Front wheel hub cover capable of transmitting signals in non-contact mode

Abstract

The invention relates to a front wheel hub cover capable of transmitting tire pressure and energy signals in a non-contact mode, and belongs to the field of tire pressure monitoring of airplane wheel braking systems. The front wheel hub cover comprises a cover cylinder, a sleeve, a capacitor plate assembly, a coil, a support assembly, a frameless coil and a connecting piece assembly. The front wheel hub cover is integrally installed on the outer side of the end face of the outer half hub bearing chamber of the front airplane wheel of the airplane. Through the non-contact coil coupling technology, the front wheel hub cover receives an energy signal provided by the in-shaft adapter, supplies power to the tire pressure sensor, then receives a tire pressure signal transmitted by the tire pressure sensor and transmits the tire pressure signal to the in-shaft adapter, and non-contact tire pressure monitoring is achieved. An effective solution is provided for improving the stability and accuracy of airplane front tire pressure signal transmission, and the problems that in the prior art, a contact type tire pressure monitoring system is prone to abrasion and low in reliability are solved.

Description

Technical Field

[0001] This invention relates to the field of tire pressure monitoring in wheel braking systems, and specifically to a front wheel hub cover that transmits tire pressure and energy signals non-contactly. Background Technology

[0002] Aircraft tires endure enormous impact loads, high-speed friction, and drastic temperature changes during takeoff and landing. Abnormal tire pressure can lead to tire blowouts, brake failures, and other problems, threatening aircraft safety during these phases. Therefore, aircraft tire pressure monitoring systems are one of the key factors ensuring flight safety. Real-time tire pressure monitoring and providing tire pressure information during flight are therefore of paramount importance.

[0003] Currently, most tire pressure monitoring systems use a contact-based design. However, under high-speed rotation and strong vibration of the wheels, contact wear and poor contact are prone to occur. Furthermore, the debris generated by wear can contaminate the bearings, leading to frequent aircraft maintenance and low reliability. Secondly, aircraft avionics have stringent weight requirements. It is necessary to reduce weight as much as possible through lightweight design while ensuring the strength and functionality of the equipment, thereby improving aircraft performance.

[0004] Therefore, it is necessary to study a front tire pressure monitoring device that can transmit tire pressure and energy signals without physical contact, and that meets the requirements of high reliability and lightweight design, in order to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved: To avoid the shortcomings of existing technologies, this invention provides a front wheel hub cover for non-contact transmission of tire pressure and energy signals. Through structural design of the front wheel hub cover, tire pressure signals are transmitted using non-contact coil coupling technology, thereby realizing non-contact tire pressure signal monitoring and solving the problems of easy wear and low reliability of existing contact tire pressure monitoring systems.

[0006] The technical solution of this invention is: a front wheel hub cover for non-contact transmission of tire pressure and energy signals, comprising: The cover cylinder is a rotating shell, which includes a side plate and a shell wall around the side plate, which together form an inner cavity of the shell. A first through hole is provided in the center of the side plate, and a hollow cylinder extending into the inner cavity of the shell is provided on the inner side of the side plate. The hollow cylinder and the first through hole are coaxial and have the same inner diameter. The sleeve is a rotating cylinder, which includes a bottom plate and a cylinder column located at the center of one side of the bottom plate. The cylinder column is inserted into the hollow cylinder. The inner side of the bottom plate contacts and is fixedly connected to the outer side of the side plate. The inner side of the bottom plate is provided with a first annular groove, and the outer diameter wall of the cylinder column is provided with a second annular groove. A capacitor plate assembly is embedded in a first annular groove and is used for signal transmission; The coil is wound in the second annular groove, and its two ends are electrically connected to the capacitor plate assembly. The coil is used for electromagnetic coupling with the in-shaft adapter mounted on the front landing gear shaft. A bracket assembly having a second through-hole for accommodating a tire pressure sensor; The frameless coil, which is installed within the bracket assembly, is used for electromagnetic coupling with the tire pressure sensor. And the connecting piece assembly, one end of which is electrically connected to the capacitor plate assembly and the other end of which is electrically connected to the frameless coil; The outer end of the shell wall is fixedly connected to the front wheel. The hollow cylinder is inserted into the internal adapter on the front landing gear shaft. The bracket assembly is fixed to the wheel flange boss on which the tire pressure sensor is installed. The tire pressure sensor is located in the second through hole 53. The energy signal provided by the internal adapter is received through the coil 4 to power the tire pressure sensor. The tire pressure signal of the tire pressure sensor is received through the frameless coil 6 and transmitted to the internal adapter.

[0007] A further technical solution of the present invention is as follows: the capacitor board assembly includes a capacitor board printed circuit board and a capacitor, the capacitor being soldered onto the capacitor board printed circuit board; the capacitor board printed circuit board is provided with two sets of insertion holes, one set of insertion holes for electrical connection with a coil, and the other set of insertion holes for soldering a printed circuit board socket assembly, the capacitor board assembly being electrically connected to the printed circuit board socket assembly; the printed circuit board socket assembly is used for electrical connection with a connecting piece assembly.

[0008] A further technical solution of the present invention is as follows: the support assembly includes an upper support and a lower support, which are fixed together; both the upper support and the lower support are provided with a second through hole, and the two second through holes are coaxial after the two are fixed; the upper support has a concave portion on the side facing the lower support, the concave portion covers the second through hole of the upper support, the outer edge of the concave portion forms a protrusion that contacts the surface of the lower support, and a receiving cavity is formed between the concave portion and the lower support, the receiving cavity is used to insert one end of the connecting piece assembly; the concave portion is provided with a third annular groove, the third annular groove is coaxial with the second through hole and located outside the second through hole of the upper support, and the frameless coil is installed in the third annular groove.

[0009] A further technical solution of the present invention is: two slots are symmetrically provided in the concave part near the third annular groove, the slots are connected to the third annular groove, the slots are used to install the welding socket assembly, the welding socket assembly is electrically connected to the frameless coil in the third annular groove by soldering; the welding socket assembly is used to electrically connect to the end of the connecting piece assembly.

[0010] A further technical solution of the present invention is: the connecting piece assembly includes two symmetrical connecting pieces, one end of the connecting piece is fixedly connected to the inner wall of the side plate of the cover cylinder, and a first pin is welded to the end of the connecting piece. The first pin passes through the corresponding through hole on the side plate and is inserted into the printed circuit board socket assembly on the capacitor board assembly; the other end of the connecting piece is fixedly connected to the bracket assembly, and a second pin is welded to the end of the connecting piece. The second pin is inserted into the welding socket assembly at the slot.

[0011] A further technical solution of the present invention is that the upper bracket, the connecting piece, and the lower bracket are closely fitted together and fixed by riveting.

[0012] A further technical solution of the present invention is: the coil has 22±1 turns, a resistance of 0.4±0.1Ω at 20℃, and an inductance of 15±0.2μH; the frameless coil is double-wound, with a single layer having 12±1 turns, a resistance of 1±0.2Ω at 20℃, and an inductance of 24±0.5μH.

[0013] A further technical solution of the present invention is: the edge of the shell wall away from the side plate is provided with 4 lugs, the 4 lugs are symmetrical in pairs, each lug is provided with a connecting hole, the connecting hole 14 is used to connect with the front wheel; the edge of the shell wall is provided with an inner groove, the inner groove is used to pass through the connecting piece assembly.

[0014] A further technical solution of the present invention is: it also includes a rubber pad, which is placed on the connecting piece assembly at the inner groove of the shell wall edge, and the rubber pad is used to seal the gap between the inner groove of the cover cylinder and the surface to be installed on the cover cylinder.

[0015] A further technical solution of the present invention is: a wire-passing groove is provided on the outer wall of the cylinder, the wire-passing groove is connected to the first annular groove and the second annular groove, and the wire-passing groove is used to lead the end of the coil to the capacitor plate assembly.

[0016] The beneficial effects of this invention are as follows: This invention provides a non-contact tire pressure and energy signal transmission front wheel hub cover. A coil installed in the sleeve is electromagnetically coupled to an in-axle adapter mounted on the front landing gear shaft. A frameless coil installed within the bracket assembly is also electromagnetically coupled to the tire pressure sensor. The coil, capacitor plate assembly, connecting piece assembly, and frameless coil in the front wheel hub cover are electrically connected, thereby forming an RLC series resonant circuit with the in-axle adapter, the front wheel hub cover, and the tire pressure sensor. Through non-contact coil coupling technology, the front wheel hub cover receives the energy signal provided by the in-axle adapter and powers the tire pressure sensor. It then receives the tire pressure signal transmitted by the tire pressure sensor and transmits it to the in-axle adapter, which then transmits it to the aircraft's tire pressure indicator board for display, thus achieving non-contact tire pressure monitoring.

[0017] This invention utilizes the magnetic field effect and the coupling between coils to receive and transmit energy and signals. The outer surfaces of both the coils are protected by a weakly magnetic cover and an upper support, ensuring the front wheel hub cap is insensitive to the surrounding magnetic field. Furthermore, the internal closed loop effectively conducts magnetism without significantly impacting other external magnetic devices. To ensure the stability and accuracy of signal transmission, this invention employs carefully designed parameters for both coils, including coil resistance, inductance, number of turns, resonant frequency, and the relative positions of the coupled coils, guaranteeing non-contact, stable, and accurate signal transmission. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional schematic diagram of the overall structure of the front wheel hub cover of the present invention; Figure 2 This is a top view schematic diagram of the overall structure of the front wheel hub cover of the present invention; Figure 3 This is a schematic diagram of the cover cylinder structure in this invention; Figure 4 This is a schematic diagram of the sleeve structure in this invention; Figure 5 This is a schematic diagram of the upper support structure in this invention; Figure 6 This is a schematic diagram showing the position of the third annular groove on the upper support in this invention; Figure 7 This is a schematic diagram of the lower support structure in this invention.

[0020] In the diagram: 1. Cover cylinder, 11. Side plate, 12. Shell wall, 13. Hollow cylinder, 14. Connecting hole, 15. Inner groove, 16. First threaded hole, 17. Second threaded hole, 18. Pin through hole, 2. Sleeve, 21. Bottom plate of cylinder, 22. Cylinder column, 23. First annular groove, 24. Second annular groove, 25. Wire groove, 3. Capacitor board assembly, 4. Coil, 5. Support assembly, 51. Upper support, 52. Lower support, 53. Second through hole, 54. Inner recess, 55. Third annular groove, 56. Slot, 57. Mounting hole, 58. Rivet hole, 6. Frameless coil, 7. Connecting piece assembly; 71. Left connecting piece, 72. Right connecting piece, 8. Rubber pad. Detailed Implementation

[0021] 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.

[0022] An embodiment of the front wheel hub cover for non-contact transmission of tire pressure and energy signals according to the present invention, such as... Figure 1 and Figure 2 As shown, it includes a cover cylinder 1, a sleeve 2, a capacitor plate assembly 3, a coil 4, a bracket assembly 5, a frameless coil 6, a connecting piece assembly 7, and a rubber pad 8. After assembly, it is installed on the aircraft's nose landing gear, enabling contactless monitoring of tire pressure.

[0023] See also Figure 3 The cover cylinder 1 is a rotating shell with an open inner side, and is an integral structure. The cover cylinder 1 includes an outer side plate 11 and a shell wall 12 surrounding the side plate 11, forming an inner cavity. A first through hole is provided at the center of the side plate 11. A hollow cylinder 13 extending into the inner cavity of the shell is provided on the inner side of the side plate 11. The hollow cylinder 13 and the first through hole are coaxial and have the same inner diameter, i.e., the diameter of the first through hole is the same as the inner diameter of the hollow cylinder 13, to ensure that the sleeve 2 can pass through. The outer wall of the hollow cylinder 13 has a 1-2° convergence angle with the axis of the hollow cylinder, converging from one end of the side plate 11 to the other end, to improve the support strength of the hollow cylinder 13 for the sleeve 2 and provide a certain degree of protection for the inner wall of the sleeve 2. A disc-shaped recess coaxial with the first through hole is provided on the outer side of the side plate 11, which is used to mate with the sleeve 2. The edge of the shell wall 12 away from the side plate 11 has four lugs, which are symmetrical in pairs. Each lug has a connecting hole 14 for fixing the cover cylinder 1 and the front wheel bearing housing. The symmetrical arrangement of the four connecting holes 14 prevents errors during installation and ensures that any errors can be detected immediately. When the cover cylinder 1 and the front wheel are installed in place, the outer end face of the cover cylinder 1 is in close contact with the end face of the front wheel bearing housing, providing protection for the front wheel axle and preventing the entry of foreign objects. At the same time, the hollow cylinder 13 passes through the coil frame of the internal adapter on the front landing gear axle. The connecting hole 14 is a through hole, and a corresponding threaded hole is provided on the front wheel to mate with it. The edge of the shell wall 12 also has an inner groove 15 for the connecting piece assembly 7 to pass through.

[0024] See also Figure 4Sleeve 2 is a rotating cylindrical body, comprising a disc-shaped bottom plate 21 and a cylindrical column 22 located at the center of one side of the bottom plate 21. The cylindrical column 22 is a hollow cylinder, open at the end away from the bottom plate 21. The cylindrical column 22 is inserted into the hollow cylinder 13, with its outer wall contacting the inner wall of the hollow cylinder 13. The bottom plate 21 is embedded in the disc-shaped recess on the outer side of the side plate 11 of the cover cylinder 1, and the inner surface of the bottom plate 21 contacts the disc-shaped recess on the outer side of the side plate 11. The bottom plate 21 of sleeve 2 and the side plate 11 of cover cylinder 1 are fixedly connected by screws. Figure 3 , Figure 4 As shown, four first threaded holes 16 are evenly distributed on the side plate 11. Correspondingly, four threaded holes corresponding to the first threaded holes 16 are provided on the bottom plate 21 of the sleeve 2. The sleeve 2 and the cover 1 are fixedly connected by four sets of screws and self-locking nuts. After installation, the outer end face of the bottom plate 21 is flush with the outer end face of the side plate 11.

[0025] The inner side of the bottom plate 21 is provided with a first annular groove 23, which is used to install the capacitor plate assembly 3. The outer diameter wall of the cylinder 22 is provided with a second annular groove 24, which is used to wind the coil 4. The outer wall of the cylinder 22 is provided with a wire passage groove 25, which connects the first annular groove 23 and the second annular groove 24, and is used to lead the end of the coil 4 to the capacitor plate assembly 3.

[0026] The capacitor board assembly 3 is embedded in the first annular groove 23 and is used for signal transmission. The capacitor board assembly 3 includes a capacitor board printed circuit board and capacitors. The capacitors are soldered to the capacitor board printed circuit board and electrically connected to the circuitry of the printed circuit board. The capacitor board printed circuit board has two sets of insertion holes. One set of insertion holes is used for electrical connection to the lead-out coil 4, and the other set of insertion holes is used for soldering a printed circuit board socket assembly, which is electrically connected to the capacitor board assembly 3. The printed circuit board socket assembly is used for electrical connection to one end of the connecting piece assembly 7.

[0027] The coil 4 is wound within the second annular groove 24, with its two ends passing through the wire groove 25 into the first annular groove 23, and electrically connected to a set of two insertion holes of the capacitor board assembly 3 by welding. The coil 4 is used for electromagnetic coupling with the in-spindle adapter on the front landing gear shaft. In this embodiment, the coil 4 has 22±1 turns, a resistance of 0.4±0.1Ω at 20℃, and an inductance of 15±0.2μH.

[0028] like Figure 1 , Figure 5 - Figure 7As shown, the bracket assembly 5 has a second through hole 53 for avoiding the tire pressure sensor. The second through hole 53 is a 25mm diameter through hole, and the tire pressure sensor is located inside the second through hole 53. The bracket assembly 5 is fixed to the front wheel flange boss at the tire pressure sensor mounting location. Specifically, the bracket assembly includes an upper bracket 51 and a lower bracket 52, which are connected and fixed together. Both the upper bracket 51 and the lower bracket 52 have a second through hole 53, and after fixing, the two second through holes 53 are coaxial. Figure 5 As shown, the upper bracket 51 has a recessed portion 54 on the side facing the lower bracket 52. The recessed portion 54 covers the second through hole 53 of the upper bracket. The recessed portion 54 is set to the same depth as the surface of the upper bracket 51. The outer edge of the recessed portion 54 forms a protrusion that contacts the surface of the lower bracket 52. A receiving cavity is formed between the recessed portion 54 and the lower bracket 52. The receiving cavity is used for the bracket assembly 5 to pass through the other end of the connecting piece assembly 7.

[0029] like Figure 5 As shown, the recessed portion 54 is provided with a third annular groove 55, which is coaxial with the second through hole 53 and located around the second through hole 53 of the upper bracket. The third annular groove 55 is used to install the frameless coil 6, which is used for electromagnetic coupling with the tire pressure sensor located in the second through hole 53 of the bracket assembly. Two slots 56 are symmetrically provided near the third annular groove 55 in the recessed portion 54. The slots 56 are connected to the third annular groove 55 and are used to install welding socket assemblies. The welding socket assemblies are electrically connected to the frameless coil 6 in the third annular groove 55 by soldering. The welding socket assemblies are used for electrical connection with the connecting piece assembly 7. One welding socket assembly is installed in each slot 56, and both ends of the frameless coil 6 are electrically connected to a welding socket assembly. In this embodiment, the frameless coil 6 is double-wound, with 12±1 turns per layer, a resistance of 1±0.2Ω at 20℃, and an inductance of 24±0.5μH.

[0030] The upper bracket 51 has two mounting holes 57, and the lower bracket 52 has mounting holes corresponding to the two mounting holes 57. The mounting holes 57 of the upper and lower brackets are used to insert bolts to fix the bracket assembly 5 and the tire pressure boss of the outer half of the front wheel hub.

[0031] One end of the connecting piece assembly 7 is electrically connected to the capacitor plate assembly 3, and the other end is electrically connected to the frameless coil 6. Specifically, as shown... Figure 1As shown, the connecting piece assembly 7 includes two symmetrical connecting pieces, namely a left connecting piece 71 and a right connecting piece 72. One end of the connecting piece is fixedly connected to the inner wall of the side plate 11 of the cover cylinder 1. For each connecting piece, the inner wall of the side plate 11 is provided with two second threaded holes 17, which are fixedly connected by screws. At the same time, a first pin is welded to the connecting end of each connecting piece and the cover cylinder 1. The first pin passes through the corresponding pin through hole 18 on the side plate 11 and is inserted into a corresponding printed circuit board socket assembly on the capacitor board assembly 3 to realize the electrical connection between the connecting piece and the capacitor board assembly 3. The other end of the connecting piece is riveted to the bracket assembly 5. Specifically, the connecting piece assembly 7 is sandwiched in the accommodating cavity formed between the upper bracket 51 and the lower bracket 52. The upper bracket 51, the connecting piece assembly, and the lower bracket 52 are tightly fitted and fixed by riveting. The upper bracket 51 is provided with four rivet holes 58, and correspondingly, the lower bracket 52 is provided with the same four rivet holes. A second pin is welded to the connecting end of the connecting piece and the bracket assembly 5. The second pin is inserted into the welding socket assembly at the corresponding side slot 56 to realize the electrical connection between the connecting piece and the frameless coil 6.

[0032] The connecting piece assembly 7 enters the cover cylinder 1 through the inner groove 15 of the cover cylinder 1. To seal the inner groove 15 and ensure the sealing between the cover cylinder 1 and the end face of the front wheel bearing chamber, a rubber pad 8 is provided here. The rubber pad 8 is placed on the connecting piece assembly 7 at the inner groove 15 on the edge of the shell wall, and the rubber pad 8 is used to seal the gap between the inner groove 15 of the cover cylinder and the end face of the front wheel bearing chamber.

[0033] In this embodiment, the cover 1, sleeve 2, upper bracket 51 and lower bracket 52 are all made of polyetheretherketone material, taking into account both the strength requirements and the need for lightweighting. The connecting piece is made of aluminum alloy material and undergoes chromic acid anodizing surface treatment to meet the environmental adaptability requirements of the aircraft nose landing gear.

[0034] The following steps are used in assembling a front wheel hub cover for non-contact transmission of tire pressure and energy signals according to the present invention: Step 1. First, install the capacitor board assembly 3 into the first annular groove 23 of the base plate of the sleeve 2, and solder the printed circuit board socket assembly to the capacitor board assembly. Then, wind the coil 4 in the second annular groove 24 on the outside of the sleeve 2. After winding, perform an inductance test. After passing the test, solder the coil 4 to the capacitor board assembly 3 and perform short-circuit and open-circuit tests. After passing the test, use Nanda 618 glue to encapsulate the coil 4 and the capacitor board assembly 3.

[0035] Step 2. Assemble the components assembled in Step 1 with the cover sleeve 1, and fix the sleeve 2 and the cover sleeve 1 together with four sets of screws and self-locking nuts.

[0036] Step 3. Solder the frameless coil 6 to the soldering socket assembly. Insert the frameless coil 6 into the third annular groove 55 of the upper bracket 51, install the soldering socket assembly in the slot 56, and encapsulate it with Nanda 618 glue.

[0037] Step 4. Weld two pins to both ends of the two connecting pieces to form connecting piece assembly 7. One end of the connecting piece is tightly fitted to the inner surface of the side plate 11 of the cover cylinder 1, and the pin at this end is inserted into the printed circuit board socket assembly welded on the capacitor board assembly 3. After confirming that the circuit is connected, fasten the cover cylinder 1 and the connecting piece with screws. The other end of the connecting piece is tightly fitted to the surface of the recess 54 of the upper bracket 51, and the pin at this end of the connecting piece is inserted into the welded socket assembly at the slot 56 inside the upper bracket to achieve electrical connection.

[0038] Step 5. Fit the lower bracket 52, connecting piece assembly 7, and upper bracket 51 tightly together and secure them with four rivets.

[0039] This completes the assembly of the front wheel hubcap for non-contact transmission of tire pressure and energy signals.

[0040] During on-machine installation, place the assembled front wheel hubcap on the outer side of the bearing housing end face of the outer half of the front wheel hub. Secure the front cover cylinder 1 and the bearing housing of the outer half of the front wheel hub with four bolts passing through the connecting hole 14 and using washers. At the other end, align the upper bracket 51 with the surface of the tire pressure sensor mount (i.e., the mount where the tire pressure sensor is installed) on the front wheel rim. Secure the bracket assembly 5 and the tire pressure sensor mount on the front wheel rim with two bolts passing through the mounting hole 57 and using washers. After confirming that the assembly is correct, use safety pliers to apply the fuse.

[0041] During operation, coil 4, capacitor plate assembly 3, connecting piece assembly 7, and frameless coil 6 form a closed loop, enabling the in-axle adapter, the front wheel hub cover of this invention, and the tire pressure sensor to form an RLC series resonant circuit. Coil 4 receives the energy signal provided by the in-axle adapter, which is then transmitted through capacitor plate assembly 3, connecting piece assembly 7, and frameless coil 6 to power the tire pressure sensor. Subsequently, frameless coil 6 receives the tire pressure signal transmitted by the tire pressure sensor, which is then transmitted through connecting piece assembly 7, capacitor plate assembly 3, and coil 4 to the in-axle adapter, and then from the in-axle adapter to the tire pressure indicator board, thus realizing non-contact transmission of tire pressure and energy signals.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A front wheel hub cover for non-contact transmission of tire pressure and energy signals, characterized in that, include: The cover cylinder is a rotating shell, which includes a side plate and a shell wall around the side plate, which together form an inner cavity of the shell. A first through hole is provided in the center of the side plate, and a hollow cylinder extending into the inner cavity of the shell is provided on the inner side of the side plate. The hollow cylinder and the first through hole are coaxial and have the same inner diameter. The sleeve is a rotating cylinder, which includes a bottom plate and a cylinder column located at the center of one side of the bottom plate. The cylinder column is inserted into the hollow cylinder. The inner side of the bottom plate contacts and is fixedly connected to the outer side of the side plate. The inner side of the bottom plate is provided with a first annular groove, and the outer diameter wall of the cylinder column is provided with a second annular groove. A capacitor plate assembly is embedded in a first annular groove and is used for signal transmission; The coil is wound in the second annular groove, and its two ends are electrically connected to the capacitor plate assembly. The coil is used for electromagnetic coupling with the in-shaft adapter mounted on the front landing gear shaft. A bracket assembly having a second through-hole for accommodating a tire pressure sensor; The frameless coil, which is installed within the bracket assembly, is used for electromagnetic coupling with the tire pressure sensor. And the connecting piece assembly, one end of which is electrically connected to the capacitor plate assembly and the other end of which is electrically connected to the frameless coil; The outer end of the shell wall is fixedly connected to the front wheel. The hollow cylinder is inserted into the internal adapter on the front landing gear shaft. The bracket assembly is fixed to the wheel flange boss on which the tire pressure sensor is installed. The tire pressure sensor is located in the second through hole. The energy signal provided by the internal adapter is received through the coil to power the tire pressure sensor. The tire pressure signal of the tire pressure sensor is received through the frameless coil and transmitted to the internal adapter.

2. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 1, characterized in that, The capacitor board assembly includes a capacitor board printed circuit board and a capacitor, with the capacitor soldered onto the capacitor board printed circuit board. The capacitor board printed circuit board has two sets of insertion holes, one set of insertion holes for electrical connection with the coil, and the other set of insertion holes for soldering the printed circuit board socket assembly. The printed circuit board socket assembly is used for electrical connection with the connecting piece assembly.

3. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 1, characterized in that, The support assembly includes an upper support and a lower support, which are fixed together. Both the upper and lower supports have a second through hole, which is coaxial after fixing. The upper support has a concave portion on the side facing the lower support, which covers the second through hole of the upper support. The outer edge of the concave portion forms a protrusion that contacts the surface of the lower support. A receiving cavity is formed between the concave portion and the lower support, which is used to insert one end of the connecting piece assembly. The concave portion has a third annular groove, which is coaxial with the second through hole and located outside the second through hole of the upper support. The frameless coil is installed in the third annular groove.

4. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 3, characterized in that, Two slots are symmetrically provided near the third annular groove in the concave part. The slots are connected to the third annular groove and are used to install the welding socket assembly. The welding socket assembly is electrically connected to the frameless coil in the third annular groove by soldering. The welding socket assembly is used to electrically connect with the connecting piece assembly.

5. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 4, characterized in that, The connecting piece assembly includes two symmetrical connecting pieces. One end of the connecting piece is fixedly connected to the inner wall of the side plate of the cover cylinder, and a first pin is welded to this end. The first pin passes through the corresponding through hole on the side plate and is inserted into the printed circuit board socket assembly on the capacitor board assembly. The other end of the connecting piece is fixedly connected to the bracket assembly, and a second pin is welded to this end. The second pin is inserted into the welding socket assembly at the slot.

6. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 3, characterized in that, The upper bracket, connecting piece, and lower bracket fit together tightly and are fixed by riveting.

7. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 1, characterized in that, The coil has 22±1 turns, a resistance of 0.4±0.1Ω and an inductance of 15±0.2μH at 20℃; the frameless coil is double-wound, with 12±1 turns per layer, a resistance of 1±0.2Ω and an inductance of 24±0.5μH at 20℃.

8. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 1, characterized in that, The shell wall has four lugs on the edge away from the side plate. The four lugs are symmetrical in pairs. Each lug has a connecting hole for connecting with the front wheel. The shell wall edge has an inner groove for the connecting piece assembly to pass through.

9. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 8, characterized in that, It also includes a rubber pad, which is placed on the connecting piece assembly at the inner groove of the shell wall edge. The rubber pad is used to seal the gap between the inner groove of the cover tube and the surface on which the cover tube is to be installed.

10. The front wheel hub cover for non-contact transmission of tire pressure and energy signals according to claim 1, characterized in that, The outer wall of the cylinder is provided with a wire passage groove, which connects the first annular groove and the second annular groove. The wire passage groove is used to lead the end of the coil to the capacitor plate assembly.

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