A rotary air chamber device, a tire inflation and deflation system, and a vehicle

Abstract

The application discloses a rotating air cavity device, a tire inflation and deflation system and a vehicle, relates to the technical field of vehicle inflation and deflation devices, and aims to solve the problem that an assembly worker has a large assembly difficulty when assembling a vehicle inflation and deflation system. The application provides a rotating air cavity device applied to a vehicle, which comprises an inner ring, an outer ring and a connecting structure, the inner ring is used for being sleeved on a driving shaft of the vehicle, and the inner ring is provided with a ventilation hole. The outer ring is sleeved outside the inner ring and can rotate relative to the inner ring, an annular cavity is arranged between the outer ring and the inner ring, the annular cavity is communicated with the ventilation hole, the outer ring is provided with a mounting hole, the mounting hole is communicated with the annular cavity, and the mounting hole is used for connecting the inflation and deflation system of the vehicle. The connecting structure is fixed on the outer ring, and the connecting structure is used for being fixed with a steering knuckle of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle inflation / deflation devices, and more particularly to a rotary air chamber device, a tire inflation / deflation system, and a vehicle. Background Technology

[0002] The tire inflation / deflation system of a car, especially the central tire inflation / deflation system, is a system that can automatically improve tire pressure. The connection process between the tire inflation / deflation device and the tire involves multiple steps and key components. Due to the close connection between various parts of the car, it is difficult for assembly personnel to observe the specific connection structure between the inflation / deflation device and the tire when assembling other parts of the vehicle, making the installation quite difficult. Summary of the Invention

[0003] The purpose of this invention is to provide a rotating air chamber device, a tire inflation / deflation system, and a vehicle, aiming to solve the problem of high assembly difficulty for assemblers when assembling a vehicle inflation / deflation system.

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

[0005] In a first aspect, this application provides a rotary air chamber device for use in a vehicle. The rotary air chamber device includes an inner ring, an outer ring, and a connecting structure. The inner ring is fitted onto the vehicle's drive shaft and has a vent hole. The outer ring is fitted outside the inner ring and is rotatable relative to the inner ring. An annular cavity is provided between the outer and inner rings, communicating with the vent hole. The outer ring has a mounting hole communicating with the annular cavity and used to connect to the vehicle's inflation / deflation system. The connecting structure is fixed to the outer ring and is used to fix to the vehicle's steering knuckle.

[0006] With the above setup, after the vehicle's rotating air chamber device is installed with the vehicle's drive shaft, the assembly personnel can assemble the other parts of the vehicle onto the vehicle. After the connecting structure fixes the rotating air chamber device to the vehicle's steering knuckle, even if the assembly personnel cannot see the specific connection structure at the assembly point, the rotating air chamber structure can be well fixed in the corresponding installation position through the connecting structure, and misalignment will not occur.

[0007] Meanwhile, the inner and outer rings in the rotating air chamber device can rotate relative to each other. The outer ring is connected to the fixed steering knuckle, and the inner ring is connected to the rotating drive shaft. In this way, the connection between the entire rotating air chamber device and the drive shaft and steering knuckle is more stable, and the reliability of the rotating air chamber device in this application is also improved.

[0008] In some embodiments, the rotating air chamber device further includes a first annular seal and a second annular seal, the first annular seal and the second annular seal being located between the inner ring and the outer ring and arranged at intervals along the axial direction of the inner ring; the annular cavity is located between the first annular seal and the second annular seal.

[0009] In some embodiments, the first annular seal includes an outer sealing ring and an inner sealing ring;

[0010] The outer sealing ring includes a first fixing part fixed to the outer ring and a first support part extending from the first fixing part to the inner ring; the inner sealing ring includes a second fixing part fixed to the inner ring and a second support part extending from the second fixing part to the outer ring.

[0011] The first support portion contacts the second fixing portion, and / or the second support portion contacts the first fixing portion.

[0012] In some embodiments, the first support portion contacts the second fixing portion, and the second support portion and the first fixing portion are arranged radially apart along the outer ring.

[0013] In some embodiments, the inner sealing ring further includes an extension that extends from one end of the second support toward the first fixing portion toward the first support portion, and the extension and the first fixing portion are radially spaced apart along the outer ring.

[0014] In some embodiments, the first support portion and the second fixing portion are arranged radially spaced along the outer ring, and the second support portion is in contact with the first fixing portion.

[0015] In some embodiments, the outer sealing ring further includes at least one first sealing rib, the first sealing rib extending from the first support portion to the second support portion and contacting the second support portion; and / or,

[0016] The inner sealing ring also includes at least one second sealing rib, which extends from the second support portion toward the first support portion and contacts the first support portion.

[0017] In some embodiments, the rotating air chamber device further includes a first set of balls and a second set of balls. The first set of balls includes a plurality of first balls disposed between an inner ring and an outer ring, and arranged circumferentially along the inner ring. The second set of balls includes a plurality of second balls disposed between the inner ring and the outer ring, and arranged circumferentially along the inner ring. The first set of balls and the second set of balls are spaced apart axially along the inner ring; an annular cavity is located between the first set of balls and the second set of balls.

[0018] In some embodiments, the first annular seal and the first set of balls are located on the same side of the annular cavity, and there are two first annular seals, which are located on the side of the first set of balls facing the annular cavity and the side facing away from the annular cavity, respectively.

[0019] In some embodiments, the inner ring includes an inner ring body and a first retaining ring.

[0020] The outer surface of the inner ring body is provided with a first annular notch that is recessed into the inner side of the inner ring body; one end of the inner ring body along the axial direction of the inner ring is the first end; the first annular notch is located between the first end and the annular cavity, and the first annular notch penetrates the end face of the first end.

[0021] The first retaining ring is housed within the first annular notch, and the first set of balls is located between the first end and the annular cavity, with the first set of balls in contact with the first retaining ring.

[0022] In some embodiments, the inner surface of the inner ring is provided with an annular groove that extends circumferentially along the inner ring; the vent hole communicates with the annular groove.

[0023] In some embodiments, the connection structure includes a connecting plate; the connecting plate extends radially from the outer surface of the outer ring away from the inner ring, and the connecting plate is provided with fixing holes for fixing to the steering knuckle of the vehicle.

[0024] Secondly, this application provides a tire inflation / deflation system, which includes a steering knuckle, a wheel hub, a tire, a vent pipe, an inflation / deflation system, and the aforementioned rotating air chamber device. A vent passage is provided within the drive shaft, with a first end and a second end at its two ends. The drive shaft is connected to the wheel hub via a transmission connection. The tire is mounted on the wheel hub. The vent pipe connects the first end of the vent passage to the internal space of the tire. The inner ring of the rotating air chamber device is fitted onto the drive shaft, and the vent hole of the rotating air chamber device communicates with the second end of the vent passage. The connecting structure of the rotating air chamber device is fixed to the steering knuckle, and the inflation / deflation system is connected to the mounting hole of the rotating air chamber device.

[0025] Thirdly, this application provides a vehicle including a chassis and the aforementioned tire inflation / deflation system, wherein the steering knuckle is fixed relative to the chassis, and the inflation / deflation system is fixed to the chassis.

[0026] The technical effects of any of the implementation methods in the second to third aspects mentioned above can be found in the technical effects of the corresponding implementation methods in the first aspect, and will not be repeated here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is one of the assembly diagrams of a tire inflation / deflation system provided in an embodiment of this application;

[0029] Figure 2 This is a second assembly diagram of a tire inflation / deflation system provided in an embodiment of this application;

[0030] Figure 3 This is one of the assembly schematic diagrams of a rotating air chamber device provided in the embodiments of this application;

[0031] Figure 4 This is a second assembly schematic diagram of a rotating air chamber device provided in an embodiment of this application;

[0032] Figure 5 This is one of the structural schematic diagrams of a rotating air chamber device provided in an embodiment of this application;

[0033] Figure 6 This is a second schematic diagram of a rotating air chamber device provided in an embodiment of this application;

[0034] Figure 7 This is the third schematic diagram of a rotating air chamber device provided in the embodiments of this application.

[0035] Figure label:

[0036] 100-Drive shaft; 101-Ventilation duct 101; 200-Steering knuckle; 300-Tire; 400-Wheel hub; 500-Rotating air chamber device; 501-Inner ring; 5011-Inner ring body; 50111-First annular notch; 5012-First retaining ring; 5013-Annular groove; 5014-Ventilation hole; 502-Outer ring; 5021-Mounting hole; 503-First annular seal; 5031-Outer sealing ring; 50311-First support part; 5031 2-First fixing part; 50313-First sealing rib; 50314-Second sealing rib; 5032-Inner sealing ring; 50321-Second support part; 50322-Second fixing part; 50323-Extension part; 504-Second annular seal; 505-Connecting structure; 5051-Connecting plate; 5052-Fixing hole; 506-First ball; 507-Second ball; 508-Annular cavity; 600-Ventilation pipe; 700-Gap; 800-Retainer. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Unless otherwise specified, the above-described orientation can be flexibly set in practical applications, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a communication between the internal components of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In embodiments of the invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0042] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] In related technologies, in order to improve the safety of vehicles during driving and the adaptability of vehicles to different road conditions, a tire inflation / deflation system is installed in the vehicle. The tire inflation / deflation system includes an inflation / deflation system installed on the vehicle chassis, and the inflation / deflation system is provided with an air outlet. The air passage 101 inside the vehicle tire 300 is connected to the air outlet of the inflation / deflation system.

[0044] During the actual installation of the tire inflation / deflation system, it is difficult for the assembler to observe the specific connection between the air passage 101 inside the vehicle tire 300 and the air outlet of the inflation / deflation system.

[0045] Furthermore, to ensure airtightness during the inflation and deflation process, a seal is installed at the aforementioned connection point. During assembly, because it is difficult for assemblers to observe the specific components at the connection point, the seal can easily be damaged or misaligned when assembling other components.

[0046] To address the aforementioned technical problems, this application provides a vehicle, which includes a chassis that provides stable support for the entire vehicle while supporting its components and passengers.

[0047] For example, the vehicle in this application can be a gasoline-powered vehicle, an electric vehicle, a hybrid vehicle, a natural gas vehicle, a methanol vehicle, a solar-powered vehicle, etc. This application does not impose specific limitations in this regard.

[0048] As another example, the vehicle in this application can be a passenger car such as a sedan, sport utility vehicle (SUV), or multi-purpose vehicle (MPV), or a bus, truck, or semi-trailer. This application does not impose any specific limitations in this regard.

[0049] In addition, in order to meet the needs of the vehicle under different driving conditions and environmental conditions, the vehicle in this application also includes a tire inflation / deflation system, which is fixed to the chassis.

[0050] In some embodiments, see Figure 1 and combined Figure 2 This application embodiment also provides a tire inflation / deflation system, which includes an inflation / deflation system that provides an air source for the tire 300.

[0051] Among them, tire 300 can be the tire 300 of the front wheel of the vehicle or the tire 300 of the rear wheel of the vehicle.

[0052] For example, the inflation / deflation system includes an air pump mounted on the vehicle chassis, which provides air to the tires 300.

[0053] In addition, the tire inflation / deflation system also includes a drive shaft 100, the input end of which is connected to other transmission components on the chassis, and the output end of which is connected to the wheel hub 400. The drive shaft 100 provides power to the wheels.

[0054] It should be noted that the drive shaft 100 in this application can be either the front axle or the rear axle of a vehicle, and this application does not limit it in this regard.

[0055] The tire inflation / deflation system also includes a steering knuckle 200, a wheel hub 400, and a tire 300. The steering knuckle 200 is connected to the wheel hub 400 via a bearing, and provides support to the wheel. The tire 300 is mounted on the wheel hub 400, which supports and secures the tire 300, transmitting the vehicle's power, braking force, and steering force to the tire 300.

[0056] The drive shaft 100 is provided with a ventilation channel 101, and the two ends of the ventilation channel 101 are the first end and the second end, respectively.

[0057] The ventilation duct 101 of the drive shaft 100 includes a main ventilation duct 1011 and a side ventilation duct 1012. The cross-sectional diameter of the main ventilation duct 1011 is greater than or equal to 5 mm and less than or equal to 12 mm.

[0058] For example, the cross-sectional diameter of the main ventilation duct 1011 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0059] In addition, the spatial angle between the centerline of the lateral air passage 1012 of the drive shaft 100 and the centerline of the main air passage 1011 is greater than or equal to 90° and less than or equal to 180°, so as to ensure that the structural design of the drive shaft 100 meets the requirements.

[0060] For example, the spatial angle between the centerline of the lateral air passage 1012 of the drive shaft 100 and the centerline of the main air passage 1011 can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170° or 180°.

[0061] The tire inflation / deflation system also includes a vent pipe 600. The air inlet of the vent pipe 600 is connected to the first end of the vent 101 (which can be understood as the air outlet of the vent 101). The air outlet of the vent pipe 600 is connected to the air inlet of the tire 300. The vent pipe 600 connects the first end of the vent 101 and the internal space of the tire 300, so that the vehicle can inflate or deflate the tire 300.

[0062] For example, the vent pipe 600 is fixed to the surface of the hub 400 by a mounting bracket.

[0063] The second end of the vent 101 of the drive shaft 100 (understandably, the second end here is the air inlet of the vent 101) is connected to the air outlet of the inflation / deflation system so that the gas generated by the inflation / deflation system can be introduced into the tire 300.

[0064] In some embodiments, see Figure 3 In order to enhance the airtightness of the connection between the drive shaft 100 and the inflation / deflation system, a rotating air chamber device 500 is provided at the connection between the second end of the ventilation channel 101 (not shown in the figure) and the air outlet of the inflation / deflation system.

[0065] join Figure 3 and combined Figure 5 The rotating air chamber device 500 includes an inner ring 501 and an outer ring 502. The inner ring 501 is sleeved on the drive shaft 100 of the vehicle. The inner ring 501 is provided with a vent hole 5014, which is connected to the second end of the air passage 101.

[0066] The radial diameter of the outer ring 502 is greater than or equal to 120 mm and less than or equal to 140 mm. For example, the radial diameter of the outer ring 502 can be 120 mm, 130 mm or 140 mm.

[0067] For example, the gap between the outer wall surface of the outer ring 502 and the steering knuckle 200 is greater than or equal to 3 mm and less than or equal to 10 mm. For instance, the gap between the outer wall surface of the outer ring 502 and the steering knuckle 200 can be 3 mm, 7 mm, or 10 mm.

[0068] For example, the overall width of the rotary air chamber device 500 is greater than or equal to 20mm and less than or equal to 30mm to prevent the rotary air chamber device 500 from colliding with the steering knuckle 200 after assembly. For example, the overall width of the rotary air chamber device 500 can be 20mm, 20.5mm or 30mm.

[0069] In addition, the outer ring 502 of the rotating air chamber device 500 is sleeved outside the inner ring 501, and the inner ring 501 and the outer ring 502 can rotate relative to each other. An annular cavity 508 is provided between the outer ring 502 and the inner ring 501. The annular cavity 508 is connected to the vent 5014. The outer ring 502 is provided with a mounting hole 5021, which is connected to the annular cavity 508. The mounting hole 5021 is used to connect the vehicle's inflation and deflation system.

[0070] For example, the inflation / deflation system includes a connecting pipe that communicates with the mounting hole 5021 via a connecting nozzle.

[0071] In another example, the inflation / deflation system includes a connecting pipe, one end of which extends into the interior of the mounting hole 5021 and is threadedly connected to the mounting hole 5021.

[0072] In some embodiments, see Figure 4 The rotary air chamber device 500 in this application also includes a connecting structure 505, which is fixed to the outer ring 502 and is used to fix to the steering knuckle 200 of the vehicle.

[0073] By providing a connecting structure 505 between the outer ring 502 and the steering knuckle 200, a fixed point can be provided for the rotary air chamber device 500. In this way, even if the assembler cannot see or squeezes the rotary air chamber device 500 while assembling the part, the rotary air chamber device 500 will not be misaligned.

[0074] In some practical examples, the connecting structure 505 is a snap-fit ​​structure, and the outer ring 502 is snap-fitted to the steering knuckle 200.

[0075] In other embodiments, see Figure 4 The connecting structure 505 includes a connecting plate 5051, which extends radially from the outer surface of the outer ring 502 away from the inner ring 501. The connecting plate 5051 is provided with a fixing hole 5052 for fixing to the steering knuckle 200 of the vehicle. The outer ring 502 is bolted to the steering knuckle 200 of the vehicle through the fixing hole 5052.

[0076] Meanwhile, the rotary air chamber device 500 in this application is a separate component, detachably connected to the vehicle's drive shaft 100 and steering knuckle 200. Before assembly with vehicle parts or during vehicle air tightness testing, the rotary air chamber device 500 can be tested for air tightness independently, eliminating the need to test the entire assembly. This improves production efficiency while reducing vehicle maintenance costs during use.

[0077] Specifically, during the assembly of the above-mentioned components, the assembler first connects the drive shaft 100 to the power system on the vehicle chassis, and then installs the steering knuckle 200 and wheel hub 400 on the drive shaft 100 through connecting components such as bearings.

[0078] After the steering knuckle 200 is installed, the assembly personnel have difficulty accurately observing the fit between the drive shaft 100 and the steering knuckle 200, and therefore cannot effectively observe the fit between the drive shaft 100 and the vehicle's inflation / deflation system.

[0079] The rotary air chamber device 500 provided in this application effectively solves the problem that it is difficult for assembly personnel to directly observe the coordination between the drive shaft 100 and the vehicle inflation / deflation system when assembling wheels, through the rotational design of the inner ring 501 and the outer ring 502 and the connection structure 505 between the outer ring 502 and the steering knuckle 200.

[0080] In some embodiments, see Figure 7 The rotary air chamber device 500 of this application further includes a first annular seal 503 and a second annular seal 504, which are located between the inner ring 501 and the outer ring 502 and are spaced apart along the axial direction of the inner ring 501. The annular cavity 508 is located between the first annular seal 503 and the second annular seal 504.

[0081] It should be noted that, in order to meet the inflation and deflation speed of the vehicle, the diameter of the annular cavity 508 needs to be greater than or equal to 8mm.

[0082] in, Figure 7 The Y direction shown is a schematic direction of gas flow when inflating the tire 300. Figure 7 The X direction shown is perpendicular to the gas flow direction.

[0083] It can be seen that along Figure 7 In the X direction, the first annular seal 503 and the second annular seal 504 effectively seal both sides of the annular cavity 508, which can effectively prevent gas leakage and avoid affecting the inflation and deflation of the tire 300.

[0084] In some embodiments, see continue to see Figure 5 To ensure the connection strength and rigidity between the rotating air chamber device 500 and other components during operation, the inner ring 501 and the outer ring 502 are cast parts.

[0085] In some embodiments, in order to reduce the friction between the inner ring 501 and the outer ring 502, the materials used for the first annular seal 503 and the second annular seal 504 in this application include elastic elements.

[0086] On the one hand, the elastic element can reduce the friction generated between the inner ring 501 and the outer ring 502 of the rotating air chamber device 500 during rotation, thus extending the service life of the device. On the other hand, when installing the elastic element, the assembler can apply appropriate pre-pressure to the elastic element so that the elastic element can fit tightly against the surfaces of the inner ring 501 and the outer ring 502, thus achieving a good sealing effect.

[0087] In some embodiments, see Figure 6The first annular seal 503 in this application includes an outer sealing ring 5031 and an inner sealing ring 5032. The gap 700 formed by the fit between the outer sealing ring 5031 and the inner sealing ring 5032 helps to form a double sealing structure, increasing sealing performance and reducing the possibility of gas leakage.

[0088] Meanwhile, the gap 700 formed by the mating of the outer sealing ring 5031 and the inner sealing ring 5032 can act as a buffer zone, reducing the entry of external environmental media, dust, and other particulate matter into the annular cavity. On the one hand, this prevents impurities from entering the tire 300. On the other hand, it avoids wear and malfunction of the rotating air chamber device 500.

[0089] The outer sealing ring 5031 includes a first fixing portion 50312 fixed to the outer ring 502 and a first support portion 50311 extending from the first fixing portion 50312 toward the inner ring 501. The inner sealing ring 5032 includes a second fixing portion 50322 fixed to the inner ring 501 and a second support portion 50321 extending from the second fixing portion 50322 toward the outer ring 502. The first support portion 50311 and the second fixing portion 50322 are in contact with each other, and the two are press-fitted to prevent external gas from entering the annular cavity and also to prevent gas leakage.

[0090] In other embodiments, to further enhance airtightness, the second support portion 50321 contacts the first fixing portion 50312.

[0091] In some embodiments, see Figure 6 In this application, the first support portion 50311 contacts the second fixing portion 50322, and the second support portion 50321 and the first fixing portion 50312 are arranged radially apart along the outer ring 502.

[0092] In this way, along the radial direction of the outer ring 502, the first support portion 50311 and the second fixing portion 50322 can fill the gap between the inner ring 501 and the outer ring 502, thus achieving a good sealing effect.

[0093] For example, in order to enable the first support portion 50311 and the second fixing portion 50322 to have good support to support the outer ring 502 and the inner ring 501, both the first support portion 50311 and the second fixing portion 50322 are vulcanized parts.

[0094] Furthermore, in order to reduce the damping between the first support portion 50311 and the second fixing portion 50322, thereby making the inner ring 501 slide more smoothly, the contact part between the first support portion 50311 and the second fixing portion 50322 is made of rubber.

[0095] In some embodiments, see Figure 6The inner sealing ring 5032 in this application also includes an extension 50323, which extends from one end of the second support portion 50321 toward the first fixing portion 50312 toward the first support portion 50311, and the extension 50323 and the first fixing portion 50312 are arranged radially apart along the outer ring 502.

[0096] It can be seen that the extension 50323 extends into the gap 700 formed between the outer sealing ring 5031 and the inner sealing ring 5032, which can prevent external impurities from entering the gap 700 and further protect the annular cavity 508.

[0097] Based on this, a first annular notch 50111 is formed between the second support part 50321 and the first fixing part 50312. In this way, the second support part 50321 and the first fixing part 50312 will not dampen the inner ring 501 during rotation, thus making the rotation process of the inner ring 501 smoother.

[0098] In some embodiments, see Figure 6 The outer sealing ring 5031 in this application also includes at least one first sealing rib 50313. The first sealing rib 50313 is an elastic element. The first sealing rib 50313 extends from the first support portion 50311 to the second support portion 50321 and contacts the second support portion 50321.

[0099] On the one hand, the first sealing rib 50313 can withstand a certain amount of compression and deformation, maintaining the stability and sealing performance between the first support portion 50311 and the second support portion 50321. On the other hand, the first sealing rib 50313 can fill the gap 700 formed by the fit between the outer sealing ring 5031 and the inner sealing ring 5032, preventing gas leakage from the annular cavity and avoiding the mixing of external impurities into the annular cavity.

[0100] Furthermore, in order to further enhance airtightness, the inner sealing ring 5032 also includes at least one second sealing rib 50314, which extends from the second support portion 50321 toward the first support portion 50311 and contacts the first support portion 50311.

[0101] It is understood that, in order to further enhance the airtightness of the rotating air chamber device 500 in this application, the second annular seal 504 in this application has the same structure as the first annular seal 503 mentioned above, and will not be described in detail here.

[0102] In some embodiments, see Figure 7 and combined Figure 6To further improve the smoothness of the rotation of the inner ring 501, this application also includes a first set of balls and a second set of balls. The first set of balls includes a plurality of first balls 506, which are disposed between the inner ring 501 and the outer ring 502 and arranged circumferentially along the inner ring 501. The second set of balls includes a plurality of second balls 507, which are disposed between the inner ring 501 and the outer ring 502 and arranged circumferentially along the inner ring 501.

[0103] The first and second sets of balls are arranged at intervals along the axial direction of the inner ring 501. The annular cavity 508 is located between the first and second sets of balls.

[0104] Based on this, the first and second sets of ball bearings can reduce the friction generated by the inner ring 501 during rotation, thereby improving the smoothness and efficiency of the inner ring 501's movement and extending the service life of the rotating air chamber device 500.

[0105] Meanwhile, by setting the first set of ball bearings and the second set of ball bearings, the inner ring 501 can rotate more smoothly and stably relative to the outer ring 502, reducing vibration, noise and impact, and making the inner ring 501 more reliable and durable during rotation.

[0106] In some embodiments, see Figure 7 and combined Figure 6 In this application, the first annular seal 503 and the first set of balls are located on the same side of the annular cavity 508, and there are two first annular seals 503. The two first annular seals 503 are located on the side of the first set of balls facing the annular cavity 508 and the side facing away from the annular cavity 508, respectively.

[0107] In other embodiments, the second annular seal 504 and the second set of balls are located on the same side of the annular cavity 508, and there are two second annular seals 504, which are located on the side of the second set of balls facing the annular cavity 508 and the side facing away from the annular cavity 508, respectively.

[0108] In some embodiments, see Figure 7 and combined Figure 6 In order to make the rotation process of the ball more stable, this application also includes a cage 800, which is respectively disposed between two first annular seals 503 and two second annular seals 504.

[0109] By setting the retainer 800, the swing range of the first set of balls and the second set of balls on the rolling track can be effectively limited, preventing multiple first balls 506 and multiple second balls 507 from colliding or squeezing each other, reducing friction and wear, and extending the service life of the balls and track.

[0110] For example, the cage 800 is a plastic part.

[0111] It should be noted that, in order to improve the reliability of the rotating air chamber structure, the outer diameters of the first ball 506 and the second ball 507 are greater than or equal to 4 mm and less than or equal to 6 mm.

[0112] For example, the outer diameters of the first ball 506 and the second ball 507 are 4mm, 5mm or 6mm.

[0113] In some embodiments, see Figure 7 and combined Figure 6 To facilitate assembly by assembly personnel, a safety gap is provided between the retainer 800 and the first annular seal 503 and the second annular seal 504.

[0114] In some embodiments, in order to further improve the smoothness of the first ball 506 and the second ball 507 during rotation, the surfaces of the first ball 506 and the second ball 507 are coated with a lubricant.

[0115] In some embodiments, see Figure 7 and combined Figure 6 The inner ring 501 in this application includes an inner ring body 5011 and a first retaining ring 5012. The outer surface of the inner ring body 5011 is provided with a second annular notch recessed into the inner side of the inner ring body 5011 (i.e., the position of the first retaining ring 5012 in the figure). By providing the second annular notch, the assembler can easily slide the ball into the space between the inner ring 501 and the outer ring 502.

[0116] One end of the inner ring body 5011 along the axial direction of the inner ring 501 is the first end. The second annular notch is located between the first end and the annular cavity 508, and the second annular notch penetrates the end face of the first end.

[0117] The first retaining ring 5012 is housed within the second annular notch, and the first set of balls is located between the first end and the annular cavity 508, with the first set of balls in contact with the first retaining ring 5012.

[0118] Meanwhile, by fixing the pulley with the first retaining ring 5012, maintenance personnel can more easily inspect, clean, and maintain the pulley, thereby improving the maintenance efficiency of the equipment.

[0119] In some embodiments, see Figure 7 and combined Figure 6 In this application, the inner surface of the inner ring 501 is provided with an annular groove 5013, which extends circumferentially along the inner ring 501. The vent hole 5014 communicates with the annular groove 5013.

[0120] The annular groove 5013 can increase the area of ​​communication between the vent hole 5014 and the inner ring 501, improve the ventilation effect of the rotating air chamber device 500, and improve the ventilation efficiency and speed.

[0121] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0122] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rotating air chamber device, applied to a vehicle, characterized in that, include: Inner ring (501), the inner ring (501) is used to be sleeved on the drive shaft (100) of the vehicle, and the inner ring (501) is provided with a vent hole (5014). An outer ring (502) is fitted around the inner ring (501) and can rotate relative to the inner ring (501). An annular cavity (508) is provided between the outer ring (502) and the inner ring (501). The annular cavity (508) is connected to the vent (5014). The outer ring (502) is provided with a mounting hole (5021). The mounting hole (5021) is connected to the annular cavity (508) and is used to connect the connecting pipe of the vehicle's inflation / deflation system. A connecting structure (505) is fixed to the outer ring (502). The connecting structure (505) includes a connecting plate (5051). The connecting plate (5051) extends radially from the outer surface of the outer ring (502) away from the inner ring (501). The connecting plate (5051) is provided with a fixing hole (5052) for fixing to the steering knuckle (200) of the vehicle so that the outer wall surface of the outer ring (502) maintains a gap with the steering knuckle (200).

2. The rotating air chamber device according to claim 1, characterized in that, Also includes: A first annular seal (503) and a second annular seal, the first annular seal (503) and the second annular seal are located between the inner ring (501) and the outer ring (502) and are spaced apart along the axial direction of the inner ring (501); the annular cavity (508) is located between the first annular seal (503) and the second annular seal.

3. The rotating air chamber device according to claim 2, characterized in that, The first annular seal (503) includes an outer sealing ring (5031) and an inner sealing ring (5032). The outer sealing ring (5031) includes a first fixing part (50312) fixed to the outer ring (502) and a first support part (50311) extending from the first fixing part (50312) toward the inner ring (501); the inner sealing ring (5032) includes a second fixing part (50322) fixed to the inner ring (501) and a second support part (50321) extending from the second fixing part (50322) toward the outer ring (502). The first support portion (50311) contacts the second fixing portion (50322), and / or the second support portion (50321) contacts the first fixing portion (50312).

4. The rotating air chamber device according to claim 3, characterized in that, The first support portion (50311) contacts the second fixing portion (50322), and the second support portion (50321) and the first fixing portion (50312) are arranged radially apart along the outer ring (502).

5. The rotating air chamber device according to claim 4, characterized in that, The inner sealing ring (5032) further includes an extension (50323) that extends from one end of the second support portion (50321) toward the first fixing portion (50312) toward the first support portion (50311), and the extension portion (50323) and the first fixing portion (50312) are radially spaced along the outer ring (502).

6. The rotating air chamber device according to claim 3, characterized in that, The first support portion (50311) and the second fixing portion (50322) are arranged radially apart along the outer ring (502), and the second support portion (50321) is in contact with the first fixing portion (50312).

7. The rotating air chamber device according to claim 3, characterized in that, The outer sealing ring (5031) further includes at least one first sealing rib (50313), the first sealing rib (50313) extending from the first support portion (50311) to the second support portion (50321) and contacting the second support portion (50321); and / or, The inner sealing ring (5032) further includes at least one second sealing rib (50314), which extends from the second support portion (50321) toward the first support portion (50311) and contacts the first support portion (50311).

8. The rotating air chamber device according to claim 2, characterized in that, Also includes: The first set of balls includes a plurality of first balls (506), which are disposed between the inner ring (501) and the outer ring (502) and arranged circumferentially along the inner ring (501); The second set of balls includes a plurality of second balls (507), which are disposed between the inner ring (501) and the outer ring (502) and arranged circumferentially along the inner ring (501); The first set of balls and the second set of balls are arranged at intervals along the axial direction of the inner ring (501); the annular cavity (508) is located between the first set of balls and the second set of balls.

9. The rotating air chamber device according to claim 8, characterized in that, The first annular seal (503) and the first set of balls are located on the same side of the annular cavity (508), and there are two first annular seals (503). The two first annular seals (503) are located on the side of the first set of balls facing the annular cavity (508) and the side facing away from the annular cavity (508), respectively.

10. The rotating air chamber device according to claim 8, characterized in that, The inner ring (501) includes an inner ring body (5011) and a first retaining ring (5012); The outer surface of the inner ring body (5011) is provided with a first annular notch (50111) that is recessed into the inner side of the inner ring body (5011); one end of the inner ring body (5011) along the axial direction of the inner ring (501) is the first end; the first annular notch (50111) is located between the first end and the annular cavity (508), and the first annular notch (50111) penetrates the end face of the first end; The first retaining ring (5012) is housed within the first annular notch (50111), the first set of balls is located between the first end and the annular cavity (508), and the first set of balls is in contact with the first retaining ring (5012).

11. The rotating air chamber device according to any one of claims 1-10, characterized in that, The inner surface of the inner ring (501) is provided with an annular groove (5013), which extends circumferentially along the inner ring (501). The vent (5014) is connected to the annular groove (5013).

12. A tire inflation / deflation system, characterized in that, include: Steering knuckle (200); A drive shaft (100) is provided with a ventilation channel, the two ends of which are a first end and a second end, respectively; The hub (400) is connected to the drive shaft (100) in a transmission manner; A tire (300) is disposed on the hub (400); A vent pipe, the vent pipe connecting the first end of the vent passage to the internal space of the tire (300); The rotary air chamber device (500) as described in any one of claims 1-11, wherein the inner ring (501) of the rotary air chamber device (500) is sleeved on the drive shaft (100), and the air vent (5014) of the rotary air chamber device (500) is connected to the second end of the air passage, and the connecting structure (505) of the rotary air chamber device (500) is fixed to the steering knuckle (200); An inflation / deflation system is provided, which is connected to the mounting hole (5021) of the rotating air chamber device (500).

13. A vehicle, characterized in that, Includes a chassis and a tire inflation / deflation system as described in claim 12, wherein the steering knuckle (200) is fixed relative to the chassis and the inflation / deflation system is fixed to the chassis.

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