High-reliability hub motor with integrated structure

Abstract

The invention relates to a high-reliability hub motor with an integrated structure, and the motor comprises a support module which comprises a connecting box, and the connecting box is connected with a flexible circulating pipe; the power source module is mounted on the connecting box; the motion module comprises a planet gear speed reducer, the planet gear speed reducer is rotationally connected to the connecting box, and the power source module is matched with the planet gear speed reducer; the planet wheel speed reducer is provided with a track wheel at the output end, the circulating pipe is located in a gap between the outer side face of the track wheel and the inner wall face of the connecting box, two end openings of the circulating pipe extend into the planet wheel speed reducer, extrusion blocks are arranged on the outer side face of the track wheel, the gap has the interval difference, and the extrusion blocks intermittently extrude the circulating pipe. Through rotation of the track wheel, the extrusion block intermittently extrudes the circulating pipe, and circulation of a lubricating agent in the circulating pipe and the planetary gear speed reducer is achieved.

Description

Technical Field

[0001] This application relates to the field of hub motors, and in particular to a high-reliability hub motor with an integrated structure. Background Technology

[0002] An electric bicycle is a power-assisted bicycle that uses an electrical system to manage and control the entire vehicle's drive, enabling manual, electric, or electric-assisted riding. Electric bicycles require a motor to drive the wheels for automatic forward movement. To improve motor integration, existing motors and reducers are integrated into the wheel hub, reducing the footprint of the motor and reducer and enhancing aesthetics.

[0003] Speed ​​reducers typically achieve speed reduction through the meshing of gears with a difference in the number of teeth. To reduce gear wear, lubricant is filled between the gears. However, in existing hub motors, since the motor and speed reducer are integrated into the hub, replacing the lubricant in the speed reducer is quite cumbersome. Summary of the Invention

[0004] Therefore, it is necessary to address the issue of increasing the floor space required for motors and reducers.

[0005] This application provides a high-reliability hub motor with an integrated structure, comprising: The support module includes a connecting box, on which a flexible circulation tube is connected; The power source module is installed on the connection box; The motion module includes a planetary gear reducer, which is rotatably connected to the connecting box. The power source module cooperates with the planetary gear reducer. The planetary gear reducer has an output track wheel. The circulation tube is located in the gap between the outer side of the track wheel and the inner wall of the connecting box, and both ends of the circulation tube extend into the planetary gear reducer. An extrusion block is provided on the outer side of the track wheel. The gap has a spacing difference, and the extrusion block intermittently extrudes the circulation tube.

[0006] In one embodiment, the connecting box has a circumferential sidewall, the planetary gear reducer is located within the space formed by the sidewall, and the inner wall surface of the sidewall has a recessed groove.

[0007] In one embodiment, the recessed groove has a snap-fit ​​for securing the circulation tube.

[0008] In one embodiment, the extrusion block has a slope that contacts the circulation pipe, and the slope gradually approaches the outer surface of the track wheel along the rotation direction of the track wheel.

[0009] In one embodiment, the planetary gear reducer includes a track wheel, at least two gear sets, and a sun gear. The track wheel, gear sets, and sun gear mesh sequentially. The connecting box has a column, and the displacement of the column corresponds to the distance between the two gear sets.

[0010] In one embodiment, the track wheel has a receiving cavity, the cavity wall of which is provided with internal circular teeth that cooperate with the gear set, and the column extends into the receiving cavity.

[0011] In one embodiment, the column includes a first column located outside the receiving cavity and a second column located inside the receiving cavity, with a step-like structure between the first column and the second column, and a portion of the projection of the first column located outside the inner circular teeth.

[0012] In one embodiment, the column has an installation hole for the circulation pipe to pass through. One end of the installation hole is located on the outer side of the first column, and the other end of the installation hole is located on the inner side of the second column.

[0013] In one embodiment, a partition is provided in the side wall to divide the space formed by the side wall into two cavities. One cavity accommodates the planetary gear reducer, and the other cavity is used to accommodate the power source module. The rotor of the power source module is connected to the sun gear through a shaft passing through the partition.

[0014] In one embodiment, the motion module further includes a sprocket that cooperates with a track wheel and rotates with the track wheel.

[0015] The aforementioned integrated hub motor utilizes the rotation of the track wheel to intermittently compress the circulation pipe with extrusion blocks, enabling the fluid to flow within the pipe. Since both ends of the circulation pipe extend into the planetary gear reducer, one end draws in lubricant from the reducer, while the other end replenishes it, thus circulating the lubricant within both the pipe and the reducer and ensuring its fluidity. The circulation pipe also allows for the replacement of the lubricant within the reducer, or for the extraction and processing of the lubricant to ensure its cleanliness. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the internal structure of a high-reliability hub motor provided in an embodiment of this application, viewed from a first perspective.

[0017] Figure 2 This is a three-dimensional structural diagram of the internal structure of a high-reliability hub motor provided in an embodiment of this application, viewed from a second perspective.

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0019] Figure 4This is a partial structural diagram of the internal structure of a high-reliability hub motor provided in an embodiment of this application.

[0020] Figure 5 This is a three-dimensional structural diagram of the connecting box and circulation pipe provided in an embodiment of this application.

[0021] Figure 6 This is a three-dimensional structural diagram of a connecting box provided in an embodiment of this application.

[0022] Figure 7 This is a partial structural cross-sectional view of the internal structure of a high-reliability hub motor provided in an embodiment of this application.

[0023] Figure 8 This is a three-dimensional structural diagram of a track wheel provided in an embodiment of this application. Figure label: 1. Support module; 11. Top plate; 12. Inner cover; 13. Connecting box; 14. Stator; 15. First fixed shaft; 16. Second fixed shaft; 17. Circulation pipe; 131. Side wall; 132. Pin; 133. Column; 134. Buckle; 1331. First column; 1332. Second column; 1333. Mounting hole; 2. Motion module; 21. Planetary gear reducer; 22. Sprocket; 23. Shaft; 211. Track wheel; 212. Gear set; 213. Sun gear; 2111. Internal gear; 2112. Receiving cavity; 2113. Extrusion block; 2121. First driven gear; 2122. Second driven gear. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0026] Furthermore, where the terms "first," "second," "third," and "fourth" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of that feature. In the description of this application, where the terms "multiple" or "several" appear, "multiple" means at least two, such as two, three, etc., and "several" means one or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figure 1 , 2 As shown in Figure 7, an embodiment of this application provides a high-reliability hub motor with an integrated structure, comprising: a support module 1, a power source module, a motion module 2, and a hub housing (not shown). The power source module is mounted on the support module 1 and includes a stator 14 and a rotor. The motion module 2 includes a planetary gear reducer 21 and a rotating shaft 23. The planetary gear reducer 21 is mounted on the support module 1. The rotating shaft 23 is rotatably connected to the support module 1, the stator 14 is fixed to the support module 1, and the rotor is connected to the rotating shaft 23. The rotating shaft 23 is drive-connected to the planetary gear reducer 21. The power source module and the planetary gear reducer 21 are driven by the rotating shaft 23, that is, the torque generated by the power source module is transmitted to the planetary gear reducer 21 through the rotating shaft 23. After being reduced in speed by the planetary gear reducer 21, a larger torque is transmitted to the hub housing.

[0031] The support module 1, which covers the hub shell, houses the stator 14, rotor, planetary gear reducer 21, shaft 23, and part of the support module 1 within the hub shell. The support module 1 has two internal slots, with fixed shafts (15, 16) at both ends to support the electric bicycle frame. The stator 14 and rotor are located in one slot, cooperating to allow the rotor to rotate; the stator 14 is encircled on the outside. The planetary gear reducer 21 is located in the other slot. The shaft 23 is rotatably connected to the support module 1, transmitting power between the rotor and the planetary gear reducer 21. The shaft 23 also houses the sun gear 213 of both the rotor and the planetary gear reducer 21. The support module 1 includes a connecting box 13, which has a circumferential sidewall 131 forming a space within the sidewall 131. A partition is provided within the sidewall 131, dividing the space into the two aforementioned empty spaces. The first empty space is used to support the power source module, and the second empty space is used to support the planetary gear reducer 21. A rotating shaft 23 passes through the partition, allowing the rotating shaft 23 to rotate relative to the connecting box 13, such that both ends of the rotating shaft 23 extend into the two empty spaces respectively.

[0032] Specifically, the support module 1 covering the hub shell consists of the hub shell covering the support module 1, with two fixed shafts (15, 16) extending outward from the hub shell. The hub shell is connected to the output end of the planetary gear reducer 21. The rotor drives the rotating shaft 23 to rotate, and then the rotating shaft 23 is connected to the planetary gear reducer 21 for transmission. The rotating shaft 23 drives the hub shell to rotate via the planetary gear reducer 21.

[0033] Specifically, the fixed shafts (15, 16) include a first fixed shaft 15 and a second fixed shaft 16. The bracket module 1 also includes a top plate 11 and an inner cover 12. The inner cover 12 and the connecting box 13 are spaced apart, forming a first cavity for accommodating the stator 14 and the rotor. The rotating shaft 23 passes through the connecting box 13. The first fixed shaft 15 is located near the inner cover 12, and the second fixed shaft 16 is located near the connecting box 13. The top plate 11 is mounted on the inner cover 12, the first fixed shaft 15 is mounted inside the inner cover 12, and the first fixed shaft 15 passes through the top plate 11. The second fixed shaft 16 and the connecting box 13 form a second cavity for accommodating the planetary gear reducer 21.

[0034] In this design, the inner cover 12 and the connecting box 13 are connected by a connector, which passes through the first opening. The stator 14 cooperates with the connector to restrict the movement of the stator 14. The top plate 11 has a recessed slot, and one end of the connector extends into the slot, connecting the top plate 11 to the connector. The outer wall of the stator 14 has an axially extending fixing groove, in which the connector is embedded. The connector not only connects the inner cover 12 and the connecting box 13 but also restricts the position of the stator 14.

[0035] The connecting box 13 serves as the load-bearing structure for both the stator 14 and the planetary gear reducer 21; that is, the stator 14 and the planetary gear reducer 21 are mounted on the connecting box 13. By sharing the same components between the parts constituting the motor housing and the parts constituting the reducer housing, the distance between the two spaces is reduced, making the internal structure of the hub motor more compact and reducing its length, thus allowing it to accommodate hubs of wider widths. The internal structure of this hub motor is a combination of a fixed module 4 and a rotating module 5. Therefore, the length of the internal structure is limited by the length and layout of the fixed module 4 and the rotating module 5 themselves. The minimum length of the hub housing depends on the length of the internal structure of the hub motor. When the length of the internal structure of the hub motor is shorter, it can accommodate hub housings of more different lengths, making the integrated hub motor more adaptable.

[0036] Furthermore, combined Figure 3-5As shown in Figure 8, a flexible circulation tube 17 is also installed in the second empty space. The flexible circulation tube 17 deforms after being squeezed, and the cross-sectional area of ​​the squeezed part of the circulation tube 17 decreases. After the squeezing force is removed, the circulation tube 17 elastically recovers, and the cross-sectional area of ​​the circulation tube 17 returns to its original area. In addition, the planetary gear reducer 21 includes a sun gear 213, a gear set 212, and a track wheel 211 as the output end. The track wheel 211 is provided with internal circular teeth 2111. The sun gear 213, the gear set 212, and the internal circular teeth 2111 mesh with each other in sequence to transmit power, thereby enabling the rotating shaft 23 to drive the hub housing to rotate. Specifically, the center of the track wheel 211 is provided with a circular accommodating cavity 2112, which is also filled with lubricant. The internal circular teeth 2111 are provided on the cavity wall of the accommodating cavity 2112. The gear set 212 is located in the accommodating cavity 2112, and the gear set 212 meshes with the internal circular teeth 2111. Meanwhile, the track wheel 211 is connected to the hub shell, causing the hub shell to rotate.

[0037] A portion of the circulation tube 17 is located within the gap between the outer surface of the track wheel 211 and the inner wall of the connecting box 13, with both ends of the circulation tube 17 extending into the planetary gear reducer 21. Both ends of the circulation tube 17 also extend into the receiving cavity 2112. A pressing block 2113 is provided on the outer surface of the track wheel 211. The gap has a spacing difference, causing the pressing block 2113 to intermittently press the circulation tube 17 as it moves within the gap. In this design, the spacing difference in the gap can be understood as the gap width being inconsistent. The pressing block 2113 and the circulation tube 17 are located within the gap. At the narrower gap, the pressing block 2113 presses the circulation tube 17; correspondingly, at the wider gap, the pressing block 2113 separates from the circulation tube 17. After the extrusion block 2113 squeezes out part of the lubricant in the circulation pipe 17, the circulation pipe 17 returns to its shape. Due to the increased space and pressure, it is in a negative pressure state, so that one end of the circulation pipe 17 draws in the lubricant in the planetary gear reducer 21, and the other end of the circulation pipe 17 replenishes the lubricant in the planetary gear reducer 21.

[0038] The rotation of the track wheel 211 causes the extrusion block 2113 to continuously extrude the circulation pipe 17, ensuring the fluidity of the lubricant within the circulation pipe 17 and planetary gear reducer 21. When the hub motor is operating, it simultaneously drives the lubricant circulation, achieving lubricant flow without the need for an additional pump.

[0039] Although not shown in this scheme, it is understood that a portion of the circulation pipe 17 is located in the gap and contacts the extrusion block 2113. Since the circulation pipe 17 is installed on the non-moving support module 1, a portion of the circulation pipe 17 can also communicate with the processing module. The circulation pipe 17 extracts the lubricant in the planetary gear reducer 21 and transfers it to the processing module for purification before sending it back into the planetary gear reducer 21, thereby improving the cleanliness of the lubricant in the planetary gear reducer 21 and thus increasing the service life of the lubricant.

[0040] In this configuration, the number of teeth on the sun gear 213 is less than the number of teeth on the internal gear of the gear set 212, while the internal circular teeth 2111 are disposed on the inner wall of the accommodating cavity 2112 that houses the gear set 212. Therefore, the number of teeth on the internal circular teeth 2111 is greater than that on the gear set 212. The rotation of the track wheel 211 is achieved by the sun gear 213 driving the gear set 212 to rotate, and the gear set 212 driving the internal circular teeth 2111. This allows the track wheel 211 to be mounted on the second fixed shaft 16 and to rotate relative to the second fixed shaft 16.

[0041] Specifically, the connecting box 13 has a side wall 131 and a pin 132. The side wall 131 and the inner cover 12 form a first cavity for accommodating the stator 14 and the rotor. The pin 132 is used to mount a gear set 212. The pin 132 is located on the side of the connecting box 13 opposite to the side wall 131. It can be understood that the pin 132 is located on the outer side surface of the bottom plate of the side wall 131. A through shaft hole is opened at the center of the connecting box 13 for mounting a rotating shaft 23, so that the rotating shaft 23 can be simultaneously located in the first cavity and the second cavity. The pins 132 are circumferentially distributed on the outer side of the shaft hole. For example, there are three pins 132, and the three gear sets 212 mesh with the internal circular teeth 2111, so that the three gear sets 212 apply supporting force to the track wheel 211 from three directions, making the rotation of the track wheel 211 more stable.

[0042] Furthermore, the gear set 212 includes a first driven gear 2121 and a second driven gear 2122 arranged concentrically. The first driven gear 2121 meshes with the sun gear 213, and the second driven gear 2122 meshes with the internal teeth 2111. The first driven gear 2121 and the second driven gear 2122 have different numbers of teeth and different addendum circle diameters. For example, the first driven gear 2121 has more teeth than the second driven gear 2122, that is, the addendum circle diameter of the first driven gear 2121 is larger than that of the second driven gear 2122. Simultaneously, the first driven gear 2121 and the sun gear 213 are helical teeth, while the second driven gear 2122 and the internal teeth 2111 are spur teeth. The second driven gear 2122 extends into the receiving cavity 2112, while the first driven gear 2121 covers the receiving cavity 2112. On the other side of the connecting box 13 opposite to the side wall 131, there are circumferentially distributed columns 133, which extend into the receiving cavity 2112.

[0043] In this embodiment, the number of teeth on the sun gear 213 is less than the number of teeth on the first driven gear 2121, and the number of teeth on the second driven gear 2122 is less than the number of teeth on the inner gear 2111. The rotational speed of the gear set 212 is limited by the meshing transmission between the sun gear 213 and the first driven gear 2121, making the planetary gear reducer 21 a two-stage reducer. In practice, the rotational speed of the shaft 23 is the initial speed, the gear set 212 is at the first speed, and the inner gear 2111 is at the second speed. The initial speed is greater than the first speed, and the first speed is greater than the second speed. The number of teeth on the second driven gear 2122 is less than the number of teeth on the first driven gear 2121, making the difference in the number of teeth between the second driven gear 2122 and the inner gear 2111 greater than the difference in the number of teeth between the first driven gear 2121 and the inner gear 2111. This results in a smaller second rotational speed and a larger torque on the hub housing.

[0044] Corresponding to the structure of the planetary gear reducer 21, the first driven gear 2121 does not extend into the receiving cavity 2112, and part of the projection of the first driven gear 2121 is located outside the track wheel 211. In order to adapt to the contour shape of the first driven gear 2121 and the track wheel 211, the planetary gear reducer 21 is installed in the second cavity. The inner wall surface of the side wall 131 is provided with a recessed groove to accommodate the part of the first driven gear 212 projected outside the track wheel 211. The gap has a spacing difference, the distance from the inner wall surface of the side wall 131 without the recessed groove to the outer side surface of the track wheel 211 is the same, and the distance between the recessed groove and the outer side surface of the track wheel 211 is greater than the distance between the other inner wall surfaces of the side wall 131 and the outer side surface of the track wheel 211.

[0045] In this design, a clip 134 is installed in the recessed groove to fix the circulation tube 17 to the side wall 131. Simultaneously, the clip 134, positioned within the recessed groove, limits the distance between the circulation tube 17 and the outer surface of the track wheel 211. Circulation tubes 17 in other locations are compressed by the compression block 2113, which can be understood as the circulation tube 17 being clamped by the compression block 2113 and the side wall 131. However, the circulation tube 17 within the recessed groove is separated from the compression block 2113, making positioning difficult. The clip 134 is used to position the circulation tube 17 within the recessed groove.

[0046] The extrusion block 2113 has a sloping surface that contacts the circulation pipe 17, and the sloping surface gradually approaches the outer surface of the track wheel 211 along the rotation direction of the track wheel 211. By gradually increasing the degree of deformation of the circulation pipe 17 through the sloping surface, the lubricant in the circulation pipe 17 moves in one direction.

[0047] Furthermore, a carrier plate is provided at one end of the second fixed shaft 16. The carrier plate is located in the accommodating cavity 2112, and a second space is formed between the carrier plate and the connecting box 13. Multiple columns 133 are connected to the carrier plate, so that the height of the second space is fixed, so as to accommodate the gear set 212 and the sun gear 213. The column 133 is located between two adjacent gear sets 212. In this solution, the tip circles of the first driven gear 2121 in the two gear sets 212 are approximately tangent. For example, the cross-sectional shape of the column 133 is fan-shaped. The column 133 has an outer arc surface and two side surfaces. The two side surfaces are close to the adjacent gear sets 212, and the two side surfaces are arc surfaces adapted to the tip circles of the gear sets 212. In this design, the column 133 is stepped, comprising a first column 1331 located outside the receiving cavity 2112 and a second column 1332 located inside the receiving cavity 2112. The first column 1331 and the second column 1332 are stepped, and a portion of the projection of the first column 1331 is located outside the inner circular teeth 2111. The portion of the column 133 extending into the receiving cavity 2112 has a small area, while the portion located outside the receiving cavity 2112 has a larger area, allowing the portion of the column 133 outside the receiving cavity 2112 to also cover the receiving cavity 2112. Specifically, the projection of the cavity 2112 falls outside the root circle of the inner tooth 2111. The first driven gear 2121 and the column 133 can cover the inner tooth 2111 as much as possible to reduce the adhesion of external impurities to the inner tooth 2111, which would affect the meshing of the gear set 212 with the inner tooth 2111 and thus affect the smoothness of the transmission of the planetary gear reducer 21.

[0048] In some embodiments of this application, the track wheel 211 has a one-way rotation mechanism, and the hub shell is connected to the one-way rotation mechanism. When the hub shell rotates in the reverse direction, the track wheel 211 does not rotate in the reverse direction with the hub shell, so that the lubricant in the circulation pipe 17 can also flow in one direction. Specifically, the one-way rotation mechanism is a star wheel, and the track wheel 211 is provided with an outer yoke ring portion, which is located outside the receiving cavity 2112 and is arranged concentrically with the receiving cavity 2112. The star wheel is embedded in the outer yoke ring portion. The star wheel is a disc with notches distributed circumferentially, and rollers are provided in the notches of the disc. Springs are used to cooperate between the rollers and the disc, and the rollers can move within the notches. In this solution, when the track wheel 211 rotates actively in the forward direction, the star wheel and the outer yoke ring portion are in a wedge-fitting state, and the track wheel 211 drives the star wheel to rotate. When the track wheel 211 rotates in the reverse direction or the star wheel rotates in the forward direction, the star wheel and the outer yoke ring are disengaged, and the track wheel 211 is disconnected from the star wheel. When the star wheel and the outer yoke ring are in a wedge-engaged state, specifically, the rollers are pressed against the star wheel and the outer yoke ring under the force of the spring, and the track wheel 211 moves together with the star wheel due to the friction between the rollers and the star wheel and the outer yoke ring. When the star wheel and the outer yoke ring are disengaged, specifically, there is no friction between the rollers and the star wheel and the outer yoke ring, and the track wheel 211 does not move with the star wheel. Integrating the inner gear 2111 and the one-way rotation mechanism into the same track wheel 211 reduces the number of components, thereby reducing the length of the internal structure.

[0049] It is understood that the one-way rotation mechanism includes, but is not limited to, a star wheel. The one-way rotation mechanism can also be a ratchet and a ratchet tooth. Through the cooperation of the ratchet and ratchet tooth, one-way transmission between the track wheel 211 and the hub shell is achieved. Specifically, the ratchet tooth is connected to the outer yoke ring, and a spring is provided between the ratchet tooth and the outer yoke ring. The ratchet tooth is embedded in the outer yoke ring. When the track wheel 211 actively rotates in the forward direction, the ratchet tooth is located on the rotation path of the ratchet tooth. The ratchet tooth contacts the ratchet tooth, causing the ratchet tooth to rotate, which in turn causes the hub shell to rotate in the forward direction. When the track wheel 211 actively rotates in the reverse direction, the ratchet tooth moves along the tooth groove on the ratchet tooth, causing the ratchet tooth to separate from the tooth groove, and the track wheel 211 cannot drive the hub shell to rotate in the reverse direction. Forward rotation can be clockwise or counterclockwise, and vice versa.

[0050] Furthermore, the hub shell includes a hub body and a shell cover, which are connected internally to form a sealed space. The support module 1 and the motion module 2 are located within this sealed space. A tire is mounted on the hub body, and the shell cover is connected to the track wheel 211. In this design, the shell cover is connected to a one-way rotation mechanism. The shell cover and the hub body are fixedly connected by a threaded connection.

[0051] In some embodiments of this application, through holes are provided on the first fixed shaft 15 and the second fixed shaft 16 for power supply wires to pass through. In this solution, the through holes are angled holes, through which the wires required inside the hub motor pass to achieve the connection between the inside and outside of the hub motor.

[0052] At the same time, refer to Figure 6 As shown, the column 133 also has an oblique hole. Specifically, the column 133 has a mounting hole 1333 for the circulation pipe 17 to pass through. One end of the mounting hole 1333 is located on the outer surface of the first column 1331, and the other end is located on the inner surface of the second column 1332. More specifically, the outer surface is the outer arc surface of the column 133, and the inner surface is one or two of the inner surfaces of the column 133. After the circulation pipe 17 extends into the receiving cavity 2112 through the mounting hole 1333, since the other end of the mounting hole 1333 is located on the inner surface of the second column 1332, the port of the circulation pipe 17 is close to the bottom of the receiving cavity 2112, and the circulation pipe 17 can effectively extract the lubricating fluid from the planetary gear reducer 21.

[0053] It is understandable that the through holes on the first fixed shaft 15 or the second fixed shaft 16 can also pass through the circulation pipe 17, so that the circulation pipe 17 can be connected to the purification device located outside the hub motor. Since the space inside the hub motor is relatively compact, if the purification device is integrated into the hub motor, the size of the hub motor will increase, which will affect the compatibility of the hub motor.

[0054] Furthermore, a sprocket 22 is fitted onto the second fixed shaft 16. The sprocket 22 rotates relative to the second fixed shaft 16, causing it to rotate together with the track wheel 211. The sprocket 22 is used to connect with the chain. In this design, a retaining base is installed on the second fixed shaft 16, and the retaining base is connected to the sprocket 22. The retaining base has several retaining blocks, and the shaft hole of the sprocket 22 engages with the retaining blocks on the retaining base. The retaining base is rotatably fitted onto the second fixed shaft 16. A clamping block is also installed on the second fixed shaft 16, and the clamping block is threaded onto the thread of the second fixed shaft 16. The clamping block contacts the retaining base, causing the retaining base to press against the hub shell. Through the friction between the retaining base and the hub shell, the sprocket 22 is driven to rotate together with the hub shell and the track wheel 211.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-reliability hub motor with an integrated structure, characterized in that, include: The support module (1) includes a connecting box (13) on which a flexible circulation tube (17) is connected. A power source module, which is installed on the connection box (13); The motion module (2) includes a planetary gear reducer (21), which is rotatably connected to the connecting box (13). The power source module cooperates with the planetary gear reducer (21). The planetary gear reducer (21) has an output end track wheel (211). The circulation pipe (17) is located in the gap between the outer side of the track wheel (211) and the inner wall of the connecting box (13). The two ends of the circulation pipe (17) extend into the planetary gear reducer (21). The outer side of the track wheel (211) is provided with a pressing block (2113). The gap has a spacing difference. The pressing block (2113) intermittently presses the circulation pipe (17).

2. The hub motor according to claim 1, characterized in that, The connecting box (13) has a circumferential side wall (131), and the planetary gear reducer (21) is located in the space formed by the side wall (131). The inner wall surface of the side wall (131) is provided with a recessed groove.

3. The hub motor according to claim 2, characterized in that, The recessed groove has a buckle (134) for securing the circulation tube (17).

4. The hub motor according to claim 3, characterized in that, The extrusion block (2113) has a slope that contacts the circulation pipe (17), and the slope gradually approaches the outer surface of the track wheel (211) along the rotation direction of the track wheel (211).

5. The hub motor according to claim 2, characterized in that, The planetary gear reducer (21) includes a track wheel (211), at least two gear sets (212) and a sun gear (213), wherein the track wheel (211), the gear sets (212) and the sun gear (213) mesh in sequence; The connecting box (13) has a column (133) that is displaced between the two gear sets (212).

6. The hub motor according to claim 5, characterized in that, The track wheel (211) has a receiving cavity (2112), and the cavity wall of the receiving cavity (2112) is provided with internal round teeth (2111) that cooperate with the gear set (212). The column (133) extends into the receiving cavity (2112).

7. The hub motor according to claim 6, characterized in that, The column (133) includes a first column (1331) located outside the accommodating cavity (2112) and a second column (1332) located inside the accommodating cavity (2112). The first column (1331) and the second column (1332) are stepped apart. A portion of the projection of the first column (1331) is located outside the inner circular tooth (2111).

8. The hub motor according to claim 7, characterized in that, The column (133) has an installation hole (1333) for the circulation pipe (17) to pass through. One end of the installation hole (1333) is located on the outer side of the first column (1331), and the other end of the installation hole (1333) is located on the inner side of the second column (1332).

9. The hub motor according to claim 5, characterized in that, A partition is provided inside the side wall (131) to divide the space formed by the side wall (131) into two empty spaces. One of the empty spaces accommodates the planetary gear reducer (21), and the other empty space is used to accommodate the power source module. The rotor of the power source module is connected to the sun gear (213) through the partition via a rotating shaft (23).

10. The hub motor according to claim 1, characterized in that, The motion module (2) also includes a sprocket (22), which cooperates with the track wheel (211) and the sprocket (22) rotates with the track wheel (211).

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