Tire post-inflation device

Abstract

The utility model provides a tire post-inflation device, which belongs to the technical field of tires and comprises a frame and a plurality of post-inflation stations arranged on the frame. The post-inflation station internally comprises a first rim disc connected with the rack through a driving part, and the driving part drives the first rim disc to reciprocate in the vertical direction. The second rim disc is fixedly connected to the rack and is arranged opposite to the first rim disc; the electromagnetic coils are respectively wound on the first rim disc and the second rim disc, and the positions of the electromagnetic coils correspond to steel wire rings at the seam allowance part of the tire; and the inflation assembly is configured to be used for uniformly injecting compressed air into the inner cavity of the tire and providing power for the driving part. The utility model solves the technical problems of air leakage and badness caused by inaccurate tire positioning, incapability of keeping the horizontal state of the tire and the like in the conventional post-inflation device.

Description

Technical Field

[0001] This utility model belongs to the field of tire technology, and in particular relates to a tire rear inflation device. Background Technology

[0002] During tire manufacturing, the vulcanized tire carcass requires post-inflation to ensure uniform pressure within the carcass, thereby guaranteeing its shape and performance stability. However, current post-inflation devices have significant limitations in practical use. Existing post-inflation devices lack precise tire positioning capabilities, especially when the tire enters the inflation station, easily leading to tire misalignment.

[0003] Because the tires cannot be effectively kept level, air leaks often occur during inflation, causing the tire pressure to fall short of the expected value and affecting tire manufacturing quality. Simultaneously, tire misalignment can lead to poor sealing between the equipment contact surface and the tire blank, further exacerbating the defect rate. This phenomenon not only increases the scrap rate but also negatively impacts production efficiency and cost control.

[0004] Therefore, in view of the problems of inaccurate positioning, inability to maintain tire level and the resulting air leakage and defects in the existing technology, there is an urgent need for a solution that can improve the positioning accuracy and operational stability of the rear inflation device, so as to improve the quality and efficiency of the tire manufacturing process. Utility Model Content

[0005] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.

[0006] This utility model proposes a rear tire inflation device, which solves the technical problems of existing rear inflation devices, such as the inability to accurately position the tire, the inability to maintain the tire's level, and the resulting air leakage and other defects. It features accurate positioning, strong sealing, stable operation, high production efficiency, and high quality of finished tires.

[0007] This utility model discloses a tire rear inflation device, including a frame and multiple rear inflation stations arranged on the frame. Each rear inflation station includes: a first rim disc connected to the frame via a drive component, the drive component driving the first rim disc to reciprocate in a vertical direction; a second rim disc fixedly connected to the frame and arranged opposite to the first rim disc; and an electromagnetic coil wound on the first and second rim discs respectively, the position of the electromagnetic coil corresponding to the wire ring at the tire bead.

[0008] In some embodiments, the first rim disc has a first groove along the circumferential direction, the inner sidewall of the first groove makes an angle α of 10° to 15° with the horizontal direction, and the outer sidewall of the first groove makes an angle β of 10° to 15° with the vertical direction.

[0009] In some embodiments, the second rim disc is provided with a second groove along the circumferential direction, the inner sidewall of the second groove makes an angle θ with the horizontal direction of 10° to 15°, and the outer sidewall of the second groove makes an angle γ with the vertical direction of 10° to 15°.

[0010] In some embodiments, the rear inflation device further includes an inflation assembly, one end of which is connected to a second wheel rim disc and the other end to a drive member, configured to uniformly inject compressed air into the tire cavity and provide power to the drive member.

[0011] In some embodiments, the inflation assembly includes: a pressure controller mounted on a frame; a first inflation tube, one end of which is connected to the pressure controller and the other end of which is connected to the drive unit, and a fan is provided on the first inflation tube; and a second inflation tube, one end of which is connected to the pressure controller and the other end of which is inserted into the second wheel rim disc.

[0012] In some embodiments, the exhaust end of the air pressure controller is connected to a vent pipe, and the vent pipe is equipped with a solenoid valve.

[0013] In some embodiments, both the first and second inflation tubes have an inflation nozzle at the end furthest from the pressure controller.

[0014] In some embodiments, the second rim disc is provided with an air hole penetrating its upper and lower surfaces, and the second air tube is inserted into the air hole.

[0015] In some embodiments, the first rim disc is provided with a threaded hole, and the output end of the drive component is threadedly connected to the threaded hole of the first rim disc.

[0016] In some embodiments, the second wheel rim is fixedly connected to the frame by a number of bolts.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model discloses a rear tire inflation device. By setting electromagnetic coils on the first and second wheel rims corresponding to the steel wire rings at the tire bead, electromagnetic induction technology is used to attract the tire bead with electromagnetic force, thereby achieving automatic tire alignment correction. During tire inflation, if the tire bead position is slightly tilted or offset, the electromagnetic coils automatically adjust the distribution of the electromagnetic attraction force, gradually returning the tire to the correct alignment position, ensuring the tire's coaxiality during inflation. This electromagnetic induction method not only provides a fast and stable clamping effect but also effectively prevents tire tilting, avoiding uneven inflation or air leakage caused by tire position misalignment. Especially when the tire bead offset angle is small, the electromagnetic induction correction mechanism can complete the adjustment within milliseconds, ensuring the tire maintains a good seal during inflation and avoiding air leakage caused by misaligned bead.

[0019] 2. This utility model features a first groove and a second groove on the circumferential surfaces of the first and second wheel rims, respectively. The grooves are designed not only for fixing and winding the electromagnetic coil but also enhance its stability through a special angular geometric design. Specifically, the inner walls of the first and second grooves form an angle of 10°–15° with the horizontal direction, and the outer walls form an angle of 10°–15° with the vertical direction. This geometric design allows the electromagnetic coil to be firmly embedded in the grooves, preventing loosening, slippage, or detachment due to vibration or uneven force. Compared to directly fixing the electromagnetic coil to a flat surface, embedding it in the grooves not only makes the winding of the coil more stable but also provides an additional limiting effect through the edges of the grooves, preventing displacement of the electromagnetic coil.

[0020] 3. In this invention, a pressure controller regulates the air pressure to ensure a stable supply of compressed air. The first inflation tube is connected to both the pressure controller and the drive unit, injecting a stable air pressure into the drive unit to ensure smooth up-and-down reciprocating movement of the first wheel rim. The second inflation tube is connected to both the pressure controller and the tire, injecting compressed air evenly into the tire's inner cavity. The inflation assembly's air path design features uniform airflow distribution and rapid inflation speed. In particular, the second inflation tube can be directly inserted into the through-hole inflation hole of the second wheel rim, enabling rapid tire inflation. Furthermore, the pressure controller's exhaust end is connected to a vent pipe equipped with a solenoid valve. By controlling the opening and closing of the solenoid valve, compressed air inside the tire can be quickly released, achieving rapid venting and pressure adjustment.

[0021] 4. This utility model adopts the setting principle of multiple rear inflation stations. The inflation operation of different rear inflation stations is precisely controlled by the air pressure controller, thereby realizing efficient and automated rear inflation processing of tires of different specifications and conditions. In this utility model, the tires of each rear inflation station can be inflated independently by the air pressure controller, or the tires of multiple rear inflation stations can be inflated simultaneously.

[0022] 5. This utility model greatly reduces the difficulty of loading and unloading and the maintenance cost of the device by adopting a threaded connection between the first wheel rim and the drive component. The threaded connection not only makes the loading and unloading process simpler and faster, but also has good maintainability, which facilitates the daily inspection, replacement and component upgrade of the equipment, thereby significantly improving the operational flexibility and maintenance efficiency of the equipment.

[0023] 6. To ensure the stability of the equipment and the reliability of its installation, the second rim disc is fixedly connected to the frame with several bolts, forming a high-strength load-bearing structure. This connection method can withstand the vibration and impact forces during the inflation process, ensuring the long-term stable operation of the equipment. Furthermore, the frame, as the equipment's support platform, provides reliable support for the installation and adjustment of components such as the first rim disc, the second rim disc, the air pressure controller, and the electromagnetic coil. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the rear tire inflation device provided in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the first wheel rim disc provided in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the second wheel rim disc provided in an embodiment of the present utility model;

[0028] Figure 4 A schematic diagram of the structure for placing a tire in the rear tire inflation device provided in an embodiment of this utility model;

[0029] In the above figures: 1-Frame; 2-Rear inflation station; 3-First wheel rim; 301-First groove; 302-Threaded hole; 4-Second wheel rim; 401-Second groove; 402-Inflation hole; 5-Drive component; 6-Electromagnetic coil; 7-Inflation assembly; 701-Air pressure controller; 702-First inflation pipe; 703-Second inflation pipe; 704-Blower; 8-Deflation pipe; 9-Solenoid valve; 10-Tire. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.

[0031] This utility model provides a rear tire inflation device, see reference. Figures 1-4As shown, the device includes at least a frame 1 and multiple rear inflation stations 2 mounted on the frame. The rear inflation stations include a first rim disc 3, a second rim disc 4, an electromagnetic coil 6, and an inflation assembly 7. The first rim disc 3 is connected to the frame 1 via a drive component 5, which drives the first rim disc 3 to reciprocate vertically. The second rim disc 4 is fixedly connected to the frame 1 and is positioned opposite to the first rim disc 3. The electromagnetic coil 6 is wound around the circumference of both the first and second rim discs 3 and 4, with the position of the electromagnetic coil 6 corresponding to the steel wire ring at the bead of the tire 10. The key components of the rear inflation device in this invention are the first rim disc 3 and the second rim disc 4. The reciprocating movement of the first rim disc 3 in the vertical direction is controlled by the drive component 5 to clamp or release the tire 10. The circumferential surfaces of the first and second rim discs 3 and 4 are wound with electromagnetic coils 6 corresponding to the positions of the steel wire rings at the bead of the tire 10. When the coil is energized, the current in the coil generates an electromagnetic field, which interacts with the steel wire ring. This causes the bead portion of the tire 10 to be subjected to electromagnetic attraction, automatically adjusting to the aligned position and ensuring the coaxiality of the tire 10 during inflation. When the bead position of the tire 10 is slightly misaligned, the distribution of the electromagnetic attraction of the electromagnetic coil 6 automatically adjusts, thereby achieving an automatic correction function for the tire 10, keeping it level and ensuring the centering and uniform inflation of the tire 10. This utility model's rear tire inflation device achieves automatic correction of the tire 10 bead position through the principle of electromagnetic induction. During inflation, if the bead position of the tire 10 slightly shifts or tilts, the electromagnetic attraction of the electromagnetic coil 6 adaptively adjusts the distribution of its attraction force, gradually returning the tire 10 to the correct alignment position. This automatic correction function can complete the adjustment within milliseconds, ensuring the coaxiality of the tire 10 throughout the inflation process, thus effectively avoiding air leakage or uneven inflation caused by misaligned bead positions.

[0032] In some embodiments, the drive component 5 can take various forms, including a cylinder, a hydraulic cylinder, or a servo motor. Different types of drive components 5 can be selected according to the specific needs of the equipment and the operating environment. Cylinders are suitable for scenarios involving rapid action and high-frequency operation, hydraulic cylinders are suitable for applications with high thrust and high load, while servo motors have precise displacement control capabilities. By selecting different types of drive components 5, the driving force and operating speed of the first wheel rim 3 can be flexibly adjusted to adapt to different process requirements. In addition, the shapes of the first wheel rim 3 and the second wheel rim 4 can be adjusted according to the specifications of the tire 10, and the position of the electromagnetic coil 6 can also be optimized according to the size of the tire 10 and the distribution of the steel wire rings.

[0033] In some embodiments, the present invention employs a multi-station design to significantly improve inflation efficiency. By setting multiple rear inflation stations 2 on the frame 1, and cooperating with the air pressure controller 701 to control the inflation operations of multiple stations, parallel inflation operations at multiple stations can be achieved, thereby supporting automated and efficient inflation of tires 10 of different specifications and conditions. This design not only improves production efficiency but also enhances the flexibility of the system, meeting the production needs of various tire models 10.

[0034] Furthermore, a first groove 301 is provided on the first rim 3 along the circumferential direction. The angle α between the inner wall of the first groove 301 and the horizontal direction is 10° to 15°, and the angle β between the outer wall of the first groove 301 and the vertical direction is 10° to 15°. By providing a first groove 301 with a specific geometric structure on the circumferential surface of the first rim 3, and with the angle α between the inner wall of the first groove 301 and the horizontal direction being 10° to 15°, and the angle β between the outer wall and the vertical direction being 10° to 15°, through this double-limiting design, the electromagnetic coil 6 is not only doubly fixed radially and axially on the first rim 3, but also remains stable in a vibration environment. Even when the device is in a high-frequency vibration working environment, the electromagnetic coil 6 can be firmly held in the first groove 301, thereby effectively improving the operational stability of the device and the uniformity of electromagnetic attraction; in addition, the angle design between the inner and outer walls also improves the electromagnetic induction effect. Because the winding position of the electromagnetic coil 6 is stable and fixed, the distribution of the electromagnetically induced magnetic field is more symmetrical, avoiding the problem of uneven magnetic field caused by the loosening or deformation of the traditional electromagnetic coil 6. Therefore, this utility model can achieve automatic correction and centering of the tire 10, ensuring the coaxiality of the tire 10 during the inflation process and avoiding air leakage caused by misalignment of the tire bead.

[0035] In some embodiments, the shape of the first groove 301 can be determined according to different types of electromagnetic coils 6, and the range of included angles α and β can be adjusted according to the size and shape of the electromagnetic coil 6. For example, the range of included angles can be adjusted from 10° to 15° to 8° to 20°, thereby achieving higher limiting performance under different working conditions.

[0036] In some embodiments, the included angles α and β are preferably 11°.

[0037] Furthermore, a second groove 401 is provided on the second rim 4 along the circumferential direction. The angle θ between the inner wall of the second groove 401 and the horizontal direction is 10° to 15°, and the angle γ between the outer wall of the second groove 401 and the vertical direction is 10° to 15°. In this utility model, the second groove 401 is provided on the circumferential surface of the second rim 4, and the angle θ between its inner wall and the horizontal direction is 10° to 15°, and the angle γ between its outer wall and the vertical direction is 10° to 15°. This geometric design plays a dual limiting role for the electromagnetic coil 6, ensuring that the electromagnetic coil 6 does not loosen or slip in the environment of high-frequency vibration and external impact. Compared with the traditional planar winding method, the second groove 401 with this dual limiting design greatly improves the stability of the electromagnetic coil 6, and avoids the electromagnetic coil 6 from loosening, shifting and falling off under high-frequency vibration. The electromagnetic coil 6 within the second groove 401 remains in a stable position even after prolonged operation of the device, extending its lifespan and reducing maintenance costs and downtime. The geometric design of the second groove 401 further optimizes the electromagnetic induction effect. Because the wire of the electromagnetic coil 6 is constrained by the position of the second groove 401, the induced magnetic field distribution is more uniform, ensuring even force distribution on the tire 10 bead during adsorption. This guarantees the coaxiality and automatic alignment of the tire 10, ensuring its coaxiality during inflation and preventing air leakage caused by misalignment of the tire bead.

[0038] In some embodiments, the shape of the second groove 401 can be determined according to the requirements of different types of electromagnetic coils 6, and the range of the included angles α and β can be adjusted according to the size and shape of the electromagnetic coil 6. For example, the range of the included angle can be adjusted from 10° to 15° to 8° to 20°, thereby achieving higher limiting performance under different working conditions.

[0039] In some embodiments, the included angles α and β are preferably 11°.

[0040] Furthermore, the rear inflation device also includes an inflation assembly 7, one end of which is connected to the second wheel rim disc 4, and the other end is connected to the drive member 5. This assembly is configured to uniformly inject compressed air into the inner cavity of the tire 10 and to provide power to the drive member 5. Through its connection to the second wheel rim disc 4 and the drive member 5, the inflation assembly 7 provides compressed air to the inner cavity of the tire 10 and provides power to the drive member 5. When inflation of the tire 10 is required, the inflation assembly 7 fills the inflation channels of the second wheel rim disc 4 with compressed air and uniformly injects it into the inner cavity of the tire 10 through gas outlets distributed within the second wheel rim disc 4. Simultaneously, some of the compressed air is guided to the drive member 5, providing driving force to drive the first wheel rim disc 3 in a reciprocating motion, thereby clamping and releasing the tire 10.

[0041] Furthermore, the inflation assembly 7 includes a pressure controller 701, a first inflation pipe 702, and a second inflation pipe 703. The pressure controller 701 is mounted on the frame 1. One end of the first inflation pipe 702 is connected to the pressure controller 701, and the other end is connected to the drive unit 5. A blower 704 is mounted on the first inflation pipe 702. One end of the second inflation pipe 703 is connected to the pressure controller 701, and the other end is inserted into the second wheel rim disc 4. When the system starts the inflation operation, the air pressure controller 701 controls the gas flow in the first inflation pipe 702 and the second inflation pipe 703 according to the set air pressure value; compressed air flows into the drive component 5 through the first inflation pipe 702 to drive the reciprocating motion of the first wheel rim 3; it flows into the second wheel rim 4 through the second inflation pipe 703, and air is evenly injected into the tire 10 through the second wheel rim 4; in this utility model, the air pressure controller 701 can flexibly control the airflow of the first inflation pipe 702 and the second inflation pipe 703 according to the set air pressure requirements, ensuring that the inflation of the tire 10 and the driving process of the first wheel rim 3 do not interfere with each other, the operation is stable and the inflation efficiency is high. At the same time, when the tire 10 is being inflated, the shaping height, shaping air pressure and shaping time can be set through the air pressure control box 701 to meet the inflation requirements of different types or specifications of tires 10.

[0042] Furthermore, the exhaust end of the air pressure controller 701 is connected to a vent pipe 8, and a solenoid valve 9 is installed on the vent pipe 8. When the inflation process is completed or when it is necessary to adjust the air pressure inside the tire 10, the air pressure controller 701 controls the opening and closing of the solenoid valve 9. When the solenoid valve 9 is open, the compressed air in the vent pipe 8 will be discharged from the exhaust end of the air pressure controller 701, reducing the air pressure inside the tire 10, thereby allowing the tire 10 to be removed. By precisely controlling the opening and closing time of the solenoid valve 9, precise adjustment of the air pressure can be achieved, ensuring that the air pressure inside the tire 10 remains stable within the target range.

[0043] Furthermore, both the first inflation pipe 702 and the second inflation pipe 703 have inflation nozzles at their ends furthest from the air pressure controller. The inflation nozzle on the first inflation pipe 702 can interface well with the drive component 5, achieving efficient gas delivery and effectively preventing air leakage. The inflation nozzle on the second inflation pipe 703 ensures automatic interface between the inflation nozzle and the tire 10, ensuring airtightness and preventing leakage. The inflation nozzles improve gas delivery efficiency and ensure that gas flows only within the inner cavity of the tire 10, preventing air leakage. In addition, the standardized design of the inflation nozzles can be matched with various specifications of tires 10, adapting to different tire sizes and types, and has good versatility.

[0044] Furthermore, the second wheel rim 4 is provided with an inflation hole 402 penetrating its upper and lower surfaces, and the second inflation pipe 703 is inserted into the inflation hole 402. When the system performs rear inflation of the tire 10, compressed air is delivered to the inflation hole 402 of the second wheel rim 4 through the second inflation pipe 703. After flowing through the inflation hole 402, the air directly enters the inner cavity of the tire 10. The through structure of the inflation hole 402 ensures smooth gas flow and reduces the complexity of the inflation pipeline connection; the setting of the inflation hole 402 makes the compressed air transmission path shorter and more efficient.

[0045] Furthermore, the first wheel rim 3 is provided with a threaded hole 302, and the output end of the drive component 5 is threadedly connected to the threaded hole 302 of the first wheel rim 3. By adopting a threaded connection, the installation and disassembly of the first wheel rim 3 are more convenient, and the threaded connection has a self-locking function to prevent the connection from loosening during operation; in addition, the threaded connection has a simple structure, low cost, and is easy to maintain and replace, thus improving the reliability and durability of the equipment.

[0046] In some embodiments, threaded connections may be replaced by other connection methods, such as pin connections, snap-fit ​​connections, or quick-locking mechanisms, to simplify assembly and disassembly.

[0047] Furthermore, the second rim disc 4 is fixedly connected to the frame 1 by several bolts. The second rim disc 4 is fastened to the frame 1 with several bolts to ensure the stability and structural strength of the second rim disc 4. By using a bolted connection, high-strength fixing of the second rim disc 4 can be achieved, ensuring structural stability during clamping and inflation operations. The bolted connection also provides good disassembly, facilitating the installation, maintenance, and replacement of parts, thus improving the maintainability and operability of the equipment.

[0048] The working process of the above-mentioned rear tire inflation device is as follows:

[0049] When tire 10 is inflated at a single station, tire 10 is placed on the second rim plate 4 of the rear inflation station 2, and the steel wire ring at the bead of tire 10 is aligned with the position of electromagnetic coil 6. Under the action of electromagnetic coil 6, the steel wire ring will automatically correct tire 10 to the correct position, keep it horizontal, and prevent tire 10 from tilting and causing air leakage. After the tire 10 is fixed, the blower 704 is controlled by the air pressure control box 701 to inflate the drive component 5 in the rear inflation station 2 where the tire 10 is located. This causes the drive component 5 to drive the first wheel rim 3 to move back and forth in the vertical direction to reach the appropriate rear inflation height, thereby clamping the tire 10. When the height is reached, the blower 704 inflates the tire 10 through the inflation nozzle of the second inflation pipe 703. Due to the electromagnetic coil 6, there will be no leakage, under-inflation, or failure to inflate during the rear inflation process, allowing the tire 10 to be properly inflated and shaped. During the rear inflation, the shaping height, shaping air pressure, and shaping time can be set through the air pressure control box 701. After inflation is completed, the pressure is released through the deflation pipe 8, thereby removing the tire 10.

[0050] When multiple tires 10 are simultaneously inflated at multiple workstations, the inflated principle is similar to that of the single-workstation inflated principle. The shaping height, shaping pressure, shaping time, etc. of different workstations can be controlled by the air pressure control box 701, thereby realizing the inflated inflation of tires 10 of different specifications or types.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tire rear inflation device, comprising a frame and a plurality of rear inflation stations disposed on the frame, characterized in that, The post-inflation station includes: The first wheel rim is connected to the frame via a driving component, which drives the first wheel rim to reciprocate in the vertical direction. The second wheel rim is fixedly connected to the frame and is arranged opposite to the first wheel rim. Electromagnetic coils are wound around the circumference of the first and second wheel rim discs, respectively, and the position of the electromagnetic coils corresponds to the wire ring at the tire bead.

2. The rear tire inflation device according to claim 1, characterized in that, The first rim disc has a first groove along the circumferential direction. The angle α between the inner wall of the first groove and the horizontal direction is 10° to 15°, and the angle β between the outer wall of the first groove and the vertical direction is 10° to 15°.

3. The rear tire inflation device according to claim 1, characterized in that, The second rim disc has a second groove along the circumferential direction. The angle θ between the inner wall of the second groove and the horizontal direction is 10° to 15°, and the angle γ between the outer wall of the second groove and the vertical direction is 10° to 15°.

4. The rear tire inflation device according to claim 1, characterized in that, The rear inflation device also includes an inflation assembly, one end of which is connected to the second wheel rim disc and the other end of which is connected to the drive component. The inflation assembly is configured to inject compressed air evenly into the tire cavity and to provide power to the drive component.

5. The rear tire inflation device according to claim 4, characterized in that, The inflation assembly includes: The air pressure controller is mounted on the frame; The first inflation tube has one end connected to the air pressure controller and the other end connected to the drive component, and a fan is provided on the first inflation tube. The second inflation tube has one end connected to the air pressure controller and the other end inserted into the second wheel rim disc.

6. The rear tire inflation device according to claim 5, characterized in that, The exhaust end of the air pressure controller is connected to a vent pipe, and a solenoid valve is installed on the vent pipe.

7. The rear tire inflation device according to claim 5, characterized in that, Both the first and second inflation tubes have inflation nozzles at the ends furthest from the pressure controller.

8. The rear tire inflation device according to claim 5, characterized in that, The second wheel rim is provided with an air hole that penetrates its upper and lower surfaces, and the second air tube is inserted into the air hole.

9. The rear tire inflation device according to claim 1, characterized in that, The first wheel rim is provided with a threaded hole, and the output end of the drive component is threadedly connected to the threaded hole of the first wheel rim.

10. The rear tire inflation device according to claim 1, characterized in that, The second wheel rim is fixedly connected to the frame by several bolts.

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