Three-axis position-adjustable landing gear uplock pin fixing base device

Abstract

The invention discloses a three-axis position-adjustable landing gear uplock pin fixing base device. The upper lock pin is rigidly connected with the upper lock pin seat, the mounting ring is rigidly connected with the upper lock pin seat pressing plate, and the tooth-shaped plate is arranged between the upper lock pin seat platform and the upper lock pin seat pressing plate; by adjusting the relative meshing position of the tooth-shaped plate and the upper lock pin seat pressing plate, the relative position of the upper lock pin seat and the mounting ring in the X direction is changed; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the first adjusting gaskets clamped between the upper lock pin seat and the mounting ring; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the second adjusting gaskets clamped between the upper lock pin seat and the mounting ring. Therefore, the locking reliability of the undercarriage is improved, and the defects that the position of a traditional undercarriage uplock pin fixing and mounting device can only be adjusted in two directions, and the position of the uplock pin of the undercarriage cannot be accurately adjusted are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of landing gears, in particular to a landing gear upper lock pin fixing base device with adjustable three-axis positions. Background Art

[0002] The function of the landing gear upper lock is to fix the landing gear strut in the retracted position and bear the landing gear mass load of the aircraft under various flight conditions. Some aircraft have greater acceleration, longer vibration duration, and higher vibration levels, which puts higher requirements on the reliable locking of the upper lock. It is required that the installation position of the landing gear upper lock pin can be properly adjusted in the three directions of XYZ to compensate for the deformation of design, process and use, and ensure the reliability of the locking between the landing gear upper lock and the lock pin.

[0003] At present, the most widely used landing gear upper lock structure is the hook-and-ring upper lock. The upper lock mechanism rigidly connected to the aircraft cabin has a lock hook that can be opened and closed. An upper lock pin is installed on the landing gear structure. The upper lock pin is aligned with the upper lock hook along the landing gear retraction movement trajectory and is hooked by the lock hook as the landing gear is retracted. When the landing gear is in the retracted state, the landing gear upper lock remains locked to ensure that the spatial position of the landing gear in the aircraft cabin is stable when the aircraft is overloaded in all directions; during the landing stage of the aircraft, the landing gear upper lock needs to be opened before lowering the landing gear, the upper lock hook moves and releases the upper lock pin, and after the upper lock pin is out of the lock hook, the landing gear enters the upper lock unlocked state and begins to unfold.

[0004] In view of the more severe vibration conditions of the landing gear, the installation position of the upper locking pin of the landing gear needs to be adjusted in three directions: XYZ. Summary of the invention

[0005] The present invention provides a landing gear upper lock pin fixing base device with adjustable three-axis position, which serves as compensation for design, process and use deformation, improves the reliability of landing gear locking, and solves the defect that the traditional landing gear upper lock pin fixing installation device can only achieve position adjustment in two directions and cannot accurately adjust the position of the landing gear upper lock pin.

[0006] In a first aspect, a landing gear upper lock pin fixing base device with adjustable three-axis position is provided, comprising an upper lock pin, an upper lock pin seat, a mounting ring, a second adjustment shim, a toothed plate, a shim bracket, a first adjustment shim, and an upper lock pin seat pressure plate;

[0007] The upper lock pin and the upper lock pin seat are rigidly connected, the mounting ring and the upper lock pin seat pressure plate are rigidly connected, the upper lock pin seat includes a pin seat platform, the pin seat platform is located between the upper lock pin seat pressure plate and the mounting ring, and the pin seat platform is parallel to the XZ plane;

[0008] The toothed plate is arranged between the upper lock pin seat pin seat platform and the upper lock pin seat pressure plate, and is fixed relative to the upper lock pin seat pin seat platform in the X direction; the upper lock pin seat pressure plate has a first tooth structure on the side facing the toothed plate, and the toothed plate has a second tooth structure on the side facing the upper lock pin seat pressure plate; the first tooth structure and the second tooth structure are meshed with each other; the tooth units of the first tooth structure and the tooth units of the second tooth structure both extend in the Z direction, and a plurality of tooth units are arranged in the X direction; the relative positions of the upper lock pin seat and the mounting ring in the X direction are changed by adjusting the relative meshing positions of the first tooth structure and the second tooth structure;

[0009] By adjusting the number of first adjustment washers sandwiched between the upper lock pin seat and the mounting ring, the first adjustment washers are perpendicular to the Y direction, and the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed;

[0010] By adjusting the number of second adjustment gaskets sandwiched between the upper lock pin seat and the mounting ring, the second adjustment gaskets are perpendicular to the Z direction, and the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the upper lock pin seat and the toothed plate are fixed in the X direction through a tenon structure; wherein the pin seat platform of the upper lock pin seat has two slots, and the two slots are arranged on both sides of the pin seat platform of the upper lock pin seat along the X direction; the toothed plate has two protrusions, and the two protrusions are arranged on both sides of the toothed plate along the X direction; the two protrusions of the toothed plate are respectively inserted into the two slots of the upper lock pin seat.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the upper locking pin seat also includes two pin seat arms located on both sides of the pin seat platform; the pin seat arms are parallel to the XY plane; the two pin seat arms have through holes on the side away from the pin seat platform; the upper locking pin is aligned with the through holes on the two pin seat arms of the upper locking pin seat, and passes through the locking pin fixing bolt to achieve a rigid connection between the upper locking pin and the upper locking pin seat in three directions of XYZ.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the upper lock pin seat pressure plate is in an I-shape, including a center beam and two protruding beams arranged on both sides of the center beam; the upper lock pin seat pressure plate passes through the upper lock pin seat, so that the center beam of the upper lock pin seat pressure plate is located above the upper lock pin seat, and the two pin seat arms of the upper lock pin seat are both sandwiched between the two protruding beams on both sides of the center beam of the lock pin seat pressure plate;

[0014] The mounting ring includes an annular body and two top connecting arms; the two top connecting arms are both located above the annular body, and between the two top connecting arms, the annular body forms a mounting platform relatively parallel to the upper locking pin seat platform;

[0015] The center beam of the upper lock pin seat pressure plate has a through hole, and the through hole of the center beam of the upper lock pin seat pressure plate is arranged opposite to the through hole of the top connecting arm of the mounting ring, and is arranged opposite to the through hole of the upper lock pin seat pin seat arm close to the pin seat platform; by passing through the lock pin seat fixing bolt, the upper lock pin seat pressure plate and the mounting ring are rigidly connected in three directions of XYZ; wherein, the upper lock pin seat pin seat arm is clamped between the center beam of the upper lock pin seat pressure plate and the top connecting arm of the mounting ring; the upper lock pin seat pin seat platform is clamped between the center beam of the upper lock pin seat pressure plate and the mounting platform of the mounting ring.

[0016] In combination with the first aspect, in certain implementations of the first aspect, in the Y direction, a first adjustment gasket is arranged between the upper lock pin seat pin seat platform and the upper lock pin seat pressure plate center beam, and between the upper lock pin seat pin seat platform and the mounting ring mounting platform; the total number of the first adjustment gaskets is fixed; and the distance between the upper lock pin seat and the mounting ring in the Y direction is adjusted by adjusting the number of the first adjustment gaskets between the upper lock pin seat pin seat platform and the mounting ring mounting platform.

[0017] In combination with the first aspect, in certain implementations of the first aspect, a gasket bracket is provided on the side of the mounting platform of the mounting ring facing the upper lock pin seat platform; the mounting ring is in contact with the gasket bracket in the Y direction; the upper lock pin seat platform is located between the toothed plate and the gasket bracket; the position of the upper lock pin seat and the mounting ring in the Y-axis direction is adjusted by increasing or decreasing the number of first adjusting gaskets between the toothed plate and the upper lock pin seat, and between the gasket bracket and the upper lock pin seat, thereby achieving position adjustment of the upper lock pin and the mounting ring in the Y-axis direction; the center beam of the upper lock pin seat pressure plate presses the upper lock pin seat, the toothed plate and the gasket bracket to the mounting ring through the first adjusting gasket.

[0018] In combination with the first aspect, in certain implementations of the first aspect, in the Z direction, a second adjustment gasket is arranged between the first pin seat arm of the upper lock pin seat and the first top connecting arm of the mounting ring, and between the second pin seat arm of the upper lock pin seat and the second top connecting arm of the mounting ring; the total number of second adjustment gaskets is fixed; by adjusting the number of second adjustment gaskets between the first pin seat arm of the upper lock pin seat and the first top connecting arm of the mounting ring, and the number of second adjustment gaskets between the second pin seat arm of the upper lock pin seat and the second top connecting arm of the mounting ring, the relative position of the upper lock pin seat and the mounting ring in the Z direction is changed to achieve position adjustment of the upper lock pin and the mounting ring in the Z-axis direction; the lock pin seat fixing bolt passes through the upper lock pin seat, the mounting ring, the upper lock pin seat pressure plate and the second adjustment gasket and is locked.

[0019] In combination with the first aspect, in certain implementations of the first aspect, a backup gasket is provided between the first pin seat arm of the upper lock pin seat and the center beam of the upper lock pin seat pressure plate, and / or between the second pin seat arm of the upper lock pin seat and the center beam of the upper lock pin seat pressure plate; the backup gasket serves as a locking gasket between the upper lock pin seat and the upper lock pin seat pressure plate; when the Z-direction adjustment amount between the mounting ring and the upper lock pin seat is greater than the total thickness of the second adjustment gasket, the backup gasket is taken out and placed between the mounting ring and the upper lock pin seat to supplement the Z-direction adjustment amount.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the device is installed on the landing gear; the device is aligned with the upper lock hook along the landing gear retraction movement trajectory, and is hooked by the upper lock hook as the landing gear is retracted, thereby reliably fixing the landing gear.

[0021] In a second aspect, a landing gear assembly is provided, the landing gear assembly comprising a landing gear upper lock pin fixing base device with adjustable three-axis position as described in any one of the implementation methods in the first aspect above, and also comprising an upper lock hook and a landing gear, wherein the device is mounted on the landing gear; the device is aligned with the upper lock hook along the landing gear retraction motion trajectory, and is hooked by the upper lock hook as the landing gear is retracted, thereby reliably fixing the landing gear.

[0022] Compared with the prior art, the solution provided by the present invention includes at least the following beneficial technical effects:

[0023] The present invention uses gaskets to adjust the position between the upper lock pin base and the toothed plate in the Y-axis direction and between the upper lock pin seat pressure plate and the upper lock pin seat in the Z-axis direction, thereby achieving rigidity, simple structure, and low manufacturing cost; in the X-axis direction, the toothed plate and the upper lock pin seat pressure plate replace the meshing teeth to achieve position adjustment, thereby achieving independent adjustment of the position of the upper lock pin of the landing gear in the three directions of XYZ, improving the compensation ability of the upper lock pin structure for structural deformation, and improving the reliability of the upper lock locking device of the landing gear under severe vibration conditions. By adjusting the assembly sequence of the components and aligning the toothed shape, the fine adjustment of the upper lock pin position in the three-axis directions of XYZ is achieved, and the compensation ability of the upper lock of the landing gear under the conditions of design, process, and use deformation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the working principle diagram of the hook and ring type upper lock.

[0025] Figure 2 This is the disassembly and assembly diagram of the upper locking pin fixing base device of the landing gear with adjustable three-axis position.

[0026] Figure 3 Schematic diagram of adjustment and fixation in the X direction.

[0027] Figure 4Schematic diagram of Y-direction adjustment and fixation.

[0028] Figure 5 Schematic diagram of Z-direction adjustment and fixation.

[0029] Explanation of the reference numerals: 1. Upper locking pin, 2. Locking pin fixing bolt, 3. Upper locking pin seat, 4. Locking pin seat fixing bolt, 5. Mounting ring, 6. Second adjusting gasket, 7. Toothed plate, 8. Gasket bracket, 9. First adjusting gasket, 10. Upper locking pin seat pressure plate. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The invention provides a landing gear upper lock pin fixing base device with adjustable three-axis positions. Figure 1 The application scenario of the upper locking pin fixing base device is shown. Figure 1 The dotted line in the middle is the locked state of the upper lock, and the solid line is the unlocked state of the upper lock. The upper lock pin fixing base device is installed on the landing gear. The upper lock hook is fixed to the cabin through the upper lock and the cabin connection point. The upper lock pin fixing base device is aligned with the upper lock hook along the landing gear retraction movement trajectory, and is hooked by the upper lock hook as the landing gear is retracted, so as to reliably fix the landing gear.

[0032] Figure 2 The upper lock pin fixing base device of the landing gear with adjustable three-axis position is shown, including an upper lock pin 1, a lock pin fixing bolt 2, an upper lock pin seat 3, a lock pin seat fixing bolt 4, a mounting ring 5, a second adjustment gasket 6, a toothed plate 7, a gasket bracket 8, a first adjustment gasket 9, and an upper lock pin seat pressure plate 10. Figure 2 The assembly diagram in FIG. 1 shows the structure of the upper lock pin seat pressure plate 10 after being cut open by 1 / 4.

[0033] The upper lock pin seat 3 includes a pin seat platform and two pin seat arms located on both sides of the pin seat platform. The pin seat platform can be parallel to the XZ plane. The pin seat arms can be parallel to the XY plane. The two pin seat arms have through holes on the side away from the pin seat platform. The upper lock pin 1 is aligned with the through holes on the two pin seat arms of the upper lock pin seat 3, and the lock pin fixing bolt 2 is passed through to achieve a rigid connection between the upper lock pin 1 and the upper lock pin seat 3 in the three directions of XYZ.

[0034] The upper lock pin seat pressure plate 10 is in an I-shape, including a center beam and two protruding beams arranged on both sides of the center beam. The upper lock pin seat pressure plate 10 passes through the upper lock pin seat 3 so that the center beam of the upper lock pin seat pressure plate 10 is located above the upper lock pin seat 3, and the two pin seat arms of the upper lock pin seat 3 are clamped between the two protruding beams on both sides of the center beam of the lock pin seat pressure plate 10. The mounting ring 5 (for setting the piston rod) includes an annular body and two top connecting arms. The two top connecting arms are both located above the annular body, and between the two top connecting arms, the annular body forms a mounting platform arranged relatively parallel to the pin seat platform of the upper lock pin seat 3.

[0035] The center beam of the upper lock pin seat pressure plate 10 has a through hole, which is arranged opposite to the through hole of the top connecting arm of the mounting ring 5, and is arranged opposite to the through hole of the upper lock pin seat 3 pin seat arm close to the pin seat platform. By passing through the lock pin seat fixing bolt 4, the upper lock pin seat pressure plate 10 and the mounting ring 5 are rigidly connected in the three directions of XYZ. Among them, the upper lock pin seat 3 pin seat arm is clamped between the center beam of the upper lock pin seat pressure plate 10 and the top connecting arm of the mounting ring 5. The upper lock pin seat 3 pin seat platform is clamped between the center beam of the upper lock pin seat pressure plate 10 and the mounting platform of the mounting ring 5.

[0036] The adjustment between the upper lock pin seat 3 and the upper lock pin seat pressure plate 10 in the X direction is achieved through the toothed plate 7. The pin seat platform of the upper lock pin seat 3 has two slots, which are arranged on both sides of the pin seat platform of the upper lock pin seat 3 along the X direction. Correspondingly, the toothed plate 7 has two protrusions, which are arranged on both sides of the toothed plate 7 along the X direction. The two protrusions of the toothed plate 7 are respectively inserted into the two slots of the upper lock pin seat 3. The upper lock pin seat 3 and the toothed plate 7 are fixed in the X direction through a tenon structure.

[0037] The toothed plate 7 is arranged between the pin seat platform of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10. The center beam of the upper lock pin seat pressure plate 10 has a first tooth structure on the side facing the toothed plate 7, and the toothed plate 7 has a second tooth structure on the side facing the upper lock pin seat pressure plate 10. The first tooth structure and the second tooth structure are meshed with each other. The tooth units of the first tooth structure and the tooth units of the second tooth structure both extend along the Z direction, and a plurality of tooth units are arranged along the X direction. Therefore, in the X direction, the lower part of the upper lock pin seat pressure plate 10 can be meshed with the toothed plate 7 through teeth. By replacing the meshing teeth of the toothed plate 7 and the upper lock pin seat pressure plate 10, the position adjustment in the x-axis direction between the mounting ring 5 and the upper lock pin seat 3 can be achieved, and then the position adjustment of the mounting ring 5 and the upper lock pin 1 in the X direction can be achieved, and the adjustment effect is as follows: Figure 3 Shown by the dashed line.

[0038] like Figure 4As shown, in the Y direction, a first adjustment shim 9 can be provided between the pin seat platform of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10, and between the pin seat platform of the upper lock pin seat 3 and the mounting platform of the mounting ring 5. The total number of the first adjustment shims 9 can be relatively fixed, so the distance from the center beam of the upper lock pin seat pressure plate 10 to the mounting platform of the mounting ring 5 can be relatively fixed. By increasing the number of the first adjustment shims 9 between the pin seat platform of the upper lock pin seat 3 and the mounting platform of the mounting ring 5, that is, reducing the number of the first adjustment shims 9 between the pin seat platform of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10, the distance between the upper lock pin seat 3 and the mounting ring 5 in the Y direction can be increased. By reducing the number of the first adjustment shims 9 between the pin seat platform of the upper lock pin seat 3 and the mounting platform of the mounting ring 5, that is, increasing the number of the first adjustment shims 9 between the pin seat platform of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10, the distance between the upper lock pin seat 3 and the mounting ring 5 in the Y direction can be reduced.

[0039] In some embodiments, a gasket bracket 8 may be provided on the side of the mounting platform of the mounting ring 5 facing the pin seat platform of the upper lock pin seat 3. The mounting ring 5 is in contact with the gasket bracket 8 in the Y direction. The pin seat platform of the upper lock pin seat 3 is located between the toothed plate 7 and the gasket bracket 8. The position adjustment of the upper lock pin seat 3 and the mounting ring 5 in the Y-axis direction can be achieved by increasing or decreasing the number of the first adjustment gaskets 9 between the toothed plate 7 and the upper lock pin seat 3, and between the gasket bracket 8 and the upper lock pin seat 3, thereby achieving the position adjustment of the upper lock pin 1 and the mounting ring 5 in the Y-axis direction. The center beam of the upper lock pin seat pressure plate 10 presses the upper lock pin seat 3, the toothed plate 7 and the gasket bracket 8 to the mounting ring 5 through the first adjustment gasket 9.

[0040] like Figure 5 As shown, in the Z direction, between the first pin seat arm of the upper lock pin seat 3 and the first top connecting arm of the mounting ring 5, and between the second pin seat arm of the upper lock pin seat 3 and the second top connecting arm of the mounting ring 5, a second adjusting shim 6 can be provided. The total number of the second adjusting shims 6 can be relatively fixed. By increasing / decreasing the number of the second adjusting shims 6 between the first pin seat arm of the upper lock pin seat 3 and the first top connecting arm of the mounting ring 5, that is, decreasing / increasing the number of the second adjusting shims 6 between the second pin seat arm of the upper lock pin seat 3 and the second top connecting arm of the mounting ring 5, the relative position of the upper lock pin seat 3 and the mounting ring 5 in the Z direction can be changed.

[0041] The position of the upper lock pin seat 3 and the mounting ring 5 in the Z-axis direction is adjusted by replacing the position of the second adjusting gasket 6 between the mounting ring 5 and the upper lock pin seat 3, and finally the position of the upper lock pin 1 and the mounting ring 5 in the Z-axis direction is adjusted. The lock pin seat fixing bolt 4 passes through the upper lock pin seat 3, the mounting ring 5, the upper lock pin seat pressure plate 10 and the second adjusting gasket 6 and is locked.

[0042] In some embodiments, a backup gasket may be provided between the first pin seat arm of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10, and / or between the second pin seat arm of the upper lock pin seat 3 and the center beam of the upper lock pin seat pressure plate 10. The backup gasket may serve as a locking gasket between the upper lock pin seat 3 and the upper lock pin seat pressure plate 10; when the Z-direction adjustment amount between the mounting ring 5 and the upper lock pin seat 3 is large, the backup gasket may be taken out and placed between the mounting ring 5 and the upper lock pin seat 3 to supplement the Z-direction adjustment amount.

[0043] Although the present invention is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A landing gear upper lock pin fixing base device with adjustable three-axis positions, characterized in that: It comprises an upper lock pin (1), an upper lock pin seat (3), a mounting ring (5), a second adjustment gasket (6), a toothed plate (7), a gasket bracket (8), a first adjustment gasket (9), and an upper lock pin seat pressure plate (10); The upper lock pin (1) and the upper lock pin seat (3) are rigidly connected, the mounting ring (5) and the upper lock pin seat pressure plate (10) are rigidly connected, the upper lock pin seat (3) comprises a pin seat platform, the pin seat platform is located between the upper lock pin seat pressure plate (10) and the mounting ring (5), and the pin seat platform is parallel to the XZ plane; The toothed plate (7) is arranged between the pin seat platform of the upper lock pin seat (3) and the upper lock pin seat pressure plate (10), and is fixed relative to the pin seat platform of the upper lock pin seat (3) in the X direction; the upper lock pin seat pressure plate (10) has a first tooth structure on the side facing the toothed plate (7), and the toothed plate (7) has a second tooth structure on the side facing the upper lock pin seat pressure plate (10); the first tooth structure and the second tooth structure are meshed with each other; the tooth units of the first tooth structure and the tooth units of the second tooth structure both extend in the Z direction, and a plurality of tooth units are arranged in the X direction; the relative positions of the upper lock pin seat (3) and the mounting ring (5) in the X direction are changed by adjusting the relative meshing positions of the first tooth structure and the second tooth structure; By adjusting the number of first adjustment gaskets (9) sandwiched between the upper lock pin seat (3) and the mounting ring (5), the first adjustment gaskets (9) are perpendicular to the Y direction, thereby changing the relative positions of the upper lock pin seat (3) and the mounting ring (5) in the Y direction; By adjusting the number of second adjustment gaskets (6) sandwiched between the upper lock pin seat (3) and the mounting ring (5), the second adjustment gaskets (6) are perpendicular to the Z direction, thereby changing the relative position of the upper lock pin seat (3) and the mounting ring (5) in the Y direction.

2. The device according to claim 1, characterized in that The upper lock pin seat (3) and the toothed plate (7) are fixed in the X direction by means of a latch structure; wherein the pin seat platform of the upper lock pin seat (3) has two latch grooves, which are arranged on both sides of the pin seat platform of the upper lock pin seat (3) along the X direction; the toothed plate (7) has two protrusions, which are arranged on both sides of the toothed plate (7) along the X direction; and the two protrusions of the toothed plate (7) are respectively inserted into the two latch grooves of the upper lock pin seat (3).

3. The device according to claim 1 or 2, characterized in that: The upper lock pin seat (3) also includes two pin seat arms located on both sides of the pin seat platform; the pin seat arms are parallel to the XY plane; the two pin seat arms have through holes on the side away from the pin seat platform; the upper lock pin (1) is aligned with the through holes on the two pin seat arms of the upper lock pin seat (3) and passes through the lock pin fixing bolt (2) to achieve a rigid connection between the upper lock pin (1) and the upper lock pin seat (3) in the three directions of XYZ.

4. The device according to claim 3, characterized in that The upper lock pin seat pressure plate (10) is in an I-shape, comprising a center beam and two protruding beams arranged on both sides of the center beam; the upper lock pin seat pressure plate (10) passes through the upper lock pin seat (3), so that the center beam of the upper lock pin seat pressure plate (10) is located above the upper lock pin seat (3), and the two pin seat arms of the upper lock pin seat (3) are both sandwiched between the two protruding beams on both sides of the center beam of the lock pin seat pressure plate (10); The mounting ring (5) comprises an annular body and two top connecting arms; the two top connecting arms are both located above the annular body, and between the two top connecting arms, the annular body forms a mounting platform arranged relatively parallel to the pin seat platform of the upper locking pin seat (3); The center beam of the upper lock pin seat pressure plate (10) has a through hole, and the through hole of the center beam of the upper lock pin seat pressure plate (10) is arranged opposite to the through hole of the top connecting arm of the mounting ring (5), and is arranged opposite to the through hole of the pin seat arm of the upper lock pin seat (3) close to the pin seat platform; by passing the lock pin seat fixing bolt (4), the upper lock pin seat pressure plate (10) and the mounting ring (5) are rigidly connected in three directions XYZ; wherein, the pin seat arm of the upper lock pin seat (3) is clamped between the center beam of the upper lock pin seat pressure plate (10) and the top connecting arm of the mounting ring (5); the pin seat platform of the upper lock pin seat (3) is clamped between the center beam of the upper lock pin seat pressure plate (10) and the mounting platform of the mounting ring (5).

5. The device according to claim 4, characterized in that In the Y direction, a first adjustment gasket (9) is arranged between the pin seat platform of the upper lock pin seat (3) and the center beam of the upper lock pin seat pressure plate (10), and between the pin seat platform of the upper lock pin seat (3) and the mounting platform of the mounting ring (5); the total number of the first adjustment gaskets (9) is fixed; and the distance between the upper lock pin seat (3) and the mounting ring (5) in the Y direction is adjusted by adjusting the number of the first adjustment gaskets (9) between the pin seat platform of the upper lock pin seat (3) and the mounting platform of the mounting ring (5).

6. The device according to claim 5, characterized in that A gasket bracket (8) is provided on the side of the mounting platform of the mounting ring (5) facing the pin seat platform of the upper lock pin seat (3); the mounting ring (5) and the gasket bracket (8) are in contact with each other in the Y direction; the pin seat platform of the upper lock pin seat (3) is located between the toothed plate (7) and the gasket bracket (8); by increasing or decreasing the number of first adjustment gaskets (9) between the toothed plate (7) and the upper lock pin seat (3), and between the gasket bracket (8) and the upper lock pin seat (3), the position adjustment of the upper lock pin seat (3) and the mounting ring (5) in the Y-axis direction is achieved, thereby achieving the position adjustment of the upper lock pin (1) and the mounting ring (5) in the Y-axis direction; the center beam of the upper lock pin seat pressure plate (10) presses the upper lock pin seat (3), the toothed plate (7) and the gasket bracket (8) against the mounting ring (5) through the first adjustment gasket (9).

7. The device according to claim 4, characterized in that In the Z direction, a second adjustment gasket (6) is arranged between the first pin seat arm of the upper lock pin seat (3) and the first top connecting arm of the mounting ring (5), and between the second pin seat arm of the upper lock pin seat (3) and the second top connecting arm of the mounting ring (5); the total number of the second adjustment gaskets (6) is fixed; by adjusting the number of the second adjustment gaskets (6) between the first pin seat arm of the upper lock pin seat (3) and the first top connecting arm of the mounting ring (5), and the number of the second adjustment gaskets (6) between the second pin seat arm of the upper lock pin seat (3) and the second top connecting arm of the mounting ring (5), the relative position of the upper lock pin seat (3) and the mounting ring (5) in the Z direction is changed, so that the position adjustment of the upper lock pin (1) and the mounting ring (5) in the Z axis direction is achieved; the lock pin seat fixing bolt (4) passes through the upper lock pin seat (3), the mounting ring (5), the upper lock pin seat pressure plate (10) and the second adjustment gasket (6) and is locked.

8. The device according to claim 4, characterized in that A backup gasket is provided between the first pin seat arm of the upper lock pin seat (3) and the center beam of the upper lock pin seat pressure plate (10), and / or between the second pin seat arm of the upper lock pin seat (3) and the center beam of the upper lock pin seat pressure plate (10); the backup gasket serves as a locking gasket between the upper lock pin seat (3) and the upper lock pin seat pressure plate (10); when the Z-direction adjustment amount between the mounting ring (5) and the upper lock pin seat (3) is greater than the total thickness of the second adjustment gasket (6), the backup gasket is taken out and placed between the mounting ring (5) and the upper lock pin seat (3) to supplement the Z-direction adjustment amount.

9. The device according to claim 1, characterized in that The device is installed on the landing gear; the device is aligned with the upper lock hook along the landing gear retracting movement trajectory, and is hooked by the upper lock hook as the landing gear retracts, thereby reliably fixing the landing gear.

10. A landing gear assembly, characterized in that: The landing gear assembly includes a three-axis position adjustable landing gear upper lock pin fixing base device as described in any one of claims 1 to 9, and also includes an upper lock hook and a landing gear, and the device is installed on the landing gear; the device is aligned with the upper lock hook along the landing gear retraction movement trajectory, and is hooked by the upper lock hook as the landing gear is retracted, so as to reliably fix the landing gear.

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