Inflation and deflation device for aviation aircraft wheel

Abstract

According to the inflation and deflation device for the aviation aircraft wheel, the interior of a main body is a cavity, and gas circulates through the cavity; the sleeve is installed in the inner cavity of the main body and enables the main body and the lifting pin to be sealed. And the main body is connected with the lifting pin through a nut. The lifting pin is fixed on the nut, and the valve core is ejected by the tip of the lifting pin by screwing the lifting pin, so that the inner cavity of the tire is communicated with the inflating and deflating device. And the main body is connected with the nozzle through a nut. And a cavity for the lifting pin to move back and forth and gas to circulate is formed in the connecting nozzle. The apex part of the lifting pin is of a slender cylindrical structure, the apex points to an airplane wheel assembly inflating valve, the apex can be jacked into the inflating valve to jack a valve core open, the lifting pin is screwed to achieve airplane tire inflation operation, inflation and deflation operation of an aviation airplane wheel can be achieved remotely, the structure is simple, operation is convenient and fast, safety is high, inflation / deflation can be completed, and safety is high. The inflation and deflation efficiency reaches 98%, and the high application value is achieved.

Description

Technical Field

[0001] This invention relates to the field of aircraft tire inflation and deflation technology, specifically a device for inflating and deflating aircraft tires. Technical Background

[0002] Aircraft wheels typically consist of a wheel assembly and a tire, used to bear ground loads and cushion impacts and vibrations generated during taxiing. Traditionally, aircraft tires are inflated via valves on the wheel assembly. When inflating an aircraft tire, the valve core inside the valve must first be pushed downwards to ensure connection between the tire and the high-pressure gas cylinder. After inflation, the valve core is returned to its original position to ensure a tight seal. However, due to the high inflation pressure, it is impossible to directly remove the valve to deflate an aircraft tire.

[0003] Traditional inflation methods involve manually opening the valve core with a hand-held pin to release air. This is inefficient, time-consuming, and has severely impacted work productivity. Furthermore, this traditional manual inflation method poses safety hazards; under high pressure, any accident could directly threaten the life and health of the operator. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, such as low inflation and deflation efficiency and high safety hazards of aircraft tires, this invention proposes an inflation and deflation device for aircraft wheels.

[0005] This invention includes a top pin, a sleeve, a main body, a nut, and a connector. The connector is fitted onto one end of the top pin, with a 0.3-0.5 mm gap between the inner circumferential surface of the connector and the outer circumferential surface of the top pin, forming a connection channel between the aircraft tire and the air source. The main body is fitted onto the other end of the top pin, with their adjacent end faces in contact; the 0.3-0.5 mm gap between the inner circumferential surface of the main body and the outer circumferential surface of the top pin forms an airflow channel during inflation.

[0006] The sleeve is also fitted onto the top pin, with the outer end face of the closed end of the sleeve contacting the stepped end face of the inner hole of the main body, and the end face of the open end of the sleeve being flush with the end face of the main body; a sealing ring is installed between the closed end of the sleeve and the top pin. The nut is fitted onto the outer circumferential surface of the sleeve, with the inner surface of the open end of the nut being threaded to the outer surface of the main body, and the inner surface of the closed end of the nut being threaded to the top pin; the end face of the open end of the sleeve is flush with the end face of the open end of the main body.

[0007] A washer is fitted onto the top pin, with the inner end face of the washer fitting against the end face of the body and sleeve flush with each other, and the outer end face fitting against the inner end face of the nut's closed end.

[0008] The main body is a constant-diameter tee pipe; one end of the main pipe is connected to a connector via a nut, which in turn connects to the valve assembly on the aircraft wheel; the other end of the main pipe is connected to a nut and a top pin. The branch pipe in the tee pipe is connected to an external high-pressure air pipe via a threaded surface, thereby connecting to the air source.

[0009] The circumferential surface of the top pin is a four-step structure, wherein: the diameter of the first step is 3mm; the diameter of the second step is 0.2 to 0.5mm smaller than the inner diameter of the connector; the diameter of the third step is 0.2 to 0.5mm smaller than the inner diameter of the body; and the surface of the fourth step has threads for connecting the nut.

[0010] The nut is sleeve-shaped with a stepped inner hole. The larger diameter section is threaded to the outer circumferential surface of the open end of the main body, and the smaller diameter section is threaded to the outer circumferential surface of the top pin.

[0011] The nut is sleeve-shaped with a stepped inner hole. The diameter of the small-diameter section is the same as the outer diameter of the connector, and the inner surface of the large-diameter section is a threaded surface that connects to the main body.

[0012] The connector is sleeve-shaped, with threads on the inner circumferential surface of one end for connection with the aircraft wheel valve assembly, and a radially protruding positioning step on the outer circumferential surface of the other end; the outer diameter of the positioning step is the same as the inner diameter of the large-diameter section of the nut. The opening at the end of the connector with the positioning step is an outwardly flared bevel, the angle and axial length of which are adapted to the mounting surface of the outer end face of the main body pipe, ensuring a tight seal at that point through a conical seal.

[0013] This invention enables aircraft tire inflation by turning the top pin, improving the efficiency of aircraft inflation and deflation, and allowing for remote inflation and deflation of aircraft tires.

[0014] This invention has a simple structure, is convenient and quick to operate, and is highly safe. It can not only achieve the purpose of inflation, but also meet the requirements of deflation. Therefore, it has high utilization value and greatly improves the shortcomings of the existing technology, such as low inflation and deflation efficiency and high safety hazards of aircraft tires.

[0015] This invention enables long-distance operation, and due to the presence of the nozzle device, it can better fit and match the valve of the wheel assembly. Statistics show that traditional handheld inflation / deflation methods have low efficiency, reaching only 80%, while the inflation / deflation device of this invention achieves an efficiency of up to 98%, enabling inflation / deflation operations to be performed effectively while ensuring operator safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 yes Figure 1 A magnified view of part I in the middle section, with arrows indicating the direction of airflow.

[0018] Figure 3 This is a schematic diagram of the top pin structure.

[0019] Figure 4 This is a schematic diagram of the nut structure.

[0020] Figure 5 This is a schematic diagram of the main structure.

[0021] Figure 6 This is a schematic diagram of the nut's structure.

[0022] Figure 7 This is a schematic diagram of the connector structure.

[0023] In the diagram: 1. Top pin; 2. Washer; 3. Sleeve; 4. Nut; 5. Sealing ring; 6. Body; 7. Nut; 8. Connector. Detailed Implementation

[0024] This embodiment is an aircraft tire inflation / deflation device, including a top pin 1, a washer 2, a sleeve 3, a main body 6, a nut 7, and a connector 8. The connector 8 is fitted onto one end of the top pin, with a 0.3-0.5mm gap between its inner circumferential surface and the outer circumferential surface of the top pin, forming a connection channel between the aircraft tire and the air source. The main body 6 is fitted onto the other end of the top pin, with their adjacent end faces in contact; the 0.3-0.5mm gap between the inner circumferential surface of the main body and the outer circumferential surface of the top pin ensures gas flow during inflation. The sleeve 3 is also fitted onto the top pin, with its closed end face contacting the stepped end face of the inner hole of the main body, making the open end face of the sleeve flush with the end face of the main body; a sealing ring 5 is installed between the closed end of the sleeve and the top pin. The nut 4 is fitted onto the outer circumferential surface of the sleeve, and the inner surface of the open end of the nut 4 is threaded to the outer surface of the main body, and the inner surface of the closed end of the nut is threaded to the top pin; the end face of the open end of the sleeve 3 is flush with the end face of the open end of the main body 6.

[0025] The washer 2 is fitted onto the top pin, with its inner end face fitting against the end face of the body and sleeve that are flush with each other, and its outer end face fitting against the inner end face of the closed end of the nut 4.

[0026] The main body 6 is a constant diameter tee pipe, with one end of the main pipe having a threaded surface, which connects to a connector via a nut 7, and then to the valve assembly on the aircraft wheel via the connector. The other end also has a threaded surface, used to connect to a nut 4 and a top pin, while a washer provides a sealing function to ensure the seal at this end when the top pin is tightened. The branch pipe connects to an external high-pressure air pipe via a threaded surface, thus connecting to the air source.

[0027] The circumferential surface of the top pin 1 is a four-step structure, wherein: the diameter of the first step is 3mm; the diameter of the second step is 0.2 to 0.5mm smaller than the inner diameter of the connector 8; the diameter of the third step is 0.2 to 0.5mm smaller than the inner diameter of the body 6; and the surface of the fourth step has threads for connecting the nut 4.

[0028] The nut 4 is sleeve-shaped with a stepped inner hole. The large-diameter section is threaded to the outer circumferential surface of the open end of the main body 4, and the small-diameter section is threaded to the outer circumferential surface of the top pin 1.

[0029] The nut 7 is sleeve-shaped with a stepped inner hole. The diameter of the small-diameter section is the same as the outer diameter of the connector 8, and the inner surface of the large-diameter section is a threaded surface that connects to the main body.

[0030] The connector 8 is sleeve-shaped, with threads on the inner circumferential surface of one end for connection with the aircraft wheel valve assembly, and a radially protruding positioning step on the outer circumferential surface of the other end; the outer diameter of the positioning step is the same as the inner diameter of the large-diameter section of the nut. The opening at the end of the connector with the positioning step is an outwardly flared slope, the angle and axial length of which are adapted to the mounting surface of the outer end face of the main body 6, and a conical seal ensures the sealing performance at that point.

[0031] In use, install the inflation / deflation device onto the valve on the wheel assembly. Rotate the top pin in the inflation / deflation device to open the valve core on the wheel assembly, connecting the tire to the inner cavity of the device. After opening the high-pressure gas cylinder valve, inflate the wheel assembly with the tire using compressed air at a certain pressure. Then, reverse the top pin in the inflation / deflation device to reset the valve core. Release the residual pressure in the pipeline, close the high-pressure gas cylinder valve, disconnect the pipeline connection between the inflation nozzle and the test bench, and then unscrew the inflation / deflation device from the product valve.

Claims

1. A device for inflating and deflating aircraft wheels, characterized in that, It includes a top pin (1), a sleeve (3), a main body (6), a nut (7), and a connector (8); wherein: the connector is fitted onto one end of the top pin, and there is a gap of 0.3 to 0.5 mm between the inner circumferential surface of the connector and the outer circumferential surface of the top pin, forming a connection channel between the aircraft tire and the air source; the main body is fitted onto the other end of the top pin, and the adjacent end faces of the two are in contact; there is a gap of 0.3 to 0.5 mm between the inner circumferential surface of the main body and the outer circumferential surface of the top pin, forming an airflow channel during inflation; The sleeve (3) is also fitted onto the top pin, and the outer end face of the closed end of the sleeve contacts the stepped end face of the inner hole of the main body, so that the end face of the open end of the sleeve is flush with the end face of the main body; a sealing ring (5) is installed between the closed end of the sleeve and the top pin; the nut (4) is fitted onto the outer circumferential surface of the sleeve, and the inner surface of the open end of the nut (4) is threaded to the outer surface of the main body, so that the inner surface of the closed end of the nut is threaded to the top pin; the end face of the open end of the sleeve is flush with the end face of the open end of the main body (6).

2. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, A washer (2) is fitted on the top pin, and the inner end face of the washer is in contact with the end face of the body (6) and sleeve (3) at the same level, and the outer end face is in contact with the inner end face of the closed end of the nut (4).

3. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, The main body (6) is a tee pipe of equal diameter; one end of the main pipe of the tee pipe is connected to the nozzle through the nut (7), and then connected to the valve assembly on the aircraft wheel through the nozzle; the other end of the main pipe is connected to the nut (4) and the top pin; the branch pipe of the tee pipe is connected to the external high-pressure air pipe through the threaded surface, and then connected to the air source.

4. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, The circumferential surface of the top pin (1) is a four-step structure, wherein: the diameter of the first step is 3mm; the diameter of the second step is 0.2 to 0.5mm smaller than the inner diameter of the connector (8); the diameter of the third step is 0.2 to 0.5mm smaller than the inner diameter of the body (6); and the surface of the fourth step has threads for connecting the nut (4).

5. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, The nut (4) is sleeve-shaped with a stepped inner hole. The large-diameter section is threaded to the outer circumferential surface of the open end of the main body, and the small-diameter section is threaded to the outer circumferential surface of the top pin (1).

6. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, The nut (7) is sleeve-shaped with a stepped inner hole. The diameter of the small-diameter section is the same as the outer diameter of the connector (8), and the inner surface of the large-diameter section is a threaded surface that connects to the main body.

7. The inflation / deflation device for aircraft wheels as described in claim 1, characterized in that, The connector (8) is sleeve-shaped, with a thread on the inner circumferential surface of one end for connecting with the aircraft wheel valve assembly, and a radially protruding positioning step on the outer circumferential surface of the other end; the outer diameter of the positioning step is the same as the inner diameter of the large diameter section of the nut; the opening of the connector with the positioning step is an outwardly flared inclined surface, the angle and axial length of which are adapted to the mounting surface of the outer end face of the main body (6), and the sealing performance is ensured by the conical sealing.

Images