Locking anti-retreating device

Abstract

The utility model provides a locking anti-retreating device which comprises a male connector and a female connector in threaded connection with the male connector, external threads are arranged on the outer wall of the male connector, internal threads are arranged on the inner wall of the female connector, the external threads comprise a first bearing face arranged to be in a negative angle, and the internal threads comprise a second bearing face arranged to be in a negative angle. And the first bearing surface is in contact with the second bearing surface at the crest. According to the utility model, the locking force between the internal thread and the external thread can be increased, the external thread is prevented from falling off outwards during rotating and tightening, the male joint and the female joint can still keep a stable locking state under the action of larger external force, and the stability and the reliability of the connection between the male joint and the female joint are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of quick plug locking connector, specifically relates to a locking anti -back device. BACKGROUND

[0002] The quick plug locking mechanism is usually used for quickly connecting and locking two components, which usually comprises a male connector and a female connector, the male connector is inserted into the female connector and connected through threads. The thread type of the external thread on the male connector and the internal thread on the female connector usually adopts one or more of triangle, trapezoid and sawtooth. In actual use of the quick plug locking mechanism, the following disadvantages exist: the male connector and the female connector are connected through the above-mentioned thread type, when screwing, the external thread is easy to fall out, and after screwing, due to the insufficient locking force between the male connector and the female connector, when subjected to a large external force, the locking is easy to fail, affecting the stability and reliability of the tool. SUMMARY

[0003] One purpose of the utility model is to provide a locking anti-back device, so as to increase the locking force between the internal thread and the external thread, avoid the external thread from falling out when rotating and tightening, and keep the stable locking state between the male connector and the female connector when subjected to a large external force, thereby improving the stability and reliability of the connection between the male connector and the female connector.

[0004] According to the utility model, a locking anti-back device is provided, which comprises: a male connector and a female connector threadedly connected with the male connector, an external thread is arranged on the outer wall of the male connector, an internal thread is arranged on the inner wall of the female connector, the external thread comprises a first bearing surface arranged as a negative angle, the internal thread comprises a second bearing surface all arranged as a negative angle, and the first bearing surface and the second bearing surface are in contact at the tooth top.

[0005] In a preferred embodiment, the external thread and the internal thread are both configured as negative angle bias trapezoidal threads.

[0006] In a preferred embodiment, the range of the angle formed by the first bearing surface and the second bearing surface at the tooth bottom is-3° to-5°.

[0007] In a preferred embodiment, the external thread further comprises a first guide surface arranged on one side of the first bearing surface and integrally formed with the first bearing surface through a first flat section, and the internal thread further comprises a second guide surface arranged opposite to the second bearing surface and integrally formed with the second bearing surface through a second flat section, wherein the second flat section and the first flat section are in abutting contact at the tooth top, the first guide surface is arranged as a positive angle, and the second guide surface is arranged as a negative angle.

[0008] In a preferred embodiment, the second bearing surface is parallel to the second guide surface.

[0009] In one preferred embodiment, the male connector is uniformly provided with a plurality of grooves extending in the insertion direction.

[0010] In one preferred embodiment, the male connector is uniformly provided with eight grooves extending in the insertion direction.

[0011] In one preferred embodiment, the male connector is made of 20CrMoTi material.

[0012] In one preferred embodiment, the male connector is configured as a taper with gradually decreasing diameter, and the port of the female connector is configured as an inverted taper with gradually increasing diameter.

[0013] In one preferred embodiment, the internal thread and the external thread have the same taper and pitch.

[0014] The utility model has at least the following technical effects:

[0015] According to the utility model, the male connector and the female connector are provided. The outer wall of the male connector is provided with an external thread, and the inner wall of the female connector is provided with an internal thread. The external thread includes a first bearing surface with a negative angle, and the internal thread includes a second bearing surface with a negative angle. The first bearing surface and the second bearing surface are in contact at the tooth top. The second bearing surface can prevent the first bearing surface from sliding along the surface, thereby increasing the locking force between the internal thread and the external thread. When the external thread is rotated and tightened, the external thread cannot fall off. When a large external force is applied, the male connector and the female connector can still maintain a stable locking state, thereby improving the stability and reliability of the connection between the male connector and the female connector.

[0016] According to the utility model, the male connector is uniformly provided with a plurality of grooves extending in the insertion direction, which can reduce the hardness of the male connector, so that the male connector can be contracted when inserted into the female connector, thereby facilitating the insertion operation.

[0017] According to the utility model, the male connector is configured as a taper with gradually decreasing diameter, and the port of the female connector is configured as an inverted taper with gradually increasing diameter, thereby facilitating the guidance and insertion of the male connector into the female connector, making the separation more smooth, and improving the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The structure of the male connector of the locking anti-backoff device according to one embodiment of the utility model is schematically shown;

[0019] Fig. 2 The structure of the female connector of the locking anti-backoff device according to one embodiment of the utility model is schematically shown;

[0020] Fig. 3 A schematic diagram of the external and internal threads of a locking anti-reverse device according to an embodiment of the present invention is shown.

[0021] In this application, all the accompanying drawings are schematic drawings, used only to illustrate the principle of the present invention, and are not drawn to scale. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the utility model, it should be understood that the terms "outer" and "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figs. 1 to 3 As shown, the locking and anti-retraction device of this utility model includes: a male connector 1 and a female connector 2. The outer wall of the male connector 1 is provided with an external thread 11, and the inner wall of the female connector 2 is provided with an internal thread 21. The male connector 1 is inserted into the interior of the female connector 2, and the external thread 11 and the internal thread 21 are threadedly engaged. The external thread 11 includes: a first bearing surface 111, and the first bearing surface 111 is set to a negative angle. The internal thread 21 includes: a second bearing surface 211, and both second bearing surfaces 211 are set to a negative angle. The first bearing surface 111 and the second bearing surface 211 are in contact at the crest of the external thread 11 and the internal thread 21.

[0026] According to the utility model, provide male joint 1 and female joint 2 of the threaded connection of male joint 1. The outer wall of male joint 1 is provided with external thread 11, and the inner wall of female joint 2 is provided with internal thread 21. Because external thread 11 includes: the first bearing surface 111 of being arranged as negative angle, internal thread 21 includes: the second bearing surface 211 of being arranged as negative angle, and the first bearing surface 111 and the second bearing surface 211 contact at the tooth top, the second bearing surface 211 can prevent the first bearing surface 111 from sliding along its surface, thereby can increase the locking force between internal thread 21 and external thread 11, avoid when rotating and tightening, external thread 11 falls off outward, when being subjected to larger external force, male joint 1 and female joint 2 can still keep stable locking state between them, improve the stability and reliability of the connection between male joint 1 and female joint 2.

[0027] In one or more embodiments, the external thread 11 of the male joint 1 and the internal thread 21 of the female joint 2 are both configured as negative angle bias trapezoidal threads.

[0028] In one or more embodiments, the angle X between the first bearing surface 111 and the second bearing surface 211 at the tooth root of the external thread 11 and the internal thread 21 is in the range of -3° to -5°, so that the second bearing surface 211 can prevent the first bearing surface 111 from sliding along its surface, while facilitating the processing of the external thread 11 and the internal thread 21.

[0029] In one or more embodiments, the external thread 11 further includes a first guide surface 112 disposed on one side of the first bearing surface 111 and integrally formed with the first bearing surface 111 by a first flat section, and the internal thread 21 further includes a second guide surface 212 disposed opposite the second bearing surface 211 and integrally formed with the second bearing surface 211 by a second flat section, wherein the second flat section is in abutting contact with the first flat section at the tooth top, the first guide surface 112 is arranged as a positive angle, and the second guide surface 212 is arranged as a negative angle.

[0030] In one or more embodiments, the second guide surface 212 is parallel to the second bearing surface 211.

[0031] In one or more embodiments, the male joint 1 is uniformly provided with a plurality of grooves 13 extending in the insertion direction. Optionally, the male joint 1 is uniformly provided with eight grooves 13. By providing a plurality of grooves on the male joint 1, the hardness of the male joint 1 can be reduced, so that the male joint 1 can be contracted when inserted into the female joint 2, thereby facilitating the insertion operation.

[0032] In one or more embodiments, the male joint 1 is configured as a taper with a gradually decreasing diameter, and the port of the female joint 2 is configured as an inverted taper with a gradually increasing diameter, so that the male joint 1 can be guided and inserted into the female joint 2, and the separation is more smooth, improving the operation efficiency.

[0033] In one or more embodiments, the male joint 1 is made of 20CrMoTi material, so that the male joint 1 can have plasticity, toughness and hardness.

[0034] In one or more embodiments, the taper and pitch of the internal thread 21 and the external thread 11 are the same, and when the male joint 1 is inserted into the female joint 2 and there is a certain degree of misalignment between the positions of the male joint 1 and the female joint 2, the misalignment can be adjusted by rotating and tightening.

[0035] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A locking anti-retraction device, characterized in that, The utility model relates to a threaded connection, comprising: A male connector and a female connector threadedly connected to the male connector, the outer wall of the male connector is provided with external threads, the inner wall of the female connector is provided with internal threads, the external threads comprise a first load flank provided as a negative angle, the internal threads comprise a second load flank provided as a negative angle, and the first load flank and the second load flank are in contact at the crest.

2. The locking anti-backup device of claim 1, wherein, The external threads and the internal threads are both configured as negative-angle trapezoidal threads.

3. The locking anti-backup device of claim 2, wherein, The angle formed by the first load flank and the second load flank at the root is in the range of -3° to -5°.

4. The locking anti-backup device of claim 1 or 2, wherein The external threads further comprise a first guide flank provided on one side of the first load flank and integrally formed with the first load flank via a first flat section, and the internal threads further comprise a second guide flank provided opposite the second load flank and integrally formed with the second load flank via a second flat section, wherein the second flat section is in abutting contact with the first flat section at the crest, the first guide flank is provided as a positive angle, and the second guide flank is provided as a negative angle.

5. The locking anti- retreat device according to claim 4, characterized in that, The second load flank is parallel to the second guide flank.

6. The locking anti -retreat device according to claim 1 or 2, characterized in that, The male connector is uniformly provided with a plurality of grooves extending in the insertion direction.

7. The locking device according to claim 6, wherein The male connector is uniformly provided with eight grooves extending in the insertion direction.

8. The locking anti- retreat device according to claim 7, characterized in that, The male connector is made of 20CrMoTi material.

9. The locking device according to claim 1, wherein The male connector is configured as a taper with a gradually decreasing diameter, and the port of the female connector is configured as an inverted taper with a gradually increasing diameter.

10. The locking device according to claim 1, wherein The taper and the pitch of the internal threads are the same as those of the external threads.

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