Structure and method of automatic tire inflation system additionally arranged on trailer axle

Abstract

The invention discloses a structure and method of an automatic inflation system for additionally installing tires on a trailer axle. The structure comprises a hollow axle rod, and two sets of inflation assemblies are arranged in the hollow axle rod in a mirror symmetry mode; the inflation assembly comprises a through hole formed in the middle of the hollow bridge rod and open holes formed in the two ends of the hollow bridge rod. The inflation assembly further comprises a bridge core pipe, an air inlet connector is arranged at the position, close to the through hole, of the bridge core pipe, a quick-insertion air nozzle is arranged at the position, close to the open hole, of the bridge core pipe, and the quick-insertion air nozzle is detachably connected with an air inlet rotating nozzle. A quick-inserting air inlet locking opening is formed in the end of the air inlet rotating nozzle, a sliding way coaxial with the air inlet rotating nozzle is arranged in the air inlet rotating nozzle, the quick-inserting air inlet locking opening is communicated with the sliding way, and the quick-inserting air inlet locking opening comprises a locking plate fixed clamping groove. A locking plate is arranged at the end part of the quick-inserting air tap, is matched with the locking plate fixed clamping groove and is used for locking and connecting the quick-inserting air tap and the rotary joint; the tire pressure stability can be effectively ensured, tire abrasion is reduced, and the convenience and safety of axle maintenance are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle engineering, and more particularly to a structure and method for installing an automatic tire inflation system on a trailer axle. Background Art

[0002] In modern logistics and transportation, trucks, especially freight trucks and trailers, are crucial. With the advancement of technology, the integration of unmanned driving technology has put forward higher requirements on the timeliness, safety and energy saving of trucks. However, in the process of long-distance transportation, tire deflation or insufficient air pressure is a common problem. If there is no service station nearby to replenish air in time, it will cause a series of serious consequences. For example, lack of air in the tire will cause the outer side to bulge outward and easily damage the outer tire. Insufficient air pressure will cause wear on the tire shoulder, reduced control and safety, and shortened life. Stress shock may also cause tire blowout. In addition, in some areas, such as the uninhabited area of ​​​​the Gobi Desert in Xinjiang, the road rescue cost of logistics truck trailers is high and tire repair is difficult. Sometimes due to the tight delivery time, the tire is deflated and cannot be stopped for repair, which not only shortens the life of the tire, but also poses the risk of tire blowout and economic losses.

[0003] Although some inflation systems already exist, the old systems have many problems in the maintenance and care of axle bearings. Not only are the operations complicated and cumbersome, but improper installation can easily lead to air leakage, and may even damage the axle and cause bearing failure, thus causing safety accidents. With the development of science and technology and the integration of unmanned driving technology, higher requirements are placed on the safety, timeliness and energy saving of trucks. Therefore, it is imperative to develop an easy-to-install and reliable automatic inflation system for trailer axles. Summary of the invention

[0004] In order to solve the above problems and overcome the shortcomings of the prior art, the present invention provides a structure and method for installing an automatic tire inflation system on a trailer axle.

[0005] To achieve the above-mentioned purpose, the present invention provides a structure of an automatic tire inflation system installed on a trailer axle, comprising a hollow bridge rod, and two sets of inflation assemblies are arranged inside the hollow bridge rod in a mirror-symmetrical manner;

[0006] The inflation assembly includes a through hole provided in the middle of the hollow bridge rod and openings provided at both ends of the hollow bridge rod;

[0007] The inflation assembly also includes a bridge core tube, an air intake joint is arranged near the through hole of the bridge core tube, a quick-insert air nozzle is arranged near the opening of the bridge core tube, and the quick-insert air nozzle is detachably connected to an air intake nozzle;

[0008] A quick-insert air inlet lock is provided at the end of the air inlet nozzle, a coaxial slideway is provided inside the air inlet nozzle, the quick-insert air inlet lock is connected to the slideway, and the quick-insert air inlet lock includes a locking plate fixed card slot;

[0009] A locking piece is arranged at the end of the quick-insert air nozzle, and the locking piece is matched with the locking piece fixed groove to lock and connect the quick-insert air nozzle and the rotary joint.

[0010] Furthermore, the slideway is a two-stage structure including a spring slideway and a quick-insert slideway, wherein the inner diameter of the quick-insert slideway is slightly smaller than the inner diameter of the spring slideway;

[0011] The end of the quick-insert air nozzle is also provided with a sealing O-ring and a lock core spring, and the two ends of the lock core spring are respectively against the locking plate and the sealing O-ring;

[0012] The junction between the spring slideway and the quick-insert slideway forms a stepped edge due to the difference in inner diameter;

[0013] When the quick-insert air nozzle is inserted into the slideway, the sealing O-ring slides into the quick-insert slideway and is connected with the quick-insert slideway by interference fit, and the end of the lock core spring that originally contacts the sealing O-ring abuts against the step edge.

[0014] Furthermore, the locking plate fixed slot includes a first slot arranged along the axial direction of the air intake nozzle and a second slot perpendicular to the axial direction of the air intake nozzle, and the first slot and the second slot are perpendicular to each other and connected;

[0015] The other end of the second card slot is also connected to a third card slot, the third card slot is perpendicular to the second card slot, and the other end of the third card slot is closed;

[0016] The slot width of the first card slot is the same as the thickness of the locking plate, the slot width of the second card slot is the same as the height of the locking plate, and the slot width of the third card slot is the same as the thickness of the locking plate.

[0017] Furthermore, the second slot is an arc-shaped structure with a center angle of 45 degrees.

[0018] Furthermore, a sealing rubber sleeve is provided at the end of the hollow bridge rod, and the bridge core tube passes through the sealing rubber sleeve.

[0019] Furthermore, a shaft head cover is provided at the end of the hollow bridge rod, an opening for the bridge core tube to pass through is provided in the middle of the shaft head cover, and a shaft head cover nut is provided at the opening.

[0020] Furthermore, it also includes a rotary joint, which is connected and communicated with the air inlet nozzle in a relatively rotatable manner;

[0021] A fixing thread and a locking cap are arranged on the outer facade of the rotary joint, and the fixing thread is connected with the shaft head cover nut in a meshing manner.

[0022] Furthermore, an airway is arranged inside the rotary joint, and two air inlets are arranged on the outer surface of the rotary joint. The air inlets are connected to the airway, and the airway is connected to the slideway.

[0023] Furthermore, a fixing thread is provided at the through hole position on the hollow bridge rod, and the air intake connector is connected to the hollow bridge rod via the fixing thread.

[0024] A method for installing an automatic tire inflation system on a trailer axle, which is applied to the structure of the automatic tire inflation system installed on the trailer axle:

[0025] S01: Insert the bridge core tube into the hollow bridge rod through the sealing rubber sleeve, fasten it to the fixed thread in the middle of the hollow bridge rod through the screw mouth of the air inlet joint, and tighten it to make it firm;

[0026] S02: Insert the quick-insert air nozzle into the air inlet nozzle until the locking piece enters the first slot and stops at the bottom. At this time, the sealing O-ring enters the quick-insert slideway for sealing;

[0027] S03: Push the lock plate to compress the lock core spring, which is compressed in the spring slideway. Then rotate the quick-insert air nozzle 45 degrees. After releasing the quick-insert air nozzle, the lock plate falls into the third slot and is locked under the rebound force of the lock core spring.

[0028] S04: Brake the air intake nozzle by the left bridge core tube so that it cannot rotate. Fix the swivel joint to the shaft head cover nut with the help of the fixing thread and tighten it with the locking nut so that the swivel joint and the shaft head cover are locked into one.

[0029] The beneficial effects of the present invention are:

[0030] An automatic tire inflation system for trailer axle wheels is designed, which has a reasonable structure, is easy to install and has excellent sealing performance. It can effectively ensure the stability of tire pressure, reduce tire wear, and significantly improve the convenience and safety of axle maintenance.

[0031] The installation method is simple and efficient. Under the premise of not affecting the load-bearing capacity of the axle, the system installation is facilitated by drilling holes in the middle of the axle rod, while ensuring the convenience of later maintenance and repair of the bearing. The purpose of the present invention is to provide a structure and method for installing an automatic tire inflation system on a trailer axle to solve the problems existing in the prior art.

[0032] The left bridge core tube and the left hollow bridge rod are firmly connected through specific joints and threads, and the sealing rubber sleeve and a series of sealing components are used to ensure the tightness of gas transmission. The combination of the quick-insert gas nozzle and the rotary joint can achieve convenient installation and stable locking through structures such as locking plates, springs and slots, ensuring reliable connection of the gas passage. The right bridge core tube and related components are arranged symmetrically with the left part to form a complete inflation system. This symmetrical design not only ensures the stability of the structure, but also facilitates production and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Attached Figure 1 It is a structural cross-sectional view of the present invention;

[0034] Attached Figure 2 It is an enlarged schematic diagram of the position of the rotary joint of the present invention;

[0035] Among them, 1. left swivel joint, 2. quick-insert air nozzle, 3. shaft head cover nut, 4. shaft head cover, 5. left sealing rubber sleeve, 6. left hollow bridge rod, 7. left bridge core tube, 8. left fixed thread, 9. left air inlet joint, 10. right air inlet joint, 11. right fixed thread, 12. right bridge core tube, 13. right hollow bridge rod, 14. right sealing rubber sleeve, 15. right swivel joint, 16. locking plate, 17. lock core spring, 18. sealing O-ring, 19. air inlet nozzle, 20. spring slide, 21. quick-insert slide, 22. locking cap, 23. fixed thread, 24. locking plate fixed slot, 25. quick-insert air inlet lock. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present invention more clear, the following will be combined with the appended claims of the present invention. Figure 1 ~Attached Figure 2 , the present invention is described in more detail.

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0038] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0039] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0040] The present invention provides a structure of an automatic tire inflation system for a trailer axle, comprising a hollow bridge rod, wherein two sets of inflation assemblies are arranged inside the hollow bridge rod in a mirror-symmetrical manner; the inflation assembly comprises a through hole opened in the middle of the hollow bridge rod and openings opened at both ends of the hollow bridge rod; the inflation assembly also comprises a bridge core tube, wherein an air intake joint is arranged at a position of the bridge core tube near the through hole, and a quick-insert air nozzle 2 is arranged at a position of the bridge core tube near the opening, and the quick-insert air nozzle 2 is connected to an air intake nozzle 19 in a detachable manner; a quick-insert air intake lock 25 is arranged at the end of the air intake nozzle 19, and a coaxial slideway is arranged inside the air intake nozzle 19, and the quick-insert air intake lock 25 is connected to the slideway, and the quick-insert air intake lock 25 comprises a locking plate The locking groove 24 is provided at the end of the quick-insert air nozzle 2, and the locking plate 16 is adapted to the locking plate fixing groove 24 and locks the quick-insert air nozzle 2 and the rotary joint. The slideway is a two-stage structure including a spring slideway 20 and a quick-insert slideway 21, wherein the inner diameter of the quick-insert slideway 21 is slightly smaller than the inner diameter of the spring slideway 20. The end of the quick-insert air nozzle 2 is also provided with a sealing O-ring 18 and a lock core spring 17, and the two ends of the lock core spring 17 are respectively against the locking plate 16 and the sealing O-ring 18; the junction of the spring slideway 20 and the quick-insert slideway 21 forms a stepped edge due to the inner diameter difference; when the quick-insert air nozzle 2 is inserted into the slideway, the sealing O-ring 18 slides into the quick-insert slideway 21 and is in an interference fit with the quick-insert slideway 21. The locking plate 16 is connected in a manner such that the end of the lock core spring 17 that originally contacts the sealing O-ring 18 rests on the edge of the step; the locking plate fixed groove 24 includes a first groove arranged along the axial direction of the air intake nozzle 19 and a second groove perpendicular to the axial direction of the air intake nozzle 19, the first groove and the second groove are perpendicular to each other and connected; the other end of the second groove is also connected to a third groove, the third groove is perpendicular to the second groove, and the other end of the third groove is closed; the slot width of the first groove is the same as the thickness of the locking plate 16, the slot width of the second groove is the same as the height of the locking plate 16, and the slot width of the third groove is the same as the thickness of the locking plate 16; the second groove is an arc structure, and the center angle of the circle is 45 degrees; a sealing groove is provided at the end of the hollow bridge rod The bridge core tube passes through the sealing rubber sleeve; a shaft head cover 4 is also provided at the end of the hollow bridge rod, and an opening is provided in the middle of the shaft head cover 4 for the bridge core tube to pass through, and a shaft head cover nut 3 is provided at the opening; it also includes a rotary joint, which is connected and communicated with the air inlet nozzle 19 in a relatively rotatable manner; a fixing thread 23 and a locking cap 22 are provided on the outer facade of the rotary joint, and the fixing thread 23 is connected with the shaft head cover nut 3 in a meshing manner; an airway is provided inside the rotary joint, and two air inlets are provided on the outer facade of the rotary joint, the air inlets are communicated with the airway, and the airway is communicated with the slideway; a fixing thread is provided at the through hole position on the hollow bridge rod, and the air inlet joint is connected to the hollow bridge rod through the fixing thread.

[0041] A method for installing an automatic tire inflation system on a trailer axle, which is applied to the structure of the automatic tire inflation system installed on the trailer axle:

[0042] S01: Insert the bridge core tube into the hollow bridge rod through the sealing rubber sleeve, fasten it to the fixed thread in the middle of the hollow bridge rod through the screw mouth of the air inlet joint, and tighten it to make it firm;

[0043] S02: Insert the quick-insert air nozzle 2 into the air inlet nozzle 19 until the locking piece 16 enters the first slot and stops at the bottom. At this time, the sealing O-ring 18 enters the quick-insert slideway 21 for sealing;

[0044] S03: Push the lock plate 16 to compress the lock core spring 17, the lock core spring 17 is compressed in the spring slide 20, and then the quick-insert air nozzle 2 is rotated 45 degrees. After the quick-insert air nozzle 2 is released, the lock plate 16 falls into the third slot and is locked under the rebound force of the lock core spring 17;

[0045] S04: Braking is performed through the left bridge core tube 7 so that the air intake nozzle 19 cannot rotate, and the rotary joint is fixed to the shaft head cover nut 3 with the help of the fixing thread 23, and tightened with the locking cap 22, so that the rotary joint and the shaft head cover 4 are locked into one.

[0046] Embodiment 1 is as follows:

[0047] A structure of an automatic tire inflation system installed on a trailer axle includes a hollow bridge rod. Two sets of inflation assemblies are arranged inside the hollow bridge rod in a mirror-symmetrical manner. The structures at both ends of the hollow bridge rod are identical and mirror-symmetrical. For the convenience of description, the hollow bridge rod is divided into a left hollow bridge rod 6 and a right hollow bridge rod 13. The two sets of inflation assemblies include a left inflation assembly and a right inflation assembly, which are respectively arranged inside the left hollow bridge rod 6 and the right hollow bridge rod 13.

[0048] Two through holes are provided in the middle of the hollow bridge rod, namely a left through hole and a right through hole. A left fixing thread 8 is provided at the left through hole. The left air intake connector 9 is connected to the left hollow bridge rod 6 via the left fixing thread 8 .

[0049] The left opening is formed at the left end of the hollow bridge rod, where a left sealing rubber sleeve 5 is provided, and a left bridge core tube 7 passes through the left sealing rubber sleeve 5 .

[0050] The end of the left hollow bridge rod 6 is also provided with a shaft head cover 4, the middle of the shaft head cover 4 is provided with an opening for the left bridge core tube 7 to pass through, and a shaft head cover nut 3 is provided at the opening;

[0051] A left air inlet joint 9 is provided at a position of the left bridge core tube 7 near the left through hole, and a quick-insert air nozzle 2 is provided at a position of the left bridge core tube 7 near the left opening, and the quick-insert air nozzle 2 is detachably connected to an air inlet rotating nozzle 19;

[0052] A quick-insert air inlet lock 25 is provided at the end of the air inlet nozzle 19, and a coaxial slideway is provided inside the air inlet nozzle 19. The quick-insert air inlet lock 25 is connected to the slideway, and the quick-insert air nozzle 2 can be inserted into the slideway. At this time, the locking plate 16 of the quick-insert air nozzle 2 is located at the position of the quick-insert air inlet lock 25, and the quick-insert air nozzle 2 is located inside the slideway. The locking and fixing are completed by the locking plate 16 and the quick-insert air inlet lock 25, and the airway is connected by the quick-insert air nozzle 2 and the slideway. When the quick-insert air nozzle 2 is inserted into the slideway, the sealing O-ring 18 slides into the quick-insert slideway 21 and is connected to the quick-insert slideway 21 by an interference fit, so as to achieve an airtight effect.

[0053] The quick-insert air inlet lock 25 includes a locking plate fixing groove 24 , and a locking plate 16 is provided at the end of the quick-insert air nozzle 2 . The locking plate 16 is adapted to the locking plate fixing groove 24 and locks and connects the quick-insert air nozzle 2 and the left rotary joint 1 .

[0054] Furthermore, the slideway is a two-stage structure including a spring slideway 20 and a quick-insert slideway 21, wherein the inner diameter of the quick-insert slideway 21 is slightly smaller than the inner diameter of the spring slideway 20, and a step edge is formed at the junction of the spring slideway 20 and the quick-insert slideway 21 by the inner diameter difference. When the lock core spring 17 enters the spring slideway 20, the sealing O-ring 18 can slide into the quick-insert slideway 21 in an interference fit manner due to its elastic characteristics, and the lock core spring 17 is stuck at the step edge;

[0055] The locking plate fixed slot 24 includes a first slot arranged along the axial direction of the air intake nozzle 19 and a second slot perpendicular to the axial direction of the air intake nozzle 19. The first slot and the second slot are perpendicular to each other and connected. The first slot is a straight-line structure that matches the structure of the locking plate 16. The second slot is an arc structure with a center angle of 45 degrees.

[0056] The other end of the second card slot is also connected to a third card slot, the third card slot is perpendicular to the second card slot, the other end of the third card slot is closed, the slot width of the first card slot is the same as the thickness of the locking piece 16, the slot width of the second card slot is the same as the height of the locking piece 16, and the slot width of the third card slot is the same as the thickness of the locking piece 16, and a combined structure is formed by the first card slot, the second card slot and the third card slot;

[0057] When the locking piece 16 is inserted into the first slot and moves inward along the first slot to the bottom, the locking piece 16 enters the second slot and then can be rotated to move to the position of the third slot. Since one end of the lock core spring 17 has been against the step edge, the lock core spring 17 is in a compressed state at this time. In order to overcome the compressed state, the locking piece 16 will move in the opposite direction in the third slot, thereby getting stuck in the third slot and completing the locking.

[0058] Furthermore, it also includes a left rotary joint 1, which is connected and communicated with the air inlet nozzle 19 in a relatively rotatable manner, and when the left rotary joint 1 rotates, the air inlet nozzle 19 can be kept from rotating;

[0059] A fixing thread 23 and a locking cap 22 are provided on the outer surface of the left rotary joint 1. The fixing thread 23 is connected to the shaft head cover nut 3 in an engaging manner. The left rotary joint 1 can be fixed on the left hollow bridge rod 6 through the engagement of the fixing thread 23 and the shaft head cover nut 3. At this time, the air intake nozzle 19 is connected to the quick-plug air nozzle 2 to form a channel for the brake high-pressure gas.

[0060] Furthermore, an air duct is provided inside the left rotary joint 1, and two air inlets are provided on the outer surface of the left rotary joint 1. The air inlets are connected to the air duct, and the air duct is connected to the slideway. The left air inlet joint 9 is connected to the brake air, which enters the air duct of the left rotary joint 1 through the left bridge core tube 7 and the air inlet nozzle 19 and is output from the air inlet.

[0061] Further, the structure on the right is explained:

[0062] Two through holes are opened in the middle of the hollow bridge rod, namely a right through hole and a right through hole. A right fixing thread 11 is arranged at the right through hole. The right air intake connector 10 is connected to the right hollow bridge rod 13 via the right fixing thread 11.

[0063] The right opening is formed at the right end of the right hollow bridge rod 13 , where a right sealing rubber sleeve 14 is provided, and the right bridge core tube 12 passes through the right sealing rubber sleeve 14 .

[0064] The end of the right hollow bridge rod 13 is also provided with a shaft head cover 4, the middle of the shaft head cover 4 is provided with an opening for the right bridge core tube 12 to pass through, and a shaft head cover nut 3 is provided at the opening;

[0065] A right air inlet joint 10 is provided at a position of the right bridge core tube 12 near the right through hole, and a quick-insert air nozzle 2 is provided at a position of the right bridge core tube 12 near the right opening, and the quick-insert air nozzle 2 is detachably connected to an air inlet rotating nozzle 19;

[0066] A quick-insert air inlet lock 25 is provided at the end of the air inlet nozzle 19, and a coaxial slideway is provided inside the air inlet nozzle 19. The quick-insert air inlet lock 25 is connected to the slideway, and the quick-insert air nozzle 2 can be inserted into the slideway. At this time, the locking plate 16 of the quick-insert air nozzle 2 is located at the position of the quick-insert air inlet lock 25, and the quick-insert air nozzle 2 is located inside the slideway. The locking and fixing are completed by the locking plate 16 and the quick-insert air inlet lock 25, and the airway is connected by the quick-insert air nozzle 2 and the slideway. When the quick-insert air nozzle 2 is inserted into the slideway, the sealing O-ring 18 slides into the quick-insert slideway 21 and is connected to the quick-insert slideway 21 by an interference fit, so as to achieve an airtight effect.

[0067] The quick-insert air inlet lock 25 includes a locking plate fixing groove 24 , and a locking plate 16 is provided at the end of the quick-insert air nozzle 2 . The locking plate 16 is adapted to the locking plate fixing groove 24 and locks and connects the quick-insert air nozzle 2 and the right rotary joint 15 .

[0068] Furthermore, the slideway is a two-stage structure including a spring slideway 20 and a quick-insert slideway 21, wherein the inner diameter of the quick-insert slideway 21 is slightly smaller than the inner diameter of the spring slideway 20, and a step edge is formed at the junction of the spring slideway 20 and the quick-insert slideway 21 by the inner diameter difference. When the lock core spring 17 enters the spring slideway 20, the sealing O-ring 18 can slide into the quick-insert slideway 21 in an interference fit manner due to its elastic characteristics, and the lock core spring 17 is stuck at the step edge;

[0069] The locking plate fixed slot 24 includes a first slot arranged along the axial direction of the air intake nozzle 19 and a second slot perpendicular to the axial direction of the air intake nozzle 19. The first slot and the second slot are perpendicular to each other and connected. The first slot is a straight-line structure that matches the structure of the locking plate 16. The second slot is an arc structure with a center angle of 45 degrees.

[0070] The other end of the second card slot is also connected to a third card slot, the third card slot is perpendicular to the second card slot, the other end of the third card slot is closed, the slot width of the first card slot is the same as the thickness of the locking piece 16, the slot width of the second card slot is the same as the height of the locking piece 16, and the slot width of the third card slot is the same as the thickness of the locking piece 16, and a combined structure is formed by the first card slot, the second card slot and the third card slot;

[0071] When the locking piece 16 is inserted into the first slot and moves inward along the first slot to the bottom, the locking piece 16 enters the second slot and then can be rotated to move to the position of the third slot. Since one end of the lock core spring 17 has been against the step edge, the lock core spring 17 is in a compressed state at this time. In order to overcome the compressed state, the locking piece 16 will move in the opposite direction in the third slot, thereby getting stuck in the third slot and completing the locking.

[0072] Furthermore, it also includes a right rotary joint 15, which is connected and communicated with the air intake nozzle 19 in a relatively rotatable manner, and when the right rotary joint 15 rotates, the air intake nozzle 19 can be kept from rotating;

[0073] A fixing thread 23 and a locking cap 22 are provided on the outer surface of the right rotary joint 15. The fixing thread 23 is connected to the shaft head cover nut 3 in an engaging manner. The right rotary joint 15 can be fixed on the right hollow bridge rod 13 through the engagement of the fixing thread 23 and the shaft head cover nut 3. At this time, the air intake nozzle 19 is connected to the quick-plug air nozzle 2 to form a channel for the brake high-pressure gas.

[0074] Furthermore, an air duct is provided inside the right rotary joint 15, and two air inlets are provided on the outer surface of the right rotary joint 15. The air inlets are connected to the air duct, and the air duct is connected to the slideway. The right air inlet joint 10 is connected to the brake air, which enters the air duct of the right rotary joint 15 through the right bridge core tube 12 and the air inlet nozzle 19 and is output from the air inlet.

[0075] Without affecting the load-bearing capacity of the axle, reasonable drilling of holes in the middle of the bridge rod facilitates the installation of the system and ensures the convenience of subsequent maintenance of the bearings.

[0076] The arrangement of the right bridge core tube 12 and related components is symmetrical with the left portion to form a complete inflation system. This symmetrical design not only ensures the stability of the structure, but is also convenient for production and installation.

[0077] Embodiment 2 is as follows:

[0078] A method for installing an automatic tire inflation system on a trailer axle, which is applied to the structure of the automatic tire inflation system installed on the trailer axle:

[0079] S01: insert the left bridge core tube 7 into the left hollow bridge rod 6 through the left sealing rubber sleeve 5, at this time, one end of the left bridge core tube 7 is located inside the left hollow bridge rod 6, and the other end is located outside the left hollow bridge rod 6, and the left air intake connector 9 is installed on the end located inside the left hollow bridge rod 6, the screw mouth of the left air intake connector 9 passes through the left through hole, is fastened to the left through hole through the left fixing thread 8, and is tightened to make it firm, completing the installation of the air intake end, and connecting the left air intake connector 9 to the vehicle body brake cylinder through the brake air pipe;

[0080] S02: Insert the quick-insert air nozzle 2 into the air inlet nozzle 19. At this time, the sealing O-ring 18 enters the quick-insert slideway 21 for sealing. When the lock core spring 17 enters the spring slideway 20, the sealing O-ring 18 can slide into the quick-insert slideway 21 in an interference fit manner due to its elastic characteristics to form a sealing structure, and the lock core spring 17 is stuck at the edge of the step;

[0081] S03: When the locking piece 16 is inserted into the first slot and moves inward along the first slot to the bottom, the locking piece 16 enters the second slot. At this time, the locking piece 16 compresses the lock core spring 17, and the lock core spring 17 is compressed in the spring slide 20. Then the quick-plug air nozzle 2 is rotated 45 degrees to rotate the locking piece 16 45 degrees in the second slot to the position of the third slot. Since one end of the lock core spring 17 was against the edge of the step before, the lock core spring 17 is in a compressed state at this time. In order to overcome the compressed state, after the quick-plug air nozzle 2 is released, under the action of the rebound force of the lock core spring 17, the locking piece 16 falls into the third slot and locks, thereby being stuck in the third slot to complete the locking.

[0082] S04: Since the left bridge core tube 7 is fixed, the air intake nozzle 19 can be braked so that it cannot rotate. The swivel joint is fixed to the shaft head cover nut 3 with the help of the fixing thread 23 and tightened with the locking cap 22, so that the swivel joint and the shaft head cover 4 are locked into one, completing the installation of the left inflation assembly.

[0083] Then complete the installation of the right inflator assembly on the right side in the same manner.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structure for installing an automatic tire inflation system on a trailer axle, characterized in that: It comprises a hollow bridge rod, wherein two sets of inflatable assemblies are arranged inside the hollow bridge rod in a mirror-symmetrical manner; The inflation assembly includes a through hole provided in the middle of the hollow bridge rod and openings provided at both ends of the hollow bridge rod; The inflation assembly further includes a bridge core tube, wherein an air intake joint is arranged at a position of the bridge core tube near the through hole, and a quick-insert air nozzle is arranged at a position of the bridge core tube near the opening, and the quick-insert air nozzle is detachably connected to an air intake rotating nozzle; The end of the air inlet nozzle is provided with a quick-insert air inlet lock, the interior of the air inlet nozzle is provided with a slideway coaxial therewith, the quick-insert air inlet lock is communicated with the slideway, and the quick-insert air inlet lock includes a locking plate fixed card slot; A locking piece is arranged at the end of the quick-insert air nozzle, and the locking piece is matched with the locking piece fixed groove to lock and connect the quick-insert air nozzle and the rotary joint.

2. The structure of the automatic tire inflation system installed on the trailer axle according to claim 1 is characterized by: The slideway is a two-stage structure including a spring slideway and a quick-insert slideway, wherein the inner diameter of the quick-insert slideway is slightly smaller than the inner diameter of the spring slideway; The end of the quick-insert air nozzle is also provided with a sealing O-ring and a lock core spring, and the two ends of the lock core spring are respectively against the locking plate and the sealing O-ring; The junction between the spring slideway and the quick-insert slideway forms a stepped edge due to the inner diameter difference; When the quick-insert air nozzle is inserted into the slideway, the sealing O-ring slides into the quick-insert slideway and is connected with the quick-insert slideway in an interference fit manner, and the end of the lock core spring that originally contacts the sealing O-ring abuts against the step edge.

3. The structure of the automatic tire inflation system installed on the trailer axle according to claim 2 is characterized by: The locking plate fixed slot includes a first slot arranged along the axial direction of the air intake nozzle and a second slot perpendicular to the axial direction of the air intake nozzle, wherein the first slot and the second slot are perpendicular to each other and connected; The other end of the second card slot is also connected to a third card slot, the third card slot is perpendicular to the second card slot, and the other end of the third card slot is closed; The slot width of the first card slot is the same as the thickness of the locking plate, the slot width of the second card slot is the same as the height of the locking plate, and the slot width of the third card slot is the same as the thickness of the locking plate.

4. The structure of the automatic tire inflation system installed on the trailer axle according to claim 3 is characterized by: The second slot is an arc-shaped structure, and the center angle of the arc-shaped structure is 45 degrees.

5. The structure of the automatic tire inflation system installed on the trailer axle according to claim 1 is characterized by: A sealing rubber sleeve is arranged at the end of the hollow bridge rod, and the bridge core tube passes through the sealing rubber sleeve.

6. The structure of the automatic tire inflation system installed on the trailer axle according to claim 1, characterized in that: The end of the hollow bridge rod is also provided with a shaft head cover, the middle of the shaft head cover is provided with an opening for the bridge core tube to pass through, and the opening is provided with a shaft head cover nut.

7. The structure of the automatic tire inflation system installed on the trailer axle according to claim 6, characterized in that: It also includes a rotary joint, which is connected and communicated with the air inlet nozzle in a relatively rotatable manner; A fixing thread and a locking cap are arranged on the outer facade of the rotary joint, and the fixing thread is connected with the shaft head cover nut in a meshing manner.

8. The structure of the automatic tire inflation system installed on the trailer axle according to claim 7 is characterized by: An air passage is arranged inside the rotary joint, and two air inlets are arranged on the outer surface of the rotary joint. The air inlets are communicated with the air passage, and the air passage is communicated with the slideway.

9. The structure of the automatic tire inflation system installed on the trailer axle according to claim 1, characterized in that: A fixing thread is provided at the through hole position on the hollow bridge rod, and the air intake joint is connected to the hollow bridge rod via the fixing thread.

10. A method for installing an automatic tire inflation system on a trailer axle, applied to the structure of the automatic tire inflation system installed on a trailer axle according to claims 1 to 9, characterized in that: S01: Insert the bridge core tube into the hollow bridge rod through the sealing rubber sleeve, fasten it to the fixed thread in the middle of the hollow bridge rod through the screw mouth of the air inlet joint, and tighten it to make it firm; S02: Insert the quick-insert air nozzle into the air inlet nozzle until the locking piece enters the first slot and stops at the bottom. At this time, the sealing O-ring enters the quick-insert slideway for sealing; S03: Push the lock plate to compress the lock core spring, which is compressed in the spring slideway. Then rotate the quick-insert air nozzle 45 degrees. After releasing the quick-insert air nozzle, the lock plate falls into the third slot and is locked under the rebound force of the lock core spring. S04: Brake the air intake nozzle by the left bridge core tube so that it cannot rotate. Fix the swivel joint to the shaft head cover nut with the help of the fixing thread and tighten it with the locking nut so that the swivel joint and the shaft head cover are locked into one.

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