Motor and vehicle

Abstract

The invention discloses a motor and a vehicle, and the motor comprises a motor housing which defines an oil supply pipeline, and the oil supply pipeline communicates with the top and the bottom of the motor housing; the stator is fixedly arranged in the motor shell, and the rotor is rotatably arranged in the motor shell and accommodated in the inner side of the stator; the speed reducer is coaxially connected with the rotor, and at least one part of the speed reducer is contained in the inner side of the rotor; and the driving part is arranged on the motor shell, communicates with the oil supply pipeline and is used for pumping lubricating oil at the bottom of the motor shell to the top, and the lubricating oil at the top of the motor shell flows back to the bottom under the action of gravity to cool and lubricate the stator, the rotor and the speed reducer. According to the motor provided by the embodiment of the invention, the speed reducer is arranged on the inner side of the rotor, so that the motor is more compact in structure and convenient to mount and arrange; by arranging the oil supply pipeline, all parts in the motor can be in full contact with lubricating oil, the transmission efficiency of the motor can be improved, and the working reliability and stability of the motor can be improved.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to an electric motor and a vehicle. Background Technology

[0002] In related technologies, existing motors and reducers are generally arranged in series axially, resulting in a long overall axial dimension. This affects the installation and arrangement of the motor. Furthermore, the long axial dimension of the overall structure's lubrication space makes it prone to reliability issues during dynamic driving when the internal lubricating oil level changes drastically, leading to poor lubrication of various components due to cavitation in the lubricating oil pump. At the same time, it is impossible to avoid the problem of oil churning loss during operation caused by the rotating parts of the reducer being immersed in lubricating oil. This results in problems such as low transmission efficiency, excessive system heat generation, and rising lubricating oil temperature, which in turn leads to the oil-cooled motor overheating too quickly and being unable to operate at high power for extended periods. There is room for improvement in this area. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a motor that is highly integrated, small in size, and easy to install and arrange. This motor can prevent the lubrication system from experiencing oil pump cavitation under dynamic operating conditions, ensuring the reliability of the lubrication system. Simultaneously, it can significantly reduce oil churning losses in components, improve the system's transmission efficiency, reduce system energy consumption, reduce system heat generation, ensure long-term high-power operation of the motor, and improve the motor's performance.

[0004] The present invention also proposes a vehicle.

[0005] According to a first aspect of the present invention, an electric motor includes: a motor housing defining an oil supply line communicating with the top and bottom of the motor housing; a stator and a rotor, the stator being fixedly disposed within the motor housing, and the rotor being rotatably disposed within the motor housing and housed inside the stator; a reducer coaxially connected to the rotor, with at least a portion of the reducer housed inside the rotor; and a drive member disposed in the motor housing and communicating with the oil supply line, for pumping lubricating oil from the bottom of the motor housing to the top, and for lubricating oil from the top of the motor housing flowing back to the bottom under gravity to cool and lubricate the stator, the rotor, and the reducer.

[0006] According to the present invention, the motor has a reducer located inside the rotor and coaxially connected to it. This allows the reducer to fully utilize the axial space of the rotor, reducing the axial dimension of the motor, increasing its integration, making the structure more compact, reducing its size, and facilitating installation. By providing an oil supply line connecting the bottom and top of the motor housing and by using a drive unit to pump oil, lubricating oil can continuously flow through the stator, rotor, and reducer under gravity to lubricate and cool the motor. This ensures that each component within the motor is in full contact with the lubricating oil, prevents excessive lubricating oil from submerging the components at the bottom of the motor housing, reduces oil churning resistance, and thus improves the lubrication and cooling effects of the components within the motor. This improves the motor's mechanical efficiency, reduces heat generation, and ultimately enhances its continuous operating capacity, reliability, and stability.

[0007] According to some embodiments of the present invention, the bottom of the motor housing has an oil reservoir for storing lubricating oil, the oil reservoir being located below the stator; the top of the motor housing has a flow divider for distributing lubricating oil, the flow divider being located above the stator, and the flow divider and the oil reservoir being connected through the oil supply pipeline; wherein, a portion of the lubricating oil in the flow divider is adapted to flow through the stator and the rotor under the action of gravity, and another portion of the lubricating oil in the flow divider is adapted to flow through the reducer under the action of gravity.

[0008] In some embodiments, an oil passage cavity is defined between the rotor and the stator, the oil passage cavity is located between the flow divider cavity and the oil storage cavity, and the oil passage cavity communicates with the flow divider cavity and the oil storage cavity, and the rotatable connection between the rotor and the motor housing is located within the oil passage cavity.

[0009] In some embodiments, the reducer defines a mounting cavity for mounting a reduction gear set, the mounting cavity and the flow divider cavity are connected through an oil inlet located on the upper side of the mounting cavity, and the mounting cavity and the oil storage cavity are connected through an oil outlet located on the lower side of the mounting cavity.

[0010] In some embodiments, the reduction gear set and the rotor are coaxially connected, and in the axial direction, the oil inlet and the oil outlet are located on both sides of the reduction gear set.

[0011] In some embodiments, the rotor is provided with a plurality of oil passage holes in the circumferential direction, the oil outlet hole and the oil passage holes are connected, the lubricating oil in the mounting cavity is adapted to flow sequentially through the oil outlet hole and the oil passage holes to the oil storage cavity, and the rotational connection between the reducer and the rotor is located between the oil outlet hole and the oil passage holes.

[0012] According to some embodiments of the present invention, the motor housing includes: a housing body, one side of which is open for mounting the stator and the rotor, the housing body defining the oil supply line, the top of the housing body defining a flow divider cavity, the stator and the rotor being located below the flow divider cavity, and the bottom of the housing body having a return hole; and an oil storage shell, which is located below the housing body and defines an oil storage cavity, the oil storage cavity being connected to the interior of the housing body through the return hole, and the oil storage cavity being connected to the flow divider cavity through the oil supply line.

[0013] In some embodiments, the reducer includes: a reduction housing connected to the housing body for closing the open side of the housing body, the reduction housing defining an oil passage and an installation cavity, the oil passage connecting the flow divider cavity and the installation cavity, and the installation cavity connecting the oil reservoir cavity; and a reduction gear set disposed in the installation cavity and coaxially connected to the rotor.

[0014] According to some embodiments of the present invention, the oil supply pipeline includes two sections that can be connected in sequence; it also includes a heat exchanger, which is disposed in the motor housing and connects the two sections of the oil supply pipeline for cooling lubricating oil.

[0015] A vehicle according to a second aspect of the present invention includes: wheels and a motor according to a first aspect of the present invention, the motor being used to drive the wheels to rotate. By employing the motor, the space occupied by the vehicle can be reduced, and the layout of the vehicle chassis can be made more flexible.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a motor according to some embodiments of the present invention; Figure 2 This is a diagram showing the flow direction of lubricating oil in an electric motor according to some embodiments of the present invention; Figure 3 This is a partial structural schematic diagram of a vehicle according to some embodiments of the present invention; Figure 4 This is a partial structural schematic diagram of a vehicle according to other embodiments of the present invention.

[0018] Figure label: Vehicle 1000, motor 100, wheels 200 Motor housing 10, housing body 11, oil supply line 111, flow divider 112, return hole 113, oil passage 114, oil reservoir 12, oil reservoir 121. Stator 20, spray nozzle 21 Rotor 30, rotor shaft 31, flexible disk 311, input shaft 312, input gear 313, oil passage 314. Reducer 40, reducer housing 41, oil pipeline 411, mounting cavity 412, oil inlet 413, oil outlet 414, end cover 42, oil seal 43, reduction gear set 44, first gear 441, second gear 442, gear ring 443, gear carrier 45, gear shaft 451, output shaft 452. Drive unit 50, heat exchanger 60, suction filter 70, bearing 80. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The following is for reference. Figures 1-4A motor 100 according to an embodiment of the present invention is described.

[0023] like Figures 1-4 As shown, the motor 100 according to an embodiment of the present invention includes: a motor housing 10, a stator 20, a rotor 30, a reducer 40, and a drive component 50. The stator 20 can be fixed inside the motor housing 10, and the rotor 30 is rotatably disposed inside the motor housing 10. The rotor 30 can be accommodated inside the stator 20, so that the rotor 30 can rotate relative to the stator 20 inside the stator 20. The reducer 40 and the rotor 30 can be coaxially connected, so that the rotation of the rotor 30 can drive the components (such as the reduction gear set 44) inside the reducer 40 to rotate, and can drive other components (such as the wheel 200) to rotate through the reducer 40 transmission, which can ensure that the motor 100 works normally.

[0024] At least a portion of the reducer 40 can be accommodated inside the rotor 30, allowing the reducer 40 to fully utilize the axial direction of the rotor 30 (e.g., Figure 1 The space (shown in the front and rear directions) can improve the integration level of the motor 100, make the structure of the motor 100 more compact, reduce the axial dimension of the motor 100, and reduce the volume of the motor 100, which facilitates the installation and arrangement of the motor 100. The motor housing 10 can define an oil supply line 111, which can connect the top and bottom of the motor housing 10.

[0025] A drive component 50 (such as an oil pump) can be mounted on the motor housing 10, and the drive component 50 and the oil supply line 111 can be connected. This allows the drive component 50 to pump the lubricating oil from the bottom of the motor housing 10 to the top, and allows the lubricating oil from the top of the motor housing 10 to flow back to the bottom under gravity to cool and lubricate the stator 20, rotor 30, and reducer 40. This ensures that each component inside the motor 100 is in full and continuous contact with the lubricating oil, and prevents excessive lubricating oil from submerging the components at the bottom of the motor housing 10. This reduces the oil stirring resistance of each component, thereby improving the lubrication and cooling effects of each component inside the motor 100, increasing the transmission efficiency of the motor 100, reducing the heat generated by the motor 100 during operation, and improving the continuous operation capability, reliability, and stability of the motor 100.

[0026] According to the embodiment of the present invention, the motor 100, by placing the reducer 40 inside the rotor 30 and coaxially connecting it with the rotor 30, allows the reducer 40 to make full use of the axial space of the rotor 30, thereby reducing the axial dimension of the motor 100, improving the integration level of the motor 100, and making the structure of the motor 100 more compact. This reduces the volume of the motor 100 and facilitates its installation and arrangement. At the same time, due to the reduction in its axial length, the oil storage volume at the bottom of the motor housing 10 can be reduced, and the movement range of the lubricating oil in the motor 100 under the dynamic driving conditions of the vehicle can be narrowed. This ensures that the connection between the oil supply line 111 and the bottom of the motor housing 10 will not experience air suction problems due to inertia (lubricating oil shifting to one side of the cavity), thus ensuring the reliability and stability of the lubrication of the motor 100.

[0027] By setting up an oil supply line 111 connecting the bottom and top of the motor housing 10, and by setting up a drive unit 50 to pump oil, the lubricating oil can continuously flow through the stator 20, rotor 30 and reducer 40 under the action of gravity to lubricate and cool the motor 100. This allows each component inside the motor 100 to fully contact the lubricating oil, and prevents excessive lubricating oil at the bottom of the motor housing 10 from submerging the components. It also reduces the resistance to oil stirring, thereby improving the lubrication and cooling effect of each component inside the motor 100, improving the transmission efficiency of the motor 100, and improving the reliability and stability of the motor 100's operation.

[0028] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the bottom of the motor housing 10 may have an oil reservoir 121, which can store lubricating oil, and the oil reservoir 121 may be located below the stator 20 (e.g. Figure 1 As shown below, based on ensuring sufficient lubricating oil, the lubricating oil level can be reduced, which can prevent excessive lubricating oil at the bottom of the motor housing 10 from submerging various components, reduce the oil stirring resistance of various components, thereby improving the lubrication and cooling effect of various components inside the motor 100, improving the transmission efficiency of the motor 100, and improving the reliability and stability of the motor 100 operation.

[0029] The top of the motor housing 10 may have a flow divider 112, which can divide the lubricating oil. The flow divider 112 may be located above the stator 20, and the flow divider 112 and the oil storage chamber 121 are connected through the oil supply line 111, so that the lubricating oil can continuously flow through the stator 20, rotor 30 and reducer 40 under the action of gravity to lubricate and cool the motor 100. This allows each component inside the motor 100 to fully contact the lubricating oil, thereby improving the lubrication and cooling effect of each component inside the motor 100, improving the transmission efficiency of the motor 100, and improving the reliability and stability of the motor 100.

[0030] In this system, a portion of the lubricating oil in the flow divider 112 can flow through the stator 20 and rotor 30 under gravity, ensuring that both stator 20 and rotor 30 are in full and continuous contact with the lubricating oil, thereby improving the lubrication and cooling effects of stator 20 and rotor 30. Another portion of the lubricating oil in the flow divider 112 can flow through the reducer 40 under gravity, ensuring that the components inside the reducer 40 are in full and continuous contact with the lubricating oil, thereby improving the lubrication and cooling effects of reducer 40. Thus, each component inside the motor 100 can be independently cooled and lubricated according to its type (existing motor components and existing reducer components), improving the lubrication and cooling effects of each component inside the motor 100, increasing the transmission efficiency of the motor 100, and improving the reliability and stability of the motor 100's operation.

[0031] like Figure 1 and Figure 2 As shown, in some embodiments, the rotor 30 may include a hollow rotor shaft 31, a flexible disk 311, and an input shaft 312. The rotor shaft 31 can rotate relative to the stator 20, and the flexible disk 311 may be disposed on the rotor shaft 31 in the axial direction (e.g., ...). Figure 1 On one side of the front-back direction (as shown) Figure 1 (As shown on the rear side), the input shaft 312 and the rotor shaft 31 are coaxially arranged, and the input shaft 312 can be located in the middle of the flexible disk 311 (at the rotation center).

[0032] One end of the input shaft 312 (e.g.) Figure 1 The rear end shown can be located on one side of the flexible disk 311 (e.g., Figure 1 (as shown on the rear side), the other end of the input shaft 312 (as shown on the rear side), Figure 1 The front end shown can be located on the other side of the flexible disk 311 (e.g., Figure 1 (as shown in the front side) and can be located inside the hollow rotor shaft 31, so that the reducer 40 can make full use of the axial direction of the rotor 30 (such as ... Figure 1 The space (shown in the front and rear directions) allows for a more compact structure of the motor 100, facilitating its installation and arrangement.

[0033] The other end of the input shaft 312 can be inserted into the reducer 40 and equipped with an input gear 313, so that the input shaft 312 and the components (such as the reduction gear set 44) in the reducer 40 are connected by the input gear 313. That is, the rotation of the rotor shaft 31 can drive the flexible disk 311 to rotate, thereby driving the input shaft 312 to rotate and driving other components (such as the wheel 200) to rotate through the reducer 40. It can be understood that the two ends of the input shaft 312 can be rotatably connected to the motor housing 10 and the reducer 40 respectively through the bearing 80, which can support the input shaft 312, reduce the transmission resistance of the input shaft 312, improve the transmission efficiency of the motor 100, and improve the reliability and stability of the motor 100.

[0034] An oil passage 114 can be defined between the rotor 30 and the stator 20. The oil passage 114 can be located between the flow distribution chamber 112 and the oil storage chamber 121, and the oil passage 114 connects the flow distribution chamber 112 and the oil storage chamber 121. This allows a portion of the lubricating oil in the flow distribution chamber 112 to flow through the stator 20 and the rotor 30 to the oil storage chamber 121 under the action of gravity. This ensures that both the stator 20 and the rotor 30 are in full and continuous contact with the lubricating oil, thereby improving the lubrication and cooling effects of the stator 20 and the rotor 30.

[0035] The rotating connection between the rotor 30 and the motor housing 10 can be located within the oil passage chamber 114, meaning that the lubricating oil can lubricate the bearing 80 between the rotor 30 and the motor housing 10. It is understood that the stator 20 can have a spray nozzle 21 on the side near the flow distribution chamber 112, so that the lubricating oil in the flow distribution chamber 112 can be sprayed into the oil passage chamber 114 through the spray nozzle 21. This allows both the stator 20 and the rotor 30 to have efficient contact with the lubricating oil, which can improve the lubrication and cooling effects of the stator 20 and the rotor 30, improve the transmission efficiency of the motor 100, and improve the reliability and stability of the motor 100. In particular, by opening the spray nozzle 21, the lubricating oil can be precisely distributed to control the flow rate of the lubricating oil.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the reducer 40 may define a mounting cavity 412 for mounting the reduction gear set 44. The mounting cavity 412 and the flow divider cavity 112 may be connected through an oil inlet 413, which may be located on the upper side of the mounting cavity 412. The mounting cavity 412 and the oil reservoir 121 may be connected through an oil outlet 414, which may be located on the lower side of the mounting cavity 412, so that another portion of the lubricating oil in the flow divider cavity 112 can flow from top to bottom (e.g., ...). Figure 1The flow of the reduction gear set 44 (shown in the top-to-bottom direction) through the mounting cavity 412 allows the reduction gear set 44 to have full and continuous contact with the lubricating oil, which can improve the lubrication and cooling effect of the reduction gear set 44, improve the transmission efficiency of the motor 100, reduce the heat generated by the motor 100 during operation, lower the operating temperature of the motor 100, and improve the continuous operation capability, reliability, and stability of the motor 100.

[0037] Specifically, the reducer 40 is housed within the hollow rotor shaft 31 (at a position higher than the oil reservoir 121), and the oil outlet 414 of the mounting cavity 412 is located on its lower side (e.g., Figure 1 (As shown below), this allows another portion of the lubricating oil in the diversion chamber 112 to flow through the mounting chamber 412 to the oil storage chamber 121. This prevents excessive lubricating oil accumulation in the mounting chamber 412, prevents at least a portion of the reduction gear set 44 from being submerged in lubricating oil, reduces the oil churning resistance and loss of the reduction gear set 44, and prevents the reduction gear set 44 from entraining air into the lubricating oil, causing it to foam. This ensures the heat dissipation effect of the lubricating oil, thereby improving the lubrication and cooling effect of the reduction gear set 44, increasing the transmission efficiency of the motor 100, reducing the heat generated by the motor 100 during operation, lowering the operating temperature of the motor 100, and improving the continuous operation capability, reliability, and stability of the motor 100.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the reduction gear set 44 and the rotor 30 can be coaxially connected, so that the position of the reduction gear set 44 can be higher than the surface of the lubricating oil. This can prevent excessive lubricating oil from accumulating in the mounting cavity 412, prevent at least a part of the reduction gear set 44 from being submerged in the lubricating oil, reduce the oil churning resistance and oil churning loss of the reduction gear set 44, and prevent the reduction gear set 44 from entraining air into the lubricating oil to cause it to foam. This can ensure the heat dissipation effect of the lubricating oil, thereby improving the lubrication and cooling effect of the reduction gear set 44, improving the transmission efficiency of the motor 100, reducing the heat generated by the motor 100 during operation, lowering the operating temperature of the motor 100, and improving the continuous operation capability, reliability, and stability of the motor 100.

[0039] In the axial direction (e.g.) Figure 1 In the forward and backward direction shown, the oil inlet 413 and the oil outlet 414 can be located on both sides of the reduction gear set 44 (e.g., in the forward and backward direction). Figure 1 (as shown on the front and back sides), so that the lubricating oil in the mounting cavity 412 can be released from one end of the mounting cavity 412 (e.g., under the centrifugal force of the reduction gear set 44) by the centrifugal force of the reduction gear set 44. Figure 1 The rear end shown is thrown to the other end of the mounting cavity 412 (as shown). Figure 1 The front end shown allows the reduction gear set 44 to have full and continuous contact with the lubricating oil, which can improve the lubrication and cooling effect of the reduction gear set 44, improve the transmission efficiency of the motor 100, reduce the heat generated by the motor 100 during operation, lower the operating temperature of the motor 100, and improve the continuous operation capability, reliability, and stability of the motor 100. It is understood that the correct rotation direction should be selected when designing the rotation direction of each gear in the reduction gear set 44 to ensure that the lubricating oil can be thrown from one end of the mounting cavity 412 to the other end under the action of centrifugal force during the forward movement of the vehicle 1000.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the reduction gear set 44 can be a planetary gear set, which can improve the transmission efficiency of the reducer 40. The reduction gear set 44 may include a gear carrier 45, a gear ring 443, a plurality of first gears 441, and a plurality of second gears 442. The gear carrier 45 can be disposed in the mounting cavity 412. The gear carrier 45 may have a plurality of gear shafts 451 parallel to the input shaft 312, and the plurality of gear shafts 451 are arranged in a circumferential direction. The plurality of first gears 441 may be respectively disposed on the plurality of gear shafts 451, and the plurality of first gears 441 are located on the outer periphery of the input gear 313 and respectively mesh with the input gear 313. The plurality of second gears 442 may be respectively disposed on the plurality of gear shafts 451, and the plurality of second gears 442 may be coaxially connected to the plurality of first gears 441 respectively for synchronous rotation. The gear ring 443 may be disposed on the inner periphery of the mounting cavity 412, and the plurality of second gears 442 may be located on the inner side of the gear ring 443 and respectively mesh with the gear ring 443.

[0041] Therefore, the motor 100 can drive the input shaft 312 and the input gear 313 to rotate synchronously via the rotor shaft 31, thereby driving multiple first gears 441 to rotate synchronously around their respective gear shafts 451. This allows multiple second gears 442 to rotate synchronously with the multiple first gears 441. Since the gear ring 443 is fixed, the multiple second gears 442 can rotate around the rotation axis of the input shaft 312, thereby driving the gear carrier 45 to rotate as a whole around the rotation axis of the input shaft 312 via the gear shafts 451. The side of the gear carrier 45 away from the input shaft 312 (e.g., Figure 1 The front side shown may have an output shaft 452, which can be connected to other components (such as a drive shaft) via splines to directly drive the movement of other components (such as wheels 200).

[0042] It is understandable that the opposite sides of the gear carrier 45 (such as...) Figure 1The front and rear sides (as shown) can be rotatably connected to the housing of the reducer 40 (such as the reducer housing 41) via bearings 80, which can support the gear carrier 45 and improve the reliability and stability of the rotation of the gear carrier 45. The output shaft 452 is part of one side of the gear carrier 45. The output shaft 452 can be rotatably connected to the housing of the reducer 40 via bearings 80, which can support the output shaft 452 and improve the reliability and stability of the rotation of the output shaft 452. This can reduce the transmission resistance of the reduction gear set 44, improve the transmission efficiency of the motor 100, and improve the reliability and stability of the operation of the motor 100.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments, the rotor shaft 31 is located on both sides of the portion of the outer periphery of the reducer 40 (e.g., Figure 1 The front and rear sides (as shown) can be rotatably connected to the reducer 40 via bearings 80, which can support the rotor shaft 31, reduce the rotational resistance of the rotor shaft 31, and improve the transmission efficiency of the motor 100.

[0044] The rotor 30 (such as the rotor shaft 31) can be provided with multiple oil passage holes 314 in the circumferential direction. The oil outlet hole 414 and the oil passage hole 314 can be connected, so that the lubricating oil in the mounting cavity 412 can first enter the gap between the rotor shaft 31 and the reducer 40 from the oil outlet hole 414, and then flow to the oil storage cavity 121 from the oil passage hole 314. The rotational connection between the reducer 40 and the rotor 30 can be located between the oil outlet hole 414 and the oil passage hole 314. That is, the lubricating oil in the above gap can fully lubricate the bearing 80 located in the gap under the action of centrifugal force, which can improve the transmission efficiency of the motor 100 and improve the reliability and stability of the motor 100.

[0045] It is understandable that multiple oil passage holes 314 can be located on the side of the gap away from the oil outlet hole 414 (e.g. Figure 1 (As shown on the rear side), so that the lubricating oil can fully lubricate the bearing 80 when flowing through the gap, and the oil passage hole 314 can first connect with the lower part of the oil passage cavity 114 and then connect with the oil storage cavity 121, so that the other part of the lubricating oil in the diversion cavity 112 can also flow through the stator 20 and the rotor 30 under the action of gravity, which can improve the lubrication and cooling effect of the stator 20 and the rotor 30, improve the transmission efficiency of the motor 100, and improve the reliability and stability of the motor 100.

[0046] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the motor housing 10 may include a housing body 11 and an oil reservoir 12, with one side of the housing body 11 (e.g., Figure 1The front side (as shown) is open for mounting the stator 20 and rotor 30. The housing body 11 may define an oil supply line 111, and the top of the housing body 11 may define a flow divider 112. The stator 20 and rotor 30 may be located below the flow divider 112 (e.g., the front side is open for mounting the stator 20 and rotor 30). Figure 1 As shown below), the bottom of the shell body 11 may have a reflux hole 113.

[0047] The oil reservoir 12 can be located below the shell body 11 (e.g., Figure 1 (as shown below), and the oil reservoir 12 can define an oil reservoir 121. The oil reservoir 121 and the interior of the shell body 11 can be connected through the return hole 113, so that a portion of the lubricating oil can return to the oil reservoir 121 through the manifold after lubricating and cooling the stator 20 and rotor 30. The oil reservoir 121 and the distribution chamber 112 can be connected through the oil supply line 111, so that the drive unit 50 can pump the lubricating oil to the distribution chamber 112, which can realize the circulation of lubricating oil and improve the lubrication and cooling effect of each component in the motor 100.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the reducer 40 may include a reduction housing 41, an end cap 42, an oil seal 43, a gear carrier 45, and a reduction gear set 44. The reduction housing 41 may be connected to the housing body 11 to close the open side of the housing body 11 (e.g., Figure 1 (As shown on the front side), the reduction housing 41 can define an oil passage 411 and a mounting cavity 412, the gear carrier 45 can be installed in the mounting cavity 412, and the reduction gear set 44 can be installed on the gear carrier 45 and drively connected to the input shaft 312 extending into the mounting cavity 412.

[0049] End cap 42 can be placed on reduction housing 41 to seal mounting cavity 412. Output shaft 452 of gear carrier 45 can pass through end cap 42, and oil seal 43 can be placed between end cap 42 and output shaft 452 to seal reduction housing 41 and prevent lubricating oil leakage. Oil pipeline 411 can connect diversion cavity 112 and mounting cavity 412, and mounting cavity 412 can connect with oil storage cavity 121, so that another part of lubricating oil can flow back to oil storage cavity 121 after lubricating and cooling reduction gear set 44. It can be understood that output shaft 452 and end cap 42 can be rotatably connected by bearing 80.

[0050] like Figure 1 and Figure 2As shown, according to some embodiments of the present invention, the motor 100 may further include a heat exchanger 60 and a filter 70. The oil supply line 111 may include two sections that can be connected in sequence. The heat exchanger 60 may be disposed on the motor housing 10 and the heat exchanger 60 may connect the two sections of the oil supply line 111 so that the lubricating oil in the oil supply line 111 flows through the heat exchanger 60 to dissipate heat. The filter 70 may be disposed in the oil storage chamber 121 to filter the lubricating oil.

[0051] Since the lubricating oil for the stator 20 and rotor 30 (existing motor internal components) and reducer 40 (existing reducer internal components) is first collected in the oil storage chamber 121 and then pumped to the distribution chamber 112 through the oil supply pipeline 111, centralized cooling and filtration of the lubricating oil shared by all components in the motor 100 can be achieved. This can improve the cooling effect of the lubricating oil, improve the lubrication and cooling effect of all components in the motor 100, improve the transmission efficiency of the motor 100, and improve the reliability and stability of the motor 100. At the same time, it can eliminate the need for an independent water cooling system, reduce the cost of the motor 100, and simplify the structure.

[0052] In this application, in the axial direction (e.g.) Figure 1 As shown in the front and rear directions, the bearings 80 located on both sides of the reducer 40 and the input shaft 312 can be of the same type or different types. Specifically, the selection of the bearing type needs to take into account factors such as component size and working environment so that the bearing 80 can meet the operating requirements of different components (such as reducer 40 and input shaft 312).

[0053] like Figures 1-4 As shown, the vehicle 1000 according to an embodiment of the present invention includes: wheels 200 and motor 100. The motor 100 is used to drive the wheels 200 to rotate. By using the motor 100, the space occupied by the vehicle 1000 can be reduced, and the layout of the chassis of the vehicle 1000 can be more flexible.

[0054] like Figure 3 and Figure 4 As shown, according to some embodiments of the present invention, the number of motors 100 may include multiple motors. Multiple motors 100 may drive a wheel 200 to rotate in pairs or individually to drive the movement of the entire vehicle. Since the torque requirement of a motor 100 that only drives a single wheel 200 to rotate is small, the radial dimension of the motor 100 can also be reduced accordingly, so that it can have extremely small axial and radial dimensions at the same time. This makes it convenient for the motor 100 to be installed on both sides of the vehicle 1000, which can reduce the space occupied on the chassis of the vehicle 1000 and improve the passenger space inside the vehicle. At the same time, it provides more possibilities for the layout of the battery pack, the design of the suspension system and the optimization of the interior space, which is especially suitable for passenger car platforms that are extremely sensitive to space.

[0055] Furthermore, the differential can be omitted, achieving a lighter and lower-cost vehicle 1000. That is, the single motor 100 of this application can drive only one side wheel 200, eliminating the need for a traditional differential. When the vehicle 1000 is equipped with motors 100 on each side, the speed of multiple motors 100 can be independently controlled to achieve the electronic differential function efficiently and accurately. This can reduce the weight of the vehicle 1000, lower the manufacturing cost of the vehicle 1000, and avoid the energy loss caused by adding a differential, thereby improving the power response speed and control precision of the vehicle 1000.

[0056] Furthermore, considering that each wheel 200 can be driven independently by a single motor 100, four-wheel independent drive can be achieved. In the four-wheel independent drive model, through the independent torque and speed control of the four motors 100, advanced driving functions such as on-the-spot turning and U-turns can be easily realized, which can improve the maneuverability and handling performance of the vehicle 1000, thereby enabling advanced chassis functions and more flexible power configuration.

[0057] Other configurations and operations of the motor 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The up-down direction, left-right direction, and front-back direction are defined according to the up-down direction, left-right direction, and front-back direction shown in the figures.

[0058] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric motor, characterized in that, include: An electric motor housing, the electric motor housing defining an oil supply line connecting the top and bottom of the electric motor housing; The stator and rotor are provided, wherein the stator is fixedly disposed within the motor housing, and the rotor is rotatably disposed within the motor housing and accommodated inside the stator; A speed reducer, which is coaxially connected to the rotor, and at least a portion of the speed reducer is housed inside the rotor; A drive unit, which is disposed in the motor housing and connected to the oil supply line, is used to pump the lubricating oil at the bottom of the motor housing to the top, and the lubricating oil at the top of the motor housing flows back to the bottom under the action of gravity to cool and lubricate the stator, the rotor and the reducer.

2. The motor according to claim 1, characterized in that, The bottom of the motor housing has an oil reservoir for storing lubricating oil, and the oil reservoir is located below the stator; The top of the motor housing has a flow divider cavity for diverting lubricating oil. The flow divider cavity is located above the stator, and the flow divider cavity and the oil storage cavity are connected through the oil supply pipeline. Wherein, a portion of the lubricating oil in the flow divider cavity is adapted to flow through the stator and the rotor under the action of gravity, and another portion of the lubricating oil in the flow divider cavity is adapted to flow through the reducer under the action of gravity.

3. The motor according to claim 2, characterized in that, An oil passage cavity is defined between the rotor and the stator. The oil passage cavity is located between the flow divider cavity and the oil storage cavity, and the oil passage cavity connects the flow divider cavity and the oil storage cavity. The rotatable connection between the rotor and the motor housing is located within the oil passage cavity.

4. The motor according to claim 2, characterized in that, The reducer has a mounting cavity for mounting a reduction gear set. The mounting cavity and the flow divider cavity are connected through an oil inlet, which is located on the upper side of the mounting cavity. The mounting cavity and the oil storage cavity are connected through an oil outlet, which is located on the lower side of the mounting cavity.

5. The motor according to claim 4, characterized in that, The reduction gear set and the rotor are coaxially connected, and in the axial direction, the oil inlet and the oil outlet are located on both sides of the reduction gear set.

6. The motor according to claim 4, characterized in that, The rotor has multiple oil passage holes in the circumferential direction. The oil outlet hole and the oil passage hole are connected. The lubricating oil in the mounting cavity is adapted to flow to the oil storage cavity through the oil outlet hole and the oil passage hole in sequence. The rotational connection between the reducer and the rotor is located between the oil outlet hole and the oil passage hole.

7. The motor according to claim 1, characterized in that, The motor housing includes: The housing body has one open side for mounting the stator and the rotor. The housing body defines the oil supply line. The top of the housing body defines a flow divider cavity. The stator and the rotor are located below the flow divider cavity. The bottom of the housing body has a return hole. An oil storage tank is located below the shell body and defines an oil storage cavity. The oil storage cavity and the interior of the shell body are connected through the return hole, and the oil storage cavity and the diversion cavity are connected through the oil supply pipeline.

8. The motor according to claim 7, characterized in that, The speed reducer includes: A reduction gear housing is connected to the housing body and is used to close the open side of the housing body. The reduction gear housing defines an oil passage and an installation cavity. The oil passage connects the diversion cavity and the installation cavity, and the installation cavity connects the oil storage cavity. A reduction gear set is disposed in the mounting cavity and coaxially connected to the rotor.

9. The motor according to claim 1, characterized in that, The oil supply pipeline includes two sections that can be connected sequentially; it also includes: A heat exchanger, located in the motor housing and connected to the two sections of the oil supply pipeline, is used to cool the lubricating oil.

10. A vehicle, characterized in that, include: The wheel and the motor according to any one of claims 1-9, the motor being used to drive the wheel to rotate.

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