CN104279185A - Impeller - Google Patents

Abstract

The invention discloses an impeller, which is applied to a motor of a brushless vacuum cleaner. The impeller includes a lower cover plate. The center of the lower cover plate gradually protrudes upwards. The upper and lower surfaces of the lower cover plate form arc surfaces. on the upper surface of the lower cover. The impeller only includes a lower cover plate and a plurality of arc-shaped blades on it to form a semi-open impeller. The impeller is relatively small in size and convenient to carry; less material is used and the production cost is lower. The center of the lower cover plate protrudes upwards to form an arc surface. When the coverage area of the lower cover plate remains unchanged, the length of the blade increases significantly, making the structure of the impeller more compact, effectively reducing the volume of the impeller, and when the motor is running at high speed The blades will not be deformed or broken, which improves the service life of the impeller. The blade is integrally formed with the lower cover plate and the central shaft, which has high structural strength and good performance, avoids loose damage between the cover plate and the blade, and improves the service life of the impeller.

Description

an impeller

technical field

The invention belongs to the technical field of production and manufacture of vacuum cleaner motors, and in particular relates to an impeller.

Background technique

The vacuum cleaner is a cleaning appliance that uses a motor to drive the blades to rotate at high speed, and generates air negative pressure in the sealed housing, thereby sucking dust into the dust bag. Vacuum cleaners can generally be divided into vertical, horizontal and portable according to their structural composition.

The vacuum cleaner motor is the core component of the vacuum cleaner. It generally consists of two parts, the motor part and the fan part. Because the vacuum cleaner motor has high requirements on the speed, usually at 20,000-30,000 revolutions per minute, the conventional vacuum cleaner motor generally uses a series-excited vacuum cleaner motor. and small DC vacuum cleaner motors. Both the series-excited vacuum cleaner motor and the small DC vacuum cleaner motor belong to the brush motor, and its speed is between 20,000-40,000. Although the speed can meet the requirements of the vacuum cleaner motor, the brush motor has a large volume, a large motor fan, and a large load. Noise is high.

The impeller of the traditional series vacuum cleaner motor is made of aluminum, which is a closed impeller structure, usually including the upper cover, the lower cover, and the blades arranged between the upper and lower cover. The materials are all made of aluminum alloy. The working efficiency of the impeller is high, but it is difficult to manufacture, and the upper and lower cover plates of the aluminum impeller are assembled with the blades, the structure is complicated, the upper and lower cover plates are easy to loosen and damage, and generally the volume is large and the quality is heavy. The production cost is high, and the noise is high during operation. Compared with the closed impeller, the semi-open impeller and the open impeller have relatively small volume, but their work efficiency is low.

Moreover, generally the upper and lower cover plates are of flat plate structure, and the blades are evenly distributed between the upper and lower cover plates. In order to increase the working efficiency of the impeller, the length of the blades must be increased, so that the area of the upper and lower cover plates needs to be enlarged, resulting in the Overall volume increases.

With the development of the electrical industry, vacuum cleaner motors are gradually developing towards high performance, high efficiency, and miniaturization. Brushless DC motors are recognized in the industry for their advantages of small size, low noise, high efficiency, good reliability, and strong adaptability. more and more widely used.

In order to reduce the overall volume of the vacuum cleaner, it is generally driven by a brushless motor. In order to meet the use requirements of the brushless motor, the impeller structure generally needs to be made smaller. The traditional aluminum closed impeller is no longer suitable for the brushless motor, and the traditional The performance of the impeller structure is low, the energy consumption is large, and the use cost is high.

Therefore, in view of the above problems, it is necessary to propose a new type of impeller structure to meet the needs of the brushless motor impeller, while ensuring the high speed of the motor, reduce the volume of the motor, facilitate portability, improve the performance of the motor, and reduce energy consumption. Reduce power consumption, reduce working noise, and improve environmental quality.

Contents of the invention

In view of this, the present invention provides an impeller, including an integrally formed lower cover plate and blades, the center of the lower cover plate protrudes upwards to form an arc surface, and the length of the blades increases significantly when the coverage area of the lower cover plate remains unchanged. , so that the structure of the impeller is relatively compact to meet the needs of the brushless motor impeller. While ensuring the high speed of the motor, the volume of the motor is reduced, it is easy to carry, the performance of the motor is improved, the energy consumption is reduced, the working noise is reduced, and the Environmental Quality.

According to the object of the present invention, an impeller is proposed, which is applied to a motor of a brushless vacuum cleaner. The lower cover plate of the impeller is designed as a structure with an arc surface at the center, and a plurality of arc blades are designed on the arc surface.

Preferably, the center of the lower cover plate of the impeller protrudes upward gradually, the upper and lower surfaces of the lower cover plate form arc surfaces, and the blades are fixedly arranged on the upper surface of the lower cover plate.

Preferably, the impeller further includes a central shaft, the central shaft is provided with a shaft hole, and the lower cover plate is centered on the central shaft and fixedly connected to the outer wall of the central shaft.

Preferably, the lower cover plate is connected to a middle position of the outer wall of the central shaft.

Preferably, the blades are distributed in an array around the central axis, and extend from the outer wall of the central axis to the edge of the lower cover.

Preferably, the blades, the lower cover plate and the central shaft are integrally formed.

Preferably, the tops of the blades are rounded.

Preferably, an impeller cover is arranged above the blades, an air inlet is opened at the center of the impeller cover, and the blades are in clearance fit with the impeller cover.

Preferably, the inner side of the impeller cover opposite to the blade is recessed toward the center to form an arc surface, and the arc surface formed by the outer edge of the blade after rotation is parallel to the arc surface inside the impeller cover, when the impeller After the shroud is fitted over the blade, the impeller shroud is clearance fit with the blade.

Compared with the prior art, the advantages of the impeller disclosed in the present invention are:

1. The impeller is suitable for high-vacuum, high-speed brushless DC vacuum cleaner motors.

2. The impeller only includes the lower cover plate and multiple arc-shaped blades on it, forming a semi-open impeller. The impeller is relatively small in size and easy to carry; less material is used and the production cost is lower. The center of the lower cover plate protrudes upwards to form an arc surface. When the coverage area of the lower cover plate remains unchanged, the length of the blade increases significantly, making the structure of the impeller more compact, effectively reducing the volume of the impeller, and when the motor is running at high speed The blades will not be deformed or broken, which improves the service life of the impeller.

3. There is an impeller cover above the blade, and the blade and the impeller cover are in clearance fit. The impeller cover also acts as an upper cover in this structure, and forms a closed impeller structure with the lower cover and the blades, which reduces the size of the motor. At the same time, it ensures the working efficiency of the impeller and meets the needs of the motor with small size and high speed.

4. The blades are integrally formed with the lower cover plate and the central shaft, with high structural strength and good performance, avoiding loose damage between the cover plate and the blades, and improving the service life of the impeller.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of an impeller disclosed in the present invention.

Fig. 2 is a sectional view of an impeller disclosed in the present invention.

Figure 3 is a schematic diagram of the gap between the blade and the impeller cover.

Figure 4 is an exploded view of the impeller.

The names of the corresponding parts represented by numbers or letters in the figure:

1. Lower cover plate 2, blade 3, impeller cover 4, air inlet 5, protrusion 6, arc surface 7, central shaft 8, shaft hole

Detailed ways

The impeller of the traditional vacuum cleaner motor is made of aluminum, which is a closed impeller structure, usually including an upper cover, a lower cover, and blades arranged between the upper and lower covers. The closed impeller has a higher working efficiency, but It is difficult to manufacture, and the upper and lower cover plates and blades of the aluminum impeller are assembled, the structure is complex, the upper and lower cover plates are easy to loosen and damage, and generally the volume is large, the quality is heavy, the production cost is high, and the noise during operation larger. Moreover, generally the upper and lower cover plates are of flat plate structure, and the blades are evenly distributed between the upper and lower cover plates. In order to increase the working efficiency of the impeller, the length of the blades must be increased, so that the area of the upper and lower cover plates needs to be enlarged, resulting in the Overall volume increases.

Aiming at the deficiencies in the prior art, the present invention provides an impeller, which includes an integrally formed lower cover plate and blades, the center of the lower cover plate protrudes upwards to form an arc surface, and the blades The length of the motor is significantly increased, making the structure of the impeller more compact to meet the needs of the use of the brushless motor impeller. While ensuring the high speed of the motor, the volume of the motor is reduced, it is easy to carry, the performance of the motor is improved, and the energy consumption is reduced. Work noise, improve environmental quality.

An impeller proposed according to the object of the present invention is applied to a motor of a brushless vacuum cleaner. The lower cover plate of the impeller is designed as a structure with an arc surface at the center, and a plurality of arc blades are designed on the arc surface.

Preferably, the center of the lower cover plate of the impeller protrudes upward gradually, the upper and lower surfaces of the lower cover plate form arc surfaces, and the blades are fixedly arranged on the upper surface of the lower cover plate.

Preferably, the impeller further includes a central shaft, the central shaft is provided with a shaft hole, and the lower cover plate is centered on the central shaft and fixedly connected to the outer wall of the central shaft.

Preferably, the lower cover plate is connected to a middle position of the outer wall of the central shaft.

Preferably, the blades are distributed in an array around the central axis, and extend from the outer wall of the central axis to the edge of the lower cover.

Preferably, the blades, the lower cover plate and the central shaft are integrally formed.

Preferably, the tops of the blades are rounded.

Preferably, an impeller cover is arranged above the blades, an air inlet is opened at the center of the impeller cover, and the blades are in clearance fit with the impeller cover.

Preferably, the inner side of the impeller cover opposite to the blade is recessed toward the center to form an arc surface, and the arc surface formed by the outer edge of the blade after rotation is parallel to the arc surface inside the impeller cover, when the impeller After the shroud is fitted over the blade, the impeller shroud is clearance fit with the blade.

The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to FIG. 1 and FIG. 2 together. As shown in the figure, an impeller is applied to a motor of a brushless vacuum cleaner. The impeller includes a lower cover 1 on which a plurality of arc-shaped blades 2 are arranged. The center of the lower cover plate 1 of the impeller gradually forms a protrusion 5 upwards, the upper and lower surfaces of the lower cover plate 1 form arc surfaces 6, and the blades are fixedly arranged on the upper surface of the lower cover plate 1 . By protruding the center of the lower cover plate 1 upward to form an arc surface 6, the length of the blade 2 is significantly increased when the coverage area of the lower cover plate 1 remains unchanged, making the structure of the impeller more compact and effectively reducing the volume of the impeller , and the blade 2 will not be deformed or broken when the motor is running at high speed, which improves the service life of the impeller.

The impeller also includes a central shaft 7 on which a shaft hole 8 is arranged. The lower cover plate 1 is centered on the central shaft 7 and is fixedly connected to the outer wall of the central shaft 7 . The blades 2 are distributed in an array around the central axis 7 and extend from the outer wall of the central axis 7 to the edge of the lower cover plate 1 .

By setting the central shaft 7, and fixing the lower cover plate 1 and the blade 2 with the central shaft 7 as the reference, the structural strength and stability of the impeller are improved. Strength, to achieve the stability of the impeller operation.

The lower cover plate 1 is connected to the middle position of the outer wall of the central shaft 7, and the blades 2, the lower cover plate 1 and the central shaft 7 are integrally formed. The traditional impeller needs to stamp the upper and lower cover plates and blades first, and then assemble it. The process is complicated and the efficiency is low. The invention adopts the injection molding method to integrally form the impeller, which is convenient for production and processing, high in production efficiency, and the structural strength of the impeller better.

The top of blade 2 is rounded. By rounding the intersection of the two surfaces of the blade 2, the blade 2 as a whole has a streamlined structure, the air intake is smooth, and the work efficiency is high. At the same time, it can reduce the accumulation of dust, ensure the cleanliness inside the impeller, and improve the service life of the impeller.

Please refer to FIG. 3 and FIG. 4 , as shown in the figures, an impeller cover 3 is arranged above the blade 2 , and an air inlet 4 is opened at the center of the impeller cover 3 , and the blade 2 and the impeller cover 3 are in clearance fit. When the impeller is working, the external air flows into the impeller through the air inlet 4, and then enters the rear end of the impeller to cool the motor circuit board and winding.

The inner side of the impeller cover 3 opposite to the blade 2 is concaved toward the center to form an arc surface 6. After the blade 2 rotates, the arc surface formed by the outer edge is parallel to the arc surface 6 inside the impeller cover. When the impeller cover 3 is assembled on the top of the blade 2 , The impeller cover 3 and the blade 2 form a clearance fit.

The impeller cover 3 also plays the role of the upper cover in this structure. It forms a closed impeller structure with the lower cover 1 and the blades 2. While reducing the volume of the motor, it also ensures the working efficiency of the impeller and meets the needs of the motor. Small size, high speed requirements.

The invention discloses an impeller, which is applied to a motor of a brushless vacuum cleaner. The impeller includes a lower cover plate, the center of the lower cover plate protrudes upward gradually, the upper and lower surfaces of the lower cover plate form arc surfaces, and the blades are fixedly arranged on the on the upper surface of the lower cover. The impeller only includes a lower cover plate and a plurality of arc-shaped blades on it to form a semi-open impeller. The impeller is relatively small in size and convenient to carry; less material is used and the production cost is lower. The center of the lower cover plate protrudes upwards to form an arc surface. When the coverage area of the lower cover plate remains unchanged, the length of the blade increases significantly, making the structure of the impeller more compact, effectively reducing the volume of the impeller, and when the motor is running at high speed The blades will not be deformed or broken, which improves the service life of the impeller.

There is an impeller cover above the blade, and the blade and the impeller cover are in clearance fit. The impeller cover also acts as an upper cover in this structure, and forms a closed impeller structure with the lower cover and the blades, which reduces the volume of the motor. At the same time, it ensures the working efficiency of the impeller and meets the needs of the motor with small volume and high speed.

The blade is integrally formed with the lower cover plate and the central shaft, which has high structural strength and good performance, avoids loose damage between the cover plate and the blade, and improves the service life of the impeller.

The impeller is suitable for high-vacuum, high-speed brushless DC vacuum cleaner motors.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An impeller, which is applied to a brushless vacuum cleaner motor, is characterized in that the lower cover plate of the impeller is designed as a structure with an arc surface at the center, and a plurality of arc blades are designed on the arc surface. 2. The impeller according to claim 1, wherein the center of the lower cover plate of the impeller gradually protrudes upwards, the upper and lower surfaces of the lower cover plate form arc surfaces, and the blades are fixedly arranged on on the upper surface of the lower cover. 3. The impeller according to claim 2, characterized in that, the impeller further comprises a central shaft, the central shaft is provided with a shaft hole, and the lower cover plate is centered on the central shaft and is fixedly connected to on the outer wall of the central axis. 4. The impeller according to claim 3, wherein the lower cover plate is connected to a middle position of the outer wall of the central shaft. 5 . The impeller according to claim 3 , wherein the blades are arranged in an array around the central axis, and extend from the outer wall of the central axis to the edge of the lower cover plate. 6. The impeller according to claim 3, wherein the blade, the lower cover plate and the central shaft are integrally formed. 7. The impeller according to claim 1, wherein the tops of the blades are rounded. 8 . The impeller according to claim 2 , wherein an impeller cover is arranged above the blades, an air inlet is opened at the center of the impeller cover, and the blades are in clearance fit with the impeller cover. 9 . 9. The impeller according to claim 8, characterized in that, the inner side of the impeller cover opposite to the blade is concaved toward the center to form an arc surface, and the arc surface formed by the outer edge of the blade after rotation is in line with the impeller The arc surface inside the cover is matched in parallel, and when the impeller cover is assembled above the blade, the impeller cover and the blade form a clearance fit.