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KR-20260067445-A - LOWER STRUCTURE OF VEHICLE

KR20260067445AKR 20260067445 AKR20260067445 AKR 20260067445AKR-20260067445-A

Abstract

The present disclosure introduces a vehicle undercarriage structure comprising a first member, a second member, a pair of side members connecting the first member and the second member, and a connecting rail spaced apart from the side members and connecting the first member and the second member, wherein the connecting rail penetrates the first member and is coupled to the first member.

Inventors

  • 최인택
  • 허정원

Assignees

  • 현대자동차주식회사
  • 기아 주식회사
  • 서진산업 주식회사

Dates

Publication Date
20260513
Application Date
20241104

Claims (19)

  1. A first member extending in the width direction of the vehicle; A second member extending in the width direction of the vehicle and spaced apart from the first member in the length direction of the vehicle; A pair of side members extending in the longitudinal direction of the vehicle and connecting the first member and the second member; and A connecting rail that is spaced apart and disposed below the above-mentioned side member and connects the first member and the second member; is included. The above connecting rail penetrates the first member and is coupled to the first member, forming a vehicle undercarriage structure.
  2. In claim 1, The above-mentioned first member is a vehicle undercarriage structure that extends in the vertical direction and forms a front portion facing the front of the vehicle.
  3. In claim 2, A vehicle undercarriage structure in which the above-mentioned side member is connected to the upper part of the first member and the above-mentioned connecting rail is connected to the lower part of the first member.
  4. In claim 1, A vehicle undercarriage structure in which a coupling groove open toward the downward is formed at the bottom of the first member, and the connecting rail is inserted into the coupling groove.
  5. In claim 4, A vehicle undercarriage structure in which a protrusion is formed at the lower part of the coupling groove, and the protrusion supports the lower end of the connecting rail, thereby preventing the connecting rail from falling out of the coupling groove.
  6. In claim 1, A vehicle undercarriage structure having a protruding rim portion formed to surround the connecting rail at the point where the connecting rail of the first member passes through and is joined, and protrusion portions formed at both ends of the rim portion.
  7. In claim 1, The above-mentioned second member is a vehicle undercarriage structure comprising an upper member and a lower member spaced apart in the vertical direction.
  8. In claim 7, A vehicle undercarriage structure in which the upper member and the lower member are connected through a connecting member extending in the vertical direction.
  9. In claim 7, A vehicle undercarriage structure in which the side member is connected to the upper member and the connecting rail is connected to the lower member.
  10. In claim 1, The above connecting rail includes an upper part and a lower part having corresponding shapes, the upper part is a single plate with a shape open downward, and the lower part is a single plate with a shape open upward. A vehicle undercarriage structure in which the upper part and the lower part are combined so that the cross-section of the connecting rail forms a closed cross-section.
  11. In claim 1, A vehicle undercarriage structure in which one end penetrating the first member of the connecting rail has a closed end shape, and the other end coupled to the second member of the connecting rail has an open end shape and is coupled to the second member so that the open end is closed.
  12. In claim 1, A vehicle undercarriage structure in which a pair of the above-mentioned connecting rails are bent in a direction that spreads apart from each other toward the outside.
  13. In claim 12, A vehicle undercarriage, wherein the distance between points where one end of a pair of connecting rails is connected to a first member is longer than the distance between points where the other end of a pair of connecting rails is connected to a second member.
  14. In claim 1, A vehicle undercarriage structure further comprising: a connecting member disposed between the side member and the connecting rail and extending in an upward and downward direction to connect the side member and the connecting rail.
  15. In claim 14, A pair of the above connecting rails are bent outward in a direction that spreads apart from each other, and The above connecting member is positioned at a point where the connecting rail is bent or at a point adjacent to the bent point, in a vehicle undercarriage structure.
  16. In claim 14, A vehicle undercarriage structure wherein the above-mentioned side member is positioned outwardly from the above-mentioned connecting rail in the width direction of the vehicle, the upper end of the above-mentioned connecting member is bent outwardly and connected to the lower end of the above-mentioned side member, and the lower end of the above-mentioned connecting member is bent inwardly and connected to the upper end of the above-mentioned connecting rail.
  17. In claim 1, Lower arm mounting portions are formed at both ends of the first member and the second member, on which a lower arm is mounted, and A vehicle undercarriage structure, wherein the connecting rail is coupled to the first member at a point adjacent to the lower arm mounting portion of the first member and coupled to the second member at a point adjacent to the lower arm mounting portion of the second member.
  18. In claim 17, A vehicle undercarriage structure in which the above connecting rail is coupled to the first member at a point inward from the point where the lower arm mounting portion of the first member is formed, and is coupled to the second member at a point inward from the point where the lower arm mounting portion of the second member is formed.
  19. A vehicle comprising the vehicle undercarriage of claim 1.

Description

Lower Structure of Vehicle The present disclosure relates to a vehicle undercarriage structure comprising a first member, a second member, a pair of side members connecting the first member and the second member, and a connecting rail spaced apart from the side members and connecting the first member and the second member, wherein the connecting rail penetrates the first member and is coupled to the first member. A vehicle undercarriage structure mounted on the lower part of the vehicle's main frame may include a first member extending in the width direction of the vehicle and a second member extending in the width direction of the vehicle and spaced apart from the first member in the length direction of the vehicle. The vehicle undercarriage may include a side member connecting a first member and a second member to form a load path for effectively withstanding externally applied loads, and may additionally include a connecting rail connecting the first member and the second member to withstand a load large enough that the side member alone cannot withstand. Generally, the connecting rail may be welded or bolted to the first member and the second member. However, since the contact area between the connecting rail and the first and second members is narrow, cracks may occur at the connection points when welding or bolting is performed, resulting in a problem of reduced structural reliability. The matters described as background technology above are intended only to enhance understanding of the background of the present disclosure and do not constitute prior art already known to those skilled in the art. FIG. 1 is a drawing showing a vehicle undercarriage structure according to one embodiment. FIG. 2 is a top view of a vehicle undercarriage structure according to one embodiment. FIG. 3 is a drawing of a vehicle undercarriage structure according to one embodiment, viewed from below. FIG. 4 is a drawing showing the upper part of a connecting member according to one embodiment. FIG. 5 is a drawing showing a lower part of a connecting member according to one embodiment. FIG. 6 is a drawing showing the connection point between the first member and the connecting rail according to one embodiment. FIG. 7 is a drawing of a first member according to one embodiment viewed from the outside. FIG. 8 is a drawing showing a connecting member according to one embodiment. FIG. 9 is a drawing showing a lower arm being coupled to a vehicle undercarriage structure according to one embodiment. In describing the embodiments disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the embodiments disclosed in this specification. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of this disclosure. The disclosure below is not intended to limit this disclosure to the described form or specific field, and it is considered that various alternative modes and modifications to this disclosure are possible, whether explicitly stated or implied in this specification. Those skilled in the art will recognize that the form and details of this disclosure may change. The present disclosure is described with reference to specific embodiments. However, as understood by those skilled in the art to which the present disclosure pertains, the various embodiments disclosed herein may be modified or otherwise implemented in various other ways without departing from the spirit and scope of the present disclosure. Accordingly, the following description should be considered illustrative and is intended to teach those skilled in the art to the manner in which various embodiments are made and used. It will be understood that the forms of the disclosure shown and described herein are to be taken as representative embodiments. Equivalent elements, or materials, processes, or steps may be substituted for those representatively exemplified and described in the present disclosure. Expressions used in describing the present disclosure, such as "including," "comprising," "incorporating," "consisting of," "have," "is," etc., should be interpreted as allowing items, components, or elements not explicitly described to be indicated in a non-exclusive manner, i.e., to be indicated. In addition, references to the singular should be interpreted as including those related to the plural. Furthermore, the various embodiments disclosed herein should be accepted as illustrative and descriptive and should not be interpreted as limiting the content of the disclosure. All references to joining (e.g., attached, affixed, coupled, connected, etc.) are used so