Motor assembly and in-wheel motor applying same

Abstract

The utility model discloses a kind of motor assembly and hub motor applied to it, belong to motor technical field, solve the problem of big volume and inconvenient rotation when motor and hub motor assembly in prior art.A kind of motor assembly, for hub motor, including shell body, stator unit and rotor unit, the stator unit and the rotor unit are all located in the shell body inside, the stator unit is sleeved in the rotor unit outer periphery, the rotor unit is connected with the reducer of hub motor;The shell body is cantilevered with the reducer in the hub motor connection.The utility model uses, the shell body is cantilevered with the reducer in the hub motor connection, assembly is convenient and small in size, the stator unit drives the rotor unit rotation, the rotor unit drives the reducer rotation of hub motor, to drive hub motor rotation in turn, hub motor is transmitted to power on wheel.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a motor assembly and a hub motor using the same. Background Technology

[0002] With the rapid development of new energy vehicles such as electric bicycles, there are higher requirements for drive motors that are efficient, compact, and adaptable to the needs of different vehicles. Traditional motors are relatively large, and the motor is connected to the reducer in the hub motor. The motor and reducer are often connected through an input shaft, which takes up a lot of space and makes the bicycle heavy, which is not lightweight enough. Utility Model Content

[0003] The purpose of this utility model is to provide a motor assembly and a hub motor using the same, aiming to solve the problems of large size and inconvenient conversion when assembling motors and hub motors in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electric motor assembly for a hub motor includes a housing body, a stator unit, and a rotor unit. Both the stator unit and the rotor unit are disposed inside the housing body. The stator unit is sleeved around the outer periphery of the rotor unit. The rotor unit is connected to a reducer in the hub motor. The housing body is cantilevered to the reducer in the hub motor. In use, the stator unit drives the rotor unit to rotate, and the rotor unit drives the reducer of the hub motor to rotate.

[0006] In some embodiments, the housing body includes a first housing and a second housing connected to the first housing, the second housing being connected to a reducer cantilever in the hub motor.

[0007] In some embodiments, the second housing is provided with a stop, and the second housing is connected to the reducer in the hub motor through the stop.

[0008] In some embodiments, the rotor unit has a hollow structure at its axial center.

[0009] In some embodiments, the cross-section of the hollow structure on the rotor unit is circular.

[0010] In some embodiments, the motor assembly further includes an output shaft that passes through the hollow structure and is connected to the rotor unit, and the rotor unit drives the output shaft to rotate.

[0011] In some embodiments, the heat dissipation hole is provided at the end of the first housing away from the second housing.

[0012] In some embodiments, the rotor unit is provided with holes along the circumferential direction.

[0013] In some embodiments, the stator unit is provided with a groove along the circumferential direction.

[0014] The present invention adopts another technical solution as follows: a hub motor, including the motor assembly, reducer and hub housing, wherein the motor assembly is connected to the reducer and the motor assembly and the reducer are disposed inside the hub housing.

[0015] Compared with the prior art, in use, the outer shell body is cantilevered to the reducer in the hub motor, which is convenient to assemble and has a small size. The stator unit drives the rotor unit to rotate, the rotor unit drives the reducer of the hub motor to rotate, thereby driving the hub motor to rotate, and the hub motor transmits power to the wheel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a motor assembly provided in Embodiment 1 of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of a motor assembly provided in Embodiment 1 of the present utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of a motor assembly provided in Embodiment 1 of this utility model.

[0019] In the figure, 1. Outer shell body, 11. First outer shell, 111. Heat dissipation hole, 12. Second outer shell, 121. Stop, 2. Stator unit, 21. Groove, 3. Rotor unit, 31. Hole, 4. Output shaft. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] In the description of this utility model, it should be clarified that the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," and "horizontal," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are merely for the convenience of describing this utility model. They do not imply that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1

[0023] The present invention provides a motor assembly in embodiment 1, such as... Figure 1 As shown, a hub motor includes a housing body 1, a stator unit 2, and a rotor unit 3. The stator unit 2 and the rotor unit 3 are both located inside the housing body 1. The stator unit 2 is sleeved on the outer periphery of the rotor unit 3. The rotor unit 3 is connected to the reducer of the hub motor. The housing body 1 is cantilevered to the reducer in the hub motor. In use, the stator unit 2 drives the rotor unit 3 to rotate, and the rotor unit 3 drives the reducer of the hub motor to rotate.

[0024] After adopting the above solution, the motor assembly is applied to the hub motor. The housing body 1 is cantilevered to the reducer in the hub motor. In use, the housing body 1 is cantilevered to the reducer in the hub motor, which is convenient to assemble and has a small size. The stator unit 2 drives the rotor unit 3 to rotate, and the rotor unit 3 drives the reducer of the hub motor to rotate, thereby driving the hub motor to rotate. The hub motor transmits power to the wheel.

[0025] In the specific implementation process of this embodiment 1, such as Figure 1 As shown, the outer casing 1 includes a first outer casing 11 and a second outer casing 12 connected to the first outer casing 11. The second outer casing 12 is connected to the reducer cantilever in the hub motor.

[0026] More specifically, the outer casing 1 includes a first outer casing 11 and a second outer casing 12. The second outer casing 12 is connected to the cantilever of the reducer in the hub motor. The connection between the second outer casing 12 and the cantilever of the reducer in the hub motor facilitates installation and reduces the size of the hub motor.

[0027] In the specific implementation of this embodiment 1, the second outer shell 12 is provided with a stop 121, and the second outer shell 12 is connected to the reducer in the hub motor through the stop 121.

[0028] More specifically, the second housing 12 is connected to the reducer in the hub motor via the stop 121, and the stop connection makes it more convenient to assemble the motor assembly with the reducer in the hub motor.

[0029] In the specific implementation process of this embodiment 1, such as Figure 2 As shown, the rotor unit 3 has a hollow structure in the middle along the axial direction.

[0030] In the specific implementation process of this embodiment 1, such as Figure 2 As shown, the cross-section of the hollow structure is circular.

[0031] More specifically, rotor unit 3 has a hollow structure along the axial center. The hollow structure ensures strength while hollowing out the internal structure to achieve the purpose of weight reduction.

[0032] Furthermore, the hollow structure on rotor unit 3 has a circular cross-section, which facilitates the subsequent installation of the output shaft in the motor assembly.

[0033] Furthermore, the hollow structure is not limited to a circle; it can also be an ellipse, an arch, a square, a trapezoid, or other shapes.

[0034] In the specific implementation process of this embodiment 1, such as Figure 2 As shown, the motor assembly also includes an output shaft 4, which passes through the hollow structure and is connected to the rotor unit 3, and the rotor unit 3 drives the output shaft 4 to rotate.

[0035] More specifically, the output shaft 4 passes through the hollow structure, and the rotor unit 3 drives the output shaft 4 to rotate. In turn, the output shaft 4 connects with other components in the hub motor, thereby driving the other components in the hub motor to rotate.

[0036] Furthermore, the output shaft 4 is hollow inside, allowing for the installation of wiring harnesses to ensure the connection between the motor assembly and other components.

[0037] In the specific implementation process of this embodiment 1, such as Figure 2 As shown, the first outer shell 11 and the second outer shell 12 are movably connected.

[0038] More specifically, the first outer shell 11 and the second outer shell 12 are movably connected, which facilitates the assembly of the first outer shell 11 and the second outer shell 12. The first outer shell 11 and the second outer shell 12 can be directly connected by a slot, a buckle, a magnetic attraction, a stop or other movable connection method.

[0039] Furthermore, the stator unit 2 and the rotor unit 3 are located inside the outer casing 1. A detection element is provided at the end of the first outer casing 11 away from the second outer casing 12. The detection element identifies changes in the rotational speed of the rotor unit 3.

[0040] Furthermore, the detection component includes a Hall plate, which is disposed on the rotor unit 3. The high or low electrical signal generated by the relative motion between the Hall plate and the rotor unit 3 is used to identify changes in rotational speed.

[0041] In the specific implementation process of this embodiment 1, such as Figure 1 As shown, the first outer shell 11 has the heat dissipation hole 111 at the end away from the second outer shell 12.

[0042] More specifically, the first outer shell 11 is provided with a heat dissipation hole 111 at the end away from the second outer shell 12. The heat dissipation hole 111 dissipates heat from the rotor unit 3 inside the first outer shell 11 and the second outer shell 12. The shape of the heat dissipation hole 111 is not limited and can be circular, rhomboid, rectangular or other shapes.

[0043] In the specific implementation process of this embodiment 1, such as Figure 3 As shown, the rotor unit 3 has holes 31 arranged along the circumferential direction.

[0044] More specifically, the rotor unit 3 is provided with holes 31 along the circumferential direction. The holes 31 can be set to be circular, rectangular, rhomboid or other shapes. The holes 31 are evenly distributed in the circumferential direction of the rotor unit 3. The holes 31 can reduce the stress level and reduce stress concentration.

[0045] In the specific implementation process of this embodiment 1, such as Figure 3 As shown, the stator unit 2 has a groove 21 along the circumferential direction.

[0046] More specifically, the stator unit 2 is provided with a groove 21 along the circumferential direction. By setting fasteners on the groove 21, the stator unit 2 is connected to the outer shell body 1 through the fasteners on the groove 21, ensuring that the outer shell body 1 will not shake when the rotor unit 3 inside rotates, making it more secure.

[0047] Fasteners can be screws, bolts, or other functional components.

[0048] The workflow provided in Embodiment 1 of this utility model is as follows: the stator unit 2 drives the rotor unit 3 to rotate, the rotor unit 3 transmits the force of the rotor unit 3 to the output shaft 4, and then the output shaft 4 transmits the force to other components of the hub motor. The motor assembly drives the reducer in the hub motor, and then the outer shell body 1 is cantilevered to the reducer in the hub motor, so that the motor assembly is easy to assemble and reduces the volume.

[0049] Example 2

[0050] The present invention provides a hub motor in embodiment 2, comprising a motor assembly, a reducer and a hub housing as described in embodiment 1, wherein the motor assembly is connected to the reducer and the motor assembly and the reducer are disposed inside the hub housing.

[0051] More specifically, the motor assembly is connected to the reducer, providing power to the reducer, thereby enabling the hub motor to rotate, which in turn drives the wheel to rotate.

[0052] In summary, this utility model applies the motor assembly to a hub motor. The housing body 1 is cantilevered to the reducer in the hub motor. In use, the housing body 1 is cantilevered to the reducer in the hub motor. The stator unit 2 drives the rotor unit 3 to rotate, and the rotor unit 3 drives the reducer of the hub motor to rotate, thereby driving the hub motor to rotate. The hub motor then transmits power to the wheel.

[0053] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor assembly for a hub motor, characterized in that, The device includes a housing body (1), a stator unit (2), and a rotor unit (3). The stator unit (2) and the rotor unit (3) are located inside the housing body (1). The stator unit (2) is sleeved on the outer periphery of the rotor unit (3). The rotor unit (3) is connected to the reducer of the hub motor. The housing body (1) is cantilevered to the reducer in the hub motor. In use, the stator unit (2) drives the rotor unit (3) to rotate, and the rotor unit (3) drives the reducer of the hub motor to rotate.

2. The motor assembly according to claim 1, characterized in that, The outer casing (1) includes a first outer casing (11) and a second outer casing (12) connected to the first outer casing (11), the second outer casing (12) being connected to the reducer cantilever in the hub motor.

3. The motor assembly according to claim 2, characterized in that, The second housing (12) is provided with a stop (121), and the second housing (12) is connected to the reducer in the hub motor through the stop (121).

4. The motor assembly according to any one of claims 1-3, characterized in that, The rotor unit (3) has a hollow structure in the middle along the axial direction.

5. The motor assembly according to claim 4, characterized in that, The cross-section of the hollow structure on the rotor unit (3) is circular.

6. The motor assembly according to claim 4, characterized in that, The motor assembly also includes an output shaft (4), which passes through the hollow structure and is connected to the rotor unit (3), and the rotor unit (3) drives the output shaft (4) to rotate.

7. The motor assembly according to claim 2, characterized in that, The first outer shell (11) has a heat dissipation hole (111) at the end away from the second outer shell (12).

8. The motor assembly according to claim 4, characterized in that, The rotor unit (3) has holes (31) arranged along the circumferential direction.

9. The motor assembly according to claim 4, characterized in that, The stator unit (2) has a groove (21) along the circumferential direction.

10. A hub motor, characterized in that, It includes a motor assembly, a reducer, and a wheel hub housing as described in any one of claims 1-9, wherein the motor assembly is connected to the reducer, and the motor assembly and the reducer are disposed within the wheel hub housing.

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