Compression resistance testing device for air guide cavity shell of automobile audio

Abstract

The utility model relates to an automobile audio air guide cavity shell compression resistance testing device, which is characterized in that a testing frame body comprises a top plate and a bottom plate, a pressing plate driving device is arranged on the top plate, a pressing plate is arranged between the top plate and the bottom plate and is driven by the pressing plate driving device to ascend and descend, and a mounting groove is formed in the lower side of the pressing plate; the profile modeling plate is arranged in the mounting groove in a replaceable mode, foam is arranged on the upper side of the air guide cavity shell, when a compression resistance test is carried out, the lower side of the profile modeling plate abuts against the foam, the bottom plate is provided with a plurality of supporting columns and a plurality of supporting column mounting screw holes, and the air guide cavity shell is supported and positioned through the supporting columns. The lower ends of the supporting columns are installed in the corresponding supporting column installation screw holes respectively, a control and display module is arranged on the top plate, a pressure sensor is arranged at the connecting position of a power shaft of the pressing plate driving device and the pressing plate, and the pressure value detected by the pressure sensor is fed back to the control and display module. According to the utility model, the compression resistance test of the air guide cavity shell can be completed, and the test accuracy can be ensured.

Description

Technical Field

[0001] The utility model relates to a compressive strength testing device for an air guiding cavity housing of an automotive audio. Background Art

[0002] With the rapid development of the automotive industry, there are more and more car models, and the styles of automotive audio installed on cars are also constantly changing with the development of the automotive industry. For example Figure 4 as shown, in order to meet the inflation requirements, some automotive audio are specially equipped with an air guiding cavity housing communicated with the audio body. However, due to factors such as the installation position, the air guiding cavity housing has compressive strength testing requirements, and it needs to be able to withstand at least a pressure of more than 800 N, otherwise the air guiding cavity housing is regarded as unqualified. In the prior art, there is no special compressive strength testing device for the air guiding cavity housing of the automotive audio.

[0003] A multi-angle strength testing fixture for an automotive audio housing is disclosed in the Chinese utility model patent with the authorization announcement number of CN213933349U. However, this device is mainly used for testing the automotive audio housing, and its design purpose is mainly to facilitate the adjustment of the testing height and testing angle of the automotive audio housing. For example Figure 4 as shown, the structure of the air guiding cavity housing is quite different from that of the automotive audio housing, and the above device cannot meet the compressive strength testing requirements of the air guiding cavity housing. Content of the Utility Model

[0004] The purpose of the utility model is to provide a compressive strength testing device for an air guiding cavity housing of an automotive audio, which can complete the compressive strength testing of the air guiding cavity housing and ensure the accuracy of the testing.

[0005] The purpose of the utility model is realized by the following technical solutions:[[]]

[0006] A compressive strength testing device for an air guiding cavity housing of an automotive audio includes an air guiding cavity housing, a testing frame body, a pressing plate, a profiling plate and a pressing plate driving device. The testing frame body includes a top plate and a bottom plate connected by a plurality of connecting columns. The pressing plate driving device is arranged on the top plate. The pressing plate is arranged between the top plate and the bottom plate and is driven to move up and down by the pressing plate driving device. An installation groove is arranged on the lower side of the pressing plate, and the profiling plate is replaceably arranged in the installation groove. A foam is arranged on the upper side of the air guiding cavity housing. When performing the compressive strength testing, the lower side of the profiling plate abuts against the foam. A plurality of support columns and a plurality of support column installation screw holes are arranged on the bottom plate. The air guiding cavity housing is supported and positioned by each support column, and the lower ends of each support column are respectively installed in the corresponding support column installation screw holes. A control and display module is arranged on the top plate. A pressure sensor is arranged at the connection between the power shaft of the pressing plate driving device and the pressing plate, and the pressure value detected by the pressure sensor is fed back to the control and display module.

[0007] Each corner end of the pressing plate is provided with a guiding hole, and the connecting columns respectively pass through the corresponding guiding holes.

[0008] On the outer side of the housing body of the air guiding cavity housing, there is a side end plate with a connecting hole. On the bottom plate, there are end plate support columns and housing support columns. Among them, the side end plate is supported and positioned by the corresponding end plate support columns, and the housing body is supported and positioned by each housing support column.

[0009] At the upper end of the end plate support column, there is a positioning head, and the positioning head passes through the connecting hole on the corresponding side end plate.

[0010] Flexible pads are provided at the upper ends of both the end plate support column and the housing support column.

[0011] Both ends of the profiling plate are fixedly connected to the bottom of the installation groove through countersunk bolts on the corresponding sides.

[0012] Sliding protrusions are provided on both sides of the profiling plate. On both side walls of the installation groove, there are sliding grooves, and the sliding protrusions are respectively arranged in the corresponding sliding grooves. Pull handles are provided at both ends of the profiling plate.

[0013] On the lower side of the profiling plate, there is an inclined surface that matches the inclined upper surface of the air guiding cavity housing.

[0014] The control and display module includes a main controller, a prompt module, and a display screen. Among them, the pressure sensor, the prompt module, and the display screen are respectively connected to the corresponding ports on the main controller through corresponding connecting wires.

[0015] On one side of the bottom plate of the test frame body, there is an installation plate. And on the installation plate, there is a profiling plug block and a cylinder for driving the profiling plug block to move. A leak detection nozzle is provided on the profiling plug block, and the leak detection nozzle is connected to a leak detector. After the compressive strength test is completed, when the air guiding cavity housing is subjected to airtight detection, the housing opening on one side of the air guiding cavity housing is blocked by the profiling plug block.

[0016] The advantages and positive effects of the present utility model are as follows:

[0017] 1. The present utility model can complete the compressive strength test of the air guiding cavity housing and can ensure accurate testing. Among them, the lifting of the pressing plate of the present utility model is stable, which can ensure stable pressure application. At the same time, a profiling plate is provided on the lower side of the pressing plate to cooperate with the upper surface of the air guiding cavity housing to be tested to ensure uniform pressure application, thereby ensuring accurate compressive strength test results.

[0018] 2. The profiling plate of the present utility model is replaceably arranged on the lower side of the pressing plate, so as to meet the testing requirements of air guiding cavity housings of different specifications, which improves the flexibility and application range of the present utility model, and the replacement operation of the profiling plate is also simple and convenient.

[0019] 3. On the bottom plate of the test frame body of the present utility model, there are end plate support columns and shell support columns for positioning the air guide cavity shell to be tested, and the number and positions of the end plate support columns and shell support columns can also be replaced according to air guide cavity shells to be tested with different specifications, thereby further improving the flexibility of use of the present utility model.

[0020] 4. When the present utility model is tested, the pressure value applied can be displayed in real time on the display screen of the control and display module, which is convenient for the tester to observe. Description of the Drawings

[0021] Figure 1 is a structural schematic diagram of the present utility model,

[0022] Figure 2 is Figure 1 another angle structural schematic diagram of the present utility model in

[0023] Figure 3 is Figure 1 the structural schematic diagram of the pressing plate in

[0024] Figure 3 a is Figure 3 another installation structural schematic diagram of the pressing plate in

[0025] Figure 4 is the structural schematic diagram of the air guide cavity shell targeted by the present utility model.

[0026] Among them, 1 is the top plate, 2 is the connecting column, 3 is the pressing plate, 301 is the installation groove, 302 is the guiding hole, 4 is the profiling plate, 401 is the countersunk head bolt, 402 is the inclined surface, 403 is the sliding protrusion, 404 is the handle, 5 is the bottom plate, 501 is the end plate support column, 5011 is the positioning column head, 502 is the shell support column, 503 is the support column installation screw hole, 6 is the pressing plate driving device, 601 is the control and display module, 7 is the air guide cavity shell, 701 is the shell body, 702 is the side end plate, 703 is the foam, 704 is the shell opening. Detailed Embodiment

[0027] The present utility model will be described in further detail below with reference to the drawings.

[0028] As Figures 1 to 4 shown, the present utility model includes an air guide cavity shell 7, a test frame body, a pressing plate 3, a profiling plate 4 and a pressing plate driving device 6. Among them, the test frame body includes a top plate 1 and a bottom plate 5 connected by a plurality of connecting columns 2, and the pressing plate driving device 6 is arranged on the top plate 1. The pressing plate 3 is arranged between the top plate 1 and the bottom plate 5 and is connected to the power shaft of the pressing plate driving device 6. The pressing plate 3 is driven by the pressing plate driving device 6 to lift between the top plate 1 and the bottom plate 5. As Figure 3As shown, guiding holes 302 are provided at each corner end of the pressing plate 3, and the connecting columns 2 respectively pass through the corresponding guiding holes 302. In this way, while the connecting columns 2 play the role of connecting the top plate 1 and the bottom plate 5, they can also play the role of lifting and guiding when the pressing plate 3 moves, thereby ensuring the smooth lifting of the pressing plate 3. An installation groove 301 is provided on the lower side of the pressing plate 3, and the profiling plate 4 is replaceably arranged in the installation groove 301. As Figure 4 shown, a foam 703 is provided on the upper side of the air guiding cavity housing 7. When performing a compressive test, the lower side of the profiling plate 4 abuts against the foam 703 to exert pressure, so that it will not directly abut against the air guiding cavity housing 7 and cause damage. A plurality of support columns and a plurality of support column installation screw holes 503 are provided on the bottom plate 5. The air guiding cavity housing 7 is supported and positioned by each support column, and the lower ends of each support column are respectively installed in the corresponding support column installation screw holes 503.

[0029] As Figure 4 shown, a side end plate 702 with a connection hole is provided on the outer side of the housing body 701 of the air guiding cavity housing 7. As Figures 1 to 2 shown, the support columns on the bottom plate 5 include an end plate support column 501 and a housing support column 502. Among them, the side end plate 702 is supported and positioned by the corresponding end plate support column 501, and the housing body 701 is supported and positioned by each housing support column 502.

[0030] As Figure 1 shown, in this embodiment, the upper end of the end plate support column 501 is provided with a thinner positioning head 5011, and the positioning head 5011 passes through the connection hole on the corresponding side end plate 702. Flexible pads (which can be made of rubber material) are provided at the upper ends of both the end plate support column 501 and the housing support column 502 to abut against the surface of the air guiding cavity housing 7. Additionally, as Figures 1 to 2 shown, the positions of the support column installation screw holes 503 on the bottom plate 5 are designed according to the specifications and models of the air guiding cavity housing 7 to be detected. Threaded segments are provided at the lower ends of both the end plate support column 501 and the housing support column 502 and are respectively threadedly installed in the corresponding support column installation screw holes 503. Moreover, the present invention can flexibly adjust the number and installation positions of the end plate support column 501 and the housing support column 502 according to the shape of the housing body 701 of the air guiding cavity housing 7 with different specifications and models and the number of side end plates 702, thereby improving the flexibility and application range of the present invention.

[0031] As Figure 4 shown, the upper surface of the air guiding cavity housing 7 targeted by the present invention is not horizontal and usually has a certain inclination angle. Additionally, the inclination shapes of the front and rear sides of the upper surface of the air guiding cavity housing 7 with different specifications and models also vary. Therefore, as Figure 3As shown, the present invention applies pressure by using a profiling plate 4 whose lower surface shape matches the upper shape of the air guide cavity housing 7. The profiling plate 4 is replaceably mounted in the mounting groove 301 on the lower side of the pressure plate 3. In one embodiment of the present invention, the two ends of the profiling plate 4 are fixed to the bottom of the mounting groove 301 by countersunk bolts 401 on the corresponding sides. When the profiling plate 4 needs to be replaced, Figure 1 As shown, the operator can complete the removal of the countersunk bolt 401 from both sides of the pressure plate 3. After the countersunk bolt 401 is removed, the profiling plate 4 can automatically fall out of the mounting groove 301 under the action of gravity. The entire replacement process is simple and convenient. In addition, the nut of the countersunk bolt 401 is sunk into the corresponding mounting hole on the profiling plate 4 and will not be exposed from the lower surface of the profiling plate 4. Therefore, it will not affect the pressure on the gas guide cavity housing 7 to be tested.

[0032] like Figure 3 As shown, the profiling plate 4 is mainly provided with an inclined surface 4 on its lower side to match the inclined upper surface of the air guide cavity housing 7. The upper surface inclination angles of air guide cavity housings 7 of different specifications are slightly different. The profiling plate 4 is designed for a specific specification of air guide cavity housing 7. Its lower side can completely fit with the upper surface of the air guide cavity housing 7 to be tested, thereby ensuring that the pressure applied by the pressing plate 3 is evenly distributed on the air guide cavity housing 7 to be tested, thereby ensuring that the pressure test results are more accurate. Otherwise, if the pressing plate 3 is only used to press against the upper surface of the air guide cavity housing 7 to be tested, since the upper surface of the air guide cavity housing 7 is not horizontal, the pressure applied by the pressing plate 3 to different positions of the housing will be different, and the housing position with greater pressure will be easily damaged, which will affect the test results. The shape of the profiling plate 4 on both sides of the inclined surface 4 is also designed according to the shape of the air guide cavity housing 7 to be tested.

[0033] and Figure 3 As shown in a, in another embodiment of the present invention, sliding protrusions 403 are provided on both sides of the profiling plate 4, and sliding grooves are provided on the groove walls on both sides of the installation groove 301, and the sliding protrusions 403 are respectively arranged in the corresponding sliding grooves, and handles 404 are provided at both ends of the profiling plate 4, so that the operator can pull the handles 404 to pull out the profiling plate 4 and reinsert a new suitable profiling plate 4. This structure eliminates the operation of screwing the countersunk bolts 401, thereby further simplifying the replacement process of the profiling plate 4, and also avoids the situation where the countersunk bolts 401 are lost at the test site.

[0034] like Figure 1As shown, in this embodiment, a control and display module 602 is provided on the top plate 1, wherein a pressure sensor is provided at the connection between the power shaft of the pressure plate drive device 6 and the pressure plate 3 for real-time detection of the applied pressure value, and the detected pressure value is fed back to the control and display module 602. In this embodiment, the control and display module 602 includes a main controller, a prompt module and a display screen, wherein the pressure sensor, the prompt module and the display screen are respectively connected to the corresponding ports on the main controller through corresponding lines. The pressure value detected by the pressure sensor is first transmitted to the main controller, and then transmitted by the main controller to the display screen for real-time display. When the pressure value reaches the set requirement (800 Newtons in this embodiment), the main controller controls the prompt module (such as a sound-emitting device such as a speaker module) to emit a prompt sound to remind the tester. The pressure sensor and the control and display module 602 are both well-known technologies in the art and are commercially available products. For example, a pressure sensor of the First brand and a matching control and display module 602 can be selected.

[0035] The working principle of this utility model is:

[0036] Before testing, the tester can adjust the number and position of the end plate support column 501 and the shell support column 502 according to the specifications and models of the air guide cavity shell 7 to be tested to meet the positioning needs of air guide cavity shells 7 of different specifications, and when adjusting, it is only necessary to screw the corresponding end plate support column 501 or shell support column 502 to disengage it from the corresponding support column mounting screw hole 503 on the base plate 5, and then thread it into the other support column mounting screw hole 503. The operation is simple and convenient.

[0037] In addition, before the detection, the utility model also needs to determine the specifications of the profiling plate 4 on the lower side of the pressing plate 3 according to the specifications of the air guide cavity housing 7 to be detected and replace it. Figure 1 As shown, the pressing plate 3 first rises to the set height (or maximum height), and then the operator can complete the removal of the countersunk bolts 401 from both sides of the pressing plate 3. After the countersunk bolts 401 are removed, the profiling plate 4 can automatically fall out of the installation groove 301 under the action of gravity. Then the operator pulls out the profiling plate 4 and replaces it with a profiling plate 4 of a suitable shape and installs it in the installation groove 301 on the lower side of the pressing plate 3. Or as Figure 3 As shown in FIG. 1 , the present invention can also adopt a random installation structure of the profiling plate 4 , in which case the profiling plate 4 can be pulled out and replaced by simply pulling the handle 404 .

[0038] After the end plate support column 501, the shell support column 502 and the profiling plate 4 are adjusted, the tester puts the gas guide cavity shell 7 to be tested into the test frame and places it on each support column between the pressure plate 3 and the bottom plate 5. Figures 1 to 2 and Figure 4As shown, the side of the air guiding cavity housing 7 to be tested with the foam 703 faces upward, and the housing body 701 of the air guiding cavity housing 7 is supported and positioned by each housing support column 502. The side end plate 702 outside the air guiding cavity housing 7 is supported by the corresponding end plate support column 501. The positioning head 5011 at the upper end of the end plate support column 501 is inserted into the connection hole on the corresponding side end plate 702 to prevent the air guiding cavity housing 7 to be tested from moving around.

[0039] After the air guiding cavity housing 7 is placed, the tester controls the start of the pressing plate driving device 6 to drive the pressing plate 3 to descend to start applying pressure. The pressing plate driving device 6 can select linear driving devices such as cylinders, oil cylinders, and electric push rods according to needs. And a pressure sensor is provided at the connection between the power shaft of the pressing plate driving device 6 and the pressing plate 3 to detect the magnitude of the applied pressure value in real time. The detected pressure value will be fed back to the display screen of the control and display module 602 for the tester to observe in real time. In this embodiment, when the pressure applied by the pressing plate 3 reaches 800 N and after the set time is applied, the tester then controls the pressing plate 3 to rise and takes out the air guiding cavity housing 7 for damage detection. If the air guiding cavity housing 7 has no damage, it is regarded as qualified.

[0040] In addition, as Figure 4 shown, in order to ensure accurate detection of the housing damage, the present utility model can be provided with a mounting plate on one side of the bottom plate 5 of the test frame body. The mounting plate is provided with a profiling plug and a cylinder for driving the profiling plug to move. And a leak detection nozzle is provided on the profiling plug. The leak detection nozzle is connected to a leak detector. After the compressive test is completed, the tester can control the cylinder to start and drive the profiling plug to block the housing opening 704 on one side of the air guiding cavity housing 7. Then the leak detector is started to detect the airtightness of the entire air guiding cavity housing 7 after being blocked by the profiling plug. If there is a leakage situation, it means that the air guiding cavity housing 7 is damaged after being pressed, and the compressive test is unqualified. The leak detection nozzle and the leak detector are well-known technologies in the art and are commercially available products. For example, a product of model FL-296L-0 of FKD Company in Japan can be used. The profiling plug can be made of silicone material to ensure that it can fill and block the housing opening 704.

Claims

1. An anti-compression test device for the air guiding cavity housing of an automotive audio, characterized in that: It includes an air guide cavity housing (7), a test frame body, a pressing plate (3), a profiling plate (4) and a pressing plate driving device (6). The test frame body includes a top plate (1) and a bottom plate (5) connected by a plurality of connecting columns (2). The pressing plate driving device (6) is arranged on the top plate (1). The pressing plate (3) is arranged between the top plate (1) and the bottom plate (5) and is driven to move up and down by the pressing plate driving device (6). An installation groove (301) is arranged on the lower side of the pressing plate (3), and the profiling plate (4) is replaceably arranged in the installation groove (301). A foam (703) is arranged on the upper side of the air guide cavity housing (7). When performing a compressive test, the lower side of the profiling plate (4) abuts against the foam (703). A plurality of support columns and a plurality of support column installation screw holes (503) are arranged on the bottom plate (5). The air guide cavity housing (7) is supported and positioned by each support column, and the lower ends of each support column are respectively installed in the corresponding support column installation screw holes (503). A control and display module (602) is arranged on the top plate (1). A pressure sensor is arranged at the connection between the power shaft of the pressing plate driving device (6) and the pressing plate (3), and the pressure value detected by the pressure sensor is fed back to the control and display module (602).

2. The anti-compression test device for the air guide cavity housing of an automotive audio according to claim 1, wherein: Guide holes (302) are arranged at each corner end of the pressing plate (3), and the connecting columns (2) respectively pass through the corresponding guide holes (302).

3. The anti-compression test device for the air guiding cavity housing of an automotive audio, characterized in that: A side end plate (702) with a connection hole is arranged on the outer side of the housing body (701) of the air guide cavity housing (7). End plate support columns (501) and housing support columns (502) are arranged on the bottom plate (5). The side end plate (702) is supported and positioned by the corresponding end plate support columns (501), and the housing body (701) is supported and positioned by each housing support column (502).

4. The automotive audio air guide cavity housing compressive strength testing device according to claim 3, characterized in that: A positioning head (5011) is arranged at the upper end of the end plate support column (501), and the positioning head (5011) passes through the connection hole on the corresponding side end plate (702).

5. The anti-compression test device for the air guide cavity housing of an automotive audio according to claim 3, characterized in that: Flexible pads are arranged at the upper ends of the end plate support columns (501) and the upper ends of the housing support columns (502).

6. The anti-compression test device for the air guide cavity housing of an automotive audio according to claim 1, characterized in that: Both ends of the profiling plate (4) are fixedly connected to the bottom of the installation groove (301) by countersunk head bolts (401) on the corresponding sides.

7. The anti-compression test device for the air guiding cavity housing of an automotive audio, characterized in that: Sliding protrusions (403) are arranged on both sides of the profiling plate (4). Sliding grooves are arranged on the two side walls of the installation groove (301), and the sliding protrusions (403) are respectively arranged in the corresponding sliding grooves. Handles (404) are arranged at both ends of the profiling plate (4).

8. The anti-compression test device for the air guide cavity housing of an automotive audio, characterized in that: An inclined surface (4) matching the inclined upper surface of the air guide cavity housing (7) is arranged on the lower side of the profiling plate (4).

9. The anti-compression test device for the air guiding cavity housing of an automotive audio according to claim 1, wherein: The control and display module (602) includes a main controller, a prompt module and a display screen. The pressure sensor, the prompt module and the display screen are respectively connected to the corresponding ports on the main controller through corresponding connecting wires.

10. The anti-compression test device for the air guide cavity housing of an automotive audio, characterized in that: One side of the bottom plate (5) of the test frame body is provided with a mounting plate, and the mounting plate is provided with a profiling plug and a cylinder for driving the profiling plug to move. The profiling plug is provided with a leak detection nozzle, and the leak detection nozzle is connected to a leak detector. After the compressive strength test is completed, when the air guide cavity housing (7) is subjected to an airtightness test, the housing opening (704) on one side of the air guide cavity housing (7) is blocked by the profiling plug.

Images