Rotor capable of reducing noise

Abstract

A rotor capable of improving noise comprises a rotor main body and a rotor shaft body, a plurality of elastic arms are distributed on the rotor main body, a plurality of salient points are distributed on the rotor shaft body, and the rotor shaft body elastically moves up and down on the rotor main body through the matching of the salient points and the elastic arms; one end of the elastic arm is provided with an action point, and the elastic arm elastically acts on the salient point through the action point; and the acting points are in surface contact with the salient points. According to the rotor provided by the utility model, the plurality of elastic arms are distributed on the rotor main body, the plurality of salient points are distributed on the rotor shaft body, and the rotor shaft body elastically moves up and down on the rotor main body through the matching of the salient points and the elastic arms, so that a gap between the rotor and a motor shell can be eliminated after the rotor is arranged on the motor shell; therefore, the rotor does not move up and down along the central shaft when rotating, and the noise is reduced; in addition, the elastic arm is integrally arranged on the rotor main body, so that the structure of the rotor is simpler, the assembling problem does not need to be considered, and the manufacturing cost is also reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor that can improve noise. Background Technology

[0002] Chinese Patent Document No. CN210074991U, published on February 14, 2020, discloses an electric motor, specifically a motor with an elastic connection structure between the rotor and the rotor shaft. In the prior art, the motor rotor and its associated rotor shaft structure cause the rotor to collide with the housing, generating significant noise. To address the aforementioned deficiencies in the prior art, this invention provides a motor with an elastic connection structure between the rotor and the rotor shaft. The motor of this invention, including the aforementioned connection mechanism, comprises a rotor assembly, a lower housing, a stator assembly, a lead wire assembly, a top cover, a rotor shaft assembly, and a central shaft. The rotor assembly further includes a rotor, a rotor shaft, and a spring. When the rotor assembly rotates under power, the elastic support of the spring in the middle of the rotor assembly eliminates the gap with the top cover, preventing the rotor assembly from undulating during operation and significantly reducing noise. However, the addition of the spring complicates the rotor assembly structure, increases assembly difficulty, and raises manufacturing costs.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a rotor that is simple in structure, low in noise, easy to assemble, low in cost, and highly practical, thereby overcoming the shortcomings of the prior art.

[0005] A rotor designed for this purpose to improve noise includes a rotor body and a rotor shaft mounted on the rotor body. The rotor body is characterized by having a plurality of elastic arms distributed on it and a plurality of protrusions distributed on it. The rotor shaft moves up and down elastically on the rotor body through the cooperation of the protrusions and the elastic arms.

[0006] One end of the elastic arm is provided with an action point, and the elastic arm acts elastically on the protrusion through the action point.

[0007] The point of application and the convex point are in surface contact.

[0008] The rotor body has an inner hole at its center, and the elastic arm is suspended on the inner hole.

[0009] The elastic arm is strip-shaped.

[0010] The inner hole is surrounded by several positioning ribs, and the rotor shaft is surrounded by several positioning notches. The positioning ribs are inserted into the positioning notches.

[0011] The elastic arms are distributed in a ring on the inner hole, and the protrusions are distributed in a ring on the rotor shaft.

[0012] The rotor body includes an outer ring and an intermediate rubber component located at the center of the outer ring. An elastic arm is integrally mounted on the intermediate rubber component, and an inner hole is located at the center of the intermediate rubber component.

[0013] It also includes a rotating shaft, with a column at the center of the inner hole, a first rotating hole on the column, and a second rotating hole on the rotor shaft. The rotating shaft passes through the first rotating hole and the second rotating hole in sequence.

[0014] Several connecting ribs are distributed in a ring on the inner hole. One end of the connecting rib is connected to the side wall of the inner hole, and the other end is connected to the column. An elastic arm is set on one side of the connecting rib.

[0015] The rotor of this invention features several elastic arms distributed on its main body and several protrusions distributed on its shaft. The rotor shaft moves up and down elastically on the main body through the cooperation of the protrusions and elastic arms. This eliminates the gap between the rotor and the motor housing after the rotor is installed, thus preventing the rotor from moving up and down along the central axis during rotation and improving noise. In addition, the elastic arms are integrally set on the main body, making the rotor structure simpler and eliminating the need to consider assembly issues, while also reducing manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the rotor in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the rotor in one embodiment of the present invention.

[0018] Figure 3 This is an exploded structural diagram of the rotor in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the rotor body in one embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the overall structure of the rotor shaft in one embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See Figures 1-5The rotor, which can improve noise, includes a rotor body 1 and a rotor shaft 2 mounted on the rotor body 1. The side wall of the rotor shaft 2 is provided with a number of annularly distributed teeth. The rotor body 1 is provided with a number of elastic arms 3, which are elastic. The bottom of the rotor shaft 2 is provided with a number of protrusions 4. The rotor shaft 2 moves up and down elastically on the rotor body 1 through the cooperation of the protrusions 4 and the elastic arms 3. The rotor body 1 is supported by the lower shell of the motor housing, and the rotor shaft 2 is supported by the upper cover of the motor housing.

[0023] One end of the elastic arm 3 is provided with an action point 5. The elastic arm 3 acts elastically on the protrusion 4 through the action point 5, and the action point 5 and the protrusion 4 can make precise elastic contact.

[0024] The point of application 5 and the convex point 4 are in surface contact to make the contact stress distribution more uniform.

[0025] The rotor body 1 has an inner hole 6 at its center, and the elastic arm 3 is suspended on the inner hole 6. The suspended design of the elastic arm 3 can enhance the elastic deformation ability of the elastic arm 3, thereby making the rotor shaft 2 move up and down more stably on the rotor body 1.

[0026] The elastic arm 3 is strip-shaped, which makes the elastic arm 3 more flexible and improves the elasticity of the elastic arm 3.

[0027] The inner hole 6 is surrounded by several positioning ribs 7, and the rotor shaft 2 is surrounded by several positioning notches 8. The positioning ribs 7 are inserted into the positioning notches 8. This structure ensures that the rotor body 1 and the rotor shaft 2 can rotate synchronously.

[0028] The elastic arms 3 are distributed in a ring on the inner hole 6, and the protrusions 4 are distributed in a ring at the bottom of the rotor shaft 2. In this embodiment, three elastic arms 3 and three protrusions 4 are provided respectively, so that the rotor body 1 is subjected to more uniform force, thereby improving the structural stability of the rotor.

[0029] The rotor body 1 includes an outer ring 13 and an intermediate plastic part 14 disposed at the center of the outer ring 13. An elastic arm 3 is integrally disposed on the intermediate plastic part 14, and an inner hole 6 is disposed at the center of the intermediate plastic part 14. The outer ring 13 is a magnetic ring, and the intermediate plastic part 14 is an injection part. The intermediate plastic part 14 is formed by injection molding through the inner hole of the outer ring 13, so that the outer ring 13 and the intermediate plastic part 14 are integrally disposed. The intermediate plastic part 14 and the rotor shaft 2 are made of plastic.

[0030] It also includes a rotating shaft. A column 9 is provided at the center of the inner hole 6. A first rotating hole 10 is provided on the column 9. A second rotating hole 11 is provided on the rotor shaft 2. The rotating shaft passes through the first rotating hole 10 and the second rotating hole 11 in sequence, so that the rotor can rotate around the rotating shaft. The rotating shaft is the central shaft of the motor.

[0031] Several connecting ribs 12 are distributed in a ring on the inner hole 6. One end of the connecting rib 12 is connected to the side wall of the inner hole 6 and the other end is connected to the column 9. The elastic arm 3 is set on one side of the connecting rib 12. This structure can improve the structural strength of the intermediate rubber part 14. The connecting rib 12, the column 9 and the positioning rib 7 are integrally set on the intermediate rubber part 14.

[0032] The rotor shaft 2 includes a main body 15, a gear 16 is provided on the upper part of the main body 15, and a protrusion 4 is provided at the bottom of the main body 15.

[0033] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotor capable of improving noise, comprising a rotor body (1) and a rotor shaft (2) mounted on the rotor body (1), characterized in that: The rotor body (1) has several elastic arms (3) distributed on it, and the rotor shaft (2) has several protrusions (4) distributed on it. The rotor shaft (2) moves up and down elastically on the rotor body (1) through the cooperation of the protrusions (4) and the elastic arms (3).

2. The rotor with noise reduction capability according to claim 1, characterized in that: One end of the elastic arm (3) is provided with an action point (5), and the elastic arm (3) acts elastically on the protrusion (4) through the action point (5).

3. The rotor with noise reduction capability according to claim 2, characterized in that: The point of action (5) and the convex point (4) are in surface contact.

4. The rotor with noise reduction capability according to claim 2, characterized in that: The rotor body (1) has an inner hole (6) at its center, and the elastic arm (3) is suspended on the inner hole (6).

5. The rotor with noise reduction capability according to claim 2, characterized in that: The elastic arm (3) is strip-shaped.

6. The noise-reducing rotor according to claim 4, characterized in that: The inner hole (6) is surrounded by several positioning ribs (7), and the rotor shaft (2) is surrounded by several positioning notches (8). The positioning ribs (7) are inserted into the positioning notches (8).

7. The rotor with noise reduction capability according to claim 4, characterized in that: The elastic arm (3) is distributed in a ring on the inner hole (6), and the protrusion (4) is distributed in a ring on the rotor shaft (2).

8. The rotor with noise reduction capability according to claim 4, characterized in that: The rotor body (1) includes an outer ring body (13) and an intermediate rubber part (14) disposed at the center of the outer ring body (13). An elastic arm (3) is integrally disposed on the intermediate rubber part (14), and an inner hole (6) is disposed at the center of the intermediate rubber part (14).

9. The rotor with noise reduction capability according to claim 8, characterized in that: It also includes a rotating shaft, with a column (9) at the center of the inner hole (6), a first rotating hole (10) on the column (9), and a second rotating hole (11) on the rotor shaft (2). The rotating shaft passes through the first rotating hole (10) and the second rotating hole (11) in sequence.

10. The noise-reducing rotor according to claim 9, characterized in that: Several connecting ribs (12) are distributed in a ring on the inner hole (6). One end of the connecting rib (12) is connected to the side wall of the inner hole (6), and the other end is connected to the column (9). The elastic arm (3) is set on one side of the connecting rib (12).

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