Novel noise elimination protection device suitable for angle grinder

Abstract

The invention discloses a novel noise elimination protection device suitable for an angle grinder. The novel noise elimination protection device comprises an inner enclosure wall, a wave spring plate, an outer enclosure wall and a bottom plate. The inner enclosure bulkhead comprises a bottom panel and an annular plate mounted in the peripheral direction of the periphery of the bottom panel; the wave spring plate is of an annular structure, the inner side of the wave spring plate is fixedly connected with the inner enclosure wall, and the outer side of the wave spring plate is fixedly connected with the outer enclosure wall. The peripheral wall comprises an annular bottom plate and a plurality of layers of annular side plates vertically mounted on the bottom plate, a resonance silencing area is formed between every two adjacent side plates, a plurality of partition plates are arranged in each layer of resonance silencing area, and a plurality of open holes are formed in the side plates; the bottom plate is connected with the baffle of the inner enclosure wall and the outermost side plate of the outer enclosure wall, the bottom plate, the baffle of the inner enclosure wall, the wave spring plate and the innermost side plate of the outer enclosure wall form a cavity, and the cavity is filled with sound absorption and insulation materials; the safety and practicability are greatly improved, and the protection effect is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinders, in particular to a novel noise reduction and protection device suitable for angle grinders. Background Art

[0002] With the rapid development of shipbuilding technology, ship-related specifications are constantly updated, and the requirements for shipbuilding are becoming increasingly refined and technological. During the shipbuilding process, the construction, assembly, and closure of the hull sections require continuous welding and grinding of the steel plate structure to ultimately form a complete hull structure.

[0003] During the construction process, due to process requirements, the welds need to be ground and polished to meet production needs. During the grinding process, the friction between the high-speed rotating grinding wheel and the weld will produce extremely obvious flying sparks and accompanied by harsh noise, which not only creates a huge safety hazard but also causes noise pollution.

[0004] Angle grinders are the most commonly used grinding and polishing devices for weld seams during shipbuilding. Powered by an electric motor or compressed air, they are equipped with a high-speed rotating grinding disc, which grinds and cuts metal components. Angle grinders typically have an adjustable metal shield to prevent the grinding disc from breaking and causing injury. With the continuous advancement of technology, equipment is moving towards higher efficiency, lighter weight, and more intelligent features. This has also put new demands on the design, manufacture, installation, and use of angle grinders, as well as their safety, environmental protection, and applicability. Summary of the Invention

[0005] The purpose of the present invention is to overcome the technical problems and defects of the above-mentioned prior art, to enhance the applicability of the angle grinder and improve its comprehensive performance. The present invention provides a new noise reduction and protection device suitable for the angle grinder.

[0006] The present application proposes a novel noise reduction and protection device suitable for an angle grinder, wherein the noise reduction and protection device comprises an inner surrounding wall, a wave spring plate, an outer peripheral wall, and a bottom plate;

[0007] The inner surrounding wall includes a bottom panel and an annular plate installed along the circumferential direction of the outer periphery of the bottom panel, and a plurality of L-shaped baffles are installed along the circumferential direction on the surface of the bottom panel;

[0008] The wave spring plate is a circular ring structure, the inner side of which is fixedly connected to the inner surrounding wall, and the outer side of which is fixedly connected to the outer surrounding wall;

[0009] The outer wall includes a circular bottom plate and a plurality of annular side plates vertically mounted on the bottom plate, wherein a resonance silencing area is formed between adjacent side plates, and a plurality of partition plates are provided in each resonance silencing area, and a plurality of openings are provided on the side plates, so that different areas of the same resonance silencing area are connected in parallel to form a plurality of resonance cavities, and the resonance silencing areas of different layers are connected in series from the inside out to form a multi-layer resonance cavity with increasing volume;

[0010] The bottom plate is connected to the baffle of the inner wall and the outermost side plate of the outer wall. The bottom plate, the baffle of the inner wall, the wave spring plate and the innermost side plate of the outer wall form a cavity filled with sound absorbing and insulating material.

[0011] The wave spring plate is elastic along the radial and vertical directions.

[0012] It also includes a transparent cover plate, which is installed on the inner side of the bottom panel of the inner wall. The transparent cover plate is a transparent circular plate with a through hole, and the through hole allows the rotating shaft of the angle grinder to pass through.

[0013] The annular plate of the inner surrounding wall is an annular plate with a certain perforation rate.

[0014] The bottom plate is a double-layer circular pad, the upper layer is made of rubber material, the lower layer is made of metal material, and the two layers are connected by gluing.

[0015] The bottom plate covers and is fixed to the baffle plate and the outer wall surface of the inner wall, so that the inner side of the bottom plate is fixedly connected to the baffle plate of the inner wall, and the bottom plate is fixedly connected to the side plate of the outer wall, so that the resonant sound-absorbing area forms a closed structure.

[0016] The advantages and positive effects of the present invention are:

[0017] (1) The present invention can effectively intercept high-speed flying high-temperature waste by installing an L-shaped baffle on the inner wall. The baffle buffers the flying debris and reduces its temperature before it falls to the outside, which can effectively avoid burns, fire and other accidents.

[0018] (2) The annular plate of the inner wall of the present invention is an annular thin plate with a certain perforation rate. The thin plate is evenly and regularly provided with through holes. The sound-absorbing material filled between the plate and the corrugated spring plate forms a sound insulation layer, which can effectively reduce the transmission of noise to the outside during the grinding process;

[0019] (3) The outer wall of the present invention is divided into several layers along the radial direction and multiple regions along the circumferential direction. The number of divided regions in each layer is equal and staggered, and each region of each layer has holes, so that different regions in the same layer are connected in parallel to form multiple resonance cavities of equal size. Different layers are connected in series from the inside to the outside to form a three-layer resonance cavity with increasing volume, which has a good sound-absorbing effect in a wide frequency band.

[0020] (4) The present invention forms a sound-absorbing layer and a resonance sound-absorbing cavity through the design of the structure of multiple protective devices and the rational use of materials. The combination of the two can achieve a good sound-absorbing effect in a wider frequency band, effectively preventing the spread of noise generated during the grinding process;

[0021] (5) The present invention can significantly improve the protective effect by installing a protective device. Compared with the current protective cover, the new protective device can protect the grinding disc in all directions, avoid the splashing of high-temperature and high-speed waste chips generated by grinding, and avoid harm to people caused by the breakage of the grinding disc, which greatly improves safety and practicality, and significantly improves the protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0023] Figure 1 A top view of a novel noise reduction and protection device for an angle grinder provided in an embodiment of the present invention;

[0024] FIG2( a ) is a schematic structural diagram of an inner wall of a novel noise reduction protection device for an angle grinder provided by an embodiment of the present invention;

[0025] FIG2( b ) is a side view of the inner wall of a novel noise reduction protection device for an angle grinder provided by an embodiment of the present invention;

[0026] Figure 3 A schematic structural diagram of a wave spring plate of a novel noise reduction protection device for an angle grinder provided in an embodiment of the present invention;

[0027] Figure 4 A schematic structural diagram of the outer wall of a novel noise reduction protection device for an angle grinder provided in an embodiment of the present invention;

[0028] Figure 5 A top view of the outer wall of a novel noise reduction protection device for an angle grinder provided in an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a novel noise reduction and protection device suitable for an angle grinder provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] This embodiment provides a novel noise reduction and protection device suitable for an angle grinder, the noise reduction and protection device comprising an inner wall 2, a wave spring plate 3, an outer wall 4, and a bottom plate 5;

[0034] The inner wall 2 includes a bottom panel and an annular plate installed along the circumferential direction of the outer periphery of the bottom panel, and a plurality of L-shaped baffles 2-1 are installed along the circumferential direction on the surface of the bottom panel;

[0035] The wave spring plate 3 is a circular ring structure, the inner side of which is fixedly connected to the inner wall 2, and the outer side of which is fixedly connected to the outer wall 4. The wave spring plate 3 is elastic along the radius and vertical direction;

[0036] The outer wall 4 includes a circular bottom plate and several layers of annular side plates vertically installed on the bottom plate, and a resonance sound-absorbing area 401 is formed between adjacent side plates. A plurality of partition plates 402 are arranged in each layer of the resonance sound-absorbing area, and a plurality of openings 403 are arranged on the side plates, so that different areas of the resonance sound-absorbing area of ​​the same layer are connected in parallel to form multiple resonance cavities, and the resonance sound-absorbing areas of different layers are connected in series from the inside to the outside to form a multi-layer resonance cavity with increasing volume; of course, in order to achieve a better resonance sound-absorbing effect, it can be considered that the number of areas divided into by multiple partition plates in each layer of the resonance sound-absorbing area is equal and staggered, and each area of ​​each layer has an opening, so that different areas between the same layers are connected in parallel to form multiple resonance cavities of equal size.

[0037] The bottom plate 5 is connected to the baffle of the inner wall 2 and the outermost side plate of the outer wall 4. The bottom plate, the baffle of the inner wall 2, the wave spring plate 3, and the innermost side plate of the outer wall 4 form a cavity filled with sound absorbing and insulating material.

[0038] It also includes a transparent cover plate 1, which is installed on the inner side of the bottom panel of the inner wall 2. The transparent cover plate 1 is a transparent circular plate with a through hole, and the through hole allows the rotating shaft of the angle grinder to pass through.

[0039] The baffle of the inner surrounding wall 2 is an annular thin plate 2-2 with a certain perforation rate.

[0040] The bottom plate 5 is a double-layered circular gasket, the upper layer is made of rubber and the lower layer is made of metal, and the two layers are connected by gluing; the bottom plate 5 covers and is fixed to the baffle of the inner wall 2 and the surface of the outer wall 4, so that the inner side of the bottom plate 5 is fixedly connected to the baffle of the inner wall 2, and the bottom plate 5 is fixedly connected to the side plate of the outer wall 4, so that the resonant sound-absorbing area forms a closed structure.

[0041] Specifically, such as Figure 1 As shown, the transparent cover plate 1 is a transparent circular plate with a through hole of radius r at the center. The material is PC board with high light transmittance and impact resistance. The through hole can pass through the rotating shaft. The transparent cover plate 1 is connected to the inner concave platform of the top panel of the inner wall 2 by gluing. The grinding status of the grinding disc and the wall surface can be directly seen through the transparent cover plate 1. The radius of the transparent cover plate 1 is 1.2-1.5 times the radius of the grinding disc.

[0042] like Figure 2a As shown in 2b, the inner wall 2 is a concave cavity structure made of steel. There is a concave platform on the inner side of the bottom panel of the inner wall 2 for placing the transparent cover 1, and a concave platform on the outside for connecting the wave spring plate 3, and an L-shaped baffle 2-1 is welded along the circumferential direction. The baffle can effectively intercept the high-temperature splashes generated by grinding. After the baffle is buffered and intercepted, the splashes are cooled and then fall to the outside, which can effectively avoid burns, fire and other safety accidents; and can intercept high-speed flying objects generated when the grinding disc is broken, thereby improving the guarantee of safe operation; the outer wall surface of the inner wall 2 is an annular plate 2-2 with a certain perforation rate, and the annular plate is evenly and regularly provided with through holes. A sound insulation layer is formed by filling the sound-absorbing material between the wave spring plate 3 and the inner plate of the outer wall 4, which can effectively reduce the transmission of noise to the outside during grinding, and the effective frequency band and bandwidth of the sound absorption can be adjusted by adjusting the opening rate and the size of the openings;

[0043] like Figure 3 As shown, the wave spring plate 3 is composed of two inner and outer annular thin plates and an annular spring plate. The thin plates are made of steel, and the annular spring plate is made of spring steel. The three are connected into a whole by welding. It has good elasticity along the radius and vertical direction, which can meet the requirement of close fit between the protective device and the polishing wall surface due to the change in the angle between the machine shaft and the polishing wall surface. The inner annular thin plate is connected to the outer concave platform of the top panel of the inner surrounding wall 2, and the outer annular thin plate is connected to the inner ring of the outer wall 4. The cavity formed by it, the inner surrounding wall 2, and the outer wall 4 is filled with rock wool to form a sound-absorbing and insulating layer, which can effectively reduce the transmission of noise generated during the polishing process to the outside world.

[0044] like Figure 4 、 5 As shown, the outer wall 4 is a resonance muffler, which is made of stainless steel and is divided into three layers along the radial direction and multiple areas along the circumferential direction. The number of divided areas in each layer is equal and staggered, and the inner wall surface near the center of each area of ​​each layer is opened, so that different areas within the same layer are connected in parallel to form multiple resonance cavities of equal size. Different layers are connected in series from the inside to the outside to form three layers of resonance cavities with increasing volume. By adjusting the number and size of the cavities, a good muffler effect can be achieved in a wide frequency band.

[0045] The bottom plate 5 is a double-layered annular pad, which is divided into two layers from top to bottom, the upper layer is made of rubber and the lower layer is made of metal, and the two are connected by gluing; the bottom plate and the baffle of the inner wall 2, the corrugated spring plate 3, and the innermost side plate of the outer wall 4 form a cavity, and the cavity is filled with sound-absorbing and insulating materials to achieve a good sound absorption effect; the design of the double-layer material can achieve the purpose of convenient disassembly and sealing the cavity to avoid sound leakage, and has wear resistance and service life.

[0046] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A new type of noise reduction protection device suitable for angle grinders, characterized in that: The noise reduction protection device comprises an inner wall (2), a wave spring plate (3), an outer wall (4), and a bottom plate (5); The inner surrounding wall (2) comprises a bottom panel and an annular plate installed along the outer circumferential direction of the bottom panel, and a plurality of L-shaped baffles (2-1) are installed along the circumferential direction on the surface of the bottom panel; The wave spring plate (3) is a circular ring structure, the inner side of which is fixedly connected to the inner surrounding wall (2), and the outer side of which is fixedly connected to the outer surrounding wall (4); The peripheral wall (4) includes a circular bottom plate and a plurality of annular side plates vertically mounted on the bottom plate, a resonance silencing area is formed between adjacent side plates, a plurality of partition plates are arranged in each resonance silencing area, and a plurality of openings are arranged on the side plates, so that different areas of the same resonance silencing area are connected in parallel to form a plurality of resonance cavities, and the resonance silencing areas of different layers are connected in series from the inside out to form a multi-layer resonance cavity with increasing volume; The bottom plate (5) is connected to the baffle of the inner surrounding wall (2) and the outermost side plate of the outer wall (4); the bottom plate, the baffle of the inner surrounding wall (2), the wave spring plate (3), and the innermost side plate of the outer wall (4) form a cavity, and the cavity is filled with sound absorbing and insulating material.

2. The novel noise reduction and protection device for angle grinders according to claim 1 is characterized in that: The wave spring plate (3) is elastic along the radius and vertical directions.

3. The novel noise reduction and protection device for angle grinders according to claim 1 is characterized in that: It also includes a transparent cover plate (1), which is installed on the inner side of the bottom panel of the inner wall (2), and the transparent cover plate (1) is a transparent circular plate with a through hole, and the through hole allows the rotating shaft of the angle grinder to pass through.

4. The novel noise reduction and protection device for angle grinders according to claim 1 is characterized in that: The annular plate of the inner surrounding wall (2) is an annular plate (2-2) with a certain perforation rate.

5. The novel noise reduction and protection device for angle grinders according to claim 1 is characterized in that: The bottom plate (5) is a double-layer circular ring pad, the upper layer is made of rubber material, and the lower layer is made of metal material, and the two layers are connected by gluing.

6. The novel noise reduction and protection device for angle grinders according to claim 1 is characterized in that: The bottom plate (5) covers and is fixed to the baffle plate and the surface of the outer wall (4) of the inner surrounding wall (2), so that the inner side of the bottom plate (5) is fixedly connected to the baffle plate of the inner surrounding wall (2), and the bottom plate (5) is fixedly connected to the side plate of the outer wall (4), so that the resonant sound-absorbing area forms a closed structure.

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