A noise reduction device

Abstract

The utility model discloses a kind of noise reduction devices, belong to noise reduction technical field, a kind of noise reduction device, including box, hinged in the box top lid and installed in the box inside platform, the inner wall of the box and the lower surface of the box cover are all installed with passive noise reduction component, the passive noise reduction component is combined by perforated sound-absorbing panel, sound insulation cotton, through-hole plate and lug, the perforated sound-absorbing panel is respectively compounded in the inner wall of box and the lower surface of box cover, the sound insulation cotton is connected with the perforated sound-absorbing panel by bonding, the through-hole plate is compounded on the sound insulation cotton, the lug is arrayed distribution on the surface of the through-hole plate, feedforward microphone and feedback microphone are respectively installed on the platform, the outer wall of the box is installed with control host computer, it is combined by active noise reduction and passive noise reduction mode, can greatly improve the effect of noise reduction, reduce the damage of staff hearing system.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology, and more specifically, to a noise reduction device. Background Technology

[0002] A vibratory feeder is an auxiliary feeding device for automatic assembly or automatic processing machinery. It can arrange various products in an orderly manner and work with automatic assembly equipment to assemble the various parts of the products into a complete product, or work with automatic processing machinery to complete the processing of workpieces.

[0003] In screw production workshops, most processing equipment uses vibratory feeders for automated feeding. However, the noise generated by the vibratory feeders is too loud, which can cause hearing damage to workers who work near the vibratory feeders for extended periods. In order to effectively reduce the noise generated by the vibratory feeders during operation, we have proposed a noise reduction device to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a noise reduction device that can greatly improve the noise reduction effect and reduce the damage to the hearing system of workers by combining active noise reduction and passive noise reduction.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A noise reduction device includes a housing, a cover hinged to the top of the housing, and a platform installed inside the housing. Passive noise reduction components are installed on the inner wall of the housing and the lower surface of the cover.

[0009] The passive noise reduction component is composed of a perforated sound-absorbing panel, sound-insulating cotton, a perforated plate, and protrusions.

[0010] The perforated sound-absorbing panels are respectively bonded to the inner wall of the box and the lower surface of the box cover. The sound insulation cotton is bonded to the perforated sound-absorbing panels. The perforated plate is bonded to the sound insulation cotton. The protrusions are distributed in an array on the surface of the perforated plate.

[0011] A feedforward microphone and a feedback microphone are respectively installed on the platform, and a control host is installed on the outer wall of the enclosure;

[0012] The housing has a feeding window on its side wall away from the control host, and the feeding window passes through the passive noise reduction component.

[0013] Furthermore, the output terminal of the feedforward microphone is electrically connected to the input terminal of the control host, and the output terminal of the control host is electrically connected to the input terminal of the feedback microphone.

[0014] Furthermore, a first connecting shaft head is symmetrically fixedly connected to the side wall of the box cover, and a second connecting shaft head is installed on the outer wall of the box body corresponding to the first connecting shaft head.

[0015] Furthermore, an electric telescopic rod is installed between the first connecting shaft head and the second connecting shaft head, and the input end of the electric telescopic rod is electrically connected to the output end of the control host.

[0016] Furthermore, both ends of the electric telescopic rod are equipped with connecting ears, and the connecting ears are connected to the first connecting shaft head and the second connecting shaft head respectively through bearings.

[0017] Furthermore, a storage cabinet is installed at the bottom of the box.

[0018] Furthermore, the inner side of the storage cabinet is connected to a drawer via a guide rail, and the drawer is equipped with a handle.

[0019] 3. Beneficial effects

[0020] Compared with existing technologies, the advantages of this utility model are:

[0021] (1) In this solution, the vibratory feeder for screw production is installed on the platform located inside the box, and the feeding channel of the vibratory feeder passes through the feed window. The box cover is closed during the operation of the vibratory feeder. The noise generated by the vibratory feeder during operation is effectively reduced by the multiple reflections of the protrusions on the through-hole plate. At the same time, the sound insulation cotton has a multi-fiber structure. When the sound waves pass through the cotton, they are reflected, superimposed and collided by countless fibers. The sound wave energy is converted into heat energy and the sound wave intensity is weakened. The sound waves can be oscillated by the small chambers opened on the perforated sound absorption plate, which can further improve the noise reduction effect.

[0022] (2) In this scheme, the noise inside the box is captured by a feedforward microphone and transmitted to the control host. After the system calculation set in the control host, a sound wave signal (anti-phase sound wave) with the opposite phase to the captured noise is generated and broadcast through the feedback microphone. Since the two are opposite in phase, they cancel each other out after superposition, thereby reducing or completely eliminating the sound. The noise is dynamic and the active noise cancellation system needs to continuously detect, analyze and generate anti-phase signals to adapt to the changes in noise, thereby maintaining the noise reduction effect and having a very good active noise cancellation effect. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the passive noise reduction component structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the platform structure of this utility model;

[0026] Figure 4 This is an enlarged schematic diagram of part A of the present invention;

[0027] Figure 5 This is a structural schematic diagram from another perspective of the present invention.

[0028] Explanation of the labels in the diagram:

[0029] 1. Enclosure; 2. Enclosure lid; 3. Platform; 4. Perforated sound-absorbing panel; 5. Sound insulation cotton; 6. Perforated plate; 7. Protrusion; 8. Feedforward microphone; 9. Feedback microphone; 10. Control unit; 11. First connecting shaft; 12. Second connecting shaft; 13. Electric telescopic rod; 14. Connecting ear; 15. Feed window; 16. Storage cabinet; 17. Drawer Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Example:

[0032] Please see Figure 1-5 A noise reduction device includes a housing 1, a cover 2 hinged to the top of the housing 1, and a platform 3 installed inside the housing 1. Passive noise reduction components are installed on the inner wall of the housing 1 and the lower surface of the cover 2.

[0033] The passive noise reduction component is composed of a perforated sound-absorbing panel 4, sound insulation cotton 5, a perforated panel 6, and a protrusion 7.

[0034] Perforated sound-absorbing panels 4 are respectively bonded to the inner wall of the enclosure 1 and the lower surface of the enclosure cover 2. Sound insulation cotton 5 is bonded to the perforated sound-absorbing panels 4. Perforated panels 6 are bonded to the sound insulation cotton 5. Protrusions 7 are distributed in an array on the surface of perforated panels 6.

[0035] A feedforward microphone 8 and a feedback microphone 9 are respectively installed on the platform 3, and a control host 10 is installed on the outer wall of the housing 1.

[0036] A feed window 15 is provided on the side wall of the housing 1 away from the control host 10, and the feed window 15 passes through the passive noise reduction component;

[0037] It should be noted that when this noise reduction device is used, the vibratory feeder for screw production is installed on the platform 3 located inside the box 1, and the feeding channel of the vibratory feeder passes through the feed window 15. During the operation of the vibratory feeder, the box cover 2 is closed. The noise generated by the vibratory feeder during operation is reflected multiple times by the protrusions 7 on the perforated plate 6, which can effectively reduce the noise. At the same time, the sound insulation cotton 5 has a multi-fiber structure. When the sound waves pass through the cotton, they are reflected, superimposed, and collided by countless fibers, and the sound wave energy is converted into heat energy, which weakens the sound wave intensity. The small chambers opened on the perforated sound absorption plate 4 can make the sound waves oscillate, which can further improve the noise reduction effect.

[0038] The noise inside the enclosure 1 is captured by the feedforward microphone 8 and transmitted to the control host 10. After the system calculation set in the control host 10, a sound wave signal (anti-phase sound wave) with the opposite phase to the captured noise is generated and broadcast through the feedback microphone 9. Since the two are out of phase, they cancel each other out after superposition, thereby reducing or completely eliminating the sound. The noise is dynamic and changes. The active noise cancellation system needs to continuously detect, analyze and generate anti-phase signals to adapt to the changes in noise, thereby maintaining the noise reduction effect and having a very good active noise cancellation effect.

[0039] like Figure 1 , Figure 3 As shown, the output of the feedforward microphone 8 is electrically connected to the input of the control host 10, and the output of the control host 10 is electrically connected to the input of the feedback microphone 9.

[0040] It should be noted that the noise inside the enclosure 1 is captured by the feedforward microphone 8 and transmitted to the control host 10. After the system calculation set in the control host 10, a sound wave signal (anti-phase sound wave) with the opposite phase to the captured noise is generated and broadcast through the feedback microphone 9. Since the two are out of phase, they cancel each other out after being superimposed, thereby reducing or completely eliminating the sound.

[0041] like Figure 1 , Figure 4 As shown, the side wall of the box cover 2 is symmetrically fixedly connected with a first connecting shaft head 11, and the outer wall of the box body 1 is equipped with a second connecting shaft head 12 corresponding to the first connecting shaft head 11. An electric telescopic rod 13 is installed between the first connecting shaft head 11 and the second connecting shaft head 12, and the input end of the electric telescopic rod 13 is electrically connected to the output end of the control host 10. Both ends of the electric telescopic rod 13 are equipped with connecting ears 14, and the connecting ears 14 are connected to the first connecting shaft head 11 and the second connecting shaft head 12 respectively through bearings.

[0042] It should be noted that by using the control host 10 to control the extension and retraction of the movable end of the electric telescopic rod 13, the connecting ear 14 is made to rotate in conjunction with the first connecting shaft head 11 and the second connecting shaft head 12 respectively, thereby facilitating the opening and closing of the box cover 2, and thus facilitating the maintenance of the vibratory plate.

[0043] like Figure 5 As shown, a storage cabinet 16 is installed at the bottom of the box 1. A drawer 17 is slidably connected to the inside of the storage cabinet 16 via a guide rail, and a handle is installed on the drawer 17.

[0044] It should be noted that by placing maintenance tools in the drawer 17 located inside the storage cabinet 16, it is convenient for staff to perform maintenance work on the vibratory feeder.

[0045] In use: By installing the vibratory feeder for screw production on the platform 3 located inside the box 1, and letting the feeding channel of the vibratory feeder pass through the feed window 15, the box cover 2 is closed during the operation of the vibratory feeder. The noise generated by the vibratory feeder during operation is effectively reduced by the multiple reflections of the protrusions 7 on the perforated plate 6. At the same time, the sound insulation cotton 5 has a multi-fiber structure. When the sound waves pass through the cotton, they are reflected, superimposed, and collided by countless fibers, and the sound wave energy is converted into heat energy, and the sound wave intensity is weakened. The sound waves can be oscillated by the small chambers opened on the perforated sound absorption plate 4, which can further improve the noise reduction effect.

[0046] The noise inside the enclosure 1 is captured by the feedforward microphone 8 and transmitted to the control host 10. After the system calculation set in the control host 10, a sound wave signal (anti-phase sound wave) with the opposite phase to the captured noise is generated and broadcast through the feedback microphone 9. Since the two are out of phase, they cancel each other out after superposition, thereby reducing or completely eliminating the sound. The noise is dynamic and changes. The active noise cancellation system needs to continuously detect, analyze and generate anti-phase signals to adapt to the changes in noise, thereby maintaining the noise reduction effect and having a very good active noise cancellation effect.

[0047] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A noise reduction device, comprising a housing (1), a housing cover (2) hinged to the top of the housing (1), and a platform (3) mounted inside the housing (1), characterized in that: Passive noise reduction components are installed on the inner wall of the box (1) and the lower surface of the box cover (2); The passive noise reduction component is composed of a perforated sound-absorbing panel (4), sound insulation cotton (5), a perforated plate (6), and a protrusion (7); The perforated sound-absorbing panel (4) is respectively bonded to the inner wall of the box (1) and the lower surface of the box cover (2). The sound insulation cotton (5) is bonded to the perforated sound-absorbing panel (4). The perforated plate (6) is bonded to the sound insulation cotton (5). The protrusions (7) are distributed in an array on the surface of the perforated plate (6). A feedforward microphone (8) and a feedback microphone (9) are respectively installed on the platform (3), and a control host (10) is installed on the outer wall of the housing (1). The housing (1) has a feeding window (15) on its side wall away from the control host (10), and the feeding window (15) passes through the passive noise reduction component.

2. The noise reduction device according to claim 1, characterized in that: The output of the feedforward microphone (8) is electrically connected to the input of the control host (10), and the output of the control host (10) is electrically connected to the input of the feedback microphone (9).

3. The noise reduction device according to claim 1, characterized in that: The side wall of the box cover (2) is symmetrically fixedly connected with a first connecting shaft head (11), and the outer wall of the box body (1) is equipped with a second connecting shaft head (12) corresponding to the first connecting shaft head (11).

4. The noise reduction device according to claim 3, characterized in that: An electric telescopic rod (13) is installed between the first connecting shaft head (11) and the second connecting shaft head (12), and the input end of the electric telescopic rod (13) is electrically connected to the output end of the control host (10).

5. A noise reduction device according to claim 4, characterized in that: Both ends of the electric telescopic rod (13) are equipped with connecting ears (14), and the connecting ears (14) are connected to the first connecting shaft head (11) and the second connecting shaft head (12) respectively through bearings.

6. The noise reduction device according to claim 1, characterized in that: A storage cabinet (16) is installed at the bottom of the box (1).

7. A noise reduction device according to claim 6, characterized in that: The inner side of the storage cabinet (16) is connected to a drawer (17) via a guide rail, and the drawer (17) is equipped with a handle.

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