Motor fan blade, motor and electric tool

Abstract

The utility model provides a motor fan blade, a motor and an electric tool, the motor fan blade comprises a fan blade disc, the middle of which is provided with a shaft hole; the multiple fan blades are spirally arranged on the fan blade discs in the first direction, the multiple fan blade discs are evenly distributed on the fan blade discs, each fan blade comprises a tail end close to the outer edge of the corresponding fan blade disc and a front end close to the corresponding shaft hole, and in the spiral direction of the fan blades, the tail end of each fan blade is close to the outer edge of the corresponding fan blade disc, and the front end of each fan blade is close to the corresponding shaft hole. And the thickness of the fan blade is gradually increased from the front end and the tail end to the middle. The fan blade is of a structure with the thick middle and the two thin ends, the strength of the blade is improved, the fan blade can bear high rotating speed, the included angle between the tail end of the fan blade and the fan blade disc, the included angle at the air inlet position of the fan blade and the size of the fan blade are reasonably designed, so that a cavity flow field is smoother, efficiency is improved, and under the same performance, the size is smaller, and cost is reduced. The noise is lower, and the purposes of high performance, miniaturization, light weight and low noise of the motor are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a motor fan blade, a motor and an electric tool. Background Art

[0002] With the rapid development of small household appliances technology and the continuous improvement of people's living standards, vacuum cleaners have become one of the essential appliances in people's daily lives. Among them, handheld vacuum cleaners are popular because of their convenient cleaning, small space occupation and wide application. Among them, the impeller is an important component of the motor. It is driven by the motor matched with it to rotate the impeller at high speed. Most existing motors use centrifugal impellers to generate airflow. Under the same performance, this impeller has a larger volume, cannot withstand high speeds, and the impeller processing precision is not high. It is easy to generate vibration, loud noise and other adverse effects. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a motor fan blade, a motor and an electric tool to solve the problems of the existing motor using a centrifugal impeller, which leads to a larger volume under the same performance, cannot withstand very high speeds, has low impeller processing precision, is prone to vibration, and is noisy.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a motor fan blade, comprising:

[0005] A fan blade disc, wherein a shaft hole is provided in the middle of the fan blade disc;

[0006] Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

[0007] In one embodiment of the present invention, the wind blade has an arc-shaped structure, and the two sides of the wind blade along the first direction are the inner side and the outer side of the arc-shaped structure respectively, and at the same position, the arc radius of the inner side is greater than the arc radius of the outer side.

[0008] In one embodiment of the present invention, a tangent line of the outer edge of the impeller disc at the tail end of the impeller blade is arranged obliquely to the tail end of the impeller blade.

[0009] In one embodiment of the present invention, along the second direction, the angle between the tangent and the tail end of the wind blade is between 98° and 105°, wherein the first direction is one of clockwise and counterclockwise, and the second direction is opposite to the first direction.

[0010] In one embodiment of the present invention, the front end of the wind blade and the axis of the wind blade disk form an angle of 75° to 85°.

[0011] In one embodiment of the present invention, along the axial direction of the impeller disc, the angle between the tail end of the impeller blade and the outer edge of the impeller disc is between 140° and 160°.

[0012] In one embodiment of the present invention, the maximum outer diameter of the wind blade is greater than the outer diameter of the wind blade disk.

[0013] In one embodiment of the present invention, the maximum outer diameter of the tail end of the wind blade is 1.05 to 1.15 times the minimum outer diameter.

[0014] The utility model also provides a motor, comprising a housing, a stator assembly and a rotor assembly arranged in the housing, and

[0015] A motor fan blade, the motor fan blade is connected to the rotating shaft of the rotor assembly, and the motor fan blade includes: a fan blade disk, and a shaft hole is provided in the middle of the fan blade disk;

[0016] Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

[0017] The utility model also provides an electric tool, comprising a motor, wherein the motor comprises a housing, a stator assembly and a rotor assembly arranged in the housing, and

[0018] A motor fan blade, the motor fan blade is connected to the rotating shaft of the rotor assembly, and the motor fan blade includes: a fan blade disk, and a shaft hole is provided in the middle of the fan blade disk;

[0019] Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

[0020] In one embodiment of the present invention, the electric tool is a vacuum cleaner, a hair dryer, a pruner and a chain saw.

[0021] The utility model proposes a motor fan blade, a motor and an electric tool, which are designed as a turbine fan blade structure. The fan blade has a structure that is thick in the middle and thin at both ends, which increases the strength of the blade and enables it to withstand a higher rotation speed. By reasonably designing the angle between the tail end of the fan blade and the fan disk, the angle at the wind inlet of the fan blade, and the size of the fan blade, the cavity flow field is smoother and the efficiency is improved. Under the same performance, the volume is smaller and the noise is lower, thereby achieving the goals of high performance, miniaturization, lightweight and low noise of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative work.

[0023] Figure 1 This is a schematic diagram of the shaft side structure of the motor fan in one embodiment of the present invention.

[0024] Figure 2 This is a schematic front view of a motor fan in one embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the motor-fan included angle α in one embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the included angle β of the motor fan in one embodiment of the present invention.

[0027] Figure 5 This is a schematic structural diagram of the motor fan at another angle in one embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the included angle γ of the motor fan in one embodiment of the present invention.

[0029] Figure 7 This is a schematic structural diagram of a motor in one embodiment of the present invention.

[0030] Figure 8 Schematic cross-section of a motor in one embodiment of the present invention.

[0031] Figure 9 Schematic diagram of the structure of a vacuum cleaner in one embodiment of the present invention.

[0032] Description of labels:

[0033] 10. Motor fan blade; 11. Fan disc; 12. Fan blade; 111. Shaft hole; 121. Tail end; 122. Front end; 123. Inner side; 124. Outer side; 112. Large end; 113. Small end; 1221. First side; 1222. Second side; 1211. Third side; 1212. Fourth side; 100. Motor; 20. Housing; 21. Fan hood; 200. Vacuum cleaner; 210. Outer casing; 220. Dust collecting unit; 230. Suction generating unit; 240. Air duct unit; 250. Floor brush. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0035] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0036] It can be understood that the first direction described in this embodiment is a clockwise direction or a counterclockwise direction, and the second direction is a direction opposite to the first direction. In the following embodiments, the first direction is a counterclockwise direction and the second direction is a clockwise direction.

[0037] See also Figures 1 to 6 As shown, the present invention provides a motor fan blade, a motor and an electric tool to solve the problems of existing vacuum cleaner motors using centrifugal impellers, which result in larger volume under the same performance, cannot withstand very high speeds, have low impeller processing precision, are prone to vibration, and are noisy. Specifically, the motor fan blade 10 includes a fan blade disc 11 and fan blades 12. The fan blade disc 11 is an overall conical structure with an axial hole 111 provided in the middle thereof. The axial hole 111 is used to cooperate with the motor shaft of the motor. A plurality of fan blades 12 are evenly distributed on the fan blade disc 11. The plurality of fan blades 12 are arranged around the axial hole 111, and the fan blades 12 extend from the outer edge of the fan blade disc 11 to the axial hole 11 along a first direction and are arranged in a spiral.

[0038] See also Figure 1 and Figure 2As shown, in this embodiment, the thickness of the wind blade 12 gradually increases from both ends to the middle. Specifically, the wind blade 12 includes a tail end 121 and a front end 122. The tail end 121 is the end of the wind blade 121 close to the outer edge of the wind blade disc 11, and the front end 122 is the end of the wind blade disc 11 close to the shaft hole 111. In the spiral direction of the wind blade 12, the thickness of the wind blade 12 gradually increases from the front end 122 and the tail end 121 to the middle, which increases the blade strength to a certain extent, allowing it to withstand higher rotation speeds.

[0039] See also Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, the wind blade 12 has an arc-shaped structure, and the two sides of the wind blade 12 along the first direction are the inner side 123 and the outer side 124 of the arc-shaped structure respectively. The two adjacent wind blades 12 form an air flow channel, and at the same position, the curvature radius of the inner side 123 is greater than the curvature radius of the outer side 124. For example, at the thickest part of the wind blade 12, the curvature radius of the inner side 123 is greater than the curvature radius of the outer side 124, and its cross-section is crescent-shaped. The arc degrees on both sides of the wind blade 122 are not equal, that is, it adopts a non-parallel design, so that the airflow can flow smoothly in the blade, and its flow rate is uniform, which can reduce noise and improve the efficiency of the wind blade, so that under the same performance, the motor fan blade is smaller and the noise is lower, achieving the high performance, miniaturization, lightweight and low noise of the vacuum cleaner motor.

[0040] See also Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, the wind blade 12 is arranged at an angle to the wind blade disc 11. Specifically, the tangent of the outer edge of the wind blade disc 11 at the tail end 121 of the wind blade 12 is arranged at an angle to the tail end 121 of the wind blade 12. For example, along the second direction, the tangent and the tail end 121 of the wind blade 12 are non-vertical, that is, an angle α is formed between the tangent and the tail end 121 of the wind blade 12, and the angle α is set between 98° and 105° to reduce the noise when the wind blade rotates.

[0041] See also Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, in this embodiment, the air inlet of the wind blade 12 is arranged obliquely to the axis of the wind blade disc 11, that is, the front end 122 of the wind blade 12 is arranged obliquely to the axial direction of the wind blade disc 11. Specifically, the wind blade disc 11 with a conical structure includes a large end 112 and a small end 113. The front end 122 of the wind blade 12 includes a first side 1221 and a second side 1222. The first side 1221 is a side connected to the wind blade disc 11, and the second side 1222 is a side away from the wind blade disc 11. In the direction X from the small end 113 to the large end 112, the second side 1222 of the front end 122 is arranged obliquely to the first side 1221, so as to be obliquely arranged with respect to the axial direction of the wind blade disc 11, and the smaller angle β formed between the front end 12 and the axial direction of the wind blade disc 11 is set between 75° and 85°, so as to further reduce the noise when the fan blade rotates and improve the comfort of use.

[0042] See also Figure 1 、 Figure 2 、 Figure 4 and Figure 6 As shown, in this embodiment, along the axial direction of the wind blade disc 11, an angle γ is formed between the tail end 121 of the wind blade 12 and the outer edge of the wind blade disc 11. Specifically, the tail end 121 of the wind blade 12 includes a third side 1211 and a fourth side 1212, the third side 1211 is a side connected to the wind blade disc 11, and the fourth side 1212 is a side away from the wind blade disc 11. In the radial direction of the wind blade disc 11, the third side 1211 to the fourth side 1212 are formed by extending from the outer edge of the wind blade disc 11 away from the outer edge, so that an angle γ is formed between the tail end 121 and the outer edge of the wind blade disc 11, and the angle γ is set between 140° and 160°. In this embodiment, the maximum outer diameter of the wind blade 12 is greater than the outer diameter of the wind disc 11, that is, the tail end 121 of the wind blade 12 protrudes outward relative to the outer edge of the wind disc 11, and the maximum outer diameter D1 of the tail end 121 of the wind blade 12 is 1.05 times to 1.15 times its minimum outer diameter D2. The maximum outer diameter D1 is the side of the tail end 121 of the wind blade 12 away from the wind disc 11, that is, the fourth side 1212, and the minimum outer diameter D2 is the side where the tail end 121 of the wind blade 12 is connected to the wind disc 11, that is, the third side 1211, so as to further reduce the noise when the wind blade rotates.

[0043] See also Figures 1 to 8As shown, the present invention also proposes a motor 100, which includes a shell 20, one end of which is provided with a wind cover 21, the interior of the shell 20 is provided with a stator assembly and a rotor assembly, the middle of the rotor assembly is provided with a rotating shaft, and a motor fan 10 is provided in the wind cover 21, the axial hole of the motor fan blade 10 is relatively fixedly connected to the rotating shaft, and the large end of the fan disc 11 in the motor fan blade 10 is close to the rotor assembly, wherein the structure of the motor fan blade 10 is the same as or similar to the motor fan blade 10 described in the above embodiment, and in order to avoid repetition, it will not be repeated here.

[0044] See also Figures 1 to 9 As shown, the present invention further provides a power tool, which includes the motor 100 described in the above embodiment. The power tool is a vacuum cleaner, a hair dryer, a pruner, or a chain saw. For example, a vacuum cleaner 200 is used as an example for description: the vacuum cleaner 200 includes the motor 100 described in the above embodiment. For example, the vacuum cleaner 200 includes a shell 210, a dust collecting unit 220 installed on the shell 210, a suction generating unit 230, an air duct unit 240 and a floor brush 250. The shell 210 includes a body, a handle and a base. The handle is arranged between the body and the base. The air duct unit 240 is used to cooperate with the air inlet and the floor brush 250. The suction generating unit 230 is connected to the side of the body away from the handle. The suction generating unit 230 includes a casing and a motor 100 arranged in the casing. The vacuum cleaner 100 includes a motor fan blade 10. The structure of the motor fan blade 10 is the same or similar to that of the motor fan blade 10 described in the above embodiment. To avoid repetition, it will not be repeated here.

[0045] The utility model proposes a motor fan blade, a motor and an electric tool, which are designed as a turbine fan blade structure. The fan blade has a structure that is thick in the middle and thin at both ends, which increases the strength of the blade and enables it to withstand a higher rotation speed. By reasonably designing the angle between the tail end of the fan blade and the fan disk, the angle at the wind inlet of the fan blade, and the size of the fan blade, the cavity flow field is smoother and the efficiency is improved. Under the same performance, the volume is smaller and the noise is lower, thereby achieving the goals of high performance, miniaturization, lightweight and low noise of the motor.

[0046] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

[0047] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A motor fan blade, characterized in that: include: A fan blade disc, wherein a shaft hole is provided in the middle of the fan blade disc; Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

2. The motor fan blade according to claim 1, characterized in that: The wind blade has an arc-shaped structure, and the two sides of the wind blade along the first direction are the inner side and the outer side of the arc-shaped structure respectively, and at the same position, the arc radius of the inner side is greater than the arc radius of the outer side.

3. The motor fan blade according to claim 1, characterized in that: A tangent line of the outer edge of the wind blade disc at the tail end of the wind blade is arranged obliquely to the tail end of the wind blade.

4. The motor fan blade according to claim 3, characterized in that: Along the second direction, the angle between the tangent line and the tail end of the wind blade is between 98° and 105°, wherein the first direction is one of clockwise and counterclockwise, and the second direction is opposite to the first direction.

5. The motor fan blade according to claim 1, characterized in that: The front end of the wind blade and the axis of the wind blade disc form an angle of 75° to 85°.

6. The motor fan blade according to claim 1, characterized in that: Along the axial direction of the fan disk, the angle between the tail end of the fan blade and the outer edge of the fan disk is between 140° and 160°.

7. The motor fan blade according to claim 6, characterized in that: The maximum outer diameter of the wind blade is greater than the outer diameter of the wind blade disk.

8. The motor fan blade according to claim 7, characterized in that: The maximum outer diameter of the tail end of the wind blade is 1.05 to 1.15 times the minimum outer diameter.

9. A motor, characterized in that: It includes a housing, a stator assembly and a rotor assembly arranged in the housing, and A motor fan blade, the motor fan blade is connected to the rotating shaft of the rotor assembly, and the motor fan blade includes: a fan blade disk, and a shaft hole is provided in the middle of the fan blade disk; Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

10. An electric tool, characterized in that: The motor comprises a housing, a stator assembly and a rotor assembly disposed in the housing, and A motor fan blade, the motor fan blade is connected to the rotating shaft of the rotor assembly, and the motor fan blade includes: a fan blade disk, and a shaft hole is provided in the middle of the fan blade disk; Multiple wind blades are arranged on the wind blade disk in a spiral shape along a first direction, and multiple wind blade disks are evenly distributed on the wind blade disk. The wind blades include a tail end close to the outer edge of the wind blade disk and a front end close to the shaft hole. In the spiral direction of the wind blades, the thickness of the wind blades gradually increases from the front end and the tail end to the middle.

11. The electric tool according to claim 10, wherein: The electric tool is a vacuum cleaner, a hair dryer, a pruner and a chain saw.

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