Fan and cleaning robot

Abstract

The utility model relates to the technical field of air supply equipment, and discloses a fan and a cleaning robot, the fan comprises a shell, an impeller, an output shaft and a motor, the shell comprises a shell and a convex ring convexly arranged on one side of the shell, the shell is provided with a mounting cavity, the convex ring is provided with a mounting hole, the mounting cavity is communicated with the mounting hole, and the impeller is arranged in the mounting cavity; the output shaft is inserted into the mounting hole and is in transmission connection with the impeller; the motor is installed on the peripheral side of the convex ring, is in transmission connection with the output shaft and can drive the output shaft to rotate so that the output shaft can drive the impeller to rotate. In the embodiment, the motor is mounted on the peripheral side of the connecting ring and is positioned on the outer side of the shell, and water or water vapor in the mounting cavity is separated from the motor through the outer wall of the mounting cavity and the connecting ring, so that the water vapor in the mounting cavity is prevented from flowing to the motor, elements and a circuit board in the motor are prevented from being damaged by water immersion, and the use performance of the motor is favorably guaranteed; and the service lives of the motor and the fan are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air supply equipment, in particular to a fan and a cleaning robot. Background Art

[0002] In recent years, with the continuous improvement of the economic level, people's requirements for the home environment have become higher and higher. As a benefit for the lazy, the application of floor cleaning robots in families has gradually become common. The floor cleaning robot can automatically complete the floor cleaning operation, reducing the cleaning work of users.

[0003] The cleaning robot usually has structures such as a fan and a dust box inside. It generates negative pressure through a high-speed rotating fan, and under the action of the negative pressure, it sucks dust, debris and other impurities on the ground and stores them in the dust box, so as to realize the automatic floor cleaning operation.

[0004] However, when the cleaning robot is applied to an environment with high air humidity or there is liquid on the ground, the suction generated by the fan will draw water vapor and even liquid water into its internal structure, which is likely to cause abnormal noise or damage to the internal components of the fan, affecting the use performance and service life of the fan. Summary of the Utility Model

[0005] The embodiments of the utility model aim to provide a fan and a cleaning robot to solve the technical problem that the fan is easily damaged by immersion in the prior art.

[0006] The embodiments of the utility model adopt the following technical solutions to solve its technical problems: A fan is provided, including:

[0007] A housing, including a shell and a connecting ring protruding from one side of the shell. The shell has an installation cavity, and the connecting ring has a connecting hole, and the installation cavity is communicated with the connecting hole;

[0008] An impeller, which is arranged in the installation cavity;

[0009] An output shaft, which passes through the connecting hole and is in transmission connection with the impeller;

[0010] A motor, which is installed on the outer peripheral side of the connecting ring. The motor is in transmission connection with the output shaft, and the motor can drive the output shaft to rotate, so that the output shaft drives the impeller to rotate.

[0011] In some embodiments, the motor includes a rotor assembly and a stator assembly;

[0012] The rotor assembly includes a motor housing and a magnetic ring arranged on the inner wall of the motor housing. The motor housing is located at the end of the connecting ring away from the shell, and the output shaft is fixedly matched with the motor housing;

[0013] The stator assembly is fixedly fitted with the outer wall of the connecting ring, and the stator assembly is located inside the motor housing. The stator assembly can cooperate with the magnetic ring to drive the motor housing and the output shaft to rotate.

[0014] In some embodiments, the blower further includes a bearing and a first sealing cover;

[0015] The bearing is installed in the connecting hole, and the output shaft passes through the bearing;

[0016] The first sealing cover is sleeved on the output shaft and is located in the installation cavity. The first sealing cover has a first sealing portion, and a second sealing portion is provided on the inner bottom wall of the installation cavity. The first sealing portion is in sealing cooperation with the second sealing portion.

[0017] In some embodiments, the first sealing portion is a sealing ring, and the second sealing portion is an annular groove; or the first sealing portion is an annular groove, and the second sealing portion is a sealing ring.

[0018] In some embodiments, the blower further includes a second sealing cover. The second sealing cover is sleeved on the output shaft, and the second sealing cover is located between the first sealing cover and the bearing;

[0019] A third sealing portion is provided on the side of the first sealing cover facing the second sealing cover, and a fourth sealing portion is provided on the side of the second sealing cover facing the first sealing cover. The third sealing portion is in sealing cooperation with the fourth sealing portion.

[0020] In some embodiments, the third sealing portion is a sealing ring, and the fourth sealing portion is an annular groove; or the third sealing portion is an annular groove, and the fourth sealing portion is a sealing ring.

[0021] In some embodiments, the first sealing cover is in interference fit with the output shaft, the second sealing cover is in clearance fit with the output shaft, and the second sealing cover is in sealing cooperation with the output shaft;

[0022] Or, the second sealing cover is in interference fit with the output shaft, the first sealing cover is in clearance fit with the output shaft, and the first sealing cover is in sealing cooperation with the output shaft.

[0023] In some embodiments, there is an installation gap between the impeller and the inner bottom wall of the installation cavity. A flow blocking ring is arranged in the installation gap, and the flow blocking ring can prevent the airflow in the installation gap from flowing from the outside of the flow blocking ring to the inside of the flow blocking ring.

[0024] In some embodiments, the housing includes an upper housing and a lower housing. The upper housing and the lower housing enclose to form the installation cavity, and the connecting ring is disposed on a side of the lower housing facing away from the upper housing.

[0025] One of the upper housing or the lower housing is provided with a clamping groove, and the other is provided with a convex ring. The convex ring is disposed in the clamping groove and is in sealing cooperation with the clamping groove.

[0026] The embodiment of the present utility model also adopts the following technical solution to solve its technical problems: providing a cleaning robot, including the blower as described in any one of the above embodiments.

[0027] Compared with the prior art, in the blower and the cleaning robot provided by the embodiment of the present utility model, since the motor is installed on the outer peripheral side of the connecting ring and is located outside the housing, the water vapor in the installation cavity is separated from the motor by the outer wall of the installation cavity and the connecting ring, blocking the water vapor in the installation cavity from flowing to the motor, avoiding the immersion damage of the internal components of the motor, helping to ensure the use performance of the motor, and prolonging the service life of the motor and the blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are illustrated by way of example in the accompanying drawings, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a proportional limitation.

[0029] Figure 1 is a schematic three-dimensional structure diagram of a blower provided by one embodiment of the present utility model;

[0030] Figure 2 is a schematic cross-sectional structure diagram of the blower in one embodiment of the present utility model;

[0031] Figure 3 is an exploded structure diagram of the blower in one embodiment of the present utility model;

[0032] Figure 4 is a schematic three-dimensional structure diagram of the lower housing in one embodiment of the present utility model;

[0033] Figure 5 is Figure 2 a partial enlarged view of part A in;

[0034] Figure 6 is a schematic cross-sectional structure diagram of the blower in another embodiment of the present utility model;

[0035] Figure 7 is Figure 6 a partial enlarged view of part B in;

[0036] Figure 8 isFigure 2 Partial enlarged view at position C;

[0037] Figure 9 It is a schematic three - dimensional structure diagram of a cleaning robot in an embodiment of the present utility model.

[0038] Reference numerals in the drawings of the embodiments of the present utility model:

[0039] 100, blower; 10, housing; 101, air inlet; 102, air outlet; 11, housing body;

[0040] 110, installation cavity; 111, upper shell; 1110, convex ring; 112, lower shell; 1120, clamping groove;

[0041] 113, second sealing part; 114, installation gap; 115, flow - blocking ring; 12, connecting ring;

[0042] 120, connecting hole; 20, impeller; 30, output shaft; 40, motor; 41, rotor assembly;

[0043] 410, motor housing; 411, magnetic ring; 42, stator assembly; 420, iron core; 421, winding coil; 50, circuit board; 60, dust - proof cover; 61, balance ring; 70, bearing; 80, first sealing cover; 81, first sealing part; 82, third sealing part; 90, second sealing cover; 91, fourth sealing part; 200, cleaning robot. Detailed implementation manners

[0044] For the convenience of understanding the present utility model, the following combines the drawings and specific embodiments to describe the present utility model in more detail. It should be noted that when an element is expressed as "connected" to another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model.

[0046] The following will combine the attachedFigures 1 to 9 The blower and the cleaning robot provided by the embodiments of the present utility model will be described in detail.

[0047] Please refer to Figures 1 to 4 , Figure 1 which is a schematic three-dimensional structure diagram of a blower 100 provided by the embodiments of the present utility model, Figure 2 which is a schematic cross-sectional structure diagram of the blower 100, Figure 3 which is a schematic exploded structure diagram of the blower 100, Figure 4 which is a schematic three-dimensional structure diagram of the lower housing 112.

[0048] The embodiments of the present utility model provide a blower 100, which includes a housing 10, an impeller 20, an output shaft 30, and a motor 40. The housing 10 includes a housing body 11 and a connecting ring 12 protruding from one side of the housing body 11. The housing body 11 has an installation cavity 110, and the connecting ring 12 has a connecting hole 120. The installation cavity 110 is communicated with the connecting hole 120. The impeller 20 is disposed in the installation cavity 110. The output shaft 30 is inserted into the connecting hole 120 and is in transmission connection with the impeller 20. The motor 40 is installed on the outer peripheral side of the connecting ring 12. The motor 40 is in transmission connection with the output shaft 30. The motor 40 can drive the output shaft 30 to rotate, so that the output shaft 30 drives the impeller 20 to rotate.

[0049] Specifically, the blower 100 in the embodiments of the present utility model can be applied to a cleaning robot. In addition, the blower 100 can also be applied to other electrical devices. For example, the blower 100 can also be applied to household appliances such as an air purifier or an air conditioner.

[0050] The housing 10 is used to carry the impeller 20 and the motor 40. The housing 10 can adopt a volute structure and has a generally spiral outer shape. The housing 10 is provided with an air inlet 101 and an air outlet 102, and both the air inlet 101 and the air outlet 102 are communicated with the installation cavity 110. The housing 10 includes a housing body 11 and a connecting ring 12. The interior of the housing body 11 is hollow to form an installation cavity 110 for receiving the impeller 20. The connecting ring 12 protrudes from the lower end of the housing body 11 and is located outside the housing body 11.

[0051] The connecting ring 12 can be in a hollow cylindrical structure and form a connecting hole 120. The connecting hole 120 is communicated with the installation cavity 110. The output shaft 30 can be disposed in the connecting hole 120. One end of the output shaft 30 extends into the installation cavity 110 and is fixedly fitted with the impeller 20 in the installation cavity 110. Thus, when the output shaft 30 rotates, the impeller 20 also rotates accordingly.

[0052] The motor 40 is installed on the outer peripheral side of the connecting ring 12 and is in transmission cooperation with the output shaft 30 inside the connecting ring 12. The motor 40 can provide the driving force for the rotation of the output shaft 30. After the motor 40 is started, the motor 40 can drive the output shaft 30 to rotate, causing the impeller 20 to rotate accordingly. Under the rotation of the impeller 20, the air flow is conveyed from the air inlet 101 to the installation cavity 110 and then from the installation cavity 110 to the air outlet 102.

[0053] It can be understood that during the process of the air flow being conveyed from the air inlet 101 to the installation cavity 110, inevitably, part of the water vapor will enter the installation cavity 110.

[0054] In this embodiment, since the motor 40 is installed on the outer peripheral side of the connecting ring 12 and is located outside the housing 11, the water vapor in the installation cavity 110 is separated from the motor 40 by the outer wall of the installation cavity 110 and the connecting ring 12, blocking the water or water vapor in the installation cavity 110 from flowing to the motor 40, avoiding the immersion and damage of the internal components and circuit board of the motor 40, helping to ensure the performance of the motor 40 and extending the service life of the motor 40 and the circuit board.

[0055] In some embodiments, the motor 40 includes a rotor assembly 41 and a stator assembly 42. The rotor assembly 41 includes a motor housing 410 and a magnetic ring 411 provided on the inner wall of the motor housing 410. The motor housing 410 is located at the end of the connecting ring 12 away from the housing 11. The output shaft 30 is fixedly fitted with the motor housing 410. The stator assembly 42 is fixedly fitted with the outer wall of the connecting ring 12 and is located inside the motor housing 410. The stator assembly 42 can cooperate with the magnetic ring 411 to drive the motor housing 410 and the output shaft 30 to rotate.

[0056] As Figure 2 and Figure 3 shown, the rotor assembly 41 includes a motor housing 410 and a magnetic ring 411. The motor housing 410 is in a substantially U-shaped housing 11 and is fixedly connected to the bottom end of the output shaft 30. The magnetic ring 411 is in a circular ring structure and is fixedly connected to the inner side wall of the motor housing 410. Optionally, the magnetic ring 411 can be installed on the inner side wall of the motor housing 410 by means of bonding, threaded connection, snap connection, etc.

[0057] Optionally, a shaft hole is provided on the motor housing 410. The end of the output shaft 30 facing the motor housing 410 is in interference fit with the shaft hole to achieve the fixed assembly of the output shaft 30 and the motor housing 410. In addition, the output shaft 30 and the motor housing 410 can also be fixedly connected by other means, such as using fasteners or welding to achieve the fixed connection between the two.

[0058] The stator assembly 42 is fixedly installed on the outer wall of the connecting ring 12. Optionally, the stator assembly 42 can be press-fitted with the outer side wall of the connecting ring 12 to achieve fixed assembly between the two, which can reduce the use of additional components and simplify the assembly process.

[0059] The stator assembly 42 includes structures such as an iron core 420 and a winding coil 421. The iron core 420 can be pressed into the connecting ring 12 to achieve fixed connection with the connecting ring 12. The winding coil 421 is embedded in the iron core 420. When the winding coil 421 is energized, a rotating magnetic field will be generated around the iron core 420. The magnetic ring 411 will rotate under the action of the rotating magnetic field, and then drive the motor housing 410, the output shaft 30, and the impeller 20 to rotate accordingly.

[0060] As Figure 2 and Figure 3 shown, in some embodiments, the fan 100 further includes a circuit board 50, which can be a printed circuit board 50. The circuit board 50 can be electrically connected to the winding coil 421 of the stator assembly 42. The conduction and disconnection of the winding coil 421 can be controlled through the circuit board 50.

[0061] In some embodiments, the circuit board 50 is located outside the housing 11 and is installed at the bottom of the housing 11. For example, the circuit board 50 can be fixed to the bottom of the housing 11 through fasteners such as screws. Since the circuit board 50 is installed on the outer peripheral side of the connecting ring 12 and is located outside the housing 11, the water vapor in the installation cavity 110 is separated from the circuit board 50 by the outer wall of the installation cavity 110 and the connecting ring 12, blocking the water vapor in the installation cavity 110 from flowing to the circuit board 50 and avoiding damage to the circuit board 50 due to immersion in water.

[0062] In some embodiments, the fan 100 further includes a dust cover 60 and a balance ring 61. The dust cover 60 is provided on the side of the motor housing 410 facing away from the housing 11 of the fan 100, and the balance ring 61 is provided at the bottom end of the motor housing 410. The dust cover 60 can prevent the balance ring 61 at the tail end of the motor housing 410 from rotating and causing harm to personnel. Optionally, the dust cover 60 can be fixed to the housing 11 of the fan 100 through fasteners such as screws and bolts.

[0063] In some embodiments, the housing 11 includes an upper housing 111 and a lower housing 112. The upper housing 111 and the lower housing 112 enclose to form an installation cavity 110. Among them, the connecting ring 12 can be connected to the central position at the bottom of the lower housing 112. Optionally, the connecting ring 12 and the lower housing 112 are integrally formed to ensure its structural strength.

[0064] Please refer to Figures 5 to 7 , Figure 5 is Figure 2 the partial enlarged view of the A position in Figure 6It is a schematic cross-sectional structure diagram of the blower 100 in another embodiment of the present utility model. Figure 7 It is Figure 6 The partial enlarged view at position B in

[0065] In some embodiments, the blower 100 further includes a bearing 70 and a first sealing cover 80. The bearing 70 is installed in the connection hole 120, the output shaft 30 passes through the bearing 70, the first sealing cover 80 is sleeved on the output shaft 30 and is located in the installation cavity 110. The first sealing cover 80 has a first sealing portion 81, and the inner bottom wall of the installation cavity 110 is provided with a second sealing portion 113. The first sealing portion 81 and the second sealing portion 113 are in sealing cooperation.

[0066] As Figure 5 shown, the bearing 70 is installed in the connection hole 120, the outer ring of the bearing 70 is fixedly connected to the hole wall of the connection hole 120, the output shaft 30 passes through the inner ring of the bearing 70. By providing the bearing 70, the rotation of the output shaft 30 in the connection hole 120 is made smoother.

[0067] There may be one or more bearings 70. Optionally, two bearings 70 are provided in the connection hole 120. The two bearings 70 can simultaneously support the output shaft 30, making the force on the bearing 70 more balanced and the rotation more stable. Optionally, the bearing 70 can be a ball bearing 70, which helps to reduce rotational friction and support radial and axial loads.

[0068] The first sealing cover 80 can be a circular cover-like structure. The first sealing cover 80 is located in the installation cavity 110. More specifically, the first sealing cover 80 is arranged between the impeller 20 and the lower housing 112 and covers the upper position of the bearing 70. A first through hole is provided in the middle of the first sealing cover 80, and the output shaft 30 passes through the first through hole. The first sealing cover 80 has a first sealing portion 81. The first sealing portion 81 is arranged at the periphery of the first sealing cover 80. The lower housing 112 has a second sealing portion 113. The second sealing portion 113 corresponds to the position of the first sealing portion 81. Through the sealing connection between the first sealing portion 81 and the second sealing portion 113, the sealing connection between the first sealing cover 80 and the lower housing 112 is realized.

[0069] In this embodiment, by providing the first sealing cover 80 above the bearing 70 and making the first sealing portion 81 on the first sealing cover 80 be in sealing connection with the second sealing portion 113 on the lower housing 112, it can effectively prevent water or water vapor in the air flow from flowing to the bearing 70 and rusting the bearing 70, playing a waterproof protection role for the bearing 70 and extending the service life of the bearing 70 and the blower 100.

[0070] In some embodiments, the first sealing portion 81 is a sealing ring, and the second sealing portion 113 is an annular groove. Through the sealing fit between the sealing ring and the annular groove, the purpose of waterproof protection is achieved. Optionally, the first sealing portion 81 and the second sealing portion 113 are in clearance fit, and waterproof grease is filled in the assembly clearance between the first sealing portion 81 and the second sealing portion 113 to achieve a sealed connection therebetween. It can be understood that while achieving the sealed fit between the first sealing portion 81 and the second sealing portion 113, this method also allows relative rotation between the first sealing portion 81 and the second sealing portion 113, that is, allows the first sealing cover 80 to rotate relative to the housing 11.

[0071] In other embodiments, it may also be that the second sealing portion 113 is a sealing ring and the first sealing portion 81 is an annular groove, which can achieve the effect of sealed assembly between the first sealing portion 81 and the second sealing portion 113.

[0072] In some embodiments, the first sealing cover 80 can be in interference fit with the output shaft 30 (see Figure 5 ), and the first sealing portion 81 and the second sealing portion 113 are in clearance fit. After the fan 100 is started, the first sealing cover 80 can rotate together with the output shaft 30. Through the interference fit between the first sealing cover 80 and the output shaft 30, the clearance between the output shaft 30 and the first sealing cover 80 can be sealed to achieve a better sealing effect and prevent water or water vapor in the installation cavity 110 from flowing to the bearing 70 through the clearance between the output shaft 30 and the first sealing cover 80. Optionally, the upper surface of the first sealing cover 80 abuts against the lower surface of the impeller 20, which can further prevent water or water vapor from flowing to the bearing 70.

[0073] In other embodiments, the first sealing cover 80 can also be in clearance fit with the output shaft 30. In the case of clearance fit between the first sealing cover 80 and the output shaft 30, the first sealing cover 80 can be fixed to the housing 11 by means such as bonding or threaded connection to prevent the first sealing cover 80 from shaking. In addition, the first sealing portion 81 and the second sealing portion 113 can also be configured to be in interference fit to fix the first sealing cover 80 on the housing 11.

[0074] In some embodiments, the fan 100 further includes a second sealing cover 90. The second sealing cover 90 is sleeved on the output shaft 30, and the second sealing cover 90 is located between the first sealing cover 80 and the bearing 70; a third sealing portion 82 is provided on the side of the first sealing cover 80 facing the second sealing cover 90, and a fourth sealing portion 91 is provided on the side of the second sealing cover 90 facing the first sealing cover 80. The third sealing portion 82 and the fourth sealing portion 91 are in sealed connection.

[0075] As Figure 5As shown, the second sealing cover 90 is located between the bearing 70 and the first sealing cover 80 and on the inner side of the first sealing cover 80. The second sealing cover 90 has a generally cap-like structure. The second sealing cover 90 is arranged in a groove formed by the first sealing cover 80, the output shaft 30, the pore wall of the connection hole 120, and the bearing 70. Optionally, the groove is filled with waterproof grease to seal the assembly gaps between the components.

[0076] A second through hole is provided in the middle of the second sealing cover 90, and the output shaft 30 passes through the second through hole. The first sealing cover 80 and the second sealing cover 90 are respectively provided with a third sealing portion 82 and a fourth sealing portion 91. The positions of the third sealing portion 82 and the fourth sealing portion 91 correspond to each other. Through the sealing connection between the third sealing portion 82 and the fourth sealing portion 91, the waterproof protection effect on the bearing 70 can be further improved.

[0077] Specifically, in this embodiment, through the sealing cooperation between the first sealing portion 81 and the second sealing portion 113, and the sealing cooperation between the third sealing portion 82 and the fourth sealing portion 91, two waterproof sealing structures are formed, which can achieve a double-layer waterproof sealing effect and prevent the bearing 70 from being corroded by water vapor.

[0078] In some embodiments, the third sealing portion 82 is an annular groove, and the fourth sealing portion 91 is a sealing ring. Through the sealing cooperation between the sealing ring and the annular groove, the purpose of waterproof protection is achieved. Optionally, the third sealing portion 82 and the fourth sealing portion 91 are in clearance fit, and the assembly gap between the third sealing portion 82 and the fourth sealing portion 91 is filled with waterproof grease to achieve the sealing connection between the two. It can be understood that while realizing the sealing cooperation between the third sealing portion 82 and the fourth sealing portion 91, this method also allows relative rotation between the third sealing portion 82 and the fourth sealing portion 91, that is, allows relative rotation between the first sealing cover 80 and the second sealing cover 90.

[0079] In other embodiments, it can also be that the third sealing portion 82 is a sealing ring and the fourth sealing portion 91 is an annular groove, which can also achieve the effect of sealing assembly between the third sealing portion 82 and the fourth sealing portion 91.

[0080] In some embodiments, the second sealing cover 90 can be in interference fit with the output shaft 30. After the fan 100 is started, the second sealing cover 90 can rotate together with the output shaft 30. Through the interference fit between the second sealing cover 90 and the output shaft 30, the gap between the output shaft 30 and the second sealing cover 90 can be sealed to achieve a better sealing effect and prevent water or water vapor in the installation cavity 110 from flowing to the bearing 70 through the gap between the output shaft 30 and the second sealing cover 90.

[0081] In some other embodiments, the second sealing cover 90 can also be in clearance fit with the output shaft 30. In the case where the second sealing cover 90 is in clearance fit with the output shaft 30, the second sealing cover 90 can be pressed into the connection hole 120 and abutted against the outer ring of the bearing 70 to fix the second sealing cover 90 and prevent the second sealing cover 90 from shaking during the use of the blower 100.

[0082] In some embodiments, both the first sealing cover 80 and the second sealing cover 90 can be in interference fit with the output shaft 30 to achieve a better waterproof sealing effect.

[0083] In some embodiments, both the first sealing cover 80 and the second sealing cover 90 can also be in clearance fit with the output shaft 30, and waterproof grease is respectively filled in the clearance between the first sealing cover 80 and the output shaft 30 and the clearance between the second sealing cover 90 and the output shaft 30.

[0084] As Figure 5 shown, in some embodiments, the first sealing cover 80 is in interference fit with the output shaft 30, the second sealing cover 90 is in clearance fit with the output shaft 30, and the second sealing cover 90 is sealingly connected to the output shaft 30.

[0085] The interference fit between the first sealing cover 80 and the output shaft 30 can ensure a good waterproof sealing effect between the first sealing cover 80 and the output shaft 30, and prevent water or water vapor from invading the bearing 70 to the greatest extent. The clearance fit between the second sealing cover 90 and the output shaft 30 has a lower assembly manufacturing cost, which can reduce the manufacturing and assembly cost.

[0086] Waterproof grease can be filled between the second sealing cover 90 and the output shaft 30 to achieve a sealed connection between the second sealing cover 90 and the output shaft 30. Thus, the sealing fit between the first sealing portion 81 and the second sealing portion 113, the sealing fit between the third sealing portion 82 and the fourth sealing portion 91, and the sealing fit between the second sealing cover 90 and the output shaft 30 form a three - layer waterproof sealing structure, which can avoid the bearing 70 from being corroded by water vapor to the greatest extent.

[0087] As Figure 5 shown, when the first sealing cover 80 is in interference fit with the output shaft 30 and the second sealing cover 90 is in clearance fit with the output shaft 30, the radial fit clearance between the first sealing portion 81 and the second sealing portion 113 is δ1, the axial fit clearance between the third sealing portion 82 and the fourth sealing portion 91 is δ2, and the radial fit clearance between the second sealing cover 90 and the output shaft 30 is δ3. Optionally, δ2 = (1.2 - 1.6) * δ1, δ3 = (0.3 - 0.6) * δ1.

[0088] As Figure 7As shown, in some other embodiments, the second sealing cover 90 may also be in interference fit with the output shaft 30, and the first sealing cover 80 may be in clearance fit with the output shaft 30. Moreover, the first sealing cover 80 is sealingly connected to the output shaft 30, and the above effects can also be achieved.

[0089] Optionally, when the second sealing cover 90 is in interference fit with the output shaft 30, the second sealing cover 90 is in clearance fit with the inner wall of the connection hole 120 to allow the second sealing cover 90 to rotate relative to the housing 11. A waterproof grease is filled between the second sealing cover 90 and the inner wall of the connection hole 120 to further protect the bearing 70 from corrosion by water vapor.

[0090] As Figure 7 shown, when the second sealing cover 90 is in interference fit with the output shaft 30 and the first sealing cover 80 is in clearance fit with the output shaft 30, the radial clearance between the first sealing cover 80 and the output shaft 30 is δ4, the axial clearance between the third sealing portion 82 and the fourth sealing portion 91 is δ5, and the radial clearance between the second sealing cover 90 and the inner wall of the connection hole 120 is δ6. Optionally, δ5 = (1.6 - 3) * δ4 and δ6 = (1.5 - 2) * δ4.

[0091] In this embodiment, one of the first sealing cover 80 and the second sealing cover 90 is configured to be in interference fit with the output shaft 30 to ensure the waterproof sealing effect. The other is configured to be in clearance fit with the output shaft 30 to reduce the manufacturing and assembly costs. Thus, both a good waterproof sealing effect can be achieved and the manufacturing and assembly costs can be reduced as a whole.

[0092] Please refer back to Figure 2 , in some embodiments, there is an installation gap 114 between the impeller 20 and the inner bottom wall of the installation cavity 110. A flow blocking ring 115 is arranged in the installation gap 114, and the flow blocking ring 115 can prevent the airflow in the installation gap 114 from flowing from the outside of the flow blocking ring 115 to the inside of the flow blocking ring 115.

[0093] As shown in Figure 2, there is an installation gap 114 between the lower surface of the impeller 20 and the upper surface of the lower housing 112. A flow blocking ring 115 is arranged in the installation gap 114, which can block the water vapor entering the installation gap 114. More specifically, it can prevent the water vapor in the installation gap 114 from flowing along the edge of the installation cavity 110 towards the center of the installation cavity 110 and flowing towards the bearing 70, resulting in corrosion and damage to the bearing 70.

[0094] It can be understood that the position of the baffle ring 115 is relatively far from the bearing 70, and the positions of the first sealing cover 80 and the second sealing cover 90 are relatively close to the bearing 70. In this way, most of the water vapor in the installation gap 114 is first blocked from flowing towards the bearing 70 by the baffle ring 115, and then the multiple waterproof sealing structures formed by the cooperation of the first sealing cover 80 and the second sealing cover 90 with the lower housing 112 and the output shaft 30 greatly prevent the water or water vapor in the installation cavity 110 from flowing towards the bearing 70, avoiding the immersion and corrosion of the bearing 70 and ensuring the service performance and life of the fan 100.

[0095] Optionally, the baffle ring 115 can be connected to the impeller 20 or the lower housing 112, and the baffle ring 115 can be provided with one or more layers. For example, Figure 2 In [reference figure], two layers of baffle rings 115 are provided, and both layers of baffle rings 115 are connected to the lower housing 112.

[0096] Please refer to Figure 8 , in some embodiments, one of the upper housing 111 and the lower housing 112 is provided with a clamping groove 1120, and the other is provided with a convex ring 1110. The convex ring 1110 is clamped in the clamping groove 1120 and is in sealing cooperation with the clamping groove 1120.

[0097] In one implementation manner, as shown in Figure 8 , the lower housing 112 is provided with a clamping groove 1120, and the upper housing 111 is provided with a convex ring 1110. The clamping groove 1120 is provided at one end of the lower housing 112 facing the upper housing 111, and the convex ring 1110 is located at one end of the upper housing 111 facing the lower housing 112. The clamping groove 1120 and the convex ring 1110 are in clearance fit to form a double rabbet sealing structure. Before assembly, only a little glue needs to be applied in the clamping groove 1120, and then the convex ring 1110 is pressed into the clamping groove 1120 so that the glue fills the gap between the clamping groove 1120 and the convex ring 1110, and the double rabbet sealing between the upper housing 111 and the lower housing 112 can be achieved. This method has a good sealing and waterproof effect and can prevent the water or water vapor in the installation cavity 110 from leaking out through the gap between the upper housing 111 and the lower housing 112.

[0098] Optionally, the wall thickness of the lower housing 112 is d1, the width of the clamping groove 1120 is d2, d2 = (0.35 - 0.65) * d1, the thickness of the convex ring 1110 is d3, and d3 = (0.6 - 0.9) * d2.

[0099] In another implementation manner, it can also be that the upper housing 111 is provided with a clamping groove 1120 and the lower housing 112 is provided with a convex ring 1110, and the above sealing effect can also be achieved.

[0100] Please refer to Figure 9, based on the same utility model concept, an embodiment of the present utility model also provides a cleaning robot 200, which includes a blower 100 as described in any of the above embodiments.

[0101] Since the cleaning robot 200 includes the blower 100 described in any of the above embodiments, it also has the beneficial effects of any of the above embodiments. For specific beneficial effects, please refer to the above text and will not be elaborated here.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; under the idea of the present utility model, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A fan, characterized in that, include: The housing comprises a shell and a connecting ring protruding from one side of the shell, the shell has a mounting cavity, the connecting ring has a connecting hole, and the mounting cavity is connected to the connecting hole; an impeller, wherein the impeller is disposed in the mounting cavity; An output shaft, the output shaft is passed through the connecting hole and is drivingly connected to the impeller; A motor is installed on the outer peripheral side of the connecting ring, the motor is drivingly connected to the output shaft, and the motor can drive the output shaft to rotate, so that the output shaft drives the impeller to rotate.

2. The fan according to claim 1, wherein The motor comprises a rotor assembly and a stator assembly; The rotor assembly includes a motor housing and a magnetic ring arranged on the inner wall of the motor housing, the motor housing is located at an end of the connecting ring away from the housing, and the output shaft is fixedly matched with the motor housing; The stator assembly is fixedly matched with the outer wall of the connecting ring, and the stator assembly is located on the inner side of the motor housing. The stator assembly can be matched with the magnetic ring to drive the motor housing and the output shaft to rotate.

3. The fan according to claim 1, characterized in that The fan also includes a bearing and a first sealing cover; The bearing is installed in the connecting hole, and the output shaft passes through the bearing; The first sealing cover is sleeved on the output shaft and located in the installation cavity. The first sealing cover has a first sealing portion. The inner bottom wall of the installation cavity is provided with a second sealing portion. The first sealing portion is sealed and connected to the second sealing portion.

4. The fan according to claim 3, characterized in that: The first sealing portion is a sealing ring, and the second sealing portion is an annular groove; Alternatively, the first sealing portion is an annular groove, and the second sealing portion is a sealing ring.

5. The blower according to claim 3, characterized in that, The fan further comprises a second sealing cover, wherein the second sealing cover is sleeved on the output shaft, and the second sealing cover is located between the first sealing cover and the bearing; A third sealing portion is disposed on a side of the first sealing cover facing the second sealing cover, a fourth sealing portion is disposed on a side of the second sealing cover facing the first sealing cover, and the third sealing portion is sealingly connected to the fourth sealing portion.

6. The fan according to claim 5, characterized in that: The third sealing portion is a sealing ring, and the fourth sealing portion is an annular groove; Alternatively, the third sealing portion is an annular groove, and the fourth sealing portion is a sealing ring.

7. The fan according to claim 5, characterized in that: The first sealing cover is interference-fitted with the output shaft, the second sealing cover is clearance-fitted with the output shaft, and the second sealing cover is sealingly connected with the output shaft; Alternatively, the second sealing cover is interference-fitted with the output shaft, the first sealing cover is clearance-fitted with the output shaft, and the first sealing cover is sealingly connected to the output shaft.

8. The fan according to claim 3, wherein An installation gap is provided between the impeller and the inner bottom wall of the installation cavity, and a baffle ring is provided in the installation gap, and the baffle ring can prevent the airflow in the installation gap from flowing from the outer side of the baffle ring to the inner side of the baffle ring.

9. The fan according to claim 1, characterized in that, The housing comprises an upper shell and a lower shell, the upper shell and the lower shell enclose the installation cavity, and the connecting ring is arranged on a side of the lower shell away from the upper shell; One of the upper shell and the lower shell is provided with a clamping groove, and the other is provided with a convex ring. The convex ring is arranged in the clamping groove and is in sealing fit with the clamping groove.

10. A cleaning robot, characterized in that, It includes a blower as described in any one of claims 1-9.

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