Auxiliary tool for disassembling and assembling 737NG series nose landing gear

Abstract

A 737NG series nose landing gear dismounting auxiliary tool relates to the field of aircraft maintenance tools, the auxiliary tool is connected with a 737NG landing gear, then a lifting rod slides up and down in a sliding chute I of a vertical rod, and a moving rod slides left and right in a sliding chute II of a cross rod to adjust the angle of the 737NG landing gear. After adjustment is completed, the position, relative to the vertical rod, of the lifting rod is locked through a locking mechanism I, and the position, relative to the transverse rod, of the moving rod is locked through a locking mechanism II. The power mechanism drives the lifting seat to move downwards relative to the base through the connecting rod mechanism to complete disassembly of the 737NG landing gear. The disassembly and assembly efficiency of the 737NG undercarriage is improved, and the maintenance convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of aircraft maintenance tools, specifically to an auxiliary tool for disassembling and assembling the nose landing gear of the 737NG series. Background Technology

[0002] Aircraft maintenance refers to the upkeep and repair of aircraft and their technical equipment to ensure the safety and reliability of the aircraft, which is a crucial guarantee for safe flight. Aircraft maintenance engineers are responsible for inspecting the completeness of all components, equipment, and parts of the aircraft and performing maintenance work to ensure safe flight. Landing gear maintenance is particularly important, as its main functions include supporting the aircraft's movement on the ground, shock absorption, turning, and braking. The landing gear is the only component that supports the entire aircraft, so it is relatively heavy. Auxiliary maintenance tools are needed during landing gear maintenance, primarily for assisting in the installation and removal of the landing gear; therefore, a specific type of aircraft maintenance auxiliary tool is required.

[0003] However, the existing auxiliary tools for aircraft maintenance do not have standard and suitable tooling to meet the needs of the current processes of disassembling, installing and storing the nose landing gear. The nose landing gear is very heavy and the space near the landing gear is small, so there are few maintenance personnel who can participate in the work, and the force is not concentrated and unstable, making the disassembly and installation of the nose landing gear very difficult. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned technologies, this utility model provides an auxiliary tool that can reduce the number of maintenance personnel involved in the work and solve the problem of unstable and unconcentrated force, which makes the disassembly and installation of the front landing gear very difficult.

[0005] The technical solution adopted by this utility model to overcome its technical problem is:

[0006] A tool for disassembling and assembling the front landing gear of a 737NG series aircraft includes:

[0007] The base has a lifting seat at its upper end, and the lifting seat is movably connected to the base in the height direction via a linkage mechanism.

[0008] The power mechanism, located on the base, is used to drive the lifting seat to move up and down relative to the base;

[0009] The lifting platform is installed on the lifting base, and the head end of the lifting platform is provided with a placement groove that matches the landing gear wheel axle of the 737NG;

[0010] A vertical rod is installed on the lifting plate. A sliding groove I is provided inside the vertical rod along the vertical direction. The lifting rod is slidably inserted into the sliding groove I. A top plate is provided on the top plate of the lifting rod. The lifting rod is locked relative to the vertical rod by a locking mechanism I.

[0011] A crossbar is installed on the top plate. A horizontal groove II is provided in the crossbar along the left and right direction. A moving rod is slidably inserted into the groove II. A connecting hole matching the 737NG landing gear connection part is provided on the outer end of the moving rod. The moving rod is locked relative to the crossbar by the locking mechanism II.

[0012] For easy movement, casters are installed at the four corners of the lower part of the base.

[0013] Furthermore, the aforementioned linkage mechanism includes a rotating rod I and a rotating rod II hinged together in the middle by a pin V. The lower end of the rotating rod I is hinged to the base by the pin II, and the upper end of the rotating rod II is hinged to the lower end of the lifting seat by the pin IV. The upper end of the rotating rod I is equipped with a pin V, and a roller is rotatably mounted on the pin V. The roller makes rolling contact with the lower end face of the lifting seat.

[0014] Furthermore, the aforementioned power mechanism includes a screw I rotatably mounted in the base via a bearing seat, a motor mounted on the base, the axis of the screw I being horizontally arranged in the left-right direction, the output shaft of the motor being coaxially connected to the screw I, a nut being screwed onto the screw I, a pin I being provided at the outer end of the nut, and the lower end of the rotating rod II being hinged to the pin I.

[0015] Furthermore, the aforementioned locking mechanism I includes an opening slot I disposed vertically on the side end of the vertical rod, a slider I disposed on the side end of the lifting rod, a screw II horizontally mounted on the outer end of the slider I, and a nut I screwed onto the screw II. The slider I is slidably inserted into the opening slot I, the screw II passes through the opening slot I, and the inner end face of the nut I contacts the corresponding outer end face of the vertical rod.

[0016] Furthermore, the aforementioned locking mechanism Ⅱ includes an open slot Ⅱ arranged horizontally at the front end of the crossbar, a slider Ⅱ arranged at the front end of the moving rod, a screw Ⅲ horizontally installed on the outer end of the slider Ⅱ, and a nut Ⅱ screwed onto the screw Ⅲ. The slider Ⅱ is slidably inserted into the open slot Ⅱ, the screw Ⅲ passes through the open slot Ⅱ, and the inner end face of the nut Ⅱ contacts the corresponding front end face of the crossbar.

[0017] The beneficial effects of this utility model are as follows: The auxiliary tool connects to the 737NG landing gear, allowing the lifting rod to slide up and down in the vertical rod's groove I, and the moving rod to slide left and right in the horizontal rod's groove II, thus adjusting the 737NG landing gear angle. After adjustment, locking mechanism I locks the lifting rod relative to the vertical rod, and locking mechanism II locks the moving rod relative to the horizontal rod. The power mechanism drives the lifting seat to move downwards relative to the base via a linkage mechanism, completing the disassembly of the 737NG landing gear. This improves the efficiency of disassembly and installation of the 737NG landing gear and enhances the convenience of maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the screw part of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the lifting support mechanism of this utility model;

[0021] Figure 4 This is an exploded three-dimensional view of the vertical rod portion of this utility model.

[0022] Figure 5 This is an exploded three-dimensional view of the crossbar portion of this utility model.

[0023] In the diagram, 1. Base; 2. Caster wheel; 3. Screw I; 4. Motor; 5. Nut; 6. Pin I; 7. Rotating rod I; 8. Pin II; 9. Rotating rod II; 10. Pin III; 11. Lifting seat; 12. Lifting plate; 13. Placement slot; 14. Vertical rod; 15. Horizontal rod; 16. Moving rod; 17. Connecting hole; 18. Bearing with seat; 19. Pin IV; 20. Slide groove II; 21. Pin V; 22. Roller; 23. Slide groove I; 24. Opening slot I; 25. Lifting rod; 26. Top plate; 27. Slider I; 28. Screw II; 29. ​​Nut I; 30. Slider II; 31. Nut II; 32. Screw III; 33. Opening slot II. Detailed Implementation

[0024] The following is combined with Figure 1 To be continued Figure 5 The present invention will be further described below.

[0025] A tool for disassembling and assembling the front landing gear of a 737NG series aircraft includes: a base 1 with a lifting seat 11 at its upper end, the lifting seat 11 being movably connected to the base 1 in the height direction via a linkage mechanism; a power mechanism, mounted on the base 1, for driving the lifting seat 11 to move up and down relative to the base 1; a lifting plate 12, mounted on the lifting seat 11, the head end of the lifting plate 12 having a placement groove 13 matching the axle of the 737NG landing gear; a vertical rod 14, mounted on the lifting plate 12, the vertical rod 14 having a sliding groove I 23 arranged in the vertical direction, the lifting rod 25 being slidably inserted into the sliding groove I 23, the top plate of the lifting rod 25 having a top plate 26, the lifting rod 25 being locked relative to the vertical rod 14 by a locking mechanism I; and a horizontal rod 15, mounted on the top plate 16, the horizontal rod 15 having a sliding groove II 20 arranged horizontally in the left and right direction, the moving rod 16 being slidably inserted into the sliding groove II. In section 20, the outer end of the moving rod 16 is provided with a connecting hole 17 that matches the 737NG landing gear connection part. The moving rod 16 is locked relative to the crossbar 15 by the locking mechanism II. In use, the entire auxiliary tool is moved to the aircraft landing gear. The lifting seat 11 is driven by the power mechanism to move up and down relative to the base 1 through the linkage mechanism. The lifting rod 25 is pulled so that it slides up and down in the slide groove I 23 of the vertical rod 14 and is adjusted to a suitable height so that the 737NG landing gear wheel axle is placed in the placement groove 13. The moving rod 16 is pulled so that it slides left and right in the slide groove II 20 of the crossbar 15 and is adjusted to a suitable position so that the 737NG landing gear wheel connection part coincides with the connecting hole 17. Then, the pin is inserted into the 737NG landing gear connection part and the connecting hole 17 to connect the auxiliary tool to the 737NG landing gear. Then, the lifting rod 25 slides up and down in the slide groove I 23 of the vertical rod 14 and the moving rod 16 slides in the slide groove II 20 of the crossbar 15. The 737NG landing gear angle is adjusted by sliding left and right on the 20th component. After adjustment, locking mechanism I locks the position of the lifting rod 25 relative to the vertical rod 14, and locking mechanism II locks the position of the moving rod 16 relative to the horizontal rod 15. The power mechanism drives the lifting seat 11 to move downward relative to the base 1 via a linkage mechanism to disassemble the 737NG landing gear. Similarly, after the 737NG landing gear is fixed to this auxiliary tool, the power mechanism drives the lifting seat 11 to move upward relative to the base 1 via a linkage mechanism to install the 737NG landing gear. This improves the efficiency of disassembly and installation of the 737NG landing gear and enhances the convenience of maintenance.

[0026] In one embodiment of this utility model, casters 2 are installed at the four corners of the lower end of the base 1. By providing casters 2 at the lower end of the base 1, the entire auxiliary tool can be easily moved to the construction position, improving the convenience of operation.

[0027] In one embodiment of this utility model, the linkage mechanism includes a rotating rod I 7 and a rotating rod II 9, which are hinged together in the middle by a pin V 20. The lower end of the rotating rod I 7 is hinged to the base 1 by a pin II 8, and the upper end of the rotating rod II 9 is hinged to the lower end of the lifting seat 11 by a pin IV 19. A pin V 21 is mounted on the upper end of the rotating rod I 7, and a roller 2 is rotatably mounted on the pin V 21. The lower end of the rotating rod II 9 is hinged to a pin I 6. When the lifting seat 11 moves upward, the rotating rod I 7 rotates counterclockwise and the rotating rod II 9 rotates clockwise, and the roller 22 slides at the bottom of the lifting seat 11 to raise the lifting seat 11 relative to the base 1. When the lifting seat 11 moves downward, the rotating rod I 7 rotates clockwise and the rotating rod II 9 rotates counterclockwise, and the roller 22 slides at the bottom of the lifting seat 11 to lower the lifting seat 11 relative to the base 1.

[0028] In one embodiment of this utility model, the power mechanism includes a screw I 3 rotatably mounted in a base 1 via a bearing 18, and a motor 4 mounted on the base 1. The axis of the screw I 3 is horizontally arranged in the left-right direction. The output shaft of the motor 4 is coaxially connected to the screw I 3. A nut 5 is screwed onto the screw I 3, and a pin I 6 is provided at the outer end of the nut 5. The lower end of the rotating rod II 9 is hinged to the pin I 6. When the motor 4 operates, it drives the screw I 3 to rotate. The rotation of the screw I 3 causes the nut 4 to drive the rotating rod II 9 to rotate clockwise or counterclockwise, thereby raising or lowering the lifting seat 11.

[0029] In one embodiment of this utility model, the locking mechanism I includes an opening groove I 24 vertically disposed on the side end of the vertical rod 14, a slider I 27 disposed on the side end of the lifting rod 25, a screw II 28 horizontally mounted on the outer end of the slider I 27, and a nut I 29 screwed onto the screw II 28. The slider I 27 is slidably inserted into the opening groove I 24, the screw II 28 protrudes from the opening groove I 24, and the inner end face of the nut I 29 contacts the corresponding outer end face of the vertical rod 14. When the lifting rod 25 slides along the sliding groove I 23, the slider I 27 slides up and down in the opening groove I 24. After sliding into position, tightening the nut I 29 can lock and fix the lifting rod 25 to the vertical rod 14.

[0030] In one embodiment of this utility model, the locking mechanism II includes an open slot II 33 horizontally disposed at the front end of the crossbar 15, a slider II 30 disposed at the front end of the movable rod 16, a screw III 32 horizontally mounted on the outer end of the slider II 30, and a nut II 31 screwed onto the screw III 32. The slider II 30 is slidably inserted into the open slot II 33, the screw III 32 protrudes from the open slot II 33, and the inner end face of the nut II 31 contacts the corresponding front end face of the crossbar 15. When the movable rod 16 slides along the sliding groove II 20, the slider II 30 slides left and right in the open slot II 33. After sliding into position, tightening the nut II 31 can lock and fix the movable rod 16 to the crossbar 15.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tool for disassembling and assembling the front landing gear of a 737NG series aircraft, characterized in that, include: The base (1) has a lifting seat (11) at its upper end. The lifting seat (11) is movably connected to the base (1) in the height direction through a linkage mechanism. The power mechanism is located on the base (1) and is used to drive the lifting seat (11) to move up and down relative to the base (1); The lifting plate (12) is installed on the lifting seat (11), and the head end of the lifting plate (12) is provided with a placement groove (13) that matches the landing gear wheel axle of the 737NG. A vertical rod (14) is installed on a lifting plate (12). A sliding groove I (23) is provided in the vertical direction inside the vertical rod (14). The lifting rod (25) is slidably inserted into the sliding groove I (23). A top plate (26) is provided on the top plate of the lifting rod (25). The lifting rod (25) is locked relative to the vertical rod (14) by a locking mechanism I. A crossbar (15) is installed on the top plate (26). A sliding groove II (20) is horizontally provided in the crossbar (15) along the left and right directions. A moving rod (16) is slidably inserted into the sliding groove II (20). A connecting hole (17) matching the 737NG landing gear connection part is provided on the outer end of the moving rod (16). The moving rod (16) is locked relative to the crossbar (15) by the locking mechanism II.

2. The 737NG series front landing gear disassembly and assembly auxiliary tool according to claim 1, characterized in that: The base (1) is equipped with casters (2) at the four corners of its lower end.

3. The 737NG series front landing gear disassembly and assembly auxiliary tool according to claim 1, characterized in that: The linkage mechanism includes a rotating rod I (7) and a rotating rod II (9) hinged together in the middle by a pin V (21). The lower end of the rotating rod I (7) is hinged to the base (1) by a pin II (8), and the upper end of the rotating rod II (9) is hinged to the lower end of the lifting seat (11) by a pin IV (19). The upper end of the rotating rod I (7) is equipped with a pin V (21), and a roller (22) is rotatably mounted on the pin V (21). The roller (22) makes rolling contact with the lower end face of the lifting seat (11).

4. The 737NG series front landing gear disassembly and assembly auxiliary tool according to claim 1, characterized in that: The power mechanism includes a screw I (3) rotatably mounted in the base (1) via a bearing (18) and a motor (4) mounted on the base (1). The axis of the screw I (3) is horizontally arranged in the left-right direction. The output shaft of the motor (4) is coaxially connected to the screw I (3). A nut (5) is screwed onto the screw I (3). A pin I (6) is provided on the outer end of the nut (5). The lower end of the rotating rod II (9) is hinged to the pin I (6).

5. The 737NG series front landing gear disassembly and assembly auxiliary tool according to claim 1, characterized in that: The locking mechanism I includes an opening slot I (24) set vertically on the side end of the vertical rod (14), a slider I (27) set on the side end of the lifting rod (25), a screw II (28) horizontally installed on the outer end of the slider I (27), and a nut I (29) screwed onto the screw II (28). The slider I (27) is slidably inserted into the opening slot I (24), the screw II (28) passes through the opening slot I (24), and the inner end face of the nut I (29) contacts the corresponding outer end face of the vertical rod (14).

6. The 737NG series front landing gear disassembly and assembly auxiliary tool according to claim 1, characterized in that: The locking mechanism II includes an opening slot II (33) set horizontally at the front end of the crossbar (15), a slider II (30) set at the front end of the moving rod (16), a screw III (32) horizontally installed on the outer end of the slider II (30), and a nut II (31) screwed onto the screw III (32). The slider II (30) is slidably inserted into the opening slot II (33), the screw III (32) passes through the opening slot II (33), and the inner end face of the nut II (31) contacts the corresponding front end face of the crossbar (15).

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