Modal reinforcing structure of automobile instrument tubular beam

Abstract

The utility model discloses an automobile instrument tubular beam modal strengthening structure, an air conditioner installation support is arranged on an instrument tubular beam, a cross beam is fixedly connected between the bottoms of the air conditioner installation support, and the cross beam is detachably connected with a middle supporting leg. And the riding comfort is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile instrument assembly. Specifically, the utility model relates to a modal enhancement structure of an automobile instrument pipe beam. Background Art

[0002] In recent years, customers have higher and higher requirements for the NVH performance of automobiles, so that the inspection standards for automobile NVH in the early stage of development are constantly improved. In the prior art, the modal of the steering system of the automobile is too low, and the vibration of the steering wheel will be directly transmitted to the hands, giving people the feeling of the steering wheel hitting the hands. In addition, the modal of the instrument panel is too low, which will also cause the overall vibration of the instrument panel and abnormal noises of the accessories inside the instrument panel, all of which will affect the comfort of customers when riding and using the vehicle. Even some customers will think that there are problems with the safety of the automobile, which will lead to a decrease in the competitiveness of the automobile in the market and customer satisfaction.

[0003] The modal of the instrument pipe beam is an important inspection index for automobile NVH. With the improvement of the modal of the instrument pipe beam, the modal of the instrument panel and the steering system will be greatly increased, thereby reducing the risk of overall vibration of the instrument panel or abnormal noises of the accessories inside the instrument panel. Therefore, the modal of the instrument pipe beam plays an important role in improving the NVH performance of automobiles.

[0004] The utility model patent with the publication number of CN110733577A discloses a beam structure and an instrument panel crossbeam assembly on January 31, 2020. The beam structure includes a first beam body and a second beam body arranged in sequence. Among them, the tail end of the first beam body and the head end of the second beam body are staggered and connected by a connecting piece. This beam structure and instrument panel crossbeam assembly also cannot solve the technical problems described above. Utility Model Content

[0005] The purpose of the utility model is to provide a modal enhancement structure of an automobile instrument pipe beam that can improve the modal and NVH performance of the instrument pipe beam and enhance the riding comfort in view of the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] For the modal enhancement structure of the automobile instrument pipe beam, an air-conditioning mounting bracket is provided on the instrument pipe beam, a crossbeam is fixedly connected between the bottoms of the air-conditioning mounting brackets, and the crossbeam is detachably connected with a middle support leg.

[0008] The middle support leg is perpendicular to the crossbeam. A connecting surface is provided in the middle of the crossbeam. The top end of the middle support leg is connected to the connecting surface. The bottom end of the middle support leg is an L-shaped structure. Connecting holes are provided at both the top end and the bottom end of the middle support leg.

[0009] Flanges are provided on both sides of the middle support leg.

[0010] The middle support leg is located below the middle part of the instrument pipe beam.

[0011] The middle support leg is provided with weight-reducing holes.

[0012] Both ends of the instrument pipe beam are provided with pipe beam mounting brackets, and the pipe beam mounting brackets are provided with connecting plates and fastening bolts.

[0013] The instrument pipe beam is further provided with a central control screen bracket, a mounting bracket on the steering system, and a front support leg, and the mounting bracket on the steering system and the front support leg are both provided with weight-reducing holes.

[0014] The instrument pipe beam is of a circular pipe structure.

[0015] The technical effect of the present utility model is as follows: By adopting the modal enhancement structure of the automotive instrument pipe beam of the present utility model, a middle support leg is added to the instrument pipe beam assembly, and the middle support leg is reasonably designed, so as to improve the bending mode of the instrument pipe beam, and further improve the modes of the steering system and the instrument panel, solve the problems of steering wheel hitting hands and abnormal noises inside the instrument panel, improve the NVH performance of the vehicle, and ensure the riding comfort of users; among them, the middle support leg has a simple structure, convenient assembly, little influence on surrounding components, a compact structure, low cost, and is convenient for application and implementation. Description of the Drawings

[0016] This specification includes the following drawings, and the shown contents are respectively:

[0017] Figure 1 is a schematic structural diagram of the automotive instrument pipe beam of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the middle support leg of the present utility model.

[0019] The marks in the figure are: 1, instrument pipe beam; 2, air conditioner mounting bracket; 3, cross beam; 4, pipe beam mounting bracket; 5, middle support leg; 6, central control screen bracket; 7, mounting bracket on the steering system; 8, front support leg; 9, flanging; 10, connecting surface; 11, connecting hole; 12, fastening bolt; 13, weight-reducing hole; 14, connecting plate. Detailed Embodiment

[0020] The following is a further detailed description of the specific embodiments of the present utility model by referring to the drawings and describing the embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and contribute to its implementation.

[0021] As Figure 1 and Figure 2As shown in the figure, for the modal enhancement structure of the automotive instrument pipe beam, an air-conditioning mounting bracket 2 is provided on the instrument pipe beam 1. A cross beam 3 is fixedly connected between the bottoms of the air-conditioning mounting brackets 2, and the cross beam 3 is detachably connected with a middle support leg 5.

[0022] Adding the cross beam 3 to the air-conditioning mounting bracket 2 not only improves the overall performance of the air-conditioning mounting bracket 2, but also provides an installation position for the connection of the middle support leg 5, making full use of the existing bracket structure on the instrument pipe beam 1 and reducing the impact on surrounding components; adding the middle support leg 5 and connecting it to the instrument pipe beam 1 by screwing has a simple structure and is convenient for disassembly, and can meet the assembly requirements of vehicle models with limited layout space (such as A0-class sedans). After verification on a real vehicle, it does not affect the NVH performance of the vehicle. The bottom of the middle support leg 5 is used to connect to the vehicle body floor, forming an indirect connection between the instrument pipe beam 1 and the vehicle body floor, providing support and restraint to the instrument pipe beam 1, increasing the first-order natural frequency of the instrument pipe beam 1, making its natural frequency avoid the engine / road excitation frequency, and reducing the resonance caused by engine excitation or road excitation, so as to reduce the impact of vibration on the instrument panel and its components or the steering system.

[0023] As Figure 1 and Figure 2 shown in the figure, the middle support leg 5 is vertically arranged with respect to the cross beam 3. A connection surface 10 is provided in the middle of the cross beam 3. The top end of the middle support leg 5 is connected to the connection surface 10. The bottom end of the middle support leg 5 is of an L-shaped structure, and connection holes 11 are provided at both the top end and the bottom end of the middle support leg 5. The cross beam 3 is parallel to the instrument pipe beam 1, and the middle support leg 5 is perpendicular to the cross beam 3, which is beneficial to reducing the length of the middle support leg 5, making the structure compact and convenient for layout; the connection surface 10 provides a connection position for the bolts at the top end of the middle support leg 5. Making the bottom of the middle support leg 5 into an L-shape enables the bolts connected to the top end and the bottom end of the middle support leg 5 to be in the X and Z directions of the vehicle body coordinate system respectively, forming a multi-directional connection to the middle support leg 5 and improving the connection stability.

[0024] As Figure 2 shown in the figure, flanges 9 are provided on both sides of the middle support leg 5. The setting of the flanges 9 changes the shape and stress distribution of the edge of the sheet metal part of the middle support leg 5, increases the stiffness of the middle support leg 5, enables it to bear greater loads, and helps to improve the modal of the middle support leg 5.

[0025] As Figure 1 shown in the figure, the middle support leg 5 is located below the middle of the instrument pipe beam 1. The left / right pipe beam mounting brackets 4 of the instrument pipe beam 1 fix both ends of the instrument pipe beam 1, and the middle support leg 5 provides support to the middle of the instrument pipe beam 1. The above structure ensures the uniformity of the modal improvement of the instrument pipe beam 1.

[0026] As Figure 2As shown, there are weight reduction holes 13 on the middle support leg 5. The multiple weight reduction holes 13 further reduce the weight of the middle support leg 5, meeting the lightweight design of the vehicle.

[0027] As Figure 1 shown, pipe beam mounting brackets 4 are provided at both ends of the instrument pipe beam 1. Connecting plates 14 and fastening bolts 12 are provided on the pipe beam mounting brackets 4. There are two connecting plates 14, which are respectively located at the top and side of the pipe beam mounting brackets 4. The two connecting plates 14 have different inclination directions, providing better stability for the fixation of both ends of the instrument pipe beam 1. The fastening bolts 12 realize the connection of the instrument pipe beam 1 to the vehicle body in the X direction.

[0028] As Figure 1 shown, a central control screen bracket 6, a mounting bracket 7 for the steering system, and a front support leg 8 are also provided on the instrument pipe beam 1. Weight reduction holes 13 are provided on both the mounting bracket 7 for the steering system and the front support leg 8. Bracket for installing the central control screen and the steering system are also provided on the instrument pipe beam 1, making full use of the installation space of the instrument pipe beam 1. The left / right pipe beam mounting brackets 4, the front support leg 8, and the left / right pipe beam mounting brackets 4 for the air conditioner of the instrument pipe beam 1 form a small assembly through the connection method of CO2 shielded welding and then are connected to the vehicle body. The mounting bracket 7 for the steering system and the front support leg 8 are arranged oppositely on the instrument pipe beam 1, and multiple weight reduction holes 13 are provided on both of them to further reduce the overall weight of the instrument pipe beam 1.

[0029] As Figure 1 shown, the instrument pipe beam 1 is of a circular pipe structure. The instrument pipe beam 1 adopts a circular pipe, with low material cost. Appropriately increasing the wall thickness can improve its stiffness, thereby increasing the modal frequency.

[0030] Considering from the overall structure, the modal enhancement structure of the vehicle instrument pipe beam changes the assembly structure of the instrument pipe beam 1 by adding the middle support leg 5, not only improving the bending mode of the instrument pipe beam 1, but also laying a foundation for the improvement of the steering system mode and the instrument panel mode. At the same time, it also improves the first-order overall mode of the instrument panel and the mode of the steering system, reduces the risk of abnormal noise of the instrument panel and the accessories inside the instrument panel, reduces the risk of the steering wheel being damaged by vibration caused by engine excitation or road surface excitation, reduces the risk of the steering wheel hitting the hand, improves the anti-risk ability, thus effectively improving the NVH performance of the instrument pipe beam 1 assembly, and also greatly reducing the cost and weight. After verification, the bending mode of the instrument pipe beam 1 has increased by 80%, the first-order overall mode of the instrument panel has increased by 10%, and the first-order mode of the steering system has increased by 10%.

[0031] The modal enhancement structure of the vehicle instrument crossbeam improves the bending mode of the instrument crossbeam 1 by adding a middle support leg 5 to the instrument crossbeam 1 assembly and reasonably designing the middle support leg 5, thereby improving the modes of the steering system and the instrument panel, solving the problems of steering wheel hitting the hands and abnormal noise inside the instrument panel, improving the NVH performance of the vehicle, and ensuring the riding comfort of users; among them, the middle support leg 5 has a simple structure, is convenient to assemble, has little influence on surrounding components, is compact in structure, and has low cost, which is convenient for application and implementation.

[0032] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. An automotive instrument pipe beam modal enhancement structure, characterized in that: An air-conditioning mounting bracket (2) is provided on the instrument pipe beam (1). A cross beam (3) is fixedly connected between the bottoms of the air-conditioning mounting brackets (2). The cross beam (3) is detachably connected to a middle support leg (5).

2. The modal enhancement structure of the automotive instrument beam according to claim 1, wherein: The middle support leg (5) is perpendicular to the cross beam (3). A connecting surface (10) is provided in the middle of the cross beam (3). The top end of the middle support leg (5) is connected to the connecting surface (10). The bottom end of the middle support leg (5) is of an L-shaped structure. Connecting holes (11) are provided at both the top end and the bottom end of the middle support leg (5).

3. The modal enhancement structure of the automotive instrument beam according to claim 2, characterized in that: Flanges (9) are provided on both sides of the middle support leg (5).

4. The modal enhancement structure of the automotive instrument beam according to claim 3, wherein: The middle support leg (5) is located below the middle of the instrument pipe beam (1).

5. The modal enhancement structure of the automotive instrument beam according to claim 4, characterized in that: Weight-reducing holes (13) are provided on the middle support leg (5).

6. The modal enhancement structure of the vehicle instrument beam according to any one of claims 1-5, characterized in that: Pipe beam mounting brackets (4) are provided at both ends of the instrument pipe beam (1). A connecting plate (14) and fastening bolts (12) are provided on the pipe beam mounting brackets (4).

7. The modal enhancement structure of the automotive instrument pipe beam according to claim 6, characterized in that: A central control screen bracket (6), a mounting bracket on the steering system (7) and a front support leg (8) are further provided on the instrument pipe beam (1). Weight-reducing holes (13) are provided on both the mounting bracket on the steering system (7) and the front support leg (8).

8. The modal enhancement structure of the automotive instrument beam according to claim 7, wherein: The instrument pipe beam (1) is of a circular pipe structure.

Images