Dust collector and driving device thereof

Abstract

The utility model relates to a dust collector and a driving device thereof. The driving device comprises a motor (30), a planetary gearbox (80) and a cylindrical shell (10). The motor (30) is installed in the shell (10), and a rotating shaft (51) of the motor (30) extends out of the front end of the motor (30). The planetary gearbox (80) is installed in the shell (10), and the planetary gearbox (80) is located at the front end of the motor (30) and is aligned with the motor (30) in a positioning mode under the constraint of the shell (10). And a radial connecting piece penetrates through the shell (10) to fix the shell (10), the motor (30) and the planetary gear box (80) into a whole. According to the utility model, the motor and the planetary gear box are positioned through the common shell, so that the coaxiality of the motor and the planetary gear box can be improved; the shell, the motor and the planetary gearbox are fixed into a whole through the radial connecting piece, the assembling complexity of the driving device can be reduced, and the structure is simplified.

Description

Technical Field

[0001] The utility model relates to the field of electric drive, and more specifically, to a driving device for a vacuum cleaner. Background Art

[0002] As living standards improve, demand for vacuum cleaners is growing. Consumers demand a compact size while also demanding high power. This places new demands on the drive unit. Furthermore, the NVH (Noise, Vibration, Harshness) requirements for vacuum cleaners are becoming increasingly stringent. Existing drive units typically consist of a motor and planetary gearbox, resulting in complex assembly and a large size. Furthermore, reducing their size can lead to poor heat dissipation. Therefore, improvements are urgently needed. Utility Model Content

[0003] One object of the present application is to simplify the assembly of the drive device.

[0004] To this end, the present invention provides a drive device, comprising a motor and a planetary gearbox, wherein: the drive device comprises a cylindrical housing, a plurality of first radial connecting members and a plurality of second radial connecting members; the motor is installed in the housing, and the rotating shaft of the motor extends from the front end of the motor; the plurality of first radial connecting members pass through the housing and are directly or indirectly fixedly connected to the motor; the planetary gearbox is installed in the housing, the planetary gearbox is located at the front end of the motor, and is positioned and aligned with the motor under the constraint of the housing, receiving the output of the rotating shaft; the plurality of second radial connecting members pass through the housing and are directly or indirectly fixedly connected to the planetary gearbox, so that the housing, motor, and planetary gearbox are fixed as a whole.

[0005] In one embodiment of the present invention, the drive device includes a front end cover and a rear end cover at least partially accommodated in the housing, the plurality of first radial connecting members pass through the housing and are fixedly connected to the rear end cover, and the plurality of second radial connecting members pass through the housing and are fixedly connected to the front end cover; the planetary gearbox and the motor are respectively limited by the front end cover and the rear end cover and are fixedly accommodated in the housing.

[0006] In one embodiment of the present invention, the planetary gearbox includes a sun gear fixedly mounted on the rotating shaft, a plurality of planetary gears surrounding the sun gear, an inner ring gear surrounding the plurality of planetary gears, and a gear rack on which the plurality of planetary gears are mounted; the inner ring gear is fixed to the front end cover or is fixed to the outer casing under the limit of the front end cover.

[0007] In one embodiment of the present invention, the motor includes a stator and a rotor; the stator includes an annular shell and a permanent magnet fixedly mounted to the inner wall of the annular shell, the annular shell is installed in the outer shell, and the annular shell is provided with a plurality of positioning recesses at one end close to the rear end cover; the rear end cover or the inner wall of the outer shell is provided with a plurality of positioning protrusions, and the positioning protrusions cooperate with the positioning recesses to limit the position of the stator.

[0008] In one embodiment of the present invention, the inner wall of the shell is provided with a first slide groove extending along the axial direction of the motor, and the outer wall of the inner gear ring is provided with a corresponding first slide rail, and the first slide rail slides in the first slide groove when the planetary gear box is assembled to the shell.

[0009] In one embodiment of the present invention, the driving device also includes an impeller fixedly mounted on the rotating shaft and accommodated in the outer shell, and the impeller can generate airflow as the rotating shaft rotates; a channel is formed between the inner wall of the outer shell and the outer wall of the inner gear ring, and the channel serves as part of the cooling air duct for the airflow to flow through.

[0010] In one embodiment of the present invention, the rear end cover is equipped with a first bearing for supporting the rear end of the rotating shaft; the drive device also includes a bracket arranged in the outer shell, and the bracket is equipped with a second bearing for supporting the front end of the rotating shaft; the bracket is located between the motor and the planetary gearbox.

[0011] In one embodiment of the present invention, the drive device also includes a drive rod, which is connected to the final stage of the planetary gearbox and extends outward, and the drive rod is driven to rotate by the planetary gearbox; the drive device also includes a front end cover arranged at the front end of the housing, and the front end cover is equipped with a third bearing for supporting the drive rod.

[0012] In one embodiment of the present invention, the planetary gearbox includes two stages of reduction, each stage of reduction includes a sun gear, a plurality of planetary gears surrounding the sun gear, and a gear rack on which the plurality of planetary gears are mounted; the two stages of reduction share the same inner ring gear, and the inner ring gear meshes around and with the plurality of planetary gears at each stage.

[0013] A second aspect of the present invention provides a vacuum cleaner comprising the driving device described in the first aspect of the present invention.

[0014] The utility model positions the motor and the planetary gearbox through a common housing, thereby improving the coaxiality of the motor and the planetary gearbox; and fixes the housing, the motor, and the planetary gearbox into a whole through radial connectors, thereby reducing the assembly complexity of the drive device and simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To further disclose the technical contents of the present case, first refer to the drawings, wherein:

[0016] Figure 1 is a schematic diagram of the driving device provided by an embodiment of the present utility model;

[0017] Figure 2 is Figure 1 the schematic diagram of the explosion of the driving device shown in the figure;

[0018] Figure 3 is Figure 1 the longitudinal section schematic diagram of the driving device shown in the figure;

[0019] Figure 4 and Figure 5 is Figure 1 the exploded schematic diagram of the driving device at different angles shown in the figure;

[0020] Figure 6 is Figure 1 the exploded schematic diagram of the driving device after removing the shell shown in the figure;

[0021] Figure 7 is Figure 1 the schematic diagram of the front end cover, driving head and thrust ring of the driving device shown in the figure;

[0022] Figure 8 is Figure 1 the plane schematic diagram of the sun gear and the planetary gear of the driving device shown in the figure. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the present utility model will be described below in combination with the drawings of the present utility model.

[0024] Referring to Figure 1 and Figure 2 , the driving device 100 provided by an embodiment of the present utility model comprises a cylindrical shell 10, a motor 30 and a planetary gear box 80 accommodated into the shell 10. The front end of the driving device 100 is provided with a driving head 93 for connecting an external driven object (not shown in the figure), and the cable 15 of the motor 30 extends out from the rear end of the driving device 100.

[0025] The motor 30 is installed into the shell 10, and the rotating shaft 51 of the motor 30 extends out from the front end of the motor 30. The first radial connecting pieces 11 pass through the shell 10 and are directly or indirectly fixedly connected with the motor 30.

[0026] The planetary gearbox 80 is installed in the housing 10. The planetary gearbox 80 is located at the front end of the motor 30 and is aligned with the motor 30 under the constraints of the housing 10 to receive the output of the rotating shaft 51. A plurality of second radial connectors 12 pass through the housing 10 and are directly or indirectly fixedly connected to the planetary gearbox 80.

[0027] The present invention positions the motor 30 and the planetary gearbox 80 through a common housing 10, thereby improving the coaxiality of the motor 30 and the planetary gearbox 80; and fixes the housing 10, the motor 30, and the planetary gearbox 80 into a whole through radial connectors 11 and 12, thereby reducing the assembly complexity of the drive device 100, simplifying the structure, and reducing the size.

[0028] refer to Figure 2 and Figure 3 In this embodiment, the drive device 100 includes a front cover 21 and a rear cover 31. The front cover 21 is at least partially housed within the housing 10, and the rear cover 31 is at least partially housed within the housing 10. A first radial connector 11 passes through the housing 10 and is fixedly connected to the rear cover 31. A second radial connector 12 passes through the housing 10 and is fixedly connected to the front cover 21. The planetary gearbox 80 and the motor 30 are respectively restrained by the front cover 21 and the rear cover 31 and fixedly housed within the housing 10. As an alternative, the front cover 21 may be part of the planetary gearbox 80 or fixedly connected to the planetary gearbox 80.

[0029] In this embodiment, the planetary gearbox 80 features a multi-stage reduction gearbox. The first stage includes a sun gear 81 fixedly mounted on the rotating shaft 51, a plurality of planetary gears 82 surrounding the sun gear 81, an inner ring gear 83 surrounding the planetary gears 82, and a gear carrier 85 on which the planetary gears 82 are mounted. The inner ring gear 83 is fixed to the front end cover 21 or, when restrained by the front end cover 21, is fixed to the housing 10. The second stage includes a sun gear 86 fixed to the gear carrier 85, a plurality of planetary gears 87 surrounding the sun gear 86, and a gear carrier 88 on which the planetary gears 87 are mounted. The planetary gears 87 are also surrounded and meshed with the inner ring gear 83. In other words, the planetary gears 82 and 87 of the two reduction gearboxes share the same inner ring gear 83. By axially connecting multiple reduction gearboxes, a higher reduction ratio can be achieved while avoiding an increase in radial dimensions. It is understood that the planetary gearbox 80 can employ a single or more reduction gearboxes.

[0030] refer to Figures 2 to 5The motor 30 includes a stator 40 and a rotor 50. The stator 40 includes an annular housing 41 and a plurality of permanent magnets 44 fixedly mounted to the inner wall of the annular housing 41. Springs 45 are provided between adjacent permanent magnets 44 to reinforce the installation of the permanent magnets 44. The rotor 50 includes a rotating shaft 51, a commutator 52 fixed to the rotating shaft 51, a rotor core 53, and a rotor winding wound around the teeth of the rotor core 53. The corresponding wire ends of the rotor winding are hooked to the corresponding commutator segments of the commutator 52 and form a conductive connection. The rotor core 53 is housed in the stator 40 and is surrounded by the plurality of permanent magnets 44. It can be understood that there is a gap 48 between the outer periphery of the rotor core 53 and the stator 40 to facilitate the rotation of the rotor 50 relative to the stator 40.

[0031] The annular housing 41 of the stator 40 is installed within the housing 10. Several positioning recesses 42 are provided on one end of the annular housing 41, near the rear end cap 31. Several positioning protrusions 33 are provided on the inner wall of the rear end cap 31 or the housing 10. These protrusions 33 cooperate with the positioning recesses 42 to restrict the position of the stator 40, thereby preventing rotation. In this embodiment, the motor 30 is a permanent magnet DC brushed motor. A brush holder 32 is provided inside the rear end cap 31. This brush holder 32 is equipped with positioning protrusions 33 and brushes for powering the commutator 52. It is understood that the brush holder 32 can be integral with the rear end cap 31.

[0032] A plurality of positioning recesses 43 may also be provided on the end of the annular shell 41 away from the rear end cover 31. Corresponding positioning protrusions 18 are provided on the inner wall of the outer shell 10 to cooperate with the positioning recesses 43. In this embodiment, a bracket 17 is also provided in the outer shell 10, and the bracket 17 is located between the motor 30 and the planetary gearbox 80. A positioning protrusion 18 is provided on the side of the bracket 17 near the motor 30. In this way, during assembly, the motor 30 is limited between the bracket 17 and the rear end cover 31, and the planetary gearbox 80 is limited between the bracket 17 and the front end cover 21. The rear end cover 21 and the bracket 17 are respectively installed with a first bearing 36 and a second bearing 37, which are used to support the rear end and the front end of the rotating shaft 51, respectively.

[0033] A first slide groove 19 extending along the motor's axial direction is defined on the inner wall of the housing 10, and a corresponding first slide rail 84 is defined on the outer wall of the inner ring gear 83. The first slide rail 84 slides in the first slide groove 19 when the planetary gearbox 80 is assembled to the housing 10. This structure facilitates assembly of the planetary gearbox 80 while also limiting rotation of the inner ring gear 83 relative to the housing 10, effectively securing the inner ring gear 83 to the housing 10.

[0034] The present invention can improve the compactness of the structure. In order to facilitate the heat dissipation of the drive device, the present invention is also provided with a cooling air duct and an impeller for generating airflow. Specifically, the drive device 100 also includes two impellers 55 and 56 fixedly mounted on the rotating shaft 51 and accommodated in the outer shell 10. The impellers 55 and 56 are respectively fixed to both sides of the rotating shaft 51, located on both sides of the rotor 50, and can generate airflow as the rotating shaft 51 rotates. The aforementioned gap 48 between the stator 40 and the rotor 50 serves as part of the cooling air duct. When the motor 30 is working, the impellers 55 and 56 rotate with the rotating shaft 51 to form an airflow, and the airflow flows through the gap 48 between the stator 40 and the rotor 50 to help the motor 30 dissipate heat.

[0035] In this embodiment, a plurality of first channels 28 are formed between the inner wall 10a of the housing 10 and the outer wall 83a of the inner ring gear 83. These first channels 28 serve as a portion of the cooling duct for airflow. Therefore, this airflow also helps dissipate heat from the planetary gearbox 80. Preferably, the bracket 17 is provided with a plurality of through-holes 20 for airflow. One side of the through-holes 20 connects to the gap 48 between the stator 40 and the rotor 50, and the other side connects to the first channels 28 between the inner wall 10a of the housing 10 and the outer wall 83a of the inner ring gear 83.

[0036] In this embodiment, the rear cover 31 is provided with a first air flow opening 34 communicating with the gap 48. A plurality of second channels 29 are also formed between the front cover 21 and the inner wall of the housing 10. One end of the second channel 29 communicates with the first channel 28, and the other end communicates with the second air flow opening 26 at the front end of the planetary gearbox 80.

[0037] The first airflow opening 34 and the second airflow opening 26 are connected to the two ends of the cooling air duct. One of the first airflow opening 34 and the second airflow opening 26 serves as the air inlet, and the other serves as the air outlet. For example, with the first airflow opening 34 serving as the air inlet, air flows sequentially through the gap 48, the through-hole 20, the first channel 28, the second channel 29, and the second airflow opening 26. The gap 48, the through-hole 20, the first channel 28, and the second channel 29 form a cooling channel.

[0038] In this embodiment, the motor 30 includes a stator 40 and a rotor 50. The stator 40 is fixedly mounted to the inner wall of the housing 10, and the rotor 50 is surrounded by the stator 40 and can rotate relative to the stator 40. The gap 48 between the stator 40 and the rotor 50 serves as part of the cooling air duct. There are two impellers, one at each end of the motor 30. Alternatively, a single impeller can be installed between the motor 30 and the rear end cover 31, or between the motor 30 and the bracket 17.

[0039] refer to Figures 2 to 7The drive device 100 further includes a return spring 94, a drive rod 91, and a drive head 95. The drive rod 91 is connected to the final stage of the planetary gearbox 80 and extends outward. The drive rod 91 is driven to rotate by the planetary gearbox 80. The drive head 95 is slidably mounted on the outer end of the drive rod 91. As the drive rod 91 rotates, the drive head 95 rotates along the drive rod 91 by a predetermined distance. The return spring 94 applies a return force to the drive head 95, causing it to return to a predetermined position.

[0040] The drive device 100 also includes a thrust ring 25 mounted on the front end of the housing 10. The thrust ring 25 is used to limit the maximum distance that the drive head 95 can be away from the planetary gearbox 80. The return spring 94 is used to return the drive head 95 to the maximum distance. When the drive device 100 is driven externally, the drive head 95 retracts a certain distance toward the planetary gearbox 80.

[0041] refer to Figure 6 and Figure 7 In this embodiment, a connector 92 is sleeved on the outer end of the drive rod 91. The connector 92 is provided with a plurality of second slide grooves 93. A drive head 95 is sleeved onto the connector 92. Second slide rails 96 are provided within the drive head 95 and engage with the second slide grooves 93. The connector 92 can slide relative to the drive rod 91 but cannot rotate relative to the drive rod 91. Therefore, when the drive rod 91 rotates, the drive head 95 is driven to rotate via the connector 92. A return spring 94 is compressed between the front cover 21 and the connector 92. When the drive head 95 retracts toward the planetary gearbox 80, it retracts the connector 92 and compresses the return spring 94. Conversely, when the return spring 94 returns, it pushes the connector 92 outward, thereby returning the drive head 95. Alternatively, the connector 92 can be fixed to the drive rod 91, with the drive head 95 slidably sleeved thereon. The return spring 94 is compressed between the front cover 21 and the drive head 95.

[0042] The front end cover 21 includes a ring body 24, a hub 22 located in the middle of the ring body 24, and a plurality of blocks 23 provided on the outer periphery of the ring body 24. The surfaces of the blocks 23 are provided with inclined surfaces as guide surfaces. The hub 22 is provided with a third bearing 38 (see FIG. Figure 3 ), the third bearing 38 rollingly supports the drive rod 91. The thrust ring 25 is snapped onto the front end cover 21 from the outside. The thrust ring 25 comprises a ring body 2501 and several connecting portions 2503 extending from one side of the ring body 2501. The connecting portions 2503 are provided with locking holes 2505. When the thrust ring 25 is snapped onto the front end cover 21 from the outside, the connecting portions 2503, guided by the inclined surface of the locking block 23, cross over the locking block 23, causing the locking block 23 to slide into the locking holes 2505 of the connecting portions 2503, thereby achieving a locked connection between the two.

[0043] The second air flow opening 26 is formed between the ring body 2501 of the thrust collar 25 and the front end cover 21. The drive head 95 is cap-shaped and includes a cap body, a plurality of protruding teeth 97 formed on the outer periphery of the cap body, and a flange 98 extending outward from the lower end of the cap body. When the drive head 95 is in the reset state, the flange 98 is close to the ring body 2501. When the drive head 95 is retracted a certain distance toward the planetary gearbox 80, the flange 98 moves away from the ring body 2501, thereby increasing the area of ​​the second air flow opening 26 and increasing the area of ​​communication between the housing 10 and the outside. Alternatively, when the drive head 95 is in the reset state, the flange 98 abuts the ring body 2501, thereby blocking the second air flow opening 26. When the drive head 95 is retracted a certain distance toward the planetary gearbox 80, the flange 98 moves away from the ring body 2501, thereby opening the second air flow opening 26 between the drive head 95 and the thrust collar 25, or equivalently forming a second air flow opening 26 between the two, allowing the cooling channel to communicate with the outside.

[0044] refer to Figure 8 In order to improve the NVH and driving effect of the drive device 100, the present invention also trims the teeth of the sun gear, planetary gears, and inner ring gear. The trimming method is to trim a certain proportion of the tooth surface on both sides of the tooth top of each tooth so that the tooth surface has an outer arched surface. The following is an example of the sun gear 81 and the planetary gear 82. The tooth 8101 of the sun gear 81 includes a tooth top 8103 and two tooth surfaces 8105, and the two tooth surfaces 8105 are respectively located on both sides of the tooth top 8103. The tooth surface 8105 is trimmed near the tooth top 8103 to form an outer arched surface 8105b.

[0045] Preferably, the portion of the tooth surface 8105 near the tooth root is substantially flat 8105a, which is connected to the outer arc surface 8105b. The outer arc surface 8105b accounts for 50% to 90% of the surface area of ​​the tooth surface 8105, and more preferably, the outer arc surface 8105b accounts for 70% to 85% of the surface area of ​​the tooth surface 8105.

[0046] Preferably, the angle A2 formed by the tangent lines of the two tooth surfaces 8105 near the tooth top 8103 is 45 to 75 degrees. More preferably, the angle A2 is 55 to 65 degrees.

[0047] Preferably, the angle formed by the tangent lines of the two tooth surfaces 8105 at symmetrical positions gradually increases as they move away from the tooth top 8103, with the maximum angle being between 45 and 75 degrees, as shown by angle A2 in the figure; and the minimum angle being between 10 and 25 degrees, as shown by angle A1 in the figure. More preferably, angle A2 is between 55 and 65 degrees, and angle A1 is between 12 and 20 degrees.

[0048] The size and shape of the teeth 8201 of the planetary gear 82 are identical to the teeth 8101 of the sun gear 81, and will not be further described. Similarly, the size and shape of the teeth of the inner ring gear are identical to the teeth 8101 of the sun gear 81, and the size and shape of the teeth of the other sun gears and planetary gears are also identical to the teeth 8101 of the sun gear 81.

[0049] After the tooth surface is trimmed by the present invention, the smoothness of the tooth surface 8105 is improved, the contact area of ​​the tooth surface 8105 is increased and the transition is smooth, the meshing degree is significantly improved, the wear between the gears is reduced during the working process, the noise and vibration are correspondingly reduced, and the NVH is significantly improved.

[0050] The drive device 100 is particularly suitable for a vacuum cleaner.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A driving device comprising a motor (30) and a planetary gearbox (80), characterized in that: The driving device comprises a cylindrical housing (10), a plurality of first radial connecting members (11), and a plurality of second radial connecting members (12); The motor (30) is installed in the housing (10), and the rotating shaft (51) of the motor (30) extends from the front end of the motor (30); the plurality of first radial connecting members (11) pass through the housing (10) and are directly or indirectly fixedly connected to the motor (30); The planetary gearbox (80) is installed in the housing (10), the planetary gearbox (80) is located at the front end of the motor (30), and is positioned and aligned with the motor (30) under the constraint of the housing (10), receiving the output of the rotating shaft (51); the plurality of second radial connecting members (12) pass through the housing (10) and are directly or indirectly fixedly connected to the planetary gearbox (80), so that the housing (10), the motor (30), and the planetary gearbox (80) are fixed as a whole.

2. The driving device according to claim 1, characterized in that: The driving device comprises a front end cover (21) and a rear end cover (31) at least partially housed in the housing (10); the plurality of first radial connecting members (11) pass through the housing (10) and are fixedly connected to the rear end cover (31); and the plurality of second radial connecting members (12) pass through the housing (10) and are fixedly connected to the front end cover (21); The planetary gearbox (80) and the motor (30) are respectively limited by the front end cover (21) and the rear end cover (31) and fixedly accommodated in the housing (10).

3. The driving device according to claim 2, characterized in that The planetary gearbox (80) comprises a sun gear (81) fixedly mounted on the rotating shaft (51), a plurality of planetary gears (82) surrounding the sun gear (81), an inner ring gear (83) surrounding the plurality of planetary gears (82), and a gear rack (85) on which the plurality of planetary gears (82) are mounted; the inner ring gear (83) is fixed to the front end cover (21) or is fixed to the housing (10) under the limit of the front end cover (21).

4. The driving device according to claim 2, characterized in that The motor (30) includes a stator (40) and a rotor (50); the stator (40) includes an annular shell (41) and a permanent magnet (44) fixedly mounted on the inner wall of the annular shell (41); the annular shell (41) is mounted in the housing (10); a plurality of positioning recesses (42) are provided at one end of the annular shell (41) close to the rear end cover (31); a plurality of positioning protrusions (33) are provided on the inner wall of the rear end cover (31) or the housing (10); the positioning protrusions (33) cooperate with the positioning recesses (42) to limit the position of the stator (40).

5. The driving device according to claim 3, characterized in that The inner wall of the housing (10) is provided with a first slide groove (19) extending along the axial direction of the motor, and the outer wall of the inner gear ring (83) is provided with a corresponding first slide rail (84). The first slide rail (84) slides in the first slide groove (19) when the planetary gear box (80) is assembled to the housing (10).

6. The driving device according to claim 3, characterized in that The driving device further comprises an impeller fixedly mounted on the rotating shaft (51) and housed in the housing (10), wherein the impeller can generate airflow as the rotating shaft (51) rotates; a channel (28) is formed between the inner wall (10a) of the housing (10) and the outer wall (83a) of the inner gear ring (83), and the channel (28) serves as a part of a cooling air duct for the airflow to flow through.

7. The driving device according to claim 2, characterized in that The rear end cover (31) is provided with a first bearing (36) for supporting the rear end of the rotating shaft (51); the driving device further comprises a bracket (17) arranged in the housing (10), the bracket (17) being provided with a second bearing (37) for supporting the front end of the rotating shaft (51); the bracket (17) is located between the motor (30) and the planetary gearbox (80).

8. The driving device according to claim 1, characterized in that The drive device further includes a drive rod (91), the drive rod (91) being connected to the final stage of the planetary gearbox (80) and extending outward, and the drive rod (91) being driven to rotate by the planetary gearbox (80); the drive device further includes a front end cover (21) provided at the front end of the housing (10), the front end cover (21) being provided with a third bearing (38) for supporting the drive rod (91).

9. The driving device according to claim 1, characterized in that The planetary gearbox (80) includes two stages of reduction, each stage of reduction includes a sun gear, a plurality of planetary gears surrounding the sun gear, and a gear frame for mounting the plurality of planetary gears; the two stages of reduction share the same inner gear ring, the inner gear ring meshes around the plurality of planetary gears of each stage, and meshes with the plurality of planetary gears of each stage.

10. A vacuum cleaner, characterized in that: A driving device comprising the driving device according to any one of claims 1 to 9.

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