[0249] (Postscript) Based on the first to the sixteenth embodiments and the above-described modifications, the following notes are provided.

[0250] (Note 1) An assembly comprising: Closed-section members, constructed of steel tubing; and The component is made of a different material than the closed-section member. The closed-section member is fitted into the component.

[0251] (Effect) In the prior art, closed-section members are joined to aluminum castings in a planar contact manner. However, compared to the prior art, the invention described in Appendix 1 enables a stronger bond between closed-section members and materials different from those of the closed-section members, for use in fitting closed-section members to components made of materials different from those of the closed-section members.

[0252] (Note 2) According to the assembly described in Appendix 1, wherein... The component is an aluminum casting.

[0253] (Effect) Aluminum has a lower density than iron, copper, and brass, so the invention described in Appendix 2 can achieve lighter weight than components made of iron and other materials.

[0254] (Note 3) According to the assembly described in Appendix 2, wherein... The closed-section member is fitted into the aluminum casting.

[0255] (Effect) Thus, by embedding the closed-section member into the aluminum casting, the invention described in Appendix 3 enables a stronger bond between the closed-section member and the aluminum casting than the prior art that uses planar contact.

[0256] (Note 4) According to the assembly described in Appendix 2 or Appendix 3, wherein... The closed-section member has a flange portion. The flange portion is fitted into a recess provided in the aluminum casting.

[0257] (Effect) Thus, the flange of the closed-section member is fitted into the recess provided in the aluminum casting, so the invention of Appendix 4 can easily position the closed-section member and the aluminum casting.

[0258] (Note 5) A type of steel pipe, which is made of steel pipe material. The steel pipe can be fitted with components made of a different material than the steel pipe.

[0259] (Effect) Thus, the steel pipe can be fitted with components made of a different material than the steel pipe, and therefore the invention of Appendix 5 enables the bonding strength between closed-section members and materials different from those of the closed-section members to be stronger than that of the prior art which is bonded in a planar contact manner.

[0260] (Note 6) A method for manufacturing an assembly, wherein the assembly is manufactured by fitting together a closed-section member made of steel tubing and a component made of a material different from the closed-section member.

[0261] (Effect) In the prior art, closed-section members are joined to aluminum castings in a planar contact manner. However, this embodiment enables a stronger bond between the closed-section member and the aluminum casting than in the prior art.

[0262] In the prior art, closed-section members are joined to aluminum castings in a planar contact manner. However, compared to the prior art, the invention in Appendix 6 can improve the bonding strength between closed-section members and materials different from those of the closed-section members, so that the closed-section members can be fitted into components made of materials different from those of the closed-section members.

Claims

1. An assembly comprising: Closed-section members, constructed of steel tubing; and The component is made of a different material than the closed-section member. The closed-section member is fitted into the component.

2. The assembly according to claim 1, wherein, The component is an aluminum casting.

3. The assembly according to claim 2, wherein, The fitting is achieved by embedding the closed-section member into the aluminum casting.

4. The assembly according to claim 2, wherein, The closed-section member has a flange portion. The flange portion is fitted into the recess provided in the aluminum casting.

5. A steel pipe, which is composed of steel pipe material, The steel pipe can be fitted with components made of a different material than the steel pipe.

6. A method for manufacturing an assembly, wherein the assembly is manufactured by fitting together a closed-section member made of steel tubing and a component made of a material different from the closed-section member.

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