House wall sound insulation performance tester

Abstract

The utility model discloses a house wall sound insulation performance tester, which is characterized in that a cam mechanism drives a dynamic push rod through rotary motion, and regular impact force is generated by utilizing the contact between a periodically changing cam profile and an abutting wafer. The elastic reset assembly provides stable elastic abutting through a spiral spring, it is ensured that the dynamic push rod can be rapidly reset after being impacted each time, and therefore continuous and stable impact action is achieved. An impact hammer arranged at the tail end of a dynamic push rod of the impact generation device can simulate impact sounds with different intensities and frequencies, and a sound source generation module further enhances the complexity of a test environment and simulates a noise source in a real environment. Not only can real impact sound be simulated, but also the impact strength can be adjusted through the detachable impact hammer head, and the test requirements of different wall materials can be met. Meanwhile, the structural design of the main frame ensures the overall stability and the test accuracy, so that the test result is more reliable and repeatable.

Description

Technical Field

[0001] This utility model relates to the technical field of wall sound insulation performance testing equipment, and in particular to a house wall sound insulation performance testing instrument. Background Technology

[0002] As the construction industry places increasing demands on the quality of living environments, the sound insulation performance of walls has become a crucial indicator of building quality. Existing sound insulation testing methods typically rely on manual tapping or single mechanical devices to simulate sound sources, which suffers from problems such as unstable testing force, limited sound source types, and poor repeatability of test results. For example, traditional testing equipment often uses fixed-frequency impact devices, which cannot realistically simulate the diverse impact sounds produced by different objects (such as moving furniture or falling heavy objects) on walls in daily life, leading to discrepancies between test data and actual sound insulation effects. Furthermore, most equipment lacks a coordinated control mechanism between the sound source and the detection end, requiring the deployment of sound source emission and noise acquisition devices on both sides of the wall during testing. This complex operation process makes it difficult to ensure the synchronization of sound wave propagation, affecting test accuracy.

[0003] In existing technologies, some testing instruments achieve impact action through springs or pneumatic structures, but their reset mechanisms are susceptible to mechanical wear, leading to elastic failure or stroke deviation after long-term use, resulting in fluctuations in impact force. Furthermore, the fixed materials and structures of traditional impact heads cannot flexibly adapt to different testing scenarios; for example, they cannot distinguish between the simulation effects of high-frequency impact sounds (such as metal collisions) and low-frequency vibration sounds (such as rubber impacts). In addition, the overall structure of the equipment is loose and bulky, making it difficult to deploy flexibly in confined spaces or complex architectural environments, thus limiting its application scope.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a sound insulation performance tester for house walls, which solves the problem that the existing sound insulation testers have a simple structure and large deviation in test results.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a house wall sound insulation performance tester, including a main frame, and further including a cam mechanism, an elastic reset component, and an impact generating device disposed on the base plate of the main frame; the cam mechanism is linked to a drive mechanism through a connecting shaft, and the elastic reset component includes a limiting sleeve and a helical spring nested inside the limiting sleeve; the impact generating device includes a dynamic push rod, a retaining disc, and a detachable impact hammer, the dynamic push rod passes through the wall plate of the main frame and is fixed with the retaining disc, one end face of the retaining disc is in contact with the cam, and the other end face is elastically abutted against the inner wall of the limiting sleeve through the helical spring; a sound source generating module is integrated on the outside of the main frame, and an impact hammer for simulating impact sound is disposed at the extended end of the dynamic push rod, the impact hammer and the sound source generating module being arranged in the same direction.

[0007] In one embodiment of the present invention, the limiting sleeve is provided with a guide slide structure, the inner wall of which forms a clearance fit with the outer diameter of the helical spring, and the end of the sleeve is provided with an annular limiting flange to prevent the spring from dislodging. The axis of the guide slide structure is collinear with the motion trajectory of the dynamic push rod.

[0008] In one embodiment of the present invention, the two ends of the connecting shaft are mounted on the side wall of the main frame via angular contact bearings, and the middle of the shaft is provided with a cam mounting section with keyway engagement.

[0009] In one embodiment of the present invention, the drive mechanism includes a speed-regulating motor and a transmission assembly. The output shaft of the speed-regulating motor forms a closed-loop transmission system with the connecting shaft through a synchronous pulley set. The transmission assembly is covered with a noise-reducing protective cover.

[0010] In one embodiment of the present invention, a counterweight base box is fixedly connected to the bottom of the main frame, and a modular counterweight unit is provided inside the counterweight base box. The speed-regulating motor is fixed to the internal frame of the counterweight base box by a shock-absorbing bracket.

[0011] In one embodiment of this utility model, the detachable impact hammer head adopts a quick-change buckle structure.

[0012] In one embodiment of this utility model, the supporting disc and the dynamic push rod are integrally formed, and the dynamic push rod adopts a stepped shaft structure.

[0013] In one embodiment of the present invention, a signal transmitting module and a noise analysis module are provided on the sound source generating module (5) side. The signal transmitting module integrates a frequency sweep signal generator, and the noise analysis module includes a directional microphone array and a spectrum analysis unit. The transmitting module and the receiving module achieve time-domain synchronization through an encrypted wireless channel.

[0014] As described above, the house wall sound insulation performance tester of this utility model has the following beneficial effects: Utilizing the linkage between the cam mechanism and the drive mechanism, the dynamic push rod and the supporting disc in the impact generating device are activated. Through the elastic action of the helical spring, the detachable impact hammer head can simulate impacts on the wall at a set frequency and force. Simultaneously, the sound source generating module integrated on the outside of the main frame is arranged in the same direction as the impact hammer head. On the one hand, it can generate simulated sound signals at the moment of impact, simulating not only the impact sound source in real life but also ensuring accurate transmission and reception of the sound signal; on the other hand, it can simulate environmental noise. Furthermore, the presence of the elastic reset component allows the impact hammer head to automatically reset to its initial position after each impact, preparing for the next impact, reducing the need for manual intervention, further simplifying the operation process and improving the automation level of the test. The integrated design concept ensures the continuity and accuracy of the testing process, thereby improving testing efficiency and reliability. In summary, the design of the house wall sound insulation performance tester not only improves the accuracy and efficiency of the test but also enhances the convenience of user operation, providing the construction industry with an efficient and practical tool for evaluating wall sound insulation performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the house wall sound insulation performance tester provided by this utility model;

[0017] Figure 2 A partial structural schematic diagram of the house wall sound insulation performance tester provided by this utility model.

[0018] Component designation explanation

[0019] 1. Main frame; 2. Cam mechanism; 21. Connecting shaft; 22. Cam; 3. Elastic reset assembly; 31. Limiting sleeve; 32. Helical spring; 4. Impact generating device; 41. Dynamic push rod; 42. Holding disc; 43. Impact hammer; 5. Sound source generating module; 6. Transmission assembly; 7. Counterweight base box; 71. Counterweight unit. Detailed Implementation

[0020] This utility model provides a sound insulation performance tester for building walls. To make the purpose, technical solution and effect of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0021] In the description of this utility model, it should be understood that the terms "up, down, left, right" and other indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Please see Figure 1 and Figure 2 This utility model provides a sound insulation performance tester for building walls. The tester includes a main frame 1, a cam mechanism 2, an elastic reset component 3, and an impact generating device 4, all mounted on the base plate of the main frame 1. The cam mechanism 2 is linked to a drive mechanism via a connecting shaft 21. The elastic reset component 3 includes a limiting sleeve 31 and a helical spring 32 nested inside the limiting sleeve 31. The impact generating device 4 includes a dynamic push rod 41, a retaining disc 42, and a detachable impact hammer 43. The dynamic push rod 41 passes through the wall panel of the main frame 1 and is fixed to the retaining disc 42. One end of the retaining disc 42 maintains contact with the cam 22, and the other end elastically abuts against the inner wall of the limiting sleeve 31 via the helical spring 32. A sound source generating module 5 is integrated on the outer side of the main frame 1. The extended end of the dynamic push rod 41 is equipped with an impact hammer 43 for simulating impact sounds. The impact hammer 43 and the sound source generating module 5 are arranged in the same direction. Understandably, the building wall sound insulation performance tester can not only simulate real impact sounds, but also adjust the impact intensity through the detachable impact hammer head 43 to adapt to the testing needs of different wall materials.

[0023] The working principle of the building wall sound insulation performance tester is as follows: The cam mechanism 2 drives the dynamic push rod 41 through rotational motion. The periodically changing profile of the cam 22 contacts the holding disc 42, generating a regular impact force. The elastic reset assembly 3 provides stable elastic contact through the helical spring 32, ensuring that the dynamic push rod 41 can quickly reset after each impact, thereby achieving continuous and stable impact action. The impact hammer 43 configured at the end of the dynamic push rod 41 of the impact generating device 4 can simulate impact sounds of different intensities and frequencies, while the sound source generating module 5 further enhances the complexity of the test environment, simulating noise sources in the real environment.

[0024] The limiting sleeve 31 is equipped with a guide slide structure, the inner wall of which forms a clearance fit with the outer diameter of the helical spring 32. The sleeve end has an annular limiting flange to prevent spring dislocation. The axis of the guide slide structure is collinear with the movement trajectory of the dynamic push rod 41. The clearance fit between the guide slide structure of the limiting sleeve 31 and the helical spring 32 ensures the linearity and stability of the dynamic push rod 41's movement, avoiding spring offset or jamming. The annular limiting flange at the sleeve end effectively prevents spring dislocation, further improving the reliability and service life of the device. The collinearity of the axis of the guide slide structure with the movement trajectory of the dynamic push rod 41 ensures uniform transmission of impact force, avoiding test errors caused by eccentric movement.

[0025] The connecting shaft 21 is mounted on the side wall of the main frame 1 at both ends via angular contact bearings, and a keyway-fitted cam mounting section is provided in the middle of the shaft. The mounting of the connecting shaft 21 to the side wall of the main frame 1 via angular contact bearings ensures high-precision rotation and stability of the shaft. The keyway-fitted cam mounting section in the middle of the shaft effectively transmits torque and prevents slippage or loosening of the cam 22 during rotation. Therefore, the transmission efficiency and reliability of the cam mechanism 2 are improved, providing a guarantee for the stable impact of the dynamic push rod 41.

[0026] Please see Figure 1 The main frame 1 has a counterweight base box 7 fixedly connected to its bottom. The counterweight base box 7 contains a modular counterweight unit 71. The speed-regulating motor is fixed to the internal frame of the counterweight base box 7 via a shock-absorbing bracket. The counterweight base box 7 at the bottom of the main frame 1 enhances the stability of the device through the modular counterweight unit 71, effectively resisting vibrations caused by impact and ensuring the accuracy of test results. The speed-regulating motor is fixed to the internal frame of the counterweight base box via a shock-absorbing bracket, further reducing the impact of vibration on test accuracy and extending the motor's service life.

[0027] The drive mechanism includes a speed-regulating motor and a transmission assembly 6. The output shaft of the speed-regulating motor forms a closed-loop transmission system with the connecting shaft 21 via a synchronous pulley set. The transmission assembly 6 is covered with a noise-reducing protective cover. The drive mechanism employs a closed-loop transmission system with a speed-regulating motor and synchronous pulley set, enabling precise adjustment of the impact frequency to meet the testing requirements of different wall materials and sound insulation performance. The noise-reducing protective cover of the transmission assembly 6 not only reduces noise during device operation but also provides safety protection, preventing external interference or accidental contact by operators. In this embodiment, the noise-reducing protective cover is located inside the counterweight base box 7, further aiding in noise reduction.

[0028] Furthermore, the detachable impact hammer 43 employs a quick-change snap-fit ​​structure, facilitating rapid replacement of hammers made of different materials or with varying weights to adapt to different testing scenarios. Different materials of the impact hammer 43 produce different impact sounds; for example, hard metal hammers produce high-frequency, sharp sounds, while rubber or soft material hammers produce low-frequency, more muffled sounds. This design not only enhances the flexibility and versatility of the device but also enables testing to simulate a variety of impact sounds closer to real-world environments, thus providing richer data support for a comprehensive evaluation of wall sound insulation performance. Simultaneously, the quick-change snap-fit ​​structure reduces test preparation time and improves work efficiency.

[0029] The abutting disc 42 and the dynamic push rod 41 are integrally formed, ensuring the strength and rigidity of the connection and avoiding impact force attenuation or test errors caused by loose connection; while the dynamic push rod 41 adopts a stepped shaft structure, which optimizes mechanical properties, improves bending strength and durability, and can withstand repeated impact forces.

[0030] Preferably, the building wall sound insulation performance tester includes a signal transmitting module and a noise analysis module located on the sound source generating module (5). The signal transmitting module integrates a sweep frequency signal generator, which can generate sound signals with a wide frequency range and accurately simulate sound source environments of different frequencies. The noise analysis module includes a directional microphone array and a spectrum analysis unit, which can efficiently collect and analyze sound signals on both sides of the wall. Combined with the spectrum analysis unit, the frequency characteristics of the sound signals are evaluated in detail, thereby comprehensively quantifying the sound insulation performance of the wall. The transmitting module and the receiving module achieve time-domain synchronization through an encrypted wireless channel, ensuring the stability and anti-interference capability of signal transmission. This synchronization mechanism not only improves the accuracy of test data but also makes the testing process more efficient and reliable. The modular system design also enhances the flexibility and scalability of the device, making it easy to expand and optimize functions according to different testing needs.

[0031] In summary, the sound insulation performance tester for building walls of this invention uses a drive mechanism to rotate a cam 22. The periodic changes in the cam profile push a retaining disc 42, causing the dynamic push rod 41 to reciprocate horizontally. When the protruding part of the cam 22 acts on the retaining disc 42, the helical spring 32 is compressed and stores energy, causing the push rod to accelerate the impact hammer 43 to impact the wall. When the cam 22 retracts, the spring force drives the push rod to reset, forming periodic impacts. This process achieves precise control of impact energy and frequency through the geometric design of the cam mechanism 2, and, combined with the linear buffering characteristics of the elastic reset component 3, ensures that the impact force is uniform and controllable for each impact. The sound source generation module 5 and the mechanical impact hammer 43 are arranged in the same direction, ensuring that the sound wave propagation path is consistent with the structural vibration path, enabling simultaneous detection of the comprehensive sound insulation effect of airborne and solid-borne sound transmission. The detachable impact hammer head 43 design allows for the replacement of hammer heads with different masses or contact surfaces, flexibly simulating impact sources in real-world scenarios such as tool drops and furniture collisions. The integrated sound source module can superimpose environmental noise, speech, and other composite sound fields, significantly enhancing the realism of the test scenario. This device achieves triple gain through a synergistic mechanical-acoustic approach: the motion trajectory control of the cam mechanism 2 ensures reproducible test parameters; the nonlinear stiffness characteristics of the helical spring 32 automatically compensate for impact energy fluctuations; and the acoustic-vibration coupling test mode comprehensively covers the weak points of building sound insulation. This design not only improves testing efficiency but also makes the test results closer to actual usage conditions through multi-dimensional sound source simulation, providing a reliable quantitative basis for building acoustics optimization. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0032] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A house wall sound insulation performance tester comprising a main frame (1), characterized in that, Also include the cam mechanism (2) set in the main frame (1) bottom plate, elastic reset component (3) and impact generating device (4); The cam mechanism (2) is linked with driving mechanism through connecting shaft (21), the elastic reset component (3) includes limit sleeve (31) and the spiral spring (32) nested in the limit sleeve (31) inside;The impact generating device (4) includes dynamic push rod (41), and the resisting disc (42) and detachable impact hammer head (43), the dynamic push rod (41) penetrates the wallboard of main frame (1) and is fixed with the resisting disc (42), one end surface of the resisting disc (42) is in contact with cam (22) type cooperation, the other end surface is formed by the elastic abutment of the inner wall of limit sleeve (31) through spiral spring (32);The main frame (1) outside is integrated with sound source generating module (5), the extension end of dynamic push rod (41) is configured with impact hammer head (43) for simulating impact sound, and the impact hammer head (43) is arranged in the same direction with sound source generating module (5).

2. The house wall sound insulation performance tester according to claim 1, characterized in that, The limit sleeve (31) is provided with a guide slide structure, the inner wall of which is gap-fitted with the outer diameter of the spiral spring (32), and the end of the sleeve is provided with an annular limiting flange to prevent the spring from dislocating, and the axis of the guide slide structure is collinear with the movement track of the dynamic push rod (41).

3. The house wall sound insulation performance tester according to claim 1, characterized in that, The connecting shaft (21) is installed in the side wall of the main frame (1) through angular contact bearings at both ends, and the middle part of the shaft is provided with a cam mounting section matched with a key groove.

4. The house wall sound insulation performance tester according to claim 3, characterized in that, The driving mechanism includes a speed regulation motor and a transmission assembly (6), and the output shaft of the speed regulation motor is connected with the connecting shaft (21) through a synchronous belt wheel set to form a closed-loop transmission system, and the outer cover of the transmission assembly (6) is provided with a noise reduction protective cover.

5. The house wall sound insulation performance tester according to claim 4, characterized in that, The main frame (1) is fixedly connected with a counterweight base box (7) at the bottom, and a modular counterweight unit (71) is arranged in the counterweight base box (7), and the speed regulation motor is fixed on the inner frame of the counterweight base box (7) through a damping support.

6. The house wall sound insulation performance tester according to claim 1, characterized in that, The detachable impact hammer head (43) adopts a quick-change buckle structure.

7. The house wall sound insulation performance tester according to claim 1, characterized in that, The resisting disc (42) and the dynamic push rod (41) are an integral structure, and the dynamic push rod (41) adopts a stepped shaft structure.

8. The house wall sound insulation performance tester according to claim 1, characterized in that, A signal transmitting module is arranged on the side of the sound source generating module (5), and a noise analysis module is arranged on the receiving side, the signal transmitting module is integrated with a sweep signal generator, the noise analysis module includes a directional microphone array and a spectrum analysis unit, and the transmitting module and the receiving module are time-domain synchronized through an encrypted wireless channel.

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