Twist-off type high-locking nut dismounting device

Abstract

The invention provides a twist-off type high-locking nut dismantling device which comprises a shell, a holding ring, a clamping piece and a bit, the lower end of the bit is used for being matched with an inner hexagonal groove in the head of a high-locking bolt, and the upper end of the bit is installed in an inner ring of a bearing; a cavity is formed in the shell, a boss on the upper portion of the shell is installed in the bearing, and the lower end of the holding ring is connected with an inner ring of the bearing. A plurality of slideways facing the center of the shell are arranged on the inner wall of the cavity; a clamping piece is assembled in each sliding way and used for being matched with an arc-shaped face of the outer surface of a high-locking bolt. A threaded hole is formed in the side wall of the shell, a threaded pin is assembled in the threaded hole, and the end of the threaded pin is inserted into the sliding way and makes contact with the clamping piece. A spring is arranged between the clamping piece and the inner side wall of the shell, and the threaded pin is sleeved with the spring; the lower portion of the shell is of an open structure, and a high-locking nut to be disassembled can be inserted into the center of the interior of the shell through the lower end of the shell. The device is simple in structure and convenient to use.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology, and in particular relates to a twist-off type high-lock nut removal device. Background Art

[0002] Twist-off high-locking nuts are widely used in the assembly of aircraft wings and reinforcement frames. The self-locking part and the twist-off part of the nut are fastened to the high-locking bolt. The operator only needs to twist off the twist-off part of the high-locking nut to complete the predetermined self-locking connection, avoiding the need to apply force to the installed nut and simplifying the operation. However, since the self-locking part of the twist-off high-locking nut is a smooth cylinder after installation, it cannot be removed with a conventional wrench during the removal process because there is no effective point of force on the nut with an ordinary wrench. It can only be removed violently by using pliers or drilling holes in the nut. When using pliers, the nut cannot be clamped due to insufficient grip strength, which can easily cause slippage and make it impossible to remove; when drilling holes in the nut with a pneumatic drill or shoveling the nut with a flat shovel, the drill bit or flat shovel can easily slip off the nut and bump against the product, causing damage to the product. Summary of the invention

[0003] The purpose of the present invention is to provide a twist-off high-lock nut removal device, which solves the problem of difficult disassembly of twist-off high-lock nuts, improves the efficiency and quality of disassembly of twist-off high-lock nuts, reduces damage to products during the removal process and is suitable for removing twist-off high-lock nuts of various specifications.

[0004] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0005] A twist-off type high lock nut removal device comprises a housing, a holding ring, a clamping piece and a bit, wherein:

[0006] The screwdriver bit is a columnar structure. The lower end of the screwdriver bit is used to match the hexagonal groove inside the head of the high-locking bolt, and the upper end is installed in the inner ring of the bearing.

[0007] The shell is a columnar structure with a boss on the upper part, a cavity is arranged inside the shell, a bearing hole is arranged on the boss on the upper part of the shell, the bearing is installed in the bearing hole, a holding ring is located above the shell, the lower end of the holding ring is connected to the inner ring of the bearing, and a support arm is fixed on the outer wall of the shell for driving the shell to rotate;

[0008] A boss structure is provided on the inner wall of the cavity to form a plurality of slideways facing the center of the shell; a clip is installed in each slideway, and the clip is an arc-shaped structure for matching with the arc-shaped surface of the outer surface of the high locking bolt;

[0009] A threaded hole is provided on the side wall of the housing, a threaded pin is installed in the threaded hole, an end of the threaded pin is inserted into the slideway and contacts the clip; a spring is provided between the clip and the inner side wall of the housing, and the spring is sleeved on the outside of the threaded pin;

[0010] The lower part of the shell is an open structure, and the high locking nut to be removed can be inserted into the center of the shell through the lower end of the shell.

[0011] Furthermore, the end of the threaded pin is processed into an external hexagonal structure, and a pin hole is processed at its end; according to the actual construction environment, a tool is inserted into the pin hole to rotate the threaded pin, or a ratchet wrench is used to rotate the threaded pin in combination with the external hexagonal structure.

[0012] Furthermore, the upper end and the lower end of the screwdriver bit are both external hexagonal structures.

[0013] Furthermore, the outer surface of the clip is provided with a sawtooth groove.

[0014] Furthermore, the clip can move in the slideway in a direction approaching or moving away from the center of the housing.

[0015] Furthermore, the spring in a free state causes the clip to be pulled to a position close to the inner wall of the housing.

[0016] Furthermore, a groove is provided on the side wall of the clip, and the end of the threaded pin is pressed in the groove.

[0017] Furthermore, an annular handle is provided on the upper portion of the holding ring.

[0018] Furthermore, the twist-off high-locking nut to be disassembled is inserted into the shell through the lower part of the shell, and is located in the cavity formed between the clips, and at the same time, the lower end of the screwdriver bit is inserted into the hexagonal groove inside the high-locking bolt; then the hexagonal wrench is used to rotate the threaded pin clockwise to push the clip, and the clip moves toward the outer cylindrical surface of the twist-off high-locking nut in the slideway, so that the aperture formed between the clips becomes smaller, and the twist-off high-locking nut is clamped. The left hand holds the annular handle on the upper part of the holding ring, and the right hand holds the support arm outside the shell and rotates the support arm counterclockwise, and the twist-off high-locking nut is driven to rotate by the clip until the twist-off high-locking nut is removed, and then the threaded pin is rotated counterclockwise to enlarge the aperture formed by the clip under the traction of the spring, and the removed twist-off high-locking nut is removed.

[0019] Compared with the prior art, the present invention has the following technical features:

[0020] The present invention provides a twist-off high-locking nut removal device, which is light in weight, small in size, simple in structure, and easy to use. Different screw bits can be used to remove twist-off high-locking nuts of any specifications. The clamping piece is in an annular clamping form and is provided with a serrated groove. Not only does its shape perfectly match the shape of the self-locking part of the twist-off high-locking nut and increases its friction, the twist-off high-locking nut is subjected to uniform force during removal, and it is not easy to damage the high-locking bolt thread, thus avoiding the scrapping of the high-locking bolt, reducing production costs, and solving the problem that the twist-off high-locking nut is difficult to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the three-view and isometric view of the twist-off high-lock nut removal device;

[0022] Figure 2 It is a cross-sectional view of a twist-off type high lock nut removal device;

[0023] Among them: 1 aircraft structural parts, 2 twist-off high-lock nuts, 3 threaded pins, 4 housings, 5 bearings, 6 holding rings, 7 washers, 8 high-lock bolts, 9 springs, 10 clips, 11 bit sets, and 12 slides. DETAILED DESCRIPTION

[0024] like Figure 1-2 As shown, the present invention provides a twist-off type high lock nut removal device, comprising a housing 4, a holding ring 6, a clip 10 and a screwdriver bit 11, wherein:

[0025] The screwdriver bit 11 is a columnar structure, the lower end of the screwdriver bit 11 is used to cooperate with the inner hexagonal groove of the head of the high locking bolt 8, and the upper end is installed in the inner ring of the bearing 5; the upper and lower ends of the screwdriver bit 11 are both outer hexagonal structures for easy connection;

[0026] The housing 4 is a columnar structure with a boss on the upper part. A cavity is provided inside the housing 4. A bearing hole is provided on the boss on the upper part of the housing. The bearing 5 is installed in the bearing hole. The holding ring 6 is located above the housing 4. The lower end of the holding ring 6 is connected to the inner ring of the bearing 5. A support arm is fixed on the outer wall of the housing 4 for driving the housing 4 to rotate.

[0027] The inner wall of the cavity is provided with a boss structure, forming a plurality of slideways 12 facing the center of the housing 4; each slideway 12 is equipped with a clip 10, which is an arc-shaped structure for matching with the arc-shaped surface of the outer surface of the high locking bolt 8;

[0028] A threaded hole is provided on the side wall of the housing 4, a threaded pin 3 is mounted in the threaded hole, an end of the threaded pin 3 is inserted into the slideway 12, and contacts the clip 10; the clip 10 can move in the slideway 12 in a direction close to or away from the center of the housing 4; a spring 9 is provided between the clip 10 and the inner side wall of the housing 4, and the spring 9 is sleeved on the outside of the threaded pin 3;

[0029] The lower part of the shell 4 is an open structure, and the high locking nut 2 to be removed can be inserted into the center of the shell 4 through the lower end of the shell 4.

[0030] The end of the threaded pin 3 is processed into an external hexagonal structure, and a pin hole is processed at its end; according to the actual construction environment, a tool is inserted into the pin hole to rotate the threaded pin 3, or a ratchet wrench is used to rotate the threaded pin 3 in combination with the external hexagonal structure.

[0031] The outer surface of the clip 10 is provided with a serrated groove, which can better engage with the arc surface of the outer surface of the high locking bolt 8, thereby greatly enhancing the friction between the two.

[0032] The spring 9 pulls the clip 10 to a position close to the inner wall of the housing 4 in a free state. A groove is provided on the side wall of the clip 10, and the end of the threaded pin 3 is pressed in the groove to prevent relative sliding when the threaded pin 3 drives the clip 10 to move; an annular handle is provided on the upper part of the holding ring 6.

[0033] See also Figure 2 , which is a schematic diagram of disassembling a twist-off high-lock nut installed on an aircraft structural part 1; wherein the high-lock bolt 8 passes through the aircraft structural part 1, and the other end is installed with the high-lock bolt 8 through a gasket 7;

[0034] The nut 2 is then tightened by the screwdriver 3 and the screwdriver 3 is engaged to the nut 2, and the nut 2 is then tightened by the screwdriver 3. The nut 2 is then tightened by the screwdriver 3 and the nut 2 is then tightened.

[0035] The twist-off high-lock nut removal device has the advantages of simple structure, convenient operation, lightness and flexibility, and can remove twist-off high-lock nuts of any specifications by replacing screwdriver bits of different specifications and cooperating with the inner hexagonal groove of the high-lock bolt.

Claims

1. A twist-off high lock nut removal device, characterized in that: It comprises a housing (4), a holding ring (6), a clamp (10) and a screwdriver bit (11), wherein: The screwdriver bit (11) is a columnar structure, the lower end of the screwdriver bit (11) is used to cooperate with the hexagonal groove inside the head of the high-locking bolt (8), and the upper end is installed in the inner ring of the bearing (5); The housing (4) is a columnar structure with a boss on the upper part. A cavity is arranged inside the housing (4). A bearing hole is arranged on the boss on the upper part of the housing. The bearing (5) is installed in the bearing hole. The holding ring (6) is located above the housing (4). The lower end of the holding ring (6) is connected to the inner ring of the bearing (5). A support arm is fixed on the outer wall of the housing (4) for driving the housing (4) to rotate. A boss structure is provided on the inner wall of the cavity to form a plurality of slideways (12) facing the center of the housing (4); each slideway (12) is equipped with a clip (10), and the clip (10) is an arc-shaped structure for matching with the arc-shaped surface of the outer surface of the high locking bolt (8); A threaded hole is provided on the side wall of the housing (4), a threaded pin (3) is mounted in the threaded hole, an end of the threaded pin (3) is inserted into the slideway (12) and contacts the clamp (10); a spring (9) is provided between the clamp (10) and the inner side wall of the housing (4), and the spring (9) is sleeved on the outside of the threaded pin (3); The lower part of the shell (4) is an open structure, and the high lock nut (2) to be removed can be inserted into the center of the shell (4) through the lower end of the shell (4).

2. The twist-off type high lock nut removal device according to claim 1 is characterized in that: The end of the threaded pin (3) is processed into an external hexagonal structure, and a pin hole is processed at the end; according to the actual construction environment, a tool is inserted into the pin hole to rotate the threaded pin (3), or a ratchet wrench is used to cooperate with the external hexagonal structure to rotate the threaded pin (3).

3. The twist-off high lock nut removal device according to claim 1 is characterized in that: The upper end and the lower end of the screwdriver bit (11) are both external hexagonal structures.

4. The twist-off type high lock nut removal device according to claim 1, characterized in that: The outer surface of the clip (10) is provided with a sawtooth groove.

5. The twist-off type high lock nut removal device according to claim 1, characterized in that: The clip (10) can move in the slideway (12) in a direction approaching or moving away from the center of the housing (4).

6. The twist-off type high lock nut removal device according to claim 1, characterized in that: The spring (9) in a free state pulls the clip (10) to a position close to the inner wall of the housing (4).

7. The twist-off type high lock nut removal device according to claim 1, characterized in that: A groove is provided on the side wall of the clamping piece (10), and the end of the threaded pin (3) is pressed into the groove.

8. The twist-off high lock nut removal device according to claim 1, characterized in that: The twist-off high lock nut (2) to be disassembled is inserted through the lower part of the housing (4) into the housing (4) and located in the cavity formed between the clips (10), and at the same time, the lower end of the screwdriver bit (11) is inserted into the hexagonal groove inside the high lock bolt (8); then, the threaded pin (3) is turned clockwise with an inner hexagonal wrench to push the clip (10), and the clip (10) moves toward the outer cylindrical surface of the twist-off high lock nut (2) in the slideway (12), so that the cavity formed between the clips (10) is The hole diameter becomes smaller, and the twist-off high-locking nut (2) is clamped. The left hand holds the annular handle on the upper part of the holding ring (6), and the right hand holds the support arm outside the shell (4) and rotates the support arm counterclockwise, driving the twist-off high-locking nut (2) to rotate through the clamping piece (10) until the twist-off high-locking nut (2) is removed, and then the threaded pin (3) is rotated counterclockwise to enlarge the hole diameter formed by the clamping piece (10) under the traction of the spring (9), and the removed twist-off high-locking nut (2) is removed.

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