Noise testing device
By designing a noise test device including reflector plate, fixed block and suspension, the problem of inconsistent distance requirements in the noise test of the range hood is solved, and accurate noise testing and good adaptability are achieved.
Patent Information
- Application Number
- CN202421804911.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The prior art is difficult to meet the 10mm±5mm distance requirement between the back and the wall in noise test, resulting in inaccurate testing of the test.
A noise testing device is designed, including a reflector plate, a fixed block and a suspended member. Through the specific dimensional relationship between the suspension plate and the reflector plate, the distance between the back plate of the part to be tested and the reflector plate meets the test standards, and the precise position adjustment of the part to be tested is achieved through the design of the fixed block and screw.
This device can accurately meet the distance requirements between the range hood and the reflector plate, reduce test errors, improve the accuracy and adaptability of noise tests, and is suitable for parts to be tested of different sizes and types.
Smart Images
Figure CN222993837U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of noise testing, and in particular to a noise testing device. Background Art
[0002] Regarding the test of the noise in the semi-anechoic chamber of the range hood, GB / T17713-2022 "Ranger hoods and other cooking fume suction and exhaust devices" requires that the distance between the back of the range hood and the wall be D = 10mm ± 5mm, and the supporting device is required to be supported at 0.6m from the horizontal reflective surface in the free field environment. The minimum dimension of the vertical wall should be at least equal to the projection dimension of the device under test on the wall.
[0003] For range hoods that are not convenient to place on standard support devices, such as side-suction range hoods, the existing technical solution is to use a triangular-shaped fixture to fix the range hood, install the range hood on the fixture, move it to the vertical reflector through the bottom pulley, and then pull the wire rope through the reel to achieve the up and down movement of the range hood. However, the existing solution does not meet the 10mm±5mm distance requirement between the back of the range hood and the wall, so the existing technical fixture cannot meet the requirements of noise testing. Summary of the invention
[0004] In view of the above problems in the prior art, the purpose of the present application is to solve the defect in the prior art that when performing noise testing on the range hood, the distance between the range hood and the reflective plate and the ground does not meet the test requirements.
[0005] In order to solve the above problems, the present application provides a noise testing device for suspending a part to be detected and performing a noise test on it, wherein the noise testing device comprises a reflecting plate, a fixed block and a hanging member, wherein the setting direction of the reflecting plate is perpendicular to the ground, the fixed block is clamped between the two reflecting plates, and the hanging member is arranged on the side surface of the reflecting plate away from the fixed block for suspending the part to be detected, the hanging member is connected to the fixed block, and the fixed block can drive the part to be detected to move along the setting direction of the reflecting plate, and along the horizontal direction perpendicular to the reflecting plate, the size of the back plate of the part to be detected from the reflecting plate is not greater than the thickness of the hanging member.
[0006] Preferably, the reflective plate is provided with a slide groove, the setting direction of the slide groove is the same as the setting direction of the reflective plate, one end of the suspension member is embedded in the slide groove and connected to the fixed block, and the slide groove is used to limit the moving direction of the suspension member.
[0007] Preferably, along a direction perpendicular to the arrangement direction of the reflective plate, a cross-sectional dimension of the suspension member is larger than a cross-sectional dimension of the slide groove.
[0008] Preferably, the noise testing device further includes a shock absorber and a connecting rod. The connecting rod is disposed in the sliding groove and connected to the fixed block. The shock absorber and the suspension member are respectively disposed at two ends of the connecting rod, and the shock absorber is disposed below the suspension member for damping the component to be detected.
[0009] Preferably, along the direction perpendicular to the setting direction of the reflecting plate, the cross-sectional dimension of the connecting rod is not greater than the cross-sectional dimension of the sliding groove.
[0010] Preferably, the reflecting plate is provided with a connecting section which is disposed at the top end of the reflecting plate along its setting direction. The noise testing device further includes a screw rod which sequentially passes through the connecting section and the fixed block. The setting direction of the screw rod is the same as the setting direction of the reflecting plate, and the fixed block can move along the setting direction of the screw rod under the rotation of the screw rod.
[0011] Preferably, a ball bearing is disposed between the screw rod and the connecting section, and a limiting block is disposed between the connecting section and the fixed block. The limiting block surrounds the outer wall surface of the screw rod, and an internal thread adapted to the screw rod is disposed on the inner wall surface of the limiting block to limit the rotation position of the screw rod.
[0012] Preferably, the noise testing device further includes a driving assembly which is disposed at one end of the screw rod away from the connecting section and on the side of the reflecting plate facing the fixed block for driving the rotation of the screw rod.
[0013] Preferably, the driving assembly includes a driving member, a driving gear and a driven gear. The driving shaft of the driving member is connected to the driving gear. The driving gear and the driven gear are meshed with each other, and the central axis of the driving gear is perpendicular to the central axis of the driven gear. The driven gear is connected to the screw rod.
[0014] Preferably, the noise testing device further includes a fixing member. The reflecting plate is provided with fixing grooves which are disposed at both ends of the reflecting plate along its setting direction. The fixing member is embedded in the fixing grooves for fixing the position of the reflecting plate.
[0015] Due to the above technical solution, the noise testing device of the present application has the following beneficial effects:
[0016] By designing a specific dimensional relationship between the suspension member and the reflector, it is ensured that the distance between the back panel of the component to be tested (such as a range hood) and the reflector is not greater than the thickness of the suspension member, thus meeting the requirements for the distance between the component to be tested and the reflector in the noise test standard, further reducing the test error caused by non-compliance with the standard distance, and thereby improving the accuracy of the noise test for the component to be tested. Moreover, the design of the fixing block enables the component to be tested to move along the direction of the reflector arrangement, improving the convenience and accuracy of adjusting the position of the component to be tested and facilitating quick positioning to the position required for testing. In addition, this noise test device is applicable to components to be tested with different sizes and types. By simply adjusting the thickness of the suspension member, it can adapt to different test standards and has good adaptability. Description of the Drawings
[0017] To more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 is the front view of the noise test device provided by the embodiment of the present application.
[0019] Figure 2 is Figure 1 the partial enlarged view of A in
[0020] Figure 3 is the rear view of the noise test device provided by the embodiment of the present application.
[0021] Figure 4 is the sectional view of the noise test device provided by the embodiment of the present application.
[0022] Figure 5 is Figure 4 the partial enlarged view of B in
[0023] Figure 6 is Figure 4 the partial enlarged view of C in
[0024] Figure 7 is Figure 4 the partial enlarged view of D in
[0025] Among them, the reference numerals are explained as follows: noise test device 100, reflector 11, sliding groove 111, connecting section 112, fixing groove 113, fixing block 12, suspension member 13, sheet plate 131, hook 132, shock absorber 14, connecting rod 15, ball bearing 16, limiting block 17, driving assembly 18, driving member 181, driving gear 182, driven gear 183, screw 184, fixing member 19, setting direction X of the reflector. Detailed implementation manners
[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.
[0027] As used herein, the term "one embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.
[0028] As Figures 1-7 shown, this embodiment discloses a noise test device 100, which is applied to a noise test scenario for hanging a component to be detected. In this embodiment, the component to be detected is a range hood, and in other embodiments, components to be detected can be hung as required.
[0029] Among them, the noise testing device 100 includes a reflector 11, a fixing block 12, and a suspension member 13. The setting direction X of the reflector is perpendicular to the ground. The fixing block 12 is clamped between two reflectors 11. The suspension member 13 is arranged on the surface of the reflector 11 facing away from the fixing block 12 for suspending the component to be detected. The suspension member 13 is connected to the fixing block 12. The fixing block 12 can drive the component to be detected to move along the setting direction X of the reflector, and along the horizontal direction perpendicular to the reflector 11, the distance between the back plate of the component to be detected and the reflector 11 is not greater than the thickness of the suspension member 13.
[0030] In this embodiment, the "thickness of the suspension member 13" mentioned above refers to: along the direction perpendicular to the setting direction X of the reflector 11, that is, in the horizontal direction, the length of the end of the suspension member 13 away from the reflector 11 from the reflector 11, which is the overall thickness of the suspension member 13. In this way, after the component to be detected is suspended on the suspension member 13, at least part of the suspension member 13 can be embedded into the interior of the component to be detected. Therefore, the distance between the back plate of the component to be detected and the reflector 11 will definitely be less than the overall thickness of the suspension member 13 itself. Preferably, in this embodiment, as Figure 6 shown, the suspension member 13 includes a sheet-like plate 131 with a protruding structure, and a hook 132 arranged on the sheet-like plate 131 for suspending the component to be detected. One end of the sheet-like plate 131 is installed on the reflector 11, and the other end protrudes in the direction away from the sheet-like plate 131. The length of the surface of the sheet-like plate 131 facing the reflector 11 from the reflector 11 is 10 mm, and the thickness of the sheet-like plate 131 itself is 3 mm. In this way, when the component to be detected is suspended on the hook 132, it can be attached to the end of the sheet-like plate 131 away from the reflector 11. Therefore, the distance between the back of the component to be detected and the reflector 11 can meet the distance requirement of 10 mm ± 5 mm.
[0031] Therefore, by designing the specific dimensional relationship between the suspension member 13 and the reflector 11, it is ensured that the distance between the back plate of the component to be detected (such as a range hood) and the reflector 11 is not greater than the thickness of the suspension member 13, thus meeting the requirements for the distance between the component to be detected and the reflector 11 in the noise test standard, and further reducing the test error caused by non-compliant distance, thereby improving the accuracy of the noise test of the component to be detected. Moreover, the design of the fixing block 12 enables the component to be detected to move along the setting direction X of the reflector, improving the convenience and accuracy of adjusting the position of the component to be detected, and facilitating quick positioning to the required test position. In addition, the noise testing device 100 is applicable to components to be detected with different sizes and types. By simply adjusting the thickness of the suspension member 13, it can adapt to different test standards, having good adaptability.
[0032] Such as Figure 2 and Figure 6As shown, the reflector 11 is provided with a sliding groove 111. The setting direction of the sliding groove 111 is the same as the setting direction X of the reflector. One end of the suspension member 13 is embedded in the sliding groove 111 and connected to the fixing block 12. The sliding groove 111 is used to define the moving direction of the suspension member 13, playing a guiding role to prevent the suspension member 13 from shifting left and right when moving along the setting direction X of the reflector, thereby maintaining the stability of the component to be detected and the accuracy of the test.
[0033] Preferably, along the direction perpendicular to the setting direction X of the reflector, the cross-sectional dimension of the suspension member 13 is larger than that of the sliding groove 111. Such a setting can prevent the suspension member 13 from accidentally falling out of the sliding groove 111, increasing the safety of the suspension system. Moreover, when the suspension member 13 moves in the sliding groove 111, due to the limitation of the cross-sectional dimension, it can play a better guiding role to ensure that the suspension member 13 can only move along the predetermined direction and will not generate unnecessary displacement in the horizontal direction.
[0034] Specifically, the noise test device 100 further includes a shock-absorbing member 14 and a connecting rod 15. The connecting rod 15 is arranged in the sliding groove 111 and connected to the fixing block 12. The shock-absorbing member 14 and the suspension member 13 are respectively arranged at both ends of the connecting rod 15. The shock-absorbing member 14 is arranged below the suspension member 13 to be in contact with the component to be detected to achieve shock absorption for the component to be detected, absorb and reduce the vibration of the component to be detected in the suspended state, thereby reducing the noise caused by the vibration of the component to be detected, improving the accuracy of the noise test, and also reducing the influence of external vibration on the test result, improving the stability and repeatability of the test.
[0035] In this embodiment, the number of the connecting rods 15 is two. The two connecting rods 15 are arranged at both ends of the suspension member 13 along its horizontal extension direction, and the two connecting rods 15 are both vertically arranged in the sliding groove 111.
[0036] Preferably, along the direction perpendicular to the setting direction X of the reflector, the cross-sectional dimension of the connecting rod 15 is not larger than that of the sliding groove 111. Such a setting can not only ensure that the connecting rod 15 will not be subject to excessive frictional resistance when moving in the sliding groove 111, enabling the connecting rod 15 to move smoothly up and down, but also reduce the gap between the connecting rod 15 and the sliding groove 111, enabling more precise control of the position of the connecting rod 15, and further precisely controlling the positions of the suspension member 13 and the component to be detected, improving the accuracy of the test.
[0037] Regarding the test of the noise of the semi-anechoic chamber of the range hood, GB / T 17713-2022 "Range Hoods and Other Cooking Fume Exhaust Devices" requires that the support device be supported at a distance of 0.6 m from the horizontal reflecting surface in the free-field environment, and the minimum size of the vertical wall surface should be at least equal to the projection size of the appliance to be measured on the wall.
[0038] Therefore, as Figure 5As shown, the reflector 11 is provided with a connecting section 112. The connecting section 112 is arranged at the top of the reflector 11 along its setting direction. The noise testing device 100 further includes a screw 184. The screw 184 sequentially passes through the connecting section 112 and the fixing block 12. The setting direction of the screw 184 is the same as the setting direction X of the reflector. The fixing block 12 can move along the setting direction of the screw 184 under the rotation of the screw 184. By means of driving the fixing block 12 to move through the rotation of the screw 184, the movement of the fixing block 12 along the setting direction of the reflector 11 can be precisely controlled, so as to realize the fine adjustment of the height of the suspension member 13 and the member to be detected. Without contacting the ground, it can be quickly and accurately adjusted to the height required for testing. Moreover, since the outer dimensions of the sides of the member to be detected are different, the distance can be adjusted at any time through the screw 184 to meet the requirement of being 0.6 m away from the horizontal reflecting surface.
[0039] Preferably, a ball bearing 16 is provided between the screw 184 and the connecting section 112. The setting of the ball bearing 16 greatly reduces the friction between the screw 184 and the connecting section 112 during rotation, thus making the adjustment process smoother and reducing the operating force.
[0040] Moreover, a limiting block 17 is further provided between the connecting section 112 and the fixing block 12. The limiting block 17 surrounds the outer wall surface of the screw 184. And an internal thread adapted to the screw 184 is provided on the inner wall surface of the limiting block 17 to limit the rotation position of the screw 184. The rotation position of the screw 184 can be precisely limited to prevent the screw 184 from rotating excessively and ensure that the fixing block 12 moves within a predetermined range.
[0041] As Figure 7 shown, the noise testing device 100 further includes a driving assembly 18. The driving assembly 18 is arranged at one end of the screw 184 far from the connecting section 112, and the driving assembly 18 is arranged on the side of the reflector 11 facing the fixing block 12 for driving the rotation of the screw 184. The introduction of the driving assembly 18 can realize the automatic operation of the noise testing device 100, reduce manual intervention, and improve the testing efficiency. Moreover, the driving assembly 18 can precisely control the rotation speed and rotation direction of the screw 184, so as to realize the precise control of the position of the suspension member 13. Specifically, the forward and reverse rotations of the driving member 181 can be driven to realize the up and down movement of the fixing block 12.
[0042] Specifically, the driving assembly 18 includes a driving member 181, a driving gear 182, and a driven gear 183. The driving shaft of the driving member 181 is connected to the driving gear 182. The driving gear 182 and the driven gear 183 mesh with each other, and the central axis of the driving gear 182 is perpendicular to the central axis of the driven gear 183. The driven gear 183 is connected to the screw 184. Therefore, through the perpendicular cooperation of the driving gear 182 and the driven gear 183, the rotation direction of the driving member 181 can be changed, and it can be converted into the linear rotation of the screw 184 to achieve the precise adjustment of the fixed block 12 in the vertical direction. Moreover, the stability of gear transmission is relatively high, reducing the vibration during transmission and improving the stability of the entire noise testing device 100.
[0043] As Figure 5 shown, the noise testing device 100 further includes a fixing member 19. A fixing groove 113 is provided on the reflection plate 11. The fixing groove 113 is provided at both ends of the reflection plate 11 along its setting direction. The fixing member 19 is embedded in the fixing groove 113 to fix the position of the reflection plate 11. In this embodiment, the fixing member 19 is welded to the steel frame inside the semi-anechoic chamber, which can ensure the stability and reliability of the noise testing device 100 and avoid problems such as tipping over.
[0044] As Figure 1 and Figure 3 shown, along the direction X perpendicular to the setting direction of the reflection plate, a plurality of reflection plates 11 are arranged in sequence. The sequential arrangement of the plurality of reflection plates 11 can enhance the reflection effect of sound waves, improve the acoustic performance of the testing site, and make the noise test results more accurate. Moreover, by increasing the number of reflection plates 11, the testing area can be expanded, enabling larger-sized test pieces to be tested in the same test environment.
[0045] The above description has fully disclosed the specific implementation manners of the present application. It should be noted that any modifications made by those skilled in the art to the specific implementation manners of the present application do not depart from the scope of the claims of the present application. Correspondingly, the scope of the claims of the present application is not limited solely to the foregoing specific implementation manners.
Claims
1. A noise testing device, characterized in that: The noise testing device is used for suspending a part to be detected and performing a noise test on it. The noise testing device comprises a reflecting plate, a fixing block and a hanging member. The setting direction of the reflecting plate is perpendicular to the ground. The fixing block is clamped between the two reflecting plates. The hanging member is set on the side surface of the reflecting plate away from the fixing block to suspend the part to be detected. The hanging member is connected to the fixing block. The fixing block can drive the part to be detected to move along the setting direction of the reflecting plate and along the horizontal direction perpendicular to the reflecting plate. The distance between the back plate of the part to be detected and the reflecting plate is not greater than the thickness of the hanging member.
2. The noise testing device according to claim 1, characterized in that: The reflector is provided with a slide groove, the setting direction of the slide groove is the same as the setting direction of the reflector, one end of the suspension member is embedded in the slide groove and connected to the fixed block, and the slide groove is used to limit the moving direction of the suspension member.
3. The noise testing device according to claim 2, characterized in that: Along a direction perpendicular to the setting direction of the reflecting plate, the cross-sectional dimension of the hanging member is larger than the cross-sectional dimension of the sliding groove.
4. The noise testing device according to claim 2, characterized in that: The noise testing device also includes a shock absorbing member and a connecting rod, wherein the connecting rod is arranged in the slide groove and connected to the fixed block, the shock absorbing member and the suspension member are respectively arranged at both ends of the connecting rod, and the shock absorbing member is arranged below the suspension member to reduce vibration of the part to be tested.
5. The noise testing device according to claim 4, characterized in that: Along a direction perpendicular to the setting direction of the reflecting plate, the cross-sectional dimension of the connecting rod is not greater than the cross-sectional dimension of the sliding groove.
6. The noise testing device according to claim 1, characterized in that: The reflecting plate is provided with a connecting section, and the connecting section is arranged at the top end of the reflecting plate along its setting direction. The noise testing device also includes a screw rod, and the screw rod passes through the connecting section and the fixed block in sequence. The setting direction of the screw rod is the same as the setting direction of the reflecting plate. The fixed block can move along the setting direction of the screw rod under the rotation of the screw rod.
7. The noise testing device according to claim 6, characterized in that: A ball bearing is provided between the screw and the connecting section, a limit block is provided between the connecting section and the fixed block, the limit block is arranged around the outer wall surface of the screw, and an internal thread matched with the screw is provided on the inner wall surface of the limit block to limit the rotation position of the screw.
8. The noise testing device according to claim 6, characterized in that: The noise testing device further comprises a driving assembly, which is arranged at an end of the screw rod away from the connecting section and at a side of the reflecting plate facing the fixing block, so as to drive the screw rod to rotate.
9. The noise testing device according to claim 8, characterized in that: The driving assembly includes a driving member, a driving gear and a driven gear. The driving shaft of the driving member is connected to the driving gear. The driving gear and the driven gear are meshed with each other. The central axis of the driving gear is perpendicular to the central axis of the driven gear. The driven gear is connected to the screw.
10. The noise testing device according to claim 1, characterized in that: The noise testing device further comprises a fixing member, the reflecting plate is provided with fixing grooves, the fixing grooves are arranged at both ends of the reflecting plate along the setting direction thereof, and the fixing member is embedded in the fixing grooves to fix the position of the reflecting plate.