Cross beam structure and frame

Abstract

The utility model belongs to the technical field of vehicles, and provides a cross beam structure and a frame. The cross beam structure is arranged on a vehicle frame, the vehicle frame is provided with two longitudinal beams which extend in the length direction of a vehicle and are oppositely arranged, the cross beam structure comprises a cross beam body and connecting assemblies, the cross beam body extends in the width direction of the vehicle, and the connecting assemblies are arranged at the two ends of the cross beam body. And the cross beam main body is connected with the longitudinal beam through the connecting assembly. According to the utility model, the local transverse rigidity of the frame is improved, the local mode of the frame is also improved, the dynamic exciting force of an engine is avoided, the resonance of the frame is avoided, and the roar noise of acceleration in a vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a crossbeam structure and a vehicle frame. Background Art

[0002] For fuel vehicles, the powertrain is the main source of vibration and noise, and has a great impact on the NVH (noise, vibration and harshness) performance of the entire vehicle. At the same time, the excitation of the power system will be transmitted to the body through the frame, thus causing NVH problems, so the design of the frame plays a decisive role in the NVH of the entire vehicle. For light truck models, their frames are constrained by cost and vehicle size, and generally adopt an open beam design. If the overall and local rigidity of the frame is not designed enough, it is easy to cause frame resonance and form a strong roaring noise.

[0003] Therefore, a new solution is needed to solve the above problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a crossbeam structure and a frame, which are used to solve the problem of insufficient local rigidity of the frame in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a crossbeam structure, which is specifically configured as follows: the crossbeam structure is arranged on a frame, the frame has two oppositely arranged longitudinal beams extending along the length direction of the vehicle, the crossbeam structure includes a crossbeam body and a connecting assembly, the crossbeam body extends along the width direction of the vehicle, the connecting assembly is arranged at both ends of the crossbeam body, and the crossbeam body is connected to the longitudinal beam through the connecting assembly.

[0006] Optionally, the crossbeam body is configured as a hollow circular tube, and both ends of the hollow circular tube are bent to form a "U"-shaped structure.

[0007] Optionally, the connecting assembly includes a crossbeam bracket and a suspension bracket connected to each other, a mounting portion is provided between the crossbeam bracket and the suspension bracket, and the crossbeam body is connected to the mounting portion.

[0008] Optionally, the crossbeam bracket abuts against the suspension bracket, and the middle part of the crossbeam bracket protrudes in a direction away from the suspension bracket to form a groove, and the groove and the suspension bracket form the mounting portion; the end of the crossbeam body is inserted into the mounting portion and abuts against the side wall of the groove.

[0009] Optionally, an end portion of the beam body is welded in the groove.

[0010] Optionally, one side of the suspension bracket connected to the crossbeam bracket is bent and extended in a direction away from the crossbeam bracket to form a mounting platform, the side wall of the longitudinal beam abuts on the crossbeam bracket, and the bottom surface of the longitudinal beam abuts on the mounting platform.

[0011] Optionally, the longitudinal beam is riveted to the cross beam bracket and the suspension bracket.

[0012] Optionally, the side of the suspension bracket facing away from the crossbeam bracket has an oppositely arranged protruding portion, and the protruding portion is provided with a mounting hole.

[0013] Optionally, the crossbeam bracket is screwed to the suspension bracket.

[0014] The utility model also provides a vehicle frame, the vehicle frame comprises any one of the above-mentioned crossbeam structures, and the crossbeam structure is arranged at a powertrain installation position of the vehicle frame.

[0015] As described above, a beam structure of the utility model has the following beneficial effects:

[0016] A crossbeam body extending in the width direction of the vehicle is provided, and the crossbeam body is connected to a longitudinal beam extending in the length direction of the vehicle through a connecting assembly, thereby improving the local lateral stiffness of the frame, while also improving the local mode of the frame, and helping to avoid the dynamic excitation force of the engine, helping to avoid resonance of the frame, and further helping to reduce the roaring noise caused by acceleration in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a structural schematic diagram of a crossbeam structure of an embodiment of the utility model;

[0018] Figure 2 Shown is a schematic structural diagram of a beam support according to an embodiment of the utility model;

[0019] Figure 3 Shown is a schematic structural diagram of a suspension bracket according to an embodiment of the utility model;

[0020] Figure 4 The figure shows a schematic diagram of modal detection of a vehicle frame without the crossbeam structure of the utility model installed;

[0021] Figure 5 The figure shows a schematic diagram of modal detection after the crossbeam structure of the utility model is installed on the vehicle frame;

[0022] Figure 6 The diagram shows a comparison of the roar noise detection inside the vehicle before and after the crossbeam structure of the utility model is installed on the vehicle frame.

[0023] Description of Reference Numerals

[0024] 1-frame; 11-longitudinal beam;

[0025] 2- beam body;

[0026] 3-connecting assembly; 31-crossbeam bracket; 311-groove; 32-suspension bracket; 321-mounting platform; 322-extension portion; 323-mounting hole. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The form, quantity and proportion of each component during actual implementation can be changed at will, and the component layout form may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantial change of the technical content.

[0029] Before describing the embodiment of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the frame of light truck models. The utility model solves the technical problem of insufficient local rigidity of the frame. By performing CAE (Computer Aided Engineering) analysis on the automobile body, the rigidity weak point of the frame is determined, and the rigidity weak point is located at the position where the powertrain is installed on the frame.

[0030] like Figures 1 to 3As shown, some embodiments of the present application provide a crossbeam structure, which is installed on a frame 1, and the frame 1 has two oppositely arranged longitudinal beams 11 extending in the length direction of the vehicle. The crossbeam structure of the present application includes a crossbeam body 2 and a connecting assembly 3, the crossbeam body 2 extends in the width direction of the vehicle, and the two ends of the crossbeam body 2 are connected to the connecting assembly 3. The crossbeam body 2 is connected to the longitudinal beam 11 through the connecting assembly 3, so that the crossbeam structure of the present application is connected to the frame 1, thereby improving the local lateral stiffness of the frame 1, and also improving the local mode of the frame 1, and is conducive to avoiding the dynamic excitation force of the engine, and is conducive to avoiding the resonance of the frame 1, and further conducive to reducing the roar noise of acceleration in the vehicle.

[0031] In some embodiments, in order to reduce costs, the cross beam body 2 is configured as a hollow circular tube, which is not only simple to manufacture, but also has higher axial rigidity. In addition, both ends of the hollow circular tube are bent to form a "U"-shaped structure for installation with the connecting assembly 3.

[0032] It should be noted that when the crossbeam body 2 is configured as a hollow circular tube, the openings at both ends of the hollow circular tube need to be closed to prevent impurities from entering the interior of the hollow circular tube.

[0033] In some embodiments, the connection assembly 3 includes a connected crossbeam bracket 31 and a suspension bracket 32. A mounting portion is formed between the crossbeam bracket 31 and the suspension bracket 32, and the crossbeam body 2 is connected to the mounting portion so that the crossbeam body 2 is connected to the connection assembly 3.

[0034] Specifically, the cross beam bracket 31 abuts against the suspension bracket 32, and the middle part of the cross beam bracket 31 protrudes in the direction away from the suspension bracket 32 ​​to form a groove 311, and the groove 311 and the suspension bracket 32 ​​form the above-mentioned mounting portion. In this embodiment, the mounting portion is a cylindrical structure with upper and lower openings. The end of the cross beam body 2 is inserted into the mounting portion, and the outer wall of the cross beam body 2 abuts against the inner wall of the groove 311 to connect with the cross beam bracket 31. Such a setting also reduces the deformation of the cross beam body 2 during the operation of the vehicle.

[0035] Exemplarily, the end of the beam body 2 is connected to the inner wall of the groove 311 by welding, so that the beam body 2 and the beam support 31 are an integrated structure, thereby increasing the strength of the beam structure of the present application.

[0036] It should be noted that the crossbeam bracket 31 and the suspension bracket 32 ​​are locked together by screws.

[0037] In some embodiments, one side of the suspension bracket 32 ​​connected to the crossbeam bracket 31 is bent and extended in a direction away from the crossbeam bracket 31 to form a mounting platform 321. The side walls of the longitudinal beam 11 abut against the crossbeam bracket 31, so that the crossbeam brackets 31 located on both sides of the frame 1 limit the width direction of the frame 1; the bottom surface of the longitudinal beam 1 abuts against the mounting platform 321, increasing the overlap area between the frame 1 and the suspension bracket 32, which is beneficial to increase the impedance of the power system to the frame 1 and reduce the vibration response.

[0038] Exemplarily, the longitudinal beam 11 is connected to the cross beam bracket 31 and the suspension bracket 32 ​​by riveting.

[0039] In some embodiments, the side of the suspension bracket 32 ​​facing away from the crossbeam bracket 31 has an oppositely disposed extension portion 322 , and the extension portion 322 is provided with a mounting hole 323 , and the engine is mounted on the suspension bracket 32 ​​through the mounting hole 323 .

[0040] In summary, the utility model provides a crossbeam structure, which is provided with a crossbeam body extending along the width direction of the vehicle. The crossbeam body is connected to the longitudinal beam extending along the length direction of the vehicle through a connecting component, thereby improving the local lateral stiffness of the frame, while also improving the local mode of the frame, and is beneficial to avoiding the dynamic excitation force of the engine, avoiding resonance of the frame, and further helping to reduce the roaring noise of acceleration in the vehicle.

[0041] Some embodiments of the present application further provide a vehicle frame, wherein the vehicle frame 1 comprises the above-mentioned crossbeam structure, and the crossbeam structure is installed at a powertrain mounting position of the vehicle frame 1 to improve the stiffness and mode of the powertrain mounting position of the vehicle frame 1.

[0042] Modal testing is performed on the frame 1 before and after the crossbeam structure of the present application is installed. The test results are as follows: Figure 4 and Figure 5 shown. Figure 4 This is the modal frequency detection diagram of the frame 1 without the crossbeam structure installed. The modal frequency of the frame 1 is 93.6Hz; Figure 5 This is a modal frequency detection diagram after the crossbeam structure is installed on the frame 1, and the modal frequency of the frame 1 is 119.6 Hz. It can be seen that after the crossbeam structure of the present application is installed on the frame 1, the modal frequency of the frame 1 is increased by 26 Hz.

[0043] The frame 1 is then subjected to a stiffness test before and after the crossbeam structure of the present application is installed, mainly for the stiffness test of the attachment point of the crossbeam structure on the bracket. The test structure is shown in Table 1:

[0044]

[0045] Table 1

[0046] It can be seen from Table 1 that after the crossbeam structure of the present application is installed on the frame 1, the stiffness of the frame 1 is increased by 79% in the Y direction and by 105% in the Z direction.

[0047] Finally, the vehicle frame 1 is tested for in-vehicle roar noise before and after the crossbeam structure of the present application is installed. The test results are as follows: Figure 6 As shown, the solid line is the detection structure of the frame 1 without the crossbeam structure installed, and the dotted line is the detection structure after the crossbeam structure is installed on the frame 1. When the engine speed is 2603rpm, the roar inside the vehicle is reduced by 11.2dB after the crossbeam structure is installed on the frame 1. From the above, it can be seen that after the crossbeam structure of the present application is installed on the frame 1, the effect of reducing the acceleration roar inside the vehicle is very obvious.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A crossbeam structure, arranged on a vehicle frame, wherein the vehicle frame has two oppositely arranged longitudinal beams extending in the length direction of the vehicle, characterized in that: The crossbeam structure comprises: A crossbeam body extending in the vehicle width direction; The connecting components are arranged at two ends of the cross beam body, and the cross beam body is connected to the longitudinal beam through the connecting components.

2. The crossbeam structure according to claim 1, characterized in that: The crossbeam body is configured as a hollow circular tube, and both ends of the hollow circular tube are bent to form a "U"-shaped structure.

3. The crossbeam structure according to claim 1 or 2, characterized in that: The connecting assembly comprises a crossbeam bracket and a suspension bracket connected to each other, a mounting portion is arranged between the crossbeam bracket and the suspension bracket, and the crossbeam body is connected to the mounting portion.

4. The crossbeam structure according to claim 3, characterized in that: The crossbeam bracket abuts against the suspension bracket, and the middle part of the crossbeam bracket protrudes in a direction away from the suspension bracket to form a groove, and the groove and the suspension bracket form the mounting portion; the end of the crossbeam body is inserted into the mounting portion and abuts against the side wall of the groove.

5. The crossbeam structure according to claim 4, characterized in that: The end of the beam body is welded in the groove.

6. The crossbeam structure according to claim 3, characterized in that: One side of the suspension bracket connected to the crossbeam bracket is bent and extended in a direction away from the crossbeam bracket to form a mounting platform, the side wall of the longitudinal beam abuts on the crossbeam bracket, and the bottom surface of the longitudinal beam abuts on the mounting platform.

7. The crossbeam structure according to claim 6, characterized in that: The longitudinal beam is riveted to the cross beam bracket and the suspension bracket.

8. The crossbeam structure according to claim 3, characterized in that: The side of the suspension bracket facing away from the crossbeam bracket has a protruding portion arranged opposite to the crossbeam bracket, and the protruding portion is provided with a mounting hole.

9. The crossbeam structure according to claim 3, characterized in that: The crossbeam bracket is screwed to the suspension bracket.

10. A frame, characterized in that: The vehicle frame comprises the crossbeam structure as described in any one of claims 1 to 9, and the crossbeam structure is arranged at a powertrain mounting position of the vehicle frame.

Images