High-speed hub-free electric wheel

Abstract

The utility model discloses a high-speed hub-free electric wheel which comprises a rotor assembly, and the rotor assembly comprises a first rotor and a second rotor which are in threaded connection. A stator assembly is arranged on the inner sides of the first rotor and the second rotor; a rotary connecting assembly, a sealing assembly and a limiting assembly are arranged between the rotor assembly and the stator assembly; and a tire is fixedly arranged on the outer side of the circumferential direction of the rotor assembly. The utility model discloses a high-speed hub-free electric wheel. The whole electric wheel is compact in design size, high in power density, convenient to install and free of a speed reducing mechanism. The bearing mechanism is arranged to be multi-stage, so that the use requirements of different powers can be met; the split rotor structure enables the installation to be more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheels, in particular to a high-speed hubless electric wheel. Background Art

[0002] Electric vehicles generally use a separate motor to drive the wheels, but the existing motors have the problems of large size, low power density, low torque, and the need for a reduction mechanism. In addition, high-power motorcycle motors require transmission, which leads to the problems of electric vehicle wheels and their drive mechanisms occupying a large space and low operating efficiency. Therefore, the present application proposes a high-speed hubless electric wheel to solve the above-mentioned problems of the electric wheel and its drive mechanism occupying a large space and low operating efficiency. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a high-speed hubless electric wheel.

[0004] The utility model provides a high-speed hubless electric wheel, comprising a rotor assembly, wherein the rotor assembly comprises a first rotor and a second rotor which are threadedly connected; a stator assembly is arranged on the inner sides of the first rotor and the second rotor; a rotating connection assembly, a sealing assembly and a limiting assembly are arranged between the rotor assembly and the stator assembly; a tire is fixedly arranged on the circumferential outer side of the rotor assembly.

[0005] Preferably, the rotating connection assembly includes a primary bearing assembly, and the primary bearing assembly is arranged between the circumferential outer side of the stator assembly and the inner side of the second rotor.

[0006] Preferably, the rotating connection assembly further includes a secondary bearing assembly, and the secondary bearing assembly is arranged between the circumferential side surfaces of the inner rings of the first rotor and the second rotor and the stator assembly.

[0007] Preferably, mounting grooves are evenly arranged on the inner end faces of the first rotor and the second rotor along the circumferential direction, and fan-shaped magnets are fixedly embedded in the interior of the mounting grooves by fixing glue; the number of the magnets is set between 23 and 95 according to the diameter of the electric wheel.

[0008] Preferably, the stator assembly includes a base, a coil assembly and a baffle; wherein,

[0009] The base has coil grooves extending uniformly along its circumference on its side end surface for mounting the coil assembly;

[0010] The coil assembly is fixed inside the corresponding coil slot by fixing glue; the coil assembly includes an H-shaped iron core, and a coil is wound around the outer side of the iron core;

[0011] The baffles are provided with two, and the two baffles are respectively fixedly arranged on the two side end surfaces of the stator; through holes are opened on the plate surfaces of the baffles corresponding to the two ends of the iron core.

[0012] Preferably, the primary bearing assembly includes a first bearing fixedly sleeved on the circumferential outer side of the base and located between the circumferential inner sides of the second rotor, and both sides of the first bearing are limited and fixed by a pressure ring.

[0013] Preferably, the secondary bearing assembly includes two annular stator covers symmetrically arranged on the inner ring circumferential surfaces of the stator assembly and the rotor assembly, and the longitudinal cross-section of the stator cover is L-shaped; the two stator covers are fixedly connected by a fixing block; a second bearing is fixedly arranged on the inner side of the stator cover between the side surface of the stator assembly and the inner ring circumferential surface of the rotor assembly; a first sealing ring is embedded on the circumferential surface of the stator cover close to the rotor assembly.

[0014] Preferably, the sealing assembly comprises an annular mounting groove arranged on the circumferential side surface of the first rotor and the second rotor close to the stator assembly, and a second sealing ring is fixedly arranged inside the mounting groove.

[0015] Preferably, the limiting assembly includes an annular slide groove arranged on the circumferential side surfaces of the two baffles away from the machine base, and an annular limiting boss is fixedly arranged on the circumferential side surfaces of the first rotor and the second rotor close to the stator assembly corresponding to the slide groove, and the limiting boss is snapped into the internal arrangement of the corresponding slide groove.

[0016] Preferably, a positioning block is provided on the circumferential side surface between the first rotor and the second rotor via a bolt assembly, so as to fix the first rotor and the second rotor.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The high-speed hubless electric wheel of the utility model is formed by integrating the wheel and the motor into an integrated design to form an integrated electric wheel, which has a compact size, reduces the space occupancy, has a high power density, high operating efficiency, is easy to install, and does not require a deceleration mechanism. In addition, the electric wheel can be set to a variety of models and specifications according to demand. When the power is small, only the first-level bearing assembly can be used; when the power is large, both the first-level bearing assembly and the second-level bearing assembly are used at the same time.

[0019] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model.

[0020] Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 A schematic diagram of the structure of a high-speed hubless electric wheel provided by an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the cutaway of the electric wheel;

[0024] Figure 3 It is an enlarged structural schematic diagram of the electric wheel after being cut;

[0025] Figure 4 is a structural schematic diagram of a stator assembly;

[0026] Figure 5 This is an exploded view of the stator assembly;

[0027] Figure 6 is a schematic structural diagram of the second rotor;

[0028] Figure 7 is a schematic structural diagram of the first rotor;

[0029] Numbers in the figure: 1, rotor assembly; 11, first rotor; 12, second rotor; 13, positioning block; 14, clamping table; 15, mounting slot;

[0030] 2. stator assembly; 21. base; 22. coil slot; 23. iron core; 24. coil; 25. baffle; 26. through hole;

[0031] 3. Rotating connection assembly; 31. Primary bearing assembly; 311. First bearing; 312. Pressing ring; 32. Secondary bearing assembly; 321. Stator cover; 322. Fixing block; 323. Second bearing; 324. First sealing ring;

[0032] 4. Sealing assembly; 41. Mounting groove; 42. Second sealing ring;

[0033] 5. Limiting assembly; 51. Slide groove; 52. Limiting boss. DETAILED DESCRIPTION

[0034] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Please refer to Figures 1 to 7 The embodiment of the utility model provides a high-speed hubless electric wheel, including a rotor assembly 1, wherein the rotor assembly 1 includes a first rotor 11 and a second rotor 12 which are threadedly connected. Specifically, the first rotor 11 is threadedly connected to one end of the inner side of the second rotor 12; wherein a positioning block 13 is also provided on the circumferential side surface where the first rotor 11 and the second rotor 12 are connected to each other through a bolt assembly, for positioning the relative position between the first rotor 11 and the second rotor 12. The first rotor 11 and the second rotor 12 can also be fixed by a fixed slot plus a limit block or circumferentially or radially evenly distributed bolts and positioning blocks or pins.

[0037] The longitudinal cross-section of the second rotor 12 is L-shaped, and a multi-stepped clamping platform 14 is provided on the circumferential side of the inner ring of the second rotor 12 to facilitate the installation of the stator assembly 1 and the rotating connection assembly 3.

[0038] A stator assembly 2 is arranged on the inner side of the first rotor 11 and the second rotor 12; a rotating connection assembly 3, a sealing assembly 4 and a limiting assembly 5 are arranged between the rotor assembly 1 and the stator assembly 2; wherein the rotating connection assembly 3 is used to realize the rotatable function of the rotor assembly 1 relative to the stator assembly 2; the sealing assembly 4 is used to realize the sealing between the rotor assembly 1 and the stator assembly 2; the limiting assembly 5 is used to realize the installation limit of the relative position between the rotor assembly 1 and the stator assembly 2.

[0039] A tire is fixedly arranged on the circumferential outer side of the rotor assembly 1 , wherein the tire is a solid tire and is fixedly installed inside an annular groove (not shown in the figure) on the outer circumferential surface of the second rotor 12 .

[0040] In a preferred embodiment, the rotary connection assembly 3 includes a primary bearing assembly 31 , which is disposed between the circumferential outer side of the stator assembly 2 and the inner side of the second rotor 12 .

[0041] In a preferred embodiment, the rotating connection assembly 3 further includes a secondary bearing assembly 32 , which is disposed between the inner circumferential side surfaces of the first rotor 11 and the second rotor 12 and the stator assembly 2 .

[0042] In actual production, bearings are used in combination according to the power sizes of different models in different series; that is, some electric wheel models are only provided with a primary bearing assembly 31, and some electric wheel models are provided with both a primary bearing assembly 31 and a secondary bearing assembly 32; when the power is relatively small, only the primary bearing assembly 31 can be used; when the power is high, both the primary bearing assembly 31 and the secondary bearing assembly 32 are used.

[0043] In a preferred embodiment, mounting grooves 15 are evenly arranged along the circumferential direction on the inner end surfaces of the first rotor 11 and the second rotor 12, and fan-shaped magnets are fixedly embedded in the mounting grooves 15 by fixing glue; the number of magnets is set between 23 and 95 according to the diameter of the electric wheel.

[0044] Among them, the magnet is required to have consistent height after installation, and the gaps around it are filled with fixing glue. After the fixing glue hardens, the protruding glue is processed to be flat to ensure that the entire end face is a plane after processing.

[0045] In a preferred embodiment, the stator assembly 2 includes a base 21, a coil assembly and a baffle 25; wherein,

[0046] The side surface of the base 21 is evenly provided with coil slots 22 along its circumference for installing the coil assembly; wherein, the inner hole of the base 21 has a fixing point for connecting the frame to fix the wheel.

[0047] The coil assembly is fixed in the corresponding coil slot 22 by fixing glue; the coil assembly includes an H-shaped iron core 23, and a coil 24 is wound around the outer side of the iron core 23; wherein, an anchor point is provided inside the coil slot 22 to make the glue and the coil assembly more firmly fixed.

[0048] Two baffles 25 are provided, and the two baffles 25 are respectively fixedly arranged on the two side end surfaces of the base 21; through holes 26 are opened on the plate surface of the baffle 25 corresponding to the two ends of the iron core 23; the baffle 25 is welded to the base 21 after the coil assembly is installed, or anchor points are made on the baffle 25 to glue the baffle 25 and the base 21 together, and then the overflowed glue is processed and removed to prevent the coil assembly from being deformed due to incomplete filling or high temperature; after the fixing glue is filled and dried, the two end surfaces of the stator assembly 2 are processed to be smooth, and after processing, the two end surfaces are guaranteed to be smooth and without bumps.

[0049] The fixing glue used in this solution is a glue with insulating and thermally conductive properties.

[0050] In a preferred embodiment, the primary bearing assembly 31 includes a first bearing 311 fixedly sleeved on the circumferential outer side of the base 21 and located between the circumferential inner sides of the second rotor 12, and both sides of the first bearing 311 are limited and fixed by a pressing ring 312; wherein, a plurality of first bearings 311 are provided, and the plurality of first bearings 311 and the first bearing 311 and the second rotor 12 are fixed and limited by the pressing ring 312;

[0051] In a preferred embodiment, the secondary bearing assembly 32 includes two annular stator covers 321 symmetrically arranged on the inner ring circumferential surfaces of the stator assembly 2 and the rotor assembly 1, and the longitudinal cross-section of the stator cover 321 is L-shaped; the joint between the two stator covers 321 is fixedly connected by a fixing block 322 with screws; the inner side of the stator cover 321 is fixedly provided with a second bearing 323 between the side surface of the stator assembly 2 and the inner ring circumferential surface of the rotor assembly 1; a first sealing ring 324 is embedded on the circumferential surface of the stator cover 321 close to the rotor assembly 1 to ensure the sealing effect of the second bearing 323.

[0052] In a preferred embodiment, the sealing assembly 4 includes an annular mounting groove 41 arranged on the circumferential side of the first rotor 11 and the second rotor 12 close to the stator assembly 2, and a second sealing ring 42 is fixedly arranged inside the mounting groove 41 to ensure the sealing of the rotor assembly 1 and the stator assembly 2 after installation.

[0053] In a preferred embodiment, the limiting assembly 5 includes an annular groove 51 arranged on the circumferential side of the two baffles 25 away from the stator, and an annular limiting boss 52 is fixedly arranged on the circumferential side of the first rotor 11 and the second rotor 12 close to the stator assembly 2 corresponding to the groove 51. The limiting boss 52 is snapped into the internal setting of the corresponding groove 51, which facilitates the limited installation of the stator assembly 2 and the rotor assembly 1 during installation, making the assembled structure more stable.

[0054] The electric wheel of the present application mainly includes a coil assembly, a stator assembly 2 and a rotor assembly 3. The coil assembly is arranged in the stator assembly 2 and corresponds to the magnet in the rotor assembly 1. After the coil assembly is energized, the rotor assembly 1 rotates through the magnetic field to drive the tire to rotate; the entire electric wheel is designed to be compact in size, high in power density, easy to install, and does not require a deceleration mechanism; and the bearing mechanism is arranged in multiple stages to meet the use requirements of different power; the split rotor structure makes installation more convenient.

[0055] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-speed hubless electric wheel, characterized in that: It includes a rotor assembly, which includes a first rotor and a second rotor that are threadedly connected; a stator assembly is arranged on the inner sides of the first rotor and the second rotor; a rotating connection assembly, a sealing assembly and a limiting assembly are arranged between the rotor assembly and the stator assembly; a tire is fixedly arranged on the circumferential outer side of the rotor assembly.

2. The high-speed hubless electric wheel according to claim 1, characterized in that: The rotating connection assembly includes a primary bearing assembly, which is arranged between the circumferential outer side of the stator assembly and the inner side of the second rotor.

3. The high-speed hubless electric wheel according to claim 2, characterized in that: The rotating connection assembly further includes a secondary bearing assembly, and the secondary bearing assembly is disposed between the inner ring circumferential side surfaces of the first rotor and the second rotor and the stator assembly.

4. The high-speed hubless electric wheel according to claim 1, characterized in that: The inner end surfaces of the first rotor and the second rotor are uniformly provided with mounting grooves along the circumferential direction, and fan-shaped magnets are fixedly embedded in the interior of the mounting grooves by fixing glue; the number of the magnets is set between 21 and 96 according to the diameter of the electric wheel.

5. The high-speed hubless electric wheel according to claim 3, characterized in that: The stator assembly includes a base, a coil assembly and a baffle; wherein, The base has coil grooves extending uniformly along its circumference on its side end surface for mounting the coil assembly; The coil assembly is fixed inside the corresponding coil slot by fixing glue; the coil assembly includes an H-shaped iron core, and a coil is wound around the outer side of the iron core; The baffles are provided with two, and the two baffles are respectively fixedly arranged on the two side end surfaces of the stator; through holes are opened on the plate surfaces of the baffles corresponding to the two ends of the iron core.

6. The high-speed hubless electric wheel according to claim 5, characterized in that: The primary bearing assembly includes a first bearing fixedly sleeved on the circumferential outer side of the base and located between the circumferential inner sides of the second rotor, and both sides of the first bearing are limited and fixed by a pressure ring.

7. The high-speed hubless electric wheel according to claim 3, characterized in that: The secondary bearing assembly includes two annular stator covers symmetrically arranged on the inner ring circumferential surfaces of the stator assembly and the rotor assembly, and the longitudinal section of the stator cover is L-shaped; the two stator covers are fixedly connected by a fixing block; the inner side of the stator cover is fixedly provided with a second bearing between the side surface of the stator assembly and the inner ring circumferential surface of the rotor assembly; the stator cover is embedded with a first sealing ring on the circumferential surface close to the rotor assembly.

8. The high-speed hubless electric wheel according to claim 1, characterized in that: The sealing assembly comprises an annular mounting groove arranged on the circumferential side surfaces of the first rotor and the second rotor close to the stator assembly, and a second sealing ring is fixedly arranged inside the mounting groove.

9. The high-speed hubless electric wheel according to claim 5, characterized in that: The limiting assembly includes an annular slide groove arranged on the circumferential side surfaces of the two baffles away from the machine base, and an annular limiting boss is fixedly arranged on the circumferential side surfaces of the first rotor and the second rotor close to the stator assembly corresponding to the slide groove, and the limiting boss is snapped into the internal arrangement of the corresponding slide groove.

10. The high-speed hubless electric wheel according to claim 1, characterized in that: A positioning block is provided on the circumferential side surface of the first rotor and the second rotor which are connected to each other through a bolt assembly, so as to fix the first rotor and the second rotor.

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