CN218684155U - Surface cleaning device with low working noise - Google Patents

Abstract

The utility model discloses a surface cleaning device that noise at work is little belongs to cleaning device technical field, which comprises a bod, drag the motor of wiping and transversely arranging in the organism, the motor includes the casing, stator module, the rotor subassembly, stator module is equipped with well cavity, the rotor subassembly includes, the rotor, pivot and axial fan blade, axial fan blade is located the cavity intracavity, be formed with the air passing channel between the lateral wall of cavity intracavity and the lateral wall of casing, the casing is equipped with fresh air inlet and exhaust vent, axial fan blade rotates and forms and flows through axial fan blade's heat dissipation air current along the axial of cavity intracavity after the fresh air inlet flowed in the air passing channel. Reduce the radial flow path length when the heat dissipation air current flows into well cavity from the fresh air inlet through crossing the wind channel to reduce the radial wadding intensity of flowing when the heat dissipation air current flows into well cavity, effectively restrain the discrete noise that axial fan blade produced because of radial wadding flows, thereby effectively reduce the noise at work of motor, be favorable to improving user's use and experience.

Description

Surface cleaning device with low working noise

Technical Field

The utility model relates to a cleaning device technical field especially relates to a surface cleaning device that noise at work is little.

Background

In recent years, some intelligent cleaning devices are more and more widely applied to daily life of people, and various cleaning devices bring great convenience to the life of people and improve the living experience of people. Some cleaning devices have a mop disposed on the bottom thereof, which can be driven by a motor to wipe the floor. A motor for driving a mopping piece generally adopts a single-shaft bidirectional output structure, and because the continuous operation time of the cleaning equipment is long, the load of the motor is large, and more heat can be generated in the motor during working. In order to avoid the situations of overhigh temperature inside the motor and overheating and failure of electronic elements, an axial flow fan is generally installed inside the motor, and partial heat inside the motor is taken away by airflow formed by rotation of the axial flow fan. Because the axial both ends of motor all link to each other with the reducing gear box for radiating fresh air inlet and exhaust vent can only set up on the lateral wall of motor, axial fan during operation can produce great discrete noise from the radial wadding flow of fresh air inlet inflow, and the motor side air inlet can increase the intensity that radial wadding flows, so leads to the noise at work of motor great, is unfavorable for improving user's use and experiences.

SUMMERY OF THE UTILITY MODEL

In order to solve the shortcoming and the deficiency that exist among the above-mentioned prior art, the utility model provides a little surface cleaning device of noise at work, the inside wind channel structure of reasonable improvement motor reduces the noise at work of motor.

In order to realize above-mentioned technical purpose, the utility model provides a pair of little surface cleaning device of noise at work, including the organism, locate the organism bottom drag to wipe the piece and transversely be used for the drive to drag the motor of wiping the piece in the organism, the motor includes the casing and locates stator module, rotor subassembly in the casing, stator module is equipped with the well cavity that is used for holding rotor subassembly, the rotor subassembly includes rotor and the pivot of combination together and locates the axial fan blade of rotor one end, and axial fan blade is located the cavity intracavity, is formed with the wind passageway between the lateral wall of well cavity and the lateral wall of casing, and the casing is equipped with the fresh air inlet with the wind passageway intercommunication near the one end of axial fan blade, is equipped with the exhaust vent with the wind passageway intercommunication keeping away from the one end of axial fan blade, and axial fan blade rotates to form and flows in the axial flow through the axial fan blade heat dissipation air current of well cavity behind the wind passageway from the fresh air inlet.

Preferably, the air passing channel comprises an air inlet channel communicated with the air inlet hole, and the width of the air inlet channel is increased from one end close to the air inlet hole to one end far away from the air inlet hole.

Preferably, the air passing channel comprises an air outlet channel communicated with the air outlet hole, and the width of the air outlet channel is reduced from one end far away from the air outlet hole to one end close to the air outlet hole.

Preferably, the inner diameters of the two ends of the hollow cavity are larger than the inner diameter of the middle part of the hollow cavity, and the air passing channel is arranged between the side walls of the two ends of the hollow cavity and the side wall of the shell.

Preferably, the rotor component comprises mixed flow fan blades arranged at the other end of the rotor, and the mixed flow fan blades are positioned in one end, far away from the axial flow fan blades, of the hollow cavity.

Preferably, one end of the hollow cavity is provided with a control panel which is arranged adjacent to the mixed flow fan blades, and the control panel is provided with an air passing opening communicated with the air passing channel, so that the heat dissipation airflow flowing through the hollow cavity flows into the air passing channel from the air passing opening and then flows out through the air outlet hole.

Preferably, stator module includes stator core and is used for erectting stator core's support, and well cavity is formed by the support, crosses between the lateral wall at support both ends and the lateral wall of casing the wind passageway is located.

Preferably, the rotor comprises a rotor core sleeved outside the rotating shaft and a magnetic ring sleeved outside the rotor core, and the magnetic ring is formed by injection molding by taking the rotating shaft and the rotor core as inserts.

Preferably, the rotor comprises a fan base body, the fan base body and the axial flow fan blades are integrally formed by injection molding by taking the rotating shaft, the rotor core and the magnetic ring as inserts, and the rotor core is provided with a through hole extending along the axial direction.

Preferably, the outer diameter of the fan base body is smaller than that of the magnetic ring, and the difference between the single-side outer diameters of the fan base body and the magnetic ring is not smaller than 2mm; and/or the end face of the fan base body facing the axial flow fan blade exceeds the axial flow fan blade by not less than 2mm.

After the technical scheme is adopted, the utility model has the advantages of as follows:

1. the utility model provides a surface cleaning device, stator module's cavity intracavity is located to rotor subassembly's axial fan blade, forms the wind passageway between the lateral wall of well cavity and the lateral wall of casing, and the casing sets up and crosses fresh air inlet, the exhaust vent of wind passageway intercommunication. When the axial fan blade rotates along with the rotating shaft, external air flows in from the air inlet hole, then flows into the hollow cavity through the air passing channel, then flows through the axial direction of the hollow cavity through the axial direction of the axial fan blade, forms heat dissipation air flow flowing through the interior of the motor, and the heat dissipation air flow flows out of the shell of the motor through the air passing channel and the air outlet hole, takes away heat in the interior of the motor and plays a role in heat dissipation. Meanwhile, the length of a radial flow path of the heat dissipation airflow flowing into the hollow cavity from the air inlet is reduced through the air passing channel, so that the radial flocculation flow strength of the heat dissipation airflow flowing into the hollow cavity is reduced, the discrete noise generated by the axial flow fan blade due to radial flocculation flow is effectively restrained, the working noise of the motor is effectively reduced, and the use experience of a user is improved.

2. The width of the air inlet channel is increased from one end close to the air inlet hole to one end far away from the air inlet hole, the air inlet channel is a gradually-changing channel, the speed of the heat dissipation air flow flowing into the air inlet channel through the air inlet hole is gradually reduced through the gradually-changing channel, the noise of the heat dissipation air flow flowing into the shell from the air inlet hole can be reduced, and the reduction of the working noise of the motor is facilitated.

3. The heat dissipation air current that flows through well cavity flows to the exhaust vent and flows out the motor from the exhaust vent through the air-out passageway, and the width of air-out passageway is from the one end of keeping away from the exhaust vent to the one end that is close to the exhaust vent increase, and the air-out passageway is width gradual change formula passageway, makes the heat dissipation air current from the speed of air-out passageway flow direction exhaust vent to become fast gradually through gradual change formula passageway, can reduce the noise when heat dissipation air current flows out the casing from the exhaust vent, is favorable to reducing the operating noise of motor.

4. The inner diameters of the two ends of the hollow cavity are larger than that of the middle part, the air passing channel is positioned between the side walls of the two ends of the hollow cavity and the side wall of the shell, and the inner diameter of the hollow cavity is reasonably arranged, so that the side wall of the hollow cavity can be combined with the side wall of the shell to form the air passing channel for air inlet and air outlet.

5. When the mixed flow fan blades rotate along with the rotating shaft, the heat dissipation airflow flows in from the radial direction of the mixed flow fan blades and flows out from the axial direction of the mixed flow fan blades, the flowing speed of the heat dissipation airflow in the hollow cavity is improved through the mixed flow fan blades, and the heat dissipation effect inside the motor is improved.

6. The heat dissipation airflow flowing through the hollow cavity flows to the air passing channel from the air passing opening of the control panel and then flows out of the motor through the air outlet hole, so that the heat dissipation airflow can flow through the surface of the control panel, the heat dissipation effect of the heat dissipation airflow on the control panel is improved, and the performance stability of the control panel is ensured.

7. The hollow cavity is formed by the support of the stator assembly, the air passing channel is arranged between the side walls at the two ends of the support and the side wall of the shell, the forming structure of the hollow cavity and the forming structure of the air passing channel are reasonably arranged, and the structural difficulty in the motor is reasonably reduced.

8. The magnetic ring is injection molded by taking the rotating shaft and the rotor core as inserts, the uniformity of the magnetic powder of the magnetic ring along the axial distribution can be improved, the consistency of the axial magnetic field of the magnetic ring can be improved, the rotation stability of the rotor component can be improved, and the reduction of the working noise of the motor is facilitated.

9. Fan base member and axial fan leaf use the rotor, rotor core and magnetic ring are integrative injection moulding of inserts, can improve the holistic precision of rotor subassembly, the rotor subassembly can not produce assembly error, the holistic initial dynamic balance nature of rotor subassembly is better, the later stage need not to carry out dynamic balance again and rectifies, the shortcoming of carrying out dynamic balance correction again after having solved motor later stage equipment fan very hardly has solved, can reduce the mechanical noise of motor because of the unbalanced production of rotor subassembly. The rotor core is provided with the through hole, so that the fan base body after injection molding can penetrate through the rotor core, and the integral structural strength of the rotor is improved.

10. When the magnetic ring is subsequently magnetized, the clamp takes the end face of the fan base body as a positioning face to clamp the rotor assembly. The outer diameter of the fan base body is smaller than the outer diameter of the magnetic ring, the difference of the single-side outer diameters of the magnetic ring and the fan base body is not smaller than 2mm, the clamp clamps the magnetic ring to enable the rotor assembly to keep fixed, and the clamp is prevented from touching the circumferential direction of the fan base body. The end face of the fan base body exceeds the axial flow fan blades by not less than 2mm, and the clamp is prevented from touching the axial flow fan blades.

Drawings

FIG. 1 is a schematic view of a surface cleaning apparatus according to an embodiment;

FIG. 2 is a top view of a motor and reduction gearbox of a surface cleaning apparatus according to an embodiment;

FIG. 3 is a transverse cross-sectional view of a motor and reduction gearbox of a surface cleaning apparatus according to an embodiment;

FIG. 4 is an internal block diagram of a motor of a surface cleaning apparatus according to an embodiment;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is an enlarged view at B in FIG. 4;

FIG. 7 is a diagram of a stator assembly of a motor in a surface cleaning apparatus according to one embodiment;

FIG. 8 is a block diagram of a rotor assembly of a motor in a surface cleaning apparatus according to one embodiment;

FIG. 9 is a half sectional view of a rotor assembly of a motor in a surface cleaning apparatus according to an embodiment;

FIG. 10 is a schematic view of a rotor core of a motor in a surface cleaning apparatus according to an embodiment.

In the figure, 100-machine body, 200-mopping piece, 210-rotating disc, 220-mop, 300-motor, 310-shell, 311-air inlet, 312-air outlet, 313-shell, 314-shell cover, 320-stator assembly, 321-stator iron core, 322-bracket, 3221-first edge, 3222-second edge, 3223-buckle, 323-hollow cavity, 323 a-first cavity, 323 b-second cavity, 323 c-middle cavity, 330-rotor assembly, 331-rotor, 3311-rotor iron core, 3312-magnetic ring, 3313-fan base body, 3314-through hole, 332-rotating shaft, 333-axial flow fan blade, 334-mixed flow fan blade, 340-air passing channel, 341-air inlet channel, 342-air outlet channel, 350-worm sleeve, 360-control panel, 361-air passing port, 400-reduction box and 410-output shaft.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used in an orientation or positional relationship relative to one another only as illustrated in the accompanying drawings and are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.

Example one

As shown in fig. 1 to 10, a surface cleaning device with low working noise provided by the embodiment of the present invention includes a body 100, a wiping member 200 disposed at the bottom of the body 100, and a motor 300 horizontally disposed in the body 100 for driving the wiping member 200, wherein the motor 300 includes a housing 310 and a stator assembly 320 and a rotor assembly 330 disposed in the housing 310, the stator assembly 320 is provided with a hollow cavity 323 for accommodating the rotor assembly 330. The rotor assembly 330 includes a rotor 331 and a rotating shaft 332 combined together, and an axial flow fan blade 333 disposed at one end of the rotor 331, the axial flow fan blade 333 is located in the hollow cavity 323, an air passage 340 is formed between a side wall of the hollow cavity 323 and a side wall of the housing 310, an air inlet 311 communicated with the air passage 340 is disposed at one end of the housing 310 close to the axial flow fan blade 333, an air outlet 312 communicated with the air passage 340 is disposed at one end far from the axial flow fan blade 333, and the axial flow fan blade 333 rotates to form a heat dissipation airflow flowing into the air passage 340 from the air inlet 311 and then flowing through the axial flow fan blade 333 along the axial direction of the hollow cavity 323.

When the axial fan blade rotates along with the rotating shaft, external air flows in from the air inlet hole, then flows into the hollow cavity through the air passing channel, then flows through the axial fan blade along the axial direction of the hollow cavity, forms heat dissipation airflow flowing through the inside of the motor, and the heat dissipation airflow flows out of the shell of the motor through the air passing channel and the air outlet hole, takes away heat inside the motor, and plays a role in heat dissipation. Meanwhile, the length of a radial flow path of the heat dissipation airflow flowing into the hollow cavity from the air inlet is reduced through the air passing channel, so that the radial flocculation flow strength of the heat dissipation airflow flowing into the hollow cavity is reduced, the discrete noise generated by the axial flow fan blade due to radial flocculation flow is effectively restrained, the working noise of the motor is effectively reduced, and the use experience of a user is improved.

In this embodiment, the self-moving cleaning robot shown in fig. 1 is taken as an example, two mopping units 200 are symmetrically arranged at the rear side of the bottom of the machine body 100, and each mopping unit 200 includes a rotating disc 210 and a mop 220 arranged at the bottom of the rotating disc 210. Referring to fig. 2 and 3, a reduction box 400 is further disposed in the body 100 and between the motor 300 and the mopping member 200, and two reduction boxes 400 are disposed at the left and right ends of the motor 300 respectively. The two axial ends of the rotating shaft 332 respectively extend into the two reduction boxes 400 and are sleeved with worm sleeves 350, each reduction box 400 comprises a box body, a worm wheel, an output shaft 410 and a gear transmission structure, the worm wheel is axially and vertically arranged in the box body and is meshed with the worm sleeves 350, the output shaft 410 is axially and vertically arranged in the box body, the lower end of the output shaft extends downwards out of the machine body 100, the gear transmission structure is arranged in the box body and is positioned between the worm wheel and the output shaft 410, the rotating disc 210 of the mopping piece 200 is connected with the lower end of the output shaft 410, the rotating shaft 332 of the motor 300 drives the mopping piece 200 to horizontally rotate through the worm sleeves 350, the worm wheel, the gear transmission structure and the output shaft 410, and therefore the mopping piece 200 can wipe the ground when the cleaning robot walks.

Referring to fig. 7, the stator assembly 320 includes a stator core 321 and a bracket 322, and the stator core 321 is fixed to the bracket 322. The hollow cavity 323 is formed by the bracket 322, and the air passing passage 340 is disposed between the sidewalls of both ends of the bracket 322 and the sidewall of the housing 310. The bracket 322 has a structure with a thin middle part and thick two ends, correspondingly, the inner diameters of the two ends of the hollow cavity 323 are larger than the inner diameter of the middle part, and the air passing passage 340 is arranged between the side walls of the two ends of the hollow cavity 323 and the side wall of the shell 310. In this embodiment, the two ends of the bracket 322 are respectively provided with a first ring edge 3221 and a second ring edge 3222 extending in the axial direction, the hollow cavity 323 includes a first cavity 323a surrounded by the first ring edge 3221, a second cavity 323b surrounded by the second ring edge 3222, and a middle cavity 323c located between the first cavity 323a and the second cavity 323b, the inner diameters of the first cavity 323a and the second cavity 323b are greater than the inner diameter of the middle cavity 323c, the axial flow fan blade 333 is disposed in the first cavity 323a, and the main body of the bracket 322 is provided with a ventilation hole through which a heat dissipation airflow flows.

Referring to fig. 4, the air passing channel 340 includes an air inlet channel 341 communicating with the air inlet hole 311 and an air outlet channel 342 communicating with the air outlet hole 312, and the heat dissipation air flowing through the hollow cavity 323 flows to the air outlet hole 312 through the air outlet channel 342 and flows out of the motor 300 through the air outlet hole 312. In this embodiment, the casing 310 of the motor 300 includes a casing 313 with an open end and a casing cover 314 disposed at the open end of the casing 313, the air inlet passage 341 is disposed between the first ring edge 3221 and the sidewall of the casing 313 and is provided with one ring, and the air outlet passage 342 is disposed between the second ring edge 3222 and the sidewall of the casing 313 and is provided with one ring. Specifically, the air passage 340 is closed toward one end of the stator core 321, and is open at an end opposite to the center of the stator core 321, and a plurality of air inlet holes 311 are arranged at intervals along the circumferential direction of the casing body 313 and correspond to the air inlet passage 341. The air outlet channel 342 is closed towards one end of the stator core 321, and is open towards one end of the stator core 321, and the air outlet holes 312 are arranged along the circumferential direction of the shell 313 at intervals and correspond to the air outlet channel 342.

Referring to fig. 5, the width of the air inlet channel 341 increases from the end close to the air inlet 311 to the end far from the air inlet 311, the air inlet channel 341 is a gradually changing channel, and the speed of the heat dissipating air flow flowing into the air inlet channel 341 through the air inlet 311 gradually decreases through the gradually changing channel, so that the noise of the heat dissipating air flow flowing into the casing 310 from the air inlet 311 can be reduced, which is beneficial to reducing the working noise of the motor 300. In this embodiment, the first ring is disposed along the circumferential outer surface of 3221 in an inclined manner, so that the width of the air inlet passage 341 gradually increases from the end close to the air inlet hole 311 to the end far from the air inlet hole 311.

With reference to fig. 6, the width of the air outlet channel 342 decreases from the end far away from the air outlet 312 to the end near the air outlet 312, the air outlet channel 342 is a gradually-changing channel, and the speed of the heat dissipating airflow flowing from the air outlet channel 342 to the air outlet 312 is gradually increased through the gradually-changing channel, so that the noise of the heat dissipating airflow flowing out of the housing 310 from the air outlet 312 can be reduced, which is beneficial to reducing the working noise of the motor 300. In this embodiment, the second ring is obliquely arranged along the circumferential outer surface 3222, so that the width of the air outlet channel 342 gradually decreases from the end far away from the air outlet 312 to the end close to the air outlet 312.

Referring to fig. 8, in order to improve the heat dissipation effect of the motor 300, the rotor assembly 330 includes mixed flow blades 334 disposed at the other end of the rotor 331, and the mixed flow blades 334 are located in the second cavity 323b of the hollow cavity 323. When the mixed flow blades 334 rotate along with the rotating shaft 332, the heat dissipation airflow flows in from the radial direction of the mixed flow blades 334 and flows out from the axial direction of the mixed flow blades 334, and the flow speed of the heat dissipation airflow in the hollow cavity 323 is increased through the mixed flow blades 334, so that the speed of the heat dissipation airflow for taking away the heat inside the motor 300 is increased.

Referring to fig. 4, a control plate 360 disposed adjacent to the mixed flow fan 334 is disposed in the second cavity 323b of the hollow cavity 323, the control plate 360 has an air passing opening 361 communicated with the air passing channel 340, and the heat dissipating air flows through the hollow cavity 323, then flows into the air outlet channel 342 from the air passing opening 361, and flows out through the air outlet 312. In this embodiment, a buckle 3223 is disposed on an end surface of the second ring edge 3222, the control board 360 is fixed to an end portion of the second ring edge 3222 by being matched with the buckle 3223, the rotating shaft 332 passes through the air opening 361, and an inner diameter of the air opening 361 is greater than an outer diameter of the rotating shaft 332.

Referring to fig. 8 and 9, the rotor 331 includes a rotor core 3311 sleeved outside the rotating shaft 332 and a magnetic ring 3312 sleeved outside the rotor core 3311, and the magnetic ring 3312 is formed by insert injection molding using the rotating shaft 332 and the rotor core 3311, so that uniformity of magnetic powder of the magnetic ring 3312 in the axial direction can be improved, uniformity of an axial magnetic field of the magnetic ring 3312 can be improved, rotational stability of the rotor assembly 330 can be improved, and noise of the motor 300 can be reduced. In this embodiment, the injection molding material of the magnet ring 3312 adopts the combination of ferrite magnetic powder and samarium iron nitrogen magnetic powder.

The rotor 331 further includes a fan base 3313, and the fan base 3313, the axial flow fan blade 333, and the mixed flow fan blade 334 are integrally injection molded by using the rotating shaft 332, the rotor core 3311, and the magnetic ring 3312 as inserts, so that the overall accuracy of the rotor assembly 330 can be improved, the rotor assembly 330 does not generate assembly errors, the overall initial dynamic balance of the rotor assembly 330 is better, dynamic balance correction is not required at a later stage, and mechanical noise generated by the motor 300 due to unbalance of the rotor assembly 330 can be reduced. In this embodiment, the molding material of the fan base 3313, the axial flow fan blade 333 and the mixed flow fan blade 334 is nylon with high strength. Referring to fig. 10, in order to improve the structural strength of the fan base 3313 and the structural stability of the entire rotor 331, the rotor core 3311 is provided with a through hole 3314 extending in the axial direction, and the injection molding material of the fan base 3313 can flow through the through hole 3314, so that the axial flow blades 333 and the mixed flow blades 334 can be integrally injection molded with the fan base 3313.

After the rotor 331 is molded, the magnetic ring 3312 needs to be magnetized, in order to avoid the clamp for clamping the rotor assembly 330 from touching the fan base 3313 or the axial fan blade 333, the outer diameter of the fan base 3313 is smaller than the outer diameter of the magnetic ring 3312, the single-side outer diameter difference Δ R between the two is not smaller than 2mm, and the axial height Δ h of the end surface of the fan base 3313 facing the axial fan blade 333 exceeds the axial fan blade 333 and is not smaller than 2mm. In the present embodiment, Δ R is set to 3mm, and Δ h is set to 5mm.

When the motor 300 drives the mop 200 to rotate horizontally through the reduction box 400, the axial flow fan blades 333 and the mixed flow fan blades 334 rotate along the rotating shaft 332 to form a heat dissipation airflow flowing in the direction shown by the dotted line in fig. 2, the heat dissipation airflow flows in from the air inlet 311, then flows into the hollow cavity 323 through the air inlet passage 341, then flows through the axial flow fan blades 333 along the axial direction of the hollow cavity 323 and flows to the mixed flow fan blades 334, then flows out of the hollow cavity 323 through the air outlet 361 and flows to the air outlet passage 342, finally flows out of the motor 300 through the air outlet 312, and the heat inside the motor 300 is driven by the heat dissipation airflow to reduce the internal temperature of the motor 300.

It is understood that other configurations of the cleaning robot can refer to the prior art, such as providing two side brushes symmetrically arranged at the front side of the bottom of the machine body 100, providing a dust suction assembly inside the cleaning robot, etc.

It will be appreciated that the surface cleaning apparatus to which the improved structure of the present embodiment is applied is not limited to the cleaning robot described above and shown in the drawings, and may be applied to other types of surface cleaning apparatuses such as a hand-held floor scrubber.

It will be appreciated that the mop cloth 220 may be removably secured to the bottom of the turntable 210 by means of velcro, etc.

It is understood that the worm housing 350 and the rotation shaft 332 may be integrally formed.

It is understood that the gear transmission structure may include a first gear and a second gear, the first gear is axially vertical, the second gear is sleeved on the top end of the output shaft 410, the worm gear is provided with a gear portion engaged with the first gear, the rotating shaft 332 drives the worm gear to horizontally rotate through the worm sleeve 350, the worm gear drives the output shaft 410 to horizontally rotate through the gear portion, the first gear and the second gear, and the output shaft 410 drives the dragging member 200 to horizontally rotate. Of course, the specific structure of the gear transmission structure is not limited to this, and other reasonable transmission structures can be adopted.

It is understood that the circumferential outer surface of the first ring 3221 may be curved such that the width of the air inlet path 341 increases from the end near the air inlet hole 311 to the end far from the air inlet hole 311.

It will be appreciated that the circumferential outer surface of the first ring 3221 may also be disposed parallel to the inner surface of the housing body 313.

It is understood that the circumferential outer surface of the second ring 3222 may be curved to decrease the width of the air outlet channel 342 from the end far away from the air outlet 312 to the end near the air outlet 312.

It will be appreciated that the circumferential outer surface of the second turn 3222 may also be disposed parallel to the inner surface of the housing body 313.

It can be understood that the mixed flow fan 334 can be eliminated on the premise of meeting the heat dissipation requirement.

It can be understood that the injection molding material of the magnet ring 3312 may also be pure samarium-iron-nitrogen magnetic powder, ru-iron-boron magnetic powder, or other materials meeting the requirements.

It is understood that the injection molding material of the fan base 3313, the axial flow fan blades 333 and the mixed flow fan blades 334 may also be high strength ABS or other materials meeting the requirement.

It is understood that Δ R may be set to other reasonable sizes such as 2mm, 2.5mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.

It is understood that Δ h may be set to other reasonable sizes such as 2mm, 2.5mm, 3.5mm, 4mm, 4.5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, etc.

In addition to the above preferred embodiments, the present invention has other embodiments, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope defined by the appended claims.

Claims (10)

1. The utility model provides a surface cleaning device that noise of operation is little, includes the organism, locate the organism bottom drag the piece of wiping and transversely be used for the drive to drag the motor of wiping the piece in the organism, the motor includes the casing and locates stator module, rotor subassembly in the casing, stator module is equipped with the well cavity that is used for the holding rotor subassembly, a serial communication port, the rotor subassembly includes rotor and the pivot of combining together and locates the axial fan blade of rotor one end, axial fan blade is located the cavity intracavity, is formed with between the lateral wall of well cavity and the lateral wall of casing and crosses the wind passageway, the casing is equipped with the inlet air with crossing wind passageway intercommunication in the one end that is close to axial fan blade, is equipped with the exhaust vent with crossing wind passageway intercommunication in the one end of keeping away from axial fan blade, axial fan blade rotates and forms the heat dissipation air current that flows through axial fan blade along the cavity after flowing into wind passageway from the inlet air.

2. A surface cleaning apparatus having reduced operational noise as set forth in claim 1 wherein said air passage includes an air inlet passage communicating with the air inlet opening, the air inlet passage increasing in width from an end adjacent the air inlet opening to an end remote from the air inlet opening.

3. The surface cleaning device with low working noise as claimed in claim 1, wherein the air passing channel comprises an air outlet channel communicated with the air outlet, and the width of the air outlet channel decreases from the end far away from the air outlet to the end near the air outlet.

4. The surface cleaning device with low working noise of claim 1, wherein the inner diameters of the two ends of the hollow cavity are larger than the inner diameter of the middle part, and the air passing channel is arranged between the side walls of the two ends of the hollow cavity and the side wall of the shell.

5. The device of claim 4, wherein the rotor assembly comprises mixed flow blades at the other end of the rotor, the mixed flow blades being located in an end of the hollow chamber remote from the axial flow blades.

6. The surface cleaning device with low operating noise as claimed in claim 5, wherein the hollow chamber has a control plate disposed adjacent to the mixed flow fan blades at one end thereof, the control plate having an air passing opening communicating with the air passing passage, so that the heat dissipating air flowing through the hollow chamber flows into the air passing passage from the air passing opening and then flows out through the air outlet.

7. The surface cleaning device with low working noise according to any one of claims 1 to 6, wherein the stator assembly comprises a stator core and a bracket for erecting the stator core, the hollow cavity is formed by the bracket, and the air passing channel is arranged between the side walls at two ends of the bracket and the side wall of the shell.

8. The surface cleaning device with low operating noise as claimed in any one of claims 1 to 6, wherein the rotor includes a rotor core sleeved outside the rotating shaft and a magnetic ring sleeved outside the rotor core, and the magnetic ring is formed by insert injection molding of the rotating shaft and the rotor core.

9. The surface cleaning apparatus as claimed in claim 8, wherein the rotor includes a fan base, the fan base and the axial fan blades are integrally injection molded by inserting the rotary shaft, a rotor core and a magnetic ring, and the rotor core is provided with a through hole extending in the axial direction.

10. The surface cleaning device with low operating noise as claimed in claim 9, wherein the outer diameter of the fan base is smaller than that of the magnetic ring, and the difference between the single outer diameters of the two is not less than 2mm; and/or the end face of the fan base body facing the axial flow fan blade exceeds the axial flow fan blade by not less than 2mm.

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