An auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for vehicles

Abstract

The invention discloses an auxiliary slot structure for suppressing the vibration noise of a permanent magnet synchronous motor for a vehicle, comprising a slot body, a buffer component, a first noise reduction component and a second noise reduction component; the slot body: a support is fixedly connected to the lower surface thereof, a first flange is fixedly connected to the right end of the outer surface of the slot body, and a buffer pad is fixedly connected to the inner left side of the slot body; an end cover: a second flange is provided at the front end of the outer surface thereof, the second flange and the first flange are fixedly connected by bolts, a mounting hole is provided in the middle of the end cover, and a heat dissipation fan is installed inside the mounting hole; the buffer component is fixedly connected to the inner bottom surface of the slot body, and a motor is fixedly connected to the upper surface of the buffer component. The auxiliary slot structure for suppressing the vibration noise of a permanent magnet synchronous motor for a vehicle reduces the vibration of the motor, reduces the noise by multiple silencing measures, and has a significant effect, and can quickly transfer the heat on the surface of the motor, thereby improving the heat dissipation efficiency, delaying the aging of internal components, and extending the service life.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet synchronous motors, and in particular to an auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle. Background Art

[0002] The two major problems facing the sustainable development of the current automobile industry are: environmental pollution and lack of oil resources. The exhaust pollution, noise, and fire hazards of fuel storage in automobiles are attracting more and more attention. Environmental protection and energy saving are an important development direction of automobile technology in the 21st century. Electric vehicles have become a new generation of clean energy vehicles. The drive motor and transmission system are the heart of electric vehicles, and the motor is the core of the drive system. The comprehensive performance of the motor directly affects the performance of electric vehicles. At present, the drive motor for electric vehicles restricts the research and development of electric vehicles in China and its industrialization process. At present, permanent magnet DC brushless motors are being developed at home and abroad. Their armature excitation is a "non-circular jumping" rotating magnetic field, and there is a large torque fluctuation, which affects the motor's high efficiency, high precision, high speed and stable operation. However, the existing permanent magnet DC brushless motor still has a certain amount of noise during use, which affects the user experience of the car, causing users to affect the overall performance evaluation of the car during use, and then affect the market share. The commonly used method is to use sound-absorbing cotton for sound insulation and noise reduction, but the function is single, the noise reduction effect is poor, and the scope of application is narrow. To this end, we propose an auxiliary slot structure for suppressing the vibration noise of a permanent magnet synchronous motor for vehicles to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an auxiliary slot structure for suppressing the vibration noise of a permanent magnet synchronous motor for a vehicle, thereby reducing the vibration of the motor and reducing the noise through multiple silencing measures, with significant effects. The heat on the surface of the motor can be quickly transferred away, thereby improving the heat dissipation efficiency, delaying the aging of internal components, and extending the service life, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle, comprising a slot body, a buffer component, a first noise reduction component and a second noise reduction component;

[0005] Trough body: a support is fixedly connected to its lower surface, a first flange is fixedly connected to the right end of the outer surface of the trough body, and a buffer pad is fixedly connected to the inner left side of the trough body;

[0006] End cover: A second flange is provided at the front end of its outer surface, and the second flange is fixedly connected to the first flange by bolts. A mounting hole is provided in the middle of the end cover, and a heat dissipation fan is installed inside the mounting hole;

[0007] Buffer assembly: fixedly connected to the inner bottom surface of the tank body, the upper surface of the buffer assembly is fixedly connected to a motor, the output shaft of the motor passes through the buffer pad and is rotatably connected to the inner wall of the through hole set on the front side plate of the tank body;

[0008] A first noise reduction component: arranged inside a cavity arranged outside a side wall of the tank body;

[0009] A second noise reduction component is arranged inside a cavity arranged on the inner side of the side wall of the tank body;

[0010] Wherein: it also includes a control switch group, the control switch group is fixedly connected to the front side of the slot body, the input end of the control switch group is electrically connected to the external power supply, the output end of the control switch group is electrically connected to the input ends of the motor and the heat dissipation fan respectively, the rubber pad and the shock-absorbing spring reduce the frequency of motor vibration, thereby reducing the noise caused by vibration, and the vibration absorption of sound by the corrugated spring sheet is weakened, thereby further reducing the transmission of noise, the thin plate frame and the partition extend the time of sound transmission and increase the sound attenuation, thereby playing the role of silencing and noise reduction, the silencing hole can block a part of the frequency of sound, and play the role of auxiliary noise reduction, and the heat on the surface of the motor is quickly transferred out by setting the partition plate, thereby improving the heat dissipation efficiency of the motor, delaying the aging of internal components, and extending the service life.

[0011] Furthermore, the buffer assembly includes a rubber pad and a shock-absorbing spring. The rubber pad is fixedly connected to the inner bottom surface of the trough body. A cavity is provided inside the rubber pad. The two side ends of the shock-absorbing spring are respectively fixedly connected to the upper wall surface and the lower surface of the cavity of the rubber pad. The shock-absorbing spring array is distributed inside the cavity of the rubber pad to reduce the impact of vibration generated during the operation of the motor on the outside, thereby reducing noise.

[0012] Furthermore, the first noise reduction component includes a sound insulation board and corrugated spring pieces. The sound insulation board is fixedly connected to the inside of a groove arranged on the inner side of the side wall of the groove body. A vacuum chamber is arranged inside the sound insulation board. The upper and lower surfaces of the vacuum chamber of the sound insulation board are arrayed with corrugated spring pieces. The vibration of the sound wave is absorbed by the corrugated spring pieces, thereby reducing the transmission of noise.

[0013] Furthermore, the second noise reduction component includes a thin plate frame, a partition and a sound-absorbing hole. There are no less than three adjacent thin plate frames and they are sequentially socketed through the partitions arranged in an array. The outer thin plate frame is fixedly connected to the outer surface of the cavity arranged on the outer side of the trough side wall, and the inner thin plate frame is fixedly connected to the inner surface of the cavity arranged on the outer side of the trough side wall. The interior of the thin plate frame is provided with sound-absorbing holes distributed in an array to increase the reflection of sound, extend the propagation path, and attenuate the sound as much as possible, thereby achieving the purpose of sound absorption.

[0014] Furthermore, a silencer ring is provided on the front side wall of the trough body. The silencer ring is a vortex structure, and the cross section of the silencer ring is a five-pointed star structure, which increases diffuse reflection of sound and thus attenuates it.

[0015] Furthermore, it also includes a partition plate, which is an L-shaped elastic partition plate. The partition plate array is arranged on the front side surface, upper wall surface and rear wall surface of the inner wall of the trough body. The inner end of the partition plate contacts the outer surface of the motor. The partition plate transfers the heat on the surface of the motor to the part, increases the heat dissipation area, and improves the heat dissipation efficiency.

[0016] Furthermore, the front side wall of the trough body is provided with ventilation holes distributed in an array to improve heat dissipation efficiency.

[0017] Furthermore, it also includes sound-absorbing cotton, which is fixedly connected to the inner wall surface of the end cover, and the left side of the sound-absorbing cotton is in contact with the right side of the motor. The sound-absorbing cotton is a pyramid-shaped sound-absorbing cotton, which absorbs noise and further improves the noise reduction performance.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the auxiliary slot structure for suppressing the vibration noise of the automotive permanent magnet synchronous motor has the following advantages:

[0019] 1. When the motor runs at high speed, it generates vibration which is continuously transmitted outward. The rubber pad and shock-absorbing spring buffer the vibration of the motor, reduce the frequency of vibration, and thus reduce the noise caused by vibration.

[0020] 2. The noise emitted by the motor itself is transmitted to the outside through the sound insulation board. The vacuum cavity inside the sound insulation board has the effect of blocking and weakening the sound. When the sound propagates, it transmits the vibration to the corrugated spring piece, causing the corrugated spring piece to vibrate. The corrugated spring piece weakens the vibration absorption of the sound, further reducing the transmission of noise.

[0021] 3. Sound waves are constantly reflected by the grid-like cavity composed of thin plate frames and partitions, which prolongs the sound transmission path, prolongs the time of straight-line sound transmission, and increases sound attenuation, thereby playing a role in sound absorption and noise reduction. The sound absorption holes can block sounds of some frequencies and play a role in auxiliary noise reduction.

[0022] 4. The cooling fan starts to discharge the air inside the slot to the outside. The heat generated by the high-speed operation of the motor is transferred to the partition plate. The partition plate exchanges heat with the air when the air flows, thereby quickly transferring the heat on the surface of the motor, improving the heat dissipation efficiency of the motor and delaying the aging of internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the silencer ring of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the second noise reduction component of the present invention;

[0027] Figure 5 This is a schematic diagram of the enlarged structure of location A of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the partition plate of the present invention.

[0029] In the figure: 1 trough body, 101 first flange, 102 ventilation hole, 2 support, 3 end cover, 301 second flange, 302 mounting hole, 4 control switch group, 5 cooling fan, 6 buffer assembly, 61 rubber pad, 62 shock-absorbing spring, 7 first noise reduction assembly, 71 sound insulation board, 72 corrugated spring, 8 second noise reduction assembly, 81 thin plate frame, 82 partition, 83 silencer hole, 9 silencer ring, 10 buffer pad, 11 sound-absorbing cotton, 12 partition board, 13 motor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution: an auxiliary slot structure for suppressing the vibration noise of a permanent magnet synchronous motor for a vehicle, comprising a slot body 1, a buffer component 6, a first noise reduction component 7 and a second noise reduction component 8;

[0032] Trough body 1: a support 2 is fixedly connected to its lower surface, a first flange 101 is fixedly connected to the right end of the outer surface of the trough body 1, a buffer pad 10 is fixedly connected to the inner left side of the trough body 1, a silencer ring 9 is provided on the front side wall of the trough body 1, and the silencer ring 9 is a vortex structure, and the cross section of the silencer ring 9 is a five-pointed star structure, which increases the diffuse reflection of sound and attenuates it, and an array of ventilation holes 102 are provided on the front side wall of the trough body 1 to improve the heat dissipation efficiency;

[0033] End cover 3: a second flange 301 is provided at the front end of the outer surface thereof, the second flange 301 and the first flange 101 are fixedly connected by bolts, a mounting hole 302 is provided in the middle of the end cover 3, and a heat dissipation fan 5 is installed inside the mounting hole 302;

[0034] Buffer assembly 6: fixedly connected to the inner bottom surface of the tank body 1, the upper surface of the buffer assembly 6 is fixedly connected with the motor 13, the output shaft of the motor 13 passes through the buffer pad 10 and is rotatably connected to the inner wall of the through hole set in the front side plate of the tank body 1, the buffer assembly 6 includes a rubber pad 61 and a shock-absorbing spring 62, the rubber pad 61 is fixedly connected to the inner bottom surface of the tank body 1, a cavity is set inside the rubber pad 61, the two side ends of the shock-absorbing spring 62 are respectively fixedly connected to the upper wall surface and the lower surface of the cavity of the rubber pad 61, and the shock-absorbing spring 62 is distributed in the cavity of the rubber pad 61. When the motor 13 runs at a high speed, the vibration generated is continuously transmitted outward, and the rubber pad 61 and the shock-absorbing spring 62 buffer the vibration of the motor 13, thereby reducing the frequency of the vibration, thereby reducing the noise caused by the vibration;

[0035] The first noise reduction component 7 is arranged inside the cavity arranged outside the side wall of the tank body 1. The first noise reduction component 7 includes a sound insulation board 71 and a corrugated spring sheet 72. The sound insulation board 71 is fixedly connected to the inside of the groove arranged inside the side wall of the tank body 1. A vacuum cavity is arranged inside the sound insulation board 71. The upper and lower surfaces of the vacuum cavity of the sound insulation board 71 are arrayed with corrugated spring sheets 72. The noise emitted by the motor 13 passes through the sound insulation board 71 when it is transmitted to the outside. The vacuum cavity inside the sound insulation board 71 has the effect of blocking and weakening the sound. When the sound propagates, the vibration is transmitted to the corrugated spring sheet 72, causing the vibration of the corrugated spring sheet 72. The vibration absorption of the sound by the corrugated spring sheet 72 is weakened, thereby further reducing the transmission of the noise.

[0036] The second noise reduction component 8 is arranged inside the cavity arranged on the inner side of the side wall of the tank body 1. The second noise reduction component 8 includes a thin plate frame 81, a partition 82 and a sound-absorbing hole 83. There are no less than three thin plate frames 81 and adjacent thin plate frames 81 are sequentially sleeved through the partitions 82 arranged in an array. The outer thin plate frame 81 is fixedly connected to the outer surface of the cavity arranged on the outer side of the side wall of the tank body 1, and the inner thin plate frame 81 is fixedly connected to the inner surface of the cavity arranged on the outer side of the side wall of the tank body 1. The thin plate frame 81 is provided with sound-absorbing holes 83 distributed in an array inside. The sound waves are continuously reflected by the grid-like cavity formed by the thin plate frame 81 and the partition 82, which prolongs the transmission path of the sound, prolongs the time of the straight-line transmission of the sound, and increases the sound attenuation, thereby playing the role of sound absorption and noise reduction. The sound-absorbing hole 83 can block the sound of a part of the frequency, playing the role of auxiliary noise reduction;

[0037] Wherein: it also includes a partition plate 12, the partition plate 12 is an L-shaped elastic partition plate, the partition plate 12 array is arranged on the front side surface, upper wall surface and rear wall surface of the inner wall of the trough body 1, the inner end of the partition plate 12 is in contact with the outer surface of the motor 13, the cooling fan 5 is started to discharge the air inside the trough body 1 to the outside, and the heat generated by the high-speed operation of the motor 13 is transferred to the partition plate 12. The partition plate 12 exchanges heat with the air when the air flows, so as to quickly transfer the heat on the surface of the motor 13, improve the heat dissipation efficiency of the motor 13, and delay the aging of internal components.

[0038] It also includes sound-absorbing cotton 11, which is fixedly connected to the inner wall surface of the end cover 3. The left side of the sound-absorbing cotton 11 contacts the right side of the motor 13. The sound-absorbing cotton 11 is a pyramid-shaped sound-absorbing cotton, which absorbs noise and further improves the noise reduction performance.

[0039] Among them: it also includes a control switch group 4, the control switch group 4 is fixedly connected to the front side of the slot body 1, the input end of the control switch group 4 is electrically connected to the external power supply, and the output end of the control switch group 4 is electrically connected to the input end of the motor 13 and the cooling fan 5 respectively.

[0040] When in use: when the motor 13 is running at high speed, the vibration generated is continuously transmitted outward, and the rubber pad 61 and the shock absorbing spring 62 buffer the vibration of the motor 13, thereby reducing the frequency of the vibration, thereby reducing the noise caused by the vibration. When the noise generated by the motor 13 itself is transmitted to the outside, it passes through the sound insulation board 71. The vacuum chamber inside the sound insulation board 71 has the effect of blocking and weakening the sound. When the sound propagates, the vibration is transmitted to the corrugated spring piece 72, causing the vibration of the corrugated spring piece 72. The corrugated spring piece 72 absorbs and weakens the vibration of the sound, further reducing the transmission of the noise. Then, when passing through the second noise reduction component 8, the sound waves are continuously absorbed by the thin plate frame 81 and The grid-like cavity reflection formed by the partition 82 prolongs the sound transmission path, prolongs the time of straight-line sound transmission, and increases sound attenuation, thereby playing a role in sound absorption and noise reduction. The sound absorption holes 83 can block sounds of a certain frequency, thereby playing a role in auxiliary noise reduction. The control switch group 4 controls the cooling fan 5 to start, and the cooling fan 5 starts to discharge the air inside the slot body 1 to the outside. The heat generated by the high-speed operation of the motor 13 is transferred to the partition 12. The partition 12 exchanges heat with the air when the air flows, thereby quickly transferring the heat on the surface of the motor 13, improving the heat dissipation efficiency of the motor 13, and delaying the aging of internal components.

[0041] It is worth noting that the cooling fan 5 and the motor 13 disclosed in this embodiment can be freely configured according to the actual application scenario. It is recommended to use the HD3510 AC fan produced by Shenzhen Hongfei Electromechanical Technology Co., Ltd., and the control switch group 4 controls the cooling fan 5 and the motor 13 to work using the methods commonly used in the prior art.

[0042] Although 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. An auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle, characterized in that: It comprises a tank body (1), a buffer component (6), a first noise reduction component (7) and a second noise reduction component (8); The trough body (1) has a support (2) fixedly connected to its lower surface, a first flange (101) fixedly connected to the right end of the outer surface of the trough body (1), and a buffer pad (10) fixedly connected to the left inner surface of the trough body (1); The end cover (3) is provided with a second flange (301) at the front end of its outer surface, the second flange (301) and the first flange (101) are fixedly connected by bolts, a mounting hole (302) is provided in the middle of the end cover (3), and a heat dissipation fan (5) is installed inside the mounting hole (302); A buffer assembly (6) is fixedly connected to the inner bottom surface of the tank body (1); a motor (13) is fixedly connected to the upper surface of the buffer assembly (6); an output shaft of the motor (13) passes through the buffer pad (10) and is rotatably connected to the inner wall of a through hole provided on the front side plate of the tank body (1); A first noise reduction component (7) is arranged inside a cavity arranged outside a side wall of the tank body (1); A second noise reduction component (8) is arranged inside a cavity arranged on the inner side of the side wall of the tank body (1); The control switch group (4) is also included, wherein the control switch group (4) is fixedly connected to the front side of the tank body (1), the input end of the control switch group (4) is electrically connected to an external power supply, and the output end of the control switch group (4) is electrically connected to the input ends of the motor (13) and the cooling fan (5) respectively; The buffer assembly (6) comprises a rubber pad (61) and a shock absorbing spring (62), wherein the rubber pad (61) is fixedly connected to the inner bottom surface of the tank body (1), a cavity is provided inside the rubber pad (61), and the two side ends of the shock absorbing spring (62) are respectively fixedly connected to the upper wall surface and the lower surface of the cavity of the rubber pad (61), and the shock absorbing spring (62) is distributed in an array inside the cavity of the rubber pad (61); The first noise reduction component (7) comprises a sound insulation board (71) and corrugated spring sheets (72), wherein the sound insulation board (71) is fixedly connected to the inside of a groove arranged on the inner side of the side wall of the trough body (1), a vacuum cavity is arranged inside the sound insulation board (71), and the corrugated spring sheets (72) are arranged in an array on the upper surface and the lower surface of the vacuum cavity of the sound insulation board (71); The second noise reduction component (8) comprises a thin plate frame (81), a partition (82) and a sound-absorbing hole (83); the thin plate frame (81) comprises no less than three adjacent thin plate frames (81) which are connected in sequence through the partitions (82) arranged in an array; the outer thin plate frame (81) is fixedly connected to the outer surface of the cavity arranged on the outer side of the side wall of the trough body (1); the inner thin plate frame (81) is fixedly connected to the inner surface of the cavity arranged on the outer side of the side wall of the trough body (1); and the inside of the thin plate frame (81) is provided with sound-absorbing holes (83) distributed in an array.

2. The auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle according to claim 1, characterized in that: The front side wall of the trough body (1) is provided with a silencer ring (9), the silencer ring (9) is a vortex structure, and the cross section of the silencer ring (9) is a five-pointed star structure.

3. The auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle according to claim 1, characterized in that: It also includes a partition plate (12), which is an L-shaped elastic partition plate. The partition plates (12) are arranged in an array on the front side surface, the upper wall surface and the rear wall surface of the inner wall of the tank body (1), and the inner end of the partition plate (12) is in contact with the outer surface of the motor (13).

4. The auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle according to claim 1, characterized in that: The front side wall of the tank body (1) is provided with ventilation holes (102) distributed in an array.

5. The auxiliary slot structure for suppressing vibration noise of a permanent magnet synchronous motor for a vehicle according to claim 1, characterized in that: It also includes sound-absorbing cotton (11), which is fixedly connected to the inner wall surface of the end cover (3), the left side surface of the sound-absorbing cotton (11) is in contact with the right side surface of the motor (13), and the sound-absorbing cotton (11) is a pyramid-shaped sound-absorbing cotton.

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