Tubular beam and frame

Abstract

The utility model belongs to the technical field of vehicle structural members, and discloses a tubular beam and a frame. The tubular beam comprises a tubular beam body, at least two longitudinal connecting parts and at least one transverse connecting part. The cross section of the tubular beam body is of a rectangular structure, the tubular beam body is hollow, and reinforcing ribs are formed on the inner wall of the tubular beam body and located in a hollow cavity of the tubular beam body. The longitudinal connecting parts are formed at the two ends of the tubular beam body correspondingly and used for being connected with longitudinal beams on the two sides correspondingly. The transverse connecting part is formed on the tubular beam body and used for being connected with a cross beam. Blind holes are formed in one or more of the two end walls of the tubular beam body, the longitudinal connecting parts and the transverse connecting parts. The pipe beam body is of a hollow structure, the blind hole design is combined, and the material consumption can be remarkably reduced. In addition, a traditional solid structure is replaced by the blind holes, the overall weight can be reduced on the premise that necessary strength is kept, the automobile lightweight trend is met, and the energy efficiency and the control performance of the automobile are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle structural member technical field especially, relates to a pipe beam and frame. BACKGROUND

[0002] In the truck frame, the pipe beam is used for connecting key components as a support hub, bears load transmission function, ensures the rigidity, stability and load capacity of the frame. The traditional pipe beam is generally made of hollow tubular or box structure through casting process.

[0003] However, the design scheme of the traditional pipe beam has long relied on material stacking strategy, and the strength and rigidity are improved by increasing wall thickness or reinforcing rib, which leads to low material utilization and redundant structure. This design concept is contrary to the modern lightweight trend, not only causes raw material waste, but also significantly increases the weight of the pipe beam, which restricts the improvement of vehicle energy efficiency and control performance.

[0004] Therefore, the above problems need to be solved. INVENTION CONTENTS

[0005] The utility model aims at providing a pipe beam and frame to reduce material consumption, reduce overall weight under the premise of maintaining necessary strength, meet the automobile lightweight trend, and improve vehicle energy efficiency and control performance.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A pipe beam, the pipe beam includes a pipe beam body, at least two longitudinal connecting parts and at least one transverse connecting part;

[0008] The cross section of the pipe beam body is rectangular structure, the pipe beam body is hollow, the inner wall of the pipe beam body is formed with reinforcing ribs, and the reinforcing ribs are located in the hollow cavity of the pipe beam body;

[0009] All the longitudinal connecting parts are respectively formed on the two ends of the pipe beam body to be connected with the longitudinal beams on both sides respectively;The transverse connecting part is formed on the pipe beam body, and the transverse connecting part is used for being connected with the cross beam;

[0010] Blind holes are arranged on one or more of the two end walls of the pipe beam body, the longitudinal connecting part and the transverse connecting part.

[0011] As preferably, the cross section of the pipe beam body is cuboid, the transverse connecting part is formed in the middle of the pipe beam body, and the transverse connecting part extends to at least three continuous adjacent sides of the pipe beam body.

[0012] As preferably, the transverse connecting part includes:

[0013] a base block connected to one side of the tube beam body;

[0014] two reinforcing blocks connected to two opposite sides of the base block respectively and extending to be connected to two sides of the tube beam body.

[0015] Preferably, the tube beam body is formed with a cavity in the side wall of the reinforcing block, and the cavity is communicated with the hollow part of the tube beam body.

[0016] Preferably, the first reserved position is formed at the position adjacent to the base block and the reinforcing block to avoid the near centroid of the transverse connecting part.

[0017] Preferably, the second reserved position is formed at the end position of the reinforcing block to avoid the near centroid of the end of the reinforcing block.

[0018] Preferably, the longitudinal connecting part and the transverse connecting part are both distributed with a plurality of functional holes.

[0019] Preferably, the functional hole is one of the blind hole and the through hole.

[0020] A frame comprising two longitudinal beams, one transverse beam and the tube beam as described above, the two longitudinal beams and the transverse beam are connected into one body through the tube beam.

[0021] The beneficial effects of the present application are as follows:

[0022] The tube beam body adopts a hollow structure, and in combination with the blind hole design, the material usage can be significantly reduced. In addition, the blind hole replaces the traditional solid structure, and under the premise of maintaining the necessary strength, the overall weight can be reduced, which meets the trend of automobile lightening, improves the energy efficiency and control performance of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic view of the tube beam provided by the present application;

[0024] Fig. 2 is a front view of the tube beam provided by the present application;

[0025] Fig. 3 is a sectional view of the tube beam provided by the present application.

[0026] In the drawings:

[0027] 1, tube beam body; 2, longitudinal connecting part; 3, transverse connecting part; 31, base block; 32, reinforcing block; 321, second reserved position; 33, first reserved position; 4, functional hole; 5, reinforcing rib. DETAILED DESCRIPTION

[0028] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings. It is being understood that the same are merely exemplary.

[0029] In the present application, the terms "comprising", "containing", "including", "having" or any other similar forms are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0030] In the present application, the term "and / or", is a description of the association relationship of the associated objects, which means that there can be three kinds of relationships. For example, a centrifugal vortex magnetic force pump and / or a centrifugal vortex magnetic force pump can represent three cases: only one centrifugal vortex magnetic force pump exists, both a centrifugal vortex magnetic force pump and a centrifugal vortex magnetic force pump exist, and only a centrifugal vortex magnetic force pump exists. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in a "and / or" relationship.

[0031] In the present application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection means that two parts or components are connected together without setting intermediate parts, indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0032] In the present application, those of ordinary skill in the art will understand that the relative terms used in connection with a quantity or a condition (for example, "about", "approximately", "substantially" and the like) include the value indicated and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0033] In this application, it will be understood by those of ordinary skill in the art that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or a combination of multiple parts.

[0034] In this application, the terms "upper", "lower", "left", "right", "front", "back", and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the application. In addition, it is also understood in the context that when referring to one element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below, and back below, etc.

[0035] Please refer to Figs. 1 to 3 The embodiment provides a tubular beam, which comprises a tubular beam body 1, at least two longitudinal connecting parts 2, and at least one transverse connecting part 3. The cross section of the tubular beam body 1 is a rectangular structure, the tubular beam body 1 is in a hollow state, and the inner wall of the tubular beam body 1 is formed with a reinforcing rib 5, and the reinforcing rib 5 is located in the hollow cavity of the tubular beam body 1. All longitudinal connecting parts 2 are respectively formed on both ends of the tubular beam body 1, and are respectively used for connecting with longitudinal beams on both sides; the transverse connecting part 3 is formed on the tubular beam body 1, and is used for connecting with a transverse beam. One or more of the two end walls of the tubular beam body 1, the longitudinal connecting parts 2, and the transverse connecting part 3 are provided with a blind hole.

[0036] It can be understood that the tubular beam body 1 adopts a hollow structure, and in combination with the blind hole design, the material usage can be significantly reduced. In addition, the blind hole replaces the traditional solid structure, and can reduce the overall weight under the premise of maintaining the necessary strength, conforms to the trend of automobile lightening, and improves the energy efficiency and handling performance of the vehicle. It can also be understood that the blind hole can remove redundant materials in the invalid bearing area (such as parts with small stress distribution), so that the materials are concentrated in the key stress area (such as the longitudinal connecting part 2 and the transverse connecting part 3), avoiding the waste caused by the traditional "material stacking", and improving the material performance play efficiency.

[0037] It is worth noting that the middle of the tubular beam is usually the area with the maximum bending moment. Therefore, the inner wall of the tubular beam body 1 is formed with a reinforcing rib 5, and the reinforcing rib 5 is located in the hollow cavity of the tubular beam body 1, which can significantly improve the structural strength of the tubular beam. It should be noted that the reinforcing rib 5 is preferably integrally formed with the tubular beam body 1 by casting process to reduce production cost and improve structural strength. In this embodiment, two reinforcing ribs 5 are provided, and the two reinforcing ribs 5 are arranged side by side.

[0038] It should be noted that the influence of the position and size of the blind hole on the structural strength needs to be verified by using the finite element analysis method and the topological optimization design to ensure that the weight reduction does not sacrifice performance, that is, the blind hole position needs to be set in the non-critical load-bearing area. Illustratively, first, the full-load limit condition of the whole vehicle is set, and the load is extracted based on multi-body dynamics. Then, the design and non-design intervals are divided under the process assembly constraints to optimize the response of the design interval volume fraction and strain energy, and the minimum strain energy is calculated, and finally the hollow and blind hole structure is formed under the premise of retaining the key force transmission path. Finally, the optimized tubular beam is verified to achieve the collaborative optimization of lightweight and mechanical performance.

[0039] In this embodiment, the cross section of the tubular beam body 1 is in the shape of a cuboid, the transverse connecting part 3 is formed in the middle of the tubular beam body 1, and the transverse connecting part 3 extends to at least three continuous adjacent sides of the tubular beam body 1. It can be understood that the orthogonal characteristics of the cuboid cross section can effectively transmit the composite load in X, Y and Z directions, and the transverse connecting part 3 covers three sides to form a three-dimensional force transmission network, which significantly improves the torsional and bending stiffness. In addition, by expanding the connection interface, the concentrated stress is dispersed to a larger area, the local stress peak is reduced, and the risk of fatigue failure is avoided.

[0040] Specifically, the transverse connecting part 3 includes a base block 31 and two reinforcing blocks 32. One side of the base block 31 is connected to one side of the tubular beam body 1. The two reinforcing blocks 32 are respectively connected to the two sides opposite to the base block 31 and extend to be connected to the two sides of the tubular beam body 1. In this way, the base block 31 serves as a main force transmission node to connect one side of the tubular beam, and the two reinforcing blocks 32 extend to the two sides to form supports, converting the composite load in X, Y and Z directions into a triangular stable force transmission path, which significantly improves the torsional stiffness compared with the traditional single-sided connection.

[0041] In particular, the tubular beam body 1 is formed with a cavity on the side wall of the reinforcing block 32, and the cavity is in communication with the hollow part of the tubular beam body 1. It can be understood that the cavity can further reduce the amount of material used. In addition, the cavity and the hollow part of the tubular beam body 1 can systematically optimize the interior of the tubular beam, removing a large number of invalid load-bearing areas and reducing material waste.

[0042] In the field of engineering mechanics, the near centroid refers to the area near the centroid (geometric center) of the cross section of a structure or a member. Under the action of bending moment, the strain and stress of the material near the centroid are the smallest (tending to zero), and the stress of the edge area far from the centroid is the largest. Therefore, removing the material near the centroid has less impact on the overall stiffness, but can significantly reduce the weight, which is a key strategy for lightweight design. In combination with the present embodiment, the first empty position 33 is formed at the position adjacent to the base block 31 and the reinforcing block 32 to avoid the centroid of the transverse connecting part 3.

[0043] Generally, the end of the reinforcing block 32 bears the combined load of bending moment and shear, and the material in the near centroid area has low contribution. Similarly, the second empty position 321 is formed at the end position of the reinforcing block 32 to avoid the centroid of the end of the reinforcing block 32. By transferring the material to the outer edge (stress concentration area) through the second empty position 321, the material usage can be further reduced, and the local bending stiffness of the reinforcing block 32 can be improved.

[0044] In the present embodiment, a plurality of functional holes 4 are distributed on the longitudinal connecting part 2 and the transverse connecting part 3. It can be understood that by reasonably arranging the functional holes 4 in the low stress area (such as near the neutral axis), the material usage can be reduced while maintaining or improving the stiffness of the key area. In addition, the functional holes 4 can be used as positioning reference for the casting core, reducing the need for special tooling, and greatly shortening the processing time. At the same time, the functional holes 4 serve as connecting holes during the assembly of the tubular beam, improving the assembly efficiency.

[0045] Specifically, the functional hole 4 is one of a blind hole and a through hole. It can be understood that the blind hole can achieve weight reduction without penetrating the structure, while retaining the material at the bottom of the functional hole 4 to form a local reinforcing rib 5, and the through hole removes more material and has higher weight reduction efficiency. It should be noted that the functional hole 4 is selected from the blind hole and the through hole according to the actual design requirements, and the present embodiment does not repeat the description here.

[0046] The present embodiment further provides a vehicle frame comprising two longitudinal beams, a transverse beam and the tubular beam described above, the two longitudinal beams and the transverse beam being connected into one body by the tubular beam. It can be understood that the vehicle frame comprising the above-described tubular beam has low material usage and low production cost.

[0047] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A tubular beam, characterized in that, The pipe beam comprises a pipe beam body (1), at least two longitudinal connecting parts (2) and at least one transverse connecting part (3); The pipe beam body (1) is in a hollow structure, and the inner wall of the pipe beam body (1) is provided with a reinforcing rib (5) in the hollow cavity of the pipe beam body (1); All the longitudinal connecting parts (2) are respectively formed at both ends of the pipe beam body (1) for connecting with the longitudinal beams on both sides; and the transverse connecting part (3) is formed on the pipe beam body (1) for connecting with the transverse beam. Blind holes are arranged on one or more of the two end walls of the pipe beam body (1), the longitudinal connecting part (2) and the transverse connecting part (3).

2. A tubular beam according to claim 1, wherein The pipe beam body (1) is in a cuboid structure, the transverse connecting part (3) is formed in the middle of the pipe beam body (1), and the transverse connecting part (3) extends to at least three continuous adjacent sides of the pipe beam body (1).

3. A tubular beam according to claim 2, wherein, The transverse connecting part (3) comprises: a base block (31) connected with one side of the pipe beam body (1); two reinforcing blocks (32) connected with the two opposite sides of the base block (31) and extending to the two sides of the pipe beam body (1).

4. A tubular beam according to claim 3, wherein, The side wall of the pipe beam body (1) where the reinforcing block (32) is formed has a cavity, and the cavity is communicated with the hollow part of the pipe beam body (1).

5. A tubular beam according to claim 3, wherein The first reserved position (33) is formed at the position adjacent to the base block (31) and the reinforcing block (32) to avoid the centroid of the transverse connecting part (3).

6. A tubular beam according to claim 3, wherein The second reserved position (321) is formed at the end position of the reinforcing block (32) to avoid the centroid of the end of the reinforcing block (32).

7. A tubular beam according to claim 1, wherein The longitudinal connecting part (2) and the transverse connecting part (3) are both provided with a plurality of functional holes (4).

8. A tubular beam according to claim 7, wherein The functional hole (4) is one of the blind hole and the through hole.

9. A vehicle frame, characterized by The pipe beam, the two longitudinal beams and the transverse beam are connected into one body through the pipe beam.

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