Open type motor

Abstract

The invention discloses an open-type motor, and the motor comprises a housing which is internally provided with a through hole penetrating through the two ends of the housing, and the inner side wall, close to one end of the housing, in the through hole is provided with a plurality of positioning grooves; the outer side wall of the rubber cover is provided with positioning protrusions corresponding to the positioning grooves, the positioning protrusions are installed in the positioning grooves so that the rubber cover can be fixedly connected with the shell, and the rubber cover is further provided with a plurality of ventilation holes and an installation hole located in the center of the rubber cover. The electric brush assembly comprises a carbon brush plate and a carbon brush, the carbon brush plate is fixedly installed on the rubber cover, a fixing piece is arranged on the carbon brush plate, a fixing hole penetrating through the two ends of the fixing piece is formed in the fixing piece, and the carbon brush penetrates through one end of the fixing hole, extends out of the other end of the fixing hole and then faces the installation hole. By adopting the design of an axial installation mode, the occupied space of the motor in a product can be reduced, the motor is simpler to assemble, and the motor has a mistake-proof structural design, the performance of the motor is more stable, and the production efficiency is higher.

Description

Technical Field

[0001] The invention relates to the field of motors, and in particular to an open motor. 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 over a wide range, and relatively simple control circuits. Now many devices or electrical appliances use brushed motors, especially DC brushed motors are more widely used.

[0003] However, the existing DC brush motor is large in size, and the outer shell adopts radial assembly, which results in a large outer shell and a complicated installation process, which is not conducive to use. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the existing brushed motor has a large volume, the outer shell adopts radial assembly, the outer shell has a large volume, the installation process is complicated, and it is not conducive to use. The present invention provides an open motor, which can reduce the space occupied by the motor in the product, make the motor assembly simpler, have a mistake-proof structural design, make the motor performance more stable, and have higher production efficiency.

[0005] In order to solve the above technical problems, an embodiment of the present invention discloses an open motor, comprising: The shell has through holes extending through both ends thereof, and a plurality of positioning grooves are provided on the inner wall of the through hole near one end of the shell; The rubber cover has a positioning protrusion on its outer wall corresponding to the positioning groove, the positioning protrusion is installed in the positioning groove to fix the rubber cover to the shell, and the rubber cover is also provided with a plurality of ventilation holes and a mounting hole located at the center of the rubber cover; The brush assembly includes a carbon brush plate and a carbon brush. The carbon brush plate is fixedly mounted on the rubber cover. A fixing piece is arranged on the carbon brush plate. The fixing piece has fixing holes penetrating both ends thereof. The carbon brush passes through one end of the fixing hole and extends out of the other end of the fixing hole and then is arranged toward the mounting hole. A rotor is arranged in the through hole, the rotor comprises a first rotating shaft and a commutator, the first rotating shaft partially passes through and extends out of the mounting hole, the commutator is sleeved on the first rotating shaft and arranged close to the mounting hole, and the carbon brush abuts against the commutator; A plurality of magnets are arranged in the through hole, the plurality of magnets are assembled to form a circular ring, and the magnets and the shell form a stator; the first rotating shaft passes through the magnets.

[0006] By adopting the above technical solution, the space occupied by the motor in the product can be reduced, the motor assembly is simpler, the motor has an error-proof structural design, the motor performance is more stable, and the production efficiency is higher.

[0007] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that a protrusion is provided 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 one end of the carbon brush away from the commutator.

[0008] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the housing includes an arc-shaped first shell and a second shell, and the first shell and the second shell form a cylindrical shell with openings at both ends.

[0009] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a front end cover, wherein the outer wall of the front end cover is provided with a first threaded hole, and the outer shell is correspondingly provided with a second threaded hole, and the front end cover is fixedly connected to the outer shell by bolts.

[0010] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that a bearing is arranged at the center of the front end cover, and one end of the first rotating shaft extending out of the mounting hole is installed in the bearing and is rotatably connected to the bearing.

[0011] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a gear plate which is arranged in the through hole, the gear plate is rotationally connected to the other end of the first rotating shaft, and the outer wall of the gear plate abuts against the inner wall of the through hole.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses that an air duct is opened on the inner side wall of the through hole, and the air duct is arranged at the abutment between the gear plate and the through hole.

[0013] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a movable impeller, wherein a second rotating shaft is arranged inside the movable impeller, and the second rotating shaft is rotationally connected to the gear plate and driven to rotate by the gear plate.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that along the extension direction of the first rotating shaft, the first rotating shaft is also equipped with a first axial flow fan, a rotor core and a second axial flow fan in sequence, a stator winding is wound on the stator core, and the stator core is provided with channels running through both ends thereof, the first rotating shaft passes through the circular ring structure composed of magnetic steel and the rotor core is arranged inside the circular ring structure composed of magnetic steel.

[0015] 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.

[0016] The beneficial effects of the present invention are as follows: by adopting the axial installation design, the space occupied by the motor in the product can be reduced, the motor assembly is simpler, the error-proof structural design is provided, the performance of the motor is more stable, and the production efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram showing the structure of a housing of an open motor according to an embodiment of the present invention; Figure 2 The structure of the open motor according to the embodiment of the present invention is shown as follows Figure 1 ; Figure 3 The structure of the open motor according to the embodiment of the present invention is shown as follows Figure 2 ; Figure 4 Show Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 The structure of the open motor according to the embodiment of the present invention is shown as follows Figure 3 ; Figure 6 The structure of the open motor according to the embodiment of the present invention is shown as follows Figure 4 .

[0018] Figure numerals: housing 1; rubber cover 2; mounting hole 21; ventilation hole 22; positioning protrusion 23; protrusion 24; torsion spring 25; lead 26; rotor 3; first rotating shaft 31; commutator 32; first axial flow fan 33; rotor core 34; second axial flow fan 35; brush assembly 4; carbon brush plate 41; fixing part 42; carbon brush 43; stator 5; magnetic steel 51; front end cover 6; bearing 61; gear plate 7; gear set 71; impeller 8; second rotating shaft 81; impeller cover 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 4 The present invention provides an open motor, comprising: The housing 1 has through holes extending through both ends thereof, and a plurality of positioning grooves 11 are formed on the inner wall of the through hole near one end of the housing 1; The rubber cover 2 has a positioning protrusion 23 on its outer wall corresponding to the positioning groove 11. The positioning protrusion 23 is installed in the positioning groove 11 to fix the rubber cover 2 to the housing 1. The rubber cover 2 also has a plurality of ventilation holes 22 and a mounting hole 21 located at the center of the rubber cover 2. The brush assembly 4 includes a carbon brush plate 41 and a carbon brush 43. The carbon brush plate 41 is fixedly mounted on the rubber cover 2. A fixing member 42 is provided on the carbon brush plate 41. The fixing member 42 has fixing holes extending through both ends thereof. The carbon brush 43 passes through one end of the fixing hole and extends out of the other end of the fixing hole and is arranged toward the mounting hole 21. The rotor 3 is disposed in the through hole. The rotor 3 includes a first rotating shaft 31 and a commutator 32. The first rotating shaft 31 partially passes through and extends out of the mounting hole 21. The commutator 32 is sleeved on the first rotating shaft 31 and is disposed close to the mounting hole 21. The carbon brush 43 abuts against the commutator 32. A plurality of magnetic steels 51 are disposed in the through hole. The plurality of magnetic steels 51 are assembled to form a circular ring. The magnetic steels 51 and the housing form a stator 5 . The first rotating shaft 31 passes through the channel and is connected to the magnetic steels 51 .

[0026] In this embodiment, in the housing 1, the rubber cover 2 and the rotor 3 are assembled and installed in sequence along the extension direction of the first rotating shaft 31, which reduces the parts assembly of the motor in the vertical direction of the extension direction of the first rotating shaft 31, and the rubber cover 2 is detachably connected to the housing 1 by a chimeric type, making the installation more convenient. The design of the positioning groove 11 and the positioning protrusion 23 facilitates the staff to install the rubber cover 2 inside the housing 1, avoiding the displacement of the rubber cover 2 during installation, resulting in reduced assembly efficiency, and the design of the positioning groove 11 and the positioning protrusion 23 has a mistake-proofing function, which can remind the staff of the installation direction of the rubber cover 2 in the housing.

[0027] Reference Figure 3 and Figure 4 The brush assembly 4 is installed on the rubber cover 2, and can be easily and quickly disassembled and replaced with the disassembly of the rubber cover 2. The carbon brush 43 is clamped in the fixing part 42, and adopts a vertical suspension fixing method, which can make the carbon brush 43 face the commutator 32 in a fixed direction. At the same time, the suspension fixing method of the carbon brush 43 can be easily disassembled when the carbon brush 43 needs to be replaced, thereby improving the replacement efficiency. By adopting the above technical solution, the space occupied by the motor in the product can be reduced, the motor assembly is simpler, and the error-proof structural design is provided. The performance of the motor is more stable and the production efficiency is higher.

[0028] Continue to refer to Figure 2 In an implementable embodiment, a protrusion 24 is provided on the rubber cover 2, and a torsion spring 25 is sleeved on the protrusion 24, and two ends of the torsion spring 25 are respectively in contact with the rubber cover 2 and one end of the carbon brush 43 away from the commutator 32.

[0029] In this embodiment, since the motor will vibrate during use, in order to prevent the carbon brush 43 from shifting due to vibration when it abuts against the commutator 32, a torsion spring 25 is provided on the rubber cover 2, and the torsion spring 25 is fixedly installed on the rubber cover 2 through the protrusion 24, so that one end of the torsion spring 25 abuts against the rubber cover 2, and the other end of the torsion spring 25 abuts against the end of the carbon brush 43 away from the commutator 32, so that the carbon brush 43 is fixed in the fixing part 42. At the same time, as the carbon brush 43 is used, the torsion spring 25 can push the carbon brush 43 toward the commutator 32, so that the carbon brush 43 can be fully used.

[0030] In an implementable embodiment, the housing 1 includes an arc-shaped first shell and a second shell, and the first shell and the second shell form a cylindrical shell with openings at both ends.

[0031] In this embodiment, the housing 1 is enclosed by an arc-shaped first shell and a second shell to form a cylindrical shell with two ends opened, so that the housing 1 is easy to assemble and the accommodating space of the housing 1 can be increased.

[0032] In an implementable embodiment, the front end cover 6 is further included. The outer wall of the front end cover 6 is provided with a first threaded hole, and the housing 1 is correspondingly provided with a second threaded hole. The front end cover 6 is fixedly connected to the housing 1 by bolts 12. A bearing 61 is provided at the center of the front end cover 6, and one end of the first rotating shaft 31 extending out of the mounting hole 21 is installed in the bearing 61 and is rotatably connected to the bearing 61.

[0033] In this embodiment, the front end cover 6 is connected to the end of the housing 1 close to the commutator 32, and the front end cover 6 is provided with a through hole. The front end cover 6 of the present invention has an arched arched support structure, the arched top is connected to the arched plane, and the outer wall of the arched plane is provided with reinforcing ribs to effectively prevent the arched plane from being deformed by force. The front end cover 6 further includes corner reinforcing ribs, which are arranged at the upper and lower corners of the arch, and can improve the supporting capacity of the front end cover 6. The bottom of the arch is protruding outward to provide a mounting plane, and the outer wall of the mounting plane forms a plurality of protrusions 24 The mounting plane between the plurality of protrusions 24 is provided with a protrusion protruding downward, and the outer wall of the protrusion is fitted against the inner wall of the outer shell 1, which plays the role of positioning the front end cover 6. The distance between the protrusions at both ends is the same as the inner diameter of the outer shell 1, so that the front end cover 6 and the inner wall of the outer shell 1 cooperate to ensure concentricity. The protrusion 24 is correspondingly installed in the groove, and the groove supports the front end cover 6. The front end cover 6 and the outer shell 1 are fixed by bolts 12, thereby completing the installation of the front end cover 6 without complicated and tedious processes, simplifying the assembly of the motor and improving the motor production efficiency.

[0034] Reference Figure 5 and Figure 6 In an implementable embodiment, it further includes a gear plate 7, which is disposed in the through hole, the gear plate 7 is rotatably connected to the other end of the first rotating shaft 31, and the outer wall of the gear plate 7 abuts against the inner wall of the through hole. An air duct is provided on the inner wall of the through hole, and the air duct is provided at the abutment between the gear plate 7 and the through hole. It also includes a moving impeller 8, a second rotating shaft is provided inside the moving impeller 8, the second rotating shaft is rotatably connected to the gear plate 7, and is driven to rotate by the gear plate 7.

[0035] In this embodiment, the gear plate 7 fixes the rotor 3 and the stator 5 in the cavity, and the impeller 8 is provided for sucking air so that the vacuum cleaner can normally perform the vacuuming action. When the first rotating shaft 31 rotates, the first rotating shaft 31 drives the gear in the gear plate 7 to rotate, and the second rotating shaft rotatably connected to the gear plate 7 also rotates, and drives the impeller 8 on the second rotating shaft to rotate, so that the impeller 8 can play the role of vacuuming. The design of the air duct can make the hot air in the motor enter the impeller 8, and the impeller 8 discharges the hot air.

[0036] Continue to refer to Figure 5 In an implementable embodiment, along the extension direction of the first rotating shaft 31, the first rotating shaft 31 is also sequentially installed with a first axial flow fan 33, a rotor core 34 and a second axial flow fan 35, the magnetic steel 51 forms a circular ring structure, and forms a stator 5 with the housing 1, the first rotating shaft 31 passes through the circular ring structure formed by the magnetic steel 51, and the rotor core 34 is arranged in the circular ring structure formed by the magnetic steel 51.

[0037] In this embodiment, the housing 1 is used to accommodate the rotor 3 and the stator 5, wherein the commutator 32, the first axial flow fan 33, the rotor core 34, the second axial flow fan 35 and the gear plate 7 rotate together driven by the first rotating shaft 31. By adopting two axial flow fans, when the motor is running, the rotation of the first rotating shaft 31 can drive the first axial flow fan 33 and the second axial flow fan 35 to rotate simultaneously. The first rotating shaft 31 drives the first axial flow fan 33 to rotate, and the first axial flow fan 33 generates an axial cooling airflow and flows along the extension direction of the first rotating shaft 31, thereby taking away the heat generated by the motor. When flowing through the second axial flow fan 35, the cooling airflow has gradually become hot air. At this time, the second axial flow fan 35 throws the hot air out from the circumferential direction. 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. Moreover, the overall cooling process will not increase the vibration and noise of the motor, and low-noise heat dissipation is achieved. The dual axial fan design speeds up the air flow rate in the housing 1, 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 34 can be reduced, and the length of the rotor core 34 is shortened by 10 mm, which reduces the use of the rotor core 34 and the amount of copper wire, thereby reducing costs. The dual axial fan design is adopted, and both axial fans are installed in the housing 1. The first axial fan 33 and the second axial fan 35 are respectively fixed at both ends of the first rotating shaft 31, 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. In an implementable embodiment, two brush assemblies 4 are provided and symmetrically arranged on the rubber cover 2 .

[0038] In this embodiment, the carbon brush 43 can transfer the external current to the rotating rotor 3, 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 3 and measuring the positive and negative voltages of the rotor 3 to the ground. The brush assembly 4 also includes a lead 26, and two lead 26 are provided, which are respectively connected to the neutral and live wires of the external power supply, and each lead 26 is connected to a brush assembly 4.

[0039] The front end cover 6 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 on the front end cover 6, the first axial flow fan 33 blows the outside cold air into the motor through the ventilation hole 22.

[0040] In an implementable embodiment, the first axial flow fan 33 is provided with an air collecting cover on its exterior, and the air collecting cover is connected to the outer shell 1 .

[0041] In this embodiment, the axis of the wind collecting hood coincides with the axis of the first axial fan 33. The rotation of the first axial fan 33 will form a cooling airflow that flows axially along the motor shaft, and the wind collecting hood and the magnetic steel 51 can jointly form a guide channel inside the channel for guiding the cooling airflow generated by the first axial fan 33 to flow axially along the first rotating shaft 31, 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 31, taking away the heat generated by the motor. When flowing through the second axial fan 35, the second axial fan 35 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.

[0042] In one embodiment, a gap is provided between the inner wall of the first air collecting cover and the outer edge of the blades (the outermost edge of the blades) of the first axial flow fan 33 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 51. A clamping slot is provided on the mounting seat, and the clamping piece is inserted into the clamping slot.

[0043] 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 .

[0044] In this embodiment, a bearing 61 is provided at the connection between the first rotating shaft 31 and the gear plate 7. The first rotating shaft 31 passes through the bearing 61 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 6 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.

[0045] In an practicable embodiment, an impeller cover 9 is sleeved on the outside of the impeller 8, and the impeller cover 9 is fixedly connected to the housing 1. The impeller cover 9 is sleeved on the outer wall of the end cover.

[0046] In this embodiment, the impeller cover 9 can block dust and prevent external dust from falling directly onto the impeller 8.

[0047] 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, characterized in that: include: The shell has through holes extending through both ends thereof, and a plurality of positioning grooves are provided on the inner wall of the through hole near one end of the shell; A rubber cover, on the outer wall of which a positioning protrusion corresponding to the positioning groove is provided, the positioning protrusion is installed in the positioning groove so that the rubber cover is fixedly connected to the shell, and the rubber cover is also provided with a plurality of ventilation holes and a mounting hole located at the center of the rubber cover; The brush assembly comprises a carbon brush plate and a carbon brush, wherein the carbon brush plate is fixedly mounted on the rubber cover, a fixing piece is arranged on the carbon brush plate, and a fixing hole penetrating through both ends of the fixing piece is opened inside the fixing piece, and the carbon brush passes through one end of the fixing hole and extends out of the other end of the fixing hole and then is arranged toward the mounting hole; A rotor is disposed in the through hole, the rotor comprising a first rotating shaft and a commutator, the first rotating shaft partially passes through and extends out of the mounting hole, the commutator is sleeved on the first rotating shaft and disposed close to the mounting hole, and the carbon brush abuts against the commutator; A plurality of magnetic steels are arranged in the through hole, the plurality of magnetic steels are assembled into a circular ring structure, and the magnetic steels and the housing form a stator; The first rotating shaft passes through the magnetic steel.

2. The open motor according to claim 1, characterized in that The rubber cover 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 and one end of the carbon brush away from the commutator.

3. The open motor according to claim 1, characterized in that The housing comprises an arc-shaped first shell and a second shell, wherein the first shell and the second shell form a cylindrical shell with openings at both ends.

4. The open motor according to claim 1, characterized in that It also includes a front end cover, the outer side wall of the front end cover is provided with a first threaded hole, the outer shell is correspondingly provided with a second threaded hole, and the front end cover is fixedly connected to the outer shell by bolts.

5. The open motor according to claim 4, characterized in that A bearing is arranged at the center of the front end cover, and one end of the first rotating shaft extending out of the mounting hole is mounted in the bearing and rotatably connected to the bearing.

6. The open motor according to claim 1, characterized in that It also includes a gear plate, which is arranged in the through hole. The gear plate is rotatably connected to the other end of the first rotating shaft, and the outer wall of the gear plate abuts against the inner wall of the through hole.

7. The open motor according to claim 6, characterized in that An air duct is provided on the inner side wall of the through hole, and the air duct is arranged at the abutment position between the gear plate and the through hole.

8. The open motor according to claim 6, characterized in that It also includes a moving impeller, wherein a second rotating shaft is arranged inside the moving impeller, and the second rotating shaft is rotatably connected to the gear plate and driven to rotate by the gear plate.

9. The open motor according to claim 1, characterized in that Along the extension direction of the first rotating shaft, the first rotating shaft is also equipped with a first axial flow fan, a rotor core and a second axial flow fan in sequence. The first rotating shaft passes through the circular ring structure composed of the magnetic steel and the rotor core is arranged inside the circular ring structure composed of the magnetic steel.

10. The open motor according to claim 1, characterized in that The brush assemblies are provided with two and are symmetrically arranged on the rubber cover.

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