A luggage case soundproofing mat detection bench
The hydraulically driven clamping mechanism forms a closed detection space with the upper and lower soundproof covers. Combined with a three-dimensional sound sensor, it solves the problems of sound wave leakage and data error in traditional detection equipment, and improves the accuracy and efficiency of luggage soundproof pad detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI XUYANG HUALEI AUTO PARTS CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional luggage sound insulation pad testing equipment cannot achieve a completely sealed testing space, resulting in sound wave leakage and external noise interference. Furthermore, the sealing structure is prone to aging, and manual operation leads to large data errors.
The clamping mechanism driven by a hydraulic cylinder works in conjunction with the upper and lower soundproof covers to form a closed detection space. Combined with three-dimensional distributed sound sensors, detection is performed, reducing manual operation.
It achieves the sealing of the enclosed testing space, reduces sound wave leakage and external noise interference, and improves the accuracy and efficiency of testing.
Smart Images
Figure CN224594577U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of sound insulation pad testing technology, specifically to a luggage sound insulation pad testing stand. Background Technology
[0002] With the automotive industry's increasing demands for ride comfort, the accurate testing of the sound insulation performance of trunk sound insulation pads, as key acoustic components, has become a key technological focus. Traditional testing benches often use a single hydraulic cylinder drive or manual clamping method, making it difficult to achieve complete sealing of the testing space. For example, some equipment only uses a simple pressure plate to contact the sound insulation pad, leading to sound wave leakage. External environmental noise (such as workshop background noise) significantly interferes with the test results, with sound insulation measurement errors reaching 3-5 dB. In addition, the sealing structure often uses ordinary rubber gaskets, which are prone to aging and deformation after long-term use, requiring frequent replacement. Most testing processes rely on manual operation, such as manually adjusting the clamping force and manually recording sensor data, and human error leads to large data dispersion. Utility Model Content
[0003] 1. The technical problem to be solved by the utility model:
[0004] This utility model provides a luggage sound insulation pad testing stand to solve the technical problems existing in the background art.
[0005] 2. Technical Solution:
[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: a luggage sound insulation pad testing stand, including a frame, a worktable horizontally arranged at the upper end of the frame, a support frame vertically arranged on the worktable, a pressing mechanism arranged on the support frame, a receiving chamber arranged at the output end of the pressing mechanism, a movable base arranged on the worktable, and a sound source system arranged below the worktable. The movable base is used to place the sound insulation pad body. When the movable base moves to directly below the receiving chamber, the pressing mechanism drives the receiving chamber to move down and fit and seal with the movable base, forming a closed testing space. The sound source system emits sound waves of a set frequency and intensity, and the sound waves penetrate the sound insulation pad body and enter the receiving chamber.
[0007] Preferably, the clamping mechanism includes a mounting beam, which is horizontally fixed to the top of the support frame. A hydraulic cylinder is installed in the middle of the mounting beam, and the piston rod end of the hydraulic cylinder is fixedly connected to the upper surface of the connecting plate. The receiving chamber is installed on the lower surface of the connecting plate.
[0008] Preferably, the receiving chamber includes a hollow upper soundproof cover and sound sensors. The top of the upper soundproof cover is sealed to the connecting plate, and its bottom edge is provided with an annular sealing gasket. Several sound sensors are fixed to the inner wall of the upper soundproof cover and located above the soundproof gasket body.
[0009] Preferably, the movable base includes a material carrier platform, the material carrier platform is provided with a positioning groove that cooperates with the sound insulation pad body, one end of the material carrier platform is provided with a handle, a guide rail is horizontally fixed on the upper surface of the worktable, and the slider is fixedly connected to the bottom of the material carrier platform and slidably engaged on the guide rail.
[0010] Preferably, the sound source system includes a second hydraulic cylinder fixed on the frame, the piston rod of the second hydraulic cylinder is connected to the bottom of the lower soundproof cover, a guide groove is provided on the workbench, the guide groove is located below the receiving chamber, the lower soundproof cover is slidably installed in the guide groove, and a sound source generator is fixed inside the lower soundproof cover.
[0011] Preferably, guide shafts are vertically fixed on both sides of the upper surface of the connecting plate, and two guide cylinders are fixed on the mounting beam accordingly. The guide shafts are slidably inserted into the guide cylinders.
[0012] 3. Beneficial effects:
[0013] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0014] This invention uses a hydraulic cylinder to drive the upper and lower soundproof covers to press the soundproof pad body, ensuring synchronous compression and sealing of the upper and lower cavities to prevent sound leakage. Simultaneously, the upper and lower soundproof covers, together with the loading platform, form a closed cavity, replicating the actual installation state of the soundproof pad inside a suitcase. Several sound sensors are distributed in three dimensions to collect transmitted sound waves from different angles, avoiding the randomness of single-point sampling and improving detection accuracy. The movable base of this invention adopts a sliding rail design, reducing the time spent on loading and unloading the soundproof pad, thus improving efficiency compared to traditional fixed platforms. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the pressing mechanism of this utility model;
[0017] Figure 3 This is a schematic diagram of the receiving chamber structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the sound source system structure of this utility model;
[0019] Figure 5 This is a schematic diagram of the lower soundproof cover structure of this utility model;
[0020] Figure 6 This is a schematic diagram of the sound source generator structure of this utility model;
[0021] Figure 7 This is a schematic diagram showing the lower soundproof cover and the material carrier platform of this utility model in contact.
[0022] Figure label:
[0023] 1. Frame; 2. Workbench; 3. Support frame; 4. Clamping mechanism; 41. Mounting beam; 42. Hydraulic cylinder one; 43. Connecting plate; 44. Guide shaft; 45. Guide cylinder; 5. Receiving chamber; 51. Upper soundproof cover; 52. Sound sensor; 6. Movable base; 61. Loading platform; 62. Positioning groove; 63. Handle; 64. Guide rail; 65. Slider; 7. Sound insulation pad body; 8. Sound source system; 81. Hydraulic cylinder two; 82. Lower soundproof cover; 83. Guide groove; 84. Sound source generator. Detailed Implementation
[0024] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Example
[0029] See attached document Figures 1-7 A luggage sound insulation pad testing stand includes a frame 1, a workbench 2 horizontally arranged at the upper end of the frame 1, a support frame 3 vertically arranged on the workbench 2, a pressing mechanism 4 arranged on the support frame 3, a receiving chamber 5 arranged at the output end of the pressing mechanism 4, a movable base 6 arranged on the workbench 2, and a sound source system 8 arranged below the workbench 2. The movable base 6 is used to place the sound insulation pad body 7. When the movable base 6 moves to directly below the receiving chamber 5, the pressing mechanism 4 drives the receiving chamber 5 to move down and fit and seal with the movable base 6 to form a closed testing space. The sound source system 8 emits sound waves of a set frequency and intensity, and the sound waves penetrate the sound insulation pad body 7 and enter the receiving chamber 5.
[0030] The clamping mechanism 4 includes a mounting beam 41, which is horizontally fixed to the top of the support frame 3. A hydraulic cylinder 42 is mounted in the middle of the mounting beam 41, and the piston rod end of the hydraulic cylinder 42 is fixedly connected to the upper surface of the connecting plate 43. The receiving chamber 5 is mounted on the lower surface of the connecting plate 43. Guide shafts 44 are vertically fixed on both sides of the upper surface of the connecting plate 43, and two guide cylinders 45 are correspondingly fixed on the mounting beam 41. The guide shafts 44 are slidably inserted into the guide cylinders 45.
[0031] The receiving chamber 5 includes a hollow upper soundproof cover 51 and sound sensors 52. The top of the upper soundproof cover 51 is sealed to the connecting plate 43, and its bottom edge is provided with an annular sealing gasket. Several sound sensors 52 are fixed to the inner wall of the upper soundproof cover 51 and are located above the soundproof pad body 7.
[0032] The movable base 6 includes a material loading platform 61, on which a positioning groove 62 is provided to cooperate with the sound insulation pad body 7. A handle 63 is provided at one end of the material loading platform 61. A guide rail 64 is horizontally fixed on the upper surface of the worktable 2. A slider 65 is fixedly connected to the bottom of the material loading platform 61 and slidably engaged with the guide rail 64.
[0033] The sound source system 8 includes a second hydraulic cylinder 81 fixed on the frame 1. The piston rod of the second hydraulic cylinder 81 is connected to the bottom of the lower soundproof cover 82. A guide groove 83 is provided on the worktable 2, located below the receiving chamber 5. The lower soundproof cover 82 is slidably installed in the guide groove 83. A sound source generator 84 is fixed inside the lower soundproof cover 82. The sound source generator 84 can be an electric loudspeaker, a piezoelectric sound source generator, or an electromagnetic sound source generator.
[0034] Working principle:
[0035] The operator places the sound insulation pad body 7 into the positioning groove 62 of the movable base 6. The size of the positioning groove 62 perfectly matches the edge contour of the sound insulation pad body 7, which can initially limit the sound insulation pad and prevent displacement during placement. Then, the operator holds the handle 63 and pushes the loading platform 61. At this time, the slider 65 slides in a straight line along the guide rail 64. The sliding process is smooth and without jamming until the movable base 6 moves precisely to the bottom of the receiving chamber 5. The edge of the loading platform 61 contacts the positioning block on the worktable 2 to achieve mechanical positioning and ensure that the center of the sound insulation pad body 7 is aligned with the center of the receiving chamber 5.
[0036] Upon receiving a control signal, the hydraulic cylinder 42 of the clamping mechanism 4 is activated, and the piston rod pushes the connecting plate 43 vertically downward. During the downward movement, the guide shafts 44 on both sides slide synchronously along the guide cylinder 45 to ensure that the connecting plate 43 moves smoothly downward. When the bottom of the upper soundproof cover 51 of the receiving chamber 5 approaches the loading platform 61, the annular sealing gasket begins to contact the edge of the surface of the soundproof gasket body 7. As the hydraulic cylinder 42 continues to apply pressure, the sealing gasket is compressed, forming a completely sealed detection space. At this time, the pressure sensor feedback pressure value stabilizes within the preset range, and the hydraulic cylinder 42 stops operating.
[0037] Hydraulic cylinder 81 of the sound source system 8 starts synchronously with hydraulic cylinder 42. The piston rod drives the lower soundproof cover 82 to move vertically upward along the guide groove 83 until the top of the lower soundproof cover 82 is in contact with the lower surface of the loading platform 61. The sealing strip between the contact surfaces is compressed to form a closed structure at the lower end. Then, the sound source generator 84 emits a sound signal according to the preset program. The sound waves penetrate the sound-permeable holes on the workbench 2 and the sound-insulating pad body 7 in sequence, and finally enter the upper soundproof cover 51.
[0038] Multiple sound sensors 52 are evenly distributed at different heights and radial positions within the upper soundproof enclosure 51 to collect sound wave signals in real time. The data is transmitted to the control system via signal lines, and the system automatically calculates the sound insulation level and generates a test report. After the test is completed, the piston rod of hydraulic cylinder 42 moves upward, causing the receiving chamber 5 to reset; the piston rod of hydraulic cylinder 81 moves downward, causing the lower soundproof enclosure 82 to return to its initial position; the operator pulls the handle 63 to move the movable base 6 out of the test area, removes the sound insulation pad body 7, and completes a single test.
[0039] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A test stand for testing sound insulation pads in suitcases, comprising a frame (1), characterized in that: A workbench (2) is horizontally arranged at the upper end of the frame (1). A support frame (3) is vertically arranged on the workbench (2). A pressing mechanism (4) is arranged on the support frame (3). A receiving chamber (5) is arranged on the output end of the pressing mechanism (4). A movable base (6) is arranged on the workbench (2). A sound source system (8) is arranged below the workbench (2). The movable base (6) is used to place the sound insulation pad body (7). The movable base (6) moves to the bottom of the receiving chamber (5). The pressing mechanism (4) drives the receiving chamber (5) to move down and fit and seal with the movable base (6) to form a closed detection space. The sound source system (8) emits sound waves of a set frequency and intensity. The sound waves penetrate the sound insulation pad body (7) and enter the receiving chamber (5).
2. The luggage soundproofing mat test bench of claim 1, wherein: The clamping mechanism (4) includes a mounting beam (41), which is horizontally fixed to the top of the support frame (3). A hydraulic cylinder (42) is installed in the middle of the mounting beam (41). The piston rod end of the hydraulic cylinder (42) is fixedly connected to the upper surface of the connecting plate (43). The receiving chamber (5) is installed on the lower surface of the connecting plate (43).
3. The luggage soundproofing mat test bench of claim 1, wherein: The receiving chamber (5) includes a hollow upper soundproof cover (51) and sound sensors (52). The top of the upper soundproof cover (51) is sealed to the connecting plate (43), and its bottom edge is provided with an annular sealing gasket. Several sound sensors (52) are fixed to the inner wall of the upper soundproof cover (51) and located above the soundproof pad body (7).
4. The luggage soundproofing mat test bench of claim 1, wherein: The movable base (6) includes a loading platform (61), on which a positioning groove (62) is provided to cooperate with the sound insulation pad body (7). A handle (63) is provided at one end of the loading platform (61). A guide rail (64) is horizontally fixed on the upper surface of the worktable (2). A slider (65) is fixedly connected to the bottom of the loading platform (61) and slidably fitted on the guide rail (64).
5. The luggage soundproofing mat test bench of claim 1, wherein: The sound source system (8) includes a hydraulic cylinder two (81) fixed on the frame (1). The piston rod of the hydraulic cylinder two (81) is connected to the bottom of the lower soundproof cover (82). A guide groove (83) is provided on the workbench (2). The guide groove (83) is located below the receiving chamber (5). The lower soundproof cover (82) is slidably installed in the guide groove (83). A sound source generator (84) is fixed inside the lower soundproof cover (82).
6. The luggage liner detection rig of claim 2, wherein: The upper surface of the connecting plate (43) is vertically fixed with guide shafts (44) on both sides, and two guide cylinders (45) are fixed on the mounting beam (41) respectively. The guide shafts (44) are slidably inserted into the guide cylinders (45).