Vehicle longitudinal beam

Abstract

The present invention relates to a vehicle longitudinal beam, which includes: a main member portion extending in the longitudinal direction of a vehicle; a front side mounting portion which is an integral structure with the front portion of the main member portion; a rear side mounting portion which is an integral structure with the rear portion of the main member portion; and a vibration damping device mounting portion which is an integral structure with the main member portion and in which the top end of a vibration damping device is accommodated and mounted.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0081141, filed on Jul. 1, 2020, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The invention relates to a vehicle longitudinal beam. Background Art

[0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0005] In recent years, as awareness of environmental crises and oil source depletion increases, the development of environmentally friendly electric vehicles such as electric vehicles (EVs) and hybrid electric vehicles (HEVs) has become increasingly prominent. Each of EVs and HEVs has one or more batteries installed on the bottom of the vehicle body, and thus, compared with internal combustion engine vehicles, it increases in weight due to such relatively heavy batteries.

[0006] For environmentally friendly electric vehicles, it is very important to reduce the weight of the vehicle to increase the all-electric range (AER). Therefore, lightweight materials such as aluminum and CFRP are applied to multiple components, multiple panels, etc. that constitute the vehicle body. Components with complex shapes according to their related parts and layouts can use aluminum materials, extruded materials, high vacuum die-casting materials, etc., which have about 1 / 3 the density of steel, to form the main frame structure of the vehicle body.

[0007] Since the rear longitudinal beam has a complex shape according to its related components and layout, it is difficult to manufacture by extrusion molding, but can be manufactured by high vacuum die casting. Since the rear longitudinal beam is manufactured by high vacuum die casting, the rear longitudinal beam has an open cross section. Since a plurality of reinforcing members and auxiliary members for forming a closed cross section are attached to the rear longitudinal beam by welding or the like, a relatively large number of parts are added, resulting in an increase in weight.

[0008] The above information described in this Background section is provided to help understanding the background of the present inventive concept and may contain any technical concept that is not considered to be the prior art already known by a person skilled in the art. Summary of the invention

[0009] The present invention is intended to solve the above-mentioned problems occurring in the prior art while completely maintaining the advantages achieved by the prior art.

[0010] One aspect of the present invention provides a vehicle side member which is designed to be an integral structure with related parts by low pressure casting (hollow casting) or the like, thereby reducing the number of parts to be assembled and the weight of the vehicle body.

[0011] According to one aspect of the present invention, a vehicle longitudinal beam may include: a main component portion extending in the longitudinal direction of the vehicle; a front mounting portion which is an integral structure with a front portion of the main component portion; a rear mounting portion which is an integral structure with a rear portion of the main component portion; and a vibration damping device mounting portion which is an integral structure with the main component portion, a top end of a vibration damping device being accommodated in and mounted to the vibration damping device mounting portion.

[0012] The main component part may include: a main top wall; a main bottom wall, which is opposite to the main top wall; a main vehicle inner side wall, which faces the interior of the vehicle; a main vehicle outer side wall, which faces the outside of the vehicle; and a main cavity, which is defined by the main top wall, the main bottom wall, the main vehicle inner side wall and the main vehicle outer side wall.

[0013] The front side mounting portion may extend from the front of the main member portion toward the front of the vehicle, and the front side mounting portion may be joined to the side rail.

[0014] The rear side mounting portion may extend from the rear of the main member portion toward the rear of the vehicle, and the rear side mounting portion may be joined to the rear longitudinal member.

[0015] The vibration damping device mounting portion may have a mounting cavity recessed from the main bottom wall toward the main top wall.

[0016] The vibration damping device mounting portion may include: a front mounting wall facing the front of the vehicle; a rear mounting wall facing the rear of the vehicle; an inner-vehicle mounting wall facing the interior of the vehicle; an outer-vehicle mounting wall facing the exterior of the vehicle; and a support surface located below the main top wall of the main component portion; and the mounting cavity may be defined by the front mounting wall, the rear mounting wall, the inner-vehicle mounting wall, the outer-vehicle mounting wall and the support surface.

[0017] The front mounting wall may be supported by a front reinforcing rib, and the front reinforcing rib may be integrally connected to the front mounting wall. The rear mounting wall may be supported by a rear reinforcing rib, and the rear reinforcing rib may be integrally connected to the rear mounting wall. The vehicle interior mounting wall may be supported by a vehicle interior reinforcing rib, and the vehicle interior reinforcing rib may be integrally connected to the vehicle interior mounting wall. The vehicle exterior mounting wall may be supported by a vehicle exterior reinforcing rib, and the vehicle exterior reinforcing rib may be integrally connected to the vehicle exterior mounting wall.

[0018] The vehicle longitudinal beam may further include an annular closed wall structure surrounding the vibration damping device mounting portion.

[0019] The vehicle longitudinal beam may further include a reinforcement chamber defined between the annular closed wall structure and the vibration damping device mounting portion.

[0020] The vehicle longitudinal beam may further include a plurality of side mounting portions protruding from the main vehicle-inboard side wall of the main member portion toward the interior of the vehicle, and each side mounting portion may be joined to each end portion of the cross beam mounted on the floor.

[0021] The vehicle longitudinal beam may further include: a front hardware mounting component, which is mounted with a front mounting portion of the subframe and is integrally mounted on the main bottom wall of the main component portion; and a rear hardware mounting component, which is mounted with a rear mounting portion of the subframe and is integrally mounted on the main bottom wall of the main component portion.

[0022] The main bottom wall may have a first mounting surface on which the front hardware mounting component is mounted and a second mounting surface on which the rear hardware mounting component is mounted, and the first mounting surface and the second mounting surface may be flat.

[0023] The front mounting portion, the rear mounting portion, the vibration damping device mounting portion and the main component portion may be made of aluminum material.

[0024] Further areas of applicability will become apparent from the description provided herein.It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order that the present invention may be better understood, reference will now be made to the accompanying drawings in which its various forms are described by way of example only, in which:

[0026] Figure 1 A top perspective view of a vehicle longitudinal beam according to an exemplary form of the present invention;

[0027] Figure 2 is a bottom perspective view of a vehicle longitudinal beam according to an exemplary form of the present invention;

[0028] Figure 3 Shown from Figure 1 The plane view observed in the direction indicated by arrow A;

[0029] Figure 4 Shown along Figure 3 A cross-sectional view obtained along line EE;

[0030] Figure 5 Shown along Figure 3 A cross-sectional view obtained along line FF;

[0031] Figure 6 Shown along Figure 3A cross-sectional view obtained by line GG;

[0032] Figure 7 Shown from Figure 1 A side view observed in the direction indicated by arrow B;

[0033] Figure 8 Shown along Figure 7 A cross-sectional view obtained by line HH;

[0034] Fig. 9 Shown from Figure 1 A bottom view observed in the direction indicated by arrow C;

[0035] Fig.10 Shown from Figure 1 A rear view observed in the direction indicated by arrow D;

[0036] Fig.11 A top perspective view showing a vehicle longitudinal beam according to an exemplary form of the present invention, the vehicle longitudinal beam being mounted on the rear floor of a vehicle;

[0037] Fig.12 A bottom perspective view of a vehicle rail according to an exemplary form of the invention is shown, the vehicle rail being mounted on the rear floor of a vehicle.

[0038] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

[0039] Description of reference numerals:

[0040] 10: Vehicle longitudinal beam 11: Main component part

[0041] 12: Front mounting part 13: Rear mounting part

[0042] 14: Vibration damping device mounting portion 15: First side mounting portion

[0043] 16: Second side mounting part 17: Front hardware mounting part

[0044] 18: Rear hardware installation parts 21: Main top wall

[0045] 22: Main bottom wall 23: Main vehicle inner side wall

[0046] 24: Main vehicle outer side wall 25a: First outer flange

[0047] 25b: Second outer flange 26: Inner flange

[0048] 31: front top wall 31a: top flange

[0049] 32: front bottom wall 32a: bottom flange

[0050] 33: Front inner side wall 34: Opening cavity

[0051] 35: Rear top wall 36: Rear bottom wall

[0052] 37: rear vehicle inner side wall 38: rear vehicle outer side wall

[0053] 41: Front mounting wall 42: Rear mounting wall

[0054] 43: Inner side mounting wall 44: Outer side mounting wall

[0055] 51: first bottom wall 52: first front wall

[0056] 53: First rear wall 54: First closed wall

[0057] 55: first side cavity 61: second bottom wall

[0058] 62: Second front wall 63: Second rear wall

[0059] 64: Second closed wall 65: Second side cavity. DETAILED DESCRIPTION

[0060] The following description is merely exemplary in nature and is not intended to limit the invention, its application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate similar or corresponding parts and features.

[0061] Hereinafter, exemplary forms of the present invention will be described in detail with reference to the accompanying drawings. In addition, detailed descriptions of well-known technologies related to the present invention will be omitted so as not to unnecessarily obscure the gist of the present invention.

[0062] Terms such as first, second, A, B, (a) and (b) can be used to describe elements in the exemplary form of the present invention. These terms are only used to distinguish one element from another element, and the intrinsic characteristics, order or sequence of the corresponding elements, etc. are not limited by these terms. Unless otherwise defined, all terms used herein (including technical terms or scientific and technological terms) have the same meanings as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. These terms as defined in commonly used dictionaries should be interpreted as having the meaning equivalent to the contextual meaning in the relevant technical field, and should not be interpreted as having idealized or overly formalized meanings, unless clearly defined as having such meanings in this application.

[0063] refer to Figure 1 and Figure 2A vehicle longitudinal beam 10 according to an exemplary form of the present invention may include: a main member portion 11 extending in the longitudinal direction of the vehicle; a front mounting portion 12 which is an integral structure with a front portion of the main member portion 11; a rear mounting portion 13 which is an integral structure with a rear portion of the main member portion 11; and a vibration damping device mounting portion 14 which is an integral structure with the main member portion 11.

[0064] The vehicle side member 10 according to the exemplary form of the present invention can be made of aluminum or aluminum alloy, and the front side mounting portion 12, the rear side mounting portion 13 and the vibration damping device mounting portion 14 can be integrally connected to the main member portion 11 by low pressure casting (hollow casting). That is, since the vehicle side member 10 is manufactured by low pressure casting or the like, the main member portion 11, the front side mounting portion 12, the rear side mounting portion 13, the vibration damping device mounting portion 14 and the plurality of side mounting portions 15, 16 can form an integral integral structure. Compared with the prior art, by reducing the number of components of the side member 10, the weight and manufacturing cost of the vehicle can be reduced.

[0065] The main member portion 11 may include: a main top wall 21; a main bottom wall 22, which is opposite to the main top wall 21; a main inboard side wall 23, which faces the interior of the vehicle; and a main outboard side wall 24, which faces the exterior of the vehicle.

[0066] refer to Figure 1 and Figure 2 The main top wall 21 may face the top of the vehicle, and the main top wall 21 may extend in the longitudinal direction of the vehicle. The main top wall 21 may have outer side flanges 25a and 25b extending along its outer side edges. Fig.11 , the outer flanges 25a and 25b may be joined to the wheel cover 7 by welding using fasteners or the like. The outer flanges 25a and 25b may include: a first outer flange 25a joined to the front surface of the wheel cover 7; and a second outer flange 25b joined to the side wall of the wheel cover 7. The first outer flange 25a may extend in the width direction of the main component part 11, and the second outer flange 25b may extend in the longitudinal direction of the main component part 11, so that the first outer flange 25a may be perpendicular to the second outer flange 25b. The main component part 11 may be joined to the wheel cover 7 by the first outer flange 25a and the second outer flange 25b, and the mounting bracket 8 may be joined to the wheel cover 7 and the main component part 11.

[0067] refer to Figure 2, the main bottom wall 22 may face the bottom (or ground) of the vehicle, and the main bottom wall 22 may extend in the longitudinal direction of the vehicle. The front hardware mounting component 17 and the rear hardware mounting component 18 may be integrally mounted on the main bottom wall 22. The front hardware mounting component 17 may be relatively close to the front side mounting portion 12, and the rear hardware mounting component 18 may be relatively close to the rear side mounting portion 13. Therefore, the front hardware mounting component 17 may be relatively close to the front of the vehicle, and the rear hardware mounting component 18 may be relatively close to the rear of the vehicle. The front mounting portion of the subframe (not shown) may be mounted to the front hardware mounting component 17 by a front elastic bushing, and the rear mounting portion of the subframe may be mounted to the rear hardware mounting component 18 by a rear elastic bushing. For example, the front hardware mounting component 17 may be a pipe nut extending vertically from the main bottom wall 22, and the rear hardware mounting component 18 may be a mounting stud or mounting rod extending vertically from the main bottom wall 22.

[0068] refer to Fig. 9 , the main bottom wall 22 may have a first mounting surface 22a provided with a front hardware mounting component 17 and a second mounting surface 22b provided with a rear hardware mounting component 18. The first mounting surface 22a may be located in front of the second mounting surface 22b. Considering the contact with the front elastic bushing and the rear elastic bushing, the first mounting surface 22a and the second mounting surface 22b may be flat. According to an exemplary form of the present invention, since the hardware mounting components 17 and 18 for mounting the subframe are an integral structure with the main bottom wall 22 of the main component portion 11, a separate bracket may not be required for the assembly of the hardware mounting components 17 and 18, thereby reducing the manufacturing cost and weight.

[0069] refer to Figure 1 and Figure 4 The main vehicle inner side wall 23 may face the interior of the vehicle, and the main vehicle inner side wall 23 may extend in the longitudinal direction of the vehicle. The main vehicle inner side wall 23 may have a vehicle inner flange 26 extending in the longitudinal direction of the main component part 11. The vehicle inner flange 26 may extend along the edge of the bottom plate 2. Fig.11 and Fig.12 As shown in FIG. 1 , the vehicle interior flange 26 may be joined to the edge of the floor panel 2 using fasteners or the like and by welding.

[0070] refer to Figure 2 The main vehicle outer side wall 24 may face the outside of the vehicle, and the main vehicle outer side wall 24 may extend in the longitudinal direction of the vehicle.

[0071] refer to Figure 4, the main component part 11 may include a main cavity 28 defined by a main top wall 21, a main bottom wall 22, a main vehicle inner side wall 23, and a main vehicle outer side wall 24, so the main component part 11 may have a closed cross-section defined by the main top wall 21, the main bottom wall 22, the main vehicle inner side wall 23, and the main vehicle outer side wall 24. In particular, since the main top wall 21, the main bottom wall 22, the main vehicle inner side wall 23, and the main vehicle outer side wall 24 are continuously formed in the longitudinal direction of the vehicle, the closed cross-section of the main component part 11 may be continuous along the longitudinal direction of the main component part 11. According to an exemplary form of the present invention, since the closed cross-section of the main component part 11 is continuous along the longitudinal direction of the main component part 11, the rigidity and strength of the main component part 11 may be significantly improved without the need for additional reinforcing members.

[0072] refer to Figure 1 and Figure 2 The front mounting portion 12 may extend from the front of the main member portion 11 toward the front of the vehicle. In particular, the front mounting portion 12 may extend in the longitudinal direction of the vehicle.

[0073] refer to Fig.11 and Fig.12 , the front side mounting portion 12 may be joined to the side sill 9 by welding or the like. The front side mounting portion 12 may include: a front top wall 31 facing the top of the vehicle; a front bottom wall 32 opposite to the front top wall 31; a front vehicle inner side wall 33 facing the interior of the vehicle; a top flange 31a extending along the edge of the front top wall 31; and a bottom flange 32a extending along the edge of the front bottom wall 32. The front side mounting portion 12 may be open to the outside of the vehicle. The front side mounting portion 12 may have an open cavity 34 defined by the front top wall 31, the front bottom wall 32, and the front vehicle inner side wall 33, and the open cavity 34 of the front side mounting portion 12 may accommodate the end of the side sill 9. The front top wall 31 of the front side mounting portion 12 may be continuous from the main top wall 21 of the main member portion 11 in the longitudinal direction of the vehicle, and the front bottom wall 32 of the front side mounting portion 12 may be continuous from the main bottom wall 22 of the main member portion 11 in the longitudinal direction of the vehicle. The front vehicle inner side wall 33 of the front side mounting portion 12 may be continuous from the main vehicle inner side wall 23 of the main member portion 11 in the longitudinal direction of the vehicle.

[0074] refer to Figure 1 and Figure 2 , the rear side mounting portion 13 may extend from the rear of the main member portion 11 toward the rear of the vehicle. In particular, the rear side mounting portion 13 may extend in the longitudinal direction of the vehicle. Fig.11 and Fig.12, the rear side mounting portion 13 may be joined to the rear longitudinal member 6 by welding or the like. The rear side mounting portion 13 may include: a rear top wall 35 facing the top of the vehicle; a rear bottom wall 36 opposite to the rear top wall 35; a rear vehicle inner side wall 37 facing the inside of the vehicle; and a rear vehicle outer side wall 38 facing the outside of the vehicle. The rear side mounting portion 13 may have a cavity 39 defined by the rear top wall 35, the rear bottom wall 36, the rear vehicle inner side wall 37, and the rear vehicle outer side wall 38, and the cavity 39 of the rear side mounting portion 13 may accommodate the end of the rear longitudinal member 6. The rear top wall 35 of the rear side mounting portion 13 may be continuous from the main top wall 21 of the main member portion 11 in the longitudinal direction of the vehicle, and the rear bottom wall 36 of the rear side mounting portion 13 may be continuous from the main bottom wall 22 of the main member portion 11 in the longitudinal direction of the vehicle. The rear vehicle inner side wall 37 of the rear side mounting portion 13 may be continuous along the longitudinal direction of the vehicle from the main vehicle inner side wall 23 of the main component portion 11, and the rear vehicle outer side wall 38 of the rear side mounting portion 13 may be continuous along the longitudinal direction of the vehicle from the main vehicle outer side wall 24 of the main component portion 11.

[0075] The vibration reduction device mounting portion 14 may be an integral structure with the main component portion 11 to accommodate the top end of the vibration reduction device (eg, vibration absorber) 5. That is, the vibration reduction device mounting portion 14 may be a vibration reduction device housing formed integrally with the main component portion 11. Figure 2 The vibration damper mounting portion 14 may be disposed on a portion of the main member portion 11 adjacent to the main vehicle outer side wall 24 and the rear mounting portion 13. The vibration damper mounting portion 14 may be recessed from the main bottom wall 22 toward the main top wall 21.

[0076] refer to Figure 2 , Figure 5 , Figure 6 and Fig. 9 , the main component part 11 may further include a recessed bottom wall 27, which is recessed from the main bottom wall 22 toward the main top wall 21. The recessed bottom wall 27 may be adjacent to the main vehicle outer side wall 24 and the rear side mounting part 13, and the vibration damping device mounting part 14 may be located in the recessed bottom wall 27. The vibration damping device mounting part 14 may be recessed from the recessed bottom wall 27 of the main component part 11 toward the main top wall 21 of the main component part 11. The vibration damping device mounting part 14 may have a mounting cavity 46, and the top end of the vibration damping device 5 is accommodated and mounted to the mounting cavity 46.

[0077] refer to Figure 2, the vibration damping device mounting portion 14 may include: a front mounting wall 41 facing the front of the vehicle; a rear mounting wall 42 facing the rear of the vehicle; an inboard mounting wall 43 facing the interior of the vehicle; an outboard mounting wall 44 facing the exterior of the vehicle; and a support surface 45 located below the main top wall 21 of the main component portion 11. The vibration damping device mounting portion 14 may include a mounting cavity 46 defined by the front mounting wall 41, the rear mounting wall 42, the inboard mounting wall 43, the outboard mounting wall 44, and the support surface 45. In particular, the mounting cavity 46 may be recessed from the recessed bottom wall 27 of the main component portion 11 toward the main top wall 21 of the main component portion 11. When the top end of the vibration damping device (e.g., vibration absorbing device) 5 is accommodated in the mounting cavity 46, the top end of the vibration damping device 5 may be supported by the vibration damping device mounting portion 14, and the support surface 45 may be flat to support the top end surface of the vibration damping device 5.

[0078] refer to Figure 1 and Figure 6 The main top wall 21 may have a top end portion 21a protruding upward, and the top end portion 21a may be disposed at a position corresponding to the position of the vibration damping device mounting portion 14. The top end portion 21a may be flat, and a support surface 45 of the vibration damping device mounting portion 14 may be located below the top end portion 21a.

[0079] refer to Figure 6 , the front side mounting wall 41 may be supported by the front side reinforcing rib, and the front side reinforcing rib 41a may be integrally connected between the front side mounting wall 41 and the recessed bottom wall 27. The front side reinforcing rib 41a may extend in a direction perpendicular to the front side mounting wall 41. The rear side mounting wall 42 may be supported by the rear side reinforcing rib 42a, and the rear side reinforcing rib 42a may be integrally connected between the rear side mounting wall 42 and the recessed bottom wall 27. The rear side reinforcing rib 42a may extend in a direction perpendicular to the rear side mounting wall 42. Therefore, the rigidity of the vibration damping device mounting portion 14 in the longitudinal direction may be increased by the front side mounting wall 41, the rear side mounting wall 42, the front side reinforcing rib 41a, and the rear side reinforcing rib 42a.

[0080] refer to Figure 5, the inboard mounting wall 43 may be spaced apart from the main inboard side wall 23, and the inboard closed cross section may be defined by the inboard mounting wall 43, the top end portion 21a of the main top wall 21, the main inboard side wall 23, and the main bottom wall 22. The inboard closed cross section may face the interior of the vehicle. The inboard mounting wall 43 may be supported by a plurality of inboard reinforcement ribs 43a and 43b, and the plurality of inboard reinforcement ribs 43a and 43b may be integrally connected to the inboard mounting wall 43. Each of the inboard reinforcement ribs 43a and 43b may extend in a direction parallel to the inboard mounting wall 43, and each of the inboard reinforcement ribs 43a and 43b may protrude from the inboard mounting wall 43 toward the main inboard side wall 23. For example, the vertical length (height) of the vehicle interior mounting wall 43 may be greater than the lengths of the front side mounting wall 41, the rear side mounting wall 42, and the vehicle exterior mounting wall 44, and the vehicle interior mounting wall 43 may be supported by a plurality of vehicle interior reinforcing ribs 43a and 43b. For example, the first vehicle interior reinforcing rib 43a may be integrally connected to the upper portion of the vehicle interior mounting wall 43 and the top end portion 21a of the main top wall 21 to support the upper portion of the vehicle interior mounting wall 43, and the second vehicle interior reinforcing rib 43b may be integrally connected to the lower portion of the vehicle interior mounting wall 43, the main bottom wall 22, and the main vehicle interior side wall 23 to support the lower portion of the vehicle interior mounting wall 43.

[0081] refer to Figure 5 , the vehicle outer side mounting wall 44 can be spaced apart from the main vehicle outer side wall 24, and the outer closed cross section can be defined by the vehicle outer side mounting wall 44, the main vehicle outer side wall 24, the top end portion 21a of the main top wall 21, and the recessed bottom wall 27. The outer closed cross section can face the outside of the vehicle. The vehicle outer side mounting wall 44 can be supported by the vehicle outer side reinforcing rib 44a, and the vehicle outer side reinforcing rib 44a can be integrally connected to the vehicle outer side mounting wall 44. The vehicle outer side reinforcing rib 44a can extend in a vertical length (height) direction parallel to the vehicle outer side mounting wall 44, and the vehicle outer side reinforcing rib 44a can protrude from the vehicle outer side mounting wall 44 toward the main vehicle outer side wall 24. Therefore, the lateral rigidity of the vibration damping device mounting portion 14 in the width direction can be increased by the vehicle inner side mounting wall 43, the vehicle outer side mounting wall 44, the plurality of vehicle inner side reinforcing ribs 43a and 43b, and the vehicle outer side reinforcing rib 44a.

[0082] refer to Figure 5 Because the vertical length (height) of the vehicle inner side mounting wall 43 is greater than the length of the vehicle outer side mounting wall 44, and the vertical length (height) of the main vehicle inner side wall 23 is greater than the length of the main vehicle outer side wall 24, the size of the closed cross-section on the vehicle inner side can be greater than the size of the closed cross-section on the vehicle outer side, so that the top end of the shock absorber 5 can be firmly supported by the closed cross-section on the vehicle inner side.

[0083] refer to Figure 8The vehicle longitudinal beam 10 according to an exemplary form of the present invention may further include: a first reinforcing wall 47 extending from a front end of the vehicle inner side mounting wall 43 of the vibration damping device mounting portion 14 toward the front of the vehicle within the main cavity 28 of the main component portion 11; and a second reinforcing wall 48 extending from a rear end of the vehicle inner side mounting wall 43 of the vibration damping device mounting portion 14 toward the rear of the vehicle within the main cavity 28 of the main component portion 11.

[0084] The rear end of the first reinforcing wall 47 may be connected to the front end of the inboard mounting wall 43, and the front end of the first reinforcing wall 47 may be connected to the main outboard side wall 24 of the main component portion 11. The front end of the second reinforcing wall 48 may be connected to the rear end of the inboard mounting wall 43, and the rear end of the second reinforcing wall 48 may be connected to the main outboard side wall 24 of the main component portion 11. Therefore, the first reinforcing wall 47, the inboard mounting wall 43, the second reinforcing wall 48, and a portion of the main outboard side wall 24 of the main component portion 11 may form a closed wall structure 70 that continuously surrounds the front mounting wall 41, the rear mounting wall 42, the inboard mounting wall 43, and the outboard mounting wall 44 of the vibration damping device mounting portion 14. That is, the closed wall structure 70 may include the first reinforcing wall 47, the second reinforcing wall 48, and a portion of the main outboard side wall 24. In particular, when the closed wall structure 70 is spaced apart from at least some of the mounting walls of the vibration damping device mounting portion 14, a reinforcement cavity 76 may be defined between the closed wall structure 70 and the vibration damping device mounting portion 14. In particular, the reinforcement cavity 76 may be separated from the main cavity 28 of the main member portion 11 by the first reinforcement wall 47 and the second reinforcement wall 48. Since the closed wall structure is provided around the vibration damping device mounting portion 14, the rigidity of the vibration damping device mounting portion 14 and the mounting rigidity of the vibration damping device 5 may be increased. In particular, since the closed wall structure 70 has an annular shape such as an oval or elliptical shape, the load applied to the vibration damping device 5 may be uniformly distributed to the closed wall structure 70 and the longitudinal beam 10, and the rigidity of the vibration damping device mounting portion 14 may be further increased.

[0085] The vehicle side member 10 according to the exemplary form of the present invention may further include a plurality of side mounting portions 15 and 16 protruding from the main vehicle inner side wall 23 of the main member portion 11 toward the interior of the vehicle. Fig.11 and Fig.12 , the side mounting portions 15 and 16 may be respectively joined to the ends of the cross beams 3 and 4 mounted on the base plate 2 .

[0086] In another form, the first cross beam 3 and the second cross beam 4 may be mounted on the floor panel 2, and the first cross beam 3 and the second cross beam 4 may extend in the width direction of the floor panel 2. The first cross beam 3 and the second cross beam 4 may be spaced apart from each other in the longitudinal direction of the vehicle, and the first cross beam 3 may be located in front of the second cross beam 4. The plurality of side mounting portions 15 and 16 may include: a first side mounting portion 15 to which an end portion of the first cross beam 3 is joined; and a second side mounting portion 16 to which an end portion of the second cross beam 4 is joined.

[0087] refer to Figure 1 , Figure 7 and Fig. 9 The first side mounting portion 15 may include: a first bottom wall 51 extending horizontally from the main bottom wall 22 of the main component portion 11; a first front wall 52 facing the front of the vehicle; a first rear wall 53 facing the rear of the vehicle; and a first closed wall 54 adjacent to the main inboard side wall 23 of the main component portion 11. The first bottom wall 51 may extend horizontally from the main bottom wall 22 of the main component portion 11. Fig. 9 , the first bottom wall 51 may be aligned with the first mounting surface 22a of the main bottom wall 22. The first front wall 52 may extend upward from the front end of the first bottom wall 51, and the first rear wall 53 may extend upward from the rear end of the first bottom wall 51. The first closed wall 54 may have a flat surface perpendicular to the first bottom wall 51, the first front wall 52, and the first rear wall 53. The first side mounting portion 15 may include a first side cavity 55 defined by the first bottom wall 51, the first front wall 52, the first rear wall 53, and the first closed wall 54. Fig.11 and Fig.12 The end of the first cross beam 3 can be accommodated in the first side cavity 55 of the first side mounting portion 15 and joined thereto by welding or the like.

[0088] refer to Figure 1 , Figure 7 and Fig. 9 The second side mounting portion 16 may include: a second bottom wall 61 extending horizontally from the main bottom wall 22 of the main component portion 11; a second front wall 62 facing the front of the vehicle; a second rear wall 63 facing the rear of the vehicle; and a second closed wall 64 adjacent to the main inboard side wall 23 of the main component portion 11. The second bottom wall 61 may extend horizontally from the main bottom wall 22 of the main component portion 11. Fig. 9, the second bottom wall 61 may be aligned with the second mounting surface 22b of the main bottom wall 22. The second front wall 62 may extend upward from the front end of the second bottom wall 61, and the second rear wall 63 may extend upward from the rear end of the second bottom wall 61. The second closed wall 64 may have a flat surface perpendicular to the second bottom wall 61, the second front wall 62, and the second rear wall 63. The second side mounting portion 16 may include a second side cavity 65 defined by the second bottom wall 61, the second front wall 62, the second rear wall 63, and the second closed wall 64. Fig.11 and Fig.12 The end of the second cross beam 4 can be accommodated in the second side cavity 65 of the second side mounting portion 16 and joined thereto by welding or the like.

[0089] According to an exemplary form, as in Fig.11 and Fig.12 As shown in FIG. 1 , the vehicle longitudinal beam 10 may be a rear longitudinal beam provided at the rear of the vehicle.

[0090] In one form, the floor 2 may be a rear floor disposed at the rear of the vehicle, and the rear longitudinal member 6 may be a reinforcing member disposed at the rearmost portion of the vehicle. The first cross member 3 and the second cross member 4 may be mounted on the floor 2, and the front mounting portion 12 of the longitudinal member 10 may be joined to the rear end of the side member 9.

[0091] The outer flanges 25a and 25b of the side member 10 may be joined to the wheel housing 7 of the vehicle body using fasteners or the like and by welding. The outer flanges 25a and 25b may include: a first outer flange 25a joined to the front surface of the wheel housing 7; and a second outer flange 25b joined to the side wall of the wheel housing 7.

[0092] As described above, according to an exemplary form of the present invention, the front side mounting portion 12, the rear side mounting portion 13 and the vibration damping device mounting portion 14 can be made into an integral structure with the main component portion 11 by low pressure casting (hollow casting) or the like, which can reduce the number of components as well as the weight and manufacturing cost of the vehicle body.

[0093] According to an exemplary form of the present invention, since the annular closed wall structure is provided to surround the vibration damping device mounting portion 14, the rigidity of the vibration damping device mounting portion 14 and the mounting rigidity and / or supporting rigidity of the vibration damping device 5 can be increased, and the load applied to the vibration damping device 5 can be uniformly distributed through the closed wall structure and the longitudinal beam.

[0094] According to an exemplary form of the present invention, the main member portion 11, the front mounting portion 12, the rear mounting portion 13, the vibration damping device mounting portion 14 and the plurality of side mounting portions 15, 16 can form an integral structure. Therefore, the welded joints can be significantly reduced, and the rigidity and crash resistance at the mounting point can be improved.

[0095] Hereinabove, although the present invention has been described with reference to exemplary forms and drawings, the present invention is not limited thereto but various modifications and changes may be made by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention.

Claims

1. A vehicle longitudinal beam, comprising: a main member portion configured to extend in the longitudinal direction of the vehicle; A front mounting portion, which is an integral structure with the front portion of the main component portion; A rear mounting portion, which is an integral structure with the rear portion of the main component portion; as well as A vibration damping device mounting portion, which is an integral structure with the main component portion, and the top end of the vibration damping device is accommodated in and mounted to the vibration damping device mounting portion; Wherein, the main component part includes: main top wall; a main bottom wall, which is opposite to the main top wall; a main inboard sidewall, which faces the interior of the vehicle; The main outboard sidewall, which faces the exterior of the vehicle; and a main cavity defined by the main top wall, the main bottom wall, the main vehicle inner side wall, and the main vehicle outer side wall; The vibration reduction device installation portion has an installation cavity recessed from the main bottom wall toward the main top wall, The top end of the vibration reduction device is accommodated in and mounted in the mounting cavity.

2. The vehicle longitudinal beam according to claim 1, wherein: The vibration reduction device installation part comprises: a front mounting wall facing the front of the vehicle; a rear mounting wall facing the rear of the vehicle; an inboard mounting wall facing the interior of the vehicle; an outboard mounting wall facing the exterior of the vehicle; and a support surface located below the main top wall of the main component portion; The mounting cavity is defined by the front mounting wall, the rear mounting wall, the vehicle interior mounting wall, the vehicle exterior mounting wall, and the support surface.

3. The vehicle longitudinal beam according to claim 2, wherein: The front mounting wall is supported by the front reinforcing ribs, The front reinforcing rib is integrally connected to the front mounting wall, The rear side mounting wall is supported by the rear side reinforcing ribs, The rear reinforcing rib is integrally connected to the rear mounting wall, The vehicle interior mounting wall is supported by the vehicle interior reinforcement ribs, The vehicle interior reinforcement rib is integrally connected to the vehicle interior mounting wall, The vehicle outer side mounting wall is supported by the vehicle outer side reinforcing rib, The vehicle exterior side reinforcement rib is integrally connected to the vehicle exterior side mounting wall.

4. The vehicle side member according to claim 1, further comprising an annular closed wall structure surrounding the vibration damping device mounting portion. 5 . The vehicle side member according to claim 4 , further comprising a reinforcement cavity defined between the annular closed wall structure and the vibration damping device mounting portion.

6. The vehicle longitudinal beam according to claim 1, wherein: The front mounting portion is configured to extend from a front portion of the main member portion toward a front portion of the vehicle, and The front mounting portion is joined to the side rail.

7. The vehicle longitudinal beam according to claim 1, wherein: The rear side mounting portion is configured to extend from a rear portion of the main member portion toward a rear portion of the vehicle, and The rear mounting portion is joined to the rear longitudinal member.

8. The vehicle longitudinal beam of claim 1, further comprising: a plurality of side mounting portions configured to project from the main vehicle interior side wall of the main member portion toward the interior of the vehicle, Wherein, each of the plurality of side mounting portions is coupled to each end of a cross beam mounted on the base plate.

9. The vehicle longitudinal beam of claim 1, further comprising: a front hardware mounting component to which the front mounting portion of the subframe is mounted, the front hardware mounting component being integrally mounted on the main bottom wall of the main member portion; and A rear hardware mounting component is mounted with a rear mounting portion of the sub-frame, and the rear hardware mounting component is integrally mounted on the main bottom wall of the main component portion.

10. The vehicle longitudinal beam according to claim 9, wherein: The main bottom wall has a first mounting surface to which the front hardware mounting component is mounted and a second mounting surface to which the rear hardware mounting component is mounted, The first mounting surface and the second mounting surface are planar.

11. The vehicle longitudinal beam according to claim 1, wherein: The front side mounting portion, the rear side mounting portion, the vibration damping device mounting portion and the main component portion are made of aluminum material.

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