Inertia exciter for active noise reduction, noise reduction system and power equipment

Abstract

The utility model relates to the technical field of inertia exciters, in particular to an inertia exciter for active noise reduction, a noise reduction system and power equipment. A voice coil motor is vertically arranged in the shell, the output end of the voice coil motor is connected with a spring mechanism, and the bottom of the spring mechanism is connected with a balancing weight; the spring mechanism comprises a first spring piece and a second spring piece; the first spring piece and the second spring piece are oppositely arranged in parallel, a first bottom plate is arranged in the middle of the middle, first base plates are arranged at the two ends, a second bottom plate is arranged in the middle of the top face of the first spring piece, and second base plates are arranged on the two sides of the bottom face of the second spring piece. The scheme is used for generating vibration, active noise reduction is carried out, the service life is prolonged, and the application range is widened.

Description

Technical Field

[0001] This utility model relates to the field of inertial exciter technology, specifically to an inertial exciter, noise reduction system, and power equipment for active noise reduction. Background Technology

[0002] An inertial exciter is a device used to generate vibrations and is widely used in vibration testing, structural dynamics research, and material fatigue testing. It generates vibrations through an internal eccentric mass or electromagnetic drive mechanism, simulating various vibration environments to test the reliability and durability of products.

[0003] The basic working principle of an inertial exciter is as follows: 1. Eccentric Mass: The most common inertial exciter uses one or more eccentric mass blocks. When a motor drives the eccentric mass block to rotate, centrifugal force is generated, causing vibration. By adjusting the motor speed, the frequency and amplitude of the vibration can be changed. 2. Electromagnetic Drive: Another common driving method is electromagnetic drive. An electromagnetic exciter uses the magnetic field generated by an electromagnetic coil to drive a movable iron core, thereby producing vibration. This method allows for more precise control and a wider frequency range.

[0004] In the existing technology, the rebound of the eccentric block relies solely on the setting of a spring. If the spring is damaged, it will affect the return of the eccentric block to its original position. Furthermore, the spring is more prone to damage in some harsh environmental conditions, such as power equipment, which operates in relatively high-temperature environments or directly outdoors.

[0005] Therefore, there is an urgent need for an inertial exciter, noise reduction system, and power equipment for active noise reduction that can generate vibration, perform active noise reduction, extend service life, and expand the scope of application. Utility Model Content

[0006] One of the objectives of this invention is to provide an inertial exciter for active noise reduction, which generates vibration to actively reduce noise, extends service life, and expands the scope of application.

[0007] The basic solution provided by this utility model is: an inertial exciter for active noise reduction, comprising: a housing;

[0008] A voice coil motor is installed inside the housing. The voice coil motor is vertically positioned and its output end is connected to a spring mechanism. A counterweight is connected to the bottom of the spring mechanism.

[0009] The spring mechanism includes: a first spring plate and a second spring plate; the first spring plate and the second spring plate are arranged in parallel and opposite to each other, with a first base plate in the middle and first pads at both ends, a second base plate in the middle of the top surface of the first spring plate, and second pads on both sides of the bottom surface of the second spring plate.

[0010] Furthermore, the housing includes: a positioning frame and an end cap; the open ends of the positioning frame and the end cap are opposite to and in contact with each other, and are connected by bolts.

[0011] Furthermore, a first groove is provided on both sides of the opening end of the shell, and a first pad and a second pad are located in the first groove.

[0012] Furthermore, through holes are provided at both ends of the first and second spring plates, the first pad, and the second pad, and mounting holes are provided on the bottom surface of the first groove. The mounting bolts are fixedly connected by passing through the through holes and mounting holes.

[0013] Furthermore, the bottom surface of the second spring plate is connected to the counterweight, which is located in the end cap;

[0014] The output end of the voice coil motor contacts the top surface of the second base plate.

[0015] Furthermore, a sensor is also installed inside the housing for measuring acceleration.

[0016] Beneficial effects: In this design, the voice coil motor output drives the counterweight to move towards the bottom of the housing. The spring mechanism in the middle can increase the vibration effect and drive the counterweight to reset. The spring mechanism is equipped with two parallel spring plates, specifically the first spring plate and the second spring plate are arranged parallel to each other. A first base plate is set in the middle of the middle and a first pad plate is set at both ends. A second base plate is set in the middle of the top surface of the first spring plate and a second pad plate is set on both sides of the bottom surface of the second spring plate. If one spring plate fails, the other spring plate will continue to provide elasticity to ensure the reset of the counterweight, thereby improving the service life of the inertial exciter. Even in harsh environmental conditions, it can be used for a longer period of time and is more suitable for use in power equipment.

[0017] In addition, the overall structure is simple to connect, and the internal components can be disassembled and replaced, which further improves the service life of the inertial exciter.

[0018] The second objective of this utility model is to provide a noise reduction system that can perform active noise reduction, extend service life, and expand the scope of application.

[0019] This utility model provides a second basic solution: a noise reduction system that uses the aforementioned inertial exciter for active noise reduction.

[0020] Beneficial effects: The noise reduction system, which incorporates an inertial exciter for active noise reduction, enables active noise cancellation and has a long service life, making it widely applicable. The noise reduction system effectively reduces low-frequency noise from power equipment without affecting the maintenance, repair, ventilation, or heat dissipation of existing equipment. The retrofit is quick and cost-effective. A third objective of this invention is to provide a power equipment capable of active noise reduction, extending its service life and expanding its applicability.

[0021] This utility model provides a third basic solution: a power equipment that uses the above-mentioned inertial exciter for active noise reduction.

[0022] Beneficial effects: Power equipment equipped with inertial exciters for active noise reduction can achieve active noise reduction, and the inertial exciters have a long service life and wide applicability. The noise reduction system can effectively reduce the low-frequency noise of power equipment without affecting the maintenance, ventilation, and heat dissipation of existing power equipment. The retrofit is quick and cost-effective. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of an inertial exciter for active noise reduction according to the present invention;

[0024] Figure 2 This is a schematic diagram of the frameless structure of an inertial exciter for active noise reduction according to this utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the frameless structure of an inertial exciter for active noise reduction according to this utility model. Figure 2 ;

[0026] Figure 4 This is a structural cross-sectional view of an embodiment of an inertial exciter for active noise reduction according to this utility model. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The reference numerals in the accompanying drawings include: housing 1, voice coil motor 2, spring mechanism 3, counterweight 4, sensor 5, positioning frame 101, end cap 102, first spring plate 301, second spring plate 302, first base plate 303, first pad 304, second base plate 305, and second pad 306.

[0029] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In the description of this specification, it should be understood that the directional terms such as "upper," "lower," "left," and "right" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that one element is connected to another element "upper," "lower," "left," or "right," it can be directly connected to the other element "upper," "lower," "left," or "right," or indirectly connected to the other element "upper," "lower," "left," or "right" through an intermediate element.

[0031] The basic implementation examples are as follows: Figure 1 As shown: An inertial exciter for active noise cancellation includes: a housing 1;

[0032] A voice coil motor 2 is installed inside the housing 1. The voice coil motor 2 is vertically arranged and its output end is connected to a spring mechanism 3. A counterweight block 4 is connected to the bottom of the spring mechanism 3.

[0033] The housing 1 includes a positioning frame 101 and an end cap 102. The open ends of the positioning frame 101 and the end cap 102 are opposite to each other and in contact, and are connected by bolts. Specifically, the end cap 102 is a hat-shaped end cap 102, with a plurality of first through holes spaced apart on the brim. The bottom surface of the open end of the positioning frame 101 is provided with a plurality of first mounting holes corresponding to the first through holes. Bolts are provided to pass through the first through holes and into the first mounting holes to fix the positioning frame 101 and the end cap 102 together. The voice coil motor 2 and the spring mechanism 3 are located in the positioning frame 101.

[0034] The voice coil motor 2 is fixedly connected to the top of the positioning frame 101. In this embodiment, the fixed connection is achieved by setting through holes and mounting bolts. In this embodiment, the voice coil motor 2 is HYYQ70-15-00A.

[0035] The spring mechanism 3 includes: a first spring plate 301 and a second spring plate 302; the first spring plate 301 and the second spring plate 302 are arranged in parallel and opposite to each other, and a first base plate 303 is provided in the middle, and a first pad plate 304 is provided at both ends; a second base plate 305 is provided in the middle of the top surface of the first spring plate 301, and a second pad plate 306 is provided on both sides of the bottom surface of the second spring plate 302.

[0036] The shell 1 has a first groove on both sides of the opening end. The first pad 304 and the second pad 306 are located in the first groove. In this embodiment, the first spring sheet 301 and the second spring sheet 302 are provided with through holes at both ends, the first pad 304 and the second pad 306 are provided with mounting holes, and the bottom surface of the first groove is provided with mounting holes. The mounting bolts pass through the through holes and the mounting holes for fixed connection.

[0037] In this embodiment, the first pad 304 and the second pad 306 are semi-circular pads;

[0038] The bottom surface of the second spring sheet 302 is connected to the counterweight 4, which is located in the end cap 102. In this embodiment, the counterweight 4, the second spring sheet 302, and the first base plate 303 are fixedly connected by through-hole mounting bolts.

[0039] The output end of the voice coil motor 2 is in contact with the top surface of the second base plate 305;

[0040] A sensor 5 is also installed inside the housing 1 for measuring acceleration. Specifically, the sensor 5 is located on one side of the voice coil motor 2, and a detection through hole is provided on the top of the housing 1. The sensing end of the sensor 5 measures the acceleration of an external device through the detection through hole, such as a power device. The external device is a device that is equipped with an inertial exciter for active noise reduction. In this embodiment, the sensor is an acceleration sensor, such as PCB356B18.

[0041] This embodiment also provides a noise reduction system that uses the aforementioned inertial exciter for active noise reduction.

[0042] This embodiment also provides a power device that uses the aforementioned inertial exciter for active noise reduction.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An inertial exciter for active noise reduction, characterized in that, include: case; A voice coil motor is installed inside the housing. The voice coil motor is vertically positioned and its output end is connected to a spring mechanism. A counterweight is connected to the bottom of the spring mechanism. The spring mechanism includes: a first spring plate and a second spring plate; the first spring plate and the second spring plate are arranged in parallel and opposite to each other, with a first base plate in the middle and first pads at both ends, a second base plate in the middle of the top surface of the first spring plate, and second pads on both sides of the bottom surface of the second spring plate.

2. The inertial exciter for active noise reduction according to claim 1, characterized in that, The housing includes a positioning frame and an end cap; the open ends of the positioning frame and the end cap are opposite to each other and in contact, and are connected by bolts.

3. The inertial exciter for active noise reduction according to claim 1, characterized in that, A first groove is provided on both sides of the opening end of the shell, and a first pad and a second pad are located in the first groove.

4. The inertial exciter for active noise reduction according to claim 3, characterized in that, Through holes are provided at both ends of the first and second spring plates, the first pad, and the second pad. Mounting holes are provided on the bottom surface of the first groove. Mounting bolts are used to fix the connection through the through holes and mounting holes.

5. The inertial exciter for active noise reduction according to claim 1, characterized in that, The bottom surface of the second spring plate is connected to the counterweight, which is located in the end cap. The output end of the voice coil motor contacts the top surface of the second base plate.

6. The inertial exciter for active noise reduction according to claim 1, characterized in that, The housing also contains sensors for measuring acceleration.

7. A noise reduction system, characterized in that, The inertial exciter for active noise reduction as described in any one of claims 1-6 is employed.

8. An electrical device, characterized in that, The inertial exciter for active noise reduction as described in any one of claims 1-6 is employed.

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