CN211720380U - Novel permanent magnet brushless motor's dustproof construction - Google Patents

Abstract

The utility model discloses a novel dustproof structure of a permanent magnet brushless motor, which comprises an outer casing, a shaft seal and a heat dissipation mechanism. A shaft seal is fixedly installed on one side of the outer casing, and the outer casing is far away from the shaft seal. A heat dissipation mechanism is fixedly installed on one side of the outer casing, an output shaft is rotatably installed inside the outer casing, one end of the output shaft is arranged through the shaft sealing member, and an air inlet is opened on the side of the outer casing close to the shaft sealing member, The air inlet is embedded and fixedly installed with a dust-proof net, and the inside of the outer casing is fixedly installed with cooling fins. The structure of the utility model is simple, and the shaft seal prevents dust from entering through the gap between the output shaft and the outer casing. Grinding the sealing bushing improves the sealing performance while improving the sealing wear resistance, ensuring the service life of the shaft seal and the effectiveness of sealing and dustproofing. The heat dissipation mechanism improves the heat dissipation performance of the motor. The dustproof performance is more practical.

Description

Dust-proof structure of a new type of permanent magnet brushless motor

technical field

The utility model relates to the technical field of motors, in particular to a novel dustproof structure of a permanent magnet brushless motor.

Background technique

Permanent magnet brushless motor is a permanent magnet motor controlled by electronic circuit commutation or current. Permanent magnet brushless motor has two types of sine wave drive and square wave drive; the drive current is a rectangular wave is usually called a permanent magnet brushless DC motor, the drive current is a sine wave is usually called a permanent magnet AC servo motor. Inductive types can be divided into sensored motors and positive sensored motors.

At present, when the output shaft of the motor passes through the motor casing, the gap between the motor casing and the output shaft is easy to enter dust, especially the motor casing is seriously worn, and the gap between the output shaft and the motor casing becomes larger, and the dust intake affects the motor. service life and poor practicability.

Utility model content

The purpose of this utility model is to provide a new type of dustproof structure of permanent magnet brushless motor, so as to solve the gap between the motor casing and the output shaft when the current motor output shaft passes through the motor casing proposed in the above-mentioned background art It is easy to get dust, especially the motor casing is seriously worn, the gap between the output shaft and the motor casing becomes larger, and the dust intake affects the service life of the motor.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a novel dust-proof structure of a permanent magnet brushless motor, comprising an outer casing, a shaft seal and a heat dissipation mechanism, and a shaft seal is fixedly installed on one side of the outer casing , a heat dissipation mechanism is fixedly installed on the side of the outer casing away from the shaft seal, an output shaft is rotatably installed inside the outer casing, one end of the output shaft is arranged through the shaft seal, and the outer casing is close to the shaft seal An air inlet is opened on one side of the air inlet, a dust-proof net is embedded and fixedly installed in the air inlet, and a heat dissipation fin is fixedly installed in the inside of the outer casing.

Preferably, the shaft seal includes a sealing gasket and a wear-resistant sealing sleeve, a sealing gasket is fixedly installed on the side of the outer casing close to the output shaft by bolts, and a shaft hole is formed on the sealing gasket, and the shaft hole is fixedly installed There is a wear-resistant seal shaft sleeve, and one end of the output shaft passes through the wear-resistant seal shaft sleeve.

Preferably, the heat dissipation mechanism includes a heat dissipation back cover and blades, a heat dissipation back cover is fixedly installed on the side of the outer casing away from the shaft seal, the heat dissipation back cover is arranged in a cylindrical structure, and the heat dissipation back cover is far away from the shaft seal. A heat dissipation mesh plate is fixedly installed on the circumferential side wall of one side of the outer casing, an electric motor is fixedly installed in the side of the heat dissipation rear cover away from the outer casing, and a rotating shaft is fixedly installed on the side of the electric motor close to the outer casing, Blades are fixedly installed on the rotating shaft.

Preferably, the wear-resistant sealing shaft sleeve and the sealing gasket are both arranged in a T-shaped structure.

Preferably, a plurality of the heat dissipation fins are provided, and the plurality of the heat dissipation fins are evenly installed inside the outer casing around the circumference, and the heat dissipation fins are made of aluminum heat dissipation fins.

Preferably, the wear-resistant sealing shaft sleeve is made of PTFE material.

The utility model provides a novel dustproof structure of a permanent magnet brushless motor. Compared with the prior art, it has the following beneficial effects:

1. The dust-proof structure of the new permanent magnet brushless motor is simple in structure and easy to use. The shaft seal and gasket are provided to seal the output shaft through the outer casing to prevent dust from passing between the output shaft and the outer casing. The wear-resistant sealing sleeve is installed between the output shaft and the gasket. The wear-resistant sealing sleeve can improve the sealing performance while improving the wear resistance of the seal, ensuring the service life of the shaft seal and the sealing resistance. The effect of dust.

2. The dust-proof structure of the new permanent magnet brushless motor, through the heat dissipation mechanism and the air inlet, the electric motor drives the shaft and the blades to rotate, so that the air inside and outside the casing circulates from the air inlet to the heat dissipation screen plate, and dissipates heat. Under the action of the fins, the heat dissipation performance of the motor is effectively improved. At the same time, the dustproof net installed in the air inlet and the heat dissipation screen plate on the heat dissipation rear cover have good dustproof performance, which can prevent dust from entering during the heat dissipation process and ensure the motor longer life and more practical.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural side view of the utility model;

FIG. 3 is a schematic structural diagram of the A part of the present invention.

In the figure: 1. Outer shell; 2. Shaft seal; 21. Gasket; 22. Wear-resistant seal shaft sleeve; 23. Bolt; 3. Heat dissipation mechanism; 31. Heat dissipation rear cover; Electric motor; 34, shaft; 35, blade; 4, output shaft; 5, air inlet; 51, dust filter; 6, cooling fins.

Detailed ways

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

1-3, the present utility model provides a technical solution: a novel dustproof structure of a permanent magnet brushless motor, comprising an outer casing 1, a shaft seal 2 and a heat dissipation mechanism 3, one of the outer casings 1 A shaft seal 2 is fixedly installed on the side, a heat dissipation mechanism 3 is fixedly installed on the side of the outer casing 1 away from the shaft seal 2, an output shaft 4 is rotatably installed inside the outer casing 1, and one end of the output shaft 4 passes through. An air inlet 5 is provided on the side of the outer casing 1 close to the shaft seal 2, and the air inlet 5 is embedded and fixedly installed with a dustproof net 51, and the inner part of the outer casing 1 is fixedly installed There are cooling fins 6 .

The shaft seal 2 includes a seal 21 and a wear-resistant seal shaft sleeve 22 , a seal 21 is fixedly installed on the side of the outer casing 1 close to the output shaft 4 through bolts 23 , and a shaft hole is formed on the seal 21 . , a wear-resistant seal sleeve 22 is fixedly installed in the shaft hole, and one end of the output shaft 4 passes through the wear-resistant seal sleeve 22 to seal the output shaft 4 of the motor to prevent dust from entering. The heat dissipation mechanism 3 includes a heat dissipation mechanism. The rear cover 31 and the blades 35. The side of the outer casing 1 away from the shaft seal 2 is fixedly installed with a cooling rear cover 31, the cooling rear cover 31 is arranged in a cylindrical structure, and the cooling rear cover 31 is far away from the outer casing. A heat dissipation mesh plate 32 is fixedly and fixedly installed on the circumferential side wall of one side, and an electric motor 33 is fixedly installed on the side of the heat dissipation rear cover 31 away from the outer casing 1, and the electric motor 33 is close to the side of the outer casing 1. The rotating shaft 34 is fixedly installed, and the blade 35 is fixedly installed on the rotating shaft 34. The heat dissipation mechanism 3 makes the motor have good heat dissipation performance, and the heat dissipation mechanism 3 itself takes dust-proof measures. The pads 21 are all arranged in a T-shaped structure. The sealing pads 21 of the T-shaped structure and the wear-resistant sealing shaft sleeve 22 of the T-shaped structure are arranged in a stepped shape, and the sealing performance is better. The heat dissipation fins 6 are evenly installed inside the outer casing 1 around the circumference. The heat dissipation fins 6 are made of aluminum heat sinks, which are cost-effective. It has self-lubricating properties.

Working principle: When in use, the sealing gasket 21 is fixedly installed with one side of the outer casing 1 through the bolts 23. Since the sealing gasket 21 is provided with a shaft hole, a wear-resistant sealing sleeve 22 is fixedly installed in the shaft hole, and the output shaft 4 One end passes through the wear-resistant sealing shaft sleeve 22, and the wear-resistant sealing shaft sleeve 22 and the sealing gasket 21 are both arranged in a T-shaped structure. The sealing gasket 21 and the wear-resistant sealing shaft sleeve 22 seal the output shaft 4 through the outer casing 1 , to prevent dust from entering from the gap between the output shaft 4 and the outer casing 1, the wear-resistant seal shaft sleeve 22 improves the sealing performance while improving the wear-resistant performance of the seal, ensuring the service life of the shaft seal 2 and the sealing and dust-proof performance. In effect, the electric motor 33 rotates to drive the shaft 34 and the blades 35 to rotate, the external low-temperature air is filtered by the air inlet 5 through the dust-proof net 51 and then enters the outer casing 1, and the internal high-temperature air is discharged from the heat-dissipating mesh plate 32 on the heat-dissipating rear cover 31, To promote the air circulation in the outer casing 1 of the motor, and in the process of air circulation inside the outer casing 1, the heat dissipation fins 6 increase the effect of circulation and heat dissipation, which effectively improves the heat dissipation performance of the motor. , and the heat dissipation mesh plate 32 on the heat dissipation rear cover 31 has better dustproof performance, avoids the entry of dust during the heat dissipation process, ensures the service life of the motor, and is more practical.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", " The orientation or positional relationship indicated by "top", "inside", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description , rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implying the number of technical features indicated, Thus, features defined as "first", "second", "third", "fourth" may expressly or implicitly include at least one of such features.

In the present utility model, unless otherwise expressly specified and limited, terms such as "installation", "arrangement", "connection", "fixation", "swivel connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachable connection or integrated; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements Unless otherwise clearly defined, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A novel dustproof structure for a permanent magnet brushless motor, characterized in that it comprises an outer casing (1), a shaft seal (2) and a heat dissipation mechanism (3), and one side of the outer casing (1) is fixed A shaft seal (2) is installed, a heat dissipation mechanism (3) is fixedly installed on the side of the outer casing (1) away from the shaft seal (2), and an output shaft (4) is rotatably installed inside the outer casing (1). ), one end of the output shaft (4) is arranged through the shaft seal (2), and the side of the outer casing (1) close to the shaft seal (2) is provided with an air inlet (5), the air inlet (5) A dustproof net (51) is embedded and fixedly installed, and heat dissipation fins (6) are fixedly installed inside the outer casing (1). 2 . The dust-proof structure of a novel permanent magnet brushless motor according to claim 1 , wherein the shaft seal ( 2 ) comprises a sealing gasket ( 21 ) and a wear-resistant sealing shaft sleeve ( 22 ). 3 . A sealing gasket (21) is fixedly installed on the side of the outer casing (1) close to the output shaft (4) by means of bolts (23). The wear-resistant seal shaft sleeve (22) is worn, and one end of the output shaft (4) passes through the wear-resistant seal shaft sleeve (22). 3 . The dust-proof structure of a novel permanent magnet brushless motor according to claim 1 , wherein the heat dissipation mechanism ( 3 ) comprises a heat dissipation rear cover ( 31 ) and blades ( 35 ), and the outer casing (1) A heat-dissipating rear cover (31) is fixedly installed on the side away from the shaft seal (2). 1) A heat dissipation mesh plate (32) is fixedly installed on the circumferential side wall of one side, and an electric motor (33) is fixedly installed on the side of the heat dissipation rear cover (31) away from the outer casing (1). A rotating shaft (34) is fixedly installed on the side of the motor (33) close to the outer casing (1), and a blade (35) is fixedly installed on the rotating shaft (34). 4 . The dust-proof structure of a novel permanent magnet brushless motor according to claim 2 , wherein the wear-resistant sealing shaft sleeve ( 22 ) and the sealing gasket ( 21 ) are both arranged in a T-shaped structure. 5 . 5 . The dust-proof structure of a novel permanent magnet brushless motor according to claim 1 , characterized in that: a plurality of the heat dissipation fins ( 6 ) are provided, and the plurality of the heat dissipation fins ( 6 ) are evenly installed around the circumference. 6 . Inside the outer casing (1), the heat dissipation fins (6) are made of aluminum heat dissipation fins. 6 . The dust-proof structure of a novel permanent magnet brushless motor according to claim 4 , wherein the wear-resistant sealing shaft sleeve ( 22 ) is made of PTFE material. 7 .

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