A noise reduction motor

Abstract

The invention discloses a noise reduction motor, including: a motor housing; a mounting seat, which includes a stator cavity and a rotor cavity, the mounting seat is located in the motor housing, so that an air flow channel is formed between the mounting seat and the motor housing; a plurality of inclined air guide plates, the mounting seat and the motor housing are fixedly connected through the plurality of air guide plates; a rotor bearing, which is installed in the rotor cavity; a stator, which is installed in the stator cavity; a rotor with a fan blade, one end of the rotor passes through the rotor bearing and extends into the stator; a shock-absorbing rubber sleeve, which is sleeved outside the motor housing. When the airflow flows through the air flow channel with multiple air guide plates built in, a swirl flow is generated, which enhances the stability of air pressure fluctuations and effectively reduces the wind noise generated when the airflow flows through the air flow channel; in addition, the shock-absorbing rubber sleeve can reduce the vibration generated by the motor when it is working, further improving the noise reduction performance of the invention.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a noise-reducing motor. Background Art

[0002] Although the existing motors used in hair dryers or vacuum cleaners have the advantages of high speed and small size, they generate high decibel noise when working, which seriously affects the life and study of people around. In view of this, it is necessary to improve the existing motors to solve the above problems. Summary of the invention

[0003] The invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention proposes a noise reduction motor that can effectively reduce the noise generated during operation.

[0004] A noise reduction motor according to a first aspect of an embodiment of the present invention includes:

[0005] Motor housing;

[0006] A mounting seat, comprising a stator cavity and a rotor cavity, wherein the stator cavity is communicated with the rotor cavity, and the mounting seat is located in the motor housing so that an air flow channel is formed between the mounting seat and the motor housing;

[0007] A plurality of obliquely arranged air guide plates, the mounting seat and the motor housing are fixedly connected via the plurality of air guide plates, and the plurality of air guide plates are annularly arranged in the air flow channel;

[0008] A rotor bearing, mounted in the rotor cavity;

[0009] a stator, which is installed in the stator cavity;

[0010] A rotor with a fan blade, one end of the rotor passes through the rotor bearing and extends into the stator, the fan blade is located outside the motor housing, and the fan blade forms an airflow flowing through the air flow channel;

[0011] The shock-absorbing rubber sleeve is sleeved outside the motor housing.

[0012] A noise reduction motor according to an embodiment of the present invention has at least the following beneficial effects: since each air guide plate is arranged at an angle, when the air flow passes through the air flow channel with multiple air guide plates built in, a swirl will be generated, thereby enhancing the stability of air pressure fluctuations and effectively reducing the wind noise generated when the air flow passes through the air flow channel, thereby achieving the purpose of noise reduction; in addition, the shock-absorbing rubber sleeve can reduce the vibration generated by the motor during operation, further improving the noise reduction performance created by the present invention.

[0013] According to some embodiments of the present invention, the inclination angle of each of the air guide plates is consistent.

[0014] According to some embodiments of the present invention, the inclination angle of the air guide plate is 10°-25°.

[0015] According to some embodiments of the present invention, each of the air guide plates is an arc-shaped plate, and each of the arc-shaped plates is convexly arranged toward the same rotation direction.

[0016] According to some embodiments of the present invention, the rotor includes a rotating shaft, a rotor core, a preload spring, a counterweight bearing and the rotor bearing, and the rotor core, rotor bearing and counterweight bearing are fixedly mounted on the rotating shaft in sequence from back to front.

[0017] According to some embodiments of the present invention, the preload spring is located between the rotor bearing and the counterweight bearing, and both ends of the preload spring are respectively abutted against the rotor bearing and the counterweight bearing, so that the counterweight bearing and the rotor bearing are synchronously arranged.

[0018] According to some embodiments of the present invention, the fan blade is fixedly connected to the front end of the rotating shaft, so that the fan blade is synchronously arranged with the rotating shaft.

[0019] According to some embodiments of the present invention, a serration portion is provided at one end of the shock-absorbing rubber sleeve, and the serration portion is located at the outer periphery of the wind blade.

[0020] According to some embodiments of the present invention, a groove is provided on the outer peripheral surface of the motor housing, and a grounding male terminal is fixed in the groove.

[0021] According to some embodiments of the present invention, the motor housing and the grounding male terminal are both conductors.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a three-dimensional structural schematic diagram of a noise reduction motor according to an embodiment of the invention;

[0025] Figure 2 is another three-dimensional structural schematic diagram of a noise reduction motor according to an embodiment of the invention;

[0026] Figure 3This is a product explosion diagram of a noise reduction motor according to an embodiment of the present invention;

[0027] Figure 4 yes Figure 2 A top view of the noise reduction motor is shown;

[0028] Figure 5 yes Figure 4 A cross-sectional view of the noise reduction motor shown along the AA section line;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of a motor housing according to an embodiment of the present invention.

[0030] In the accompanying drawings: 100-motor housing, 200-mounting seat, 401-rotor bearing, 300-statator, 600-shock-absorbing rubber sleeve, 500-fan blade, 400-rotor, 101-air flow channel, 102-air guide plate, 310-stator cavity, 410-rotor cavity, 402-rotating shaft, 403-rotor core, 404-preload spring, 405-counterweight bearing, 610-serrated part, 301-winding, 302-power terminal seat, 320-stator rubber groove, 411-bearing rubber groove, 110-groove, 111-grounding male terminal. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, “several” means one or more, “more” means more than two, “greater than”, “less than”, “exceed”, etc. are understood to exclude the number, and “above”, “below”, “within”, etc. are understood to include the number.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0035] like Figures 1 to 6 As shown, a noise reduction motor according to the first aspect of the embodiment created by the present invention includes a motor housing 100, a mounting seat 200, a rotor bearing 401, a stator 300, a shock-absorbing rubber sleeve 600, and a rotor 400 with a fan blade 500. The mounting seat 200 is located in the motor housing 100, so that an air flow channel 101 is formed between the mounting seat 200 and the motor housing 100. A plurality of inclined air guide plates 102 are provided between the mounting seat 200 and the motor housing 100. The mounting seat 200 and the motor housing 100 are fixedly connected through the plurality of air guide plates 102, and the plurality of air guide plates 102 are arranged in an annular manner in the air flow channel 101. Specifically, the inclination angle of each of the air guide plates 102 is consistent, and the inclination angle of the air guide plates 102 is 10°-25°, and the preferred inclination angle in this embodiment is 18°. Since each of the air guide plates 102 is arranged at an angle, a swirl is generated when the air flows through the air channel 101 with multiple air guide plates 102 built therein, thereby enhancing the stability of air pressure fluctuations and effectively reducing the wind noise generated when the air flows through the air channel 101, thereby achieving the purpose of noise reduction. In order to further improve the ability of the air guide plates 102 to generate swirls, each of the air guide plates 102 is an arc-shaped plate, and each of the arc-shaped plates is arranged to convexly face the same rotation direction.

[0036] At the same time, the mounting seat 200 includes a stator cavity 310 and a rotor cavity 410, and the stator cavity 310 is connected to the rotor cavity 410; Figure 5As shown, the stator 300 is installed in the stator cavity 310, the rotor bearing 401 is installed in the rotor cavity 410, one end of the rotor 400 passes through the rotor bearing 401 and extends into the stator 300, and the fan blade 500 is located outside the motor housing 100. When the fan blade 500 rotates, the fan blade 500 forms an airflow flowing through the air flow channel 101. Specifically, the rotor 400 includes a rotating shaft 402, a rotor core 403, a preload spring 404, a counterweight bearing 405 and the rotor bearing 401. The rotor core 403, the rotor bearing 401 and the counterweight bearing 405 are fixedly sleeved on the rotating shaft 402 in sequence from back to front. The preload spring 404 is located between the rotor bearing 401 and the counterweight bearing 405. The two ends of the preload spring 404 are respectively abutted against the rotor bearing 401 and the counterweight bearing 405, so that the counterweight bearing 405 is synchronously arranged with the rotor bearing 401, that is, the counterweight bearing 405, the preload spring 404 and the rotor bearing 401 form a whole; the fan blade 500 is fixedly connected to the front end of the rotating shaft 402, so that the fan blade 500 is synchronously arranged with the rotating shaft 402, that is, when the rotating shaft 402 rotates, the fan blade 500 also rotates with the rotating shaft 402. According to the structure of the above-mentioned rotor 400, the beneficial effects of this embodiment are: by arranging the counterweight bearing 405 and the rotor bearing 401 between the fan blade 500 and the rotor core 403, the balance and stability of the rotating shaft 402 during rotation can be effectively guaranteed; the front and rear pre-pressure generated by the pre-load spring makes the counterweight bearing 405 as close to the fan blade 500 as possible, reducing the end swing vibration of the rotor 400, reducing the noise generated by the rotor 400 during operation, and improving the service life of the motor.

[0037] like Figure 1 and Figure 3 As shown, in order to further improve the noise reduction performance of the invention, the shock-absorbing rubber sleeve 600 is sleeved outside the motor housing 100, and the shock-absorbing rubber sleeve 600 can reduce the vibration generated by the motor when it is working. In order to straighten the wind flow field of the fan blade 500 and thus reduce wind noise, a serration 610 is provided at one end of the shock-absorbing rubber sleeve 600, and the serration 610 is located on the outer periphery of the fan blade 500.

[0038] like Figure 2 and Figure 3As shown, in some embodiments of the present invention, at least three windings 301 are arranged in an internal ring shape of the stator 300, the rotor core 403 is surrounded by the multiple windings 301, and all the windings 301 are electrically connected to a power terminal block 302. The power terminal block 302 is used to connect an electrical signal to a controller (not shown in the drawings), so that the controller can control all the windings 301 according to an electrical control program, thereby controlling the direction and speed of the rotor 400.

[0039] like Figure 3 As shown, in some embodiments of the invention, in order to enable the stator 300 to be firmly installed in the stator cavity 310, three stator glue grooves 320 are provided on the outer wall surface of the stator 300, and the three stator glue grooves 320 are arranged in an annular manner on the outer wall surface of the stator 300; before installing the stator 300, the potting glue is first injected into each stator glue groove 320, and then the stator 300 is installed. If the stator 300 needs to be disassembled, it is only necessary to use a hot air gun to blow to the stator 300, and the stator 300 can be smoothly disassembled after the potting glue is melted. It can be understood that the number of the stator glue grooves 320 can also be two or four, and is not limited to this.

[0040] like Figure 6 As shown, in some embodiments of the invention, in order to enable the rotor bearing 401 on the rotor 400 to be firmly installed in the rotor cavity 410, four bearing glue grooves 411 are provided on the inner wall surface of the rotor cavity 410, and the four bearing glue grooves 411 are arranged in an annular manner on the inner wall surface of the rotor cavity 410; before installing the rotor bearing 401, the potting glue is first injected into each bearing glue groove 411, and then the rotor bearing 401 is installed, so as to install the rotor 400. If the rotor 400 needs to be disassembled, it is only necessary to use a hot air gun to blow to the rotor bearing 401, and the rotor 400 can be smoothly disassembled after the potting glue is melted. It can be understood that the number of the bearing glue grooves 411 can also be three or five, and is not limited to this.

[0041] In some embodiments of the invention, a groove 110 is provided on the outer peripheral surface of the motor housing 100, and a grounding male terminal 111 is fixedly provided in the groove 110. The motor housing 100 and the grounding male terminal 111 are both conductors; specifically, the grounding male terminal 111 is welded in the groove 110, and the grounding male terminal 111 is a pin structure, which can be detachably connected with a grounding female terminal (not shown in the drawings). When the grounding male terminal 111 is connected to the grounding female terminal, the motor housing 100 meets the grounding requirements. When the motor and the controller need to be separated, the grounding female terminal only needs to be removed from the grounding male terminal 111, and the motor can be removed separately. It can be understood that the grounding male terminal 111 and the groove 110 can also be integrally formed, but not limited to this.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A noise reduction motor, characterized in that: include: Motor housing (100); A mounting seat (200), comprising a stator cavity (310) and a rotor cavity (410), wherein the stator cavity (310) is in communication with the rotor cavity (410), and the mounting seat (200) is located in the motor housing (100), so that an air flow channel (101) is formed between the mounting seat (200) and the motor housing (100); a plurality of inclined air guide plates (102), each of the air guide plates (102) having a consistent inclination angle, the mounting seat (200) and the motor housing (100) being fixedly connected via the plurality of air guide plates (102), the plurality of air guide plates (102) being arranged in an annular manner in the air flow channel (101); A rotor bearing (401) mounted in the rotor cavity (410); A stator (300) installed in the stator cavity (310); a rotor (400) with a fan blade (500), one end of the rotor (400) passing through the rotor bearing (401) and extending into the stator (300), the fan blade (500) being located outside the motor housing (100), and the fan blade (500) forming an airflow that flows through the air flow channel (101); A shock-absorbing rubber sleeve (600) is sleeved outside the motor housing (100), and a sawtooth portion (610) is provided at one end of the shock-absorbing rubber sleeve (600), and the sawtooth portion (610) is located on the outer periphery of the fan blade (500).

2. A noise reduction motor according to claim 1, characterized in that: The inclination angle of the air guide plate (102) is 10°-25°.

3. A noise reduction motor according to claim 1 or 2, characterized in that: Each of the air guide plates (102) is an arc-shaped plate, and each of the arc-shaped plates is arranged to protrude outwards in the same rotation direction.

4. The noise reduction motor according to claim 1, characterized in that: The rotor (400) comprises a rotating shaft (402), a rotor core (403), a preload spring (404), a counterweight bearing (405) and the rotor bearing (401); the rotor core (403), the rotor bearing (401) and the counterweight bearing (405) are fixedly sleeved on the rotating shaft (402) in sequence from back to front.

5. The noise reduction motor according to claim 4, characterized in that: The preload spring (404) is located between the rotor bearing (401) and the counterweight bearing (405), and two ends of the preload spring (404) are respectively in contact with the rotor bearing (401) and the counterweight bearing (405), so that the counterweight bearing (405) and the rotor bearing (401) are synchronously arranged.

6. The noise reduction motor according to claim 4, characterized in that: The fan blade (500) is fixedly connected to the front end of the rotating shaft (402), so that the fan blade (500) and the rotating shaft (402) are synchronously arranged.

7. The noise reduction motor according to claim 1, characterized in that: A groove (110) is provided on the outer peripheral surface of the motor housing (100), and a grounding male terminal (111) is fixedly provided in the groove (110).

8. The noise reduction motor according to claim 7, characterized in that: The motor housing (100) and the grounding male terminal (111) are both conductors.

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