CN112478138A

CN112478138A - Anti-loosening pull rod and mounting method thereof

Info

Publication number: CN112478138A
Application number: CN202011402344.7A
Authority: CN
Inventors: 于慧; 郑金磊; 赵忠锐; 宋志军; 于静
Original assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Current assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-12
Anticipated expiration: 2040-12-04
Also published as: CN112478138B

Abstract

The application provides a locking pull rod, locking pull rod includes: the wall of the main body pipe is provided with an axially extending limiting groove; the adjustable earring joint is provided with an external thread, and the outer wall surface of the adjustable earring joint is provided with an axially extending chute; the limiting block is arranged in the sliding groove and provided with an installation groove; the locking nut is used for being matched with the external thread of the adjustable earring joint and is arranged in the mounting groove; when the main body pipe is adjusted to a proper length through thread fit with the adjustable earring joint, the locking nut is rotated to enable the limiting block to move in the sliding groove, and the side of the limiting block is inserted to enable the limiting block to fall into the limiting groove. The application provides a locking pull rod can effectual assurance pull rod realize locking function, and in pull rod length adjustment work, except changing the fuse, all the other parts all need not to be changed, and easy and simple to handle and reliability are high.

Description

Anti-loosening pull rod and mounting method thereof

Technical Field

The application belongs to the technical field of aircraft structure design, and particularly relates to an anti-loosening pull rod and an installation method thereof.

Background

Tie rod structures are widely used in aircraft construction to connect two components. For example, in a passive driving control device, the transmission of pilot control force and control displacement is realized by means of a mechanical transmission chain, a pull rod is an essential component in the mechanical transmission chain, the length adjustment is possible in assembly and use, and after the adjustment, reliable anti-loosening setting, such as insurance or spot welding fixing, must be carried out on the pull rod so as to prevent the potential safety hazard caused by the length change or strength reduction of the pull rod due to the loosening of a locking component, and even the airplane control failure due to loosening.

Disclosure of Invention

It is an object of the present application to provide a check link that solves or mitigates at least one of the problems of the background art.

The technical scheme of the application is as follows: an anti-loosening tie rod, comprising:

the wall of the main body pipe is provided with an axially extending limiting groove;

the adjustable earring joint is provided with an external thread, and the outer wall surface of the adjustable earring joint is provided with an axially extending chute;

the limiting block is arranged in the sliding groove and provided with an installation groove; and

the locking nut is used for being matched with the external thread of the adjustable earring joint and is arranged in the mounting groove;

when the main body pipe is adjusted to a proper length through thread fit with the adjustable earring joint, the locking nut is rotated to enable the limiting block to move in the sliding groove, and the side of the limiting block is inserted to enable the limiting block to fall into the limiting groove.

Furthermore, the safety device further comprises a fuse, and the fuse is connected with the locking nut and the limiting block.

Further, the cross section of the sliding groove is rectangular, semicircular or triangular.

Furthermore, the main body pipe is provided with at least one section for limiting the rotation of the main body pipe.

In addition, the application also provides an installation method of any one of the anti-loosening pull rods, and the method comprises the following steps:

firstly, a locking nut is arranged in an installation groove of a limiting block;

then, the adjustable earring joint is matched with a locking nut, and the locking nut is rotated to enable the limiting block to move towards the end head of the adjustable earring joint;

installing the adjustable earring joint and the main pipe to a proper position through thread matching;

and finally, rotating the locking nut to enable the limiting block to move towards the limiting groove on the main body pipe and enable the limiting block to enter the limiting groove.

Furthermore, the method also comprises the step of arranging a fuse, so that the fuse penetrates through the locking nut and the fuse hole in the limiting block and is wound around the fuse, so that the locking nut and the limiting block are relatively fixed.

The application provides a locking pull rod can effectual assurance pull rod realize locking function, and in pull rod length adjustment work, except changing the fuse, all the other parts all need not to be changed, and easy and simple to handle and reliability are high.

Drawings

In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.

FIG. 1 is a schematic structural view of a locking pull rod of the present application;

FIG. 2 is a schematic view of an adjustable earring fitting, a locking nut with a safety hole, and a key installation of the present application;

FIG. 3 is a schematic view of the assembly of the adjustable earring connector of the present application with a pipe;

FIG. 4 is a schematic view of the locknut with a safety hole according to the present application after being locked;

fig. 5 is a schematic diagram of a fuse anti-loose style of the present application.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.

As shown in fig. 1 to 5, the anti-loosening pull rod provided by the present application mainly includes a main tube 1, a lock nut 2, a limit block 3, and an adjustable earring joint 4.

The main body pipe 1 has an inner hole at one end, an internal thread 11 is arranged in the inner hole, and a limit groove 13 extending axially is arranged on the wall of the inner hole section of the main body pipe 1. The adjustable earring joint 4 has an external thread 41 on the rod body for matching with the internal thread of the main tube 1, so that the main tube 1 and the adjustable earring joint 4 can move relatively in the length direction (i.e. axial direction). An axially extending slide groove 42 is also provided on the outer surface of the rod body of the adjustable earring joint 4. A limiting block 3 is arranged in the sliding groove, an installation groove 31 is formed in the middle of the limiting block 3, and a locking nut 2 is installed in the installation groove 31. When the main body pipe 1 and the adjustable earring joint 4 rotate to a proper length through threads, the locking nut 2 is rotated to drive the limiting block 3 to slide in the sliding groove 41, so that the limiting block 3 is clamped into the limiting groove 13 of the main body pipe 1, and therefore it can be ensured that the main body pipe 1 and the adjustable earring joint 4 cannot rotate relative to each other.

Furthermore, in order to prevent the limiting block 3 and the locking nut 2 from moving in a small range, the fuse 5 is further arranged in the application, after the locking nut 2 sends the limiting block 3 into the limiting groove 13, the locking nut 2 with the fuse hole and the limiting block 3 are fixed through the fuse 5, and it is ensured that the locking nut 2 cannot rotate along the axis.

In some embodiments of the present application, the cross-section of the chute may be rectangular, semi-circular, triangular, or other shape.

In this application, be equipped with at least one tangent plane 12 on the main part pipe 1, tangent plane 12 can make things convenient for spanner etc. to exert the rotational moment to it at the relative rotation in-process of main part pipe 1 and adjustable earring joint 4.

In addition, the application also provides an installation method of the anti-loosening pull rod, which specifically comprises the following steps.

S1, when the locking nut 2 is installed, the locking nut is firstly placed in the installation groove 31 of the limiting block 3.

S2, the locking nut 2 disposed in the mounting groove 13 is then rotated in cooperation with the adjustable earring joint 4, and the stopper 3 is moved toward the right end (the end away from the end engaged with the main tube 1) of the adjustable earring joint 4 by rotating the locking nut 2.

And S3, mounting the adjustable earring joint 4 and the main pipe 1 in a threaded fit manner, and rotating the adjustable earring joint 4 or the main pipe 1 to adjust the relative positions of the two parts so as to enable the pull rod to reach the proper length.

S4, finally, the locking nut 2 is rotated to enable the limiting block 3 to move towards the limiting groove 13 on the main body pipe 1, and the limiting block 3 enters the limiting groove 13. In the process of enabling the limiting block 3 to enter the limiting groove 13, the adjustable earring joint 4 or the main body pipe 1 can be properly rotated according to needs, so that the sliding groove 41 of the adjustable earring joint 4 is approximately aligned with the limiting groove 13.

After the limiting groove 13 of the limiting block 3, the further looseness prevention can be realized through the fuse 5. For example, the fuse 5 is passed through the safety holes of the lock nut 2 and the stopper 3, and the fuse 5 is wound to relatively fix the lock nut 2 and the stopper 3.

The above process is the installation process of the anti-loosening pull rod of the application. It can be understood that besides the installation of the anti-loosening pull rod in use, the anti-loosening pull rod also has the problems of adjustment in use or disassembly after use and the like. The following will briefly describe the adjustment of the length of the anti-loosening tie bar in use.

When the length of the anti-loosening pull rod needs to be adjusted, if the fuse 5 is arranged during installation, the fuse 5 is firstly cut off, and then the loosened locking nut 2 is rotated to drive the limiting block 3 to move in the sliding groove 41 of the adjustable earring joint 4.

After the locking nut 2 drives the limiting block 3 to exit from the limiting groove 13 of the main body pipe 1, the adjustable earring joint 4 can rotate, so that the length of the anti-loosening pull rod can be adjusted.

After the length adjustment of the anti-loosening pull rod is completed, the locking nut 2 is rotated to drive the limiting block 3 to move until the limiting block 3 is embedded into the limiting groove 13 of the main body pipe 1 again.

And finally, after the fuse 5 penetrates through the fuse hole of the limiting block 3, the two fuses are mutually wound to the fuse hole position of the locking nut 2, the two fuses penetrate through the fuse hole of the locking nut 2 and are mutually wound, the length of the final wound section is kept to be (3-4) mm, and the rest fuses are cut off.

The locking pull rod of this application compares and utilizes the deformation of insurance gasket to ensure not taking place relative pivoted pull rod scheme between lock nut and the main part pipe among the prior art, need to change insurance gasket after adjustment pull rod length, utilize the stopper to guarantee not taking place relative rotation between the adjustable earring joint of pull rod and the main part pipe in this application, the while is fixed with the position of stopper by the lock nut who takes the insurance hole, prevent that the stopper from leaving the latched position and leading to locking function to become invalid, it is fixed with stopper and lock nut to utilize the fuse at last, prevent that lock nut is not hard up. In the pull rod adjusting work, except for replacing the fuse, other parts do not need to be replaced, the operation is simple and convenient, and the reliability is high.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A check link, comprising:

the main body pipe (1) is provided with internal threads (11), and the wall of the main body pipe (1) is provided with a limit groove (13) extending axially;

an adjustable earring joint (4) with external threads (41), wherein the outer wall surface of the adjustable earring joint (4) is provided with an axially extending sliding groove (42);

the limiting block (3) is arranged in the sliding groove (42), and the limiting block (3) is provided with an installation groove (31); and

the locking nut (2) is used for being matched with the external thread of the adjustable earring joint (4), and the locking nut (2) is arranged in the mounting groove (31);

when main part pipe (1) and adjustable earring connect (4) to adjust to suitable length through screw-thread fit, rotate lock nut (2) makes stopper (3) remove in spout (42), and the side is gone into and is made stopper (3) fall into in spacing groove (13).

2. Anti-loose tie rod according to the claims, characterized in that it further comprises a fuse (5), said fuse (5) connecting the locknut (2) and the stop block (3).

3. The anti-loosening tie rod according to claim 1, wherein the cross section of the runner is rectangular, semicircular or triangular.

4. Anti-loose pull rod according to claim 1, characterized in that the main tube (1) is provided with at least one cut surface (12) for limiting the rotation of the main tube (1).

5. A method of installing a check rod according to any of claims 1 to 4, the method comprising:

firstly, the locking nut (2) is arranged in the mounting groove (31) of the limiting block (3);

then the adjustable earring joint (4) is matched with the locking nut (2), and the locking nut (2) is rotated to enable the limiting block (3) to move towards the end head of the adjustable earring joint (4);

the adjustable earring joint (4) and the main pipe (1) are installed to a proper position in a threaded fit mode;

and finally, the locking nut (2) is rotated to enable the limiting block (3) to move towards the direction of a limiting groove (13) on the main body pipe (1), and the limiting block (3) enters the limiting groove (13).

6. The method for installing the anti-loose pull rod according to claim 5, further comprising the steps of installing a fuse (5), enabling the fuse (5) to penetrate through the safety holes in the locking nut (2) and the limiting block (3), and winding the fuse (5) to enable the locking nut (2) and the limiting block (3) to be fixed relatively.