Noise reduction type test bench

Abstract

The utility model relates to the technical field of experimental equipment, and provides a noise reduction type test bench which comprises a box body, the top of the box body is provided with a vibration damper plate, two sides of the top of the vibration damper plate are fixedly provided with a plurality of fixing parts which are symmetrically arranged, one side of the outer wall of each fixing part is fixedly connected with a fixing plate, and one end of each fixing plate is fixedly connected with a noise reduction box. The number of the noise reduction boxes is two, the two noise reduction boxes are located on the two sides of the top of the damping plate correspondingly, a threaded base is arranged on the top of the fixing piece, a damping assembly is assembled in the threaded base in a threaded connection mode, sliding bases are fixedly installed on the side walls of the two ends of the box body, and noise reduction assemblies are slidably arranged on the surfaces of the sliding bases. Noise generated by an experiment machine in the box body can be adsorbed, noise transmission is greatly reduced, the frequency of vibration with the box body in the noise transmission process can be reduced through free stretching and retracting of the damping rods in the fixing sleeves of the damping assemblies, and therefore the working stability of the experiment table plate is improved, and the working efficiency is improved. And a worker can better carry out experiment work.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, and specifically to a noise reduction test bench. Background Art

[0002] The test bench is a table used by hospitals, schools, chemical plants, scientific research institutes and other enterprises and institutions for experimental testing and instrument storage. It is suitable for related vibration tests on automotive parts, electronics, furniture, gifts, ceramics, packaging and other products. With the continuous advancement of science and technology, the demand for the use of test benches is getting higher and higher. When the test bench is working, the experimental machine inside the box will produce a certain amount of noise, which undoubtedly affects the work efficiency of the experimenter. What's more serious is that the vibration generated by the noise will affect the accuracy of the experimental results. Therefore, the existing test bench needs to have a noise reduction function.

[0003] After searching, the existing patent (Announcement No.: CN 216224499 U) discloses a noise reduction test bench, which includes a test bench box, a cavity for placing an air pump is arranged inside, and a connection port is opened on one side so that the cavity is connected to the outside world; a muffler is arranged in the cavity of the test bench box to absorb the sound energy in the cavity; a door is connected to the test bench box to open or cover the connection port; the muffler includes: a first muffler arranged on the side opposite to the connection port, a second muffler arranged on the side perpendicular to the connection port, a third muffler arranged on the inner bottom surface of the cavity, and a fourth muffler arranged on the inner top surface of the cavity; wherein the first muffler, the second muffler, the third muffler and the fourth muffler are all detachably connected to the test bench box. The present application has the effect of reducing the impact of the noise generated by the air pump arranged in the test bench box on the staff when it is working.

[0004] However, in the implementation of relevant technologies, the following problems were found: the above-mentioned test bench only reduces the noise generated by the experimental equipment inside the box through the sound-absorbing plate, and its noise reduction effect is not good. After the noise is generated in the box, it will diffuse to the outside of the box in multiple directions during the propagation process and resonate with the box. While generating vibrations, new noise will also be generated, which reduces the stability of the test bench and brings work troubles to the experimenters. Utility Model Content

[0005] The utility model provides a noise reduction test bench, which solves the problems in the above background technology that the existing test bench has poor noise reduction effect and is prone to resonance of the test bench, thus affecting the stability of the test bench.

[0006] The technical solution of the utility model is as follows: a noise reduction test bench, comprising a box body, a shock-absorbing plate is provided on the top of the box body, a plurality of symmetrically arranged fixing parts are fixedly installed on both sides of the top of the shock-absorbing plate, a fixing plate is fixedly connected to one side of the outer wall of the fixing part, a noise reduction box is fixedly connected to one end of the fixing plate, the number of the noise reduction boxes is two, and the two noise reduction boxes are respectively located on both sides of the top of the shock-absorbing plate, a threaded seat is provided on the top of the fixing part, a shock-absorbing assembly is threadedly assembled in the threaded seat, sliding seats are fixedly installed on the side walls at both ends of the box body, and the noise reduction assembly is slidably arranged on the surface of the sliding seat.

[0007] Preferably, the noise reduction assembly comprises a noise reduction plate, a sound absorbing plate and a panel, the sound absorbing plate is located between the noise reduction plate and the panel, the contact surfaces of the noise reduction plate, the sound absorbing plate and the panel are fixedly bonded, and the panel is the outermost structure.

[0008] Preferably, the surface of the noise reduction plate is provided with a plurality of noise reduction corrugations, and the surface of the sound absorbing plate is provided with a plurality of sound absorbing holes arranged at equal intervals.

[0009] Preferably, both side walls of the noise reduction plate, the sound absorbing plate and the panel are provided with sliding grooves that match the sliding seat, and the noise reduction component is slidably connected to the sliding seat through the sliding grooves.

[0010] Preferably, the shock absorbing assembly comprises a shock absorbing rod, a fixed sleeve is movably sleeved on the outer wall of the shock absorbing rod, and mounting threads are provided on the outer walls at both ends of the shock absorbing rod.

[0011] Preferably, the bottom end of the shock absorbing rod is threadedly connected to the base via a mounting thread, the base is arranged at the bottom of the box, and a plurality of supporting feet are fixedly mounted on the bottom of the base.

[0012] Preferably, the top end of the shock absorbing rod is threadedly mounted on the shock absorbing plate via a threaded seat, a threaded hole matching the mounting thread is provided in the threaded seat, and the top end of the shock absorbing rod is screwed into the threaded hole and extends upward.

[0013] Preferably, a test bench is provided above the shock absorbing plate, and the top of the test bench is threadedly connected to the mounting thread at the top end of the shock absorbing rod through a plurality of fixing bolts.

[0014] Preferably, three sound guide holes are opened on the surface of the shock absorbing plate, and two of the sound guide holes are respectively located at the bottom center of the noise reduction box.

[0015] Preferably, a plurality of box doors are hingedly mounted on the front side wall of the box body through hinges, and handles are fixedly mounted on the box doors.

[0016] The working principle and beneficial effects of the utility model are:

[0017] 1. In the utility model, the noise generated by the experimental machine in the box can be absorbed by setting the noise reduction component, so as to achieve the purpose of noise reduction. After the noise passes through the noise reduction corrugations on the surface of the noise reduction board, the sudden change of the cross-sectional area is used to attenuate the noise, so that the potential energy of the noise after passing through the sound-absorbing board is small, and the noise is absorbed after passing through a number of sound-absorbing holes on the surface of the sound-absorbing board. The remaining noise after passing through the sound-absorbing holes is reflected back by the panel and subjected to noise reduction treatment again, which greatly reduces the propagation of noise and improves the noise reduction effect.

[0018] 2. In the utility model, by setting the shock-absorbing assembly and utilizing the free extension and retraction of the shock-absorbing rod in the fixed sleeve, the frequency of vibration occurring with the box during noise propagation can be reduced, thereby improving the working stability of the experimental table.

[0019] 3. In the utility model, by adding a shock-absorbing plate under the experimental table, the noise generated by the machine in the box can be effectively introduced into the noise reduction box through the sound guide hole for noise reduction treatment. Since the propagation path of the noise is reduced after passing through the sound guide hole during the upward propagation process, the potential energy of the noise is weakened, and then diffused through the closed noise reduction box, so that the noise rebounds and cancels each other on the inner wall of the noise reduction box, thereby further improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 It is a schematic diagram of the overall structure proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the noise reduction component proposed by the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the shock absorbing assembly proposed by the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the threaded seat proposed by the utility model;

[0025] Figure 5 This is a schematic diagram of the assembly of the test bench plate and the shock absorbing plate proposed by the utility model;

[0026] In the figure: 1. Box body; 2. Shock-absorbing plate; 3. Fixing part; 4. Fixing plate; 5. Noise reduction box; 6. Threaded seat; 7. Shock-absorbing assembly; 701. Shock-absorbing rod; 702. Fixing sleeve; 703. Mounting thread; 8. Sliding seat; 9. Noise reduction assembly; 901. Noise reduction plate; 902. Sound-absorbing plate; 903. Panel; 904. Noise reduction corrugation; 905. Sound-absorbing hole; 906. Slide; 10. Base; 11. Support foot; 12. Box door; 13. Threaded hole; 14. Sound guide hole; 15. Laboratory table; 16. Fixing bolts. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 The utility model provides a technical solution: a noise reduction test bench, including a box body 1, a shock absorbing plate 2 is provided on the top of the box body 1, and a plurality of symmetrically arranged fixing members 3 are fixedly installed on both sides of the top of the shock absorbing plate 2, a fixing plate 4 is fixedly connected to one side of the outer wall of the fixing member 3, and a noise reduction box 5 is fixedly connected to one end of the fixing plate 4. There are two noise reduction boxes 5, and the two noise reduction boxes 5 are respectively located on both sides of the top of the shock absorbing plate 2, a threaded seat 6 is provided on the top of the fixing member 3, and a shock absorbing component 7 is screwed and assembled in the threaded seat 6, and a sliding seat 8 is fixedly installed on the side walls at both ends of the box body 1, and a noise reduction component 9 is slidably arranged on the surface of the sliding seat 8.

[0029] In this embodiment, the noise reduction component 9 includes a noise reduction plate 901, a sound absorbing plate 902 and a panel 903. The sound absorbing plate 902 is located between the noise reduction plate 901 and the panel 903. The contact surfaces of the noise reduction plate 901, the sound absorbing plate 902 and the panel 903 are fixedly bonded, and the panel 903 is the outermost structure. The surface of the noise reduction plate 901 is provided with a plurality of noise reduction corrugations 904. The surface of the sound absorbing plate 902 is provided with a plurality of sound absorbing holes 905 arranged at equal intervals. The two side walls of the noise reduction plate 901, the sound absorbing plate 902 and the panel 903 are provided with slide grooves 906 that match the slide seat 8. The noise reduction component 9 is arranged in a The sliding seat 8 is slidably connected; through the setting of the noise reduction component 9, the noise generated by the experimental machine in the box body 1 can be absorbed, so as to achieve the purpose of noise reduction. After the noise passes through the noise reduction corrugation 904 on the surface of the noise reduction plate 901, the sudden change of the cross-sectional area is used to attenuate the noise, so that the potential energy of the noise is small after passing through the sound absorbing plate 902, and the noise is absorbed after passing through a plurality of sound absorbing holes 905 on the surface of the sound absorbing plate 902. The remaining noise after passing through the sound absorbing holes 905 is reflected back by the panel 903 and subjected to noise reduction treatment again, which greatly reduces the propagation of noise and enables the staff to better carry out experimental work.

[0030] In this embodiment, the shock absorbing assembly 7 includes a shock absorbing rod 701, a fixed sleeve 702 is movably sleeved on the outer wall of the shock absorbing rod 701, and mounting threads 703 are provided on the outer walls of both ends of the shock absorbing rod 701. The bottom end of the shock absorbing rod 701 is threadedly connected to the base 10 through the mounting threads 703. The base 10 is arranged at the bottom of the box body 1, and a plurality of supporting feet 11 are fixedly installed at the bottom of the base 10. The top end of the shock absorbing rod 701 is threadedly installed on the shock absorbing plate 2 through a threaded seat 6. A threaded hole 13 matching the mounting threads 703 is provided in the threaded seat 6. The top end of the shock absorbing rod 701 is screwed into the threaded hole 13 and extends upward. Through the setting of the shock absorbing assembly 7, the shock absorbing rod 701 is freely extended and retracted in the fixed sleeve 702, so as to reduce the frequency of vibration with the box body during noise propagation, thereby improving the working stability of the experimental table 15.

[0031] In this embodiment, a test bench 15 is provided above the shock absorbing plate 2, and the top of the test bench 15 is threadedly connected to the mounting thread 703 at the top of the shock absorbing rod 701 by a plurality of fixing bolts 16. Three sound guide holes 14 are provided on the surface of the shock absorbing plate 2, two of which are respectively located at the bottom center of the noise reduction box 5. A plurality of box doors 12 are hingedly assembled on the front side wall of the box body 1 by hinges, and handles are fixedly installed on the box doors 12. By adding a shock absorbing plate 2 below the test bench 15, the noise generated by the machine in the box can be effectively introduced into the noise reduction box 5 through the sound guide holes 14 for noise reduction treatment. Since the propagation path of the noise is reduced after passing through the sound guide holes 14 during the upward propagation process, the potential energy of the noise is weakened, and then diffused through the closed noise reduction box 5, so that the noise rebounds and offsets each other on the inner wall of the noise reduction box 5, thereby further improving the noise reduction effect.

[0032] Working principle and use process of the utility model: This noise reduction test bench can absorb the noise generated by the experimental machine in the box 1 through the setting of the noise reduction component 9, so as to achieve the purpose of noise reduction. It uses the sudden change of cross-sectional area after the noise passes through the noise reduction corrugation 904 on the surface of the noise reduction plate 901 to attenuate the noise, so that the potential energy of the noise is small after passing through the sound absorbing plate 902, and the noise is absorbed after passing through a plurality of sound absorbing holes 905 on the surface of the sound absorbing plate 902. The remaining noise after passing through the sound absorbing holes 905 is reflected back by the panel 903 and subjected to noise reduction treatment again, which greatly reduces the propagation of noise and enables the staff to conduct experiments better. work; and through the setting of the shock-absorbing component 7, the shock-absorbing rod 701 is used to freely expand and contract in the fixed sleeve 702, which can reduce the frequency of vibration with the box during noise propagation, thereby improving the working stability of the experimental table 15; at the same time, by adding a shock-absorbing plate 2 under the experimental table 15, the noise generated by the machine in the box can be effectively introduced into the noise reduction box 5 through the sound guide hole 14 for noise reduction treatment. Since the noise is transmitted upward, the propagation path is reduced after passing through the sound guide hole 14, the potential energy of the noise is weakened, and then diffused through the closed noise reduction box 5, so that the noise rebounds and cancels each other on the inner wall of the noise reduction box 5, thereby further improving the noise reduction effect. The use of this test bench can greatly reduce the generation of noise in the laboratory, which is conducive to the experimenters to better carry out experimental work, has good use effect, and is conducive to promotion and use.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise reduction test bench, comprising a box (1), characterized in that: A shock absorbing plate (2) is provided on the top of the box body (1), and a plurality of symmetrically arranged fixing members (3) are fixedly installed on both sides of the top of the shock absorbing plate (2); a fixing plate (4) is fixedly connected to one side of the outer wall of the fixing member (3); a noise reduction box (5) is fixedly connected to one end of the fixing plate (4); the number of the noise reduction boxes (5) is two, and the two noise reduction boxes (5) are respectively located on both sides of the top of the shock absorbing plate (2); a threaded seat (6) is provided on the top of the fixing member (3), and a shock absorbing component (7) is screwed inside the threaded seat (6); a sliding seat (8) is fixedly installed on the side walls at both ends of the box body (1), and a noise reduction component (9) is slidably arranged on the surface of the sliding seat (8).

2. A noise reduction test bench according to claim 1, characterized in that: The noise reduction component (9) comprises a noise reduction plate (901), a sound absorbing plate (902) and a panel (903); the sound absorbing plate (902) is located between the noise reduction plate (901) and the panel (903); contact surfaces of the noise reduction plate (901), the sound absorbing plate (902) and the panel (903) are fixedly bonded, and the panel (903) is the outermost structure.

3. A noise reduction test bench according to claim 2, characterized in that: The surface of the noise reduction plate (901) is provided with a plurality of noise reduction corrugations (904), and the surface of the sound absorption plate (902) is provided with a plurality of sound absorption holes (905) arranged at equal intervals.

4. A noise reduction test bench according to claim 2, characterized in that: The two side walls of the noise reduction plate (901), the sound absorbing plate (902) and the panel (903) are provided with sliding grooves (906) that match the sliding seat (8), and the noise reduction component (9) is slidably connected to the sliding seat (8) through the sliding grooves (906).

5. The noise reduction test bench according to claim 1, characterized in that: The shock absorbing assembly (7) comprises a shock absorbing rod (701), a fixing sleeve (702) being movably sleeved on the outer wall of the shock absorbing rod (701), and mounting threads (703) being provided on the outer walls at both ends of the shock absorbing rod (701).

6. A noise reduction test bench according to claim 5, characterized in that: The bottom end of the shock absorbing rod (701) is threadedly connected to the base (10) via a mounting thread (703); the base (10) is arranged at the bottom of the box body (1), and a plurality of supporting legs (11) are fixedly mounted at the bottom of the base (10).

7. A noise reduction test bench according to claim 6, characterized in that: The top end of the shock absorbing rod (701) is threadedly mounted on the shock absorbing plate (2) via a threaded seat (6); a threaded hole (13) matching the mounting thread (703) is provided in the threaded seat (6); the top end of the shock absorbing rod (701) is screwed into the threaded hole (13) and extends upward.

8. The noise reduction test bench according to claim 1, characterized in that: A test bench (15) is provided above the shock absorbing plate (2), and the top of the test bench (15) is threadedly connected to the mounting thread (703) at the top end of the shock absorbing rod (701) via a plurality of fixing bolts (16).

9. The noise reduction test bench according to claim 1, characterized in that: The surface of the shock-absorbing plate (2) is provided with three sound guide holes (14), wherein two of the sound guide holes (14) are respectively located at the bottom center position of the noise reduction box (5).

10. The noise reduction test bench according to claim 1, characterized in that: A plurality of box doors (12) are hingedly mounted on the front side wall of the box body (1) via hinges, and handles are fixedly mounted on the box doors (12).

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