Hub motor and vehicle

Abstract

The invention discloses a hub motor and a vehicle, and relates to the technical field of hub motors, and the hub motor specifically comprises a hub; the diaphragm assembly is arranged in an inner cavity of the hub, a middle cavity is defined by the diaphragm assembly and the inner wall of an end cover of the hub, the diaphragm assembly is an elastic diaphragm, and exhaust holes communicating with the middle cavity and the external environment of the hub are formed in the end cover; according to the hub motor and the vehicle, the middle cavity is independently isolated in the internal cavity through the elastic diaphragm assembly, and the middle cavity is communicated with the external environment through the exhaust holes, so that the internal cavity is not directly communicated with the external environment, and dust and water vapor in the external environment are prevented from entering the internal cavity to corrode the hub motor; and through elastic deformation of the diaphragm assembly, the effective volume ratio of the inner cavity to the middle cavity is changed, and then pressure balance between the inner cavity and the external environment is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub motors, and more specifically, to a wheel hub motor and a vehicle. Background Art

[0002] As the driving part of electric vehicles, the hub motor generates heat when it is working. There is an internal cavity inside the hub motor, and the rotor and stator of the motor are located in the internal cavity. When the motor rotates, the heat generated will cause a large positive pressure in the internal cavity, which will produce a large pressure difference with the external space of the hub motor, and easily damage the sealing structure inside the motor, such as the end cover sealant, oil seal, and other seals on the shaft.

[0003] Furthermore, when the hub motor is wading through water, the external liquid quickly cools the motor, thereby forming a large pressure difference inside and outside the motor, further accelerating the service life of the weak seal.

[0004] In the prior art, a main shaft hole is generally used, and a hose and a one-way valve are installed on the hole to achieve the balance of the internal and external pressures of the hub motor. On the one hand, this method relies on the life of the one-way valve and the hose. After the hose ages and breaks, the balance of the internal and external pressure difference is lost, and it is easy to cause water to enter the hub, resulting in poor use effect. On the other hand, this method has too fast pressure transmission speed, and the heat in the hub is quickly discharged, which is not conducive to maintaining the hub motor in a high level of output temperature range.

[0005] In summary, how to solve the problem of pressure balance between the internal and external spaces of the hub motor and water ingress into the hub is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a hub motor, which isolates an intermediate cavity in the internal cavity through an elastic diaphragm assembly, and connects the intermediate cavity and the external environment through an exhaust hole, so that the internal cavity is not directly connected to the external environment, thereby preventing dust and water vapor from the external environment from entering the internal cavity and causing corrosion to the hub motor, and through the elastic deformation of the diaphragm assembly, the effective volume ratio of the internal cavity and the intermediate cavity is changed, thereby achieving pressure balance between the internal cavity and the external environment.

[0007] Another object of the present invention is to provide a vehicle including the above-mentioned hub motor, which has the same technical features and can solve the same technical problems.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A wheel hub motor, comprising:

[0010] Wheel hub;

[0011] A diaphragm assembly is disposed in the internal cavity of the wheel hub and together with the inner wall of the end cover of the wheel hub forms an intermediate cavity, the diaphragm assembly is an elastic diaphragm, and the end cover is provided with an exhaust hole connecting the intermediate cavity and the external environment of the wheel hub;

[0012] Wherein, the diaphragm assembly is recessed toward a side away from the end cover to form a plurality of small air chambers, and all the small air chambers together constitute the intermediate cavity.

[0013] Preferably, a protective component is provided on one side of the diaphragm component close to the internal cavity, and the edge of the protective component presses and seals the edge of the diaphragm component to the inner wall of the end cover;

[0014] A transition cavity is arranged between the protection component and the diaphragm component, and a vent hole communicating with the transition cavity and the internal cavity is arranged in the protection component.

[0015] Preferably, the surface of the diaphragm assembly is provided with a first protrusion and a second protrusion recessed toward a side away from the end cover, the outer surface of the first protrusion abuts against the end surface of the protective assembly, and the transition cavity is formed between the outer surface of the second protrusion and the protective assembly.

[0016] Preferably, the diaphragm assembly is an annular structure, and the first protrusion and the second protrusion are both annular structures and the gyration radius increases successively.

[0017] Preferably, a plurality of radially arranged connecting portions are provided in the diaphragm assembly, and the connecting portions divide the first protruding portion and the second protruding portion into a plurality of groups of fan-shaped areas.

[0018] Preferably, a plurality of end cover ribs are provided on a side of the end cover close to the diaphragm assembly, and a plurality of protective ribs are provided on a side of the protective assembly close to the diaphragm assembly, the positions of the protective ribs correspond one to one with the positions of the end cover ribs, and the connecting portion is provided in a gap between the protective ribs and the end cover ribs, and the width of the gap is not less than the thickness of the connecting portion, so as to enable the connecting portion to move laterally in the gap.

[0019] Preferably, the surface of the diaphragm assembly is provided with a groove portion protruding toward one side of the end cover, and the length direction of the groove portion is consistent with the length direction of the second protruding portion and / or the first protruding portion;

[0020] And the groove portion and the first convex portion are located on both sides of the second convex portion.

[0021] Preferably, a plurality of groups of first positioning columns and second positioning columns are vertically arranged on both side surfaces of the diaphragm assembly, a first positioning hole for the first positioning column to be inserted is arranged on the inner wall surface of the end cover, and a second positioning hole for the second positioning column to be inserted is arranged on the side wall of the protective assembly close to the diaphragm assembly.

[0022] A vehicle comprises the wheel hub motor described in any one of the above.

[0023] Compared with the prior art, the hub motor provided by the present invention has at least the following beneficial effects:

[0024] 1. An elastic diaphragm assembly is used to separate the middle cavity in the internal cavity of the wheel hub from the external environment. When the pressure in the internal cavity changes, the effective volume ratio of the internal cavity and the middle cavity can be changed through the elastic deformation of the diaphragm assembly, and the middle cavity is connected to the external environment through the exhaust hole, thereby achieving pressure balance between the internal cavity and the external environment, and preventing dust and moisture from the external environment from directly entering the internal cavity, thereby reducing the impact on the hub motor.

[0025] 2. When the diaphragm assembly is deformed, a certain driving force is required, that is, there needs to be a certain pressure difference between the pressure in the internal cavity and the external pressure, thereby slowing down the heat discharge rate in the hub, helping to keep the motor in the high-efficiency output temperature range, thereby improving the output efficiency of the motor.

[0026] 3. The surface of the diaphragm assembly itself is concave to form several small air chambers, which increases the effective contact area between the diaphragm assembly and the internal cavity and the middle cavity. Therefore, when there is the same pressure difference between the internal cavity and the middle cavity, the diaphragm assembly can obtain a greater deformation pressure, making the diaphragm assembly more likely to deform, thereby improving the sensitivity of the pressure balance adjustment inside and outside the wheel hub.

[0027] The vehicle provided by the present invention, including the above-mentioned wheel hub motor, has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of a specific wheel hub provided by the present invention;

[0030] Figure 2 A cross-sectional view of the wheel hub provided by the present invention;

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 This is a schematic structural diagram of the diaphragm assembly provided by the present invention;

[0033] Figure 5 It is a schematic diagram of assembling the diaphragm assembly and the protective assembly provided by the present invention;

[0034] Figure 6 It is a schematic diagram of the assembly of the end cover, diaphragm assembly and protection assembly provided by the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the end cover provided by the present invention close to the diaphragm assembly;

[0036] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0037] Fig. 9 A cross-sectional view of the end cover provided by the present invention;

[0038] Fig.10 for Fig. 9 Enlarged view of point C in the middle;

[0039] Fig.11 for Fig. 9 An enlarged view of the second embodiment at C in the middle;

[0040] Fig.12 for Fig. 9 An enlarged view of the third embodiment at C in the middle.

[0041] In the figure:

[0042] 1. Internal cavity;

[0043] 2. Middle cavity;

[0044] 3. Diaphragm assembly; 31. First protrusion; 32. Second protrusion; 33. Connecting portion; 34. First positioning column; 35. Groove portion; 36. Notch; 37. Sealing protrusion; 38. Second positioning column;

[0045] 4. End cover; 41. Outer sealing ring protrusion; 42. Inner sealing ring protrusion; 43. Exhaust hole; 44. End cover rib; 45. Water blocking cap; 46. First positioning hole; 47. Threaded hole;

[0046] 5. Protective assembly; 51. Ventilation hole; 52. Second positioning hole; 53. Screw; 54. Protective rib;

[0047] 6. Transition cavity;

[0048] Figure 8 The direction of the arrow in the figure is the direction of rotation of the hub when it is working. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The core of the present invention is to provide a hub motor, which isolates an intermediate cavity in the internal cavity through an elastic diaphragm assembly, and connects the intermediate cavity and the external environment through an exhaust hole, so that the internal cavity is not directly connected to the external environment, thereby preventing dust and water vapor from the external environment from entering the internal cavity and causing corrosion to the hub motor, and through the elastic deformation of the diaphragm assembly, the effective volume ratio of the internal cavity and the intermediate cavity is changed, thereby achieving pressure balance between the internal cavity and the external environment.

[0051] Another core of the present invention is to provide a vehicle including the above-mentioned hub motor, which has the same technical features and can solve the same technical problems.

[0052] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a wheel hub motor, comprising:

[0053] Wheel hub;

[0054] The diaphragm assembly 3 is arranged in the internal cavity 1 of the wheel hub, and together with the inner wall of the end cover 4 of the wheel hub, forms an intermediate cavity 2. The diaphragm assembly 3 is an elastic diaphragm, and the end cover 4 is provided with an exhaust hole 43 connecting the intermediate cavity 2 and the external environment of the wheel hub;

[0055] The diaphragm assembly 3 is recessed toward a side away from the end cover 4 to form a plurality of small air chambers, and all the small air chambers together constitute the intermediate cavity 2 .

[0056] like Figure 2 and Figure 3 As shown, an independent intermediate cavity 2 is separated from the internal cavity 1 of the wheel hub by an elastic diaphragm assembly 3. When the temperature change of the motor causes the pressure change of the internal cavity 1, the diaphragm assembly 3 can be forced to undergo elastic deformation to change the effective volume ratio of the internal cavity 1 and the intermediate cavity 2. The intermediate cavity 2 is directly connected to the external environment through the exhaust hole 43. Therefore, the pressure balance between the internal cavity 1 and the external environment is achieved through the elastic deformation of the diaphragm assembly 3.

[0057] Moreover, the internal cavity 1 is isolated from the middle cavity 2 and the external environment by the diaphragm assembly 3, which effectively prevents dust and rainwater from the external environment from entering the internal cavity 1 of the wheel hub, avoids corrosion to the motor, and effectively extends the service life of the motor.

[0058] At the same time, arranging the intermediate cavity 2 in the internal cavity 1 can make the diaphragm assembly 3 inside the shell of the wheel hub, which helps to slow down the aging speed of the diaphragm assembly 3. At the same time, the diaphragm assembly 3 is recessed to one side to form a number of small air chambers, which effectively increases the effective contact area between the two sides of the diaphragm assembly 3 and the intermediate cavity 2 and the internal cavity 1, thereby enabling the intermediate cavity 2 and the internal cavity 1 to obtain a greater deformation force under the same pressure difference; at the same time, when the diaphragm assembly 3 is deformed, it will first deform at the recessed position, and the driving force required for the overall deformation of the diaphragm assembly 3 is smaller, thereby enabling the diaphragm assembly 3 to quickly respond to the pressure changes in the internal cavity 1, thereby balancing the pressure between the internal cavity 1 and the external environment.

[0059] In addition, since the diaphragm assembly 3 is an elastic part, a certain pressure difference is required on both sides to drive it to deform and maintain its posture after deformation, so that a certain pressure difference can exist between the internal cavity 1 and the external environment, thereby slowing down the heat discharge rate of the internal cavity 1, so that the motor is in a temperature range of high-efficiency output, thereby improving the output efficiency of the motor.

[0060] In some embodiments, a protective component 5 is provided on one side of the diaphragm component 3 close to the internal cavity 1, and the edge of the protective component 5 presses and seals the edge of the diaphragm component 3 to the inner wall of the end cover 4;

[0061] A transition cavity 6 is provided between the protection component 5 and the diaphragm component 3 , and a vent hole 51 communicating with the transition cavity 6 and the internal cavity 1 is provided in the protection component 5 .

[0062] like Figure 2 and Figure 3 As shown, a protective component 5 is provided on the side of the diaphragm component 3 away from the end cover 4, so that the diaphragm component 3 is separated from other components in the internal cavity 1, so as to prevent the diaphragm component 3 from interfering with other components in the internal cavity 1 due to deformation, such as contact with moving parts such as the rotor and stator in the internal cavity 1, which may cause damage to the diaphragm component 3;

[0063] At the same time, if Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the edge of the protective component 5 directly presses the edge of the diaphragm component 3 onto the inner wall of the end cover 4, and the protective component 5 is directly fixedly connected to the end cover 4 by screws 53, thereby ensuring the sealing between the edge of the diaphragm component 3 and the inner wall of the end cover 4, that is, ensuring the sealing between the intermediate cavity 2 and the internal cavity 1;

[0064] At the same time, if Figure 3 As shown, annular sealing protrusions 37 are provided on both sides of the edge of the diaphragm assembly 3. When the protective assembly 5 presses the edge of the diaphragm assembly 3 onto the inner wall of the end cover 4, the sealing protrusion 37 is squeezed and deformed, thereby improving the sealing of the contact position between the diaphragm assembly 3 and the end cover 4 and the protective assembly 5.

[0065] like Figure 4 and Figure 5 As shown, a notch 36 is provided at the edge of the diaphragm assembly 3 for circumventing the screw 53 and preventing mistakes during installation, thereby ensuring that the relative positions of the diaphragm assembly 3, the end cover 4 and the protective assembly 5 are accurate.

[0066] In some embodiments, the surface of the diaphragm assembly 3 is provided with a first protrusion 31 and a second protrusion 32 which are recessed toward the side away from the end cover 4, the outer surface of the first protrusion 31 abuts against the end surface of the protective assembly 5, and a transition cavity 6 is formed between the outer surface of the second protrusion 32 and the protective assembly 5.

[0067] like Figure 3 and Figure 4 As shown, the protrusion height of the first protrusion 31 is greater than the height of the second protrusion 32, and the outer surface of the first protrusion 31 directly contacts the end surface of the protective component 5, and the outer surface of the second protrusion 32 and the inner wall of the protective component 5 form a transition cavity 6, and the transition cavity 6 is connected with the internal cavity 1 through the vent hole 51, so when the pressure of the internal cavity 1 increases, the pressure in the transition cavity 6 rises synchronously, and the pressure acts on the outer surface of the second protrusion 32, causing the second protrusion 32 to deform first, while the first protrusion 31 has no force on its surface because its outer surface contacts the inner surface of the protective component 5;

[0068] When the pressure difference between the internal cavity 1 and the external environment exceeds a set amount, the deformation of the second protrusion 32 exceeds a set amount, and the first protrusion 31 is driven to deform. At this time, the outer surface of the first protrusion 31 is separated from the inner wall of the protective component 5, and the pressure in the transition cavity 6 acts on the outer surface of the first protrusion 31 synchronously, causing the first protrusion 31 and the second protrusion 32 to deform at the same time, that is, the graded deformation of the diaphragm component 3 is achieved;

[0069] Specifically, when the pressure difference between the internal cavity 1 and the external environment is small, the internal and external pressure difference is balanced only by the deformation of the second protrusion 32. When the pressure difference between the internal cavity 1 and the external environment is large, the internal and external pressure difference is balanced by the simultaneous deformation of the first protrusion 31 and the second protrusion 32, thereby achieving graded deformation of the diaphragm assembly 3.

[0070] By analyzing the deformation mode, the second protrusion 32 is deformed preferentially to cope with the common internal and external pressure difference fluctuations, and the diaphragm assembly 3 is deformed locally instead of the whole deformation, thereby reducing the loss of the diaphragm assembly 3 and prolonging its service life.

[0071] In some embodiments, the diaphragm assembly 3 is an annular structure, and the first protrusion 31 and the second protrusion 32 are both annular structures and the gyration radius increases successively.

[0072] like Figure 2 As shown, the diaphragm assembly 3 adopts an annular structure, and its inner ring diameter is larger than the main shaft diameter of the hub motor, which will not interfere with the main shaft, and the intermediate cavity 2, the diaphragm assembly 3 and the protective assembly 5 can be arranged coaxially with the main shaft, which helps to ensure the dynamic balance of the hub motor and facilitates production and assembly.

[0073] At the same time, if Figure 3 and Figure 4 As shown, the radius of gyration of the first protrusion 31 is smaller than the radius of gyration of the second protrusion 32. Therefore, when the first protrusion 31 and the second protrusion 32 have the same width, the second protrusion 32 can obtain a larger surface area. Then, when the surface pressures of the first protrusion 31 and the second protrusion 32 are the same, the second protrusion 32 can obtain a greater pressure and then deform first to adapt to the high-frequency pressure difference fluctuations between the internal cavity 1 and the external environment.

[0074] In some embodiments, a plurality of connecting portions 33 arranged in the radial direction are provided in the diaphragm assembly 3 , and the connecting portions 33 divide the first protruding portion 31 and the second protruding portion 32 into a plurality of groups of fan-shaped areas.

[0075] like Figure 4 As shown, the connecting portion 33 is a non-recessed area on the surface of the diaphragm assembly 3, which separates the first protrusion 31 and the second protrusion 32 in the recessed area into a plurality of fan-shaped areas, which helps to reduce the surface area of ​​a single first protrusion 31 and a second protrusion 32, and reduce the force required for their deformation, thereby improving the sensitivity of the pressure difference regulation on both sides of the diaphragm assembly 3.

[0076] At the same time, the first protrusion 31 and the second protrusion 32 are divided into a plurality of fan-shaped areas, so the side walls adjacent to the connecting portion 33 are also in contact with the gas in the internal cavity 1 and are also subjected to the force provided by the pressure, which can cause the first protrusion 31 and the second protrusion 32 to deform, thereby further improving the sensitivity of the pressure difference regulation.

[0077] In some embodiments, a plurality of end cover ribs 44 are provided on one side of the end cover 4 close to the diaphragm assembly 3, and a plurality of protective ribs 54 are provided on one side of the protective assembly 5 close to the diaphragm assembly 3. The positions of the protective ribs 54 correspond one to one with the end cover ribs 44. The connecting portion 33 is provided in the gap between the protective ribs 54 and the end cover ribs 44. The width of the gap is not less than the thickness of the connecting portion 33, so as to enable the connecting portion 33 to move laterally in the gap.

[0078] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, by adding the end cover ribs 44 and the protective ribs 54, the diaphragm assembly 3 can be stably located in the relative middle position between the end cover 4 and the protective assembly 5, and will not be directly and completely fitted with the end cover 4 or the protective assembly 5, thereby ensuring the stability of the pressure difference regulation.

[0079] When the local deformation of the diaphragm assembly 3 exceeds the setting, it may involve the problem of materials in other areas extending to this area. Therefore, the gap width is set to be no less than the thickness of the connecting portion 33 to facilitate the lateral movement of the connecting portion 33 in the gap, thereby avoiding tearing of the diaphragm assembly 3 caused by excessive single-point deformation of the diaphragm assembly 3.

[0080] In some embodiments, a groove portion 35 protruding toward one side of the end cover 4 is provided on the surface of the diaphragm assembly 3, and the length direction of the groove portion 35 is consistent with the length direction of the second protrusion portion 32 and / or the first protrusion portion 31;

[0081] The groove portion 35 and the first protrusion portion 31 are located on both sides of the second protrusion portion 32 .

[0082] like Figure 3 and Figure 4 As shown, by providing a groove portion 35 in the diaphragm assembly 3, a deformation margin is provided for the radial deformation of the diaphragm assembly 3, thereby reducing the tensile deformation of the diaphragm assembly 3, and thus extending the service life of the diaphragm assembly 3;

[0083] At the same time, the second protrusion 32 is more likely to be deformed than the first protrusion 31, so the groove 35 is arranged on one side of the second protrusion 32, which can significantly improve the utilization rate of the deformation margin;

[0084] Providing the groove portion 35 at a position away from the first protrusion portion 31 helps the first protrusion portion 31 to deform synchronously with the second protrusion portion 32 when it is deformed, thereby reducing the relative deformation between the first protrusion portion 31 and the second protrusion portion 32, reducing material fatigue of the diaphragm assembly 3, and thereby increasing the service life of the diaphragm assembly 3.

[0085] In some embodiments, a plurality of groups of first positioning columns 34 and second positioning columns 38 are vertically arranged on both side surfaces of the diaphragm assembly 3, a first positioning hole 46 for the first positioning column 34 to be inserted is arranged on the inner wall surface of the end cover 4, and a second positioning hole 52 for the second positioning column 38 to be inserted is arranged on the side wall of the protective assembly 5 close to the diaphragm assembly 3.

[0086] like Figure 4 , Figure 5 and Figure 6 Positioning columns are respectively arranged on the end faces of both sides of the diaphragm assembly 3, and positioning holes are arranged at corresponding positions of the end cover 4 and the protective assembly 5. During assembly, the positioning columns are inserted into the positioning holes for positioning, thereby effectively ensuring that the relative positions of the diaphragm assembly 3, the end cover 4 and the protective assembly 5 are correct.

[0087] Among them, the positioning column is preferably set at the position of the connecting part 33, and the positioning hole is preferably set on the surface of the end cover rib 44 or the protective rib 54, avoiding the surface of the diaphragm assembly 3 that needs to be deformed to avoid affecting the sensitivity of the pressure difference regulation.

[0088] In some embodiments, the exhaust hole 43 is arranged at the maximum rotation radius of the intermediate cavity 2. Therefore, when the wheel hub rotates at high speed, impurities inside the intermediate cavity 2 can be gathered at the maximum rotation radius position of the intermediate cavity 2 under the action of centrifugal force, and then discharged through the exhaust hole 43, thereby avoiding blockage of the exhaust hole 43 and avoiding dynamic balance problems of the wheel hub caused by the presence of debris in the intermediate cavity 2.

[0089] Moreover, if Figure 7 As shown, an outer sealing ring protrusion 41 and an inner sealing ring protrusion 42 are provided on the inner wall of the end cover 4, and the inner wall of the end cover 4, the outer sealing ring protrusion 41, the inner sealing ring protrusion 42 and the diaphragm assembly 3 together constitute the intermediate cavity 2, and the outer ring edge and the inner ring edge of the diaphragm assembly 3 are respectively abutted against the end faces of the outer sealing ring protrusion 41 and the inner sealing ring protrusion 42, and the threaded hole 47 for fixing the screw 53 is provided on the end faces of the outer sealing ring protrusion 41 and the inner sealing ring protrusion 42;

[0090] At the same time, the end cover rib 44 divides the middle cavity 2 into a plurality of small cavities, and the exhaust hole 43 is arranged at the intersection of the inner wall of the annular protrusion with a larger diameter and the side wall of the end cover rib 44;

[0091] When the wheel hub Figure 8When rotating at high speed in the direction indicated by the middle arrow, the debris in the middle cavity 2 is blocked by the end cover rib 44 and cannot flow between different small cavities. The debris in the small cavity will gather at the intersection of the inner wall of the outer sealing ring protrusion 41 and the side wall of the end cover rib 44 under the action of centrifugal force. Therefore, the exhaust hole 43 is set here to help quickly discharge the debris in the middle cavity 2 to the external environment, thereby avoiding the debris in the middle cavity 2 from affecting the dynamic balance of the wheel hub.

[0092] In some embodiments, the inner port of the exhaust hole 43 is in communication with the intermediate cavity 2, and the outer port is in communication with the external environment of the hub;

[0093] The inner port of the exhaust hole 43 is connected to the position of the maximum rotation radius of the intermediate cavity 2;

[0094] The maximum turning radius of the outer port of the exhaust hole 43 is not less than the maximum turning radius of the inner port.

[0095] like Fig. 9 and Fig.10 As shown, the rotation radius of the inner port of the exhaust hole 43 is smaller than the rotation radius of the outer port. Therefore, when the wheel hub rotates at high speed, the debris in the exhaust hole 43 can be discharged from the exhaust hole 43 under the action of centrifugal force, effectively avoiding the blockage of the exhaust hole 43.

[0096] When arranging the exhaust holes 43, it is preferred that the center line of the exhaust hole 43 is perpendicular to the axis of the hub or has a non-zero angle with the axis of the hub.

[0097] In some embodiments, the exhaust hole 43 is a long channel, and a center line of the exhaust hole 43 has a non-zero angle with the axis of the hub;

[0098] The long channel includes a plurality of interconnected sub-channels, and there are different non-zero angles between the center lines of different sub-channels and the axis of the hub.

[0099] like Fig.11 As shown, a plurality of groups of sub-channels are arranged in the exhaust hole 43 in the form of a long channel. Due to the different angles between the sub-channels and the axis of the hub, there are bends at the connecting positions of different sub-channels. When debris from the external environment enters through the exhaust hole 43, it will be stuck at the bend. When the hub rotates, the centrifugal force can discharge the debris from the exhaust hole 43, thereby reducing the probability of debris from the external environment entering the intermediate cavity 2.

[0100] like Fig.11As shown, the exhaust hole 43 adopts a structural design of two sub-channels, the center line of the sub-channel close to the outer port of the exhaust hole 43 and the axis of the hub include an angle of α1, and the center line of the sub-channel close to the inner port of the exhaust hole 43 and the axis of the hub include an angle of α2, α1>α2, so the sub-channel close to the outer port has a larger inclination angle, when debris enters from the outside, when it reaches the bending position, the resistance increases, thereby slowing down the entry speed, or directly getting stuck at the bending position, and when the debris is discharged from the inside, after passing the bending position, the centrifugal force and acceleration both increase, so that the debris can be quickly discharged.

[0101] In some embodiments, the exhaust hole 43 is a long channel, and the inner diameter of the exhaust hole 43 gradually decreases from the inner port to the outer port.

[0102] like Fig.12 As shown, the inner diameter of the inner port of the exhaust hole 43 is larger than the inner diameter of the outer port, so it is helpful to discharge the debris in the middle cavity 2 and reduce the probability of the debris in the external environment entering the exhaust hole 43.

[0103] In some embodiments, the exhaust hole 43 is arranged on the end cover 4 at one end of the hub, and a thickened water blocking cap 45 is arranged on the surface of the end cover 4 close to the external environment at a position corresponding to the exhaust hole 43, and the outer port of the exhaust hole 43 is arranged on the side surface of the water blocking cap 45 away from the hub axis position.

[0104] like Figure 1 and Fig.10 As shown, a thickened water blocking cap 45 is provided on the end cover 4, which can increase the thickness of the end cover 4 at the corresponding position, meet the channel length requirement of the exhaust hole 43, and can set a non-zero angle between the center line of the exhaust hole 43 and the axis of the hub, thereby avoiding increasing the thickness of other positions of the end cover 4, which is conducive to realizing a lightweight design of the hub;

[0105] Moreover, setting the outer port of the exhaust hole 43 on the side surface of the water blocking cap 45 away from the axis of the hub helps to avoid the center line of the outer port of the exhaust hole 43 being coaxial with the rotation tangent of the hub, thereby preventing airflow or debris from the external environment from entering the exhaust hole 43 when the hub rotates at high speed, thereby preventing the pressure balance between the intermediate cavity 2 and the external environment from being destroyed.

[0106] In addition to the hub motors disclosed in the above embodiments, the present invention also provides a vehicle including the above hub motor. For the structures of other parts of the vehicle, please refer to the prior art and will not be described in detail herein.

[0107] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0108] The above is a detailed introduction to the wheel hub motor and vehicle provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hub motor, characterized in that: include: Wheel hub; A diaphragm assembly (3) is arranged in the internal cavity (1) of the wheel hub and together with the inner wall of the end cover (4) of the wheel hub, forms an intermediate cavity (2); the diaphragm assembly (3) is an elastic diaphragm, and the end cover (4) is provided with an exhaust hole (43) communicating with the intermediate cavity (2) and the external environment of the wheel hub; The diaphragm assembly (3) is recessed toward a side away from the end cover (4) to form a plurality of small air chambers, and all of the small air chambers together constitute the intermediate cavity (2).

2. The wheel hub motor according to claim 1, characterized in that: A protective component (5) is provided on one side of the diaphragm component (3) close to the internal cavity (1), and the edge of the protective component (5) presses and seals the edge of the diaphragm component (3) to the inner wall of the end cover (4); A transition cavity (6) is provided between the protection component (5) and the diaphragm component (3), and a vent hole (51) communicating between the transition cavity (6) and the internal cavity (1) is provided in the protection component (5).

3. The wheel hub motor according to claim 2, characterized in that: The surface of the diaphragm assembly (3) is provided with a first protrusion (31) and a second protrusion (32) which are recessed toward a side away from the end cover (4); the outer surface of the first protrusion (31) abuts against the end surface of the protective assembly (5); and the outer surface of the second protrusion (32) and the protective assembly (5) form the transition cavity (6).

4. The wheel hub motor according to claim 3, characterized in that: The diaphragm assembly (3) is an annular structure, and the first protrusion (31) and the second protrusion (32) are both annular structures with successively increasing gyration radii.

5. The wheel hub motor according to claim 4, characterized in that: A plurality of radially arranged connecting portions (33) are provided in the diaphragm assembly (3), and the connecting portions (33) cut the first protruding portion (31) and the second protruding portion (32) into a plurality of groups of fan-shaped areas.

6. The wheel hub motor according to claim 5, characterized in that: A plurality of end cover ribs (44) are provided on one side of the end cover (4) close to the diaphragm assembly (3), and a plurality of protective ribs (54) are provided on one side of the protective assembly (5) close to the diaphragm assembly (3). The positions of the protective ribs (54) and the end cover ribs (44) correspond one to one. The connecting portion (33) is provided in a gap between the protective ribs (54) and the end cover ribs (44), and the width of the gap is not less than the thickness of the connecting portion (33), so as to enable the connecting portion (33) to move laterally in the gap.

7. The wheel hub motor according to any one of claims 3 to 6, characterized in that: The surface of the diaphragm assembly (3) is provided with a groove portion (35) protruding toward one side of the end cover (4), and the length direction of the groove portion (35) is consistent with the length direction of the second protruding portion (32) and / or the first protruding portion (31); Furthermore, the groove portion (35) and the first protruding portion (31) are located on both sides of the second protruding portion (32).

8. The wheel hub motor according to any one of claims 1 to 6, characterized in that: A plurality of groups of first positioning columns (34) and second positioning columns (38) are respectively vertically arranged on both side surfaces of the diaphragm assembly (3), a first positioning hole (46) for the first positioning column (34) to be inserted is arranged on the inner wall surface of the end cover (4), and a second positioning hole (52) for the second positioning column (38) to be inserted is arranged on a side wall of the protective assembly (5) close to the diaphragm assembly (3).

9. A vehicle, characterized in that: The invention comprises the hub motor as described in any one of claims 1 to 8.

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