Main landing gear rotary joint shaft combination disassembling device

Abstract

The utility model relates to the technical field of aircraft main landing gear repair, in particular to a main landing gear rotary joint shaft assembly and disassembly device which comprises a connecting rod, a threaded rod portion located on the left side and a polished rod portion located on the right side. The handle is in threaded connection with the threaded rod part; the connecting rod penetrates through the sleeve; and the conical blanking cap is in threaded connection with the right end of the polished rod part through a gasket and a nut, is used for being attached to a conical surface on a rotating joint shaft, and is matched with the threaded motion of the handle to enable the connecting rod to drive the rotating joint shaft to move in the opposite direction and enable the rotating joint to enter the sleeve, so that the rotating joint shaft is decomposed. Efficient decomposition of the adapter shaft is achieved through threaded movement of the connecting rod, the problem that a product is damaged due to the fact that a knocking method is used at present is solved, damage to a hydraulic guide pipe is effectively avoided, the requirement for removing a tire is omitted, and the device has the remarkable effect on improvement of decomposition efficiency and protection of product quality.

Description

Technical Field

[0001] This utility model relates to the field of aircraft main landing gear repair technology, specifically a main landing gear rotary joint shaft assembly and disassembly device. Background Technology

[0002] The main landing gear rotary joint is used to transmit braking pressure, enabling functions such as anti-skid braking, takeoff line braking, and wheel braking after landing gear retraction. This ensures normal takeoff and landing, as well as aborting takeoff in abnormal situations, and has a significant impact on aircraft safety. The rotary joint is fixed to the lugs on the outer cylinder and piston rod of the main landing gear via a rotary joint shaft with an outer diameter of Φ50mm, and is connected to the wheel braking system through hydraulic conduits to transmit braking pressure.

[0003] The rotary joint is mounted on the main landing gear via a rotary joint shaft. During routine maintenance, the internal seals of the rotary joint may need to be replaced. This requires removing the rotary joint from the main landing gear. The only way to remove the rotary joint is to pull the rotary joint shaft out of the lug hole in the outer cylinder or piston rod. Currently, the rotary joint shaft is removed by striking it with a rubber hammer and a copper rod. This method requires removing the tires to provide space for striking and repositioning the guide tubes around the rotary joint to avoid damage during striking. Therefore, this method is inefficient and carries the risk of damaging parts. Thus, developing a disassembly and reassembly device for the main landing gear rotary joint shaft that does not require removing the wheels and avoids damaging parts is essential. Utility Model Content

[0004] To address the aforementioned technical problems, this invention proposes a main landing gear rotary joint shaft assembly and disassembly device. By using threaded motion, the rotary joint shaft moves from the lug hole of the main landing gear, thereby separating the rotary joint shaft from the product. This replaces the current method of disassembly by hammering, avoiding damage to the product and reducing operational intensity, thus improving maintenance quality and efficiency.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] A main landing gear rotary joint shaft assembly and disassembly device, comprising:

[0007] The connecting rod includes a threaded rod portion on the left and a smooth rod portion on the right, the smooth rod portion being used to pass through a through hole in the middle of the rotary joint shaft;

[0008] The handle is threadedly connected to the threaded rod portion;

[0009] A sleeve through which the connecting rod passes, one end of which is in close contact with the handle, and the other end of which is in close contact with the lug end face of the main landing gear mounting rotary joint shaft;

[0010] A conical plug is threadedly connected to the right end of the smooth rod via a gasket and a nut. It is used to fit against the conical surface on the rotary joint shaft. The threaded movement of the handle causes the connecting rod to move the rotary joint shaft in the opposite direction and the rotary joint to enter the sleeve, thereby disassembling the rotary joint shaft.

[0011] As a further improvement of this utility model, the middle part of the handle is provided with a threaded hole that is threaded to the threaded rod. The thread size of the threaded rod and the threaded hole are the same, both being M20×2.5.

[0012] As a further improvement of this utility model, a clamping part is provided at the left end of the threaded rod to cooperate with and hold an open-end wrench.

[0013] As a further improvement of this utility model, a threaded connection part that mates with the tapered plug is provided at the right end of the smooth rod. The length of the threaded connection part is 40mm and the thread size is M8×1.25.

[0014] As a further improvement of this utility model, the diameter of the smooth rod portion is Φ8mm.

[0015] As a further improvement of this utility model, the handle, sleeve, connecting rod, conical plug gasket and nut are all made of 45# steel.

[0016] As a further improvement of this utility model, the outer diameter of the handle and the sleeve are the same, both being Φ52mm, and the inner diameter of the sleeve is Φ50mm.

[0017] As a further improvement of this utility model, the included angle of the hypotenuse of the conical plug is 52°.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a main landing gear rotary joint shaft assembly disassembly device, which achieves efficient disassembly of the joint shaft through threaded movement of a connecting rod. This solves the problem of product damage caused by the current method of hammering, and effectively avoids damage to hydraulic conduits and eliminates the requirement to remove tires. It has a significant effect on improving disassembly efficiency and protecting product quality. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the handle structure in this utility model;

[0023] Figure 3 This is a schematic diagram of the connecting rod structure in this utility model;

[0024] Figure 4 This is a schematic diagram of the conical plug structure in this utility model.

[0025] In the diagram: 1. Handle; 11. Threaded hole; 2. Sleeve; 3. Connecting rod; 31. Threaded rod part; 32. Plain rod part; 33. Clamping part; 34. Threaded connection part; 4. Conical plug; 5. Washer; 6. Nut. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, a main landing gear rotary joint shaft assembly disassembly device mainly includes a handle 1, a sleeve 2, a connecting rod 3, a conical plug 4, a washer 5, and a nut 6. The handle 1 is tightly attached to one end of the sleeve 2, the connecting rod 3 passes through the sleeve 2 and is threadedly connected to the handle 1, the conical plug 4 is threadedly connected to one end of the connecting rod 3, and is fastened to the nut 6 by the washer 5.

[0028] Furthermore, such as Figure 2 The diagram shows the structure of the handle 1. The handle 1 is made of 45# steel. The middle part of the handle 1 is provided with a threaded hole 11 of M20×2.5. The threaded hole 11 is used to engage with the connecting rod 3 by threading, so that the rotary joint shaft can be disassembled by the threaded movement.

[0029] Furthermore, the sleeve 2 is made of 45# steel with an inner diameter of Φ50mm. It is sleeved and installed on the connecting rod 3 with an outer diameter of Φ52mm, which is consistent with the outer diameter of the handle 1. When the threaded hole 11 on the handle 1 moves with the external thread of the connecting rod 3, one end of the sleeve 2 is close to the handle 1, and the other end is close to the end face of the lug hole of the main landing gear mounting rotary joint shaft. Through the limiting action, the puller effect is achieved, so that the rotary joint shaft is disassembled from the lug hole and enters the Φ50mm inner hole of the sleeve 2.

[0030] Furthermore, such as Figure 3The diagram shows the structure of the connecting rod 3, which is made of 45# steel. The connecting rod 3 includes a threaded rod portion 31 on the left, a smooth rod portion 32 on the right, a clamping portion 33 at the left end of the threaded rod portion 31, and a threaded connection portion 34 at the right end of the smooth rod portion 32. The clamping portion 33 has a hexagonal structure and is used to clamp the connecting rod 3 during disassembly using an open-end wrench to prevent rotation. The threaded rod 31 has a thread size of M20×2.5 and mates with the threaded hole 11 to achieve threaded movement. The smooth rod portion 32 has a diameter of Φ8mm and passes through the through hole in the middle of the rotary joint shaft. The threaded connection portion 34 has a length of 40mm and a thread size of M8×1.25, and is fixedly connected to the rotary joint shaft via a conical plug 4, a washer 5, and a nut 6.

[0031] Furthermore, such as Figure 4 The diagram shows the structure of the conical plug 4. The conical plug 4 is made of 45# steel, and the included angle of the inclined side is 52°, which is consistent with the conical surface angle of the rotary joint shaft. The conical plug 4 is screwed into the threaded connection part 34 through the M8×1.25 internal thread, so that the conical plug 4 and the rotary joint shaft can fit together.

[0032] Furthermore, both the gasket 5 and the nut 6 are made of 45# steel and are used to tighten the conical plug 4 together with the rotary joint shaft onto the threaded connection 34 to prevent the conical plug 4 from loosening during disassembly.

[0033] Working principle and usage process of this utility model:

[0034] In use, first, sleeve 2 is fitted onto the threaded rod 31 of connecting rod 3. Then, handle 1 is threaded onto the threaded rod 31. Next, the smooth rod 32 of connecting rod 3 is passed through the through hole of the rotary joint shaft, and a conical plug 4 is installed on the protruding end using a washer 5 and a nut 6, so that the conical plug 4 is limited to the rotary joint shaft. Then, an open-end wrench is used to clamp the clamping part 33 of connecting rod 3, and the handle 1 is used to perform threaded movement on the threaded rod 31 in the tightening direction. Due to the limiting effect of sleeve 2, handle 1 cannot move in the tightening direction. According to the puller effect, the smooth rod 32, together with the conical plug 4, moves the rotary joint shaft in the opposite direction and causes the rotary joint shaft to enter the sleeve 2, thus realizing the disassembly of the rotary joint shaft.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A disassembly and reassembly device for the main landing gear rotary joint shaft, characterized in that: include: The connecting rod (3) includes a threaded rod portion (31) on the left and a smooth rod portion (32) on the right, the smooth rod portion (32) being used to pass through a through hole in the middle of the rotary joint shaft; The handle (1) is threaded onto the threaded rod (31); Sleeve (2), the connecting rod (3) passes through the sleeve (2), one end of the sleeve (2) is in close contact with the handle (1), and the other end is in close contact with the end face of the lug hole of the main landing gear mounting rotary joint shaft; The conical plug (4) is threaded to the right end of the smooth rod (32) via a gasket (5) and a nut (6) to fit against the conical surface on the rotary joint shaft. The threaded movement of the handle (1) causes the connecting rod (3) to move the rotary joint shaft in the opposite direction and the rotary joint to enter the sleeve (2), thereby disassembling the rotary joint shaft.

2. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The handle (1) has a threaded hole (11) in the middle that is threaded to the threaded rod (31). The thread size of the threaded rod (31) and the threaded hole (11) are the same, both being M20×2.

5.

3. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The left end of the threaded rod (31) is provided with a clamping part (33) that cooperates with an open-end wrench for clamping.

4. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The right end of the bare rod (32) is provided with a threaded connection part (34) that is threaded to the tapered plug (4). The threaded connection part (34) has a length of 40mm and a thread size of M8×1.

25.

5. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The diameter of the smooth rod portion (32) is Φ8mm.

6. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The handle (1), sleeve (2), connecting rod (3), conical plug (4), gasket (5), and nut (6) are all made of 45# steel.

7. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The outer diameter of the handle (1) and the sleeve (2) are the same, both being Φ52mm, and the inner diameter of the sleeve (2) is Φ50mm.

8. The main landing gear rotary joint shaft assembly and disassembly device according to claim 1, characterized in that: The included angle of the hypotenuse of the conical plug (4) is 52°.

Images