An auxiliary tool for testing the sound insulation of a whole vehicle

Abstract

The utility model discloses an auxiliary tool for whole vehicle sound insulation quantity test for automobile belongs to automobile noise test auxiliary tool technical field, and includes fixed base and vertical fixed on its fixed pillar, be provided with at least one fixed clamp on the fixed pillar, and fixed clamp is locked in the predetermined height position of fixed pillar through locking piece, be provided with at least one sliding clamp block of sliding sleeve on the fixed clamp, and the sliding clamp block is used for clamping microphone. The auxiliary tool for whole vehicle sound insulation quantity test for automobile has overcome the problem of long test preparation time, low efficiency, low microphone position precision, and improved the accuracy and efficiency of whole vehicle sound insulation quantity test.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary tooling for automotive noise testing, specifically relating to an auxiliary tooling for testing the sound insulation of a complete vehicle. Background Technology

[0002] In the automotive industry, NVH refers to an important performance indicator. N (Noise) refers to unwanted sounds generated during vehicle operation, such as engine noise, tire noise, and wind noise.

[0003] V (Vibration): The vibration phenomenon of components such as the car body, steering wheel, and seats.

[0004] H (Harshness): Describes the discomfort caused by vibration and noise, commonly known as "roughness." It is crucial in the automotive industry, directly impacting ride comfort, user experience, product competitiveness, and brand image. With the upgrading of automotive consumption and increasingly refined user demands for quality, ride comfort has become one of the core indicators for measuring vehicle quality, especially the pursuit of cabin quietness, which is driving technological innovation in NVH engineering. Under this trend, OEMs are continuously strengthening systematic research and development of noise and vibration. To meet this technological upgrade demand, noise testing standards in automotive development systems are also continuously improving, with testing methods evolving from single-condition testing to refined evaluation across multiple scenarios and frequency bands. Whole vehicle sound insulation performance (PBNR) is an important test for evaluating the noise shielding performance of a vehicle.

[0005] During the new product development phase, automotive manufacturers need to conduct whole-vehicle sound insulation performance tests. Whole-vehicle sound insulation testing is a crucial aspect of automotive NVH (Noise, Vibration, and Harshness) performance evaluation, used to quantify a vehicle's ability to isolate itself from external noise. It measures the degree of noise attenuation from the outside of the vehicle to the interior, directly impacting ride comfort. During testing, the vehicle is placed in a semi-anechoic chamber. With the vehicle stationary, a sound source capable of controlling the release of a specific frequency and energy is placed inside the vehicle. An array of microphone sensors is positioned outside the vehicle to simultaneously detect a large number of response noises from different locations. The sensors must be positioned at a specific distance from the vehicle. Efficient and precise placement of the microphone sensor array requires specialized testing fixtures.

[0006] Automotive product developers have developed test fixtures with different structures and operating principles for this test. Currently, the common method is to directly fix the microphone sensor to the vehicle body using tape. This method requires calibrating the relative position of the microphone to the vehicle body each time, resulting in long test preparation times, low efficiency, and low microphone positioning accuracy. Alternatively, using other clamp-type fixtures cannot guarantee test accuracy, repeatability, and engineering applicability. They cannot achieve rapid installation and positioning, nor can they protect the integrity of the vehicle. This may lead to large data fluctuations, inability to distinguish noise sources, and extended engineering development cycles. Utility Model Content

[0007] In view of the above-mentioned defects in the existing technology, this utility model provides an auxiliary tooling for testing the sound insulation of a whole vehicle, which overcomes the problems of long test preparation time, low efficiency and low microphone position accuracy, and improves the accuracy and efficiency of the sound insulation test of the whole vehicle.

[0008] This utility model is achieved through the following technical solution:

[0009] An auxiliary tooling for testing the sound insulation of an automotive vehicle includes a fixed base 8 and a fixed support column 7 vertically fixed thereon; at least one fixed clamp is provided on the fixed support column 7, and the fixed clamp is locked at a predetermined height position on the fixed support column 7 by a locking member; at least one sliding clamp is slidably fitted on the fixed clamp, and the sliding clamp is used to hold a microphone.

[0010] Furthermore, a scale is provided on the column body of the fixed support 7.

[0011] Furthermore, the locking element is a bolt, and the fixing clamp is fixed at a predetermined height position on the fixing support 7 by the bolt.

[0012] Furthermore, the fixed support column 7 is provided with a first fixed clamp 5 and a second fixed clamp 6. The first fixed clamp 5 is slidably fitted with a first left sliding clamp 1 and a first right sliding clamp 2, and the second fixed clamp 6 is slidably fitted with a second left sliding clamp 3 and a second right sliding clamp 4.

[0013] Furthermore, the sliding clamp has a square structure, with a first groove at the bottom and a second groove at the top. The first groove is slidably fitted onto the fixed clamp, and the second groove is used to hold the microphone.

[0014] Furthermore, the cross-sections of both the first groove and the second groove are semi-circular.

[0015] Furthermore, the bottom of the fixed support column 7 is vertically fixed to the center of the fixed base 8 by means of screw connection.

[0016] Furthermore, the lower end of the fixed base 8 is provided with four casters 9 for easy movement.

[0017] Compared with the prior art, the advantages of this utility model are as follows:

[0018] This utility model discloses an auxiliary fixture for testing the sound insulation of a complete vehicle. It features a simple structure, is easy and efficient to use, and reduces errors in test data. Equipped with a marking scale and sliding clamp, it allows for customized settings for different microphone testing positions, offering advantages of versatility, flexibility, and precision. The fixture improves testing efficiency and safety, protecting the integrity of the vehicle. Its repeatability ensures testing accuracy. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the structure of an auxiliary tooling for testing the sound insulation of a complete vehicle according to the present invention;

[0021] Figure 2 This is a schematic diagram of the fixing fixture of an auxiliary tooling for testing the sound insulation of a whole vehicle, according to the present invention.

[0022] Figure 3 This is a schematic diagram of the sliding clamp block of an auxiliary tooling for testing the sound insulation of a complete vehicle, according to the present invention.

[0023] Figure 4 This is a first working schematic diagram of an auxiliary tooling for testing the sound insulation of a complete vehicle according to the present invention.

[0024] Figure 5 This is a second working schematic diagram of an auxiliary tooling for testing the sound insulation of a complete vehicle according to the present invention;

[0025] In the diagram: First left sliding clamp 1, First right sliding clamp 2, Second left sliding clamp 3, Second right sliding clamp 4, First fixed clamp 5, Second fixed clamp 6, Fixed support column 7, Fixed base 8, Universal wheel 9. Detailed Implementation

[0026] To clearly and completely describe the technical solution and its specific working process of this utility model, the specific embodiments of this utility model are as follows, in conjunction with the accompanying drawings:

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] Example 1

[0031] like Figure 1 As shown, this utility model provides an auxiliary tooling for testing the sound insulation of an automotive vehicle, including a fixed base 8 and a fixed support column 7 vertically fixed thereon; at least one fixed clamp is provided on the fixed support column 7, and the fixed clamp is locked at a predetermined height position on the fixed support column 7 by a locking member; at least one sliding clamp is slidably fitted on the fixed clamp, and the sliding clamp is used to clamp a microphone.

[0032] The fixed support 7 is equipped with a scale; the height can be adjusted according to the scale position during testing, or it can be used directly after changing vehicles. Alternatively, in the case of other vehicle models, the marked position and height can be directly slid for direct use in the next test, improving testing efficiency.

[0033] The locking element is a bolt, and the fixing clamp is fixed at a predetermined height position on the fixing support 7 by the bolt.

[0034] like Figure 2 As shown, the fixed support column 7 is provided with a first fixed clamp 5 and a second fixed clamp 6. The first fixed clamp 5 and the second fixed clamp 6 are triangular in shape, which can improve the stability of the fixation. The first fixed clamp 5 is slidably fitted with a first left sliding clamp 1 and a first right sliding clamp 2, and the second fixed clamp 6 is slidably fitted with a second left sliding clamp 3 and a second right sliding clamp 4.

[0035] like Figure 3 As shown, the sliding clamp has a square structure, with a first groove at the bottom and a second groove at the top, and the first groove and the second groove are orthogonal to each other in space; the first groove is slidably fitted on the fixed clamp, and the second groove is used to clamp the microphone.

[0036] Both the first groove and the second groove have semi-circular cross-sections.

[0037] The bottom of the fixed support column 7 is vertically fixed to the center of the fixed base 8 by screwing.

[0038] The lower end of the fixed base 8 is equipped with four casters 9 for easy movement.

[0039] like Figure 4 and Figure 5 As shown, the working process of the auxiliary tooling for testing the sound insulation of a complete vehicle according to this utility model is as follows:

[0040] First, move the test auxiliary fixture using the bottom casters and secure it to the predetermined test position on the vehicle's perimeter. Then, according to the required test height, adjust the upper and lower fixing clamps to the predetermined positions using the scale on the fixed support, and tighten them with bolts. Next, slide the left and right sliding blocks on each fixing clamp horizontally to precisely position the microphone at its horizontal distance. Finally, clamp and fix the microphone sensor in the groove at the top of the sliding block, and the sound insulation test can be performed.

[0041] After all microphones are installed and positioned, a volumetric sound source with a frequency range of 200-10000Hz is placed in the driver's area, the front passenger area, and the center area of ​​the rear passengers inside the vehicle. The response functions of the sound sources to each response point are processed by energy averaging to obtain the sound insulation performance from the inside of the vehicle to the outside response point.

[0042] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0044] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An auxiliary tooling for testing the sound insulation of an automotive vehicle, characterized in that, It includes a fixed base (8) and a fixed support column (7) vertically fixed thereon; at least one fixed clamp is provided on the fixed support column (7), and the fixed clamp is locked at a predetermined height position on the fixed support column (7) by a locking member; at least one sliding clamp is slidably fitted on the fixed clamp, and the sliding clamp is used to clamp the microphone; The fixed support (7) is provided with a first fixed clamp (5) and a second fixed clamp (6). The first fixed clamp (5) is slidably fitted with a first left sliding clamp (1) and a first right sliding clamp (2). The second fixed clamp (6) is slidably fitted with a second left sliding clamp (3) and a second right sliding clamp (4).

2. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 1, characterized in that, A scale is provided on the body of the fixed support (7).

3. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 1, characterized in that, The locking element is a bolt, and the fixing clamp is fixed to the fixed support (7) at a predetermined height position by the bolt.

4. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 1, characterized in that, The sliding clamp has a square structure with a first groove at the bottom and a second groove at the top. The first groove is slidably fitted onto the fixed clamp, and the second groove is used to hold the microphone.

5. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 4, characterized in that, Both the first groove and the second groove have semi-circular cross-sections.

6. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 1, characterized in that, The bottom of the fixed support column (7) is vertically fixed to the center of the fixed base (8) by screwing.

7. The auxiliary tooling for testing the sound insulation of a complete vehicle as described in claim 1, characterized in that, The bottom of the fixed support column (7) is vertically fixed to the center of the fixed base (8) by screwing.

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