Open type motor with double axial flow fan blades

Abstract

The invention discloses an open type motor with double axial-flow fan blades, and the motor comprises a housing which is internally provided with a cavity penetrating through the two ends of the housing, and a rotor which is arranged in the cavity and comprises a first rotating shaft, and a commutator, a first axial-flow fan, a rotor iron core and a second axial-flow fan are sequentially installed on the first rotating shaft in the extension direction of the first rotating shaft; the plurality of magnetic steels are mutually assembled to form a circular ring shape, and the magnetic steels and the shell form a stator; the first rotating shaft passes through the magnetic steel and enables the rotor core to be arranged in the magnetic steel. The gear disc is rotationally connected with the first rotating shaft, and the outer side wall of the gear disc abuts against the inner side wall of the cavity; the movable impeller is internally provided with a second rotating shaft, and the second rotating shaft is rotationally connected with the gear disc and is driven by the gear disc to rotate; the occupied space of the motor in a product can be reduced, the heat dissipation effect of the motor is improved, the use efficiency of the motor is also improved, and electric energy is saved.

Description

Technical Field

[0001] The invention relates to the field of motors, and in particular to an open motor with double axial flow blades. Background Art

[0002] A brushed motor is a rotating motor that contains a brush device that converts electrical energy into mechanical energy or mechanical energy into electrical energy. Unlike a brushless motor, the brush device is used to introduce or extract voltage and current. The brushed motor is the basis of all motors. It has the characteristics of fast starting, timely braking, smooth speed regulation in a wide range, and relatively simple control circuits.

[0003] Nowadays, many devices or electrical appliances use brushed motors, especially DC brushed motors, which are more widely used. Existing DC brushed motors are large in size and low in power, which are not convenient for use; and DC brushed motors will inevitably generate a lot of heat in the process of converting electrical energy into mechanical energy, which will increase the temperature of the motor. Usually, a fan is set in the motor to blow away the heat generated by the motor to reduce the heat generated by the motor. However, due to the limited air volume of the motor rotation and the small air volume of the fan, the expected cooling effect cannot be achieved. This causes the motor to run at too high a temperature for a long time, which will reduce the service life of the motor and even burn the motor, making it very unsafe to use. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing brushed motor has limited air volume, the fan has small air volume, and cannot achieve the expected cooling effect. The present invention provides an open motor with double axial flow fan blades, which can reduce the space occupied by the motor in the product, improve the heat dissipation effect of the motor, increase the efficiency of the motor, and save electricity.

[0005] In order to solve the above technical problems, the embodiment of the present invention discloses an open motor with double axial flow blades, comprising: The shell has a cavity extending through both ends thereof, and a device disposed in the cavity. The rotor comprises a first rotating shaft, and along the extending direction of the first rotating shaft, a commutator, a first axial flow fan, a rotor core and a second axial flow fan are sequentially mounted on the first rotating shaft; A plurality of magnetic steels are assembled to form a ring shape, and the magnetic steels and the housing form a stator; the first rotating shaft passes through the magnetic steel and the rotor core is arranged inside the magnetic steel; A gear plate is rotatably connected to the first rotating shaft, and an outer wall of the gear plate abuts against an inner wall of the cavity; The impeller has a second rotating shaft disposed therein, the second rotating shaft is rotatably connected to the gear plate and driven to rotate by the gear plate; A rubber cover is arranged at one end of the shell close to the commutator, and a brush assembly is arranged on the rubber cover. The brush assembly includes a carbon brush, and the carbon brush rests on the outer surface of the commutator.

[0006] By adopting the above technical solution, the heat dissipation effect of the motor can be improved while increasing the use efficiency of the motor and saving electric energy.

[0007] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that an air duct is opened on the inner wall of the cavity, and the air duct is arranged at the abutment between the gear plate and the cavity.

[0008] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the brush assembly further includes: A carbon brush plate is fixed on the rubber cover, the carbon brush plate is provided with a mounting groove, the carbon brush part is mounted in the mounting groove and extends out of the mounting groove to abut against the outer surface of the commutator; The torsion spring is provided with a protrusion on the rubber cover, the torsion spring is sleeved on the protrusion, and the two ends of the torsion spring are respectively in contact with the rubber cover and the carbon brush.

[0009] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that two brush assemblies are provided and symmetrically arranged on the rubber cover.

[0010] According to another specific embodiment of the present invention, the embodiment of the present invention discloses further including a lead wire, wherein two lead wires are provided and respectively connected to two brush assemblies.

[0011] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a front end cover which is connected to one end of the housing close to the commutator, and a through hole is formed in the front end cover, through which the lead wire passes and extends out.

[0012] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the outer sleeve of the first axial flow fan is provided with a wind collecting cover, and the wind collecting cover is connected to the outer shell.

[0013] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the gear plate includes at least one gear set, and three planetary gears are respectively meshed and connected in the gear set.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the housing includes a first shell and a second shell, and the second shell is detachably connected to the first shell.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that an impeller cover is also sleeved on the outside of the impeller, and the impeller cover is fixedly connected to the outer casing.

[0016] The beneficial effects of the present invention are as follows: by adopting the design of double axial flow fans, the heat dissipation air volume of the motor is increased, the heat dissipation effect of the motor is improved, and the use efficiency of the motor is increased, thereby saving electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram showing the structure of an open motor with double axial flow blades according to an embodiment of the present invention Figure 1 ; Figure 2 A cross-sectional view showing an open motor with double axial flow fan blades according to an embodiment of the present invention; Figure 3 A schematic diagram showing the structure of a first axial flow fan with dual axial flow blades according to an embodiment of the present invention; Figure 4 A schematic diagram showing the structure of a first axial flow fan with dual axial flow blades according to an embodiment of the present invention; Figure 5 Schematic diagram showing the structure of an open motor with double axial flow blades according to an embodiment of the present invention Figure 2 ; Figure 6 Schematic diagram showing the structure of an open motor with double axial flow blades according to an embodiment of the present invention Figure 3 ; Figure 7 Schematic diagram showing the structure of an open motor with double axial flow blades according to an embodiment of the present invention Figure 4 .

[0018] Figure numerals: housing 1; rotor 2; first rotating shaft 21; commutator 22; first axial flow fan 23; first blade 231; support frame 232; rotor core 24; second axial flow fan 25; rotating base 251; second blade 252; stator 3; magnetic steel 31; brush assembly 4; carbon brush plate 41; mounting groove 42; rubber cover 5; impeller 6; second rotating shaft 61; gear plate 7; gear set 71; impeller cover 8; lead 9. DETAILED DESCRIPTION

[0019] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0021] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0023] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1 to 7 The present invention provides an open motor with double axial flow blades, comprising: The housing 1 has a cavity extending through both ends thereof, and a device disposed in the cavity. The rotor 2 comprises a first rotating shaft 21, and along the extending direction of the first rotating shaft 21, a commutator 22, a first axial flow fan 23, a rotor core 24 and a second axial flow fan 25 are sequentially mounted on the first rotating shaft 21; A plurality of magnetic steels 31 are assembled to form a circular ring, and the magnetic steels 31 and the housing 1 form a stator 3; the first rotating shaft 21 passes through the magnetic steels 31 and the rotor core 24 is disposed inside the magnetic steels 31; The gear plate 7 is rotatably connected to the first rotating shaft 21, and the outer wall of the gear plate 7 abuts against the inner wall of the cavity; The impeller 6 has a second rotating shaft 61 disposed therein, and the second rotating shaft 61 is rotatably connected to the gear plate 7 and driven to rotate by the gear plate 7; A rubber cover 5 is provided at one end of the housing 1 close to the commutator 22 , and a brush assembly 4 is provided on the rubber cover 5 . The brush assembly 4 includes carbon brushes, and the carbon brushes are against the outer surface of the commutator 22 .

[0026] In this embodiment, the housing 1 is a cylindrical housing, and a cavity is provided inside the housing for accommodating the rotor 2 and the stator 3, wherein the commutator 22, the first axial flow fan 23, the rotor core 24, the second axial flow fan 25 and the gear plate 7 rotate together driven by the first rotating shaft 21. By adopting two axial flow fans, when the motor is running, the rotation of the first rotating shaft 21 can drive the first axial flow fan 23 and the second axial flow fan 25 to rotate simultaneously, and the first rotating shaft 21 drives the first axial flow fan 23 to rotate, and the first axial flow fan 23 generates an axial cooling airflow and flows along the extension direction of the first rotating shaft 21, thereby taking away the heat generated by the motor. When flowing through the second axial flow fan 25, the cooling airflow has gradually become hot air, and at this time, the hot air is thrown out from the circumferential direction by the second axial flow fan 25. The entire flow process of the above cooling airflow can effectively cool the motor as a whole, and the cooling is sufficient to avoid local overheating, which greatly improves the cooling effect, and the overall cooling process will not increase the vibration and noise of the motor, and low-noise heat dissipation is achieved. The dual axial flow fan design speeds up the air flow rate in the casing, effectively reduces the heat generated in the motor, achieves better heat dissipation, longer service life, and higher power. At the same time, as the efficiency of the motor is improved, the use of the rotor core 24 can be reduced, and the length of the rotor core 24 is shortened by 10 mm, which reduces the use of the rotor core 24 and the amount of copper wire, thereby reducing costs. The dual axial flow fan design is adopted, and both axial flow fans are installed in the casing. The first axial flow fan 23 and the second axial flow fan 25 are respectively fixed at both ends of the first rotating shaft 21, which can increase the air volume and wind speed in the motor. The entire structure is compact, easy to disassemble and assemble, and has a stable structure. The fan has a long service life. The motor is lighter and more flexible to install, which can reduce the space occupied by the motor in the product. Continue to refer to Figure 3, an embedding groove is provided on the rotor core 24, and a fixing portion is provided on the first axial fan 23 facing the side of the rotor core 24. The first axial fan 23 is driven to rotate by the rotor core 24. The figure shows a structural schematic diagram of the first axial fan 23. The first axial fan 23 includes an annular support frame 232, and first blades 231 are evenly spaced along the inner and outer diameters of the support frame 232. The first blades 231 are arc-shaped, wherein according to the blade height and blade length of the first blade 231, the angle of the tangent at the connection between the first blade 231 and the support frame 232 is 30-60 degrees, and the arc radius of each first blade 231 is 8-18mm. In order to maximize the air volume of the first blade 231 and reduce the noise of the first blade 231 when blowing air, the tangent angle at the connection between the first blade 231 and the support frame 232 is preferably set at a 42-degree angle, and the arc radius of each first blade 231 is preferably 12mm. Figure 3 , it is shown that the number of first blades 231 on the support frame 232 is 11, but the present application does not limit the number of first blades 231 on the support frame 232, and the number of first blades 231 is set according to actual needs, for example, the number of first blades 231 can also be 9 or 15. By setting the angle of the first blades 231 to 42 degrees, the air volume generated by the first axial flow fan 23 when rotating can be maximized, and the noise generated by the first axial flow fan 23 when rotating can be minimized, thereby avoiding noise pollution.

[0027] Continue to refer to Figure 4 , Figure 4 , a schematic diagram of the structure of the second axial flow fan 25 is shown, the second axial flow fan 25 comprises a rotating base 251, on which a second fan blade 252 is mounted, the second fan blade 252 is arc-shaped, and its thickness is designed to be thick in the middle and thin at both ends along the arc direction, wherein the second fan blade 252 and the extending direction of the rotating base 251 ( Figure 4 According to the height and length of the second blade 252, the angle between the second blade 252 and the rotating base 251 is 30-60 degrees. Figure 4 It is shown that the second blade 252 is tilted at an angle of 36 degrees to the rotating base 251, and 7 second blades 252 are arranged on the rotating base 251. The present application does not limit the number of second blades 252 on the rotating base 251, and it is arranged according to actual needs. For example, the number of second blades 252 can also be 9 or 15. Designing the second blade 252 to be thick in the middle and thin at both ends can increase the structural strength of the second blade 252 and extend the service life of the second blade 252. The second blade 252 is tilted at an angle to the extension direction of the rotating base 251, so that the second blade 252 has the maximum air volume and low noise at such a thickness, and can better transfer heat to the outside.

[0028] The gear plate 7 fixes the rotor 2 and the stator 3 in the cavity, and the impeller 6 is used to suck air so that the vacuum cleaner can normally perform the vacuuming action. When the first rotating shaft 21 rotates, the first rotating shaft 21 drives the gear in the gear plate 7 to rotate, and the second rotating shaft 61 rotatably connected to the gear plate 7 also rotates, and drives the impeller 6 on the second rotating shaft 61 to rotate, so that the impeller 6 can play the role of vacuuming. The above technical solution can improve the heat dissipation effect of the motor while increasing the use efficiency of the motor and saving electric energy.

[0029] In an implementable embodiment, an air duct is opened on the inner wall of the cavity, and the air duct is arranged at the abutment between the gear plate 7 and the cavity.

[0030] In this embodiment, the gear plate 7 fixes the rotor 2 and the stator 3 in the cavity, which can prevent dust and other impurities outside the housing 1 from entering the rotor 2 and the stator 3, and the external cooling air flow is sucked into the motor by the first axial flow fan 23 through the air duct.

[0031] Continue to refer to Figure 5 In one feasible embodiment, the brush assembly 4 further includes: A carbon brush plate 41 is fixed on the rubber cover 5. The carbon brush plate 41 is provided with a mounting groove 42. The carbon brush part is mounted in the mounting groove 42 and extends out of the mounting groove 42 to abut against the outer surface of the commutator 22. The torsion spring 52 is provided with a protrusion 51 on the rubber cover 5, and the torsion spring 52 is sleeved on the protrusion 51. The two ends of the torsion spring 52 are respectively in contact with the rubber cover 5 and the carbon brush.

[0032] In this embodiment, the carbon brush plate 41 is fixed on the rubber cover 5, and the carbon brush is fixed on the carbon brush plate 41 by opening a mounting groove 42 so that the carbon brush can abut against the commutator 22. In order to prevent the carbon brush from loosening or shifting during use, a torsion spring 52 is used to fix the carbon brush in the mounting groove 42.

[0033] In an implementable embodiment, two brush assemblies 4 are provided, symmetrically arranged on the rubber cover 5 and further include lead wires 9 , two lead wires 9 are provided, and are respectively connected to the two brush assemblies 4 .

[0034] In this embodiment, the carbon brush can transfer the external current to the rotating rotor 2, and can also introduce the static charge on the shaft into the ground, change the direction of the current, and lead the shaft to the protection device for grounding protection of the rotor 2 and measuring the positive and negative voltages of the rotor 2 to the ground. The lead wire 9 is provided with two leads connected to the neutral and live wires of the external power supply, and each lead wire 9 is connected to a brush assembly 4.

[0035] In an implementable embodiment, it further includes a front end cover, which is connected to the end of the housing 1 close to the commutator 22, and the front end cover is provided with a through hole, through which the lead wire 9 passes and extends out.

[0036] In this embodiment, the front end cover of the present invention has an arched support structure, the top of the arch is connected to the arch plane, and the outer wall of the arch plane is provided with reinforcing ribs to effectively prevent the arch plane from being deformed by force. The front end cover further includes corner reinforcing ribs, which are arranged at the upper and lower corners of the arch to improve the supporting capacity of the front end cover. The bottom of the arch protrudes outward to provide a mounting plane, and a plurality of protrusions 51 are formed on the outer wall of the mounting plane. The mounting plane between the plurality of protrusions 51 protrudes downward to provide protrusions, and the outer wall of the protrusion fits against the inner wall of the casing to play a role in positioning the front end cover. The distance between the protrusions at both ends is the same as the inner diameter of the casing, so that the front end cover and the inner wall of the casing cooperate to ensure concentricity, and the protrusion 51 is correspondingly installed in the groove, which supports the front end cover, and the front end cover is fixed to the casing by riveting, thereby completing the installation of the front end cover without the need for complicated and cumbersome processes, simplifying the assembly of the motor and improving the production efficiency of the motor.

[0037] The front cover is used to shield the brush assembly 4 to prevent the brush assembly 4 from being directly exposed to the outside. At the same time, by opening a through hole in the front cover, when the second axial flow fan 25 throws the hot air out in the circumferential direction, the hot air can be discharged to the outside through the through hole.

[0038] In an implementable embodiment, the first axial flow fan 23 is provided with an air collecting cover on its exterior, and the air collecting cover is connected to the housing 1 .

[0039] In this embodiment, the axis of the wind collecting hood coincides with the axis of the first axial fan 23. The rotation of the first axial fan 23 will form a cooling airflow that flows axially along the motor shaft, and the wind collecting hood and the magnetic steel 31 can jointly form a guide channel inside the channel for guiding the cooling airflow generated by the first axial fan 23 to flow axially along the first rotating shaft 21. That is, it can effectively prevent the axial airflow from dissipating to the surroundings, so that the axial airflow can fully flow along the extension direction of the first rotating shaft 21, taking away the heat generated by the motor. When flowing through the second axial fan 25, the second axial fan 25 uses centrifugal force to throw the airflow out from the circumferential direction and finally discharge it. The airflow flow in the above process can play a good cooling and heat dissipation role for the motor.

[0040] In one embodiment, a gap is left between the inner wall of the first air collecting cover and the outer edge of the blade of the first axial flow fan 23 (the outermost edge of the blade) to reduce the loss caused by the backflow of cooling air. A clamping piece is connected to the air collecting cover, and a mounting seat is connected to the magnetic steel 31. The mounting seat is provided with a clamping groove, and the clamping piece is inserted into the clamping groove.

[0041] Continue to refer to Figure 7 In an implementable embodiment, the gear plate 7 includes at least one gear set 71, and three planetary gears are respectively meshed and connected in the gear set 71.

[0042] In this embodiment, a bearing is provided at the connection between the first rotating shaft 21 and the gear plate 7. The first rotating shaft 21 passes through the bearing and is rotatably connected to the gear plate 7. The gear plate 7 is provided with at least one set of gear sets 71. The three planetary gear sets 71 respectively meshed and connected in the gear sets 71 form a planetary reducer. The planetary reducer can amplify the torque of the motor, so that we can use a small-power motor to achieve a large torque output. In an implementable embodiment, Figure 7 It is shown in the figure that the gear plate 7 includes two gear sets 71, but the present application does not limit the number of gear sets 71. A corresponding number of gear sets 71 can be set according to actual needs, for example, three gear sets 71 can be set.

[0043] In an implementable embodiment, the housing 1 includes a first shell and a second shell, and the second shell is detachably connected to the first shell.

[0044] In this embodiment, the first shell and the second shell can be disassembled and assembled into a whole, wherein the outer shell 1 and the front cover can also be fixedly connected by a connecting piece, and threaded holes are respectively opened on the outer shell 1, the fixing piece and the front cover, which are fixedly connected by screws.

[0045] In an practicable embodiment, an impeller cover 8 is further sleeved on the outside of the impeller 6, and the impeller cover 8 is fixedly connected to the housing 1. The impeller cover 8 is sleeved on the outer wall of the end cover.

[0046] In this embodiment, the impeller cover 8 can block dust and prevent external dust from directly falling onto the impeller 6.

[0047] The cooling process of the motor in this embodiment is as follows: the first rotating shaft 21 drives the first axial flow fan 23 to rotate, the first axial flow fan 23 generates an axial cooling airflow and flows along the extension direction of the first rotating shaft 21, thereby taking away the heat generated by the motor. When flowing through the second axial flow fan 25, the cooling airflow has gradually turned into hot air. At this time, the hot air is thrown out from the circumferential direction by the second axial flow fan 25. The entire flow process of the above-mentioned cooling airflow can effectively cool the motor as a whole, and the cooling is sufficient to avoid local overheating, which greatly improves the cooling effect. In addition, the overall cooling process will not enhance the vibration and noise of the motor, thereby achieving low-noise heat dissipation.

[0048] The motor with a dual-fan cooling system in this embodiment greatly improves the cooling effect of the motor through the cooperation of the dual axial fans, and can effectively improve the heat dissipation effect of the motor; at the same time, the structure is simple and compact, easy to process, will not increase the size of the motor, and also greatly reduces the production cost of the motor; it greatly reduces the noise and vibration of the motor during the heat dissipation process, and effectively improves the service life of the motor.

[0049] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An open motor with double axial flow blades, characterized in that: include: The housing (1) has a cavity extending through both ends thereof, and a device disposed in the cavity. The rotor (2) comprises a first rotating shaft (21), and along the extension direction of the first rotating shaft (21), a commutator (22), a first axial flow fan (25), a rotor core (24) and a second axial flow fan (23) are sequentially mounted on the first rotating shaft (21); a plurality of magnetic steels (31), wherein the plurality of magnetic steels (31) are assembled together to form a circular ring, and the magnetic steels (31) and the housing (1) form a stator (3); the first rotating shaft (21) passes through the magnetic steels (31) and the rotor core (24) is arranged inside the magnetic steels (31); A gear plate (7) is rotatably connected to the first rotating shaft (21), and an outer wall of the gear plate (7) abuts against an inner wall of the cavity; A moving impeller (6), wherein a second rotating shaft (61) is arranged inside the impeller, and the second rotating shaft (61) is rotationally connected to the gear plate (7) and is driven to rotate by the gear plate (7); A rubber cover (5) is provided at one end of the housing (1) close to the commutator (22), a brush assembly (4) is provided on the rubber cover (5), and the brush assembly (4) comprises a carbon brush, and the carbon brush abuts against the outer surface of the commutator (22).

2. The open motor with double axial flow blades as claimed in claim 1, characterized in that: An air duct is provided on the inner wall of the cavity, and the air duct is arranged at the abutment point between the gear plate (7) and the cavity.

3. The open motor with double axial flow blades as claimed in claim 1, characterized in that: The brush assembly (4) further comprises: A carbon brush plate (41) is fixed on the rubber cover (5), the carbon brush plate (41) is provided with a mounting groove (42), the carbon brush portion is mounted in the mounting groove (42) and extends out of the mounting groove (42) to abut against the outer surface of the commutator (22); A torsion spring, wherein the rubber cover (5) is provided with a protrusion, the torsion spring is sleeved on the protrusion, and two ends of the torsion spring are respectively in contact with the rubber cover (5) and the carbon brush.

4. The open motor with double axial flow blades as claimed in claim 3, characterized in that: The brush assemblies (4) are provided with two, which are symmetrically arranged on the rubber cover (5).

5. The open motor with double axial flow blades as claimed in claim 4, characterized in that: It also includes a lead wire (9), two of which are provided and are respectively connected to the two brush assemblies (4).

6. The open motor with double axial flow blades as claimed in claim 5, characterized in that: It also includes a front end cover, the front end cover is connected to one end of the housing (1) close to the commutator (22), the front end cover is provided with a through hole, and the lead wire (9) passes through and extends out of the through hole.

7. The open motor with double axial flow blades as claimed in claim 1, characterized in that: The first axial flow fan (25) is provided with an air collecting cover on its exterior, and the air collecting cover is connected to the outer casing (1).

8. The open motor with double axial flow blades as claimed in claim 1, characterized in that: The gear plate (7) comprises at least one gear set (71), and three planetary gears are respectively meshed and connected in the gear set (71).

9. The open motor with double axial flow blades as claimed in claim 1, characterized in that: The housing (1) comprises a first shell and a second shell, wherein the second shell is detachably connected to the first shell.

10. The open motor with double axial flow blades according to claim 1, characterized in that: An impeller cover (8) is also sleeved on the outside of the moving impeller (6), and the impeller cover (8) is fixedly connected to the outer casing (1).

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