Low-noise motor rotor

Abstract

The utility model relates to a low-noise motor rotor, which comprises a rotating shaft, an upper cover body and a lower cover body, an annular sound insulation assembly is fixed between the two cover bodies; an inner layer is arranged on the inner peripheral wall of the sound insulation assembly; a plurality of protruding blocks are arranged on the inner circumferential wall of the inner layer. According to the low-noise motor rotor, the cover body is arranged, noise generated when the motor rotor works is isolated through the characteristic that vacuum cannot transmit sound, the multiple protruding blocks are arranged, sound insulation cotton is arranged in the multiple protruding blocks, the noise generated by the motor rotor can be rebounded, and in the rebounding process, the noise generated by the motor rotor can be effectively reduced. Noise generated by the motor rotor is absorbed through the sound insulation cotton arranged in the convex block, so that the purpose of eliminating the noise is achieved; and by arranging the sound insulation assembly, the noise generated by the motor rotor can be further reduced, the noise generated when the motor rotor works is greatly reduced, and a quiet operation space is provided for operators.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a low-noise motor rotor. Background Art

[0002] A rotor motor is a motor that uses electromagnetic induction to drive an eccentric rotor to rotate to generate vibration. The rotor motor is relatively cheap and has a simple manufacturing process, but it is relatively large in size. In addition, the vibration start-up of the rotor motor is relatively slow and there is no obvious sense of vibration direction.

[0003] For example, Chinese utility model patent: Publication No. CN219268633U discloses a low-noise motor rotor, and its technical solution is: a motor rotor, a noise reduction component is arranged on the surface of the motor rotor; the noise reduction component includes a sound reduction cover movably connected to the motor rotor, a sound-absorbing cavity is opened inside the sound reduction cover, the inner cavity of the sound-absorbing cavity is fixedly connected with a plurality of keel frames distributed at equal intervals, a sound insulation board is fixedly connected between two adjacent keel frames, an outer cover is provided on the surface of the sound reduction cover, gaskets are fixedly connected to the front and rear sides of the sound reduction cover, a shock-absorbing sleeve is fixedly connected to one side of the gasket, the surface of the shock-absorbing sleeve is rotatably connected to the motor rotor, and a plurality of convex blocks distributed at equal intervals are fixedly connected to the opposite sides of the two gaskets.

[0004] The applicant has found through searching that there are still some problems in the above technical solution that need to be improved. For example, when reducing the noise of the motor rotor, although the noise emitted by the motor rotor can be alleviated by the noise reduction component, the noise generated by the motor rotor will still be transmitted through the gaps between multiple fixing frames, resulting in poor noise reduction effect on the motor rotor. For this reason, we propose a low-noise motor rotor to solve the above problems to ensure the noise reduction of the motor rotor during operation. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a low-noise motor rotor having the advantages of better noise reduction effect and the like, and solves the problem that noise is transmitted through the gaps between multiple fixing frames.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise motor rotor, comprising a rotating shaft and two upper and lower covers;

[0007] A ring-shaped sound insulation component is fixed between the two covers;

[0008] The inner peripheral wall of the sound insulation component is provided with an inner layer;

[0009] The inner peripheral wall of the inner layer is provided with a plurality of protrusions.

[0010] Furthermore, the plurality of protrusions are respectively mounted on the inner peripheral wall of the inner layer and are distributed at equal intervals, the plurality of protrusions are connected to each other, and mounting holes are provided inside the protrusions.

[0011] Furthermore, the cross-section of the protrusion is semicircular, and sound insulation cotton is fixed inside the mounting hole.

[0012] Furthermore, a fixing frame is fixed on the outer surface of the rotating shaft, and a plurality of rotor bodies are fixed on the outer surface of the fixing frame and are evenly distributed on the outer surface of the fixing frame.

[0013] Furthermore, a ring-shaped air hole is opened inside the inner layer, and a vacuum is formed inside the air hole; and the interiors of the two covers are both in a vacuum state.

[0014] Furthermore, the sound insulation component includes an adhesive layer bonded to the outer surface of the inner layer, and the outer surface of the adhesive layer is bonded with the sound insulation layer.

[0015] Furthermore, the bonding layer is an adhesive, and the sound insulation layer is rock wool.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] The low-noise motor rotor is provided with a cover body, and utilizes the characteristic that a vacuum cannot transmit sound to isolate the noise generated when the motor rotor is working. Furthermore, by providing a plurality of protrusions and sound-proofing cotton in the plurality of protrusions, the noise generated by the motor rotor can be rebounded. During the rebound process, the noise generated by the motor rotor is absorbed by the sound-proofing cotton in the protrusions, thereby achieving the purpose of eliminating the noise. Furthermore, by providing a sound-proofing component, the noise generated by the motor rotor can be further reduced, thereby greatly reducing the noise generated when the motor rotor is working, and providing a quieter operating space for operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the cross section of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the top plan structure of the cover body, sound insulation assembly, inner layer, protrusions and sound insulation cotton of the utility model.

[0022] In the figure: 1. rotating shaft; 2. cover body; 3. sound insulation component; 31. adhesive layer; 32. sound insulation layer; 4. inner layer; 5. bump; 6. sound insulation cotton; 7. fixing frame; 8. rotor body. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in 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 in 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.

[0024] See also Figure 1 , Figure 2 as well as Figure 3 A low-noise motor rotor in this embodiment includes a rotating shaft 1 and two upper and lower covers 2 .

[0025] An annular sound insulation component 3 is fixed between the two cover bodies 2, a plurality of protrusions 5 are provided on the inner circumferential wall of the inner layer 4, the cross-section of the protrusion 5 is semicircular, a fixing frame 7 is fixed on the outer surface of the rotating shaft 1, and a plurality of rotor bodies 8 are fixed on the outer surface of the fixing frame 7 and are equidistantly distributed on the outer surface of the fixing frame 7.

[0026] During operation, the rotor body 8 will generate noise. The noise generated by the rotor body 8 is reduced by evacuating the hollow space inside the cover body 2 into a vacuum under the action of the cover body 2 fixed at the upper and lower ends of the inner layer 4, and utilizing the characteristic that a vacuum cannot transmit sound. This avoids the noise generated by the rotor body 8 from being transmitted through the upper and lower ends of the inner layer 4.

[0027] See also Figure 1 as well as Figure 4In order to reduce the noise generated by the rotor body 8 when working, the inner circumferential wall of the sound insulation component 3 in this embodiment is provided with an inner layer 4; a plurality of protrusions 5 are respectively installed on the inner circumferential wall of the inner layer 4 and are equidistantly distributed, and the plurality of protrusions 5 are connected to each other, and a mounting hole is also opened inside the protrusion 5, and a sound insulation cotton 6 is fixed inside the mounting hole, and an annular air hole is opened inside the inner layer 4, and the air hole is in a vacuum state; the interiors of the two covers 2 are in a vacuum state, and the sound insulation component 3 includes an adhesive layer 31 bonded to the outer surface of the inner layer 4, and the adhesive layer 31 The outer surface is bonded with a sound insulation layer 32, and the bonding layer 31 is an adhesive. The adhesive is a substance with excellent bonding properties, which connects objects by bonding the surfaces through adhesion and cohesion. The sound insulation layer 32 is rock wool, which is melted at a high temperature of more than 1450°C and then centrifuged into fibers by an internationally advanced four-axis centrifuge at high speed. At the same time, a certain amount of adhesive, dust-proof oil and water-repellent agent are sprayed into the fiber, and then the fiber is collected by a cotton collector, and then solidified and cut after being spread by a pendulum method and a three-dimensional cotton method to form rock wool products of different specifications and uses.

[0028] When the rotor body 8 is working, noise will be generated, and the noise generated by the rotor body 8 is first transmitted through the air. When the noise generated by the rotor body 8 is transmitted to the protrusion 5, because the protrusion 5 is set to be arc-shaped, the arc has a larger reflection area, and the noise generated by the rotor body 8 rebounds through multiple protrusions 5. In the process of rebounding, the energy of the noise is consumed to achieve the purpose of noise reduction; the noise is further absorbed by the sound insulation cotton 6 arranged in the protrusion 5, thereby reducing the noise; and by opening pores in the inner layer 4 and evacuating the pores to a vacuum state, the characteristic that vacuum cannot transmit sound is utilized to achieve multiple noise reduction effects.

[0029] There are multiple protrusions 5 , and the multiple protrusions 5 are connected. By arranging the multiple protrusions 5 to be connected, the problem of the noise emitted by the rotor body 8 being transmitted through the gaps between the protrusions 5 can be effectively avoided.

[0030] In addition, by setting the sound insulation component 3, the adhesive layer 31 and the sound insulation layer 32 in the sound insulation component 3, the adhesive layer 31 can firmly fix the sound insulation layer 32 on the outer wall of the inner layer 4, and the setting of the sound insulation layer 32 can further absorb the noise, thereby greatly reducing the noise generated by the rotor body 8 when it is working.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low noise motor rotor, characterized in that: It comprises a rotating shaft (1) and two upper and lower covers (2); A ring-shaped sound insulation component (3) is fixed between the two cover bodies (2); The inner peripheral wall of the sound insulation component (3) is provided with an inner layer (4); The inner peripheral wall of the inner layer (4) is provided with a plurality of protrusions (5).

2. A low noise motor rotor according to claim 1, characterized in that: The plurality of protrusions (5) are respectively mounted on the inner peripheral wall of the inner layer (4) and are distributed at equal intervals. The plurality of protrusions (5) are all connected to each other, and mounting holes are also provided inside the protrusions (5).

3. A low noise motor rotor according to claim 2, characterized in that: The cross section of the protrusion (5) is semicircular, and sound insulation cotton (6) is fixed inside the mounting hole.

4. The low noise motor rotor according to claim 1, characterized in that: A fixing frame (7) is fixed to the outer surface of the rotating shaft (1), and a plurality of rotor bodies (8) are fixed to the outer surface of the fixing frame (7) and are distributed at equal intervals on the outer surface of the fixing frame (7).

5. The low noise motor rotor according to claim 1, characterized in that: The inner layer (4) is provided with an annular air hole, and the air hole is in a vacuum state; the interiors of the two cover bodies (2) are both in a vacuum state.

6. The low noise motor rotor according to claim 1, characterized in that: The sound insulation component (3) comprises an adhesive layer (31) bonded to the outer surface of the inner layer (4), and a sound insulation layer (32) is bonded to the outer surface of the adhesive layer (31).

7. A low noise motor rotor according to claim 6, characterized in that: The bonding layer (31) is an adhesive, and the sound insulation layer (32) is rock wool.

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