Split type wheel hub motor and electric vehicle

Abstract

The utility model provides a split type wheel hub motor and electric motor car, include: wheel hub motor casing, the lateral wall of wheel hub motor casing is equipped with first connecting flange, the rim is equipped with second connecting flange with first connecting flange's first end contact on, connecting assembly includes flange plate, first connecting bolt and second connecting bolt, the flange plate sets up first connecting flange second end, first connecting bolt passes through flange plate and is connected with first connecting flane, and the flange plate is fixed on wheel hub motor casing, second connecting bolt passes through flange plate, first connecting flange and second connecting flange in proper order and is connected with nut, and the rim is fixed on wheel hub motor casing. The utility model split type wheel hub motor, compact structure, can realize the detachable connection of rim, has reduced production and maintenance cost, and the loading and unloading are convenient, have improved product market competitiveness, are applicable to a variety of car models, satisfy different user demand.

Description

Technical Field

[0001] This utility model relates to electric tricycles or four-wheeled vehicles, and in particular to a split-type hub motor and electric vehicle. Background Technology

[0002] With the continuous development of new energy technologies, electric vehicles (electric tricycles or electric four-wheelers) have become widely popular as a convenient means of transportation.

[0003] In-wheel motors, as the power source, significantly simplify the mechanical structure of electric vehicles by integrating the power unit, transmission unit, and braking unit into the wheel hub, thereby improving space utilization efficiency and energy conversion efficiency. Currently, mainstream designs adopt an integrated structure of the rotor hub and wheel rim, making the rim and motor an inseparable whole. When the tire is damaged or the rim is deformed, traditional structures require disassembling the entire motor assembly. Repairs necessitate disassembling precision components such as bearings and stators, resulting in time-consuming and inefficient operations. When the wheel hub is deformed, the entire motor rotor assembly needs to be replaced, leading to high associated costs due to localized damage. Furthermore, the integrated wheel hub relies on the frame's locking nuts for fixation; repeated disassembly and reassembly wear down the main shaft threads, reducing structural strength and service life.

[0004] While existing integrated hub motor structures have made progress in terms of lightweighting and heat dissipation, this comes at the cost of sacrificing maintenance economy and ease of operation. In particular, electric vehicles frequently encounter complex road conditions, resulting in a high rate of rim damage. How to design a wheel set that not only has the functions of an electric power-assisted hub motor but also allows for easy installation and removal when maintenance is needed has become a pressing technical problem to be solved in the electric power-assisted vehicle field. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a split-type hub motor that is compact in structure, easy to install and disassemble, has high connection strength and low maintenance cost.

[0006] This utility model provides a split-type hub motor, which includes:

[0007] Hub motor housing 1, wherein the side wall of hub motor housing 1 is provided with a first connecting flange 11;

[0008] The rim 2 is used to mount the tire, and the rim 2 is provided with a second connecting flange 21 that can contact the first end of the first connecting flange 11;

[0009] The connecting assembly includes a flange 3, a first connecting bolt 4, and a second connecting bolt 51. The flange 3 is disposed at the second end of the first connecting flange 11. The first connecting bolt 4 passes through the flange 3 and connects to the first connecting flange 11, thereby fixing the flange 3 to the hub motor housing 1. The second connecting bolt 51 passes through the flange 3, the first connecting flange 11, and the second connecting flange 21 in sequence and connects to a nut 52, thereby fixing the wheel rim 2 to the hub motor housing 1.

[0010] This application adopts a split design, separating the hub motor housing from the wheel rim. With the help of a double bolt system, the wheel rim 2 and the motor housing 1 are physically decoupled, realizing an independent disassembly mechanism for the wheel rim, which facilitates maintenance and replacement.

[0011] Furthermore, there are multiple first connecting bolts 4 and / or second connecting bolts 51, which are evenly distributed circumferentially. Using multiple bolts arranged at equal circumferential angles can improve the uniformity of load distribution, avoid stress concentration, and improve the reliability and stability of the connection. The evenly distributed bolt group forms a symmetrical mass distribution, ensuring the eccentricity during high-speed rotation. At the same time, it facilitates the improvement of maintenance and assembly efficiency. When loading and unloading the rim, the bolts are loosened in a diagonal sequence to avoid flange misalignment and jamming, reduce operation time, and improve replacement efficiency.

[0012] Furthermore, the number of the first connecting bolts 4 and the second connecting bolts 51 are the same and they are staggered. The two sets of bolts are arranged in an alternating manner to further ensure uniform force distribution and facilitate loading and unloading.

[0013] Furthermore, the included angle between the first connecting bolt 4 and the two adjacent second connecting bolts 51 is the same.

[0014] Furthermore, the length of the first connecting bolt 4 is less than or equal to the thickness of the first connecting flange 11; this can prevent the first connecting bolt from contacting the second connecting flange, eliminate interference, ensure the locking force of the first connecting bolt, avoid contact with the second connecting flange and avoid wear during operation, and ensure its connection strength and connection reliability.

[0015] Furthermore, the first connecting flange 11 is provided with a first mounting hole 1101 corresponding to the first connecting bolt 4 and a second mounting hole 1102 corresponding to the second connecting bolt 51. The first mounting hole 1101 is a threaded hole, and the second mounting hole 1102 is a smooth hole. The first mounting hole is a threaded hole and is threadedly connected to the first connecting bolt 4 to form a rigid locking unit, which fixes the flange and the motor housing as a whole and undertakes the main positioning function. The second mounting hole is a smooth hole, which allows the second connecting bolt to move slightly in the hole, releasing the thermal expansion stress and radial deformation of the rim. It facilitates the overall assembly or disassembly.

[0016] Furthermore, the flange 3 has a third mounting hole 31 through which the first connecting bolt 4 passes and a fourth mounting hole 32 through which the second connecting bolt 51 passes. The fourth mounting hole 32 is a countersunk hole that can accommodate the head of the second connecting bolt 51 and restrict the rotation of the second connecting bolt 51. When installing the second connecting bolt 51, only one side of the nut needs to be tightened. There is no need for the operator to use a wrench to fix the bolt head, which greatly simplifies the assembly process, reduces tool requirements, reduces the complexity of operation, and improves loading and unloading efficiency.

[0017] Furthermore, the side wall of the fourth mounting hole 32 is provided with a first limiting part, and the head side wall of the second connecting bolt 51 is provided with a second limiting part that can contact the first limiting part and achieve radial limiting, thus forming a limiting structure. The structure is compact, easy to process, and has a good limiting effect.

[0018] Furthermore, the rim 2 is provided with a hole that can accommodate the first connecting flange 11, and the second connecting flange 21 is disposed in the hole, which allows the first connecting flange to be embedded (hidden) in the hole, reducing exposed structures, making the overall layout more compact, and improving the overall aesthetics.

[0019] Furthermore, the end of the hub motor housing 1 is flush with the end of the wheel rim 2, resulting in a compact structure and aesthetically pleasing appearance.

[0020] Meanwhile, this utility model also provides an electric vehicle that uses the aforementioned split-type hub motor, which is an electric tricycle or four-wheeled vehicle.

[0021] This utility model relates to a split-type hub motor, which separates the hub motor housing from the wheel rim. A dual-bolt system achieves physical decoupling between the wheel rim and the motor housing, enabling independent rim disassembly. This allows for quick and efficient rim removal. When the wheel rim is deformed or damaged, only the rim needs to be replaced, avoiding the need to replace the motor rotor as in traditional solutions, significantly reducing maintenance costs. The dual-bolt system design features a first connecting bolt that provides basic positioning between the flange 3 and the motor housing, with its preload ensuring axial rigidity. The second connecting bolt penetrates all three components, forming a multi-layered locking chain that evenly transfers the force from the wheel rim to the motor housing. Furthermore, the flange, acting as a rigid transition component, suppresses the radial vibration of the rim from being transmitted to the motor bearing, reduces the risk of bolt loosening, improves the overall structural stability, and ensures safety and reliability during long-term use. With a split structure, the rim can be made of a different material than the motor housing, optimizing material selection, improving the rim's wear resistance and impact resistance, while reducing overall weight, achieving a balance between performance and cost. This utility model of a split hub motor has a compact structure, enabling detachable connection of the rim, reducing production and maintenance costs, and facilitating installation and removal, thus enhancing the product's market competitiveness. It is suitable for various vehicle models and meets the needs of different users. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the split-type hub motor of this utility model;

[0023] Figure 2 This is a schematic diagram of the split-type hub motor of this utility model from another angle;

[0024] Figure 3 This is an exploded structural diagram of the split-type hub motor of this utility model;

[0025] Figure 4 This is a cross-sectional view of the split-type hub motor of this utility model;

[0026] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0027] Figure 6 This is another planar sectional view of the split-type hub motor of this utility model;

[0028] Figure 7 for Figure 6 Enlarged view of section B in the middle;

[0029] Figure 8 This is a schematic diagram of the hub motor housing of the split hub motor of this utility model;

[0030] Figure 9 This is a cross-sectional view of the hub motor housing of the split hub motor of this utility model;

[0031] Figure 10 This is a schematic diagram of the flange of the split-type hub motor of this utility model. Detailed Implementation

[0032] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] See Figures 1-10 This utility model provides a split-type hub motor, which includes a hub motor housing 1, a wheel rim 2, and a connecting assembly.

[0034] The hub motor housing 1 is the main body of the hub motor, serving as the rotor. An internal stator (not shown) is installed inside, connecting to the vehicle frame. The hub motor housing 1 is cylindrical in shape, with an annular protrusion on its side wall forming a first connecting flange 11. The wheel rim 2 is used to mount the tire, and a second connecting flange 21 is provided on the rim 2. This second connecting flange 21 can contact the first end of the first connecting flange 11. The connecting assembly includes a flange 3, a first connecting bolt 4, and a second connecting bolt 51. The disc 3 is a circular flange structure. The flange 3 is located at the second end of the first connecting flange 11, that is, it can fit against the second end of the first connecting flange 11. The first connecting bolt 4 passes through the flange 3 and connects to the first connecting flange 11. The first connecting bolt 4 fixes the flange 3 to the hub motor housing 1. The second connecting bolt 51 passes through the flange 3, the first connecting flange 11 and the second connecting flange 21 in sequence and connects to the nut 52. The second connecting bolt fixes the rim 2 to the hub motor housing 1, so that it forms an integral structure.

[0035] This application adopts a split design, separating the hub motor housing from the wheel rim. A double-bolt system (first connecting bolt and second connecting bolt) achieves physical decoupling between the wheel rim 2 and the hub motor housing 1, enabling an independent rim disassembly mechanism. Compared to the traditional one-piece structure, this application only requires loosening the second connecting bolt 51 for quick disassembly of the wheel rim 2, resulting in high assembly and disassembly efficiency. When the wheel rim is deformed or damaged, only the wheel rim 2 needs to be replaced, avoiding the need to replace the motor rotor as in traditional solutions, significantly reducing maintenance costs. The double-bolt system design, with the first connecting bolt 4 supporting the connection between the flange 3 and the motor housing 1, further enhances this design. The basic positioning of the housing ensures axial rigidity through its preload; the second connecting bolt 51 penetrates the three components, forming a multi-layer locking chain that evenly transmits the force on the rim to the motor housing; the flange, as a rigid transition component, suppresses the radial vibration of the rim from being transmitted to the motor bearing, reduces the risk of bolt loosening, improves the overall structural stability, and ensures safety and reliability during long-term use; with the split structure, the rim can be made of a different material than the motor housing, optimizing material selection, such as aluminum alloy, to improve the rim's wear resistance and impact resistance, while reducing the overall weight, achieving a balance between performance and cost.

[0036] In this application, there are multiple first connecting bolts 4 and second connecting bolts 51, which are evenly distributed circumferentially. The use of multiple bolts arranged at equal angles circumferentially improves load distribution uniformity, avoids stress concentration, and enhances connection reliability and stability. The evenly distributed bolt group forms a symmetrical mass distribution, ensuring eccentricity during high-speed rotation. Simultaneously, it facilitates improved maintenance and assembly efficiency. When loading and unloading the rim, the bolts are loosened in a diagonal sequence to prevent flange misalignment and jamming, reducing operation time and improving replacement efficiency. Preferably, the number of first connecting bolts 4 and second connecting bolts 51 is the same and they are staggered, with the same angle between the first connecting bolt 4 and any two adjacent second connecting bolts 51. The two sets of bolts are arranged alternately to further ensure uniform force distribution and facilitate loading and unloading. In this embodiment, there are 4-8 first connecting bolts and 4-8 second connecting bolts.

[0037] To improve connection reliability and stability and prevent loosening, gaskets and elastic washers are also provided.

[0038] In order to avoid interference between the first connecting bolt and the second flange, in this application, the length of the first connecting bolt 4 is less than or equal to the thickness of the first connecting flange 11. This can prevent the first connecting bolt from contacting the second connecting flange, eliminate interference, ensure the locking force of the first connecting bolt, avoid contact with the second connecting flange and avoid wear during operation, and ensure its connection strength and connection reliability.

[0039] See Figures 8-9 The first connecting flange 11 has multiple first mounting holes 1101 and second mounting holes 1102 evenly distributed circumferentially. The number of first mounting holes 1101 and second mounting holes 1102 is the same, and they are alternately arranged with the same included angle between each pair. The first mounting hole 1101 corresponds to the first connecting bolt 4, and the second mounting hole 1102 corresponds to the second connecting bolt 51. The first mounting hole 1101 is a threaded hole, and the second mounting hole 1102 is a smooth hole. The first mounting hole is a threaded hole and is threaded to the first connecting bolt 4 to form a rigid locking unit, which fixes the flange and the motor housing as a whole and undertakes the main positioning function. The second mounting hole is a smooth hole, which allows the second connecting bolt to move slightly in the hole, releasing the thermal expansion stress and radial deformation of the rim. It facilitates the overall assembly or disassembly.

[0040] See Figure 10The flange 3 has a circular structure, with third mounting holes 31 and fourth mounting holes 32 evenly distributed circumferentially on the flange 3. There are multiple third mounting holes 31 and fourth mounting holes 32, and the number of both is the same. They correspond to the first and second mounting holes mentioned above, respectively. Specifically, the third mounting hole 31 allows the first connecting bolt 4 to pass through, and the fourth mounting hole 32 allows the second connecting bolt 51 to pass through. Both are smooth holes. In this application, the fourth mounting hole 32 is a countersunk hole. The countersunk hole can accommodate the head of the second connecting bolt 51, while restricting the rotation of the bolt head, thereby restricting the rotation of the second connecting bolt 51. Specifically, in the fourth... The side wall of the mounting hole 32 is provided with a first limiting part, and the head side wall of the second connecting bolt 51 is provided with a second limiting part that can contact the first limiting part and achieve radial limiting. The first limiting part and the second limiting part are limiting surfaces. In this embodiment, the cross-section of the head of the fourth mounting hole and the second connecting bolt is racetrack-shaped or hexagonal, and its side wall forms a limiting part to restrict the circumferential rotation of the second connecting bolt. When installing the second connecting bolt 51, it is only necessary to tighten one side of the nut. There is no need for the operator to use a wrench to fix the bolt head, which greatly simplifies the assembly process, reduces tool requirements, reduces the complexity of operation, and improves loading and unloading efficiency.

[0041] To improve the overall compactness and aesthetics, this application provides a hole in the center of the rim 2. This hole can accommodate the first connecting flange 11, and both have the same diameter, allowing the first connecting flange to be perfectly embedded. The second connecting flange 21 is located within the hole. Specifically, the edge of the hole facing away from the first connecting flange extends inward to form the second connecting flange. This structure allows the first connecting flange to be embedded (hidden) within the hole, reducing exposed structures and making the overall layout more compact. At the same time, it enhances the overall aesthetics. Preferably, the end of the hub motor housing 1 is flush with the end of the rim 2, resulting in a compact structure and an attractive appearance.

[0042] Meanwhile, this utility model also provides an electric vehicle that uses the aforementioned split-type hub motor, which includes an electric tricycle or a four-wheeled vehicle.

[0043] This utility model relates to a split-type hub motor, which separates the hub motor housing from the wheel rim. A dual-bolt system achieves physical decoupling between the wheel rim and the motor housing, enabling independent rim disassembly. This allows for quick and efficient rim removal. When the wheel rim is deformed or damaged, only the rim needs to be replaced, avoiding the need to replace the motor rotor as in traditional solutions, significantly reducing maintenance costs. The dual-bolt system design features a first connecting bolt that provides basic positioning between the flange 3 and the motor housing, with its preload ensuring axial rigidity. The second connecting bolt penetrates all three components, forming a multi-layered locking chain that evenly transfers the force from the wheel rim to the motor housing. Furthermore, the flange, acting as a rigid transition component, suppresses the radial vibration of the rim from being transmitted to the motor bearing, reduces the risk of bolt loosening, improves the overall structural stability, and ensures safety and reliability during long-term use. With a split structure, the rim can be made of a different material than the motor housing, optimizing material selection, improving the rim's wear resistance and impact resistance, while reducing overall weight, achieving a balance between performance and cost. This utility model of a split hub motor has a compact structure, enabling detachable connection of the rim, reducing production and maintenance costs, and facilitating installation and removal, thus enhancing the product's market competitiveness. It is suitable for various vehicle models and meets the needs of different users.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A split-type hub motor, characterized in that, include: A hub motor housing, wherein the side wall of the hub motor housing is provided with a first connecting flange; A wheel rim for mounting a tire, wherein the wheel rim is provided with a second connecting flange that can contact the first end of the first connecting flange; The connecting assembly includes a flange, a first connecting bolt, and a second connecting bolt. The flange is disposed at the second end of the first connecting flange. The first connecting bolt passes through the flange and connects to the first connecting flange, thereby fixing the flange to the hub motor housing. The second connecting bolt passes through the flange, the first connecting flange, and the second connecting flange in sequence and connects to a nut, thereby fixing the wheel rim to the hub motor housing.

2. The split-type hub motor as described in claim 1, characterized in that: The first connecting bolt and / or the second connecting bolt are multiple and evenly distributed circumferentially.

3. The split-type hub motor as described in claim 1, characterized in that: The number of the first connecting bolts and the second connecting bolts are the same and they are staggered.

4. The split-type hub motor as described in claim 3, characterized in that: The angle between the first connecting bolt and the two adjacent second connecting bolts is the same.

5. The split-type hub motor as described in claim 1, characterized in that: The length of the first connecting bolt is less than or equal to the thickness of the first connecting flange.

6. The split-type hub motor as described in claim 1, characterized in that: The first connecting flange is provided with a first mounting hole corresponding to the first connecting bolt and a second mounting hole corresponding to the second connecting bolt. The first mounting hole is a threaded hole and the second mounting hole is a smooth hole.

7. The split-type hub motor as described in claim 1, characterized in that: The flange has a third mounting hole for the first connecting bolt to pass through and a fourth mounting hole for the second connecting bolt to pass through. The fourth mounting hole is a countersunk hole that can accommodate the head of the second connecting bolt and restrict the rotation of the second connecting bolt.

8. The split-type hub motor as described in claim 7, characterized in that: The side wall of the fourth mounting hole is provided with a first limiting part, and the head side wall of the second connecting bolt is provided with a second limiting part that can contact the first limiting part and achieve radial limiting.

9. The split-type hub motor as described in claim 1, characterized in that: The rim is provided with a hole that can accommodate the first connecting flange, and one end edge of the hole extends inward to form a second connecting flange.

10. An electric vehicle, characterized in that: Use the split-type hub motor as described in any one of claims 1-9.

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