Direct current motor with noise reduction structure

Abstract

A direct current motor with a noise reduction structure provided by the present invention comprises a base, a motor body, a noise reduction assembly I and a noise reduction assembly II, the noise reduction assembly II is installed in the middle of the upper side of the base, the noise reduction assembly I is installed on the upper side of the noise reduction assembly II, the motor body is installed in the noise reduction assembly I, and the noise reduction assembly II is installed in the motor body. And the noise reduction assembly I comprises a shell I, a shell II and a lining, the shell II is mounted on the upper side of the shell I, and the shell II is fixed on the upper side of the shell I. Compared with the prior art, the motor has the following beneficial effects that the noise reduction assembly I is arranged, so that the noise reduction efficiency is improved under the condition that normal heat dissipation of the motor body is not influenced; and the second noise reduction assembly is arranged, so that vibration generated during operation of the motor body is prevented from directly acting on the air conditioner equipment, the purpose of reducing noise of the whole equipment is achieved, and the problem that low-frequency vibration can be transmitted to an air conditioner shell to generate unpleasant buzz sound is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of air-conditioning motor equipment, and in particular relates to a DC motor with a noise reduction structure. Background Art

[0002] High-frequency noise primarily originates from aerodynamic noise between the high-speed rotating rotor and stator during motor operation, as well as mechanical vibration caused by fluctuations in electromagnetic force. Minor imbalances or manufacturing defects in these high-speed rotating components can amplify the noise. Low-frequency hum is typically caused by factors such as magnetic field pulsation in the motor windings and magnetic saturation in the iron core. This low-frequency vibration can be transmitted to the air conditioner casing, producing an unpleasant humming sound. These shortcomings are closely related to the operating principles and structural design of DC motors.

[0003] Conventional approaches include adopting more sophisticated motor designs, such as optimizing the dynamic balance of the motor rotor, using low-noise bearings, improving the winding structure to reduce magnetic field pulsation, and employing effective electromagnetic shielding technology to reduce electromagnetic interference. Furthermore, improvements to motor control algorithms and optimization of motor operating parameters can be used to reduce vibration and noise during operation. However, the drawbacks of these approaches are that optimizing motor design often increases manufacturing cost and complexity, and it is difficult to completely eliminate noise. Therefore, we sought to design a DC motor with a novel structure to address this problem. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a DC motor with a noise reduction structure to solve the problems raised in the above background technology.

[0005] The present invention is achieved through the following technical solution: a DC motor with a noise reduction structure, comprising: a base, a motor body, a first noise reduction component, and a second noise reduction component, wherein the second noise reduction component is installed in the middle of the upper side of the base, the first noise reduction component is installed on the upper side of the second noise reduction component, and the motor body is installed inside the first noise reduction component;

[0006] The noise reduction component 1 includes a shell 1, a shell 2 and an inner lining, the shell 2 is mounted on the upper side of the shell 1, the shell 2 is fixed to the upper side of the shell 1 by bolts, and the inner lining is fixed inside the shell 1 and the shell 2;

[0007] The second noise reduction component includes a mounting plate, a movable support leg, and a compression spring. A movable support leg is welded to each of the four corners of the upper surface of the mounting plate, and a movable seat is movably mounted on the upper side of the mounting plate through multiple movable support legs.

[0008] As a preferred embodiment, the lining includes a high-density sponge pad and a sound insulation cotton pad. The outer side of the sound insulation cotton pad is fixedly connected to the inner side of the high-density sponge pad, and the outer wall of the high-density sponge pad is connected to the inner wall of the outer shell one and the outer shell two. The lining is not directly connected to the outer wall of the motor body, and a heat dissipation gap is provided between the two. In actual use, the heat generated by the motor body can be dissipated to both sides through the circular through hole between the outer shell one and the outer shell two, and most of the noise generated is offset by the lining inside the outer shell one and the outer shell two, thereby achieving the purpose of reducing the noise of the motor body.

[0009] As a preferred embodiment, the lining includes a high-density sponge pad and a sound insulation cotton pad. The outer side of the sound insulation cotton pad is fixedly connected to the inner side of the high-density sponge pad. The outer wall of the high-density sponge pad is connected to the inner walls of outer shell one and outer shell two. The lining is not directly connected to the outer wall of the motor body, and a heat dissipation gap is provided between the two.

[0010] As a preferred embodiment, the noise reduction component 2 further includes a tension spring, a compression spring, a shock-absorbing foot and a mounting box, the lower side of each movable support foot is movably connected to the upper end of a tension spring, and the lower end of the movable seat is sleeved with a compression spring;

[0011] A mounting box is provided in the middle of the lower surface of the mounting plate, the lower end of the movable seat passes through the mounting plate downward and extends into the interior of the mounting box, and a shock-absorbing foot is fixed to the lower surface of each of the four corners of the mounting plate.

[0012] As a preferred embodiment, a first hanging block is welded on the front side and rear side of the left end and the front side and rear side of the right end of the upper surface of the mounting plate, respectively, and the movable support leg includes a first hinge seat, a hinge rod and a second hanging block;

[0013] The upper end of the hinge seat is hinged to the lower end of the hinge rod, and a hanging block 2 is welded in the middle of the lower surface of the hinge rod. The hanging block 2 is placed just above the hanging block 1. The upper end of the tension spring is fixedly connected to the hinge rod through the hanging block 2, and the lower end of the tension spring is fixedly connected to the mounting plate through the hanging block 1.

[0014] As a preferred embodiment, a guide post is provided in the middle of the lower end of the movable seat, a magnetic plate with a circular structure is fixed to the lower end of the guide post, and a hinge seat 2 is provided on the left front side and the left rear side of the left end and the right front side and the right rear side of the right end of the movable seat respectively, and each of the hinge seats 2 is hinged to the upper end of a hinge rod;

[0015] The diameter of the magnetic plate is larger than the diameter of the guide post, and a guide hole is formed downwardly on the front, rear, left and right sides of the upper surface of the magnetic plate respectively. The guide post is arranged inside the compression spring, and the lower end of the compression spring abuts against the upper surface of the mounting plate, and the upper end of the compression spring abuts against the lower surface of the upper end of the movable seat. In actual use, the compression spring is in a pre-compression state, and its compression state is between half and two-thirds of its maximum compression stroke, while multiple tension springs are all in a stretched state, and the stretched state of multiple tension springs is half of their maximum stretching stroke. A rubber plate with a layer of rubber 1mm thick is glued to the lower surface of the magnetic plate to avoid direct collision between the magnetic plate and the magnetic ring.

[0016] As a preferred embodiment, the shock-absorbing foot includes a shock absorber, a telescopic sleeve, and a bottom plate. The upper side of the plate is fixedly connected to the lower end of the shock absorber, and the upper end of the shock absorber is fixedly connected to the lower surface of the mounting plate. The shock absorber is a spring damping shock absorber. The outer side of the shock absorber is provided with a telescopic sleeve, and the telescopic sleeve is a foldable bellows. A guide rod is welded to the front, rear, left, and right sides of the lower surface of the mounting plate located inside the mounting box.

[0017] The four guide rods are respectively slidably connected to the magnetic plate through a guide hole. A magnetic ring is fixed in the middle of the bottom of the installation box. The magnetic ring is fixedly connected to the lower ends of the four guide rods. The upper side of the magnetic ring is the N pole, and the lower side of the magnetic plate is the N pole, and the diameter of the magnetic plate is the same as the diameter of the magnetic ring.

[0018] After adopting the above technical solution, the beneficial effects of the present invention are as follows: by providing the noise reduction component 1, the shell 1 and the shell 2 cover the motor body, thereby protecting the motor body and isolating the noise to a certain extent. Furthermore, since the inner walls of the shell 1 and the shell 2 are provided with an inner lining formed by combining a high-density sponge pad and a sound insulation cotton pad, the noise inside the shell 1 and the shell 2 can be further offset, and the noise leakage can be effectively reduced without affecting the normal heat dissipation of the motor body.

[0019] The setting of the second noise reduction component prevents the vibration generated by the motor body during operation from directly affecting the air-conditioning equipment, thereby achieving the purpose of noise reduction of the entire equipment, and solving the problem that low-frequency vibration will be transmitted to the air-conditioning casing to produce an unpleasant buzzing sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 The figure is a schematic diagram of the overall structure of a DC motor with a noise reduction structure according to the present invention.

[0022] Figure 2 This is a schematic diagram of the second structure of a noise reduction component of a DC motor with a noise reduction structure according to the present invention.

[0023] Figure 3 This is a schematic diagram of the connection between the mounting box and the mounting plate of a DC motor with a noise reduction structure according to the present invention.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of a noise reduction component of a DC motor with a noise reduction structure according to the present invention.

[0025] Figure 5 This is a schematic diagram of the connection between a noise reduction component of a DC motor with a noise reduction structure and a motor body according to the present invention.

[0026] Figure 6 This is a schematic diagram of the connection between the first and second housings of a DC motor with a noise reduction structure according to the present invention.

[0027] In the figure, 100-base;

[0028] 200-motor body;

[0029] 300-Noise reduction component 1, 310-Shell 1, 320-Shell 2, 330-Inner lining;

[0030] 400-Noise reduction component 2, 410-Mounting plate, 411-Hanging block 1, 412-Guide rod, 420-Movable support foot, 421-Articulated seat 1, 422-Articulated rod, 423-Hanging block 2, 430-Movable seat, 431-Articulated seat 2, 432-Magnetic plate, 433-Guide column, 440-Tension spring, 450-Compression spring, 460-Shock-absorbing foot, 461-Shock absorber, 462-Telescopic sleeve, 463-Base plate, 470-Mounting box, 471-Magnetic ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 6The present invention provides a technical solution: a DC motor with a noise reduction structure, comprising: a base 100, a motor body 200, a first noise reduction component 300, and a second noise reduction component 400. The second noise reduction component 400 is installed in the middle of the upper side of the base 100, the first noise reduction component 300 is installed on the upper side of the second noise reduction component 400, and the motor body 200 is installed inside the first noise reduction component 300.

[0033] The noise reduction component 1 300 includes a first shell 310 , a second shell 320 , and an inner lining 330 . The second shell 320 is mounted on the upper side of the first shell 310 . The second shell 320 is fixed to the upper side of the first shell 310 by bolts. The inner lining 330 is fixed inside the first shell 310 and the second shell 320 .

[0034] The second noise reduction component 400 includes a mounting plate 410, a movable support leg 420, and a compression spring 450. A movable support leg 420 is welded to each of the four corners on the upper surface of the mounting plate 410, and a movable seat 430 is movably mounted on the upper side of the mounting plate 410 through multiple movable support legs 420.

[0035] See also Figure 1 、 Figure 5 as well as Figure 6 The lining 330 includes a high-density sponge pad and a sound-proof cotton pad. The outer side of the sound-proof cotton pad is fixedly connected to the inner side of the high-density sponge pad. The outer wall of the high-density sponge pad is connected to the inner wall of the outer shell 1 310 and the outer shell 2 320. The lining 330 is not directly connected to the outer wall of the motor body 200, and a heat dissipation gap is provided between the two. In actual use, the heat generated by the motor body 200 can be dissipated to both sides through the circular through holes between the outer shell 1 310 and the outer shell 2 320, and most of the noise generated is offset by the lining 330 inside the outer shell 1 310 and the outer shell 2 320, thereby achieving the purpose of reducing the noise of the motor body 200.

[0036] The lining 330 includes a high-density sponge pad and a sound-insulating cotton pad. The outer side of the sound-insulating cotton pad is fixedly connected to the inner side of the high-density sponge pad. The outer wall of the high-density sponge pad is connected to the inner wall of the outer shell 1 310 and the inner wall of the outer shell 2 320. The lining 330 is not directly connected to the outer wall of the motor body 200, and a heat dissipation gap is set between the two.

[0037] As the first embodiment of the present invention, by providing a noise reduction component 300, in actual use, during long-term use, gaps may be generated between the various components of the motor body 200 due to looseness, which may cause the motor body 200 to generate large noise during operation. At this time, the noise directly generated by the motor body 200 will enter between the shell 1 310 and the shell 2 320. Since the shell 1 310 and the shell 2 320 cover the motor body 200, while protecting the motor body 200, the noise can be isolated to a certain extent. Since the inner walls of the shell 1 310 and the shell 2 320 are provided with a lining 330 composed of a high-density sponge pad and a sound insulation cotton pad, the noise inside the shell 1 310 and the shell 2 320 can be further offset, and the noise leakage can be effectively reduced without affecting the normal heat dissipation of the motor body 200.

[0038] See also Figures 1 to 4 The second noise reduction component 400 also includes a tension spring 440, a compression spring 450, a shock-absorbing foot 460 and a mounting box 470. The lower side of each movable support foot 420 is movably connected to the upper end of a tension spring 440, and the lower end of the movable seat 430 is provided with a compression spring 450.

[0039] A mounting box 470 is provided in the middle of the lower surface of the mounting plate 410 , and the lower end of the movable seat 430 passes downward through the mounting plate 410 and extends into the interior of the mounting box 470 . A shock-absorbing foot 460 is fixed to the lower surface of each of the four corners of the mounting plate 410 .

[0040] A first hanging block 411 is welded to the front and rear sides of the left end and the front and rear sides of the right end of the upper surface of the mounting plate 410. The movable support leg 420 includes a first hinge seat 421, a hinge rod 422 and a second hanging block 423.

[0041] The upper end of the hinged seat 421 is hinged to the lower end of the hinged rod 422, and a hanging block 423 is welded in the middle of the lower surface of the hinged rod 422. The hanging block 423 is placed just above the hanging block 411. The upper end of the tension spring 440 is fixedly connected to the hinged rod 422 through the hanging block 423, and the lower end of the tension spring 440 is fixedly connected to the mounting plate 410 through the hanging block 411.

[0042] A guide post 433 is provided in the middle of the lower end of the movable seat 430. A circular magnetic plate 432 is fixed to the lower end of the guide post 433. A second hinge seat 431 is provided on the left front side and the left rear side of the left end and the right front side and the right rear side of the right end of the movable seat 430. Each second hinge seat 431 is hinged to the upper end of a hinge rod 422.

[0043] The diameter of the magnetic plate 432 is larger than the diameter of the guide post 433. A guide hole is formed downwardly on the front, rear, left and right sides of the upper surface of the magnetic plate 432. The guide post 433 is arranged inside the compression spring 450, and the lower end of the compression spring 450 abuts against the upper surface of the mounting plate 410, and the upper end of the compression spring 450 abuts against the lower surface of the upper end of the movable seat 430. In actual use, the compression spring 450 is in a pre-compression state, and its compression state is between half and two-thirds of its maximum compression stroke, while multiple tension springs 440 are all in a stretched state, and the stretched state of multiple tension springs 440 is half of its maximum stretching stroke. A layer of rubber plate 1mm thick is glued to the lower surface of the magnetic plate 432, which can avoid direct collision between the magnetic plate 432 and the magnetic ring 471.

[0044] Shock-absorbing foot 460 includes a shock absorber 461, a telescopic sleeve 462, and a base plate 463. The upper side of the base plate is fixedly connected to the lower end of the shock absorber 461, and the upper end of the shock absorber 461 is fixedly connected to the lower surface of the mounting plate 410. The shock absorber 461 is a spring-damped shock absorber 461. The outer side of the shock absorber 461 is provided with a telescopic sleeve 462, which is a foldable bellows. A guide rod is welded to the front, rear, left, and right sides of the lower surface of the mounting plate 410 located inside the mounting box 470.

[0045] The four guide rods are slidingly connected to the magnetic plate 432 through a guide hole respectively. A magnetic ring 471 is fixed in the middle of the bottom of the installation box 470. The magnetic ring 471 is fixedly connected to the lower ends of the four guide rods. The upper side of the magnetic ring 471 is the N pole, and the lower side of the magnetic plate 432 is the N pole, and the diameter of the magnetic plate 432 is the same as the diameter of the magnetic ring 471.

[0046] As the second embodiment of the present invention, based on the above-mentioned first embodiment, the noise reduction component 2 400 is set. In actual use, when the motor body 200 transmits the vibration to the movable seat 430 through the shell 2 320, the movable seat 430 has a tendency to move downward under the drive of the vibration energy. When the movable seat 430 moves downward, it will drive the upper ends of the hinged rods 422 on the four movable legs to move downward through the four hinged seats 2 431. At this point, the four tension springs 440 are gradually reset. At the same time, the movable seat 430 squeezes the compression spring 450 downward, so that the originally pre-compressed spring is squeezed again, which also makes the compression spring 450 have stronger recovery potential energy to offset the vibration energy. During the downward movement of the movable seat 430, due to the placement of the magnetic plate 432, On the upper side of the magnetic coil 471, and the upper side of the magnetic coil 471 is the N pole, and the lower side of the magnetic plate 432 is the N pole. According to the principle of like poles repel each other, the movable seat 430 moves downward and is subjected to a larger magnetic repulsive force. Combined with the recovery potential energy of the compression spring 450, the vibration energy can be effectively offset. When the compression spring 450 is squeezed, the mounting plate 410 is also synchronously compressed and the four shock-absorbing feet 460 on its lower side are squeezed. The telescopic sleeve 462 cooperates with the shock absorber 461 to synchronously dampen the mounting plate 410, thereby assisting in offsetting the vibration energy and avoiding the vibration generated during the operation of the motor body 200 directly affecting the air-conditioning equipment, thereby achieving the purpose of noise reduction of the entire equipment, and solving the problem that low-frequency vibration will be transmitted to the air-conditioning casing to produce an unpleasant buzzing sound.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A DC motor with a noise reduction structure, comprising: A base (100), a motor body (200), a noise reduction component 1 (300) and a noise reduction component 2 (400), characterized in that the noise reduction component 2 (400) is installed in the middle of the upper side of the base (100), the noise reduction component 1 (300) is installed on the upper side of the noise reduction component 2 (400), and the motor body (200) is installed inside the noise reduction component 1 (300); The noise reduction component 1 (300) includes a shell 1 (310), a shell 2 (320) and an inner lining (330), wherein the shell 2 (320) is installed on the upper side of the shell 1 (310), the shell 2 (320) is fixed to the upper side of the shell 1 (310) by bolts, and the inner lining (330) is fixed inside the shell 1 (310) and the shell 2 (320); The noise reduction component 2 (400) includes a mounting plate (410), a movable support leg (420), and a compression spring (450). A movable support leg (420) is welded to each of the four corners of the upper surface of the mounting plate (410). A movable seat (430) is movably mounted on the upper side of the mounting plate (410) via a plurality of movable support legs (420).

2. A DC motor with a noise reduction structure according to claim 1, characterized in that: Circular through holes are respectively provided on the left and right sides between the first shell (310) and the second shell (320); the left and right sides of the motor body (200) extend to the outside through the circular through holes on the left and right sides between the first shell (310) and the second shell (320); the lower end of the motor body (200) is fixedly connected to the front and rear sides of the upper end of the second shell (320).

3. A DC motor with a noise reduction structure according to claim 2, characterized in that: The inner lining (330) includes a high-density sponge pad and a sound-insulating cotton pad. The outer side of the sound-insulating cotton pad is fixedly connected to the inner side of the high-density sponge pad. The outer wall of the high-density sponge pad is connected to the inner walls of the first shell (310) and the second shell (320). The inner lining (330) is not directly connected to the outer wall of the motor body (200), and a heat dissipation gap is provided between the two.

4. The DC motor with a noise reduction structure according to claim 1, characterized in that: The second noise reduction component (400) further includes a tension spring (440), a compression spring (450), a shock-absorbing foot (460) and a mounting box (470). The lower side of each movable support foot (420) is movably connected to the upper end of a tension spring (440), and the lower end of the movable seat (430) is sleeved with a compression spring (450). A mounting box (470) is provided in the middle of the lower surface of the mounting plate (410), the lower end of the movable seat (430) passes through the mounting plate (410) downward and extends into the interior of the mounting box (470), and a shock-absorbing foot (460) is fixed to the lower surface of each of the four corners of the mounting plate (410).

5. The DC motor with a noise reduction structure according to claim 4, characterized in that: A first hanging block (411) is welded to the front side and rear side of the left end and the front side and rear side of the right end of the upper surface of the mounting plate (410), and the movable support leg (420) includes a first hinge seat (421), a hinge rod (422) and a second hanging block (423); The upper end of the hinge seat (421) is hinged to the lower end of the hinge rod (422), and a second hanging block (423) is welded in the middle of the lower surface of the hinge rod (422). The second hanging block (423) is placed on the upper side of the first hanging block (411). The upper end of the tension spring (440) is fixedly connected to the hinge rod (422) through the second hanging block (423), and the lower end of the tension spring (440) is fixedly connected to the mounting plate (410) through the first hanging block (411).

6. A DC motor with a noise reduction structure according to claim 5, characterized in that: A guide post (433) is provided in the middle of the lower end of the movable seat (430), and a circular magnetic plate (432) is fixed to the lower end of the guide post (433). A hinged seat (431) is provided on the left front side and the left rear side of the left end and the right front side and the right rear side of the right end of the movable seat (430), respectively. Each hinged seat (431) is hinged to the upper end of a hinge rod (422); The diameter of the magnetic plate (432) is larger than the diameter of the guide post (433), and a guide hole is formed downwardly through the front, rear, left and right sides of the upper surface of the magnetic plate (432), and the guide post (433) is arranged inside the compression spring (450), and the lower end of the compression spring (450) is in contact with the upper surface of the mounting plate (410), and the upper end of the compression spring (450) is in contact with the lower surface of the upper end of the movable seat (430).

7. A DC motor with a noise reduction structure according to claim 6, characterized in that: The shock-absorbing foot (460) includes a shock absorber (461), a telescopic sleeve (462), and a bottom plate (463); the upper side of the plate is fixedly connected to the lower end of the shock absorber (461); and the upper end of the shock absorber (461) is fixedly connected to the lower surface of the mounting plate (410); The shock absorber (461) is a spring damping shock absorber (461), a telescopic sleeve (462) is provided on the outer side of the shock absorber (461), and the telescopic sleeve (462) is a foldable bellows. A guide rod is welded to the front, rear, left and right sides of the lower surface of the mounting plate (410) located inside the mounting box (470); The four guide rods are respectively slidably connected to the magnetic plate (432) through a guide hole. A magnetic ring (471) is fixed in the middle of the bottom of the installation box (470). The magnetic ring (471) is fixedly connected to the lower ends of the four guide rods. The upper side of the magnetic ring (471) is an N pole, and the lower side of the magnetic plate (432) is an N pole. The diameter of the magnetic plate (432) is the same as the diameter of the magnetic ring (471).

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