Subframe mounting assembly for a vehicle body

Abstract

The present invention relates to a subframe mounting assembly structure of a vehicle body, which includes a fender side member mounted at a rear end portion of a front side member in a longitudinal direction of the vehicle body, a first side extension member arranged in a lateral direction of the vehicle body and connected to an inner side of the fender side member, a second side extension member arranged in the lateral direction of the vehicle body and connected to an outer side of the fender side member, a tunnel member arranged in the lateral direction, the tunnel member connecting the first side extension members on both sides thereof to each other at a central portion of the vehicle body, and the tunnel member having the same phase as the first side extension members, and a cap-type bracket arranged to cover the fender side member at a portion where the fender side member is connected to the first side extension member and the second side extension member.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0019478, filed on February 10, 2021, the entire contents of which are incorporated herein for all purposes by this reference. TECHNICAL FIELD

[0003] The present application relates to a subframe mounting assembly structure of a vehicle body. More specifically, the present application relates to a subframe mounting assembly structure of a vehicle body, which can achieve a flat floor structure by applying a "hat" type subframe mounting structure. BACKGROUND

[0004] Generally, for a vehicle body of a sedan or an RV (Recreational Vehicle), there is a cross member in the interior space, and a center tunnel is manufactured to be high. However, a small commercial MPV (Multi-Purpose Vehicle) model includes a van and a minivan, and the ability to carry people and load cargo is very important to the characteristics of the vehicle type, so it is necessary to make the floor of the vehicle body flat.

[0005] In order to achieve such a flat floor, the rear end portion of the front side member (front subframe) and the contour of the center floor of the vehicle body are raised, and accordingly, the vehicle body mounting corresponding height of the rear mounting portion of the front subframe is increased.

[0006] When the height of the rear mounting portion of the front subframe is increased, the mounting portion is easily subjected to loads in the X-axis and Y-axis, and the chassis input load in the Z-axis is increased, so that the strength and durability of the vehicle body are decreased. In addition, the rear mounting portion of the front subframe exists only in the cross section of the front side member, so there is a problem that the phases of the surrounding portion and the cross member are not consistent.

[0007] The information included in this Background section is only for increasing the understanding of the general background of the present application and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is already known in this field. SUMMARY

[0008] The various aspects of the present application are intended to provide a subframe mounting assembly structure of a vehicle body, which has the advantage of being able to achieve a flat floor structure and improve the strength and durability of the vehicle body by applying a "hat" type subframe mounting structure to the rear mounting portion of the front subframe (front side member).

[0009] The subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application is a transverse vehicle body structure mounted on a front side member arranged at a first side and a second side of a front portion of a vehicle body in a longitudinal direction of the vehicle body, the subframe mounting combination structure including a fender side member mounted at a rear end portion of the front side member in the longitudinal direction of the vehicle body, a first side extension member arranged in a transverse direction of the vehicle body and connected to an inner side of the fender side member, a second side extension member arranged in the transverse direction of the vehicle body and connected to an outer side of the fender side member, a tunnel member arranged in the transverse direction of the vehicle body, the tunnel member connecting the first side extension members of the first side and the second side of the vehicle body to each other at a central portion of the vehicle body and having the same phase as the first side extension members, and a hat-type bracket arranged to cover the fender side member at a portion where the fender side member is connected to the first side extension member and the second side extension member.

[0010] The subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application can further include a cowl lower side member arranged at and overlapping with an overlapping portion formed by the first side extension member and the second side extension member and the tunnel member.

[0011] A rear flange of the cowl lower side member, the first side extension member and the second side extension member, and a front flange of the tunnel member can be welded to overlap with each other.

[0012] The cowl lower side member can be arranged on a floor of the vehicle body.

[0013] The first side extension member and the second side extension member, and the tunnel member can be arranged below a floor of the vehicle body.

[0014] The hat-type bracket can be welded to overlap with a flange of the second side extension member on an outer surface of the fender side member.

[0015] The hat-type bracket can be welded to overlap with a flange of the first side extension member on an inner surface of the fender side member.

[0016] A hat-type reinforcement member can be welded to an inner surface of the hat-type bracket.

[0017] The subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application can further include a side rear reinforcement member forming a transverse section by being connected to the second side extension member and the fender side member.

[0018] According to various exemplary embodiments of the present application, a flat floor structure is achieved by applying a "hat type" subframe mounting structure, which can prevent durability deterioration due to an increase in height of a rear end mounting portion of a front subframe and an increase in chassis input load, and can improve the strength of the vehicle body.

[0019] The method and apparatus of the present application has other characteristics and advantages which will be apparent from or will be elaborated upon in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain certain principles of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view showing a case where the subframe mounting combination structure of the vehicle body according to various exemplary embodiments of the present application is applied to a front side member.

[0021] Figure 2 is a plan view showing the subframe mounting combination structure of the vehicle body according to various exemplary embodiments of the present application from below the vehicle body.

[0022] Figure 3 is an exploded perspective view showing a case where the subframe mounting combination structure of the vehicle body according to various exemplary embodiments of the present application is applied to a front side member.

[0023] Figure 4 is a perspective view showing the subframe mounting combination structure of the vehicle body according to various exemplary embodiments of the present application from below the vehicle body.

[0024] Figure 5 is a sectional view taken along the line "B-B" in Figure 4 .

[0025] Figure 6 is a sectional view taken along the line "C-C" in Figure 4 .

[0026] Figure 7 is a perspective view showing the subframe mounting combination structure of the vehicle body according to various exemplary embodiments of the present application from above the vehicle body.

[0027] Figure 8 is a sectional view taken along the line "A-A" in Figure 7 .

[0028] Figure 9 is a sectional view taken along the line "B-B" in Figure 7 .

[0029] Figure 10is a view showing a case where an X-axis load and a Y-axis load are applied to a sub-frame mounting combination structure of a vehicle body according to various exemplary embodiments of the present application.

[0030] Figure 11 is a view showing a load transmission path in a sub-frame mounting combination structure of a vehicle body according to various exemplary embodiments of the present application.

[0031] It is to be understood that the drawings are not necessarily to scale, as the emphasis generally being on illustrating the principles of the application. Specific design features (including, for example, specific dimensions, directions, positions and shapes) included in the application will be determined, in part, by the environment in which the application is used and applied.

[0032] In the drawings, like reference numerals refer to like parts throughout the various views in which like reference numerals indicate like or equivalent parts in the figures. DETAILED DESCRIPTION

[0033] Reference will now be made in detail to various embodiments of the application, examples of which are illustrated in the accompanying drawings. While the application will be described in conjunction with the exemplary embodiments, it will be understood that they are not intended to limit the application to those exemplary embodiments. On the contrary, the application is intended to cover all alternatives, modifications, equivalents and other embodiments that can be included within the spirit and scope of the application as defined by the appended claims.

[0034] Various exemplary embodiments of the present application will be described below in greater detail with reference to the accompanying drawings. The present application can be implemented in various ways, and is not limited to the exemplary embodiments described herein.

[0035] Further, in several exemplary embodiments of the present application, components having the same configuration are represented by the same reference numerals in exemplary embodiments, and only the configuration different from the exemplary embodiments of the present application is described in other exemplary embodiments.

[0036] It is noted that the drawings are schematic and not constructed to scale. The relative dimensions and proportions of parts in the drawings are exaggerated or reduced, for the sake of clarity, and are not necessarily to scale with respect to one another. Further, like reference numerals designate like elements throughout the various drawings. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can be present therebetween. It is noted that the drawings are schematic and not constructed to scale. The relative dimensions and proportions of parts in the drawings are exaggerated or reduced, for the sake of clarity, and are not necessarily to scale with respect to one another. Further, like reference numerals designate like elements throughout the various drawings. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can be present therebetween.

[0037] The exemplary embodiments of the present invention are illustrated in detail in one exemplary embodiment. Thus, numerous variations in the figures are contemplated. Therefore, the various exemplary embodiments are not limited to the specific shape of the regions shown in the figures, and may include, for example, modifications to the shape through manufacturing.

[0038] The subframe mounting assembly structure of the vehicle body according to various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Figure 1 This is a perspective view illustrating the application of a vehicle body subframe mounting assembly structure according to various exemplary embodiments of the present invention to a front side member. Figure 2 This is a plan view showing the subframe mounting assembly structure of the vehicle body according to various exemplary embodiments of the present invention from below the vehicle body. Figure 3 This is an exploded perspective view showing the application of a subframe mounting assembly structure of a vehicle body to a front side component according to various exemplary embodiments of the present invention.

[0040] First, refer to Figure 1 According to various exemplary embodiments of the present invention, the vehicle body subframe mounting assembly structure (the part indicated by "A") is respectively applied to the front (FR) subframe (front side member) arranged parallel to both sides of the front of the vehicle body in the longitudinal direction of the vehicle body.

[0041] like Figure 2 As shown, the vehicle body subframe mounting assembly structure according to various exemplary embodiments of the present invention includes a fender side member 1, a first side extension 2, a second side extension 3, a channel member 4, a hat-shaped bracket 5, and a rear side reinforcement member 8.

[0042] In the longitudinal direction of the vehicle body, the mudguard side component 1 is... Figure 1 The two sides shown are installed on each rear end portion of the front side member.

[0043] The first side extension 2 and the second side extension 3 are connected to the fender side member 1 in the lateral direction of the vehicle body. The first side extension 2 is connected to the fender side member 1 in a shape that extends toward the interior of the vehicle body, and the second side extension 3 is connected to the fender side member 1 in a shape that extends outward from the vehicle body.

[0044] The channel member 4 is arranged in the transverse direction of the vehicle body at the center of the vehicle body, and both ends of the channel member 4 are connected to the first side extension 2 on both sides. The channel member 4 can be connected to the first side extension 2 to have the same phase (height).

[0045] The hat-shaped bracket 5 is installed to cover the fender side member 1 at portions where the first and second side extension members 2 and 3 are connected to the fender side member 1. The hat-shaped bracket 5 can be welded to the fender side member 1, and the first and second side extension members 2 and 3 can be welded to an outer surface of the hat-shaped bracket 5.

[0046] Since the hat-shaped bracket 5 is installed to cover the fender side member 1, the connection between the fender side member 1 and the first side extension member 2 and the connection between the fender side member 1 and the second side extension member 3 can be strengthened, and a height difference generated when the fender side member 1 and the front subframe mounting portion are connected can be eliminated.

[0047] Figure 3 is an exploded perspective view illustrating a subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application applied to a front side member.

[0048] As Figure 3 shown, the first and second side extension members 2 and 3 can be connected with the passage member 4 therebetween at both sides. Although not shown in Figure 3 , the fender side member can be combined in a longitudinal direction of the vehicle body, and the hat-shaped bracket can be combined with the fender side member to cover the fender side member.

[0049] In Figure 3 , the first side extension member 2 can be connected to overlap a bottom of the passage member 4. In addition, the hat-shaped bracket 5 can be installed to cover the fender side member 1, the first side extension member 2 being positioned between the hat-shaped bracket 5 and the fender side member 1. In addition, the second side extension member 3 can be connected to an outer surface of the hat-shaped bracket 5. In addition, the second side extension member 3 and the fender side member can be connected through a side rear reinforcement 8.

[0050] In addition, a cowl lower side member 6 can be further installed at portions where the first and second side extension members 2 and 3 are connected with the passage member 4. The cowl lower side member 6 can be disposed inside a vehicle to share an "H" surface flange formed by the first and second side extension members 2 and 3 and the passage member 4. That is, the cowl lower side member 6 can be disposed on a floor of the vehicle body, and the first and second side extension members 2 and 3 and the passage member 4 can be disposed below the floor of the vehicle body. A rear flange of the cowl lower side member 6 and front flanges of the first and second side extension members 2 and 3 and the passage member 4 can be welded to overlap each other.

[0051] Figure 4 is a perspective view illustrating a subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application from below the vehicle body, Figure 5 is a sectional view taken along the line "B-B" in Figure 4 , and Figure 6is a cross-sectional view taken along the line "C-C" in Figure 4 .

[0052] Referring to Figure 4 , Figure 5 and Figure 6 , the first side extension 2 is connected in a shape extending toward the interior of the vehicle body so as to overlap the tunnel member 4 arranged in the lateral direction of the vehicle body. Also, the second side extension 3 is connected in a shape extending outward from the vehicle body so as to overlap the tunnel member 4. In the present configuration, the first and second side extensions 2 and 3 can be connected so as to have the same phase as the tunnel member 4. Also, one end portion of the side rear reinforcement member 8 can be connected to the side surface of the fender side member 1 in a vertical shape, and the other end portion of the side rear reinforcement member 8 can be coupled to the second side extension 3. Also, the hat-shaped bracket 5 can be welded on the inner surface of the fender side member 1 so as to overlap the flange of the first side extension 2.

[0053] As shown in Figure 5 , the fender side member 1 is in a "U" shape, and the lower edge portion of the "U" shape forms an "L" surface. The hat-shaped bracket 5 can be welded so as to overlap the "L" surfaces of both sides of the fender side member 1. Also, the first side extension 2 and the second side extension 3 can be welded to the outer side of the hat-shaped bracket 5 at portions of the "L" surfaces of both sides of the fender side member 1, respectively. That is, the hat-shaped bracket 5 can be welded on the outer surface of the fender side member 1 so as to overlap the flange of the second side extension 3. Also, the hat-shaped reinforcement member 7 can be welded on the inner surface of the hat-shaped bracket 5 across both inner surfaces of the hat-shaped bracket 5 in the lateral direction of the vehicle body.

[0054] Meanwhile, the upper portion of the fender side member 1 is curved outward in the lateral direction of the vehicle body, and the cowl lower side member 6 can be coupled so as to overlap this portion.

[0055] Meanwhile, as shown in Figure 6 , the fender side member 1 can be formed so as to form an "H" surface in the front-rear direction of the vehicle body, and the hat-shaped bracket 5 can be welded so as to overlap the "H" surface of the fender side member 1.

[0056] Figure 7 is a perspective view showing a subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application from above the vehicle body, Figure 8 is a cross-sectional view taken along the line "A-A" in Figure 7 , Figure 9 is a cross-sectional view taken along the line "B-B" in Figure 7 .

[0057] As shown in Figure 7As shown, the front apron lower side member 6 can be coupled to overlap the top of the fender side member 1 at a position facing the hat-shaped bracket 5. Meanwhile, one end of the side rear reinforcement member 8 can be connected to the side of the fender side member 1 in a vertical shape, and the other end of the side rear reinforcement member 8 can be coupled to the second side extension 3. Accordingly, the side rear reinforcement member 8 can reinforce the connection of the fender side member 1 and the second side extension 3.

[0058] As shown, in the vehicle body interior, the channel member 4 can be connected to overlap the bottom of the fender side member 1, and the first side extension 2 can be connected to overlap the bottom of the channel member 4. In addition, in the vehicle body interior, the front apron lower side member 6 can be welded to the top of the fender side member 1. Figure 8

[0059] In addition, as shown, in the vehicle body exterior, one end of the side rear reinforcement member 8 can be coupled vertically downward to the bottom of the fender side member 1, and the other end of the side rear reinforcement member 8 can be welded to the second side extension 3. In addition, the second side extension 3 can be welded to the bottom of the fender side member 1. That is, the side rear reinforcement member 8 can be configured as a cross-section connecting the fender side member 1 and the second side extension 3 to each other. In addition, the front apron lower side member 6 can be welded to the top of the fender side member 1 at a portion where the fender side member 1 and the second side extension 3 are welded. Figure 9

[0060] Figure 10 is a view illustrating a case when an X-axis load and a Y-axis load are applied to a subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application, Figure 11 is a view illustrating a load transfer path in a subframe mounting combination structure of a vehicle body according to various exemplary embodiments of the present application.

[0061] As shown, by the "H" shaped combination structure of the hat-shaped bracket 5 and the fender side member 1, and the hat-shaped reinforcement member 7 disposed inside the hat-shaped bracket 5, a load in the X direction, i.e., a longitudinal direction of the vehicle body, can be reduced. Figure 10 In addition, by the "L" shaped combination structure of the hat-shaped bracket 5 and the fender side member 1, and the hat-shaped reinforcement member 7 disposed inside the hat-shaped bracket 5, a load in the Y direction, i.e., a lateral direction of the vehicle body, can be reduced.

[0062] Meanwhile, as shown, a load transferred from a lower portion of the vehicle body enters an upper portion of the vehicle body through the first side extension 2 and the channel member 4, and is distributed to the inside of the vehicle through the fender side member 1 and the front apron lower side member 6.

[0063] Figure 11 Meanwhile, as shown, a load transferred from a lower portion of the vehicle body enters an upper portion of the vehicle body through the first side extension 2 and the channel member 4, and is distributed to the inside of the vehicle through the fender side member 1 and the front apron lower side member 6.​​​

[0064] Further, the load transmitted from the lower portion of the vehicle body is transmitted to the upper portion of the vehicle body via the second side extension member 3, and is distributed to the interior of the vehicle via the fender side member 1 and the under dash side member 6.

[0065] As described above, according to the various exemplary embodiments of the present application, by applying the "hat type" subframe mounting structure to achieve a flat floor structure, it is possible to prevent a decrease in durability due to an increase in the height of the rear end mounting portion of the front subframe and an increase in the chassis input load, and it is possible to improve the strength of the vehicle body.

[0066] For convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "top", "bottom", "upward", "downward", "front", "rear", "back", "inboard", "outboard", "inwardly", "outwardly", "interior", "exterior", "internal", "external", "inboard", "outboard", "forward", "rearward" are used to describe features of the exemplary embodiments with reference to the positions of these features as shown in the drawings. It will be further understood that the term "connected" or its derivatives refer both to direct and indirect connections.

[0067] The foregoing description of specific exemplary embodiments of the application presented herein is not intended to be exhaustive or to be limited to the precise forms of the specific embodiments disclosed. Many modifications and variations are possible in light of the above teachings. It is intended that the scope of the application be limited not with the specific embodiments presented, but rather by the claims recited below. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application and to thereby enable others skilled in the art to best utilize the application.

Claims

1. A subframe mounting combination structure of a vehicle body, which is a transverse vehicle body structure mounted on front side members arranged in a longitudinal direction of the vehicle body at first and second sides of a front portion of the vehicle body, the subframe mounting combination structure comprising: a fender side member mounted at a rear end portion of the front side member in the longitudinal direction of the vehicle body; a first side extension arranged in a lateral direction of the vehicle body and connected to an inner side of the fender side member; a second side extension arranged in the lateral direction of the vehicle body and connected to an outer side of the fender side member; a tunnel member arranged in the lateral direction of the vehicle body, the tunnel member connecting the first side extensions of the first and second sides thereof to each other at a central portion of the vehicle body, and the tunnel member having the same phase as the first side extensions; and a bracket arranged to cover the fender side member at portions where the fender side member is connected to the first and second side extensions.

2. The subframe mounting combination structure of the vehicle body according to claim 1, further comprising: a cowl lower side member arranged at and overlapping with an overlapping portion formed by the first and second side extensions and the tunnel member. a rear flange of the cowl lower side member, the first and second side extensions, and a front flange of the tunnel member are welded to overlap with each other.

3. The subframe mounting assembly of claim 2, wherein the subframe mounting assembly is a vehicle body subframe mounting assembly. the tunnel member is connected to overlap with a bottom of the fender side member, and the first side extension is connected to overlap with a bottom of the tunnel member.

4. The subframe mounting assembly of claim 3, wherein the subframe mounting assembly is a vehicle body subframe mounting assembly. the cowl lower side member is arranged on a floor of the vehicle body.

5. The subframe mounting assembly of claim 3, wherein the subframe mounting assembly is a vehicle body subframe mounting assembly. the first and second side extensions and the tunnel member are arranged below the floor of the vehicle body.

6. The subframe mounting assembly structure for the vehicle body according to claim 5, wherein, the bracket is welded to overlap with a flange of the second side extension on an outer surface of the fender side member.

7. The subframe mounting assembly of claim 1, wherein the subframe mounting assembly is a vehicle body subframe mounting assembly. a reinforcement member is connected to a first inner surface and a second inner surface of the bracket across the first and second inner surfaces in the lateral direction of the vehicle body.

8. The subframe mounting assembly of claim 7 wherein, the bracket is welded to overlap with a flange of the first side extension on an inner surface of the fender side member.

9. The subframe mounting assembly of claim 1, wherein the subframe mounting assembly is a body of a vehicle. a reinforcement member is welded to an inner surface of the bracket.

10. The subframe mounting assembly of claim 1, wherein:

11. The subframe mounting combination structure of the vehicle body according to claim 1, further comprising: a side rear reinforcement member forming a lateral section by being connected to the second side extension and the fender side member.

12. The subframe mounting combination structure of the vehicle body according to claim 11, wherein a first end portion of the side rear reinforcement member is connected to a bottom of the fender side member, and a second end portion of the side rear reinforcement member is connected to the second side extension, the second side extension is connected to the bottom of the fender side member. a cowl lower side member is connected to a top of the fender side member at a portion where the fender side member is connected to the second side extension.

13. The subframe mounting assembly of claim 12, wherein the subframe mounting assembly is a vehicle body subframe mounting assembly. ​

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