CN216951228U

CN216951228U - Bolted connection double insurance rotation stopping structure

Info

Publication number: CN216951228U
Application number: CN202122284286.9U
Authority: CN
Inventors: 陈云; 郭初阳; 孙琳; 吕意
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2021-09-21
Filing date: 2021-09-21
Publication date: 2022-07-12
Anticipated expiration: 2031-09-21

Abstract

The application belongs to the aircraft part structure technology, and in particular relates to a bolted connection double-insurance rotation stopping structure. The part organism makes the part pretension through being connected with nut screw thread, is equipped with the gasket between part and the nut, is provided with the split pin groove on the nut, is provided with the split pin hole on the part organism, and the split pin passes through split pin groove and split pin hole restriction nut and relative part organism rotation. The gasket and the part machine body are provided with stop key teeth at corresponding positions, and the stop key teeth are meshed to prevent the gasket from rotating relative to the part machine body. And then guarantee that the nut can not loosen or screw under high-speed environment, and then guaranteed that the pretightning force of bolt can not change, simple structure is compact simultaneously, and processing is simple and easy feasible, has wide application prospect.

Description

Bolted connection double insurance rotation stopping structure

Technical Field

The application belongs to the aircraft part structure technology, and in particular relates to a bolted connection double-insurance rotation stopping structure.

Background

The anti-loose form of nut that adopts when fixed part in the country has mainly that the split pin is anti-loose, locking gasket is anti-loose etc. and these anti-loose forms generally only have one locking insurance, and the nut takes place relative rotation with the organism easily when receiving great friction torque, has not hard up the risk.

SUMMERY OF THE UTILITY MODEL

The task and the purpose of the invention are to provide a bolt connection double-insurance stopping form, which can add a stopping safety device on the basis of the existing bolt connection single-insurance stopping mechanism to realize a stopping double-insurance mechanism and achieve the purpose of improving the fastening reliability and the safety of parts

A bolt connection double-insurance rotation stopping structure comprises a part machine body, a nut, a gasket and a split pin; the part organism makes the part pretension through being connected with nut screw thread, is equipped with the gasket between part and the nut, is provided with the split pin groove on the nut, is provided with the split pin hole on the part organism, and the split pin passes through split pin groove and split pin hole restriction nut and relative part organism rotation. The gasket is provided with inner stop key teeth, the corresponding position of the part machine body is provided with outer stop key teeth, and the stop key teeth of the inner stop key teeth and the outer stop key teeth are meshed to prevent the gasket from rotating relative to the part machine body.

Preferably, the inner stop key teeth are circumferentially arranged on the inner surface of the washer, and the outer stop key teeth are circumferentially arranged on the outer surface of the corresponding position of the part body.

Preferably, the length of the internal stop spline teeth on the shim is one-half of the length of the shim. The length of the external stop key teeth on the part body is greater than the length of the internal stop key teeth on the gasket.

Preferably, the stop key teeth are manufactured to a gear standard.

Preferably, the bolt connection double-insurance rotation stopping structure is used in an environment with the rotating speed of a part machine body being 1000-3000 r/min.

Preferably, the length of the gasket is not less than 20mm, and the thickness of the gasket is 5-10 mm.

Preferably, the gasket material is a metal with a brinell hardness of less than 200.

The advantages are that: 1. the invention skillfully arranges the locking structure between the gasket and the machine body, and the locking structure and the safety pin on the nut form a locking double-safety mechanism, thereby effectively avoiding the rotation between the nut and the machine body and reducing the loosening risk.

2. The locking key teeth are respectively arranged on the part machine body and the gasket for the first time, so that relative rotation cannot occur between the part machine body and the gasket, and the locking key teeth and the gasket are used as a new safety mode, are double-safety with a safety pin group on a nut, are simple to install and are easy to realize in structure.

3. The bolt connection double-safety rotation stopping mode has the characteristics of simple and compact structure, novel mechanism, simple and feasible part processing and the like, and has wide application prospect.

Drawings

Fig. 1 is an exploded schematic view of a bolt connection double-safety rotation stopping structure of the present application.

Fig. 2 is an assembly schematic diagram of the bolt connection double-insurance rotation stopping structure of the application.

The part comprises a part body 1, a stop key tooth 2, a split pin hole 3, a gasket 4, a split pin 5, a nut 6 and a split pin groove 7.

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. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

As shown in fig. 1, the bolt connection double-insurance rotation stopping structure comprises a part body 1, a nut 6, a gasket 4 and a cotter pin 5; the part machine body 1 is in threaded connection with the nut 6 to enable the part to be pre-tightened, the gasket 4 is arranged between the part and the nut, the nut 6 is provided with a split pin groove 7, the part machine body 1 is provided with a split pin hole 3, and the split pin 5 limits the nut 6 to rotate relative to the part machine body 1 through the split pin groove 7 and the split pin hole 3. The gasket 4 is provided with inner stop key teeth 2b, the corresponding position of the part machine body 1 is provided with outer stop key teeth 2a, and the stop key teeth 2 of the inner stop key teeth and the outer stop key teeth are meshed to prevent the gasket 4 from rotating relative to the part machine body 1.

Under the condition of high-speed rotation of bolt and part, generally in the environment of 1000 ~ 3000r/min of rotational speed, because high-speed to avoid the slight rotation of part to lead to the nut to rotate, and then lead to the pretightning force of nut, the internal locking of gasket can completely cut off the moment of torsion that the part produced, internal locking key tooth 2b is arranged at 4 internal surface circumference of gasket, external locking key tooth 2a is arranged at part organism 1 correspondence position surface circumference, the key tooth of circumference range can be convenient for process the installation, and the cost is saved, if set up the sawtooth at gasket cross-section department and prevent changeing, the part organism that corresponds sets up the ladder boss, and set up the sawtooth cooperation that corresponds with the gasket, though reach the mesh of preventing changeing equally, but the gasket is receiving the restriction along part organism axial motion. In addition, in order to enable the gasket to have a better and wider axial position adjustment range, the length of the outer stop key teeth 2a on the part body 1 is larger than that of the inner stop key teeth 2b on the gasket 4, because the key tooth structure of the gasket can weaken the stress condition of the gasket, the length of the inner stop key teeth 2b on the gasket 4 is half of that of the gasket 4, the length of the gasket 4 is not less than 30mm, and the thickness is 10 mm.

Under the high-speed rotation speed environment, parts can be stressed from all directions, so in order to enable the key teeth to be meshed better, the stop key teeth are designed according to the standard part of the gear, and the stop key teeth can be mutually used under the condition of the same module and the same diameter to become the standard part.

The gasket is connected between the part and the bolt, the surface of the part is very easy to damage due to too high hardness of the gasket, but the key teeth are not easy to manufacture due to non-metallic materials, so that the gasket 4 is made of 20 metal alloy 45% of iron, 24% of nickel, 20% of chromium and a small amount of molybdenum and copper. The maximum operating temperature is recommended not to exceed 760 ℃ to 815 ℃. Is especially suitable for manufacturing equipment resistant to sulfuric acid corrosion, and has the Brinell hardness of about 160.

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 bolt connection double-safety rotation stopping structure comprises a part machine body (1), a nut (6), a gasket (4) and a cotter pin (5); the part machine body (1) is in threaded connection with the nut (6) to enable the part to be pre-tightened, a gasket (4) is arranged between the part and the nut, a split pin groove (7) is formed in the nut (6), a split pin hole (3) is formed in the part machine body (1), the split pin (5) limits the nut (6) to rotate relative to the part machine body (1) through the split pin groove (7) and the split pin hole (3), the part machine body is characterized in that inner locking key teeth (2b) are arranged on the gasket (4), outer locking key teeth (2a) are arranged on corresponding positions of the part machine body (1), and the locking key teeth (2) are meshed to prevent the gasket (4) from rotating relative to the part machine body (1).

2. The bolted double insurance rotation-stopping structure of claim 1, wherein the inner stop key teeth (2b) are arranged circumferentially on the inner surface of the washer (4), and the outer stop key teeth (2a) are arranged circumferentially on the outer surface of the corresponding position of the part body (1).

3. The bolted connection double insurance rotation stop structure of claim 1, wherein the length of the internal stop spline teeth (2b) on the washer (4) is half of the length of the washer (4); the length of the external stop key teeth (2a) on the part machine body (1) is larger than that of the internal stop key teeth (2b) on the gasket (4).

4. The bolted double safety anti-rotation structure of claim 1, characterized in that the stop spline teeth (2) are gear teeth.

5. The bolt connection double insurance rotation stopping structure of claim 1, wherein the bolt connection double insurance rotation stopping structure is used in an environment where the rotation speed of the part body (1) is 1000-3000 r/min.

6. The bolt connection double insurance rotation stopping structure of claim 1, wherein the length of the gasket (4) is not less than 20mm, and the thickness is 5-10 mm.

7. The bolted double safety anti-rotation structure of claim 1, characterized in that the gasket (4) material is metal and has a brinell hardness of less than 200.