Hub motor and vehicle using same

Abstract

The utility model relates to a hub motor and a vehicle using the same. The hub motor comprises a rim, a motor rotor, a motor end cover, a motor stator and a connecting assembly. The motor rotor comprises a plurality of rotor cores. The plurality of rotor iron cores are sequentially arranged on the rim along the circumferential direction of the rim; the motor end cover is connected with the rim; the motor stator and the rim are coaxially arranged, and the motor stator is rotationally connected with the motor end cover; the connecting assembly comprises a fixed end plate, a clamping end plate and a connecting piece, the fixed end plate and the clamping end plate are arranged on the two sides of the rotor iron core in the axial direction of the rim respectively, the fixed end plate is connected with the rim, and the connecting piece is connected with the clamping end plate and the fixed end plate so that the clamping end plate can abut against the rotor iron core on the fixed end plate. The installation speed of the rotor iron core of the hub motor is fast, so that the assembly efficiency of the hub motor is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a wheel hub motor and a vehicle applying the wheel hub motor. BACKGROUND

[0002] With the development of electric new energy vehicles, electric motorcycles are replacing fuel motorcycles, and electric all-terrain vehicles and electric passenger vehicles are also gradually replacing corresponding fuel versions, because electric vehicles have more environmental protection and lower use costs. At present, the driving structure of electric vehicles generally includes a driving structure of a motor cooperating with a transmission mechanism, a wheel hub motor structure of a motor integrated with a wheel, etc. Among them, the wheel hub motor is widely used in electric bicycles or electric motorcycles.

[0003] The wheel hub motor generally includes a rim of a wheel, a motor rotor and a motor stator. The motor stator is generally a coil structure, and the motor stator is coaxially rotatably installed on the rim. The motor rotor is generally a permanent magnet, and the electronic rotor is usually attached to the inner ring of the rim by a plastic encapsulation and curing process. When the motor stator is powered to generate a magnetic field, the motor rotor is forced to rotate relative to the motor stator to drive the rim to rotate, so as to drive the corresponding wheel to rotate and move the vehicle.

[0004] In the existing wheel hub motor assembly process, the motor stator and other structures can be installed only after the plastic encapsulation and curing of the motor rotor. However, due to the long curing time of the plastic encapsulation, the assembly efficiency of the wheel hub motor is low. Inventive content

[0005] Therefore, the present application provides a wheel hub motor and a vehicle applying the wheel hub motor, which has high assembly efficiency.

[0006] Embodiments of the present application provide a wheel hub motor, which includes a rim, a motor rotor, a motor end cover, a motor stator and a connecting assembly. The motor rotor includes a plurality of rotor cores, and the plurality of rotor cores are sequentially arranged on the rim along the circumferential direction of the rim. The motor end cover is connected with the rim. The motor stator is coaxially arranged with the rim and is rotatably connected with the motor end cover. The connecting assembly includes a fixed end plate, a clamping end plate and a connecting piece. The fixed end plate and the clamping end plate are respectively arranged on both sides of the rotor core along the axial direction of the rim. The fixed end plate is connected with the rim. The connecting piece connects the clamping end plate and the fixed end plate, so that the clamping end plate abuts against the rotor core on the fixed end plate.

[0007] In some embodiments of the present application, a plurality of connecting assemblies are sequentially arranged along the circumferential direction of the rim, one connecting assembly corresponds to at least one rotor core, and each connecting assembly fixes the corresponding rotor core.

[0008] In some embodiments of the present application, the motor rotor further comprises a permanent magnet, the rotor core is provided with an embedding slot, and the permanent magnet is arranged in the embedding slot. The clamping end plate and the fixing end plate are respectively in abutment with two sides of the rotor core.

[0009] In some embodiments of the present application, the embedding slot is arranged at an end wall of one end of the rotor core along the axial direction of the rim, and the clamping end plate and / or the fixing end plate block at least part of the opening of the embedding slot and are in abutment with the permanent magnet.

[0010] In some embodiments of the present application, one end of the rotor core along the circumferential direction of the rim is provided with a connecting protrusion, and the other end is provided with a connecting slot. The connecting protrusion is inserted into the connecting slot of the adjacent other rotor core.

[0011] In some embodiments of the present application, the connecting slot penetrates through at least one side wall of the rotor core along the axial direction of the rim.

[0012] In some embodiments of the present application, the end wall of any one of the clamping end plates at any one end along the circumferential direction of the rim is in abutment with the adjacent other clamping end plate.

[0013] In some embodiments of the present application, the fixing end plate is provided with a weight-reducing slot on the side away from the rotor core along the axial direction of the rim.

[0014] In some embodiments of the present application, the rotor core is provided with a connecting hole for inserting the connecting piece along the axial direction of the rim.

[0015] The embodiments of the present application also provide a vehicle, which comprises a vehicle frame, a vehicle body cover, a walking system and a power system. The vehicle body cover is at least partially arranged on the vehicle frame. The walking system at least comprises a driving wheel. The power system comprises a power battery, and the power battery is at least partially supported by the vehicle frame. The driving wheel comprises the hub motor of any one of the above-mentioned embodiments. The motor stator of the hub motor is connected with the vehicle frame. The rim of the hub motor is at least partially arranged below the vehicle frame. The motor stator is electrically connected with the power battery.

[0016] The hub motor applied to the vehicle of the present application is assembled in a way that the motor rotor is in abutment with the fixing end plate, and then the clamping end plate is fixed by the connecting piece to make the clamping end plate abut against the motor rotor and the fixing end plate. In this way, the installation operation of the motor rotor is completed, the installation speed of the motor rotor is improved, and the assembly efficiency of the hub motor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a vehicle provided by an embodiment of the present application;

[0018] Figure 2 is a structural schematic view of a hub motor provided by an embodiment of the present application;

[0019] Figure 3 isFigure 2 A partial exploded view of the hub motor after removal of the motor stator is provided.

[0020] Figure 4 is Figure 3 A schematic view of the hub motor from another perspective is provided.

[0021] Figure 5 is Figure 4 An enlarged view at A.

[0022] Figure 6 An exploded structural schematic view of the hub motor according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] Some embodiments of the present application will be described below in detail with reference to the accompanying drawings. The following embodiments and features of the embodiments can be combined with each other without conflict.

[0027] With reference to Figure 1 , an embodiment of the present application provides a vehicle 100 comprising a frame 11, a body cover 12, a running system 13 and a power system (not shown in the figure). In some embodiments, the vehicle 100 is a two-wheeled electric motorcycle. In other embodiments, the vehicle 100 can be an electric bicycle. In other embodiments, the vehicle 100 can also be a three-wheeled motorcycle or an all-terrain vehicle or other types of electric or hybrid vehicles.

[0028] The body cover 12 at least partially covers the frame 11 to form a body structure of the vehicle 100.

[0029] The power system comprises a power battery, which is covered by the body cover 12 and at least partially supported by the frame 11.

[0030] As an implementation manner, the walking system 13 comprises a driving wheel 131 and a supporting wheel 132. The supporting wheel 132 is arranged at the front end of the vehicle frame 11, and the driving wheel 131 is arranged at the rear end of the vehicle frame 11. The driving wheel 131 comprises a hub motor 1311 and a tire 1312. The tire 1312 is connected with the hub motor 1311, and the tire 1312 has a shock absorption effect. The hub motor 1311 is electrically connected with a power battery. The power battery supplies power to the hub motor 1311, so that the hub motor 1311 rotates, thereby moving the vehicle 100. In other embodiments, the driving wheel 131 can be arranged at the front end of the vehicle frame 11, and the supporting wheel 132 can be arranged at the rear end of the vehicle frame 11. In other embodiments, the supporting wheel 132 can be replaced by the driving wheel 131 to improve the overall power of the vehicle 100.

[0031] With reference to Figure 2 and Figure 3 , the hub motor 1311 comprises a rim 1311a, a motor rotor 1311b, motor end covers 1311c, a motor stator 1311d and a connecting assembly 1311e. The tire 1312 is arranged at the outer ring of the rim 1311a. The motor rotor 1311b comprises a plurality of rotor cores 1311k. The rotor cores 1311k are sequentially arranged at the inner ring of the rim 1311a along the circumferential direction of the rim 1311a and are fixed to the rim 1311a through the connecting assembly 1311e. The motor end covers 1311c are arranged at both sides of the rim 1311a along the axial direction of the rim 1311a and are fixedly connected with the rim 1311a through screws.

[0032] The motor stator 1311d is coaxially arranged with the rim 1311a and is rotationally connected with the motor end covers 1311c.

[0033] With reference to Figure 3 and Figure 4In some embodiments, the connecting assembly 1311e is sequentially provided with a plurality of connecting assemblies 1311e along the circumferential direction of the rim 1311a, one connecting assembly 1311e corresponding to at least one rotor core 1311k, and each connecting assembly 1311e fixing the corresponding rotor core 1311k. The connecting assembly 1311e comprises a fixed end plate 1311g, a clamping end plate 1311h, and a connecting piece 1311j. The fixed end plate 1311g and the clamping end plate 1311h are respectively arranged on both sides of the rotor core 1311k along the axial direction of the rim 1311a. The fixed end plate 1311g is connected to the rim 1311a. The connecting piece 1311j connects the clamping end plate 1311h and the fixed end plate 1311g, so that the clamping end plate 1311h abuts against the rotor core 1311k on the fixed end plate 1311g.

[0034] In some embodiments, the fixed end plates 1311g of all the connecting assemblies 1311e are sequentially connected end to end along the circumferential direction of the rim 1311a to form an integral annular structure, and the fixed end plates 1311g are integrally formed with the rim 1311a. The fixed end plate 1311g is provided with a weight-reducing groove 1311s arranged on the side of the fixed end plate 1311g away from the rotor core 1311k along the axial direction of the rim 1311a. In some embodiments, the fixed end plate 1311g is further provided with a weight-reducing notch 1311t arranged along the axial direction of the rim 1311a. The weight-reducing groove 1311s and the weight-reducing notch 1311t can reduce the weight of the fixed end plate 1311g, thereby reducing the weight of the rim 1311a, so as to facilitate the rotation of the rim 1311a.

[0035] Referring to Figures 4 to 6 In some embodiments, the rotor core 1311k further comprises a permanent magnet 1311m, and the rotor core 1311k is provided with an embedding groove 1311n. For example, a plurality of embedding grooves 1311n are spaced apart along the circumferential direction of the rim 1311a on each rotor core 1311k, and a plurality of permanent magnets 1311m are correspondingly provided, and each permanent magnet 1311m is arranged in the corresponding embedding groove 1311n. In some embodiments, the connecting piece 1311j is a screw, the clamping end plate 1311h is provided with a fixing hole 1311p (see Figure 3 ), the rotor core 1311k is provided with a connecting hole 1311q, and the fixed end plate 1311g is provided with a connecting screw hole 1311r (see Figure 3), the connecting piece 1311j is sequentially inserted into the fixing hole 1311p and the connecting hole 1311q and is threadedly matched with the connecting screw hole 1311r, so that the clamping end plate 1311h and the fixing end plate 1311g are respectively abutted with two sides of the rotor core 1311k, so as to make the clamping end plate 1311h and the fixing end plate 1311g cooperate with each other and clamp the rotor core 1311k, thereby realizing the quick installation operation of the rotor core 1311k. Exemplarily, the cross section of the rotor core 1311k perpendicular to the axial direction of the rim 1311a is substantially fan-shaped, and the side wall of the rotor core 1311k on the side away from the central axis of the rim 1311a is attached to the inner peripheral wall of the rim 1311a.

[0036] The embedding groove 1311n has a positioning effect on the permanent magnet 1311m, which can improve the accuracy of the position of the permanent magnet 1311m relative to the rim 1311a and can improve the stability of the fixation of the permanent magnet 1311m relative to the rim 1311a. In other embodiments, the rotor core 1311k can be omitted, and the clamping end plate 1311h cooperates with the fixing end plate 1311g and clamps the permanent magnet 1311m. In other embodiments, the connecting piece 1311j can be a rivet, and the connecting piece 1311j is riveted with the fixing end plate 1311g, so that the clamping end plate 1311h is abutted with the rotor core 1311k on the fixing end plate 1311g. In other embodiments, the connecting piece 1311j and the fixing end plate 1311g can also be a snap connection structure, as long as the clamping end plate 1311h can clamp the rotor core 1311k.

[0037] Compared with the conventional process of fixing and mounting the rotor core 1311k or the permanent magnet 1311m by curing the plastic sealing glue, the permanent magnet 1311m can be pre-installed in the embedding groove 1311n, and then the rotor core 1311k is fixed by the connecting assembly 1311e, which saves the waiting time for curing the plastic sealing glue, thereby speeding up the installation speed of the rotor core 1311k, thereby improving the assembly efficiency of the hub motor 1311.

[0038] In some embodiments, the embedding slot 1311n is arranged at an end wall of the rotor core 1311k at one end of the wheel rim 1311a in the axial direction of the wheel rim 1311a, and the clamping end plate 1311h and / or the fixing end plate 1311g blocks at least part of the opening of the embedding slot 1311n and abuts against the permanent magnet 1311m. For example, the embedding slot 1311n penetrates through the side wall of the corresponding side of the rotor core 1311k at both ends in the axial direction of the wheel rim 1311a, and the clamping end plate 1311h and the fixing end plate 1311g respectively block at least part of the opening of the corresponding side of the embedding slot 1311n and abut against the corresponding end of the permanent magnet 1311m to fix the permanent magnet 1311m. In other embodiments, only one end of the embedding slot 1311n is arranged penetratingly in the axial direction of the wheel rim 1311a, and the corresponding clamping end plate 1311h or fixing end plate 1311g blocks at least part of the opening of the embedding slot 1311n and abuts against the permanent magnet 1311m.

[0039] In some embodiments, any two adjacent embedding slots 1311n are oppositely inclined and substantially V-shaped when viewed in the axial direction of the wheel rim 1311a. In other embodiments, each embedding slot 1311n can also be arranged in the tangential direction at the corresponding position of the wheel rim 1311a when viewed in the axial direction of the wheel rim 1311a.

[0040] In other embodiments, the embedding slot 1311n can be arranged at the side wall of the rotor core 1311k at one side of the wheel rim 1311a in the radial direction. For example, the permanent magnet 1311m can be fixedly installed in the embedding slot 1311n by potting glue. It can be understood that the stable connection between the permanent magnet 1311m and the rotor core 1311k can be completed in advance before being moved to the assembly station of the hub motor 1311 in batches, so as to not affect the assembly efficiency of the hub motor 1311.

[0041] In some embodiments, the end wall of any rotor core 1311k at any end in the circumferential direction of the wheel rim 1311a abuts against the adjacent other rotor core 1311k. The rotor core 1311k is provided with a connecting protrusion 1311u at one end in the circumferential direction of the wheel rim 1311a and a connecting slot 1311v at the other end, and the connecting protrusion 1311u is inserted into the connecting slot 1311v of the adjacent other rotor core 1311k. The connecting protrusion 1311u and the connecting slot 1311v cooperate to support the adjacent two rotor cores 1311k relative to each other, so as to improve the stability of the rotor core 1311k fixed relative to the wheel rim 1311a.

[0042] In some embodiments, the connecting groove 1311v penetrates through the side wall of at least one side of the rotor core 1311k along the axial direction of the rim 1311a. When installing the rotor core 1311k, the rotor core 1311k can be moved along the axial direction of the rim 1311a so that the connecting protrusion 1311u is inserted into the connecting groove 1311v, and the operation is more convenient.

[0043] In some embodiments, the end wall of any clamping end plate 1311h at any end along the circumferential direction of the rim 1311a abuts against the end wall of another adjacent clamping end plate 1311h. When performing the assembly operation, one rotor core 1311k can be fixedly installed on the rim 1311a through a set of connecting assemblies 1311e. When installing the next rotor core 1311k, the connecting protrusion 1311u of the rotor core 1311k to be installed is inserted into the connecting groove 1311v of the rotor core 1311k that has been installed, and the end wall of the clamping end plate 1311h at one end abuts against the end wall of the clamping end plate 1311h at one end that has been installed, so that the corresponding fixing hole 1311p, connecting hole 1311q, and connecting screw hole 1311r are aligned with each other. Finally, the connecting piece 1311j is installed to fix the corresponding rotor core 1311k, and the operation is convenient.

[0044] In some embodiments, the clamping end plate 1311h is provided with a clearance notch 1311w, which is arranged at the end of the clamping end plate 1311h along the circumferential direction of the rim 1311a and penetrates through the end wall of the corresponding end of the clamping end plate 1311h. On the one hand, the clearance notch 1311w can reduce the weight of the clamping end plate 1311h, and on the other hand, the clearance notch 1311w can reduce the machining area of the end wall of the corresponding end of the clamping end plate 1311h, so as to facilitate the machining of the end wall of the clamping end plate 1311h to make the end walls of the two adjacent clamping end plates abut against and fit with each other.

[0045] In addition, those skilled in the art should understand that the above embodiments are only used to illustrate the present application, and are not used as a limitation to the present application. Any appropriate changes and modifications made to the above embodiments within the spirit and principle of the present application fall within the disclosure range of the present application.

Claims

1. A wheel hub motor, comprising: a wheel rim; a motor rotor, comprising a plurality of rotor cores, the plurality of rotor cores being sequentially arranged along a circumferential direction of the wheel rim; a motor end cover, connected with the wheel rim; a motor stator, coaxially arranged with the wheel rim and rotationally connected with the motor end cover; characterized in that the wheel hub motor further comprises a connecting assembly, the connecting assembly comprising a fixed end plate, a clamping end plate and a connecting piece, the fixed end plate and the clamping end plate being respectively arranged on two sides of the rotor core along an axial direction of the wheel rim, the fixed end plate being connected with the wheel rim, and the connecting piece connecting the clamping end plate and the fixed end plate so that the clamping end plate abuts the rotor core against the fixed end plate.

2. The wheel hub motor according to claim 1, characterized in that A plurality of the connecting assemblies are sequentially arranged along the circumferential direction of the wheel rim, one of the connecting assemblies corresponding to at least one of the rotor cores, and each of the connecting assemblies fixing the corresponding rotor core.

3. The wheel hub motor according to claim 1, characterized in that, The motor rotor further comprises a permanent magnet, the rotor core is provided with an embedding slot, the permanent magnet is arranged in the embedding slot, and the clamping end plate and the fixed end plate respectively abut two sides of the rotor core.

4. The wheel hub motor according to claim 3, characterized in that The embedding slot is arranged on an end wall of one end of the rotor core along the axial direction of the wheel rim, and the clamping end plate and / or the fixed end plate blocks at least part of an opening of the embedding slot and abuts the permanent magnet.

5. The wheel motor according to claim 3, characterized by One end of the rotor core along the circumferential direction of the wheel rim is provided with a connecting protrusion, and the other end is provided with a connecting slot, the connecting protrusion being inserted into the connecting slot of an adjacent other rotor core.

6. The wheel hub motor according to claim 5, characterized in that The connecting slot penetrates through a side wall of at least one side of the rotor core along the axial direction of the wheel rim.

7. The in-wheel motor according to claim 1, characterized by An end wall of any one of the clamping end plates along any one end of the circumferential direction of the wheel rim abuts an adjacent other clamping end plate.

8. The in-wheel motor according to claim 1, characterized by The fixed end plate is provided with a lightening slot on a side thereof away from the rotor core along the axial direction of the wheel rim.

9. The in-wheel motor according to claim 1, characterized by The rotor core is provided with a connecting hole penetrating through along the axial direction of the wheel rim for the connecting piece to be inserted.

10. A vehicle, comprising: a vehicle frame; a vehicle body cover, at least partially covering the vehicle frame; a walking system, comprising at least a driving wheel; a power system, comprising a power battery, the power battery being at least partially supported by the vehicle frame; characterized in that the driving wheel comprises the wheel hub motor according to any one of claims 1 to 9, the motor stator of the wheel hub motor being connected with the vehicle frame, the wheel rim of the wheel hub motor being at least partially located below the vehicle frame, and the motor stator being electrically connected with the power battery.

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