Tool for removing nut locking plate of rear pivot of main landing gear of aircraft

Abstract

The utility model discloses an aircraft main landing gear rear pivot nut locking plate dismantling tool which comprises a base, a guide block and a prying claw, a guide groove is formed in the guide block, and a first threaded hole penetrating through the guide groove from the top face is formed in the guide block; the prying claw comprises an inverted-L-shaped structure composed of a guide section, a side fixing section and a tip part, and a second threaded hole is formed in the side fixing section; the four guide blocks are fixed to the base, one prying claw is correspondingly installed in a guide groove of each guide block, the guide section of each prying claw is inserted into the corresponding guide groove, and the tip of each prying claw is aligned to a gap between the lower end face of a convex portion of a nut locking plate to be dismantled and the bottom face of a groove of a nut. The dismounting efficiency of the nut locking plate can be improved, and meanwhile the dismounted nut locking plate and the dismounted nut are prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to a tool for removing a locking piece of a rear pivot nut of an aircraft main landing gear. Background Art

[0002] The rear pivot assembly of the main landing gear of the A320 series aircraft is mainly composed of a safety ring, a nut lock plate, a nut, a rear axle pin and an oil needle. The nut lock plate and the nut are in close contact with the safety ring through four 90-degree concave-convex matching structures, that is, there are four convex parts on the nut lock plate and four grooves on the nut. The four convex parts are correspondingly inserted into the four grooves to form a concave-convex matching structure. In the past, the nut lock plate was removed from the nut by using a sharp tool to increase the concave-convex matching gap between the nut lock plate and the nut and then prying the nut lock plate open. Due to the limited space and dead corners, in actual operation, only one or two of the concave-convex matching structures can be pried open. In addition, the force is uneven during the prying process, and the stress concentration will increase the difficulty of removing the nut lock plate. There is also a high possibility of damage to the nut lock plate or nut during the operation. Utility Model Content

[0003] The utility model aims to provide a tool for removing a nut lock piece of a rear pivot shaft of an aircraft main landing gear, which can improve the removal efficiency of the nut lock piece and avoid damaging the removed nut lock piece and nut.

[0004] The purpose of the utility model can be achieved through the following technical solutions.

[0005] A tool for removing a locking piece of a rear pivot nut of an aircraft main landing gear, comprising:

[0006] A base, wherein the base is a cylindrical block;

[0007] A guide block, wherein a guide groove is formed on the guide block, and a first threaded hole is formed on the guide block and passes through the guide groove from the top surface;

[0008] The pry claw comprises a guide section, a side fixing section and a tip. shaped structure, a second threaded hole is provided on the side fixing section;

[0009] The front side of the base is used to fit the nut locking plate to be removed, and the back side of the base is fixed with four guide blocks, and a pry claw is correspondingly installed in the guide groove of each guide block, so that the guide section of the pry claw is inserted into the guide groove, and the tip of the pry claw is aligned with the gap between the lower end surface of the convex part of the nut locking plate to be removed and the bottom surface of the groove of the nut, the guide section of the pry claw is fastened by a bolt installed in the first threaded hole of the guide block, and the side fixing section of the pry claw is fastened by abutting against the side surface of the base by a bolt installed in the second threaded hole.

[0010] The utility model also has the following preferred designs:

[0011] A positioning boss which can be inserted into the middle hole of the nut locking plate to be removed is arranged at the front center of the base to facilitate positioning of the base and ensure a stable connection between the base and the rear pivot of the nut locking plate to be removed.

[0012] The side surface of the base of the utility model is provided with four positioning holes along the circumferential direction, and the front end of the bolt for fixing the side fixing section of the pry claw can be inserted into the corresponding positioning hole to stabilize the pry claw and prevent the pry claw from swinging.

[0013] The removal tool of the utility model also includes a punch rod, which can extend into the middle hole of the nut locking plate to be removed and the middle hole of the nut. One end of the punch rod is used to abut the base. After the removal tool is connected to the pivot of the nut locking plate to be removed, the punch rod is struck to impact the base, thereby loosening the nut locking plate.

[0014] The utility model has the following beneficial effects:

[0015] The removal tool of the utility model can be installed on the pivot of the nut locking plate to be removed, and the tips of the four prying claws are aligned with the gaps at the four concave-convex matching structures, and then a knocking force is applied to the base, so that the rear pivot nut locking plate can be easily removed, saving manpower and time and improving work efficiency; during the removal process, the force is transmitted to the tips of the four prying claws through the base, so that the four convex parts of the nut locking plate are subjected to force more evenly, and the removal difficulty will not be increased due to concentrated force, and the nut locking plate and the nut will not be damaged, thereby reducing the cost of component maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a tool for removing the nut lock piece of the rear pivot of the main landing gear of an aircraft and an exploded view of the rear pivot;

[0017] Figure 2 The utility model is a schematic diagram of the connection between a nut lock piece removal tool of a rear pivot shaft of an aircraft main landing gear and a rear pivot shaft.

[0018] Explanation of the accompanying drawings: 1-nut locking plate, 1a-protrusion, 2-nut, 2a-groove, 3-base, 3a-positioning hole, 3b-positioning boss, 4-guide block, 4a-guide groove, 4b-first threaded hole, 5-pry claw, 5a-guide section, 5b-side fixing section, 5c-tip, 6-punch rod. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can better understand and implement the technical solution of the present utility model.

[0020] like Figure 1and Figure 2 As shown, after removing the oil needle inside the rear pivot, the nut lock plate 1 and the nut 2 fit tightly together.

[0021] A tool for removing a locking piece of a rear pivot nut of an aircraft main landing gear, comprising:

[0022] Base 3, base 3 is a cylindrical block;

[0023] A guide block 4, wherein a guide groove 4a is formed on the guide block 4, and a first threaded hole 4b is formed on the guide block 4 and passes through the guide groove 4a from the top surface;

[0024] The pry claw 5 includes a guide section 5a, a side fixing section 5b and a tip 5c. shaped structure, a second threaded hole 5d is opened on the side fixing section 5b;

[0025] The front side of the base 3 is used to fit the nut locking piece 1 to be removed, and four guide blocks 4 are fixed to the back side of the base 3. A pry claw 5 is correspondingly installed in the guide groove 4a of each guide block 4, so that the guide section 5a of the pry claw 5 is inserted into the guide groove 4a, and the tip 5c of the pry claw 5 is aligned with the gap between the lower end surface of the protrusion 1a of the nut locking piece 1 to be removed and the bottom surface of the groove 2a of the nut 2. The guide section 5a of the pry claw 5 is fastened by a bolt installed in the first threaded hole 4b of the guide block 4. The protruding length of the guide section 5a can be adjusted by loosening the bolt. The side fixing section 5b of the pry claw 5 is fastened by abutting against the side surface of the base 3 through a bolt installed in the second threaded hole 5d.

[0026] As a preferred embodiment:

[0027] A positioning boss 3b is provided at the front center of the base 3 and can be inserted into the middle hole of the nut locking plate 1 to be removed, so as to facilitate the positioning of the base 3 and ensure a stable connection between the base 3 and the rear pivot of the nut locking plate 1 to be removed.

[0028] Four positioning holes 3a are formed on the side surface of the base 3 along the circumferential direction. The front ends of the bolts for fixing the side fixing sections 5b of the prying claw 5 can be inserted into the corresponding positioning holes 3a to stabilize the prying claw 5 and prevent the prying claw 5 from swinging.

[0029] To facilitate the removal operation, the present embodiment further includes a punch rod 6, which can extend into the middle hole of the nut lock plate 1 to be removed and the middle hole of the nut 2, and Figure 2 As shown, after the removal tool is connected to the rear pivot of the nut lock plate 1 to be removed, one end of the punch rod 6 abuts against the base 3, and the punch rod 6 is struck to hit the base 3, thereby loosening the nut lock plate 1. During the removal process, the force is transmitted to the tips of the four pry claws 5 through the base 3, so that the four convex parts 1a of the nut lock plate 1 are subjected to more uniform force, which will not increase the difficulty of removal due to concentrated force, and will not damage the nut lock plate 1 and the nut 2.

[0030] The above embodiments are only preferred embodiments of the utility model, but cannot be used as limitations of the utility model. Any modifications and improvements based on the concept of the utility model should fall within the protection scope of the utility model. The specific protection scope shall be subject to the claims.

Claims

1. A tool for removing the rear pivot nut lock plate of an aircraft main landing gear, characterized in that: include: A base, wherein the base is a cylindrical block; A guide block, wherein a guide groove is formed on the guide block, and a first threaded hole is formed on the guide block and passes through the guide groove from the top surface; The pry claw comprises a guide section, a side fixing section and a tip. shaped structure, a second threaded hole is provided on the side fixing section; The front side of the base is used to fit the nut locking plate to be removed, and the back side of the base is fixed with four guide blocks, and a pry claw is correspondingly installed in the guide groove of each guide block, so that the guide section of the pry claw is inserted into the guide groove, and the tip of the pry claw is aligned with the gap between the lower end surface of the convex part of the nut locking plate to be removed and the bottom surface of the groove of the nut, the guide section of the pry claw is fastened by a bolt installed in the first threaded hole of the guide block, and the side fixing section of the pry claw is fastened by abutting against the side surface of the base by a bolt installed in the second threaded hole.

2. The aircraft main landing gear rear pivot nut lock plate removal tool according to claim 1, characterized in that: A positioning boss which can be inserted into the middle hole of the nut locking plate to be removed is arranged at the center of the front side of the base.

3. The aircraft main landing gear rear pivot nut lock piece removal tool according to claim 2, characterized in that: Four positioning holes are provided on the side surface of the base along the circumferential direction, and the front ends of the bolts for fixing the side fixing sections of the pry claws can be inserted into the corresponding positioning holes.

4. The aircraft main landing gear rear pivot nut lock plate removal tool according to claim 1, characterized in that: It also includes a punch rod, which can extend into the middle hole of the nut lock plate to be removed and the middle hole of the nut, and one end of the punch rod is used to abut against the base.

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