A torsional and bending longitudinal beam structure for a truck chassis

Abstract

This utility model provides a torsional and bending-resistant longitudinal beam structure for a truck chassis, belonging to the technical field of automotive chassis longitudinal beam structures. It includes a beam body with multiple butt joint holes on both sides of its outer wall. The beam body's cross-section is shaped like an "Ω," creating an outward-facing "rolled edge." This small "rolled edge" significantly increases the moment of inertia of the cross-section, thereby improving bending stiffness. Furthermore, the "Ω"-shaped groove has a large torsional moment of inertia, making it less prone to torsional deformation under asymmetrical loads. An outer reinforcing plate is provided at the butt joint holes, forming a double-layer structure. This effectively prevents the butt joint holes from becoming the origin of fatigue cracks. The reinforcing ribs also significantly increase the beam body's cross-sectional moment of inertia, thereby improving bending and torsional stiffness. The reinforcing rib structure effectively disperses stress, preventing excessive stress concentration in localized areas, significantly delaying the generation and propagation of fatigue cracks, and extending service life.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive chassis longitudinal beam structure, and in particular to a torsional and bending resistant longitudinal beam structure for a cargo truck chassis. Background Technology

[0002] The chassis frame of a truck is a critical load-bearing component, and its performance directly affects the vehicle's load-bearing capacity, reliability, and safety. As the core skeleton of the frame, the longitudinal beams bear complex bending, torsional, and impact loads during vehicle operation, especially under unbalanced loads, emergency braking, and harsh road conditions. Under the long-term action of these alternating stresses, the longitudinal beams are prone to fatigue cracks and even torsional deformation in stress concentration areas (such as the mounting points of leaf spring brackets, areas with variable cross-sections of the longitudinal beams, and near the holes connecting to the crossbeams), seriously affecting the vehicle's service life and operational safety.

[0003] Currently, to improve the stiffness and strength of traditional channel-shaped or I-shaped longitudinal beams, the industry generally adopts the following technical solutions: 1. Increase plate thickness: This is the most direct method, increasing the moment of inertia of the longitudinal beam base material to enhance its cross-sectional area and thus its load-bearing capacity. However, this approach will significantly increase the chassis's self-weight. 2. Internal stiffeners: Simple straight or grid-type stiffeners are installed inside the longitudinal beam. In existing technologies, these stiffeners are mostly scattered, independent bars, and their layout often lacks optimization of the overall stress transmission path of the longitudinal beam. While this simple stiffener structure can locally improve the buckling resistance of the web, it is ineffective in suppressing the overall macroscopic torsional deformation of the longitudinal beam. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology, and to propose a torsional longitudinal beam structure for a truck chassis.

[0005] The technical problem to be solved by this utility model is to provide a torsion-resistant longitudinal beam structure for a truck chassis to solve the problem of poor torsion resistance in existing structures.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A torsional longitudinal beam structure for a truck chassis includes: a beam body, with multiple butt joint holes on both the left and right sides of the outer wall of the beam body, and outer reinforcing plates fixedly connected to both the left and right sides of the outer wall of the beam body, both of the outer reinforcing plates being located on the outer side of the beam body, the cross-sections of the beam body and the outer reinforcing plates being arranged in an "Ω" shape, and reinforcing ribs being fixedly installed in the inner cavity of the beam body.

[0007] Preferably, the reinforcing rib includes a top reinforcing rib and two side reinforcing ribs. The top reinforcing rib is fixedly connected to the top of the inner wall of the beam, and the two side reinforcing ribs are fixedly connected to the two sides of the inner wall of the beam, respectively.

[0008] Preferably, a plurality of connecting ribs II are fixedly installed between the upper rib and the two side ribs, and a plurality of connecting ribs I are provided on the outer side of the plurality of connecting ribs II. The plurality of connecting ribs I are respectively fixedly connected to the outer wall of the upper rib and the outer wall of the side rib.

[0009] Preferably, both the plurality of connecting ribs 2 and the plurality of connecting ribs 1 are arranged in a curved shape.

[0010] Preferably, the dimensions of the top reinforcing bar and the two side reinforcing bars are all equal.

[0011] Preferably, the outer reinforcing plate is fixedly installed on the outer wall of the beam by welding, the upper stiffener and the side stiffener are fixedly installed on the inner wall of the beam by welding, and the connecting stiffener one and the connecting stiffener two are fixedly installed on the outer wall of the upper stiffener and the side stiffener by welding.

[0012] Preferably, the number of the plurality of mating holes is set to five.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above scheme, the "Ω"-shaped design of the beam cross-section creates an outward-facing "rolled edge" on the outer side of the beam. This small "rolled edge" significantly increases the moment of inertia of the cross-section, thereby improving bending stiffness. Furthermore, the "Ω"-shaped groove has a large torsional moment of inertia, making it less prone to torsional deformation under asymmetrical loads. Additionally, an outer reinforcing plate is installed at the joint hole, forming a double-layer structure. This effectively prevents the joint hole from becoming the origin of fatigue cracks. The reinforcing ribs also significantly increase the beam's cross-sectional moment of inertia, thereby enhancing bending and torsional stiffness. Moreover, the reinforcing rib structure effectively disperses stress, preventing excessive stress concentration in localized areas, significantly delaying the initiation and propagation of fatigue cracks, and extending service life. Attached Figure Description

[0014] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0015] Figure 1 This is a schematic diagram of the external structure of the present invention at one angle from the top. Figure 2 This is a schematic diagram of the external structure of the present invention from another angle at the top; Figure 3This is a schematic diagram of the external structure of the present invention from a bottom view. Figure 4 This is a schematic cross-sectional view of the present invention. Figure 5 This is a structural distribution diagram of the reinforcing ribs of this utility model.

[0016] [Figure Labels] 1. Beam body; 2. Reinforcing bars; 21. Top reinforcing bar; 22. Side reinforcing bars; 23. Connecting reinforcing bar one; 24. Connecting reinforcing bar two; 3. Butt joint hole; 4. Outer reinforcing plate.

[0017] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides an anti-torsion longitudinal beam structure for a truck chassis, comprising: a beam body 1, with multiple butt joint holes 3 on both the left and right sides of the outer wall of the beam body 1, and external reinforcing plates 4 fixedly connected to both the left and right sides of the outer wall of the beam body 1, both of the external reinforcing plates 4 being located on the outside of the beam body 1, the cross sections of the beam body 1 and the external reinforcing plates 4 being arranged in an "Ω" shape, and reinforcing ribs 2 being fixedly installed in the inner cavity of the beam body 1.

[0021] Specifically, the "Ω"-shaped design of the beam 1 section creates an outward-facing "rolled edge" on the outer side of the beam 1. This small "rolled edge" significantly increases the moment of inertia of the section, thereby improving bending stiffness. Furthermore, the "Ω"-shaped groove has a large torsional moment of inertia, making it less prone to torsional deformation under asymmetrical loads. In addition, an outer reinforcing plate 4 is provided at the butt joint 3, forming a double-layer structure. This effectively prevents the butt joint 3 from becoming the origin of fatigue cracks. At the same time, the reinforcing rib 2 significantly increases the moment of inertia of the beam 1 section, thereby improving bending and torsional stiffness. Moreover, the reinforcing rib 2 effectively disperses stress, preventing excessive stress concentration in local areas, significantly delaying the generation and propagation of fatigue cracks, and extending service life.

[0022] In this embodiment, as Figure 5 As shown; the reinforcing bar 2 includes an upper reinforcing bar 21 and two side reinforcing bars 22. The upper reinforcing bar 21 is fixedly connected to the top of the inner wall of the beam 1, and the two side reinforcing bars 22 are fixedly connected to the two sides of the inner wall of the beam 1 respectively.

[0023] Specifically, by combining the top stiffener 21 with the side stiffener 22, the overall strength of the beam 1 is further improved, thereby achieving the goal of improving the resistance to torsion and bending.

[0024] In this embodiment, as Figure 5 As shown, multiple connecting ribs 24 are fixedly installed between the upper rib 21 and the two side ribs 22. Multiple connecting ribs 23 are provided on the outer side of the multiple connecting ribs 24. The multiple connecting ribs 23 are fixedly connected to the outer wall of the upper rib 21 and the outer wall of the side ribs 22 respectively.

[0025] Specifically, by using multiple connecting ribs 1 23 and multiple connecting ribs 24, in conjunction with the upper rib 21 and the side ribs 22, the internal cavity of the beam 1 is divided into multiple continuous irregularly shaped chambers, and by imitating the force principle of bones or plant veins, a spatial truss structure is formed to achieve the purpose of strengthening the anti-torsion effect.

[0026] In this embodiment, as Figure 5 As shown, multiple connecting ribs 24 and multiple connecting ribs 23 are all arranged in a curved shape.

[0027] Specifically, the above-mentioned configuration enables connecting rib 1 23 and connecting rib 24 to withstand forces in multiple directions, thereby improving their resistance to torsion and bending.

[0028] In this embodiment, as Figure 5 As shown; the top reinforcing bar 21 and the two side reinforcing bars 22 are all of equal size.

[0029] Specifically, the above-mentioned design facilitates the production of the top stiffener 21 and the side stiffener 22, thereby reducing production costs.

[0030] In this embodiment, as Figures 1-5 As shown; the outer reinforcing plate 4 is fixedly installed on the outer wall of the beam 1 by welding, the upper stiffener 21 and the side stiffener 22 are fixedly installed on the inner wall of the beam 1 by welding, and the connecting stiffener 1 23 and the connecting stiffener 24 are fixedly installed on the outer wall of the upper stiffener 21 and the side stiffener 22 by welding.

[0031] Specifically, through the above settings, the overall beam 1 structure is stable and has sufficient strength, thereby improving the anti-torsional effect.

[0032] In this embodiment, as Figures 1-3 As shown; the number of multiple mating holes 3 is set to five.

[0033] Specifically, the above settings enable connections at multiple locations during the installation of beam 1, thereby improving installation stability.

[0034] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A torsional and bending-resistant longitudinal beam structure for a truck chassis, characterized in that, include: The beam (1) has multiple docking holes (3) on both the left and right sides of its outer wall, and external reinforcing plates (4) are fixedly connected to both the left and right sides of its outer wall. Both external reinforcing plates (4) are located on the outside of the beam (1). The cross-sections of the beam (1) and the external reinforcing plates (4) are both arranged in an "Ω" shape. Reinforcing ribs (2) are also fixedly installed in the inner cavity of the beam (1).

2. The anti-torsional longitudinal beam structure for a truck chassis according to claim 1, characterized in that: The reinforcing rib (2) includes an upper rib (21) and two side ribs (22). The upper rib (21) is fixedly connected to the top of the inner wall of the beam (1), and the two side ribs (22) are fixedly connected to the two sides of the inner wall of the beam (1) respectively.

3. The anti-torsional longitudinal beam structure for a truck chassis according to claim 2, characterized in that: Multiple connecting ribs (24) are fixedly installed between the upper rib (21) and the two side ribs (22). Multiple connecting ribs (23) are provided on the outer side of the multiple connecting ribs (24). The multiple connecting ribs (23) are fixedly connected to the outer wall of the upper rib (21) and the outer wall of the side ribs (22) respectively.

4. The anti-torsional longitudinal beam structure for a truck chassis according to claim 3, characterized in that: The multiple connecting ribs 2 (24) and multiple connecting ribs 1 (23) are all arranged in a curved shape.

5. The anti-torsional longitudinal beam structure for a truck chassis according to claim 2, characterized in that: The dimensions of the top reinforcing bar (21) and the two side reinforcing bars (22) are set to be equal.

6. The anti-torsional longitudinal beam structure for a truck chassis according to claim 3, characterized in that: The outer reinforcing plate (4) is fixedly installed on the outer wall of the beam (1) by welding. The upper reinforcing bar (21) and the side reinforcing bar (22) are fixedly installed on the inner wall of the beam (1) by welding. The connecting reinforcing bar one (23) and the connecting reinforcing bar two (24) are fixedly installed on the outer wall of the upper reinforcing bar (21) and the side reinforcing bar (22) by welding.

7. The anti-torsional longitudinal beam structure for a truck chassis according to claim 1, characterized in that: The number of the plurality of said mating holes (3) is five.

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