Hub and vehicle

Abstract

The utility model discloses a wheel hub and a vehicle, and relates to the technical field of wheel hub motors, in particular to the wheel hub and the vehicle, comprising a middle cavity arranged in an internal cavity of the wheel hub and separated and sealed from the internal cavity through an elastic diaphragm assembly; according to the hub and the vehicle, the middle cavity is isolated in the inner cavity of the hub through the elastic diaphragm assembly, the middle cavity is directly communicated with the external space, pressure balance is achieved between the inner cavity and the middle cavity as well as between the inner cavity and the external space through elastic deformation of the diaphragm assembly, and under the action of the diaphragm assembly, pressure balance is achieved. The inner cavity is not directly communicated with the external space, water is effectively prevented from entering the motor, the exhaust hole is formed in the position of the maximum turning radius of the middle cavity, impurities in the middle cavity can be discharged through the exhaust hole by means of centrifugal force generated when the hub rotates, the exhaust hole is prevented from being blocked, and then air pressure balance inside and outside the hub is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, and more specifically, to a hub. Furthermore, this utility model also relates to a vehicle including the aforementioned hub. Background Technology

[0002] As the driving component of electric vehicles, hub motors generate heat during operation. Hub motors have internal cavities, and the rotor and stator of the motor are located in these cavities. When the motor rotates, the heat generated will create a large positive pressure in the internal cavity, resulting in a large pressure difference with the external space of the hub motor. This can easily damage the internal sealing structure of the motor, such as the end cover sealant, oil seal, and other shaft seals.

[0003] Furthermore, when a hub motor is submerged in water, the external liquid rapidly cools the motor, creating a significant pressure difference between the inside and outside of the motor, which further accelerates the service life of weak sealing points.

[0004] In existing technologies, a common approach is to drill a hole in the main shaft and install a flexible hose and a check valve in the hole to achieve pressure balance between the inside and outside of the hub motor. This method relies heavily on the lifespan of the check valve and hose; once the hose ages and breaks, the pressure difference is lost, and water can easily enter the hub. Furthermore, this method is prone to clogging, resulting in poor performance. On the other hand, this method causes excessively fast pressure transmission, leading to rapid heat dissipation from the hub, which is detrimental to maintaining the hub motor within a high output temperature range.

[0005] In summary, how to solve the problems of pressure balance in the inner and outer spaces of the hub motor and water ingress and blockage of the exhaust port is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a wheel hub that uses an elastic diaphragm assembly to isolate an intermediate cavity within the internal cavity of the wheel hub, while allowing the intermediate cavity to be directly connected to the external space. Through the elastic deformation of the diaphragm assembly, the internal cavity, the intermediate cavity, and the external space achieve pressure balance. Furthermore, under the action of the diaphragm assembly, the internal cavity is not directly connected to the external space, effectively preventing water from entering the motor. Moreover, the vent is located at the maximum turning radius of the intermediate cavity, which can use the centrifugal force when the wheel hub rotates to discharge debris in the intermediate cavity through the vent, preventing the vent from being blocked, thereby ensuring the air pressure balance inside and outside the wheel hub.

[0007] Another objective of this invention is to provide a vehicle that includes the aforementioned wheel hub, has the same technical features, and can solve the same technical problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A wheel hub, comprising:

[0010] An intermediate cavity is disposed in the internal cavity of the wheel hub, and the intermediate cavity is separated and sealed from the internal cavity by an elastic diaphragm assembly;

[0011] An exhaust port is provided on the housing of the wheel hub, and the exhaust port connects the intermediate cavity and the external environment of the wheel hub;

[0012] The exhaust port is located at the maximum gyration radius of the intermediate cavity.

[0013] Preferably, the intermediate cavity is an annular cavity, and the centerline of the intermediate cavity overlaps with the axis of the hub spindle;

[0014] The annular inner diameter of the intermediate cavity is larger than the outer diameter of the hub spindle.

[0015] Preferably, the end cap surface at one end of the hub is provided with two sets of annular protrusions, and the center lines of the annular protrusions overlap with the axis of the hub. The diaphragm assembly, together with the two sets of annular protrusions and the inner wall of the end cap between the two sets of annular protrusions, forms an intermediate cavity.

[0016] The inner diameter of the annular protrusion with a smaller diameter is larger than the outer diameter of the hub spindle.

[0017] The vent is located at the root of the inner wall of the larger diameter annular protrusion.

[0018] Preferably, the inner wall of the end cap is provided with a plurality of radial end cap ribs evenly arranged in the axial direction, and the end cap ribs divide the intermediate cavity into a plurality of small cavities.

[0019] The vent is located at the intersection of the inner wall of the larger diameter annular protrusion and the side wall of the end cap rib.

[0020] Preferably, the inner port of the exhaust port is connected to the intermediate cavity, and the outer port is connected to the external environment of the wheel hub;

[0021] The inner port of the exhaust port is connected to the position of the maximum gyration radius of the intermediate cavity;

[0022] The maximum gyration radius of the outer port of the exhaust port is not less than the maximum gyration radius of the inner port.

[0023] Preferably, the exhaust port is a long channel, and the centerline of the exhaust port has a non-zero angle with the axis of the wheel hub;

[0024] The long channel includes several interconnected sub-channels, and the centerlines of different sub-channels have non-zero included angles with the axis of the wheel hub.

[0025] The centerline of the sub-channel near the outer port of the exhaust port forms an angle α1 with the axis of the wheel hub, and the centerline of the sub-channel near the inner port of the exhaust port forms an angle α2 with the axis of the wheel hub, where α1 > α2.

[0026] Preferably, the exhaust port is a long channel, and the inner diameter of the exhaust port gradually decreases from the inner port to the outer port.

[0027] Preferably, the vent is located on an end cap at one end of the wheel hub, and a thickened water-blocking cap is provided on the outer surface of the end cap at a position corresponding to the vent. The outer port of the vent is located on the side surface of the water-blocking cap away from the wheel hub axis.

[0028] A vehicle comprising the wheel hub described in any one of the foregoing.

[0029] The wheel hub provided by this utility model has at least the following advantages compared with the prior art:

[0030] 1. An elastic diaphragm assembly separates the internal cavity of the wheel hub from the external environment. When the pressure in the internal cavity changes, the elastic deformation of the diaphragm assembly can change the effective volume ratio between the internal cavity and the intermediate cavity. The intermediate cavity is connected to the external environment through an exhaust port, thereby achieving pressure balance between the internal cavity and the external environment. This also prevents dust and moisture from the external environment from directly entering the internal cavity, reducing the impact on the wheel hub motor.

[0031] 2. At the same time, the exhaust port connecting the intermediate cavity and the external environment is set at the maximum gyration radius of the intermediate cavity. When the wheel hub rotates, the debris in the intermediate cavity can be gathered to the maximum gyration radius position under the action of centrifugal force, and then discharged from the intermediate cavity through the exhaust port, avoiding the debris from blocking the exhaust port, thereby ensuring the pressure balance inside and outside the wheel hub.

[0032] 3. When the diaphragm assembly deforms, it requires a certain driving force, that is, it needs to have a certain pressure difference between the internal cavity pressure and the external pressure, thereby slowing down the heat dissipation speed in the hub, which helps to keep the motor in the high-efficiency output temperature range, thereby improving the output efficiency of the motor.

[0033] The vehicle provided by this utility model includes the aforementioned wheel hub and has the same beneficial effects. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the specific wheel hub provided by this utility model;

[0036] Figure 2 A cross-sectional view of the wheel hub provided by this utility model;

[0037] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0038] Figure 4 This is a schematic diagram of the end cap provided by this utility model near the diaphragm assembly.

[0039] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0040] Figure 6 A cross-sectional view of the end cap provided by this utility model;

[0041] Figure 7 for Figure 6 Enlarged view at point C;

[0042] Figure 8 for Figure 6 Enlarged view of the second embodiment at point C;

[0043] Figure 9 for Figure 6 Enlarged view of the third embodiment at point C.

[0044] In the picture:

[0045] 1. Internal cavity; 2. Intermediate cavity; 3. Diaphragm assembly; 4. End cap; 41. Outer sealing ring protrusion; 42. Inner sealing ring protrusion; 43. Vent hole; 44. End cap rib; 45. Water-blocking cap;

[0046] Figure 5 The direction of the middle arrow indicates the rotation direction of the hub during operation. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] The core of this invention is to provide a wheel hub that uses an elastic diaphragm assembly to isolate an intermediate cavity within the hub's internal cavity, allowing the intermediate cavity to be directly connected to the external space. Through the elastic deformation of the diaphragm assembly, the internal cavity, the intermediate cavity, and the external space achieve pressure balance. Furthermore, the diaphragm assembly prevents the internal cavity from directly connecting to the external space, effectively preventing water from entering the motor. The vent is located at the maximum gyration radius of the intermediate cavity, allowing the centrifugal force during hub rotation to expel debris from the intermediate cavity through the vent, preventing blockage and ensuring pressure balance inside and outside the hub.

[0049] Another core aspect of this utility model is to provide a vehicle that includes the aforementioned wheel hub, has the same technical features, and can solve the same technical problems.

[0050] Please refer to Figure 1 and Figure 2 ,include:

[0051] The intermediate cavity 2 is located in the internal cavity 1 of the wheel hub, and the intermediate cavity 2 is separated and sealed from the internal cavity 1 by an elastic diaphragm assembly 3.

[0052] The exhaust port 43 is located on the housing of the wheel hub and connects the intermediate cavity 2 with the external environment of the wheel hub.

[0053] The exhaust port 43 is located at the maximum gyration radius of the intermediate cavity 2.

[0054] like Figure 1 and Figure 2 As shown, an independent intermediate cavity 2 is separated in the internal cavity 1 of the hub by an elastic diaphragm assembly 3. When the motor temperature changes and causes the pressure in the internal cavity 1 to change, the diaphragm assembly 3 can be forced to undergo elastic deformation to change the effective volume ratio between the internal cavity 1 and the intermediate cavity 2. The intermediate cavity 2 is directly connected to the external environment through the exhaust port 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.

[0055] Moreover, the internal cavity 1 is isolated from the intermediate cavity 2 and the external environment by the diaphragm assembly 3, which effectively prevents dust and rainwater from entering the internal cavity 1 of the hub, avoids corrosion of the motor, and effectively extends the service life of the motor.

[0056] Meanwhile, by placing the intermediate cavity 2 in the internal cavity 1, the diaphragm assembly 3 can be located inside the wheel hub housing, which helps to slow down the aging rate of the diaphragm assembly 3. Furthermore, the diaphragm assembly 3 has a large force-bearing area on both sides, which can quickly respond to pressure changes in the internal cavity 1 and sensitively regulate the pressure difference between the inside and outside of the wheel hub.

[0057] Since the diaphragm assembly 3 is an elastic element, a certain pressure difference is required on both sides to drive its deformation and maintain its deformed posture. This allows a certain pressure difference to exist between the internal cavity 1 and the external environment, thereby slowing down the heat dissipation rate of the internal cavity 1, keeping the motor in the temperature range of high-efficiency output, and thus improving the output efficiency of the motor.

[0058] Furthermore, the exhaust port 43, which connects the intermediate cavity 2 to the external environment, is located at the maximum gyration radius of the intermediate cavity 2. Therefore, when the wheel hub rotates at high speed, impurities inside the intermediate cavity 2 can be concentrated at the maximum gyration radius of the intermediate cavity 2 under the action of centrifugal force, and then discharged through the exhaust port 43, thus avoiding blockage of the exhaust port 43 and avoiding wheel hub dynamic balance problems caused by impurities inside the intermediate cavity 2.

[0059] In some embodiments, the intermediate cavity 2 is an annular cavity, and the centerline of the intermediate cavity 2 overlaps with the axis of the hub spindle.

[0060] The annular inner diameter of the intermediate cavity 2 is larger than the outer diameter of the hub spindle.

[0061] like Figure 2 As shown, the intermediate cavity 2 adopts a ring structure, and its inner diameter is larger than the outer diameter of the hub's main shaft, which effectively avoids interference between the intermediate cavity 2 and the main shaft. Furthermore, the use of a ring-shaped intermediate cavity 2 helps to achieve dynamic balance of the hub.

[0062] In some embodiments, the same effect can be achieved by arranging several independent intermediate cavities 2 in a ring array along the hub axis in the internal cavity 1, which also falls within the protection scope of this application.

[0063] In some embodiments, the end cap 4 at one end of the hub is provided with two sets of annular protrusions, and the center lines of the annular protrusions overlap with the axis of the hub. The diaphragm assembly 3, together with the two sets of annular protrusions and the inner wall of the end cap 4 between the two sets of annular protrusions, forms an intermediate cavity 2.

[0064] The inner diameter of the smaller annular protrusion is larger than the outer diameter of the hub spindle.

[0065] The vent 43 is located at the root of the inner wall of the larger diameter annular protrusion.

[0066] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the outer sealing ring protrusion 41 and the inner sealing ring protrusion 42, which are coaxially arranged on the inner wall of the end cap 4, together with the diaphragm assembly 3 and the inner wall of the end cap 4, form an intermediate cavity 2. Therefore, the intermediate cavity 2 is set in the inner cavity 1, and the diaphragm assembly 3 can obtain a large contact area with both the intermediate cavity 2 and the inner cavity 1, which helps to improve the sensitivity of pressure regulation. Moreover, the annular protrusion is entirely located in the inner cavity 1, so the diaphragm assembly 3 is wrapped by the end cap 4 and the hub, which helps to prevent damage to the diaphragm assembly 3 from external substances and improve its service life.

[0067] Moreover, the inner wall of the outer sealing ring protrusion 41 is the position of the maximum rotation radius of the intermediate cavity 2. Therefore, by setting the vent 43 at the root of the outer sealing ring protrusion 41, centrifugal force can be used to discharge the debris in the intermediate cavity 2 through the vent 43.

[0068] Moreover, the outer wall of the inner sealing ring protrusion 42 is the position of the minimum inner diameter of the intermediate cavity 2. Therefore, the inner diameter of the outer wall of the inner sealing ring protrusion 42 is greater than the outer diameter of the main shaft, which can avoid interference between the intermediate cavity 2 and the main shaft.

[0069] In some embodiments, the inner wall of the end cap 4 is axially uniformly provided with a number of radial end cap ribs 44, which divide the intermediate cavity 2 into a number of small cavities.

[0070] The vent 43 is located at the intersection of the inner wall of the larger diameter annular protrusion and the side wall of the end cap rib 44.

[0071] like Figure 4 and Figure 5 As shown, the end cap 4 has several sets of radial end cap ribs 44 arranged along the axial direction on its surface, dividing the annular intermediate cavity 2 into several sets of small cavities. That is, through the separation by the end cap ribs 44, debris inside the intermediate cavity 2 is blocked and cannot flow between different small cavities. When the hub... Figure 5 When rotating in the direction indicated by the middle arrow, the debris in the small cavity will converge 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 to quickly discharge the debris in the intermediate cavity 2 to the external environment and avoid the debris in the intermediate cavity 2 from affecting the dynamic balance of the wheel hub.

[0072] In some embodiments, the inner port of the exhaust port 43 is connected to the intermediate cavity 2, and the outer port is connected to the external environment of the hub.

[0073] The inner port of the exhaust port 43 is connected to the position of the maximum radius of rotation of the intermediate cavity 2;

[0074] The maximum gyration radius of the outer port of the exhaust port 43 is not less than the maximum gyration radius of the inner port.

[0075] like Figure 6 and Figure 7 As shown, the radius of rotation of the inner port of the exhaust port 43 is smaller than that of the outer port. Therefore, when the wheel hub rotates at high speed, the debris inside the exhaust port 43 can be discharged from the exhaust port 43 under the action of centrifugal force, effectively avoiding the blockage of the exhaust port 43.

[0076] When arranging the exhaust port 43, it is preferable that the center line of the exhaust port 43 is perpendicular to the axis of the wheel hub or has a non-zero angle with the axis of the wheel hub.

[0077] In some embodiments, the exhaust port 43 is a long channel, and the centerline of the exhaust port 43 has a non-zero angle with the axis of the wheel hub;

[0078] The long channel includes several interconnected sub-channels, and the centerlines of different sub-channels have non-zero angles with the axis of the wheel hub.

[0079] like Figure 8 As shown, the exhaust port 43 in the form of a long channel is provided with several sets of sub-channels. Since there are different included angles between the sub-channels and the axis of the wheel hub, there are bends at the connection positions of different sub-channels. When debris from the external environment enters through the exhaust port 43, it will be stuck at the bend position. When the wheel hub rotates, the centrifugal force can discharge the debris from the exhaust port 43, thereby reducing the probability of debris from the external environment entering the intermediate cavity 2.

[0080] like Figure 8 As shown, the exhaust port 43 adopts a structure design with two sub-channels. The center line of the sub-channel near the outer port of the exhaust port 43 makes an angle of α1 with the axis of the wheel hub, and the center line of the sub-channel near the inner port of the exhaust port 43 makes an angle of α2 with the axis of the wheel hub. Since α1 > α2, the sub-channel near the outer port has a larger inclination angle. When debris enters from the outside, the resistance increases when it reaches the bend position, which slows down the speed of entry or directly gets stuck at the bend position. When debris is discharged from the inside, after passing through the bend position, the centrifugal force and acceleration both increase, which can quickly discharge the debris.

[0081] In some embodiments, the vent 43 is a long channel, and the inner diameter of the vent 43 gradually decreases from the inner port to the outer port.

[0082] like Figure 9 As shown, the inner diameter of the inner port of the exhaust port 43 is larger than the inner diameter of the outer port, which helps to discharge debris from the intermediate cavity 2 and reduces the probability of debris from the external environment entering the exhaust port 43.

[0083] In some embodiments, the exhaust port 43 is disposed on the end cap 4 at one end of the wheel hub, and a thickened water-blocking cap 45 is disposed on the surface of the end cap 4 near the external environment at a position corresponding to the exhaust port 43, and the outer port of the exhaust port 43 is disposed on the surface of the water-blocking cap 45 away from the wheel hub axis.

[0084] like Figure 1 and Figure 7 As shown, a thickened water-blocking cap 45 is provided on the end cap 4, which can increase the thickness of the end cap 4 at the corresponding position, meet the channel length requirements of the exhaust port 43, and enable the center line of the exhaust port 43 to be set with a non-zero angle with the axis of the wheel hub, thereby avoiding the increase of the thickness of other positions of the end cap 4, which helps to achieve the lightweight design of the wheel hub.

[0085] Furthermore, placing the outer port of the exhaust port 43 on the side surface of the water-blocking cap 45 away from the wheel hub axis helps to prevent the center line of the outer port of the exhaust port 43 from being coaxial with the rotation tangent of the wheel hub, thereby preventing airflow or debris from the external environment from entering the exhaust port 43 when the wheel hub rotates at high speed, and thus preventing the pressure balance between the intermediate cavity 2 and the external environment from being disrupted.

[0086] In addition to the wheel hubs disclosed in the above embodiments, this utility model also provides a vehicle including the above-mentioned wheel hubs. For the structure of other parts of the vehicle, please refer to the prior art, which will not be described in detail here.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The wheel hub and vehicle provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A wheel hub, characterized in that, include: An intermediate cavity (2) is disposed in the internal cavity (1) of the hub, and the intermediate cavity (2) is separated and sealed from the internal cavity (1) by an elastic diaphragm assembly (3); An exhaust port (43) is provided on the housing of the hub, and the exhaust port (43) connects the intermediate cavity (2) and the external environment of the hub; The exhaust port (43) is located at the maximum radius of rotation of the intermediate cavity (2).

2. The wheel hub according to claim 1, characterized in that, The intermediate cavity (2) is an annular cavity, and the center line of the intermediate cavity (2) overlaps with the axis of the hub main shaft; The annular inner diameter of the intermediate cavity (2) is larger than the outer diameter of the hub spindle.

3. The wheel hub of claim 2, wherein, The end cap (4) at one end of the hub is provided with two sets of annular protrusions, and the center lines of the annular protrusions overlap with the axis of the hub. The diaphragm assembly (3), together with the two sets of annular protrusions and the inner wall of the end cap (4) between the two sets of annular protrusions, forms an intermediate cavity (2). The inner diameter of the annular protrusion with a smaller diameter is larger than the outer diameter of the hub spindle. The vent (43) is located at the root of the inner wall of the larger diameter annular protrusion.

4. The wheel hub of claim 3, wherein, The inner wall of the end cap (4) is axially uniformly provided with several sets of radial end cap ribs (44), which divide the intermediate cavity (2) into several sets of small cavities. The vent (43) is located at the intersection of the inner wall of the large-diameter annular protrusion and the side wall of the end cap rib (44).

5. The wheel hub according to any one of claims 1-4, characterized in that, The inner port of the exhaust port (43) is connected to the intermediate cavity (2), and the outer port is connected to the external environment of the hub; The inner port of the exhaust port (43) is connected to the position of the maximum radius of rotation of the intermediate cavity (2); The maximum gyration radius of the outer port of the exhaust port (43) is not less than the maximum gyration radius of the inner port.

6. The wheel hub of claim 5, wherein, The exhaust port (43) is a long channel, and the center line of the exhaust port (43) has a non-zero angle with the axis of the wheel hub; The long channel includes several interconnected sub-channels, and the centerlines of different sub-channels have non-zero included angles with the axis of the wheel hub.

7. The wheel hub according to claim 5, characterized in that, The exhaust port (43) is a long channel, and the inner diameter of the exhaust port (43) gradually decreases from the inner port to the outer port.

8. The wheel hub of claim 5, wherein, The exhaust hole (43) is provided on the end cap (4) at one end of the wheel hub, and a thickened water-blocking cap (45) is provided on the outer surface of the end cap (4) at the position corresponding to the exhaust hole (43). The outer port of the exhaust hole (43) is provided on the side surface of the water-blocking cap (45) away from the wheel hub axis.

9. A vehicle characterized by comprising: Includes the wheel hub according to any one of claims 1-8.

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