Sound absorption test tool

Abstract

The utility model provides a sound absorption test tool. The device comprises a frame and a supporting frame, the supporting frame is movably arranged in the frame and used for supporting a test piece, multiple sets of supporting parts are arranged on the inner frame wall of the frame, the multiple sets of supporting parts are distributed at intervals in the circumferential direction and used for supporting of the supporting frame, and each set of supporting part comprises multiple supporting protruding blocks; the multiple supporting protruding blocks are arranged at intervals in the vertical direction, the supporting frame is arranged on the supporting protruding blocks in a pressed mode, the height of the cavity can be rapidly adjusted to simulate a real vehicle, operation is convenient, and the height of the cavity does not need to be adjusted by manually increasing or decreasing the number of the supporting protruding blocks each time.

Description

Technical Field

[0001] The utility model relates to the technical field of material sound absorption testing, in particular to a sound absorption testing tool. Background Art

[0002] The rapid development of automobiles has provided more convenience to people's lives, and has also put forward higher requirements for the automobile manufacturing industry. The sound absorption effect of automobile materials is one of the criteria for users to measure whether they are satisfied with the car. Testing is an indispensable part of the automobile manufacturing process, which can effectively identify whether the quality of the car meets the standards and whether the parameters are accurate. In the process of testing, in addition to the characteristics of the material itself, the state of external test adjustment during the test will also greatly affect the data after the test. When conducting Alpha Cabin sound absorption tests on flat materials such as ceilings, cotton felts, and fiberglass boards, since the above-mentioned materials are not in direct contact with the body sheet metal when installed in the actual vehicle, it is often necessary to add a certain thickness of cavity height under the sample to simulate the actual vehicle when conducting sound absorption experiments. The existing method usually uses manual adjustment of the cavity height to simulate the actual vehicle, which is time-consuming and labor-intensive and very inconvenient. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing method of adjusting the cavity height usually adopts manual adjustment, which is time-consuming and labor-intensive. In order to overcome the defects of the above prior art, the utility model provides a sound absorption test tool.

[0004] The utility model provides a sound absorption test tool, comprising a frame and a support frame, wherein the support frame is movably arranged inside the frame and used for supporting a test piece, a plurality of groups of support parts are arranged on the inner frame wall of the frame, the plurality of groups of support parts are distributed at intervals along the circumferential direction and used for supporting the support frame, each group of the support parts comprises a plurality of support protrusions, the plurality of support protrusions are arranged at intervals along the vertical direction, and the support frame is pressed on the support protrusions.

[0005] Compared with the prior art, the sound absorption test tooling of the present application has the following advantages: under the action of multiple support protrusions arranged at vertical intervals on the inner frame wall, the height of the cavity can be quickly adjusted to simulate a real vehicle by adjusting the support frame according to the height required by the material characteristics and placing the support frame on the support protrusions of the corresponding height. The operation is convenient and there is no need to manually increase or decrease the support protrusions to adjust the cavity height each time.

[0006] In a possible implementation manner, the supporting protrusion is integrally connected to the inner frame wall of the frame.

[0007] Compared with the prior art, the above technical solution can avoid the sliding of the support protrusions before and after the installation of the samples when testing multiple groups of parallel samples under the action of the support protrusions being integrally connected to the inner frame wall of the frame, thereby improving the stability of the test; and the integrated connection also makes the tooling easy to operate, the overall structure is simpler, and storage is more convenient.

[0008] In a possible implementation manner, vertical projections of the plurality of support protrusions of each group of the support parts are separated from each other.

[0009] Compared with the prior art, the above-mentioned technical solution can facilitate the placement of the support frame from one support protrusion to another when adjusting the placement height of the support frame, thereby avoiding the mutual influence between the support protrusions due to their positions, resulting in jamming and friction when the support frame switches to other support protrusions, thereby causing wear on the surface of the tooling.

[0010] In a possible implementation, the support frame includes a plurality of support rods, and the plurality of support rods are arranged to intersect each other vertically and horizontally to form a mesh structure.

[0011] Compared with the prior art, the above technical solution can improve the stability of the test piece placed on the support frame and provide better support for the test piece.

[0012] In a possible implementation, the distance between two longitudinally adjacent support rods is no greater than 200 mm, and the distance between two transversely adjacent supports is no greater than 200 mm.

[0013] Compared with the prior art, the above technical solution can achieve a more balanced force when the support frame bears the weight of the test piece, so that the test piece can be placed evenly on the support frame, avoiding the situation where the test piece is suspended over a larger area due to excessive spacing, thereby causing the test piece to be placed unsteadily due to gravity.

[0014] In a possible implementation, the support frame further includes a plurality of support surface blocks arranged in the same plane as the support frame, and the plurality of support surface blocks are arranged at intervals from each other.

[0015] Compared with the prior art, the above technical solution can ensure that the test piece does not collapse under the condition of a large force-bearing area of ​​the supporting surface block, and effectively support the test piece, thereby improving the test accuracy and reducing the test error caused by the difference in surface flatness.

[0016] In a possible implementation manner, the supporting surface block is a square surface block, and the side length of the square surface block is not greater than 100 mm.

[0017] Compared with the prior art, the above technical solution can better improve the overall supporting strength of the support frame.

[0018] In a possible implementation, a plurality of the support rods are integrally connected to a plurality of support surface blocks.

[0019] Compared with the prior art, the above technical solution can simplify the operation process, is easy to arrange and has stable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 , Figure 2 It is a schematic diagram of the overall structure of the sound absorption test tooling of the utility model at different angles;

[0021] Figure 3 This is a schematic diagram of the structure of the support protrusion of the sound absorption test tooling frame of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the sound absorption test tooling support frame of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the support surface block of the sound absorption test tooling of the utility model.

[0024] Description of reference numerals:

[0025] 1. Frame; 11. Support part; 111. Support protrusion; 2. Support frame; 21. Support rod; 22. Mesh structure; 23. Support surface block. DETAILED DESCRIPTION

[0026] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0027] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0028] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figures 1 to 4 The embodiment of the present application discloses a sound absorption test fixture. Specifically, it includes a frame 1 and a support frame 2, the support frame 2 is movably arranged inside the frame 1 and used to support the test piece, and four groups of support parts 11 are arranged on the inner frame wall of the frame 1, and the four groups of support parts 11 are distributed at intervals along the circumference and used to support the support frame 2, each group of the support parts 11 includes a plurality of support protrusions 111, and the plurality of support protrusions 111 are arranged at intervals along the vertical direction, and the support frame 2 is pressed on the support protrusions 111. One circle of the frame 1 is the circumferential direction, and the direction perpendicular to the plane where the frame 1 is located is the vertical direction.

[0031] In order to improve the stability of the test and avoid sliding of the support protrusions 111 before and after the sample is installed when testing four sets of parallel samples, the support protrusions 111 are integrally connected to the inner frame wall of the frame 1.

[0032] To prevent the three supporting protrusions 111 from influencing each other due to their positions and the support frame 2 from being placed from one supporting protrusion 111 to another supporting protrusion 111 , the vertical projections of the multiple supporting protrusions 111 of each group of the supporting parts 11 are separated from each other.

[0033] As can be known from the above, when using the present sound absorption test fixture, the test piece is placed on the support frame 2, and the required cavity height is adjusted according to the material properties of the test piece to adjust the height of the support frame 2 in the movable setting frame 1. The height of the support frame 2 is adjusted by four groups of support parts 11 provided on the inner wall of the frame 1. Each support part 11 includes three support protrusions 111. The three support protrusions 111 are vertically spaced on the frame 1, and cavity heights of 10mm, 20mm, 30mm, and 40mm are set for selection according to the distance from the ground. The cavity height can be adjusted by simply placing the support frame 2 from one support protrusion 111 to another support protrusion 111, thereby realizing rapid positioning to simulate a real vehicle and easy operation. There is no need to manually increase or decrease the support protrusions 111 to adjust the cavity height each time.

[0034] See also Figure 4 In this embodiment, the support frame 2 includes a plurality of support rods 21 , and the plurality of support rods 21 are arranged to intersect each other vertically and horizontally to form a mesh structure 22 , thereby improving the stability of the test piece placed on the support frame 2 .

[0035] Continue to see Figure 4 In this embodiment, the distance between two longitudinally adjacent support rods 21 is not greater than 200 mm, and the distance between two laterally adjacent supports is not greater than 200 mm, thereby achieving better force on the support frame 2 and placing the test piece evenly on the support frame 2.

[0036] See also Figure 4 and Figure 5 The support frame 2 also includes a plurality of support surface blocks 23 arranged on the same plane as the support frame 2. The plurality of support surface blocks 23 are arranged at intervals from each other, thereby ensuring that the test piece does not collapse, thereby improving the test accuracy and reducing the test error caused by the difference in surface flatness.

[0037] Continue to see Figure 4 and Figure 5 The support surface block 23 is a square surface block, and the side length of the square surface block is not greater than 100 mm, thereby improving the overall support strength of the support frame 2.

[0038] See also Figures 1 to 4 The plurality of support rods 21 are integrally connected with the plurality of support surface blocks 23, thereby simplifying the operation process, making the arrangement simple and the installation stable.

[0039] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0040] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A sound absorption test tool, characterized in that: The invention comprises a frame (1) and a support frame (2), wherein the support frame (2) is movably arranged inside the frame (1) and is used to support a test piece, and a plurality of groups of support parts (11) are arranged on the inner frame wall of the frame (1), and the plurality of groups of support parts (11) are distributed at intervals along the circumference and are used to support the support frame (2), and each group of the support parts (11) comprises a plurality of support protrusions (111), and the plurality of support protrusions (111) are arranged at intervals along the vertical direction, and the support frame (2) is pressed onto the support protrusions (111).

2. The sound absorption test tooling according to claim 1, characterized in that: The supporting protrusion (111) is integrally connected to the inner frame wall of the frame (1).

3. The sound absorption test tooling according to claim 2, characterized in that: The projections of the multiple supporting protrusions (111) of each group of the supporting parts (11) in the vertical direction are separated from each other.

4. The sound absorption test tooling according to claim 1, characterized in that: The support frame (2) comprises a plurality of support rods (21), and the plurality of support rods (21) are arranged in an integrated manner so as to intersect each other vertically and horizontally to form a mesh structure (22).

5. The sound absorption test tooling according to claim 4, characterized in that: The distance between two longitudinally adjacent support rods (21) is no greater than 200 mm, and the distance between two transversely adjacent support rods is no greater than 200 mm.

6. The sound absorption test tooling according to claim 4, characterized in that: The support frame (2) further comprises a plurality of support surface blocks (23) arranged on the same plane as the support frame (2), and the plurality of support surface blocks (23) are arranged at intervals from each other.

7. The sound absorption test tooling according to claim 6, characterized in that: The supporting surface block (23) is a square surface block, and the side length of the square surface block is not greater than 100 mm.

8. The sound absorption test tooling according to claim 6, characterized in that: The plurality of support rods (21) are integrally connected to the plurality of support surface blocks (23).

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