Hub assembly and vehicle

Abstract

The utility model discloses a hub assembly and a vehicle, and relates to the technical field of hub motors, the hub assembly comprises a first support shaft; a sealing cavity is formed in the hub body, and one end of the first supporting shaft extends into the sealing cavity and is rotationally connected with the hub body; the motor assembly is arranged in the sealing cavity, and the motor fixing end is connected with the vehicle body; the hub body is in transmission connection with the output end of the motor through the speed reduction assembly. The sealing assembly is arranged in the sealing cavity, the sealing assembly is arranged on the periphery of the first supporting shaft, the sealing assembly comprises a first mounting base, a second mounting base and a pushing structure, the first mounting base is rotationally connected with the second mounting base, the first mounting base is in interference fit with the first supporting shaft, and the second mounting base is fixedly connected with the inner wall of the hub body; and the pushing structure enables the first mounting seat to be tightly pressed on the second mounting seat. According to the technical scheme, moisture, dust and other external impurities cannot enter the sealing cavity, and the overall sealing effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub motors, in particular to a wheel hub assembly and a vehicle. Background Art

[0002] The hub motor is a structure that integrates the power unit, transmission unit and braking unit into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. Due to the harsh working environment of the hub motor, it is easily affected by external substances such as moisture and dust during use, causing failure or damage. Utility Model Content

[0003] The main purpose of the utility model is to provide a wheel hub assembly and a vehicle, aiming to solve the problem that moisture or dust easily enters the wheel hub motor.

[0004] In order to achieve the above-mentioned purpose, the wheel hub assembly proposed by the utility model is installed on a vehicle body, and the wheel hub assembly includes:

[0005] A first support shaft, used to connect with the vehicle body;

[0006] A hub body, wherein a sealed cavity is formed inside the hub body, and one end of the first support shaft extends into the sealed cavity and is rotatably connected to the hub body;

[0007] A motor assembly is disposed in the sealed cavity, the motor having a fixed end and an output end, the fixed end being connected to the vehicle body;

[0008] A reduction assembly is disposed in the sealing cavity, the hub body and the output end are connected in transmission via the reduction assembly, and the motor assembly drives the hub body to rotate via the reduction assembly;

[0009] A sealing assembly is arranged in the sealing cavity, and the sealing assembly is arranged on the outer periphery of the first support shaft. The sealing assembly includes a first mounting seat, a second mounting seat and a pushing structure. The first mounting seat is rotatably connected to the second mounting seat. The first mounting seat is sleeved on the outside of the first support shaft and has an interference fit with the first support shaft. The second mounting seat is fixedly connected to the inner wall of the hub body and rotates with the hub body. The pushing structure is drivingly connected to the first mounting seat so that the first mounting seat is tightly pressed against the second mounting seat.

[0010] In one embodiment, the pushing structure includes a third mounting seat and an elastic member, the third mounting seat and the elastic member are sleeved on the outer periphery of the first support shaft, and the third mounting seat is arranged on a side of the first mounting seat away from the second mounting seat, and the elastic member elastically connects the third mounting seat and the first mounting seat.

[0011] In one embodiment, the deceleration assembly includes:

[0012] A first-stage deceleration structure disposed in the sealing cavity and drivingly connected to the output end;

[0013] A second-stage deceleration structure disposed in the sealing cavity, and the first-stage deceleration structure is drivingly connected to the hub body through the second-stage deceleration structure.

[0014] In one embodiment, the first-stage deceleration structure includes:

[0015] A first sun gear connected to the output end;

[0016] A ring gear disposed on the outer periphery of the first sun gear and connected to the fixed end;

[0017] A first planet gear disposed between the first sun gear and the ring gear, and the first planet gear meshes and drives with the first sun gear and the ring gear respectively;

[0018] A first planet carrier, the first planet gear is rotatably disposed on the first planet carrier, and the first planet carrier is drivingly connected to the second-stage deceleration structure.

[0019] In one embodiment, the second-stage deceleration structure includes:

[0020] A second sun gear coaxially arranged with the first sun gear, and the first planet carrier is connected to the second sun gear;

[0021] A second planet gear disposed between the ring gear and the second sun gear and meshing with the second sun gear and the ring gear respectively;

[0022] A second planet carrier, the second planet gear is rotatably disposed on the second planet carrier, and the second planet carrier is fixedly connected to the hub body.

[0023] In one embodiment, the hub body includes a first end cover and a second end cover, the first end cover and the second end cover enclose a sealing cavity, a through hole is provided at one end of the second end cover away from the first end cover, and the end of the second end cover provided with the through hole is close to the outer side of the vehicle body, and the first support shaft passes through the through hole outward from the sealing cavity and is connected to the vehicle body.

[0024] In one embodiment, the hub assembly further includes a sealing ring, and the sealing ring seals and connects the first end cover and the second end cover.

[0025] In one embodiment, a through groove is provided on a side of the first end cap away from the second end cap. The hub assembly further includes a second support shaft. One end of the second support shaft is connected to the vehicle body, and the other end penetrates through the through groove to be connected to the fixed end.

[0026] In one embodiment, the contact surfaces of the first mounting seat and the second mounting seat are both made of ceramic, silicon carbide or carbon graphite.

[0027] The present utility model further provides a vehicle, which includes a vehicle body and a hub assembly. The hub assembly is the hub assembly as described in any one of the above, and the hub assembly is installed on the vehicle body.

[0028] In the technical solution of the present utility model, a motor assembly and a speed reduction assembly are arranged inside the wheel hub body. The motor assembly is drivingly connected to the speed reduction assembly, and the speed reduction assembly is connected to the wheel hub body, so as to realize the rotation of the wheel hub body driven by the motor assembly through the speed reduction assembly. Specifically, the motor assembly is rotatably arranged in a sealed cavity, and the fixed end extends out of the wheel hub body and is fixedly connected to the vehicle body. The output end is connected to the speed reduction assembly, and the driving end of the speed reduction assembly is drivingly connected to the wheel hub body. The speed reduction assembly is convenient for adjusting the output speed of the motor assembly to adjust it to a suitable speed for the vehicle. Moreover, the speed reduction assembly increases the output torque of the motor assembly by adjusting the reduction ratio to better adapt to different loads and facilitate operation in harsh environments. The wheel hub body is connected to the vehicle body through a first support shaft. The first support shaft is fixedly connected to the vehicle body outside the sealed cavity, and the other end is rotatably connected to the speed reduction assembly and the wheel hub body respectively inside the sealed cavity, specifically realizing the rotational connection through bearings. That is, when the motor assembly drives the wheel hub body to rotate, the wheel hub body is installed on the vehicle body through the first support shaft, so that the wheel hub body can rotate stably on the vehicle body. In addition, a sealing assembly is sleeved on the outer periphery of a part of the first support shaft inside the wheel hub body. The sealing assembly seals the connection between the first support shaft and the wheel hub body, which can prevent external substances such as moisture and dust from entering the sealed cavity and avoid affecting the operation of the motor assembly. Specifically, the sealing assembly includes a first mounting seat and a second mounting seat. Both the first mounting seat and the second mounting seat are annular structures. The first mounting seat is sleeved on the outer periphery of the first support shaft and is in interference fit with the first support shaft. The second mounting seat is sleeved on the outer periphery of the first support shaft and is fixedly connected to the wheel hub body and rotates with the wheel hub body. The opposite surfaces of the first mounting seat and the second mounting seat are in contact. A pushing structure is installed on one side of the first mounting seat facing away from the second mounting seat. The pushing structure applies a pressure to the first mounting seat towards the second mounting seat, so that the first mounting seat and the second mounting seat are closely attached. When the motor assembly drives the wheel hub body to rotate, the first mounting seat and the second mounting seat rotate relative to each other. However, due to the fit between the first mounting seat and the first support shaft, the close attachment of the first mounting seat and the second mounting seat, and the connection between the second mounting seat and the wheel hub body, external impurities such as moisture and dust cannot enter the interior of the motor assembly. That is, the sealing assembly seals the connection between the first support shaft and the wheel hub body, effectively improving the overall sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 is a schematic structural diagram of the wheel hub assembly provided by the present utility model;

[0031] Figure 2 Schematic cross-sectional view of the wheel hub assembly provided by the present utility model;

[0032] Figure 3 Schematic structural view of the speed reduction assembly provided by the present utility model;

[0033] Figure 4 Schematic cross-sectional view of the speed reduction assembly provided by the present utility model;

[0034] Figure 5 is Figure 2 Partial enlarged view at position A in

[0035] Explanation of the reference numerals in the drawings:

[0036] 100, wheel hub body; 110, first end cover; 120, second end cover; 121, through hole;

[0037] 200, first support shaft; 210, second support shaft;

[0038] 300, motor assembly;

[0039] 400, speed reduction assembly; 410, primary speed reduction structure; 411, first sun gear; 412, first planet gear; 413, first planet carrier; 414, ring gear; 420, secondary speed reduction structure; 421, second sun gear; 422, second planet gear; 423, second planet carrier; 430, speed reducer housing;

[0040] 500, sealing assembly; 510, first mounting seat; 520, second mounting seat; 530, third mounting seat; 540, elastic member;

[0041] 600, sealing ring.

[0042] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0043] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0046] The hub motor is a structure that integrates the power unit, transmission unit and braking unit into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. Due to the harsh working environment of the hub motor, it is easily affected by external substances such as moisture and dust during use, causing failure or damage.

[0047] The utility model provides a wheel hub assembly and a vehicle.

[0048] See also Figure 1 , Figure 2 and Figure 5 In one embodiment of the utility model, the wheel hub assembly includes:

[0049] A first support shaft 200, used to connect with the vehicle body;

[0050] The hub body 100 has a sealed cavity formed inside, and one end of the first support shaft 200 extends into the sealed cavity and is rotatably connected to the hub body 100;

[0051] The motor assembly 300 is arranged in the sealed cavity, and the motor has a fixed end and an output end, and the fixed end is connected to the vehicle body;

[0052] The reduction assembly 400 is disposed in the sealed cavity, the hub body 100 is connected to the output end through the reduction assembly 400, and the motor assembly 300 drives the hub body 100 to rotate through the reduction assembly 400;

[0053] The sealing assembly 500 is disposed in the sealing cavity. The sealing assembly 500 is disposed on the outer periphery of the first support shaft 200. The sealing assembly 500 includes a first mounting seat 510, a second mounting seat 520, and a pushing structure. The first mounting seat 510 is rotatably connected to the second mounting seat 520. The first mounting seat 510 is sleeved on the outside of the first support shaft 200 and is in interference fit with the first support shaft 200. The second mounting seat 520 is fixedly connected to the inner wall of the hub body 100 and rotates with the hub body 100. The pushing structure is drivingly connected to the first mounting seat 510 to press the first mounting seat 510 tightly against the second mounting seat 520.

[0054] In the technical solution of the utility model, a motor assembly 300 and a reduction assembly 400 are arranged in the wheel hub body 100, the motor assembly 300 is drivingly connected to the reduction assembly 400, and the reduction assembly 400 is connected to the wheel hub body 100, so that the motor assembly 300 drives the wheel hub body 100 to rotate through the reduction assembly 400. Specifically, the motor assembly 300 is rotatably arranged in the sealed cavity, and the fixed end extends out of the wheel hub body 100 and is fixedly connected to the vehicle body, the output end is connected to the reduction assembly 400, and the driving end of the reduction assembly 400 is drivingly connected to the wheel hub body 100, and the output speed of the motor assembly 300 is conveniently adjusted through the reduction assembly 400 to adjust it to a suitable speed for the vehicle, and the reduction assembly 400 is adjusted by The reduction ratio is adjusted to increase the output torque of the motor assembly 300 to better adapt to different loads and facilitate operation in harsh environments; the hub body 100 is connected to the vehicle body through the first support shaft 200, and the first support shaft 200 is fixedly connected to the vehicle body outside the sealed cavity, and the other end is rotatably connected to the reduction assembly 400 and the hub body 100 in the sealed cavity, and the rotational connection is specifically achieved through bearings, that is, when the motor assembly 300 drives the hub body 100 to rotate, the hub body 100 is installed on the vehicle body through the first support shaft 200, so that the hub body 100 can rotate stably on the vehicle body, and in addition, a sealing assembly 500 is provided on the outer periphery of the first support shaft 200 inside the hub body 100, and the sealing assembly 50 The sealing connection between the first support shaft 200 and the hub body 100 can prevent foreign substances such as moisture and dust from entering the sealing cavity, thereby avoiding affecting the operation of the motor assembly 300. Specifically, the sealing assembly 500 includes a first mounting seat 510 and a second mounting seat 520. The first mounting seat 510 and the second mounting seat 520 are both annular structures. The first mounting seat 510 is sleeved on the outer periphery of the first support shaft 200 and has an interference fit with the first support shaft 200. The second mounting seat 520 is sleeved on the outer periphery of the first support shaft 200 and is fixedly connected to the hub body 100 and rotates with the hub body 100. The opposite surfaces of the first mounting seat 510 and the second mounting seat 520 are in contact, and the first mounting seat 510 is away from the second mounting seat 520. A pushing structure is installed on one side, and the pushing structure applies pressure to the first mounting seat 510 toward the second mounting seat 520, so that the first mounting seat 510 and the second mounting seat 520 are in close contact. When the motor assembly 300 drives the hub body 100 to rotate, the first mounting seat 510 and the second mounting seat 520 rotate relatively. However, due to the cooperation between the first mounting seat 510 and the first support shaft 200, the close contact between the first mounting seat 510 and the second mounting seat 520, and the connection between the second mounting seat 520 and the hub body 100, external impurities such as moisture and dust cannot enter the interior of the motor assembly 300, that is, the sealing assembly 500 seals the connection between the first support shaft 200 and the hub body 100, effectively improving the overall sealing effect.

[0055] Among them, the motor assembly 300 includes structures such as a motor housing, a stator, a rotor and an encoder. The encoder connects the motor and an external power supply to control the rotation of the rotor. This solution does not improve the motor assembly 300 and will not be described in detail here.

[0056] It should be noted that the vehicle body generally has multiple wheel hub assemblies. For example, two wheel hub assemblies are arranged in parallel on both sides of the front side of the vehicle body, one side of the wheel hub assembly faces the inside of the vehicle body, and the other side faces the outside edge of the vehicle body. In the present embodiment, one side of the first support shaft 200 is arranged to face the outside edge of the vehicle body, and the other side, i.e., the fixed end of the motor assembly 300, faces the inside of the vehicle body, and it extends out of the sealed cavity to connect with the vehicle body. Since the inside of the vehicle body itself has a sealing structure such as a sealing plate, it seals the connection between the fixed end of the motor assembly 300 and the wheel hub body 100, so there is no need to set an additional seal. Since the first support shaft 200 extends out of the sealed cavity and faces the outside of the vehicle body, it is easily affected by the environment. Therefore, by setting a sealing assembly 500 to seal the first support shaft 200 and the wheel hub body 100, it can effectively prevent dust, moisture, etc. from entering the wheel hub body 100 from the side, thereby avoiding affecting the rotation and operation of the wheel hub assembly.

[0057] In an embodiment of the utility model, the pushing structure includes a third mounting seat 530 and an elastic member 540, the third mounting seat 530 and the elastic member 540 are sleeved on the outer periphery of the first support shaft 200, and the third mounting seat 530 is arranged on the side of the first mounting seat 510 away from the second mounting seat 520, and the elastic member 540 elastically connects the third mounting seat 530 and the first mounting seat 510.

[0058] Please refer to Figure 5 The pushing structure includes a third mounting seat 530 and an elastic member 540. The third mounting seat 530 is fixed on the outer periphery of the first support shaft 200, and the elastic member 540 is installed between the third mounting seat 530 and the first mounting seat 510. It should be noted that the elastic member 540 is in a compressed state between the first mounting seat 510 and the third mounting seat 530. Even if the first mounting seat 510 is in a relatively static state with the first support shaft 200 on the first support shaft 200, the elastic member 540 still provides pressure on the first mounting seat 510 toward the second mounting seat 520, so that the second mounting seat 520 is tightly fitted with the first mounting seat 510 while rotating with the hub body 100, thereby ensuring the sealing effect.

[0059] In an embodiment of the present utility model, the deceleration assembly 400 includes:

[0060] The first-stage deceleration structure 410 is disposed in the sealed cavity and is drivingly connected to the output end;

[0061] The secondary reduction structure 420 is disposed in the sealed cavity, and the primary reduction structure 410 is transmission-connected to the hub body 100 via the secondary reduction structure 420 .

[0062] Please refer to Figure 2 and Figure 4 As shown in FIGS. and, the deceleration assembly 400 adopts two-stage deceleration, which can increase the deceleration ratio, achieve a large speed reduction and torque increase from the motor assembly 300 to the hub body 100. Moreover, adopting two-stage deceleration can make the entire deceleration assembly 400 and the motor assembly 300 occupy a smaller space, that is, multi-stage deceleration can also be achieved within the limited space of the hub body 100, and the load can be evenly distributed to reduce vibration and noise, making the operation smoother. Specifically, the first-stage deceleration structure 410 is connected to the output end of the motor assembly 300 in the sealed cavity, and one end of the second-stage deceleration structure 420 is connected to the first-stage deceleration structure 410, and the other end is connected to the hub body 100 in the sealed cavity to realize the driving of the hub body 100 to rotate by the motor assembly 300.

[0063] In the embodiment of the present invention, the first-stage deceleration structure 410 includes:

[0064] A first sun gear 411, connected to the output end;

[0065] A ring gear 414, disposed on the outer periphery of the first sun gear 411 and connected to the fixed end;

[0066] A first planet gear 412, disposed between the first sun gear 411 and the first planet gear 412, and the first planet gear 412 meshes and transmits with the first sun gear 411 and the ring gear 414 respectively;

[0067] A first planet carrier 413, the first planet gear 412 is rotatably disposed on the first planet carrier 413, and the first planet carrier 413 is in transmission connection with the second-stage deceleration structure 420.

[0068] Please refer to Figure 4, the speed reduction assembly 400 includes a speed reducer housing 430. The speed reducer housing 430 is fixedly connected to the motor housing. Specifically, a plurality of screws are circumferentially spaced to connect the speed reducer housing 430 and the motor housing. A ring gear 414 is fixed inside the speed reducer housing 430. A rack is provided on the inner wall of the ring gear 414. The first sun gear 411 is in the middle of the ring gear 414. A first planet gear 412 is provided between the first sun gear 411 and the ring gear 414. A plurality of first planet gears 412 are circumferentially spaced along the ring gear 414. The plurality of first planet gears 412 are mounted on the first planet carrier 413. By the rotation of the first sun gear 411, the first planet gears 412 are driven to revolve. Also, due to the fixation of the ring gear 414, the first planet gears 412 rotate while revolving, thus driving the rotation of the first planet carrier 413. The output of the first planet carrier 413 is decelerated compared with the first sun gear 411, and the first deceleration of the speed reduction assembly 400 is also achieved. In addition, the rotational output of the first planet carrier 413 serves as the input power of the secondary speed reduction structure 420. The first planet carrier 413 drives the secondary speed reduction structure 420 to rotate for further deceleration.

[0069] In an embodiment of the present invention, the secondary speed reduction structure 420 includes:

[0070] A second sun gear 421, coaxially arranged with the first sun gear 411, and the first planet carrier 413 is connected to the second sun gear 421;

[0071] A second planet gear 422, arranged between the ring gear 414 and the second sun gear 421, and meshing with the second sun gear 421 and the ring gear 414 respectively;

[0072] A second planet carrier 423, the second planet gear 422 is rotatably arranged on the second planet carrier 423, and the second planet carrier 423 is fixedly connected to the hub body 100.

[0073] Please refer to Figure 4 , the second planet carrier 423 is coaxially connected to the second sun gear 421, that is, the second planet carrier 423 drives the second sun gear 421 to rotate. At least one second planet gear 422 is circumferentially spaced between the second sun gear 421 and the ring gear 414. The plurality of second planet gears 422 are mounted on the second planet carrier 423. Similarly to the first planet carrier 413, the second sun gear 421 meshes with the second planet gears 422. When the second sun gear 421 rotates, it drives the second planet gears 422 to revolve. And due to the fixation of the ring gear 414, the second planet gears 422 rotate while revolving, also driving the rotation of the second planet carrier 423. The second planet carrier 423 is connected to the inner wall of the hub body 100 by screws, and then the rotation of the hub body 100 is realized.

[0074] It should be noted that one or two ring gears 414 can be provided. If there are two ring gears 414, they are arranged axially. The first planet gear 412 and the second planet gear 422 are respectively engaged with one ring gear 414. In this embodiment, one ring gear 414 is provided, and both the first planet gear 412 and the second planet gear 422 are engaged with this ring gear 414, which not only achieves the effect of secondary deceleration, but also saves costs and reduces the occupied space.

[0075] In an embodiment of the present utility model, the hub body 100 includes a first end cover 110 and a second end cover 120. The first end cover 110 and the second end cover 120 enclose a sealed cavity. A through hole 121 is provided at one end of the second end cover 120 away from the first end cover 110, and the end of the second end cover 120 provided with the through hole 121 is close to the outside of the vehicle body. The first support shaft 200 passes through the through hole 121 outward from the sealed cavity and is connected to the vehicle body.

[0076] Please refer to Figure 1 and Figure 2 , since the first end cover 110 is close to the inner side of the vehicle body, due to the sealing performance of the vehicle body itself, there is no need to set a sealing structure. A through hole 121 is provided at the second end cover 120, which facilitates the first support shaft 200 to pass through the through hole 121 and be fixed on the vehicle body. And the first support shaft 200 is rotatably connected to the hub body 100 through a bearing in the sealed cavity. Without affecting the rotation of the hub body 100, it not only makes the connection between the hub body 100 and the vehicle body firm, but also improves the stability and safety during driving. And the through hole 121 is close to the outside of the vehicle body, which simplifies the assembly process of the first support shaft 200 and the vehicle body. In addition, the first end cover 110 and the second end cover 120 are connected by screws. When it is necessary to repair or replace the parts inside the hub body 100, it is convenient to separate the first end cover 110 and the second end cover 120 to repair or replace the structure inside the sealed cavity.

[0077] In an embodiment of the present utility model, the hub assembly further includes a sealing ring 600, and the sealing ring 600 is sealingly connected to the first end cover 110 and the second end cover 120.

[0078] Please refer to Figure 2 , the sealing ring 600 closely adheres to the contact surface between the first end cover 110 and the second end cover 120, improving the sealing performance of the hub body 100. It can effectively prevent external moisture, dust, etc. from entering the sealed cavity, and also reduce the wear of internal structures, lower the maintenance cost, and extend the service life of the hub assembly. In addition, since the motor assembly 300 and the reduction assembly 400 are arranged in the sealed cavity and lubricating oil, etc. is required for operation, the setting of the sealing ring 600 can also effectively prevent the leakage of lubricating oil. Among them, the sealed cavity can be made of materials such as fluororubber. Fluororubber can work for a long time at high temperatures and also has good antioxidant and ultraviolet resistance properties, which is suitable for outdoor and harsh environments.

[0079] In an embodiment of the present utility model, a through groove is provided on a side of the first end cover 110 away from the second end cover 120. The hub assembly further includes a second support shaft 210. One end of the second support shaft 210 is connected to the vehicle body, and the other end penetrates into the through groove to be connected to the fixed end.

[0080] Please refer to Figure 1 and Figure 2 , one end of the second support shaft 210 is connected to the fixed end of the motor assembly 300, that is, the housing of the motor assembly 300, in the sealed cavity through screws, and the other end extends outwards from the through groove and is connected to the vehicle body. Moreover, the second support shaft 210 is rotatably connected to the hub body 100 through a bearing at the through groove. That is, the hub body 100 is installed on the vehicle body through the second support shaft 210 and the first support shaft 200, improving the overall stability. And the second support shaft 210 disperses the loads from the vehicle body and the hub body 100, reducing the pressure borne by the first support shaft 200 and improving the overall reliability and durability.

[0081] In an embodiment of the present utility model, the contact surfaces of the first mounting seat 510 and the second mounting seat 520 are both provided with ceramics, silicon carbide or carbon graphite. Since the first mounting seat 510 and the second mounting seat 520 rotate relative to each other, there are extremely high requirements for the wear resistance of the contact surfaces of the first mounting seat 510 and the second mounting seat 520. For example, ceramics have very high hardness, can effectively resist wear, and have corrosion resistance, so they are also suitable for harsh environments. Silicon carbide has a relatively hard material, has very high wear resistance, and has good heat conductivity to achieve effective heat dissipation. Another example is carbon graphite, which has self-lubricating properties, can reduce the friction between the first mounting seat 510 and the second mounting seat 520, and improve the reliability and service life of the seal.

[0082] The present utility model also proposes a vehicle, which includes a vehicle body and a hub assembly. The specific structure of the hub assembly refers to the above embodiments. Since this vehicle adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0083] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A wheel hub assembly, installed on a vehicle body, characterized in that, The wheel hub assembly comprises: A first support shaft, used to connect with the vehicle body; A hub body, wherein a sealed cavity is formed inside the hub body, and one end of the first support shaft extends into the sealed cavity and is rotatably connected to the hub body; A motor assembly is disposed in the sealed cavity, the motor having a fixed end and an output end, the fixed end being connected to the vehicle body; A reduction assembly is disposed in the sealing cavity, the hub body and the output end are connected in transmission via the reduction assembly, and the motor assembly drives the hub body to rotate via the reduction assembly; A sealing assembly is arranged in the sealing cavity, and the sealing assembly is arranged on the outer periphery of the first support shaft. The sealing assembly includes a first mounting seat, a second mounting seat and a pushing structure. The first mounting seat is rotatably connected to the second mounting seat. The first mounting seat is sleeved on the outside of the first support shaft and has an interference fit with the first support shaft. The second mounting seat is fixedly connected to the inner wall of the hub body and rotates with the hub body. The pushing structure is drivingly connected to the first mounting seat so that the first mounting seat is tightly pressed against the second mounting seat.

2. The wheel hub assembly according to claim 1, wherein, The pushing structure includes a third mounting seat and an elastic member, the third mounting seat and the elastic member are sleeved on the outer periphery of the first support shaft, and the third mounting seat is arranged on a side of the first mounting seat away from the second mounting seat, and the elastic member elastically connects the third mounting seat and the first mounting seat.

3. The wheel hub assembly according to claim 2, wherein, The deceleration assembly comprises: A first-stage deceleration structure is disposed in the sealed cavity and is drivingly connected to the output end; The secondary reduction structure is arranged in the sealing cavity, and the primary reduction structure is transmission-connected with the hub body through the secondary reduction structure.

4. The wheel hub assembly according to claim 3, characterized in that, The first-stage deceleration structure comprises: A first sun gear connected to the output end; a ring gear, disposed on the outer periphery of the first sun gear and connected to the fixed end; A first planetary gear is disposed between the first sun gear and the first planetary gear, and the first planetary gear is meshed with the first sun gear and the ring gear for transmission; A first planet carrier, wherein the first planetary gear is rotatably arranged on the first planet carrier, and the first planet carrier is drivingly connected to the secondary reduction structure.

5. The hub assembly according to claim 4, wherein, The secondary reduction structure comprises: a second sun gear, which is coaxially arranged with the first sun gear, and the first planet carrier is connected with the second sun gear; a second planetary gear, disposed between the ring gear and the second sun gear, and meshing with the second sun gear and the ring gear respectively; A second planet carrier, the second planetary gear is rotatably arranged on the second planet carrier, and the second planet carrier is fixedly connected to the hub body.

6. The wheel hub assembly according to claim 2, wherein, The hub body includes a first end cover and a second end cover, the first end cover and the second end cover together form a sealed cavity, the second end cover is provided with a through hole at one end away from the first end cover, and the end of the second end cover provided with the through hole is close to the outside of the vehicle body, and the first support shaft passes through the through hole from the inside of the sealed cavity to the outside and is connected to the vehicle body.

7. The wheel hub assembly according to claim 6, wherein The wheel hub assembly further includes a sealing ring, which seals and connects the first end cover and the second end cover.

8. The hub assembly according to claim 7, characterized in that, A through groove is provided on a side of the first end cover away from the second end cover. The hub assembly further includes a second support shaft, one end of the second support shaft is connected to the vehicle body, and the other end penetrates into the through groove to be connected to the fixed end.

9. The wheel hub assembly according to claim 1, wherein, Contact surfaces of the first mounting seat and the second mounting seat are both provided with ceramics, silicon carbide or carbon graphite.

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a hub assembly. The hub assembly is the hub assembly according to any one of claims 1 to 9, and the hub assembly is mounted on the vehicle body.

Images