Vehicle side sill structure

Abstract

To provide a vehicular side sill structure which enables a side sill reinforcement material to be securely attached to a side sill without using a bracket and welding by coupling a battery mounting pipe to the side sill reinforcement material by riveting and fastening a mounting bolt to the battery mounting pipe.SOLUTION: A disclosed vehicular side sill structure includes: a side sill having a cavity; a side sill reinforcement material housed in the cavity of the side sill; and a battery mounting pipe coupled to the side sill reinforcement material. The side sill reinforcement material is coupled to the side sill by fastening a mounting bolt to the battery mounting pipe.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle side sill, and more particularly to a vehicle side sill structure in which a battery mounting pipe is connected to a side sill reinforcement by riveting and a mounting bolt is fastened to the battery mounting pipe, thereby enabling the side sill reinforcement to be firmly attached to the side sill without using brackets or welding. [Background technology]

[0002] The vehicle includes a pair of side sills located on the left and right sides of the floor. The front end of each side sill is connected to the rear end of the front side member, and the rear end of each side sill is connected to the front end of the rear side member. The side sills serve to protect the passenger compartment from side collisions, frontal collisions, etc. Each side sill has a cavity that opens toward the exterior of the vehicle, and the side sill reinforcement is attached to the cavity of each side sill via multiple brackets and welding to prepare for a collision. The side sill reinforcement is an extrusion made of an aluminum-containing material through an extrusion process, and the side sill reinforcement extends along the length of the side sill. In an electric vehicle, a battery assembly may be assembled under the floor of the vehicle body, and both side edges of the battery assembly may be attached to side sill reinforcements via a plurality of bolts.

[0003] Side sills are made of steel for rigidity and strength, while side sill reinforcements are made of aluminum for the extrusion process. Due to their material properties, steel and aluminum cannot be directly joined by welding. For this reason, when attaching side sill reinforcements to the side sill cavities, dissimilar material joining techniques such as FDS (Flow Drill Screwing) and SPR (Self Pierce Rivet) are used, or mechanical joining techniques using bolts and nuts are used. However, dissimilar material joining techniques have the disadvantage of being expensive in terms of investment costs, while mechanical joining techniques have the disadvantage of requiring a relatively large number of work steps.

[0004] According to one example of a conventional method, multiple brackets made of steel are joined to the side sill reinforcement via FDS, and then the multiple brackets are joined to the side sill via spot welding, thereby attaching the side sill reinforcement to the side sill. According to the conventional technology, when the side sill reinforcement is attached to the cavity of the side sill, a relatively large number of brackets and welding points are required, which results in a relatively high weight and manufacturing cost. The matters described in this Background Art section are created to promote understanding of the background of the invention, and may include matters that are not conventional art known to those having ordinary skill in the art to which this technology pertains. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-251759 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was made in consideration of the problems with the conventional side sill structures described above, and its object is to provide a vehicle side sill structure in which the battery mounting pipe is connected to the side sill reinforcement by riveting and the mounting bolt is fastened to the battery mounting pipe, thereby enabling the side sill reinforcement to be firmly attached to the side sill without using brackets or welding. [Means for solving the problem]

[0007] In order to achieve the above object, according to one aspect of the present invention, there is provided a vehicle side sill structure comprising: a side sill having a cavity; a side sill reinforcement housed in the cavity of the side sill; and a battery mounting pipe coupled to the side sill reinforcement, wherein the side sill reinforcement is coupled to the side sill by fastening a mounting bolt to the battery mounting pipe, the side sill reinforcement has a first mounting hole through which the battery mounting pipe passes, and the battery mounting pipe is coupled to the first mounting hole of the side sill reinforcement, the battery mounting pipe has a cylindrical portion and a head portion provided at a lower end of the cylindrical portion, the cylindrical portion includes a deformable deformation portion and an upper portion located above the deformation portion, the deformation portion is located between the upper portion and the head portion, the upper portion has an internal thread portion, and the head portion has an outer diameter larger than a diameter of the first mounting hole, the head portion supports the side sill reinforcement, and the side sill reinforcement Horizontal center axis of The cavity of the side sill Horizontal center axis of The height of the head portion is determined so that the head portion is aligned with the head portion.

[0009] before The deformed portion may be configured to be deformed into an expanded portion by being expanded outward due to an axial load applied along the axial direction of the battery mounting pipe.

[0010] The first mounting hole may be provided in a bottom wall of the side sill reinforcement, the extension portion may press downward against the bottom wall of the side sill reinforcement, and the head portion may press upward against the bottom wall of the side sill reinforcement. The side sill may have a second mounting hole aligned with the first mounting hole and the battery mounting pipe, and the mounting bolt may pass through the second mounting hole and a cavity in the battery mounting pipe, and the male thread portion of the mounting bolt may be coupled to the female thread portion of the upper portion.

[0011] The side sill reinforcement member is provided with a The 1 mounting hole, and the side sill Mounting bolt penetrates The It has two mounting holes and is Record number 2 mounting holes, front Record number It may be aligned with one mounting hole. According to one aspect of the present invention, there is provided a vehicle side sill structure including a side sill having a cavity, a side sill reinforcement member received in the cavity of the side sill, and a battery mounting pipe coupled to the side sill reinforcement member, wherein the side sill reinforcement member is coupled to the side sill by fastening a mounting bolt to the battery mounting pipe, and the battery mounting pipe may include a cylindrical portion and a head portion provided at an upper end of the cylindrical portion. The cylindrical portion may include a deformable deformation portion, an upper portion located above the deformation portion, and a lower portion located below the deformation portion, wherein the upper portion has an upper female thread portion on an inner surface thereof, and the lower portion has a lower female thread portion on an inner surface thereof.

[0012] The deformed portion may be deformed into an expanded portion by being expanded outward due to an axial load applied along the axial direction of the battery mounting pipe. The side sill reinforcement may have a support rib that supports the extension portion, the extension portion presses the support rib upward, and the head portion presses the upper wall of the side sill downward.

[0013] The thickness of the deformation portion may be thinner than the thickness of the upper portion and the thickness of the lower portion. 。 [Effects of the Invention]

[0014] According to the vehicle side sill structure of the present invention, the battery mounting pipe is connected to the side sill reinforcement by riveting, and the mounting bolt is fastened to the battery mounting pipe, so that the side sill reinforcement can be firmly attached to the side sill without using brackets or welding, thereby reducing weight, costs, etc.

[0015] In addition, according to the vehicle side sill structure of the present invention, when the battery assembly is mounted to the battery mounting pipe via the mounting bolt, the battery mounting pipe evenly distributes the mounting load of the battery assembly, thereby enhancing the mounting rigidity and mounting strength of the battery assembly. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing a side sill and a side sill reinforcement of a vehicle side sill structure according to an embodiment of the present invention. [Figure 2] 1 is a diagram showing a side sill, a side sill reinforcement member, and a battery mounting pipe of a side sill structure for a vehicle according to an embodiment of the present invention. [Figure 3] 1 is a cross-sectional view showing a battery mounting pipe of a vehicle side sill structure according to an embodiment of the present invention. [Figure 4] 10 is a diagram showing a state in which the drift and anvil of the nut rivet are set on the battery mounting pipe in the vehicle side sill structure according to the embodiment of the present invention. FIG. [Figure 5] 10A and 10B are diagrams illustrating a state in which the deformed portion of the battery mounting pipe is deformed due to the drift of the nut rivet. [Figure 6] 1 is a cross-sectional view illustrating a structure in which a battery assembly is mounted on a vehicle side sill structure according to an embodiment of the present invention. [Figure 7] 10A and 10B are diagrams illustrating a state in which a load is applied to a vehicle side sill structure to which a battery assembly is attached according to an embodiment of the present invention; [Figure 8] 10 is a cross-sectional view showing a battery mounting pipe of a vehicle side sill structure according to another embodiment of the present invention. [Figure 9] 10 is a view showing a state in which the drift and anvil of the nut rivet are set on the battery mounting pipe in a vehicle side sill structure according to another embodiment of the present invention. FIG. [Figure 10] 10A and 10B are diagrams illustrating a state in which the deformed portion of the battery mounting pipe is deformed due to the drift of the nut rivet. [Figure 11] 10 is a cross-sectional view showing a structure in which a battery assembly is mounted in a side sill structure for a vehicle according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. When assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals whenever possible, even if they are displayed in different drawings. Furthermore, when describing the embodiments of the present invention, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0018] In describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," "(b)," etc. may be used. Such terms are used merely to distinguish the component from other components and do not limit the nature, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0019] Referring to Figures 1 and 2, a vehicle side sill structure 10 according to an embodiment of the present invention may include a side sill 11, a side sill reinforcement 12 housed in the side sill 11, and a battery mounting pipe 20 connecting the side sill 11 and the side sill reinforcement 12.

[0020] The side sill 11 may include a cavity 11a that is open to the exterior of the vehicle, an upper wall 11b facing the top of the vehicle, an interior wall 11c facing the interior of the vehicle, and a bottom wall 11d facing the ground. The cavity 11a may be defined by the upper wall 11b, the interior wall 11c, and the bottom wall 11d. For example, the side sill 11 may be made of a high-strength metal material such as steel.

[0021] The side sill reinforcement 12 may be an extruded product extruded along the length of the vehicle through an extrusion process. Referring to Fig. 4, the side sill reinforcement 12 may include an exterior wall 12a facing the exterior of the vehicle, an upper wall 12b facing the top of the vehicle, an interior wall 12c facing the interior of the vehicle, and a bottom wall 12d facing the ground. For example, the side sill reinforcement 12 may be made of a material with excellent toughness and rigidity, such as aluminum or an aluminum alloy.

[0022] When the side sill reinforcement 12 is accommodated in the cavity 11a of the side sill 11, the upper wall 12b of the side sill reinforcement 12 may be in contact with the upper wall 11b of the side sill 11, the interior side wall 12c of the side sill reinforcement 12 may face toward the interior side wall 11c of the side sill 11, and the bottom wall 12d of the side sill reinforcement 12 may be in contact with the bottom wall 11d of the side sill 11. The side sill reinforcement 12 may extend along the length of the side sill 11 and may have a plurality of ribs 31, 32, 33, 34 formed therein, and the plurality of ribs 31, 32, 33, 34 may extend along the length of the side sill reinforcement 12. The rigidity of the side sill reinforcement 12 can be increased by the plurality of ribs 31, 32, 33, 34, and thereby the collision load can be uniformly distributed via the plurality of ribs 31, 32, 33, 34 in the event of a side collision of the vehicle.

[0023] The side sill reinforcement 12 may have a horizontal rib 31 adjacent to the exterior wall 12a and a first vertical rib 32, and the horizontal rib 31 may extend horizontally from the exterior wall 12a. The first vertical rib 32 may extend vertically to connect the top wall 12b and the bottom wall 12d, and the first vertical rib 32 may be directly connected to the horizontal rib 31.

[0024] The side sill reinforcement 12 may have a support rib 33 adjacent to the interior side wall 12c and a second vertical rib 34, and the second vertical rib 34 may extend vertically to connect the top wall 12b and the bottom wall 12d, and the second vertical rib 34 may be spaced apart from the first vertical rib 32. The second vertical rib 34 may be directly connected to the support rib 33, and the support rib 33 may extend horizontally to connect the first vertical rib 32 and the interior side wall 12c.

[0025] The side sill reinforcement 12 may have a plurality of first mounting holes 14, 16, and 18 through which the battery mounting pipe 20 passes. The battery mounting pipe 20 may pass through the side sill reinforcement 12 via the plurality of first mounting holes 14, 16, and 18. Specifically, the side sill reinforcement 12 may have an upper mounting hole 14 formed in the top wall 12b, a lower mounting hole 18 formed in the bottom wall 12d, and a middle mounting hole 16 formed in at least one of the plurality of ribs 31, 32, 33, and 34. The diameters of the upper mounting hole 14, the lower mounting hole 18, and the middle mounting hole 16 may be the same or similar to each other, and the upper mounting hole 14, the lower mounting hole 18, and the middle mounting hole 16 may be aligned with each other. In particular, the middle mounting hole 16 may be drilled in a support rib 33 connected to the interior side wall 12c.

[0026] The side sill 11 may have a plurality of second mounting holes 13, 15 through which the battery mounting pipe 20 passes, and the plurality of second mounting holes 13, 15 may be aligned with the plurality of first mounting holes 14, 16, 18. The battery mounting pipe 20 may pass through the plurality of second mounting holes 13, 15 along the height direction of the side sill 11. Specifically, the side sill 11 may have a plurality of upper mounting holes 13 drilled in the top wall 11b and a plurality of lower mounting holes 15 drilled in the bottom wall 11d. The diameter of the upper mounting holes 13 may be the same as or similar to the diameter of the lower mounting holes 15, and the upper mounting holes 13 may be aligned with the lower mounting holes 15.

[0027] The battery mounting pipe 20 may be a hollow pipe that can accommodate the drift 51 of the nut rivet 50 and the mounting bolt 63. Referring to FIG. 3, the battery mounting pipe 20 may include a cylindrical portion 21 and a head portion 22 provided at the upper end of the cylindrical portion 21.

[0028] As will be described later with reference to Figures 5 to 7, the battery mounting pipe 20 is connected to the side sill reinforcement 12 and the side sill 11 by riveting, so that the side sill reinforcement 12 can be firmly attached to the cavity 11a of the side sill 11. According to one embodiment, for riveting the battery mounting pipe 20, the cylindrical portion 21 may include a deformable portion 23 that is deformable as shown in FIG. 3, an upper portion 24 located above the deformable portion 23, and a lower portion 25 located below the deformable portion 23.

[0029] The deformed portion 23 may be located in the middle of the cylindrical portion 21 , and the deformed portion 23 may be deformable by an axial load applied along the axial direction of the battery mounting pipe 20 . The deformation portion 23 may have relatively lower rigidity than the upper portion 24 and the lower portion 25, so that an axial load applied along the axial direction of the battery mounting pipe 20 does not deform the upper portion 24 and the lower portion 25, but the deformation portion 23 may be deformed. In particular, the deformation portion 23 may be located below the support rib 33, so that when the deformation portion 23 is deformed into the extension portion 23a, the extension portion 23a can press against the support rib 33. Referring to FIG. 5 , the extension portion 23a presses upward against the support rib 33 of the side sill reinforcement 12, and the head portion 22 presses downward against the upper wall 11b of the side sill 11, thereby riveting the battery mounting pipe 20 to the side sill reinforcement 12 and the side sill 11.

[0030] According to one example, the deformation portion 23 may have a thickness that is relatively thin compared to the thicknesses of the upper portion 24 and the lower portion 25. When an axial load is applied along the axial direction of the cylindrical portion 21, the deformation portion 23 can be easily expanded or bulged or deformed outwardly, and thus the deformation portion 23 can be deformed into an expanded portion 23a (bulged portion) as shown in FIG.

[0031] In another example, the deformed portion 23 may have longitudinally extending grooves or teeth on its inner or outer surface, and the grooves may be spaced apart along the circumferential direction. The grooves or teeth allow the deformed portion 23 to be more easily deformed outward when an axial load is applied to the cylindrical portion 21. According to another example, the deforming portion 23 may be made of a softer material than the upper portion 24 and the lower portion 25. When an axial load is applied to the cylindrical portion 21, the deforming portion 23 can be more easily deformed outward due to the multiple grooves or multiple tooth profiles.

[0032] The upper portion 24 may have an upper female thread portion 24a formed on its inner surface, and the lower portion 25 may have a lower female thread portion 25a formed on its inner surface. If the inner diameter of the upper female thread portion 24a and the inner diameter of the lower female thread portion 25a are smaller than the inner diameter of the deformed portion 23, the thickness of the deformed portion 23 may be thinner than the thickness of the upper portion 24 and the thickness of the lower portion 25. The diameter of the head portion 22 is formed larger than the diameter of the upper mounting hole 13 of the side sill 11 so that the head portion 22 can come into contact with the upper wall 11 b of the side sill 11 adjacent to the upper mounting hole 13 .

[0033] 4, when the side sill reinforcement 12 is received in the cavity 11a of the side sill 11, the upper mounting hole 14, the middle mounting hole 16, and the lower mounting hole 18 of the side sill reinforcement 12 are aligned with the upper mounting hole 13 and the lower mounting hole 15 of the side sill 11. A battery mounting pipe 20 may pass through the upper mounting hole 13 and the lower mounting hole 15 of the side sill 11, and the upper mounting hole 14, the middle mounting hole 16, and the lower mounting hole 18 of the side sill reinforcement 12. A head portion 22 of the battery mounting pipe 20 may contact the upper mounting hole 13 and the adjacent upper wall 11b of the side sill 11, and a deformed portion 23 may be located below the middle mounting hole 16.

[0034] 4, a drift 51 of a nut rivet 50 passes through the inside of the battery mounting pipe 20, and an external thread 52 of the drift 51 is screwed into the lower internal thread 25a of the lower part 25. An anvil 53 of the nut rivet 50 can press or support the head 22 of the battery mounting pipe 20 downward, so that the head 22 of the battery mounting pipe 20 can be held down by the anvil 53 of the nut rivet 50.

[0035] 5 , when the drift 51 moves upward due to the actuation of the nut rivet 50, the drift 51 can pull the lower portion 25 of the battery mounting pipe 20 toward the anvil 53. As a result, as the lower portion 25 of the battery mounting pipe 20 is pulled toward the anvil 53 by the nut rivet 50, an axial load (AF) can be applied upward along the axial direction of the battery mounting pipe 20. As a result, the deformed portion 23 located below the intermediate mounting hole 16 can be deformed into an expanded portion 23a by expanding in the outer diameter direction due to the axial load (AF). The expanded portion 23a can be formed by overlapping the upper and lower portions of the deformed portion 23, and the outer diameter of the expanded portion 23a can be larger than the diameter of the intermediate mounting hole 16.

[0036] 6 and 7, the battery assembly 60 may include a battery case 61 that houses a plurality of battery modules and electrical components, and a side mount 62 that protrudes from a side surface of the battery case 61 toward the side sill 11. A mounting bolt 63 may pass through the side mount 62 and the battery mounting pipe 20, and a male thread portion 63a of the mounting bolt 63 may be engaged with an upper female thread portion 24a of the battery mounting pipe 20.

[0037] The male thread portion 63a of the mounting bolt 63 is engaged with the upper female thread portion 24a of the battery mounting pipe 20, and the head portion 22 of the battery mounting pipe 20 presses against the upper wall 11b of the side sill 11, so that a first load (F1) may be applied downward along the axial direction of the battery mounting pipe 20. The extension portion 23a of the battery mounting pipe 20 presses upward against the support rib 33 of the side sill reinforcement 12, so that a second load (F2) may be applied upward along the axial direction of the battery mounting pipe 20. This allows the mounting load of the battery assembly 60 to be uniformly distributed, and the mount stiffness and / or mount strength of the battery assembly 60 may be enhanced.

[0038] 1 to 7 may be configured so that the battery mounting pipe 20 passes through the side sill 11 and the side sill reinforcement 12, with the head portion 22 of the battery mounting pipe 20 pressing downward against the upper wall 11b of the side sill 11 and the extension portion 23a of the battery mounting pipe 20 pressing upward against the support rib 33 of the side sill reinforcement 12. This allows the battery mounting pipe 20 to firmly connect the side sill 11 and the side sill reinforcement 12.

[0039] 8 to 11 are views showing a side sill structure 100 for a vehicle according to another embodiment of the present invention. Referring to Fig. 8 to 11, the side sill structure 100 for a vehicle according to another embodiment of the present invention may include a side sill 110, a side sill reinforcement 120 housed in the side sill 110, and a battery mounting pipe 200 connecting the side sill 110 and the side sill reinforcement 120.

[0040] The side sill 110 may include a cavity 111 that is open toward the exterior of the vehicle, an upper wall 112 that faces the top of the vehicle, an interior wall 113 that faces toward the interior of the vehicle, and a bottom wall 114 that faces the ground. The cavity 111 may be defined by the upper wall 112, the interior wall 113, and the bottom wall 114. According to one example, the side sill 110 may be made of a high-strength metal material such as steel.

[0041] The side sill reinforcement 120 may be an extruded product extruded along the length of the vehicle through an extrusion process. Referring to Fig. 11, the side sill reinforcement 120 may include an exterior wall 121 facing the exterior of the vehicle, an upper wall 122 facing the top of the vehicle, an interior wall 123 facing the interior of the vehicle, and a bottom wall 124 facing the ground. According to one example, the side sill reinforcement 120 may be made of a material with excellent toughness, rigidity, etc., such as aluminum or an aluminum alloy.

[0042] When the side sill reinforcement 120 is accommodated in the cavity 111 of the side sill 110, the top wall 122 of the side sill reinforcement 120 may face the top wall 112 of the side sill 110, the interior side wall 123 of the side sill reinforcement 120 may face the interior side wall 113 of the side sill 110, and the bottom wall 124 of the side sill reinforcement 120 may face the bottom wall 114 of the side sill 110. The side sill reinforcement 120 may extend along the length of the side sill 110 and may have a plurality of ribs 131, 132 formed therein, and the plurality of ribs 131, 132 may extend along the length of the side sill reinforcement 120. The rigidity of the side sill reinforcement 120 may be enhanced by the plurality of ribs 131, 132, thereby allowing the collision load to be uniformly distributed via the plurality of ribs 131, 132 during a side collision of the vehicle.

[0043] The side sill reinforcement 120 may have a horizontal rib 131 and a plurality of vertical ribs 132 connected to the horizontal rib 131. The horizontal rib 131 may extend horizontally to connect the exterior wall 121 and the interior wall 123. The vertical rib 132 may extend vertically to connect the top wall 122 and the bottom wall 124. The side sill reinforcement 120 may have a first mounting hole 125 through which the cylindrical portion 201 of the battery mounting pipe 200 passes. Specifically, the first mounting hole 125 may be formed in a bottom wall 124 of the side sill reinforcement 120.

[0044] The side sill 110 may have a second mounting hole 115 through which the mounting bolt 63 passes. Specifically, the second mounting hole 115 may be formed in a bottom wall 114 of the side sill 110. The second mounting hole 115 may be aligned with the first mounting hole 125 and the battery mounting pipe 200.

[0045] The battery mounting pipe 200 may be a hollow pipe that can accommodate the drift 51 of the nut rivet 50, the mounting bolt 63, etc. Referring to FIG. 8 , the battery mounting pipe 200 may include a cylindrical portion 201 and a head portion 202 provided at the lower end of the cylindrical portion 201.

[0046] 9 to 11, the battery mounting pipe 200 may be connected to the side sill reinforcement 120 by riveting, and the mounting bolts 63 for attaching the battery case 61 may be fastened to the battery mounting pipe 200, thereby firmly connecting the side sill reinforcement 120 to the side sill 110.

[0047] According to one embodiment, for riveting the battery mounting pipe 200, the cylindrical portion 201 may include a deformed portion 203 that is deformable, and an upper portion 204 that is located on the deformed portion 203. That is, the deformed portion 203 may be located between the upper portion 204 and the head portion 202. The deformation portion 203 may be located on the head portion 202, and the deformation portion 203 may be deformable by an axial load applied along the axial direction of the battery mounting pipe 200.

[0048] The deforming portion 203 may have relatively lower rigidity than the upper portion 204, so that an axial load applied along the axial direction of the battery mounting pipe 200 does not deform the upper portion 204, but the deforming portion 203 may deform. In particular, when the deforming portion 203 is deformed into the extension portion 203a, the extension portion 203a can press against the bottom wall 124 of the side sill reinforcement 120. Referring to FIG. 11 , the extension portion 203a presses downward against the bottom wall 124 of the side sill reinforcement 120, and the head portion 202 presses upward against the bottom wall 124 of the side sill 110, so that the battery mounting pipe 200 can be riveted to the side sill reinforcement 120 and the side sill 110.

[0049] According to one example, the deformed portion 203 may have a thickness that is relatively thin compared to the thickness of the upper portion 204. The deformed portion 203 may be easily expanded or bulged or deformed outwardly when an axial load is applied along the axial direction of the cylindrical portion 201, and thus may be deformed into an expanded portion 203a (bulged portion) as shown in FIG.

[0050] According to another example, the deformation portion 23 may have longitudinally extending grooves or teeth on its inner or outer surface, and the grooves may be spaced apart along the circumferential direction. The grooves or teeth allow the deformation portion 203 to be more easily deformed outward when an axial load is applied to the cylindrical portion 201. According to another example, the deforming portion 203 may be made of a softer material than the upper portion 204. When an axial load is applied to the cylindrical portion 201, the deforming portion 203 can be more easily deformed outward due to the plurality of grooves or teeth.

[0051] The upper portion 204 may have an internal thread 206 formed on its inner surface. If the internal diameter of the internal thread 206 is smaller than the internal diameter of the deformed portion 203, the thickness of the deformed portion 203 may be thinner than the thickness of the upper portion 204. The diameter of the head portion 202 may be larger than the diameter of the first mounting hole 125 so that the head portion 202 can contact the bottom wall 124 of the side sill reinforcement 120 adjacent to the first mounting hole 125 .

[0052] The cylindrical portion 201 of the battery mounting pipe 200, i.e., the upper portion 204 and the deformed portion 203, pass through the first mounting hole 125 of the side sill reinforcement 120, allowing the head portion 202 of the battery mounting pipe 200 to come into contact with the bottom wall 124 of the side sill reinforcement 120 adjacent to the first mounting hole 125. As a result, the head portion 202 of the battery mounting pipe 200 may be interposed between the bottom wall 124 of the side sill reinforcement 120 and the bottom wall 114 of the side sill 110, and the head portion 202 of the battery mounting pipe 200 supports the side sill reinforcement 120, allowing the position (horizontal position and / or vertical position) of the side sill reinforcement 120 to be evenly aligned within the cavity 111 of the side sill 110. That is, the side sill reinforcement 120 may be aligned at the vertical center and / or horizontal center of the cavity 111 of the side sill 110. The height (t) of the head portion 202 may be determined so that the side sill reinforcement 120 is evenly aligned with the vertical and / or horizontal middle position of the cavity 111 of the side sill 110.

[0053] 11 , the height (t) of the head portion 202 may be determined so that the horizontal central axis (X1) of the side sill reinforcement 120 is aligned with the horizontal central axis (X2) of the side sill 110. As a result, the side sill reinforcement 120 may be positioned symmetrically or evenly with respect to the horizontal central axis (X2) of the side sill 110 within the cavity 111 of the side sill 110, the top wall 122 of the side sill reinforcement 120 may be spaced apart from the top wall 112 of the side sill 110, and the bottom wall 124 of the side sill reinforcement 120 may be spaced apart from the bottom wall 114 of the side sill 110.

[0054] In this way, since the side sill reinforcement 120 can be aligned within the cavity 111 of the side sill 110 by the head portion 202 of the battery mounting pipe 200, the size of the side sill reinforcement 120 is reduced compared to the side sill 110, thereby reducing the manufacturing cost and weight of the side sill reinforcement 120 and ensuring the collision performance of the side sill reinforcement 120 relative to the side sill 110.

[0055] 9 , when the cylindrical portion 201 of the battery mounting pipe 200 is inserted into the internal space of the side sill reinforcement 120 through the first mounting hole 125, the head portion 202 of the battery mounting pipe 200 may contact the bottom wall 124 adjacent to the first mounting hole 125 of the side sill reinforcement 120, and the deformed portion 203 may be located above the first mounting hole 125 of the side sill reinforcement 120. A drift 51 of a nut riveter 50 passes through the interior of the battery mounting pipe 200, and an external thread 52 of the drift 51 is screwed into an internal thread 206 of the upper portion 204. The anvil 53 of the nut rivet 50 can press or support the head portion 202 of the battery mounting pipe 200 upward, so that the head portion 202 of the battery mounting pipe 200 can be held down by the anvil 53 of the nut rivet 50.

[0056] 10 , when the drift 51 moves downward due to the actuation of the nut rivet 50, the drift 51 can pull the upper portion 204 of the battery mounting pipe 200 toward the anvil 53. As a result, as the upper portion 204 of the battery mounting pipe 200 is pulled toward the anvil 53 by the nut rivet 50, an axial load AF1 may be applied downward along the axial direction of the battery mounting pipe 200. As a result, the deformed portion 203 located above the first mounting hole 125 may be expanded in the outward radial direction by the axial load AF1, and may be deformed into an expanded portion 203a. As a result, the battery mounting pipe 200 may be coupled to the first mounting hole 125 of the side sill reinforcement 120 through the expanded portion 203a. The expanded portion 203a may be formed by overlapping the upper and lower portions of the deformed portion 203, and the outer diameter of the expanded portion 203a may be larger than the diameter of the first mounting hole 125. After the battery mounting pipe 200 is joined to the side sill reinforcement 120, the nut rivet 50 may be separated from the battery mounting pipe 200.

[0057] 11 , when the side sill reinforcement 120 is accommodated in the cavity 111 of the side sill 110, the first mounting hole 125 of the battery mounting pipe 200 and the side sill reinforcement 120 may be aligned with the second mounting hole 115 of the side sill 110, the mounting bolt 63 may pass through the second mounting hole 115 of the side sill 110, the side mount 62 of the battery case 61, and the battery mounting pipe 200, and the male thread portion 63 a of the mounting bolt 63 may be engaged with the female thread portion 206 of the battery mounting pipe 200. When the male thread portion 63 a of the mounting bolt 63 is engaged with the female thread portion 206 of the battery mounting pipe 200 and the extension portion 203 a of the battery mounting pipe 200 presses downward on the bottom wall 124 of the side sill reinforcement 120, a third load (F3) may be applied downward along the axial direction of the battery mounting pipe 200. As a result, the head portion 202 of the battery mounting pipe 200 presses upward against the bottom wall 124 of the side sill reinforcement 120, so that a fourth load (F4) may be applied upward along the axial direction of the battery mounting pipe 200. This allows the mounting load of the battery assembly 60 to be uniformly distributed, and the mount stiffness and / or mount strength of the battery assembly 60 may be enhanced.

[0058] 8 to 11 may not penetrate the side sill 110 but may penetrate the bottom wall 124 of the side sill reinforcement 120, with the head portion 202 of the battery mounting pipe 200 pressing upward against the bottom wall 124 of the side sill reinforcement 120 and the deformed portion 203a of the battery mounting pipe 200 pressing downward against the bottom wall 124 of the side sill reinforcement 120. In other words, the battery mounting pipe 200 may be firmly connected to the side sill reinforcement 120 via riveting.

[0059] According to the present invention having the above-described configuration, the battery mounting pipes 20, 200 are connected to the side sill reinforcements 12, 120 by riveting, and the mounting bolts 63 are fastened to the battery mounting pipes 20, 200, so that the side sill reinforcements 12, 120 can be firmly attached to the side sills 11, 110 without using brackets or welding, thereby reducing weight and costs.

[0060] In addition, according to the present invention, when the battery assembly 60 is mounted to the battery mounting pipes 20, 200 via the mounting bolts 63, the battery mounting pipes 20, 200 uniformly distribute the mounting load of the battery assembly 60, thereby enhancing the mounting rigidity and mounting strength of the battery assembly 60.

[0061] The above description is merely an illustrative example of the technical concept of the present invention, and various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are for illustrative purposes only and are not intended to limit the technical idea of the present invention. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0062] 10 Side sill structure 11 Side sill 12 Side sill reinforcement 20 Battery mounting pipe 21 Cylindrical part 22 Head 23 Deformation section 24 Upper part 24a Upper female thread 25 Lower part 25a Lower female thread 100 Side sill structure 110 Side sill 120 Side sill reinforcement 200 Battery mounting pipe 201 Cylindrical part 202 Head 203 Deformed part 204 Upper part 206 Female thread

Claims

1. a side sill having a cavity; a side sill reinforcing member accommodated in the cavity of the side sill; a battery mounting pipe connected to the side sill reinforcement; and The side sill reinforcement is connected to the side sill by fastening a mounting bolt to the battery mounting pipe, the side sill reinforcement has a first mounting hole through which the battery mounting pipe passes, and the battery mounting pipe is coupled to the first mounting hole of the side sill reinforcement; the battery mounting pipe includes a cylindrical portion and a head portion provided at a lower end of the cylindrical portion, the cylindrical portion including a deformable deformation portion and an upper portion located above the deformation portion, the deformation portion being located between the upper portion and the head portion, and the upper portion having an internal thread portion; the head portion has an outer diameter larger than a diameter of the first mounting hole, the head portion supports the side sill reinforcement, and the height of the head portion is determined so that a horizontal center axis of the side sill reinforcement is aligned with a horizontal center axis of the cavity of the side sill.

2. 2. The vehicle side sill structure according to claim 1, wherein the deformed portion is deformed into the expanded portion by expanding outward due to an axial load applied along the axial direction of the battery mounting pipe.

3. The first mounting hole is provided in a bottom wall of the side sill reinforcement, 3. The side sill structure for a vehicle according to claim 2, wherein the extension portion presses downward against the bottom wall of the side sill reinforcement, and the head portion presses upward against the bottom wall of the side sill reinforcement.

4. 2. The side sill structure for a vehicle according to claim 1, wherein the side sill has a second mounting hole aligned with the first mounting hole and the battery mounting pipe, the mounting bolt passes through the second mounting hole and a hollow portion of the battery mounting pipe, and the male thread portion of the mounting bolt is coupled to the female thread portion of the upper portion.

5. 2. The side sill structure of claim 1, wherein the side sill reinforcement has a first mounting hole through which the battery mounting pipe passes, and the side sill has a second mounting hole through which the mounting bolt passes, the second mounting hole being aligned with the first mounting hole.

6. a side sill having a cavity; a side sill reinforcing member accommodated in the cavity of the side sill; a battery mounting pipe connected to the side sill reinforcement; and The side sill reinforcement is connected to the side sill by fastening a mounting bolt to the battery mounting pipe, the battery mounting pipe includes a cylindrical portion and a head portion provided at an upper end of the cylindrical portion; the cylindrical portion includes a deformable deformation portion, an upper portion positioned above the deformation portion, and a lower portion positioned below the deformation portion; the upper portion has an upper female thread portion on its inner surface, The lower portion has a lower female thread portion on its inner surface.

7. 7. The vehicle side sill structure according to claim 6, wherein the deformed portion is deformed into the expanded portion by expanding outward due to an axial load applied along the axial direction of the battery mounting pipe.

8. 8. The side sill structure for a vehicle according to claim 7, wherein the side sill reinforcement has a support rib that supports the extension portion, the extension portion presses the support rib upward, and the head portion presses the upper wall of the side sill downward.

9. 7. The vehicle side sill structure according to claim 6, wherein the thickness of the deformation portion is thinner than the thickness of the upper portion and the thickness of the lower portion.

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