CN111963492A - An electric vehicle noise reduction device - Google Patents

Abstract

The invention discloses a noise reduction device of an electric automobile, which comprises a motor and a noise reduction device; the motor is fixedly connected with the noise reduction device; the noise reduction device comprises a fan, an air inlet device, an air outlet device and a cover body; an air inlet device and an air outlet device are respectively arranged on two sides of the cover body, and the air inlet device corresponds to the air outlet device in position; the air inlet device comprises a substrate, a first fixing ring, a first noise reduction groove, a second noise reduction groove, an air inlet, a connecting flange, a reinforcing rib, a shaft sleeve and a flange through hole; the invention greatly reduces the rotating noise of the motor, and the device has simple structure, obvious effect and strong practicability; the vibration generated when the motor works can be absorbed, the working stability of the motor is improved, and the noise generated by the fan is reduced.

Description

An electric vehicle noise reduction device

technical field

The invention relates to the technical field of noise reduction, in particular to a noise reduction device for an electric vehicle.

Background technique

Electric vehicles are mainly driven by motors, and the electric vehicle fan assembly is used to provide a larger amount of cold air exchange for the heat exchange of heat exchangers such as automobile radiators, condensers, intercoolers, and oil coolers, so as to change the engine compartment. heat flow field. Existing automobile fans are generally of the piggyback type, which are mounted on the water chamber bracket of the radiator assembly through four-point installation. When in use, the motor drives the fan blades to rotate to achieve heat dissipation. The operation of the motor will generate a large amount of jitter, and under the action of the above jitter, a lot of noise will be generated, which will affect the driving experience.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a noise reduction device for electric vehicles, to solve the problems existing in the above-mentioned prior art, to achieve stable operation of the hoisting motor, simple structure, simple installation, and can greatly reduce the work of the motor and the work of the fan itself noise.

In order to achieve the above purpose, the present invention provides the following solutions: the present invention provides a noise reduction device for an electric vehicle, comprising:

a motor and a noise reduction device; the motor is fixedly connected to the noise reduction device;

The noise reduction device includes a fan, an air inlet device, an air outlet device and a cover body; the two sides of the cover body are respectively provided with the air inlet device and the air outlet device, and the positions of the air inlet device and the air outlet device are correspond;

The air inlet device includes a base plate, a first fixing ring, a first noise reduction groove, a second noise reduction groove and an air inlet; the base plate is fixedly arranged in the center of one side of the cover body; the inner wall of the base plate is along the central axis The air inlet is opened in the direction; the first fixing ring is arranged along the outer edge of the air inlet;

Preferably, the base plate is arranged on the cover to stabilize the connection structure with the motor, make the connection between the shaft sleeve and the motor more stable, and reduce the noise generated by the shaking of the air inlet device when the motor rotates.

The inner wall of the base plate is also provided with the first noise reduction groove and the second noise reduction groove; the first noise reduction groove and the second noise reduction groove are provided with a plurality of them and are arranged axially along the center of the base plate; The second noise reduction grooves are disposed outside the first noise reduction grooves, and the number of the second noise reduction grooves is greater than that of the first noise reduction grooves.

Preferably, when the motor is running at a high speed, the swirling airflow preferentially enters the air inlet from the outside to the inside, and at this time, it will first impact the first noise reduction slot and the second noise reduction slot; The number of the second noise reduction grooves is more than that of the first noise reduction grooves on the inner side, so that they can be used reasonably and reduce the noise of motor rotation; the setting structure is simple, the effect is obvious, and the practicability is strong.

The air outlet device includes an outer ring, a first connecting rib, a second connecting rib, an air outlet, a second fixing ring and a rubber ring; The positions of the tuyere correspond to each other; the outer ring is fixedly connected to the cover body through the first connecting rib and the second connecting rib; the first connecting rib and the second connecting rib are arranged circumferentially at intervals along the center of the outer ring;

Furthermore, the first connecting rib is a straight rib structure, the second connecting rib is an arc rib structure, and the first connecting rib and the second connecting rib are arranged in an intersecting manner to further enhance the structural stability.

The outer ring is provided with a second fixing ring; the second fixing ring is opposite to the outer ring and is fixedly connected, and the outer peripheral surface of the outer ring and the inner peripheral surface of the second fixing ring form a gap The rubber ring is arranged in the middle.

Preferably, the rubber ring is arranged in the gap formed between the outer peripheral surface of the outer ring and the inner peripheral surface of the second fixing ring, so as to better absorb the vibration generated when the motor works through the elastic deformation of the rubber ring, and can The installation strength of the air outlet device is improved, the working stability of the motor can be improved, and the vibration of the fan itself can be reduced.

The second fixing ring is formed with a fixing pipe along the direction of the air inlet; the fixing pipe is parallel to the outer ring and is provided with at least one; the rubber ring is provided with a fixing hole adapted to the fixing pipe .

Further, a pressure ring facing the rubber ring can be provided at one end of the rubber ring, and the bolts can be fixed through the pressure ring and the fixing pipe; The contact area between the rubber ring and the outer ring further reduces noise.

The air inlet device is also provided with a connecting flange and a shaft sleeve; the connecting flange is provided with at least one and is arranged on the outer side wall of the base plate; the shaft sleeve is fixedly arranged on the edge of the inner side wall of the base plate, and is fixedly connected with the output shaft of the motor.

The connecting flange is provided with a flange through hole; the base plate and the cover body are threadedly connected through the flange through hole.

The air inlet hood is further provided with a reinforcing rib; at least one reinforcing rib is provided, which is fixedly arranged along the circumferential direction of the outer side wall of the first fixing ring; and the bottom end of the reinforcing rib is fixedly connected with the surface of the base plate.

The cover body has a square structure.

The first noise reduction groove and the second noise reduction groove are both regular hexagonal structures.

Preferably, the regular hexagonal structure is more stable and the noise reduction effect is better.

At least one crushing groove is opened on the side wall of the rubber ring.

Preferably, the rubber ring can be more easily deformed, so that the effect of reducing fan noise is more stable.

The present invention discloses the following technical effects: the present invention greatly reduces the noise of motor rotation by setting noise reduction grooves, and the device has a simple structure, obvious effect and strong practicability; it is also arranged between the outer ring and the second fixing ring The rubber ring can absorb the vibration generated by the motor during operation, improve the stability of the motor operation, and reduce the noise generated by the fan itself.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

FIG. 1 is a schematic structural diagram of an air inlet device of the present invention.

FIG. 2 is a schematic structural diagram of an air outlet device of the present invention.

3 is a schematic diagram of the connection structure of the outer ring, the fixing ring and the rubber ring of the present invention.

Among them, 1- air inlet device, 2- air outlet device, 3- cover body, 11- base plate, 12- first fixing ring, 13- first noise reduction groove, 14- second noise reduction groove, 15- air inlet , 16-connecting flange, 17-reinforcing rib, 18-shaft sleeve, 19-flange through hole, 21-outer ring, 22-first connecting rib, 23-second connecting rib, 24-air outlet, 25- The second fixing ring, 26-rubber ring, 27-fixing pipe.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The present invention provides a noise reduction device for an electric vehicle, comprising:

Motor and noise reduction device; fixed connection between motor and noise reduction device;

The noise reduction device includes a fan, an air inlet device 1, an air outlet device 2 and a cover body 3; the two sides of the cover body 3 are respectively provided with an air inlet device 1 and an air outlet device 2, and the air inlet device 1 and the air outlet device 2 are located at the positions correspond;

The air inlet device 1 includes a base plate 11, a first fixing ring 12, a first noise reduction groove 13, a second noise reduction groove 14 and an air inlet 15; the base plate 11 is fixedly arranged at the center of one side of the cover body 3; An air inlet 15 is opened in the axial direction; a first fixing ring 12 is arranged along the outer edge of the air inlet 15;

The inner wall of the base plate 11 is also provided with a first noise reduction groove 13 and a second noise reduction groove 14; the first noise reduction grooves 13 and the second noise reduction grooves 14 are provided with a plurality of them and are arranged along the central axis of the base plate 1; The noise reduction grooves 14 are disposed outside the first noise reduction grooves 13 , and the number of the second noise reduction grooves 14 is greater than that of the first noise reduction grooves 13 .

The air outlet device 2 includes an outer ring 21, a first connecting rib 22, a second connecting rib 23, an air outlet 24, a second fixing ring 25 and a rubber ring 26; The positions of the air inlets 15 correspond to each other; the outer ring 21 is fixedly connected to the cover body 3 through the first connecting rib 22 and the second connecting rib 23;

The outer ring 21 is provided with a second fixing ring 22; the second fixing ring 22 is opposite to the outer ring 21 and is fixedly connected, and the outer peripheral surface of the outer ring 21 and the inner peripheral surface of the second fixing ring 22 form a gap with a rubber provided. Circle 26.

The second fixing ring 22 is formed with a fixing pipe 27 along the direction of the air inlet 24 ; the fixing pipe 27 is parallel to the outer ring 21 and is provided with at least one;

The air inlet device 1 is also provided with a connecting flange 16 and a shaft sleeve 18; at least one connecting flange 16 is provided, and is arranged on the outer side wall of the base plate 11; the shaft sleeve 18 is fixedly arranged on the edge of the inner side wall of the base plate 11, and is connected with the motor The output shaft is fixedly connected.

The connecting flange 16 is provided with a flange through hole 19 ; the base plate 11 and the cover body 3 are threadedly connected through the flange through hole 19 .

The air inlet hood 1 is also provided with a reinforcing rib 17 ; at least one reinforcing rib 17 is provided, and is fixedly arranged along the circumference of the outer side wall of the first fixing ring 12 ;

The cover body 3 has a square structure.

The first noise reduction groove 13 and the second noise reduction groove 14 are both regular hexagonal structures.

At least one crushing groove is formed on the side wall of the rubber ring 26 .

The invention discloses the following technical effects: the invention greatly reduces the noise of the motor rotation by setting the noise reduction groove, and the device has a simple structure, obvious effect and strong practicability; it is also arranged between the outer ring and the second fixing ring. The rubber ring can absorb the vibration generated by the motor during operation, improve the stability of the motor operation, and reduce the noise generated by the fan itself.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The above-mentioned embodiments are only to describe the preferred mode of the present invention, but not to limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (9)

1. an electric vehicle noise reduction device, is characterized in that, comprises: a motor and a noise reduction device; the motor is fixedly connected to the noise reduction device; The noise reduction device comprises a fan, an air inlet device (1), an air outlet device (2) and a cover body (3); the two sides of the cover body (3) are respectively provided with the air inlet devices (1) and an air outlet device (2), and the positions of the air inlet device (1) and the air outlet device (2) correspond to each other; The air inlet device (1) comprises a base plate (11), a first fixing ring (12), a first noise reduction groove (13), a second noise reduction groove (14) and an air inlet (15); the base plate ( 11) It is fixedly arranged in the center of one side of the cover body (3); the inner wall of the base plate (11) is provided with the air inlet (15) along the direction of the central axis; the first fixing ring (12); The first noise reduction groove (13) and the second noise reduction groove (14) are further opened on the inner wall of the base plate (11); the first noise reduction groove (13) and the second noise reduction groove (14) are both Several are provided and arranged along the central axis of the base plate (1); the second noise reduction groove (14) is arranged outside the first noise reduction groove (13), and the second noise reduction groove ( The number of 14) is not less than the first noise reduction groove (13). 2 . The noise reduction device for electric vehicles according to claim 1 , wherein the air outlet device ( 2 ) comprises an outer ring ( 21 ), a first connecting rib ( 22 ), and a second connecting rib ( 23 ). 3 . ), the air outlet (24), the second fixing ring (25) and the rubber ring (26); the air outlet (24) is opened in the center of the other side of the cover body (3), and is connected with the air inlet ( 15) The positions correspond; the outer ring (21) is fixedly connected to the cover body (3) through the first connecting rib (22) and the second connecting rib (23); the first connecting rib (22) and the second connecting ribs (23) are arranged at intervals in the circumferential direction along the center of the outer ring (21); The outer ring (21) is provided with a second fixing ring (22); the second fixing ring (22) is directly opposite to the outer ring (21) and is fixedly connected, and the outer ring (21) is The rubber ring (26) is arranged in a gap formed between the outer peripheral surface and the inner peripheral surface of the second fixing ring (22). 3 . The noise reduction device for electric vehicles according to claim 2 , wherein: the second fixing ring ( 22 ) is formed with a fixing duct ( 27 ) along the direction of the air inlet ( 24 ); The pipe (27) is parallel to the outer ring (21), and is provided with at least one; the rubber ring (26) is provided with a fixing hole adapted to the fixing pipe (27); and bolts are arranged on the fixing pipe (27). inside the pipe (27). 4. A noise reduction device for an electric vehicle according to claim 1, characterized in that: the air inlet device (1) is further provided with a connecting flange (16) and a shaft sleeve (18); the connecting flange (16) at least one is provided on the outer side wall of the base plate (11); the bushing (18) is fixedly arranged on the edge of the inner side wall of the base plate (11), and is connected with the output shaft of the motor Fixed connection. 5 . The noise reduction device for electric vehicles according to claim 4 , wherein: the connecting flange ( 16 ) is provided with a flange through hole ( 19 ); the base plate ( 11 ) and the cover The body (3) is screwed through the flange through hole (19). 6. A noise reduction device for an electric vehicle according to claim 1, characterized in that: the air inlet hood (1) is further provided with a reinforcing rib (17); the reinforcing rib (17) is provided with at least one, It is fixedly arranged along the outer side wall of the first fixing ring (12) in the circumferential direction; and the bottom end of the reinforcing rib (17) is fixedly connected with the surface of the base plate (11). 7 . The noise reduction device for electric vehicles according to claim 1 , wherein the cover body ( 3 ) has a square structure. 8 . 8 . The noise reduction device of an electric vehicle according to claim 1 , wherein the first noise reduction groove ( 13 ) and the second noise reduction groove ( 14 ) are both regular hexagonal structures. 9 . 9 . The noise reduction device for electric vehicles according to claim 2 , wherein at least one crushing groove is formed on the side wall of the rubber ring ( 26 ). 10 .

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