Mute supporting mechanism for abnormal sound test

Abstract

The utility model discloses a mute supporting mechanism for an abnormal sound test. The mute supporting mechanism comprises a base, a vibration table and a movable supporting piece, the movable supporting piece comprises a mounting base block and a supporting air bag, an airflow channel is formed in the mounting base block, a first connector and a second connector are formed in the upper surface and the side face of the mounting base block at the two ends of the airflow channel respectively, and the lower end of the supporting air bag is fixedly connected with the upper surface of the mounting base block. The supporting air bag is provided with an inflation and deflation hole communicated with the first connector, and the second connector is connected with a protruding inflation and deflation connector. The base is fixedly connected with the lower surface of the mounting base block, and the vibration table is connected with the upper end of the supporting air bag. The supporting air bag is arranged, the supporting air bag made of the flexible material has the effect of absorbing vibration and is not prone to generating noise, the supporting air bag is in soft-hard connection with the base or the movable table, noise sites are not prone to being formed, and therefore a background environment with lower noise can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of abnormal sound detection, in particular to a silent supporting mechanism for abnormal sound testing. Background Art

[0002] Abnormal noise from cars is an important factor affecting the comfort of use. The vibration generated during high-speed operation of the vehicle will stimulate various components or assemblies to produce abnormal noise. Automobile manufacturers usually conduct abnormal noise tests on vehicle components and complete vehicles to detect and eliminate abnormal noise.

[0003] Abnormal noise tests generally simulate the vibration environment of a vehicle during high-speed operation by providing excitation to components or the entire vehicle. Taking the abnormal noise test of components as an example, the corresponding abnormal noise test bench generally includes a support frame, a test bench connected to the support frame, and a driving device that applies an excitation force to the test bench. During the abnormal noise test, the vehicle components are fixed on the test bench, and the driving device causes the test bench to vibrate, thereby exciting the abnormal noise of the vehicle components. In order to meet the vibration requirements of the test bench, a movable connection structure must be used between the test bench and the support frame. The patent document with application number CN202410080685.9 discloses a vehicle abnormal noise detection platform, which includes a static platform, a dynamic platform and four branch motion chains. The four branch motion chains use an articulated structure to connect the static platform and the dynamic platform. After being driven, the branch motion chains will rotate based on the hinges, thereby causing the dynamic platform to move. By inputting the corresponding excitation force into the branch motion chains, the components fixed on the dynamic platform can be vibrated. The above scheme uses an articulated structure to achieve movable support of the test bench to meet the vibration requirements of the test bench. However, the abnormal sound test usually requires that the test equipment itself has a relatively low operating noise to avoid affecting the detection and analysis of the abnormal sound. The large number of hinge structures in the above scheme introduces multiple sites that may generate noise to the equipment itself. Especially after the equipment has been used for a period of time, as the components wear out, the noise problem will become more obvious. Therefore, it is difficult to meet some high-precision abnormal sound test requirements. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a silent support mechanism for abnormal sound test, which can ensure that the support mechanism generates less noise while playing a movable supporting role, so as to meet the requirements of high-precision abnormal sound test.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A silent support mechanism for abnormal noise testing includes a base, a vibration table and a movable support member; the movable support member includes a mounting base block and a support airbag, an air flow channel is provided in the mounting base block, and the two ends of the air flow channel form a first interface and a second interface on the upper surface and the side of the mounting base block respectively, the lower end of the support airbag is fixedly connected to the upper surface of the mounting base block, the support airbag is provided with a charging and discharging hole communicating with the first interface, and the second interface is connected to a protruding charging and discharging connector; the base is fixedly connected to the lower surface of the mounting base block, and the vibration table is connected to the upper end of the support airbag.

[0007] Furthermore, the supporting airbag includes a plurality of annular airbag units arranged and connected longitudinally, and grooves are formed at the junctions of adjacent airbag units.

[0008] Furthermore, the supporting airbag includes a plurality of first airbag units located in the middle and second airbag units located at both ends, and the thickness of the first airbag unit is greater than that of the second airbag unit.

[0009] Furthermore, the silent support mechanism also includes a sensing component for sensing the height of the vibration table.

[0010] Furthermore, the sensing assembly includes a sensing component connected to the base and an activation component connected to the vibration table.

[0011] Furthermore, the sensing component includes a horizontally arranged optical sensor fixedly connected to the base, and the activating component includes a vertically arranged reflective plate fixedly connected to the vibration table.

[0012] Furthermore, the sensing component includes a first sensor that is relatively higher and a second sensor that is relatively lower, and the activating component includes a first reflector that is relatively higher and a second reflector that is relatively lower.

[0013] Furthermore, the sensing component further includes a first mounting bracket having a first strip-shaped mounting hole extending vertically, and the optical sensor passes through the first strip-shaped mounting hole and forms a detachable connection with the first mounting bracket.

[0014] Furthermore, the activation component further includes a second mounting bracket, the second mounting bracket has a second strip-shaped mounting hole extending vertically, and the reflective plate is detachably connected to the second mounting bracket through the second strip-shaped mounting hole.

[0015] Furthermore, the base includes a column and a support base plate connected to the upper end of the column, and the mounting base block is fixedly connected to the support base plate.

[0016] The application of this utility model can achieve the following beneficial effects:

[0017] 1. The utility model uses an inflatable and deflable support airbag to movably connect the base and the vibration table, so that the vibration table can move when subjected to external force, thereby ensuring the progress of the abnormal noise test. The support airbag made of flexible material itself has the effect of absorbing vibration and is not easy to generate noise under vibration. The support airbag and the base or movable table are connected in a soft-hard manner. Compared with the hinged structure with a hard-hard connection, the connection part of the utility model is not easy to form a noise site, so it can provide a quieter background environment for the abnormal noise test, thereby being competent for high-precision abnormal noise tests.

[0018] 2. The utility model sets a sensing component to sense the height of the vibration table. The sensing component forms a signal connection with the solenoid valve that controls the inflation and deflation of the airbag, so that the support airbag can always maintain an appropriate support height. When the objects to be tested of different weights are replaced, the internal air pressure of the airbag can be automatically adjusted, and the abnormal sound test process is faster and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a silent support mechanism for abnormal noise testing in an embodiment;

[0020] Figure 2 for Figure 1 Side view of;

[0021] Figure 3 It is a structural diagram of the sensing component;

[0022] In the figure, 1-base, 11-column, 12-support substrate, 2-vibration table, 3-movable support, 31-mounting base, 311-air flow channel, 312-charging and discharging connector, 32-support airbag, 321-first airbag unit, 322-second airbag unit, 4-sensing component, 41-sensing component, 411-first sensor, 412-second sensor, 413-first mounting bracket, 4131-first strip mounting hole, 42-activation component, 421-first reflector, 422-second reflector, 423-second mounting bracket, 4231-second strip mounting hole. DETAILED DESCRIPTION

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0024] Reference Figure 1 and Figure 2, this embodiment provides a silent support mechanism for abnormal sound test, which includes a base 1, a vibration table 2 and a movable support member 3 for movably connecting the base and the vibration table; the movable support member 3 includes a mounting base block 31 and a support airbag 32, an air flow channel 311 is provided inside the mounting base block 31, and the air flow channel forms a first interface and a second interface on the upper surface and side of the mounting base block respectively, and the bottom of the support airbag is provided with a charging and discharging hole for filling or discharging internal gas, the bottom of the support airbag is connected to the upper side of the mounting base block and the charging and discharging hole is communicated with the first connection hole, the second interface is connected to a raised charging and discharging connector 312, during the abnormal sound test, the charging and discharging connector is connected to a charging and discharging device, and the charging and discharging device The device controls the working state of its own solenoid valve to input gas into the charging and discharging connector or discharge gas through the charging and discharging connector, thereby changing the internal air pressure of the support airbag, thereby adapting to different weights of the objects to be measured, so that the vibration table is supported at a predetermined height, avoiding affecting the connection of other device structures; the bottom of the vibration table 2 is connected to the upper end of the support airbag, so that the vibration table can vibrate in multiple directions after receiving the excitation force; usually, the base can include a column 11 and a support base plate 12 connected to the upper end of the column, and the movable support member 3 can be detachably installed above the support base plate. Through the above structure, the vibration table can be further suspended to facilitate the installation of other device structures under the vibration table, such as an abnormal sound monitoring device or a drive device.

[0025] In a preferred embodiment, the supporting airbag includes a plurality of airbag units connected in series and arranged vertically, and grooves are formed at the junction of adjacent airbag units, and the grooves are used to adapt to the compression and extension deformation during the inflation and deflation of the airbag. In a more preferred embodiment, the airbag unit includes a first airbag unit 321 located in the middle of the supporting airbag and a second airbag unit 322 located at both ends of the supporting airbag. The longitudinal thickness of the first airbag unit is relatively large, so that it has a larger air cavity inside to achieve a larger compression and extension deformation. The longitudinal thickness of the second airbag unit is relatively small, and the deformation during the inflation and deflation process is small to avoid affecting the connection stability between the supporting airbag and the mounting base block or vibration table.

[0026] Reference Figures 1-3In another embodiment of the present invention, the silent support mechanism also includes a sensing component 4, which can be used to sense the height of the vibration table 2, and under certain circumstances, send instructions to the inflation and deflation device through the control system, so that the inflation and deflation device controls the inflation or deflation of the support airbag. The sensing component includes a sensing component 41 connected to the base and an activation component 42 connected to the vibration table. When the vibration table changes in height and drives the activation component to move up and down, the signal received by the sensing component will change, and then different instructions will be sent according to the signal change. Taking one embodiment as an example, the sensing component 41 includes a horizontally arranged optical sensor, and the activation component includes a vertically arranged reflector. When the reflector is in the detection area of ​​the optical sensor, the optical sensor is in a first signal state. When the reflector leaves the detection area of ​​the optical sensor, the optical sensor is in a second signal state. The inflation and deflation of the airbag can be controlled according to the different signal states. The present invention also provides a more specific control method, with reference to Figure 3 The sensing component 41 includes a first sensor 411 that is relatively higher and a second sensor 412 that is relatively lower. The activating component 42 includes a first reflector 421 that is relatively higher and a second reflector 422 that is relatively lower. The first sensor corresponds to the position of the first reflector, and the second sensor corresponds to the position of the second reflector. In the normal supporting state, the first reflector should be at a position higher than the first sensor, and the second reflector should be at a position lower than the second sensor. When the first reflector enters the detection range of the first sensor, it indicates that the height of the vibration platform is too low. The first sensor is activated and sends a command to the inflation and deflation device to inflate the support airbag. When the second reflector enters the detection range of the second sensor, it indicates that the height of the vibration platform is too high. The second sensor is activated and sends a command to the inflation and deflation device to deflate the support airbag. Through the cooperation of the above two sets of sensing mechanisms, the height of the vibration platform will automatically maintain at a relatively stable position.

[0027] In a further preferred embodiment, the sensing component 41 also includes a first mounting bracket 413, which is provided with a first strip mounting hole 4131 extending vertically. The optical sensor passes through the first strip mounting hole and forms a detachable connection with the first mounting bracket, so that the height position of the optical sensor can be adjusted. The activation component also includes a second mounting bracket 423, which is provided with a second strip mounting hole 4231 extending vertically. The reflector forms a detachable connection with the second mounting bracket through the second strip mounting hole, so that the height position of the reflector can be adjusted, thereby facilitating response to different test requirements and facilitating the later maintenance of the sensing component.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A silent support mechanism for abnormal noise testing, characterized by: The invention comprises a base (1), a vibration table (2) and a movable support member (3); the movable support member comprises a mounting base block (31) and a support airbag (32); an air flow channel (311) is provided in the mounting base block, and two ends of the air flow channel form a first interface and a second interface on the upper surface and side of the mounting base block respectively; the lower end of the support airbag is fixedly connected to the upper surface of the mounting base block, the support airbag is provided with a charging and discharging hole communicating with the first interface, and the second interface is connected to a protruding charging and discharging connector (312); the base is fixedly connected to the lower surface of the mounting base block, and the vibration table is connected to the upper end of the support airbag.

2. The silent support mechanism for abnormal noise testing according to claim 1, characterized in that: The supporting airbag comprises a plurality of annular airbag units arranged in series longitudinally, and grooves are formed at the joints of adjacent airbag units.

3. The silent support mechanism for abnormal noise testing according to claim 2, characterized in that: The supporting airbag (32) comprises a plurality of first airbag units (321) located in the middle and second airbag units (322) located at both ends, and the thickness of the first airbag units is greater than that of the second airbag units.

4. The silent support mechanism for abnormal noise testing according to claim 1, characterized in that: The silent support mechanism also includes a sensing component (4) for sensing the height of the vibration table.

5. The silent support mechanism for abnormal noise testing according to claim 4, characterized in that: The sensing component comprises a sensing component (41) connected to the base and an activation component (42) connected to the vibration table.

6. The silent support mechanism for abnormal noise testing according to claim 5, characterized in that: The sensing component includes a horizontally arranged optical sensor fixedly connected to the base, and the activating component includes a vertically arranged reflective plate fixedly connected to the vibration table.

7. The silent support mechanism for abnormal noise testing according to claim 6, characterized in that: The sensing component comprises a first sensor (411) arranged relatively higher and a second sensor (412) arranged relatively lower, and the activating component comprises a first reflective plate (421) arranged relatively higher and a second reflective plate (422) arranged relatively lower.

8. The silent support mechanism for abnormal noise testing according to claim 6, characterized in that: The sensing component further comprises a first mounting frame (413), the first mounting frame having a first strip-shaped mounting hole (4131) extending vertically, the optical sensor passing through the first strip-shaped mounting hole and forming a detachable connection with the first mounting frame.

9. The silent support mechanism for abnormal noise testing according to claim 6, characterized in that: The activation component further comprises a second mounting frame (423), the second mounting frame having a second strip-shaped mounting hole (4231) extending vertically, and the reflective plate is detachably connected to the second mounting frame via the second strip-shaped mounting hole.

10. The silent support mechanism for abnormal noise testing according to claim 1, characterized in that: The base comprises a column (11) and a support base plate (12) connected to the upper end of the column, and the mounting base block is fixedly connected to the support base plate.

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