CN113036534A

CN113036534A - Quick-connection small self-locking plug

Info

Publication number: CN113036534A
Application number: CN202110300926.2A
Authority: CN
Inventors: 张国军; 张永刚
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-06-25

Abstract

The invention relates to the field of connectors, and particularly provides a quick-connection small self-locking plug which comprises a plug shell and a connecting nut; the connecting nut is sleeved on the plug shell, and the plug shell is provided with a clamp spring for limiting the axial movement of the connecting nut; a contact element is arranged in the plug shell, and an insulator is arranged between the contact element and the plug shell; the inserting end of the connecting nut is provided with a multi-head internal thread; one end of the connecting nut, which is far away from the plugging end, is provided with a plurality of steel ball holes, springs are arranged in the steel ball holes, and steel balls are arranged at the tops of the springs; a locking retainer ring is arranged between the connecting nut and the clamp spring; the anti-loosening clamping ring is fixed on the plug shell. The plug adopting the self-locking mechanism is good in anti-loosening effect and small in overall dimension, and can meet the use requirements in narrow space.

Description

Quick-connection small self-locking plug

Technical Field

The invention relates to the field of connectors, and particularly provides a quick-connection small self-locking plug which has the characteristics of small volume, vibration resistance and the like.

Background

The threaded connection type circular connector is widely applied to signal connection between equipment and systems in various fields of military use and civil use, generally needs to prevent looseness of a plug and a socket in an environment with vibration or impact load, and further prevents signal interruption caused by separation of the plug and the socket. The common anti-loose mode of the electric connector mainly comprises the steps of making a fuse or using a self-locking plug to prevent looseness. The self-locking plug is convenient to use and operate, but the plug is increased in overall dimension after a self-locking mechanism is added, the miniaturization design is difficult, the dimension possibly cannot meet the requirement under the condition of limited space, for example, the outer diameter of the self-locking plug with the minimum specification specified in GJB599 is

The demand for miniaturization of the connector is wide, and the miniaturization of the connector is also an important direction for the development of the connector.

Disclosure of Invention

The invention aims to solve the technical problem of providing a quick-connection small self-locking plug aiming at the defects of difficult miniaturization design and large overall dimension of the existing self-locking plug.

The technical scheme adopted by the invention is as follows:

a quick-connection small self-locking plug comprises a plug shell and a connecting screw cap; the connecting nut is sleeved on the plug shell, and the plug shell is provided with a clamp spring for limiting the axial movement of the connecting nut;

a contact element is arranged in the plug shell, and an insulator is arranged between the contact element and the plug shell;

the inserting end of the connecting nut is provided with a multi-head internal thread;

one end of the connecting nut, which is far away from the plugging end, is provided with a plurality of steel ball holes, springs are arranged in the steel ball holes, and steel balls are arranged at the tops of the springs;

a locking retainer ring is arranged between the connecting nut and the clamp spring; the anti-loosening clamping ring is fixed on the plug shell.

Furthermore, the outer wall of the plug shell is provided with a convex key, and the inner wall of the anti-loosening clamping ring is provided with a groove matched with the convex key.

Furthermore, the outer wall of the plug shell is provided with an annular groove for installing the clamp spring

Furthermore, a plurality of positioning keys are arranged on the outer wall of the plugging end of the plug shell and are used for being matched with the socket.

Furthermore, one side of the anti-loosening clamping ring, which is close to the connecting nut, is provided with a plurality of ratchets.

Further, the ratchet comprises a first tooth surface, a tooth bottom and a second tooth surface which are connected end to end; the first tooth surface and the tooth bottom are in transition connection through an arc; after the connecting nut rotates 3/4 circles to 1 circle, the steel ball moves to the end part of the second tooth surface from the tooth bottom, and the elastic force of the spring to the steel ball enables the connecting nut to rotate only by a certain torque, so that self-locking is realized.

Furthermore, the tail end of the connecting nut is provided with a limiting wall.

According to the quick connection small self-locking plug, the self-locking mechanism is mainly realized by the ratchet on the end face of the anti-loosening clamping ring, the steel ball and the spring, the self-locking mechanism is arranged along the axial direction of the shell, the miniaturization design is easy, and the outer diameter of the plug is small; in addition, the plug part has a simple structure, does not relate to complex plastic compression parts, and has a simple process and easy realization.

The plug adopting the self-locking mechanism is good in anti-loosening effect and small in overall dimension, and can meet the use requirements in narrow space. And the plug connecting nut is provided with a multi-start thread, and when the plug connecting nut is connected with the socket, the plug connecting nut can be connected in place by rotating 3/4-1 turns, so that the quick connection is realized.

Drawings

FIG. 1 is a three-dimensional schematic view of a quick connect miniature self-locking plug;

FIG. 2 is a schematic view of a coupling nut;

FIG. 3 is a schematic view of a locking collar;

FIG. 4 is a schematic view of a locking collar ratchet;

fig. 5 is a schematic structural view of the plug housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The quick-connection small-sized self-locking plug comprises a plug shell 1, an insulator 2, a clamp spring 3, a locking retainer ring 4, a steel ball 5, a spring 6, a connecting nut 7 and a contact element 8, as shown in fig. 1-5.

The contact element 8 is arranged in the plug shell 1, the insulator 2 is arranged between the contact element 8 and the plug shell 1, and the connecting nut 7 is sleeved on the plug shell 1;

wherein, the front end of the connecting screw cap 7 is provided with three-end threads, and the connecting screw cap rotates about 3/4 circles to be connected with the socket in place; the tail end of the connecting nut is provided with a plurality of steel ball holes 701, and the connecting nut, the spring 6, the steel ball 5, the anti-loosening retainer ring 4, the clamp spring 3 and the plug shell 1 form a self-locking mechanism; the method specifically comprises the following steps: the connecting nut 7 and the locking retainer ring 4 are sequentially sleeved outside the plug shell 1, the locking retainer ring 4 is fixed on the plug shell 1, the spring 6 and the steel ball 5 are placed in the steel ball hole 701 of the connecting nut 7, the steel ball 5 is in contact with one end face of the locking retainer ring 4, and the clamp spring 3 is installed in the annular groove 103 of the plug shell 1, so that the axial positioning and the fixing of all parts in the self-locking mechanism are realized.

Further, the tail end of the connecting nut 7 is provided with a limiting wall 702 for preventing the steel ball 5 from falling off.

Furthermore, the locking collar 4 is designed with a groove 410 inside, a convex key 101 corresponding to the outside of the tail end of the plug housing 1 is designed, the two will not rotate relatively after assembly, and a positioning key 102 matching with the socket is designed at the front end of the plug housing 1 to guide the axial movement when the plug housing 1 is connected with the socket.

Furthermore, the end face of the anti-loosening clamping ring 4 is provided with 13 continuous and complete ratchets 420; the number of the steel ball holes 701 is not more than that of the ratchets 420, the number of the steel ball holes 701 in the embodiment is 6, so that the relative angle between the steel ball holes 701 is integral multiple of the angle of each ratchet 420, and all the steel balls 5 can fall into the lower ends of the ratchets 420 at the same time;

the ratchet 420 comprises a first tooth surface 421, a tooth bottom 422 and a second tooth surface 423 which are connected end to end; the first tooth surface 421 and the tooth bottom 422 are in transition connection through a circular arc; after the connecting nut rotates 3/4-1 turn, the steel ball 5 moves from the tooth bottom 422 to the end of the second tooth surface 423, the elastic force of the spring 6 to the steel ball 5 enables the connecting nut 7 to rotate only by a certain torque, and self-locking is realized;

the included angle alpha between the first tooth surface 421 and the central axis is 30 degrees, the included angle beta between the second tooth surface 423 and the central axis is 75 degrees, and the angle in the connecting direction is larger than that in the separating direction, so that the purpose that the torque in the connecting direction is smaller and the torque in the separating direction is larger is achieved, and the use is convenient; and the relative angle between the 6 steel ball holes is integral multiple of the ratchet angle of each locking retainer ring, so that all the steel balls 5 can fall into the lower end of the ratchet of the locking retainer ring at the same time.

The principle of the quick connection small self-locking plug is as follows:

the steel ball 5 is located at the lower end of the locking collar ratchet 420 under the action of the pre-tightening elastic force of the spring 6, the locking collar 4 and the plug shell 1 cannot rotate relatively through the matching of the convex key 101 and the groove 410, when the screw cap 7 is connected in a rotating mode, the screw cap 7 drives the steel ball 5 to ascend along the tooth surface of the ratchet and further compress the spring 6, the screw cap 7 is connected in a rotating mode under the action of the elastic force of the spring 6 and needs to overcome certain torque, and the plug is self-locked by adopting the principle of increasing the rotating torque. The more the steel balls 5 are, the larger the separation angle is, the larger the required rotation torque is, and the better the self-locking effect is.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. A quick-connection small-sized self-locking plug comprises a plug shell (1) and a connecting nut (7); it is characterized in that; the connecting nut (7) is sleeved on the plug shell (1), and the plug shell (1) is provided with a clamp spring (3) for limiting the axial movement of the connecting nut (7);

a contact element (8) is arranged in the plug shell (1), and an insulator (2) is arranged between the contact element (8) and the plug shell (1);

the inserting end of the connecting nut (7) is provided with a multi-head internal thread;

a plurality of steel ball holes (701) are formed in one end, far away from the inserting end, of the connecting nut (7), springs (6) are arranged in the steel ball holes (701), and steel balls (5) are arranged at the tops of the springs (6);

an anti-loosening clamping ring (4) is arranged between the connecting nut (7) and the clamping spring (3); the anti-loosening clamping ring (4) is fixed on the plug shell (1).

2. The quick connect miniature self-locking plug of claim 1, wherein: the plug is characterized in that a convex key (101) is arranged on the outer wall of the plug shell (1), and a groove (410) matched with the convex key (101) is formed in the inner wall of the anti-loosening clamping ring (4).

3. The quick connect miniature self-locking plug of claim 1, wherein: the plug is characterized in that an annular groove (103) is formed in the outer wall of the plug shell (1) and used for installing the clamp spring (3).

4. The quick connect miniature self-locking plug of claim 1 or 2, wherein: the outer wall of the plugging end of the plug shell (1) is provided with a plurality of positioning keys (102) which are used for being matched with a socket.

5. The quick connect miniature self-locking plug of claim 1 or 2, wherein: and one side of the anti-loosening clamping ring (4) close to the connecting screw cap (7) is provided with a plurality of ratchets (420).

6. The quick connect miniature self-locking plug of claim 5, wherein: the ratchet (420) comprises a first tooth surface (421), a tooth bottom (422) and a second tooth surface (423) which are connected end to end; the first tooth surface (421) and the tooth bottom (422) are in transition connection through a circular arc; after 3/4-1 circles of rotation of the connecting nut, the steel ball (702) moves to the end of the second tooth surface (423) from the tooth bottom (422), and the elastic force of the spring (6) on the steel ball (5) enables the connecting nut (7) to rotate only with a certain torque, so that self-locking is realized.

7. The quick connect miniature self-locking plug of claim 1, wherein: and the tail end of the connecting nut (7) is provided with a limiting wall (702).