Speed reduction motor and mobile device

Abstract

The application discloses a speed reduction motor and a mobile device. The speed reduction motor comprises a shell, an inner wall of the shell is provided with an inner ring gear, a first power part is installed in the shell, a sun gear is arranged on the first power part, a second power part is installed in the shell, the first power part and the second power part can rotate relative to each other, an annular carrier is arranged in the shell and connected to the second power part, a plurality of planetary gears are rotatably connected to the annular carrier, the planetary gears are respectively engaged with the sun gear and the inner ring gear, a planetary cover is arranged on the annular carrier to limit the planetary gears in the axial direction, a connecting shaft penetrates through the shell and is connected to the planetary cover, and the planetary cover is integrally formed with at least one of the annular carrier and the connecting shaft. Through the integral forming of the planetary cover with at least one of the annular carrier and the connecting shaft, the product precision is improved, the structural strength is enhanced, the overall torsional performance and service life are improved, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of motor technology, and in particular relates to a geared motor and a mobile device. Background Technology

[0002] Motors have a wide range of applications, and hub motors with reduction gears are widely favored when high output torque is required. Gear motor designs are basically brushless motors combined with planetary gear reducers; however, planetary gear reducers have many parts, significantly impacting tolerances, structural strength, and cost. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a geared motor and mobile device that improves product accuracy and structural strength while reducing production costs.

[0004] In a first aspect, this application provides a geared motor, comprising: The outer casing has an inner toothed ring on its inner wall; The first power unit is installed inside the outer casing, and a sun gear is provided on the first power unit; The second power unit is installed inside the housing, and the first power unit and the second power unit can rotate relative to each other; The planetary carrier is located inside the outer casing and connected to the second power unit. Multiple planetary gears are rotatably connected to the planetary carrier, and the planetary gears mesh with the sun gear and the internal gear ring, respectively. Planetary cover, which is placed on the planet carrier to limit the axial movement of the planet gears; The connecting shaft passes through the outer casing and connects to the planetary cover; Among them, the planetary cover and at least one of the planet carrier and connecting shaft are integrally formed.

[0005] According to the geared motor of this application, by integrally molding the planetary cover with at least one of the planetary carrier and connecting shaft, the following advantages are achieved: First, it improves product precision, as the integral molding avoids the cumulative errors caused by assembling multiple parts, ensuring the meshing accuracy of the planetary gears with the sun gear and the internal gear ring, and reducing transmission noise and wear; second, it enhances structural strength, as the integral molding structure eliminates weak points at the connection points of the parts, improving the overall torsional resistance and service life; third, it reduces production costs, as it reduces the number of parts, simplifies the assembly process, reduces material and labor costs, and improves production efficiency; and fourth, it optimizes transmission stability, reducing the relative movement clearance between parts, making power transmission smoother and the output torque more stable.

[0006] According to one embodiment of this application, the planetary cover and the planetary carrier are integrally formed, and the connecting shaft is detachably connected to the planetary cover.

[0007] According to one embodiment of this application, the planetary carrier includes a base plate and a plurality of support portions disposed on the base plate. The base plate is connected to a second power unit, and the planetary cover is integrally connected to one end of the plurality of support portions away from the base plate.

[0008] According to one embodiment of this application, the planetary cover is provided with a plurality of first mounting holes, and the base plate is provided with a plurality of second mounting holes corresponding to the plurality of first mounting holes. The two ends of the planetary gear shaft are respectively provided in the first mounting holes and the second mounting holes.

[0009] According to one embodiment of this application, the planetary cover is provided with a plurality of first reinforcing parts on the side away from the planet carrier, and the plurality of first reinforcing parts correspond one-to-one with a plurality of first mounting holes, one end of the first mounting hole extending into the first reinforcing part.

[0010] According to one embodiment of this application, the first reinforcing part is provided with a communicating hole that communicates with the first mounting hole, and the diameter of the communicating hole is smaller than the diameter of the first mounting hole.

[0011] According to one embodiment of this application, the connecting shaft and the planetary cover are integrally formed, and the planetary cover and the planet carrier are detachably connected.

[0012] According to one embodiment of this application, the planetary carrier includes a base plate and a plurality of support portions disposed on the base plate. The base plate is connected to a second power unit. The planetary cover includes a plurality of connecting portions corresponding one-to-one with the plurality of support portions. The connecting portions are connected to the support portions respectively.

[0013] According to one embodiment of this application, a limiting part is provided at one end of the support part near the connecting part, and the connecting part and the limiting part abut against each other in the radial direction of the connecting shaft.

[0014] According to one embodiment of this application, the planetary cover is connected to the end of the connecting shaft near the planet carrier.

[0015] According to one embodiment of this application, the side wall of the connecting shaft near the planetary cover is provided with a wire-passing hole, the planetary cover is provided with a first wire-passing groove corresponding to the wire-passing hole, and the planetary carrier is provided with a second wire-passing groove corresponding to the first wire-passing groove.

[0016] According to one embodiment of this application, the first power unit includes a spindle and a rotor, the spindle being rotatably connected to the housing, the sun gear and the rotor being mounted on the spindle, and the second power unit includes a stator, the stator being fixedly connected to the planetary carrier.

[0017] According to one embodiment of this application, the planetary carrier and the stator are both surrounded by the mandrel, the rotor support is an annular groove recessed along its axial direction, the inner ring of the support is connected to the mandrel, the permanent magnet of the rotor is installed on the outer ring of the support, and the stator is located in the groove formed by the support.

[0018] Secondly, this application provides a mobile device, including: main body; The roller is rotatably connected to the main body; In any of the technical solutions in the first aspect, the geared motor has one of the connecting shaft and the housing fixedly connected to the roller, and the other fixedly connected to the main body.

[0019] The beneficial effects of the mobile device provided in the second aspect of this application are the same as those of the geared motor provided in the first aspect, and will not be repeated here.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the geared motor provided in the embodiment of this application; Figure 2 This is a partial structural schematic diagram of the geared motor provided in an embodiment of this application; Figure 3 This is a partial cross-sectional view of the geared motor provided in an embodiment of this application; Figure 4 This is another partial structural schematic diagram of the geared motor provided in the embodiments of this application; Figure 5 This is a partial exploded structural diagram of the geared motor provided in the embodiments of this application; Figure 6 This is another partial structural schematic diagram of the geared motor provided in the embodiments of this application; Figure 7 This is another partially exploded structural diagram of the geared motor provided in the embodiments of this application.

[0022] Figure label: 100. Geared motor; 110. Housing; 111. Internal gear ring; 120. First power unit; 121. Spindle; 122. Rotor; 1221. Bracket; 1222. Permanent magnet; 130. Second power unit; 140. Sun gear; 150. Planetary carrier; 151. Base plate; 1511. Second mounting hole; 1512. Second reinforcing part; 152. Support part; 153. Limiting part; 154. Second wire guide groove; 160. Planetary gear; 170. Planetary cover; 171. First mounting hole; 172. First reinforcing part; 1721. Connecting hole; 173. Connecting part; 174. First wire guide groove; 180. Connecting shaft; 181. Wire guide hole; 190. Support component. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] The following is for reference. Figures 1-7 A geared motor according to an embodiment of this application is described.

[0025] Please see Figure 1 , Figure 2 and Figure 3 This application provides a geared motor 100, which includes: a housing 110, a first power unit 120, a second power unit 130, a planetary carrier 150, a planetary cover 170, and a connecting shaft 180.

[0026] The inner wall of the outer casing 110 is provided with an internal gear ring 111. A first power unit 120 is installed inside the outer casing 110, and a sun gear 140 is provided on the first power unit 120. A second power unit 130 is installed inside the outer casing 110, and the first power unit 120 and the second power unit 130 can rotate relative to each other. A planet carrier 150 is disposed inside the outer casing 110 and connected to the second power unit 130. A plurality of planet gears 160 are rotatably connected to the planet carrier 150, and the planet gears 160 mesh with the sun gear 140 and the internal gear ring 111, respectively. A planet cover 170 is disposed on the planet carrier 150 to limit the axial movement of the planet gears 160. A connecting shaft 180 passes through the outer casing 110 and is connected to the planet cover 170. The planet cover 170 is integrally formed with at least one of the planet carrier 150 and the connecting shaft 180.

[0027] The outer casing 110 serves as the external support structure for the geared motor 100. It can be made of metal materials such as aluminum alloy and stainless steel, or high-strength engineering plastics. Its shape can be designed as cylindrical, square, or other shapes according to installation requirements. Internally, it houses core components such as the first power unit 120, the second power unit 130, and the planetary carrier 150. An internal gear ring 111 is provided on its inner wall. The internal gear ring 111 has a ring structure with evenly distributed teeth on its inner side. The tooth parameters match those of the planetary gears 160. It can be joined to the outer casing 110 by welding, bolting, or integral molding, providing a meshing basis for the planetary gears 160. Simultaneously, the outer casing 110 protects the internal components from external environmental influences and participates in the speed reduction transmission in conjunction with the internal gear ring 111.

[0028] The first power unit 120 is the core power source of the geared motor 100. The sun gear 140 is a cylindrical gear with teeth on the outer side. The tooth parameters match those of the planet gear 160, and its axis coincides with the overall axis of the geared motor 100. It can be connected to the rotating parts of the first power unit 120 by key connection, welding, or integral molding. It rotates synchronously with the core parts of the first power unit 120, transmitting the power of the first power unit 120 to the planet gear 160.

[0029] The second power unit 130 is installed inside the housing 110, coaxially arranged with the first power unit 120 and rotatable relative to it. At the same time, the second power unit 130 is connected to the planetary carrier 150 and can provide support for the planetary carrier 150. It works with the first power unit 120 to realize the power output basis.

[0030] The planetary carrier 150 is a frame structure, which can be disc-shaped or spoke-shaped, and has multiple mounting positions for mounting planetary gears 160. The planetary carrier 150 is located inside the housing 110, with one end fixedly connected to the second power unit 130 by bolts, welding or interference fit, and the other end rotatably connected to multiple planetary gears 160 through the mounting positions. It can support the planetary gears 160 to maintain a stable rotational trajectory, and at the same time convert the rotational motion of the planetary gears 160 into their own revolution motion, so as to realize the power output transmission.

[0031] Planetary gears 160 are cylindrical gears, and their number is not specifically limited; three, four, or more can be used. When three planetary gears 160 are used, they are arranged in an equilateral triangle. The tooth parameters of the planetary gears 160 are matched with those of the sun gear 140 and the internal gear ring 111, respectively. They are rotatably connected to the mounting position of the planet carrier 150 via bearings or bushings, and maintain meshing with both the sun gear 140 (internal meshing) and the internal gear ring 111 (external meshing). Driven by the sun gear 140, they simultaneously rotate and revolve, transmitting power from the sun gear 140 to the planet carrier 150 to achieve speed reduction and torque increase.

[0032] The planet cover 170 can be a disc-shaped structure or a slat-shaped structure, etc., and its size is adapted to the planet carrier 150. It is placed on the planet carrier 150 and is connected to the planet carrier 150 by bolts, snap-fit, or integral molding. It limits the planet gear 160 in the axial direction to prevent the planet gear 160 from moving in the axial direction and ensures stable meshing between the planet gear 160, the sun gear 140, and the internal gear ring 111.

[0033] The connecting shaft 180 is a cylindrical shaft made of high-strength metal material. One end of it has a connecting structure, such as threads or keyways. The connecting shaft 180 passes through the end through hole of the housing 110, and the other end is fixedly connected to the planetary cover 170 by welding, threaded connection, or integral molding. It transmits the torque of the planetary cover 170 and the planetary carrier 150 to the external load, serving as the power transmission shaft of the geared motor 100.

[0034] In some examples, the first power unit 120 can be a rotor 122 (which may include a rotor 122 core and a permanent magnet 1222), and the second power unit 130 can be a stator (which may include a stator core and windings). The two are coaxially arranged and can rotate relative to each other. The stator is fixed inside the housing 110, and the rotor 122 can rotate relative to the stator. The sun gear 140 is mounted on the rotor 122 and rotates synchronously with it. Based on this, the geared motor 100 has two power output modes: Firstly, the connecting shaft 180 serves as the power output: The outer casing 110 remains stationary, and the internal gear ring 111 remains relatively stationary with respect to the outer casing 110. When the stator is energized and generates a rotating magnetic field, the rotor 122 (first power unit 120) drives the sun gear 140 to rotate under the influence of the magnetic field. The sun gear 140 drives the planet gears 160 to rotate on their own axes and revolve around the internal gear ring 111. The planet gears 160 transmit power to the connecting shaft 180 through the planet carrier 150 and the planet cover 170, and finally, the connecting shaft 180 outputs the decelerated rotational power outward. At this time, the connecting shaft 180 serves as the output end, connecting to an external load (such as the transmission components of a wheel hub) to realize power transmission.

[0035] Secondly, the outer casing 110 serves as the power output: The connecting shaft 180 is fixed (e.g., connected to a fixed structure such as a vehicle frame), and the planetary cover 170 is integrally formed or fixedly connected to the connecting shaft 180, thus constraining the revolution of the planetary carrier 150 and the planetary gears 160. When the stator is energized and drives the rotor 122 (first power unit 120) to rotate the sun gear 140, the planetary gears 160, while rotating on their own axis, cannot revolve with the planetary carrier 150. Instead, they drive the internal gear ring 111 and the outer casing 110 to rotate as a whole through meshing with the internal gear ring 111. At this time, the outer casing 110, as the output end, directly drives the external load (such as a wheel hub) to rotate, thereby realizing power output.

[0036] The planetary cover 170 is integrally formed with at least one of the planet carrier 150 and the connecting shaft 180, which can be achieved through processes such as casting, forging, or 3D printing. Specifically, in some examples, the planetary cover 170 and the planet carrier 150 are integrally formed, and the connecting shaft 180 is connected to the planetary cover 170 by threads or bolts; in other examples, the planetary cover 170 and the connecting shaft 180 are integrally formed and connected to the planet carrier 150 by bolts; in still other embodiments, the planetary cover 170, the planet carrier 150, and the connecting shaft 180 are integrally formed to form a complete transmission component. This integral forming design can reduce the number of parts, avoid assembly errors, and improve the accuracy and strength of the overall structure.

[0037] According to the geared motor 100 provided in the embodiments of this application, by integrally molding the planetary cover 170 with at least one of the planetary carrier 150 and the connecting shaft 180, the following advantages are achieved: First, it improves product precision, as the integral molding avoids the cumulative errors generated during the assembly of multiple parts, ensuring the meshing accuracy of the planetary gear 160 with the sun gear 140 and the internal gear ring 111, and reducing transmission noise and wear; second, it enhances structural strength, as the integral molding structure eliminates the weak link at the part connection 173, improving the overall torsional resistance and service life; third, it reduces production costs, as it reduces the number of parts, simplifies the assembly process, reduces material and labor costs, and improves production efficiency; and fourth, it optimizes transmission stability, reducing the relative movement gap between parts, making power transmission smoother and the output torque more stable.

[0038] Please see Figure 2 and Figure 3 According to some embodiments of this application, the planetary cover 170 and the planet carrier 150 can be integrally formed, and the connecting shaft 180 and the planetary cover 170 can be detachably connected.

[0039] The planetary cover 170 and the planetary carrier 150 are integrally molded. This integral molding can be achieved through processes such as casting, forging, or 3D printing, forming an inseparable whole structure. With integral molding, there is no assembly gap between the planetary cover 170 and the planetary carrier 150, which provides more stable axial positioning of the planetary gear 160. It also enhances the overall structural strength and rigidity of the planetary carrier 150 and planetary cover 170, preventing issues such as transmission accuracy being affected by loose connections.

[0040] There are several ways to detachably connect the connecting shaft 180 and the planetary cover 170. In some examples, the connecting shaft 180 and the planetary cover 170 can be connected by bolts. Specifically, to improve the connection strength, the end of the connecting shaft 180 near the planetary cover 170 can have a polygonal portion, and the planetary cover 170 has a matching polygonal groove on the side facing the connecting shaft 180. The polygonal portion is installed in the polygonal groove and is fixedly connected to the polygonal portion by bolts passing through the sidewall of the polygonal groove from the outside to the inside. The number of bolts can correspond to the number of sides of the polygonal portion. In other examples, the connecting shaft 180 and the planetary cover 170 can be connected by an interference fit. Similarly, a polygonal portion can be provided at the end of the connecting shaft 180 near the planetary cover 170, and a polygonal groove can be provided on the side of the planetary cover 170 facing the connecting shaft 180, with the polygonal portion and the polygonal groove having an interference fit. In other examples, threaded connections, keyed connections, snap-fit ​​connections, etc., can also be used, but these will not be elaborated on in detail.

[0041] The planetary cover 170 and the planetary carrier 150 are integrally formed, while the connecting shaft 180 and the planetary cover 170 are detachable. This means that when the connecting shaft 180 is damaged or needs to be replaced with a connecting shaft 180 of a different specification, it is not necessary to replace the entire planetary carrier 150 and planetary cover 170 assembly, thus reducing maintenance costs and parts replacement costs.

[0042] Please see Figure 3 and Figure 4 According to some embodiments of this application, the planetary carrier 150 may include a base plate 151 and a plurality of support portions 152 disposed on the base plate 151. The base plate 151 may be connected to the second power unit 130, and the planetary cover 170 may be connected to one end of the plurality of support portions 152 away from the base plate 151.

[0043] The planetary carrier 150 includes a base plate 151 and multiple support parts 152. The base plate 151 is a plate-shaped structure and can be circular, polygonal, or similar. The base plate 151 serves as the basic structure of the planetary carrier 150, providing an installation carrier for the support parts 152. It is also fixedly connected to the second power unit 130 (stator), providing stable support for the entire planetary carrier 150 and related components.

[0044] Multiple support parts 152 are disposed on the base plate 151. The number of support parts 152 is not specifically limited; three, four, or more can be provided, and their number is adapted to the number of planetary gears 160. For example, when there are three planetary gears 160, three support parts 152 can be provided accordingly. The support parts 152 are supported between the base plate 151 and the planetary cover 170, and are in the form of a column, plate, or block shape. One end of the support part is integrally connected to the base plate 151, and the other end is integrally connected to the planetary cover 170. The support parts 152 connect the base plate 151 and the planetary cover 170, forming a stable frame structure, while separating adjacent planetary gears 160 to prevent mutual interference between the planetary gears 160 during operation, ensuring that each planetary gear 160 has an independent and stable operating space.

[0045] Planetary gear 160 is disposed between base plate 151 and planetary cover 170, and located within the interval area formed by adjacent support parts 152. Planetary cover 170, through its integral connection with support parts 152, works in conjunction with base plate 151 to axially limit planetary gear 160, preventing axial movement. When assembling or disassembling planetary gear 160, the operation can be performed through the interval space between two adjacent support parts 152 without affecting normal assembly and maintenance.

[0046] Please see Figure 3 and Figure 4 According to some embodiments of this application, the planetary cover 170 may be provided with a plurality of first mounting holes 171, and the base plate 151 may be provided with a plurality of second mounting holes 1511 corresponding to the plurality of first mounting holes 171. The two ends of the axle of the planetary gear 160 are respectively provided in the first mounting holes 171 and the second mounting holes 1511.

[0047] The planetary cover 170 is provided with a plurality of first mounting holes 171, the number of which matches the number of planetary gears 160. The first mounting holes 171 can be through holes penetrating the thickness direction of the planetary cover 170 or blind holes, and can be circular in shape, with their inner diameter matching the outer diameter of one end of the planetary gear 160 axle to ensure stable mounting of the axle within the hole. In some examples, the planetary gear 160 axle and the first mounting hole 171 can be an interference fit to ensure connection stability. The positions of the first mounting holes 171 correspond to the interval areas formed by adjacent support portions 152, such that each first mounting hole 171 corresponds to a mounting position of a planetary gear 160, thereby providing a mounting support point for one end of the planetary gear 160 axle. The base plate 151 has multiple second mounting holes 1511, which correspond one-to-one with the first mounting holes 171, are the same in number, and are aligned with each other. The second mounting holes 1511 can also be through holes or blind holes, are circular in shape, and have an inner diameter that matches the outer diameter of the other end of the planetary gear 160 axle. In some examples, the planetary gear 160 axle and the second mounting holes 1511 can also be an interference fit to ensure connection stability. Since the base plate 151, the support part 152, and the planetary cover 170 form a stable frame structure, the second mounting holes 1511 provide reliable mounting support for the other end of the planetary gear 160 axle, and work together with the first mounting holes 171 to position the planetary gear 160 axle.

[0048] It is understandable that when the first mounting hole 171 is a blind hole, the second mounting hole 1511 must be a through hole so that after the planetary gear 160 is placed in the space, the gear shaft can be assembled in the order of passing through the second mounting hole 1511, the shaft hole of the planetary gear 160 and the first mounting hole 171, and vice versa.

[0049] The first mounting hole 171 and the second mounting hole 1511 provide precise mounting positioning for the axle of the planetary gear 160, ensuring the positional accuracy of the planetary gear 160 between the base plate 151 and the planetary cover 170. This allows the planetary gear 160 to accurately mesh with the sun gear 140 and the internal gear ring 111, reducing deviations and noise during transmission. Simultaneously, this mounting method simplifies the assembly of the planetary gear 160; simply inserting the axle into the mounting hole improves assembly efficiency. The axle is supported at both ends, enhancing the stability of the planetary gear 160 during operation, reducing the probability of damage to the axle due to uneven stress, extending the service life of the planetary gear 160, and thus improving the overall reliability of the geared motor 100.

[0050] Please see Figure 3 , Figure 4 and Figure 5 It should be noted that, Figure 5 The second power unit is not shown. According to some embodiments of this application, the planetary cover 170 is provided with a plurality of first reinforcing parts 172 on the side opposite to the planet carrier 150. The plurality of first reinforcing parts 172 correspond one-to-one with a plurality of first mounting holes 171, and one end of the first mounting hole 171 extends into the first reinforcing part 172.

[0051] The planetary cover 170 has multiple first reinforcing parts 172 on the side opposite to the planet carrier 150. Specifically, the first reinforcing parts 172 are located on the side of the planetary cover 170 away from the base plate 151 and the planetary gear 160. The number of first reinforcing parts 172 is the same as the number of first mounting holes 171, and they correspond one-to-one; that is, each first mounting hole 171 is equipped with a corresponding first reinforcing part 172. The structure of the first reinforcing part 172 can be boss-shaped, rib-shaped, or block-shaped, etc., and its material is the same as that of the planetary cover 170. It can be integrally formed with the planetary cover 170, for example, through casting, forging, or other processes.

[0052] One end of the first mounting hole 171 extends into the first reinforcing part 172. That is, the first mounting hole 171 is not limited to the thickness of the planet cover 170 body, but extends into the first reinforcing part 172, increasing the depth of the first mounting hole 171. Since the first reinforcing part 172 itself has a certain thickness, this increases the length of the hole section in the first mounting hole 171 used to accommodate one end of the planet gear 160 axle.

[0053] The first reinforcing part 172 enhances the structural strength and rigidity of the planetary cover 170 in the area surrounding the first mounting hole 171. When the planetary gear 160 rotates, the axle generates radial and axial forces on the wall of the first mounting hole 171. Especially during power transmission, this area experiences concentrated forces. The first reinforcing part 172 effectively resists these forces, preventing deformation or damage to the planetary cover 170 near the first mounting hole 171. Simultaneously, the first mounting hole 171 extends into the first reinforcing part 172, increasing the mating length between the axle and the first mounting hole 171, making the axle installation more stable, reducing axle wobble during rotation, and further ensuring the stability of the planetary gear 160's operation.

[0054] Please see Figure 4 and Figure 5 According to some embodiments of this application, the first reinforcing part 172 is provided with a communicating hole 1721 communicating with the first mounting hole 171, and the diameter of the communicating hole 1721 is smaller than the diameter of the first mounting hole 171.

[0055] The inner diameter of the connecting hole 1721 in the first reinforcing part 172 is smaller than the diameter of the first mounting hole 171, forming a stepped transition between the two. This prevents the planetary gear 160 axle from protruding through the connecting hole 1721 when assembled from one side of the second mounting hole 1511, thus improving the overall structural strength and assembly stability. Furthermore, when disassembling the axle, it can be pushed out through the connecting hole 1721 using a disassembly tool, facilitating the disassembly of the planetary gear 160.

[0056] Please see Figure 6 and Figure 7According to some embodiments of this application, the connecting shaft 180 and the planetary cover 170 are integrally formed, and the planetary cover 170 and the planet carrier 150 are detachably connected.

[0057] The connecting shaft 180 and the planetary cover 170 are integrally formed, and can be manufactured into a single structure using processes such as casting, forging, or 3D printing. The connecting shaft 180 is made of high-strength metal material, and the planetary cover 170 is made of the same or compatible material as the connecting shaft 180 to ensure the structural strength and stability after the two are integrally formed. This integral forming design eliminates assembly gaps between the connecting shaft 180 and the planetary cover 170, ensuring synchronous movement of both, improving the efficiency and precision of power transmission, and enhancing the torsional resistance of the connecting part 173, thus preventing malfunctions caused by loose connections.

[0058] The planetary cover 170 and the planetary carrier 150 are detachably connected. The detachable connection can be made in various ways. In some examples, it can be a bolt connection, with corresponding bolt holes provided on the planetary cover 170 and the planetary carrier 150, and the two are fixed by bolts. In other examples, it can also be a snap-fit ​​connection, with snap-fits provided on the edge of the planetary cover 170 and corresponding slots provided on the planetary carrier 150, and the connection and disassembly can be achieved by the cooperation of the snap-fits and the slots.

[0059] Please see Figure 6 and Figure 7 According to some embodiments of this application, the planetary carrier 150 may include a base plate 151 and a plurality of support portions 152 disposed on the base plate 151. The base plate 151 is connected to the second power unit 130. The planetary cover 170 includes a plurality of connecting portions 173 corresponding one-to-one with the plurality of support portions 152. The connecting portions 173 are connected to the support portions 152 respectively.

[0060] The planetary carrier 150 includes a base plate 151 and multiple support parts 152. Referring to the aforementioned embodiments, the details will not be repeated here.

[0061] The planetary cover 170 includes multiple connecting portions 173, the number of which corresponds one-to-one with the number of supporting portions 152. Their structures are adapted to the structures of the supporting portions 152, and the connecting portions 173 are generally plate-shaped, allowing them to axially block at least a portion of the planetary gear 160, thus limiting the axial movement of the planetary gear 160. The connecting portions 173 are connected to the supporting portions 152, and the connection can be achieved by bolting, with bolt holes corresponding to the connecting portions 173 and the supporting portions 152 for fixing; or by snap-fit ​​connection, with snap-fit ​​on the connecting portions 173 and slots on the supporting portions 152; or by pin connection, etc., to achieve a detachable connection between the planetary cover 170 and the planetary carrier 150.

[0062] The function of the corresponding connection between the connecting part 173 and the supporting part 152 is to ensure the stability and accuracy of the connection between the planet cover 170 and the planet carrier 150. Through the one-to-one corresponding connection relationship, the planet cover 170 can be accurately placed on the planet carrier 150, forming a reliable axial limit for the planet gear 160. At the same time, it facilitates the disassembly and installation of the planet cover 170, and provides convenience for the maintenance and replacement of the planet gear 160.

[0063] It should be noted that in this embodiment, one end of the axle of the planetary gear 160 is interference-fitted with the second mounting hole 1511 on the base plate 151, and the other end is provided with a retaining ring for limiting the bearing. When assembling the planetary gear 160, the axle can be inserted into the second mounting hole 1511 from one end of the planetary gear 160 to complete the assembly of the planetary gear 160.

[0064] Please see Figure 7 In some embodiments, the base plate 151 is provided with a plurality of second reinforcing parts 1512 corresponding to a plurality of second mounting holes 1511. The second reinforcing parts 1512 are arranged in a ring along the periphery of the second mounting holes 1511 to enhance the structural strength of the base plate 151 and increase the assembly strength and assembly stability of the planetary gear 160.

[0065] Please see Figure 6 and Figure 7 According to some embodiments of this application, a limiting part 153 may be provided at one end of the support part 152 near the connecting part 173, and the connecting part 173 and the limiting part 153 abut and limit each other in the radial direction of the connecting shaft 180.

[0066] A limiting part 153 is provided at one end of the support part 152 near the connecting part 173. The limiting part 153 is a structure with a limiting function provided at the end of the support part 152, and its form is varied. Specifically, the support part 152 is generally columnar, and the connecting part 173 is connected to the end surface of the support part 152. The limiting part 153 can be a baffle perpendicular to the end plane of the support part 152; or it can be a stepped protrusion provided at the end of the support part 152, etc. The limiting part 153 and the support part 152 can be integrally formed, such as by casting or forging processes, or it can be fixedly connected to the support part 152 by welding or other methods. Its material is the same as that of the support part 152 to ensure structural strength.

[0067] In some examples, the support portion 152 is arranged near the periphery of the base plate 151, and the surface of the support portion 152 away from the axis of the planetary carrier 150 matches the outer edge of the base plate 151. The limiting portion 153 may be a strip-shaped protrusion provided at one end of the support portion 152 away from the base plate 151, and the strip-shaped protrusion is arranged along the outer edge of the support portion 152 away from the axis of the planetary carrier 150. The connecting portion 173 may be a plate-like structure extending radially along the connecting shaft 180, and the end of the connecting portion 173 away from the connecting shaft 180 abuts against the side of the limiting portion 153 facing the connecting shaft 180.

[0068] The function of this radial abutment limit is to prevent the connecting part 173 and the support part 152 from radially offset, ensuring the concentricity of the planet cover 170 and the planet carrier 150, and ensuring the precise radial meshing position of the planet gear 160, the sun gear 140, and the internal gear ring 111, avoiding poor meshing caused by radial misalignment, while also enhancing the overall radial stability of the connection between the planet cover 170 and the planet carrier 150. Furthermore, during assembly, the limit part 153 provides a positioning reference for the connecting part 173, facilitating the quick and accurate assembly of the planet cover 170.

[0069] Please see Figure 6 and Figure 7 According to some embodiments of this application, the planetary cover 170 is connected to the end of the connecting shaft 180 near the planet carrier 150.

[0070] Please see Figure 5 , Figure 6 and Figure 7 According to some embodiments of this application, the side wall of the connecting shaft 180 near the planetary cover 170 is provided with a wire passage hole 181, the planetary cover 170 is provided with a first wire passage groove 174 corresponding to the wire passage hole 181, and the planet carrier 150 is provided with a second wire passage groove 154 corresponding to the first wire passage groove 174.

[0071] A wire-passing hole 181 is provided on the side wall of the connecting shaft 180 near the planetary cover 170. The wire-passing hole 181 is a through hole formed on the side wall of the connecting shaft 180, and its shape can be set to circular, elliptical, or rectangular, etc., depending on the number and diameter of the wires. Since the wires pass through the middle of the connecting shaft 180 into the motor, the wire-passing hole 181 connects the internal channel of the connecting shaft 180 with the outside, allowing the wires to pass out from inside the connecting shaft 180. The position of the wire-passing hole 181 is close to the planetary cover 170 so that the wires can be smoothly connected to the subsequent first wire-passing groove 174.

[0072] The planetary cover 170 is provided with a first wire guide groove 174, which corresponds to the wire guide hole 181, i.e., its position matches the wire guide hole 181, and it can receive the wire passing through the wire guide hole 181. The first wire guide groove 174 can be a groove formed on the surface of the planetary cover 170. Specifically, its extension direction extends from the side near the wire guide hole 181 towards the periphery of the planetary carrier 150. In some examples, it can extend radially along the planetary carrier 150. The depth and width of the first wire guide groove 174 are designed according to the specifications of the wire to accommodate and limit the wire, preventing the wire from shifting during equipment operation. In some examples, the first wire guide groove 174 can be a through groove penetrating the bottom of the planetary cover 170.

[0073] The planetary carrier 150 is provided with a second wire guide groove 154, which corresponds to and is positioned to connect with the first wire guide groove 174, receiving the wires led out from the first wire guide groove 174. The second wire guide groove 154 can also be a groove formed on the surface of the planetary carrier 150, extending from the side near the planetary cover 170 towards the underside of the base plate 151 of the planetary carrier 150, ultimately leading to the circuit board mounted under the base plate 151. The groove's size is adapted to the wire specifications, ensuring smooth wire passage and connection to the circuit board. In some examples, the second wire guide groove 154 is located on the surface of the support 152 near the edge of the base plate 151 to avoid interference between the wires and the planetary gears 160, ensuring operational stability.

[0074] Please see Figure 6 and Figure 7 In some embodiments, a support member 190 may be provided on the top of the first wire guide groove 174. The support member 190 is fixed to the surface of the planetary cover 170 by screws to improve the stability of the wiring assembly and prevent wire displacement. Furthermore, the support member 190 may at least partially pass through the wire guide hole 181 and enter the interior of the connecting shaft 180, which can serve as a stop and guide during wiring assembly.

[0075] Please see Figure 7 According to some embodiments of this application, the first power unit 120 may include a spindle 121 and a rotor 122. The spindle 121 is rotatably connected to the housing 110. The sun gear 140 and the rotor 122 are mounted on the spindle 121. The second power unit 130 includes a stator, which is fixedly connected to the planet carrier 150.

[0076] The first power unit 120 includes a spindle 121 and a rotor 122. The spindle 121 is a cylindrical shaft made of high-strength metal material (such as alloy steel), which has good wear resistance and torsional resistance. The spindle 121 is rotatably connected to the housing 110. The connection method can be a bearing connection, that is, a bearing seat is provided on the housing 110, and the spindle 121 is mounted in the bearing seat through the bearing, so that the spindle 121 can rotate flexibly relative to the housing 110.

[0077] The sun gear 140 and rotor 122 are mounted on the spindle 121. The sun gear 140 can be fixed to the spindle 121 by means of key connection, interference fit, or integral molding, and rotates synchronously with the spindle 121. The rotor 122 is also fixedly mounted on the spindle 121, and can be arranged adjacent to or spaced apart from the sun gear 140. The rotor 122 typically includes a rotor core and permanent magnets 1222. The permanent magnets 1222 are evenly distributed on the outer circumference of the rotor core and generate a rotating magnetic field as the spindle 121 rotates. The sun gear 140 and rotor 122 are coaxially mounted on the spindle 121 to ensure the synchronicity of their movements, so that the power generated by the rotor 122 can be directly transmitted to the sun gear 140 through the spindle 121.

[0078] The second power unit 130 includes a stator, which consists of a stator core and windings. The stator core can be made of laminated silicon steel sheets, and the windings are wound in slots in the stator core. When current is applied, a rotating magnetic field is generated. The stator is fixedly connected to the planetary carrier 150, and the connection method can be bolted, welded, or interference fit, so that the stator and the planetary carrier 150 form an integral structure with no relative movement between them. As a stationary electromagnetic component, the stator cooperates with the rotor 122 to generate electromagnetic force, driving the rotor 122 and the spindle 121 to rotate.

[0079] Please see Figure 7 According to some embodiments of this application, the planetary carrier 150 and the stator are both surrounding the spindle 121. The support 1221 of the rotor 122 is an annular groove recessed along its axial direction. The inner ring of the support 1221 is connected to the spindle 121. The permanent magnet 1222 of the rotor 122 is installed on the outer ring of the support 1221. The stator is located in the groove formed by the support 1221.

[0080] The planetary carrier 150 and the stator are both surrounding the spindle 121, meaning the spindle 121 is at the center. The planetary carrier 150 is arranged in a ring around the spindle 121, and the stator is also arranged around the spindle 121 and fixedly connected to the planetary carrier 150. This makes the entire electromagnetic drive part and the mechanical transmission part form a concentric circle structure around the spindle 121, with a compact layout and high coaxiality.

[0081] The rotor 122's support 1221 is an annular groove recessed along its axial direction, forming an overall concave annular structure. The groove formed by its axial concavity is an annular space. The inner ring of the support 1221 is connected to the spindle 121, and the connection method can be interference fit, key connection, or welding, ensuring that the support 1221 rotates synchronously with the spindle 121. The outer ring of the support 1221 is used to install permanent magnets 1222. The permanent magnets 1222 can be fixed to the outer circumferential surface of the outer ring of the support 1221 by means of bonding, snap-fit, or bolt connection, and are evenly distributed along the circumferential direction to form a complete annular magnetic circuit.

[0082] The stator is located within the groove formed by the support 1221, that is, the stator is embedded in the axial recessed area of ​​the rotor 122 support 1221. The outer diameter of the stator matches the inner diameter of the groove, and a certain air gap (electromagnetic gap) is maintained between them. This ensures that effective electromagnetic induction can be generated between the stator and the rotor 122, while avoiding mechanical interference between them during rotation. The stator is fixedly connected to the planetary carrier 150 and moves synchronously with the planetary carrier 150 or remains stationary. Its position is restricted within the groove, further improving the compactness of the structure.

[0083] The annular groove structure of the rotor 122 bracket 1221 provides a space for the stator, allowing the permanent magnets 1222 of the stator and rotor 122 to be arranged opposite each other in the radial direction, maximizing the electromagnetic coupling area and improving the electromagnetic conversion efficiency. At the same time, this nested structure significantly shortens the axial length of the motor, making the overall structure more compact, especially suitable for hub motor scenarios with strict space requirements.

[0084] This application also provides a mobile device, which includes: a main body, a roller, and a geared motor 100 as described in any of the above technical solutions.

[0085] It should be noted that since the mobile device provided in this application embodiment includes the geared motor 100 of any of the above technical solutions, it has the technical features and beneficial effects of the geared motor 100 of any of the above technical solutions, which will not be repeated here.

[0086] The roller is rotatably connected to the main body; one of the connecting shaft 180 and the housing 110 is fixedly connected to the roller, and the other is fixedly connected to the main body.

[0087] The main body serves as the fundamental load-bearing structure for mobile devices. It can be designed in different shapes depending on the device type, such as a vehicle frame or a robot body. It houses the rollers, geared motor 100, and other functional components, such as batteries and control systems, providing support and a stable mounting platform for the entire device. The main body can be made of materials such as metal alloys or high-strength plastics to meet structural strength and lightweight requirements.

[0088] The rollers are rotatably connected to the main body, typically via bearings, bushings, or other rotating components, allowing them to rotate flexibly around their own axis and enabling the mobile device to move. The number of rollers is not limited and is determined according to requirements.

[0089] One of the connecting shaft 180 and the housing 110 is fixedly connected to the roller, and the other is fixedly connected to the main body. Specifically, there are two connection methods: the first is that the connecting shaft 180 is fixedly connected to the roller, and the housing 110 is fixedly connected to the main body. In this case, the geared motor 100 transmits power to the roller through the connecting shaft 180, driving the roller to rotate. The second is that the housing 110 is fixedly connected to the roller, and the connecting shaft 180 is fixedly connected to the main body. In this case, the geared motor 100 drives the roller to rotate through the housing 110. Both connection methods can achieve relative rotation between the roller and the main body, thereby driving the mobile device to move.

[0090] When the connecting shaft 180 is fixedly connected to the roller and the housing 110 is fixedly connected to the main body, the housing 110 of the geared motor 100 is fixed to the main body and cannot move. When the geared motor 100 is working, its internal power transmission structure causes the connecting shaft 180 to rotate. Since the connecting shaft 180 is fixed to the roller, the rotation of the connecting shaft 180 drives the roller to rotate relative to the main body, thereby propelling the mobile device forward, backward, or turning. In this method, power is directly transmitted to the roller through the connecting shaft 180, resulting in a short transmission path and rapid response. When the housing 110 is fixedly connected to the roller and the connecting shaft 180 is fixedly connected to the main body, the connecting shaft 180 of the geared motor 100 is fixed to the main body and its position remains unchanged. When the geared motor 100 is working, its internal structure causes the housing 110 to rotate. Since the housing 110 is fixedly connected to the roller, it drives the roller to rotate relative to the main body, thereby realizing the movement of the mobile device. In this method, the housing 110 directly drives the roller to rotate, and the power transmission is more direct, which is especially suitable for scenarios with high requirements for structural compactness.

[0091] The mobile device employs the aforementioned geared motor 100. Through different fixing methods between the connecting shaft 180 and the housing 110 and the rollers and main body, it can flexibly adapt to different installation requirements and usage scenarios, improving the flexibility of the device design. The geared motor 100 itself has advantages such as compact structure, high transmission precision, and stable power output, providing a stable driving force for the rollers, ensuring smooth operation of the mobile device and reducing bumps and vibrations. Simultaneously, the geared motor 100's reduction and torque amplification function enables the rollers to obtain greater torque, improving the mobile device's load-bearing capacity and climbing ability, adapting to different road conditions. Whether it's a small robot, an electric scooter, or other mobile device, this structural design can provide reliable power support and good operational performance.

[0092] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0093] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0094] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0095] In the description of this application, "multiple" means two or more.

[0096] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0097] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A reduction motor characterized by, The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device. The application relates to a planetary gear device.

2. The reduction gear motor according to claim 1, characterized by The application relates to a planetary gear device.

3. The reduction gear motor according to claim 2, characterized in that, The application relates to a planetary gear device.

4. The reduction gear motor according to claim 3, characterized in that, The application relates to a planetary gear device.

5. The reduction gear motor according to claim 4, characterized in that, The application relates to a planetary gear device.

6. The reduction gear motor according to claim 5, characterized in that, The application relates to a planetary gear device.

7. The gear motor of claim 1, wherein The application relates to a planetary gear device.

8. The reduction gear motor according to claim 7, characterized in that, The application relates to a planetary gear device.

9. The reduction gear motor according to claim 8, characterized in that, The application relates to a planetary gear device.

10. The reduction gear motor according to any one of claims 1 to 9, characterized by, The application relates to a planetary gear device.

11. The reduction gear motor according to any one of claims 1 to 9, characterized by, The application relates to a planetary gear device.

12. The reduction gear motor according to any one of claims 1 to 9, characterized by, The application relates to a planetary gear device.

13. The reduction gear motor according to claim 12, characterized in that, The application relates a planetary gear device.

14. A mobile device, comprising: The application relates to a planetary gear device. The application relates to a planet gear device. The application relates to a planet gear device. The application relates to a planet gear. The application relates to a planet gear. The application relates to a planet gear. The application provides a planet gear. The application provides a planet gear. The application provides a planet gear. The planet gear comprises a main body, a roller and a connecting rod. The planet gear comprises a main body, a roller and a connecting rod. The planet gear is characterized in that the roller is connected to the main body through the connecting rod. The planet gear is characterized in that the roller is connected to the main body through a connecting rod. The planet gear is characterized in that the roller is connected to the main body. The planet gear is characterized in that the roller is connected to the main body. The planet is characterized in that the roller is connected to the main body. The planet gear is characterized in the roller. The planet gear is characterized in the roller. The planet gear is characterized in the roller. A planet gear is provided. A planet gear is provided. A planet gear is provided. A planet gear is provided. The planet gear is characterized in that the roller is connected to the main body. The planet gears are characterized in that the rollers are connected to the main bodies. The planet gears are characterized in that the rollers are connected to the main bodies. The planet gear is characterized in that the roller is connected to the main body. The planet gearing is characterized in that the roller is connected to the main body. The planet gearing is characterized in the roller. The planet gearing is characterized in the roller. The planet gearing is characterized in the roller. A planet gear is provided. A planet gear is provided. A planetary gear device is provided. A planet gear is provided. A planet gear is provided. A planet gear is characterized in that the roller is connected to the main body. A planet gear is characterized in that the roller is connected to the main body. A planet gearing is characterized in that the roller is connected to the main body. A planet gearing is characterized in the roller. A planet gearing is characterized in the roller. A planet gearing is characterized in the roller. The planet gearing is characterized in that the roller is connected to the main body. The planet gear is characterized in a planet gear. The planet gear is characterized in a planet gear. The planet gear is characterized in a planet gearing. The planet gear is characterized in a planet gearing. The planet gear is characterized in a planet gear. The planet gear is characterized in a planet. The planet gear is characterized in a planet. The planet gear is characterized in a planet. A planet gear is provided. A planet gear is provided. A planet gear is provided. The speed reduction motor as claimed in any one of claims 1-13, one of the connecting shaft and the housing is fixedly connected with the roller, and the other is fixedly connected with the main body.

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