Hub motor for sweeper

Abstract

The utility model relates to a wheel hub motor for a sweeper, which comprises a shell and a wheel hub, the wheel hub is rotatably connected with the shell, a stator, a rotor and a rotating shaft which are coaxially arranged are arranged in the shell, the rotor and the stator are sequentially sleeved on the outer side of the rotating shaft, the output end of the rotating shaft is exposed out of the shell and is connected with a sun gear, and the sun gear is connected with a motor. According to the hub motor, the hub is directly meshed and driven through the planetary gears, so that the rotating shaft sequentially drives the sun gear, the planetary gears and the hub to synchronously rotate, installation of an inner gear ring is omitted, the overall structure of the hub motor is compact, and the hub motor is convenient to use. And the size is smaller.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a hub motor for a sweeper. Background Technology

[0002] With the rapid development of industrial technology, hub motor technology has gradually entered the public eye. A hub motor is a drive technology that integrates the motor directly into the wheel hub. Its biggest feature is that the drive, transmission, and braking devices are all integrated within the wheel hub, directly driving the wheel's rotation. Due to its high efficiency and compactness, hub motors can be applied to mobile devices such as smart cars, smart sweepers, and smart robots. However, traditional hub motors installed on sweepers suffer from problems such as large size and bulky structure. For example, to solve torque issues, existing sweepers typically use a motor and gearbox, with the gearbox often employing multi-stage gear reduction. The wheel hub is driven by a single stage of gear, resulting in a large size and significant space occupation. Utility Model Content

[0003] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a small-sized hub motor for sweeping machines.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a hub motor for a sweeper, including a housing and a hub, the hub being rotatably connected to the housing, the housing having a stator, a rotor and a rotating shaft arranged coaxially inside, the rotor and stator being sequentially sleeved on the outside of the rotating shaft, the output end of the rotating shaft being exposed outside the housing and connected to a sun gear, the sun gear being connected to at least two planetary gears, the planetary gears meshing with the inner wall of the hub for transmission.

[0005] Furthermore, the hub is provided with a first cavity and a second cavity, the second cavity is arranged around the outer periphery of the first cavity, and the inner wall of the first cavity is provided with internal teeth for meshing with the planetary gear.

[0006] Furthermore, the housing includes a first housing and a second housing that are detachably connected. The first housing has a first mounting groove with an opening facing the second housing. The second housing has a second mounting groove with an opening facing the first housing and a third mounting groove with an opening facing the hub. The stator and rotor are mounted in the space enclosed by the first mounting groove and the second mounting groove.

[0007] Furthermore, the third mounting groove is provided with a mounting shaft for the planetary gear to engage, and the inner diameter of the third mounting groove is larger than the outer diameter of the first cavity.

[0008] Furthermore, the inner diameter of the second cavity is larger than the outer diameter of the third mounting groove, and a first bearing is assembled between the inner wall of the second cavity and the outer wall of the third mounting groove.

[0009] Furthermore, the first housing is connected to the rotating shaft via a second bearing, and the second housing is connected to the rotating shaft via a third bearing. The first housing has a first mounting position in its first mounting groove for mounting the second bearing, and the second housing has a second mounting position in its second mounting groove for mounting the third bearing. The second mounting position connects the second mounting groove and the third mounting groove.

[0010] Compared with the prior art, the advantages of this utility model are as follows: This utility model directly meshes with the hub through planetary gears, so that the rotating shaft drives the sun gear, planetary gears and hub to rotate synchronously in sequence, eliminating the need for the installation of the internal gear ring, thereby making the overall structure of the hub motor compact and smaller in size, which meets market demand. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a cross-sectional view of the present invention;

[0013] Figure 3 This is an exploded view of the present invention;

[0014] Figure 4 This is a schematic diagram of the structure of the wheel hub of this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the second housing of this utility model;

[0016] As shown in the figure, 1 is the housing, 1a is the first housing, 1b is the second housing, 1.1 is the first mounting slot, 1.2 is the second mounting slot, 1.3 is the third mounting slot, 1.4 is the mounting shaft, 1.5 is the first mounting position, 1.6 is the second mounting position, 2 is the hub, 2.1 is the first cavity, 2.2 is the second cavity, 2.3 is the internal gear, 3 is the stator, 4 is the rotor, 5 is the rotating shaft, 6 is the sun gear, 7 is the planetary gear, 8 is the first bearing, 9 is the second bearing, and 10 is the third bearing. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figure 1-5As shown, this utility model provides a hub motor for a sweeper, including a housing 1 and a hub 2. The hub 2 is rotatably connected to the housing 1. The housing 1 is provided with a stator 3, a rotor 4 and a rotating shaft 5 arranged coaxially. The rotor 4 and the stator 3 are sequentially sleeved on the outside of the rotating shaft 5. The output end of the rotating shaft 5 is exposed outside the housing 1 and connected to a sun gear 6. The sun gear 6 is connected to at least two planetary gears 7. The planetary gears 7 mesh with the inner wall of the hub 2 for transmission.

[0023] This invention uses a rotating shaft 5 to sequentially drive the sun gear 6, planetary gear 7, and hub 2. The planetary gear 7 directly meshes with the hub 2, eliminating the need for an internal gear ring, thus making the overall structure of the hub motor compact and smaller in size.

[0024] Among them, see Figure 4 The hub 2 has a first cavity 2.1 and a second cavity 2.2. The second cavity 2.2 is arranged around the outer periphery of the first cavity 2.1. The inner wall of the first cavity 2.1 is provided with internal teeth 2.3 for meshing and driving the planetary gear 7. By providing the first cavity 2.1 and the second cavity 2.2 in the hub 2, a compact assembly with the housing 1 can be achieved, reducing the overall structural volume. By forming a ring of internal teeth 2.3 on the inner wall of the first cavity 2.1, the planetary gear 7 can mesh and drive, eliminating the transition transmission of the internal gear ring, reducing the assembly of the internal gear ring, and allowing the planetary gear 7 to be directly connected to the hub 2, thereby making the overall volume smaller and reducing the space occupied.

[0025] Among them, see Figure 2 , 3 5. The housing 1 includes a detachably connected first housing 1a and second housing 1b. The first housing 1a has a first mounting groove 1.1 with an opening facing the second housing 1b. The second housing 1b has a second mounting groove 1.2 with an opening facing the first housing 1a and a third mounting groove 1.3 with an opening facing the hub 2. The stator 3 and rotor 4 are installed in the space enclosed by the first mounting groove 1.1 and the second mounting groove 1.2. The use of detachable first housing 1a and second housing 1b makes it easier to assemble and maintain the internal parts of the housing 1. The first mounting groove 1.1 on the first housing 1a and the second mounting groove 1.2 on the second housing 1b are used to install the stator 3 and rotor 4. The third mounting groove 1.3 on the second housing 1b is used to install the planetary gear 7. This structure separates the installation space of the planetary gear 7 from that of the stator 3 and rotor 4, preventing interference, making operation safer, and assembly more convenient.

[0026] Among them, see Figure 2 , 3The third mounting groove 1.3 is provided with a mounting shaft 1.4 for the planetary gear 7 to be fitted. The planetary gear 7 is mounted on the mounting shaft 1.4 by bearings. The planetary gear 7 rotates along the axis of the mounting shaft 1.4. The rotating shaft 5 drives the sun gear 6 to rotate, and the sun gear 6 drives the planetary gear 7 to rotate, thereby causing the planetary gear 7 to drive the hub 2 to rotate. Preferably, there are three planetary gears 7, which are equally spaced and mesh with the outer circumference of the sun gear 6. This ensures both convenient installation and stable rotation of the hub 2. The inner diameter of the third mounting groove 1.3 is larger than the outer diameter of the first cavity 2.1, so that the first cavity 2.1 can be embedded in the third mounting groove 1.3. This ensures that the planetary gear 7 meshes with the internal teeth 2.3 on the inner wall of the first cavity 2.1, and also ensures that the inner wall of the third mounting groove 1.3 does not contact the outer wall of the first cavity 2.1 to generate frictional resistance, thereby achieving effective use of space and reducing the overall volume.

[0027] Among them, see Figure 2 The inner diameter of the second cavity 2.2 is larger than the outer diameter of the third mounting groove 1.3, so that the third mounting groove 1.3 can be embedded in the second cavity 2.2, realizing effective use of space and reducing the overall volume. A first bearing 8 is assembled between the inner wall of the second cavity 2.2 and the outer wall of the third mounting groove 1.3. The setting of the first bearing 8 makes the hub 2 have better load-bearing capacity, prevents the hub motor from being damaged due to excessive force, extends service life, and also makes the hub 2 have better stability and smoother rotation.

[0028] Among them, see Figure 2 , 3 The first housing 1a is connected to the rotating shaft 5 via the second bearing 9, and the second housing 1b is connected to the rotating shaft 5 via the third bearing 10. The first mounting groove 1.1 of the first housing 1a has a first mounting position 1.5 for mounting the second bearing 9, and the second mounting groove 1.2 of the second housing 1b has a second mounting position 1.6 for mounting the third bearing 10. The second mounting position 1.6 connects the second mounting groove 1.2 and the third mounting groove 1.3. The second bearing 9 and the third bearing 10 are located on both sides of the rotor 4. The arrangement of the second bearing 9 and the third bearing 10 can ensure that the rotating shaft 5 rotates stably and smoothly. The second mounting position 1.6 can be used to install the third bearing 10 on one hand, and on the other hand, the output end of the rotating shaft 5 can pass through and be exposed in the third mounting groove 1.3 to realize the assembly of the sun gear 6 and the planetary gear 7. The overall structure is compact.

[0029] In use, the stator 3 and the rotor 4 work together. The rotor 4 drives the shaft 5 to rotate, the shaft 5 drives the sun gear 6 to rotate, the sun gear 6 drives the planetary gear 7 to rotate, and the planetary gear 7 drives the hub 2 to rotate. The overall structure is compact. The planetary gear 7 directly meshes with the internal gear 2.3 inside the hub 2, eliminating the need for the installation of the internal gear ring, thus making the overall structure of the hub motor compact and smaller in size.

[0030] Unless otherwise specified, the materials, reagents, and experimental equipment involved in this embodiment of the utility model are all commercially available products in the field of motors.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wheel hub motor for a floor sweeping machine, characterized by, The application relates to a wheel hub motor, which comprises a shell and a wheel hub, the wheel hub is rotationally connected with the shell, the shell is internally provided with a stator, a rotor and a rotating shaft arranged coaxially, the rotating shaft is externally sleeved with the rotor and the stator in sequence, an output end of the rotating shaft is exposed outside the shell and connected with a sun gear, the sun gear is connected with at least two planetary gears, and the planetary gears are in mesh transmission with the inner wall of the wheel hub.

2. The wheel hub motor for a robot vacuum cleaner according to claim 1, characterized in that, The wheel hub is internally provided with a first cavity and a second cavity, the second cavity is annularly arranged outside the first cavity, and the inner wall of the first cavity is annularly provided with internal teeth for mesh transmission of the planetary gears.

3. The wheel hub motor for a robot vacuum cleaner according to claim 2, characterized in that, The shell comprises a first shell and a second shell which are detachably connected, the first shell is provided with a first mounting groove with an opening facing the second shell, the second shell is provided with a second mounting groove with an opening facing the first shell and a third mounting groove with an opening facing the wheel hub, and the stator and the rotor are mounted in a space enclosed by the first mounting groove and the second mounting groove.

4. The wheel hub motor for a robot vacuum cleaner according to claim 3, characterized in that, The third mounting groove is internally provided with a mounting shaft for sleeving the planetary gears, and the inner diameter of the third mounting groove is larger than the outer diameter of the first cavity.

5. The wheel hub motor for a robot vacuum cleaner according to claim 3, wherein The inner diameter of the second cavity is larger than the outer diameter of the third mounting groove, and a first bearing is assembled between the inner wall of the second cavity and the outer wall of the third mounting groove.

6. The wheel hub motor for a robot vacuum cleaner according to claim 3, wherein The first shell is connected with the rotating shaft through a second bearing, the second shell is connected with the rotating shaft through a third bearing, the first mounting groove of the first shell is internally provided with a first mounting position for mounting the second bearing, the second mounting groove of the second shell is internally provided with a second mounting position for mounting the third bearing, and the second mounting position is communicated with the second mounting groove and the third mounting groove.

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