Low-noise dust collector

Abstract

The utility model discloses a low-noise dust collector which comprises an outer shell and a motor shell installed in the outer shell. A noise reduction cavity with an inverted-L-shaped section is formed between the motor shell and the outer shell, the outer shell comprises an upper cover plate, a gland is installed at the center of the upper cover plate, and a ventilation cavity is formed between the gland and the upper cover plate. A first vent hole communicated with the noise reduction cavity is formed in the side wall of the lower end of the motor shell, a second vent hole communicated with the noise reduction cavity is formed in the upper cover plate, and a gap for airflow to flow out is formed between the outer edge of the gland and the upper cover plate. The noise reduction cavity and the ventilation cavity are filled with the sound absorption materials, comprehensive noise reduction treatment is conducted on noise, the noise reduction device can be applied to small equipment, the structure is simple, space is saved, the manufacturing cost is low, the noise generated by the motor is subjected to multiple times of noise reduction treatment, and the effect of greatly reducing the noise under the condition that the power of the motor is not affected can be achieved; and better use experience is provided for the equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of motor accessories, specifically to a low noise dust collector. BACKGROUND

[0002] The motor of the dust collector usually generates a large noise when working, and the existing dust collector structure is mostly provided with a motor installed in a motor shell, and effective noise reduction processing thereof is usually achieved in two ways, one of which is to change the structure of the motor to reduce noise output without changing the working efficiency, but this way is high in cost and not practical; the other is to use a multi-layer motor isolation cover to isolate noise, and add sound-absorbing cotton in the middle of the isolation cover to isolate noise transmission, but this structure is high in cost and complex in manufacturing process, and is unreasonable in space layout when applied to small devices, which makes the device too heavy, and the motor cover closest to the motor is a single-layer wall structure, which cannot meet the requirement of sound absorption. SUMMARY

[0003] In view of the problems of high cost, complex manufacturing process and unreasonable space layout in the prior art, the utility model provides a low noise dust collector, which comprises a shell and a motor shell installed in the shell; a noise reduction cavity with a reverse L-shaped cross section is formed between the motor shell and the shell, the shell comprises an upper cover plate, a gland is installed at the center of the upper cover plate, and an air passage cavity is formed between the gland and the upper cover plate.

[0004] A first air hole for communicating with the noise reduction cavity is arranged on the lower end side wall of the motor shell, a second air hole for communicating with the noise reduction cavity is arranged on the upper cover plate, and a gap for air flow is formed between the outer edge of the gland and the upper cover plate.

[0005] Further, the upper side of the upper cover plate is a concave cavity.

[0006] Further, the noise reduction cavity is filled with sound-absorbing material.

[0007] Further, sound-absorbing material is arranged in the air passage cavity.

[0008] Further, the sound-absorbing material is sound-absorbing cotton, sound-absorbing felt or foamed material.

[0009] Further, the shell has an annular cavity.

[0010] Further, a first counterbore is arranged at the center of the upper cover plate, a plurality of first positioning columns are uniformly distributed around the first counterbore, a second positioning column corresponding to the first counterbore is installed on the lower side of the gland, and a positioning cap corresponding to the first positioning column is uniformly distributed around the second positioning column.

[0011] By inserting the second positioning column into the first counterbore and fixing and mounting by screw, the first positioning column is fixed and mounted with the positioning cap, so that the upper cover plate is fixed and mounted with the gland.

[0012] Further, the first ventilation hole is a vertical long hole circumferentially distributed on the side wall of the motor shell.

[0013] Further, the second ventilation hole is a fan-shaped hole circumferentially arranged on the upper cover plate.

[0014] Further, the second ventilation hole is close to the center position of the upper cover plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model discloses a noise reduction cavity is arranged between the motor shell and the shell, and sound-absorbing material is filled in the noise reduction cavity, so that airflow can be smoothly discharged from the passage, and the noise generated by motor operation and airflow high-speed circulation can be absorbed by the sound-absorbing material, the sound-absorbing material is arranged in the ventilation cavity, secondary noise reduction treatment is carried out on the noise generated by airflow high-speed circulation, and the shell is arranged as a structure with annular cavity, sound-absorbing material can be filled in the cavity as required, and comprehensive noise reduction treatment is carried out on the dust collector. This structure can be applied to small equipment, is simple in structure, saves space more, and is simple and convenient in manufacturing process and low in cost. Multiple noise reduction treatments of the noise generated by the motor can better reduce the noise, achieve the effect that the noise is greatly reduced without affecting the power of the motor, and provide better use experience for the equipment.

[0017] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be explained in further detail below in combination with the drawings and specific embodiments,

[0019] Figure 1 It is a low-noise dust collector overall structure cutaway schematic view;

[0020] Figure 2 It is a low-noise dust collector partial part structure schematic view;

[0021] Figure 3 It is a gland structure schematic view;

[0022] Figure 4 It is a low-noise dust collector internal structure schematic view;

[0023] The figure label: 1, the shell; 11, annular cavity;2, motor housing;21, motor;3, noise reduction cavity;12, upper cover plate;121, recess;122, first counterbore;123, first positioning column;124, second counterbore;5, gland;51, second positioning column;52, positioning cap;6, air cavity;7, first air hole;8, second air hole;9, gap. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only the basic structure of the utility model is schematically shown, so it only shows the structure related to the utility model.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another component, it can be directly disposed on another component or indirectly disposed on another component;When a component is referred to as "connected to" another component, it can be directly connected to another component or indirectly connected to another component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] Please refer to Figures 1-4 The utility model provides a low noise dust catcher, including shell 1 and install in the inside of shell 1 motor housing 2, the motor housing 2 and shell 1 between the formation section is inverted L type noise reduction cavity 3, shell 1 includes upper cover plate 12, and the upper cover plate 12 center installs the gland 5, and the gland 5 and the upper cover plate 12 between the formation air cavity 6.

[0028] The lower end side wall of the motor housing 2 is provided with a first air hole 7 for communication with the noise reduction cavity 3, and the upper cover plate 12 is provided with a second air hole 8 for communication with the noise reduction cavity 3, and the outer edge of the gland 5 and the upper cover plate 12 have a gap 9 for air flow out;Noise reduction cavity 3 is provided with sound-absorbing material, and the sound-absorbing material fills the entire noise reduction cavity 3;Air cavity 6 is provided with sound-absorbing material;The sound-absorbing material uses sound-absorbing cotton or sound-absorbing felt or foamed material;

[0029] In this embodiment, the drive motor's internal fan starts rotating and generates a large amount of airflow. Both the motor's operation and the high-speed airflow generate a lot of noise. The motor housing 2 installed outside the motor can block some of the noise. The airflow enters the noise reduction cavity 3 through several first vent holes 7 set on the side wall of the motor housing 2. Since the noise reduction cavity 3 is filled with sound-absorbing material, the airflow can pass smoothly through the noise reduction cavity 3 and enter the ventilation cavity 6 through the second vent hole 8. The noise generated by the high-speed airflow is absorbed by the sound-absorbing material inside the noise reduction cavity 3. At the same time, sound-absorbing material is set in the ventilation cavity 6. The airflow enters the ventilation cavity 6 vertically through the second vent hole 8, and the noise generated is absorbed by the sound-absorbing material inside the ventilation cavity 6, performing secondary noise reduction treatment. This makes the airflow flowing out from the gap 9 between the outer edge of the pressure cover 5 and the upper cover plate 12 low noise, achieving a significant reduction in noise without affecting the motor power.

[0030] As shown in the figure, the first vent 7 consists of several vertically elongated holes distributed circumferentially on the side wall of the motor housing 2. The second vent 8 consists of several fan-shaped holes arranged circumferentially on the upper cover plate. The second vent 8 is located near the center of the upper cover plate 12.

[0031] In this embodiment, the first vent 7 is configured as several vertical elongated holes to increase the flow of gas and make the motor exhaust smoother; the second vent 8 is configured as several fan-shaped holes, which can also enhance the flow of air; the second vent 8 is positioned close to the center of the upper cover plate 12 to lengthen the flow length of air after it enters the ventilation cavity 6, and the sound-absorbing material added to the ventilation cavity 6 can better absorb noise.

[0032] like Figure 2 As shown, the upper side of the upper cover plate 12 has a recessed cavity 121.

[0033] In this embodiment, the airflow flows into the ventilation cavity 6 from the second vent hole 8. Since the lower side of the upper cover plate 12 is a concave cavity 121, the airflow flows out in an upward diverging shape through the gap 9 formed between the upper cover plate 12 and the edge of the pressure cover 5, which can disperse the force of the airflow and prevent the airflow speed from being too fast and affecting the user's use of the device.

[0034] like Figure 1 As shown, the outer shell 1 has an annular cavity 11.

[0035] In this embodiment, the outer shell 1 is designed with an annular cavity 11, into which sound-absorbing material can be filled as needed for further noise reduction. Figure 2 and Figure 3As shown, the upper cover plate 12 is provided with a first counterbore 122 in the center, and a plurality of first positioning columns 123 are uniformly distributed around the first counterbore 122; the lower side of the pressure cover 5 is provided with a second positioning column 51 corresponding to the first counterbore 122, and a positioning cap 52 corresponding to the first positioning column 123 is uniformly distributed around the second positioning column 51;

[0036] By inserting the second positioning column 51 into the first counterbore 122 and fixing and installing by means of a screw, and by fixing and installing the first positioning column 123 and the positioning cap 52, the upper cover plate 12 and the pressure cover 5 are fixed and installed.

[0037] In the present embodiment, the first counterbore 122 is communicated to the motor shell 2, the second positioning column 51 on the lower side of the pressure cover 5 is inserted into the first counterbore 122, and a bolt is inserted from the first counterbore 122 on the upper side wall of the motor shell 2 and is tightened; at the same time, the first positioning column 123 and the positioning cap 52 are buckled one by one, the first positioning column 123 is provided with a second counterbore 124 inside, the second counterbore 124 is also communicated to the motor shell 2, a bolt is inserted from the second counterbore 12 on the upper side wall of the motor shell 2 and is tightened, and at this time, the fixing and installation of the pressure cover 5 is completed. The pressure cover 5 is a detachable component, which facilitates the cleaning of the pressure cover 5 and the second air vent 8, ensures the smoothness of air outlet, and improves the efficiency.

[0038] It should be understood that the specific embodiments described above are only used to explain the present application, and are not used to limit the present application. The obvious changes or modifications derived from the spirit of the present application are still within the protection scope of the present application.

Claims

1. A low noise vacuum cleaner characterised in that, The utility model provides a motor shell and the shell are connected through the noise reduction cavity, and the noise reduction cavity is filled with sound absorption material, so that the noise of the motor is reduced. The upper cover plate (12) is concave on the upside.

2. The low noise vacuum cleaner of claim 1, wherein, The noise reduction cavity (3) is filled with sound absorption material.

3. The low noise vacuum cleaner of claim 1, wherein, The ventilation cavity (6) is provided with sound absorption material.

4. The low noise cleaner of claim 1, wherein, The sound absorption material is sound absorption cotton, sound absorption felt or foamed material.

5. A low noise cleaner as claimed in claim 3 or 4 wherein, The upper cover plate (12) is provided with a first counterbore (122) in the center, and a plurality of first positioning columns (123) are uniformly distributed around the first counterbore (122).

6. The low noise vacuum cleaner of claim 1, wherein, The second positioning column (51) is inserted into the first counterbore (122) and fixed by a screw, and the first positioning column (123) and the positioning cap (52) are fixedly installed, so that the upper cover plate (12) and the gland (5) are fixedly installed. The first ventilation hole (7) is a vertical long hole circumferentially distributed on the side wall of the motor shell (2).

7. The low noise vacuum cleaner of claim 1, wherein, The second ventilation hole (8) is a fan-shaped hole circumferentially arrayed on the upper cover plate (12).

8. The low noise vacuum cleaner of claim 1, wherein, The second ventilation hole (8) is close to the center position of the upper cover plate (12).

9. The low noise vacuum cleaner of claim 1, wherein, ​

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