A device for detecting the sound insulation performance of a vehicle body

Abstract

This utility model provides a vehicle body sound insulation performance testing device, including two mounting brackets for respectively mounting on both sides of a vehicle. Each mounting bracket includes a vertical support frame and a horizontal mounting component. The horizontal mounting component is detachably connected to the upper end of the vertical support frame. Four equally spaced tube clamps are connected to the horizontal mounting component, and each of the four tube clamps holds a microphone, the microphone being horizontally adjustable within the tube clamps. The vehicle body sound insulation performance testing device disclosed in this utility model has a robust structure, enables accurate microphone positioning, and allows for microphone position adjustment, ensuring testing accuracy and improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle performance testing technology, and more specifically, to a vehicle body sound insulation performance testing device. Background Technology

[0002] With the development of automotive technology, consumers have increasingly higher demands for the sensory quality of cars. Passengers have higher requirements for driving comfort. Most passengers hope to enjoy in-car voice communication and audio entertainment systems while driving, therefore, they pay more attention to the sound insulation of vehicles when purchasing them. As an important indicator for evaluating handling and comfort, vibration and noise are receiving increasing attention. According to different mechanisms of noise generation, in-car noise can be divided into structurally transmitted noise and airborne noise. The noise radiated by the engine and tires during operation and transmitted into the car falls into the category of airborne noise. In addition to the two types of noise mentioned above, the noise generated by wind resistance during car operation (wind noise) also affects the comfort of passengers.

[0003] The whole-vehicle PBNR (Power Based Noise Reduction) test measures the sound insulation performance of a vehicle by placing microphones outside the vehicle and sound sources inside the vehicle, utilizing the reciprocity of sound. This is a reverse testing system because sound transmission is mutual; sound traveling from inside the vehicle to the outside has the same effect as sound traveling from the outside to the inside, thus reflecting the vehicle's sound insulation performance. In actual testing, according to relevant standards, four microphones are typically placed on each side of the vehicle body, with each microphone 1 meter away from the outer wall of the vehicle body and 1 meter above the ground, and adjacent microphones spaced 50 cm apart.

[0004] In existing technologies, microphones are typically fixed using a simple frame setup. This involves connecting a horizontal bar between the support poles of two tripods, and then fixing four microphones at equal intervals along the horizontal bar. The microphones are secured to the horizontal bar with tape, and the microphone positions are difficult to adjust after fixing. This existing testing device is relatively simple, has low microphone positioning accuracy, and the horizontal bar is prone to deformation after prolonged use. Therefore, the microphone positions need to be checked and adjusted before each test, which seriously affects testing efficiency and accuracy. Utility Model Content

[0005] To overcome at least one of the defects in the prior art, this utility model provides a vehicle body sound insulation performance testing device with a robust structure, capable of accurate microphone positioning, and the microphone position can be adjusted to ensure testing accuracy and improve testing efficiency.

[0006] The technical solution adopted by this utility model is to provide a vehicle body sound insulation performance testing device, including two mounting brackets for being respectively installed on both sides of the vehicle. Each mounting bracket includes a vertical support frame and a horizontal mounting component. The horizontal mounting component is detachably connected to the upper end of the vertical support frame. Four equally spaced tube clamps are connected to the horizontal mounting component. Each of the four tube clamps contains a microphone, and the microphone can be horizontally adjusted within the tube clamp.

[0007] Compared with the prior art, the vehicle body sound insulation performance testing device of this utility model has the following advantages: This utility model discloses a vehicle body sound insulation performance testing device, which is a specialized tooling. It includes a dedicated mounting frame with a vertical support and a horizontal mounting component. The horizontal mounting component is detachably connected to the upper end of the vertical support. Four equally spaced tube clamps are connected to the horizontal mounting component, with a distance of 50cm between adjacent clamps. Each of the four clamps holds a microphone, securing the microphone for stability and allowing for easy assembly and disassembly. The microphones can be horizontally adjusted within the clamps. Since the outer walls of the vehicle body are not perfectly flat and have a certain height difference, after confirming the mounting frame position, the microphones need to be appropriately adjusted to ensure that each microphone is 1m away from the outer wall, thus guaranteeing testing accuracy.

[0008] Furthermore, the vertical support frame includes three support columns and three fixed bases, with the lower ends of the three support columns detachably connected to the three fixed bases respectively; the horizontal mounting component is detachably connected to the upper ends of the three support columns.

[0009] As an improvement, the upper end of the fixed base is recessed and provided with a positioning groove, and the lower end of the support column is inserted into the positioning groove; a fixing bolt is passed through the lower end of the fixed base and is connected to the bottom of the support column.

[0010] Furthermore, the horizontal mounting component includes a first mounting crossbar and a second mounting crossbar, and three supporting columns are designated as the first supporting column, the second supporting column, and the third supporting column. One end of the first mounting crossbar is fixed to the upper end of the first supporting column, and the other end is fixed to the upper end of the second supporting column. One end of the second mounting crossbar is fixed to the upper end of the second supporting column, and the other end is fixed to the upper end of the third supporting column. The first mounting crossbar and the second mounting crossbar are located on the same horizontal plane and are distributed in a straight line.

[0011] Preferably, the two mounting crossbars and three supporting columns are made of aluminum profiles with the same structure.

[0012] In a further improvement, both ends of the first and second mounting crossbars are detachably connected to the upper ends of the three supporting columns via angle brackets.

[0013] In a further improvement, the aluminum profile has a square cross-section, and mounting grooves are formed on all four sides of the aluminum profile; two mounting blocks are connected in the mounting grooves on the upper surfaces of the first and second mounting crossbars, and the distance between any two adjacent mounting blocks is the same; the four pipe clamps are detachably fixed to the four mounting blocks respectively.

[0014] The mounting block is an inverted T-shaped block. Mounting holes are provided at both ends of the horizontal part of the T-shaped block. An inverted T-bolt is connected to each mounting hole. The bolt head of each T-bolt is accommodated in the mounting groove. A nut is connected to one end of each T-bolt that protrudes from the horizontal part. The open end of the pipe clamp is connected to the vertical part of the T-shaped block by bolts.

[0015] The various advantages and improvements of this invention will be set forth in detail in the following specific description, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and drawings. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of one side of the vehicle body sound insulation performance testing device of this utility model; Figure 2 This is an exploded view of the connection structure between the mounting crossbar and the supporting column in this utility model; Figure 3 This is an exploded view of the connection structure between the supporting column and the fixed base in this utility model; Figure 4 This is an exploded view of the connection structure between the pipe clamp and the mounting crossbar in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Pipe clamp; 2. Microphone; 3. Support column; 4. Fixed base; 5. First mounting crossbar; 6. Second mounting crossbar; 7. Angle bracket; 8. Mounting slot; 9. Mounting block; 10. T-bolt; 11. Nut; 12. Fixing bolt; 13. Positioning slot. Detailed Implementation

[0018] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application based on the specific circumstances.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] See Figures 1-4 As shown in the illustration, this application discloses a vehicle body sound insulation performance testing device, including two mounting brackets for respectively mounting on both sides of the vehicle. The two mounting brackets have identical structures, each including a vertical support frame and a horizontal mounting component. The horizontal mounting component is detachably connected to the upper end of the vertical support frame, and four equally spaced tube clamps 1 are connected to the horizontal mounting component. In this embodiment, the distance between two adjacent tube clamps 1 is 50cm. Each of the four tube clamps 1 contains a microphone 2, and the microphone 2 can be horizontally adjusted within the tube clamp 1. Since the outer walls on both sides of the vehicle body are not completely flat and have a certain height difference, in order to ensure that each microphone 2 is at the same distance from the outer wall of the vehicle body, after the mounting bracket positions are confirmed, the positions of each microphone 2 need to be appropriately adjusted to ensure that the distance between each microphone 2 and the outer wall of the vehicle body is 1m.

[0022] In this embodiment, the vertical support frame includes three support columns 3 and three fixed bases 4. The lower ends of the three support columns 3 are detachably connected to the three fixed bases 4. Specifically, a fixing bolt 12 is inserted from bottom to top through the middle of the fixed base 4, and a threaded hole for connecting the fixing bolt 12 is provided at the bottom of the support column 3. Furthermore, a recessed positioning groove 13 is provided at the upper end of the fixed base 4, and the lower end of the support column 3 is inserted into the positioning groove 13, further improving the stability of the connection structure between the support column 3 and the fixed base 4.

[0023] Additionally, the horizontal mounting component is detachably connected to the upper ends of the three support columns 3. Specifically, the horizontal mounting component includes a first mounting crossbar 5 and a second mounting crossbar 6. The three support columns 3 are designated as the first support column 3, the second support column 3, and the third support column 3. One end of the first mounting crossbar is fixed to the upper end of the first support column 3, and the other end is fixed to the upper end of the second support column 3. One end of the second mounting crossbar 6 is fixed to the upper end of the second support column 3, and the other end is fixed to the upper end of the third support column 3. The first mounting crossbar 5 and the second mounting crossbar 6 are located on the same horizontal plane and are distributed in a straight line.

[0024] In this embodiment, preferably, the two mounting crossbars and the three supporting columns 3 have the same structure, all made of aluminum profiles, which are high in strength and lightweight. More specifically, the aluminum profiles have a square cross-section, and mounting grooves 8 are formed on all four sides of the aluminum profiles. These mounting grooves 8 are actually process grooves formed during the aluminum profile forming process, which can not only be used for concealed connection of fasteners, but also reduce the weight of the aluminum profiles.

[0025] On the other hand, see Appendix Figure 4 In the above structure, two mounting blocks 9 are connected to the mounting grooves 8 on the upper surfaces of the first mounting crossbar 5 and the second mounting crossbar 6, and the distance between any two adjacent mounting blocks 9 is the same. The four pipe clamps 1 are detachably fixed to the four fixed bases 4. Preferably, the mounting block 9 is an inverted T-shaped block. The horizontal part of the T-shaped block has mounting holes at both ends, and each mounting hole is connected to an inverted T-bolt 10. The bolt head of each T-bolt 10 is accommodated in the mounting groove 8, and a nut 11 is connected to one end of each T-bolt 10 that protrudes from the horizontal part. The open end of the pipe clamp 1 is connected to the vertical part of the T-shaped block by bolts. Specifically, a connecting hole is provided on the vertical part, and the two wall plates of the open end of the pipe clamp 1 are located on both sides of the vertical part and are fixed by bolts passing through the connecting hole.

[0026] In this structure, the T-bolt 10 is fixed by means of the mounting groove 8 on the aluminum profile. During installation, the bolt head of the T-bolt 10 slides into the aluminum profile from the end along the mounting end opening until it slides to the set position and is locked by the nut 11, which is very convenient. The aluminum profile will not be damaged during the connection process. In addition, this connection method can also make the mounting block 9 flexibly adjustable and fixed on the mounting crossbar.

[0027] In the above structure, the two ends of the first mounting crossbar 5 and the second mounting crossbar 6 are detachably connected to the upper ends of the three supporting columns 3 via angle brackets 7. The connection method between the angle brackets 7 and the mounting crossbars and supporting columns 3 is also the same as that of T-bolts 10 and nuts 11, which is the same as the fixing method of the aforementioned mounting block 9, and will not be described again here. After the test is completed, the angle brackets 7 can be removed to separate the crossbars from the columns, making them easy to store and not taking up too much storage space.

[0028] In some other embodiments, self-tapping screws can be directly inserted into the mounting holes of the T-block and fixed in the mounting groove 8 on the mounting crossbar by the self-tapping screws. This method will damage the outer surface of the aluminum profile.

[0029] In the description of this application, the references to terms such as "this embodiment," "some embodiments," 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 this application. In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any 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] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle body sound insulation performance testing device, characterized in that: It includes two mounting brackets for respectively setting on both sides of the vehicle. Each mounting bracket includes a vertical support frame and a horizontal mounting component. The horizontal mounting component is detachably connected to the upper end of the vertical support frame. Four equally spaced tube clamps (1) are connected to the horizontal mounting component. Each of the four tube clamps (1) contains a microphone (2), and the microphone (2) can be horizontally adjusted within the tube clamps (1).

2. The vehicle body sound insulation performance testing device according to claim 1, characterized in that: The vertical support frame includes three support columns (3) and three fixed bases (4). The lower ends of the three support columns (3) are detachably connected to the three fixed bases (4). The horizontal mounting component is detachably connected to the upper ends of the three support columns (3).

3. The vehicle body sound insulation performance testing device according to claim 2, characterized in that: The fixed base (4) has a recessed positioning groove (13) at its upper end, and the lower end of the support column (3) is inserted into the positioning groove (13); the lower end of the fixed base (4) is provided with a fixing bolt (12), and the fixing bolt (12) is connected to the bottom of the support column (3).

4. The vehicle body sound insulation performance testing device according to claim 2, characterized in that: The horizontal mounting components include a first mounting crossbar (5) and a second mounting crossbar (6), and three supporting columns (3) are designated as the first supporting column, the second supporting column, and the third supporting column. One end of the first mounting crossbar (5) is fixed to the upper end of the first supporting column, and the other end is fixed to the upper end of the second supporting column. One end of the second mounting crossbar (6) is fixed to the upper end of the second supporting column, and the other end is fixed to the upper end of the third supporting column. The first mounting crossbar (5) and the second mounting crossbar (6) are located on the same horizontal plane and are distributed in a straight line.

5. The vehicle body sound insulation performance testing device according to claim 4, characterized in that: The two mounting crossbars and the three supporting columns (3) are made of aluminum profiles with the same structure.

6. The vehicle body sound insulation performance testing device according to claim 5, characterized in that: The first mounting crossbar (5) and the second mounting crossbar (6) are detachably connected to the upper ends of the three supporting columns (3) via corner brackets (7).

7. The vehicle body sound insulation performance testing device according to claim 5, characterized in that: The aluminum profile has a square cross-section and mounting grooves (8) are formed on all four sides of the aluminum profile. Two mounting blocks (9) are connected in the mounting grooves (8) on the upper surfaces of the first mounting crossbar (5) and the second mounting crossbar (6), and the distance between any two adjacent mounting blocks (9) is the same. The four pipe clamps (1) are detachably fixed on the four mounting blocks (9).

8. The vehicle body sound insulation performance testing device according to claim 7, characterized in that: The mounting block (9) is an inverted T-shaped block. Both ends of the horizontal part of the T-shaped block are provided with mounting holes. Each mounting hole is connected to an inverted T-shaped bolt (10). The bolt head of each T-shaped bolt (10) is accommodated in the mounting groove (8). One end of each T-shaped bolt (10) that protrudes from the horizontal part is connected to a nut (11). The open end of the pipe clamp (1) is connected to the vertical part of the T-shaped block by bolts.

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