KR-20260062251-A - CHASSIS FRAME FOR PURPOSE BUILD VEHICLE

KR20260062251AKR 20260062251 AKR20260062251 AKR 20260062251AKR-20260062251-A

Abstract

An invention relating to a chassis frame for a purpose-based vehicle is disclosed. A chassis frame for a purpose-based vehicle according to one embodiment of the present invention comprises a center module, a front module coupled to the front of the center module and having a front bumper at the front, and a connecting member that detachably connects the front module and the center module, wherein the front bumper may include a bumper beam.

Inventors

박현경
정지원
석성욱

Assignees

동해금속 주식회사

Dates

Publication Date: 20260507
Application Date: 20241028

Claims (12)

Center module; A front module coupled to the front of the center module and equipped with a front bumper at the front; and It includes a fastening part that detachably connects the front module and the center module, A purpose-based vehicle chassis frame characterized in that the above-described front bumper includes a bumper beam.
In paragraph 1, A purpose-based vehicle chassis frame characterized in that at least one of the center module and the front module is manufactured using aluminum material.
In paragraph 1, The above center module comprises a pair of center side members; and It includes a plurality of center cross members connecting the center side members, and A purpose-based vehicle chassis frame characterized by having a fixing bracket formed on each facing surface of the center side member to fix the center cross member.
In paragraph 3, The above-mentioned fixed bracket is an attachment piece attached to the inner surface of the center side member; A support member extending to one side of the attachment member and supporting the center cross member; and A purpose-based vehicle chassis frame characterized by including a reinforcing member that supports the above-mentioned support member.
In paragraph 3, A purpose-based vehicle chassis frame characterized by having a reinforcing rib formed on the inner surface of the center side member connecting opposing surfaces.
In paragraph 3, The above front module comprises a pair of front side members; A front cross member disposed between the rear ends of the above-mentioned front side members; and A purpose-based vehicle chassis frame characterized by including a front undercross member positioned between the lower portions of the above-mentioned front side members.
In paragraph 6, A purpose-based vehicle chassis frame characterized by having a reinforcing member formed on one side of the above-mentioned front side member.
In paragraph 6, A purpose-based vehicle chassis frame characterized by having support ribs formed on opposing sides of the front side member that are inserted into the interior of the front cross member.
In paragraph 6, The above front bumper further includes a bumper support member formed as a pair parallel to the bumper beam and coupled to the front module; A purpose-based vehicle chassis frame characterized by having an insertion groove formed at the leading end of the front side member into which the bumper support is inserted.
In Paragraph 9, The above bumper beam is, A beam body portion coupled to the above bumper support portion; and A purpose-based vehicle chassis frame characterized by including a beam bulkhead section formed as a bulkhead structure in a space formed on the inner side of the beam body section.
In paragraph 6, The above-mentioned binding portion is a binding piece portion extending from each end of the front side member; A binding groove formed in the center side member to be inserted into the binding piece; and A purpose-based vehicle chassis frame characterized by including a binding member that mutually binds the binding piece portion and the binding groove portion.
In Paragraph 11, A chassis frame for a purpose-based vehicle, characterized in that the above-mentioned binding piece has a boss portion formed on each side that extends to the inner surface of the opposite binding groove portion and to which the binding member is coupled.

Description

Purpose-based vehicle chassis frame The present invention relates to a chassis frame for a purpose-based vehicle, and more specifically, to a chassis frame for a purpose-based vehicle that can improve the fuel efficiency of an eco-friendly vehicle through weight reduction while maintaining rigidity. Generally, the commercial vehicle frame plays an important role in ensuring the overall stability of the vehicle and may include a front module, a center module, and a rear module. The vehicle frame refers to a skeletal structure on which chassis components or the body can be installed. It must be capable of sufficiently withstanding deformation, twisting, tension, compression, and local or total damage caused by vibration resulting from the vehicle's propulsion, braking, centrifugal force during steering, impact force from the road surface, vertical loads due to the vehicle's weight, and various reaction forces. Furthermore, it must be structured to sufficiently absorb the collision energy applied to the vehicle in the event of a collision. Due to the diversification of the automotive market, vehicle bodies are evolving in various ways to suit specific purposes, ranging from the conventional press monocoque method to Purpose Built Vehicles (PBVs) and space frames. In particular, low-cost EV vehicles require body structures that deviate from conventional methods to maximize profitability. However, conventionally, since the frame is made of steel to maintain rigidity, there is a problem where fuel efficiency decreases due to its own weight. Therefore, there is a need to improve this. The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. The background technology of the present invention is disclosed in Korean Registered Patent Publication No. 10-0551261 (registered on February 3, 2006, title of invention: rear frame engine module mounting structure of a bus). FIG. 1 is a perspective view illustrating a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a chassis frame for a purpose-based vehicle according to one embodiment of the present invention. FIG. 3 is a drawing illustrating an embodiment of a bumper beam of a purpose-based vehicle chassis frame according to an embodiment of the present invention. FIG. 4 is a drawing illustrating another embodiment of a bumper beam of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 5 is a drawing illustrating the structural analysis results for each case of a bumper beam of a purpose-based vehicle chassis frame according to an embodiment of the present invention, FIG. 5a is a drawing illustrating an example of an analysis tool, boundary conditions, and results of the structural analysis conditions, FIG. 5b is a drawing illustrating a graph of the shape and structural analysis results for each case of the bumper beam, and FIG. 5c is a drawing illustrating a table of the structural analysis results for each case of the bumper beam. FIG. 6 is a drawing illustrating an example of a first condition for front collision analysis by case of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 7 is a diagram illustrating the analysis results of the first condition of the front collision analysis for each case of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 8 is a drawing illustrating an example of a second condition for front collision analysis by case of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 9 is a diagram illustrating the analysis results of a second condition of forward collision analysis for a purpose-based vehicle chassis frame according to one embodiment of the present invention, where FIG. 9a is a diagram illustrating the amount of displacement in the second condition of forward collision analysis for each case, and FIG. 9b is a diagram illustrating the energy absorption rate in the second condition of forward collision analysis for each case. Figure 10 is a cross-sectional view of AA of Figure 1. FIG. 11 is a drawing showing the connection of a center crossmember of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 12 is a drawing showing the connection of a front cross member of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 13 is a drawing showing the connection of a front bumper of a purpose-based vehicle chassis frame according to one embodiment of the present invention. FIG. 14 is a drawing showing the connection of a connecting part of a purpose-based vehicle chassis frame according to one embodim