Spring buckle type anti-explosion motor plug anti-dropping device

Abstract

The utility model relates to the technical field of explosion -proof motor connection, concretely is a spring buckle formula explosion -proof motor plug bolt anti -drop device, including plug -in portion and socket portion, the connecting end of plug -in portion is equipped with the plug -in post, the inside of socket portion's connecting end is equipped with the plug -in hole, the connecting end outer wall of plug -in portion is equipped with a plurality of buckle seat around, the inside of buckle seat is equipped with the elastic buckle piece that can overturn and along the elastic displacement of plug -pull direction, and the connecting end outer wall of socket portion is equipped with a plurality of docking seat around, the inside of docking seat all is equipped with the positioning post that is opposite to the elastic buckle piece. This spring buckle formula explosion -proof motor plug bolt anti -drop device strengthens the self -adaptability and reliability, has realized convenient installation and maintenance, effectively prevented the plug bolt drop, improved the stability and security of long -term use simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof motor connection technology, specifically a spring-clip type explosion-proof motor plug anti-detachment device. Background Technology

[0002] Explosion-proof motors are widely used in flammable and explosive environments such as coal mines, chemical plants, and petroleum plants to ensure the safety of equipment operation. The junction box of an explosion-proof motor is typically electrically connected to an external power source via a plug. To prevent accidents caused by accidental plug detachment due to vibration, impact, or other reasons, a specialized anti-detachment device must be used to enhance the reliability of the connection between the plug and the junction box.

[0003] Currently, most explosion-proof motor plugs on the market use threaded fixing or simple elastic retaining rings for limiting. Although these can prevent the plugs from falling off to a certain extent, their structure is complex, inconvenient to install, and the elastic components are prone to fatigue failure after long-term use, resulting in a decrease in the anti-loosening effect. Furthermore, existing snap-fit ​​structures often lack self-adjusting functions, making it difficult to cope with plug connections of different sizes or tolerance ranges, resulting in insufficient tightness and certain safety hazards. Therefore, there is an urgent need for an explosion-proof motor plug anti-loosening device with a simple structure, high reliability, and easy maintenance to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a spring-loaded snap-on explosion-proof motor plug anti-detachment device to solve the problems mentioned in the background art, such as complex connection structure, poor anti-detachment effect, inconvenient installation and maintenance, and unreliable connection caused by easy failure of elastic components after long-term use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spring-loaded explosion-proof motor plug anti-disengagement device, comprising a plug part and a socket part. The plug part has a plug-in post at its connecting end, and the socket part has a plug-in hole inside its connecting end. A plurality of buckle seats are arranged around the outer wall of the plug part's connecting end. The buckle seats have elastic buckle members inside that can be flipped and generate elastic displacement along the insertion and removal direction. A plurality of mating seats are arranged around the outer wall of the socket part's connecting end. Each mating seat has a positioning post inside that is opposite to the elastic buckle member. The elastic buckle members and positioning posts together form a ring-shaped locking anti-disengagement mechanism on the outer wall of the plug part and the socket part's connecting end.

[0006] Preferably, there are four of each of the buckle seats and docking seats, and the positions of the buckle seats and docking seats correspond one-to-one.

[0007] Preferably, the lower end of the buckle seat is provided with a tension block, and the inner end of the elastic buckle is connected to the bottom of the tension block through a pivot pin. The upper end of the buckle seat is provided with a fixing block, and the fixing block and the tension block are connected by a tension spring.

[0008] Preferably, the elastic buckle has an overall U-shaped structure and its outer end has a bent structure, and the positioning posts are distributed at an angle on the mating seat. The bottom of the positioning posts is also provided with an arc-shaped slot that matches the outer end structure of the elastic buckle.

[0009] Preferably, the outer walls of the two sides of the plug are provided with arc-shaped openings, and elastic telescopic members are provided in the arc-shaped openings of the outer walls of the two sides of the plug. A snap-fit ​​arm is fixed on the outer side of the elastic telescopic member, and the inner walls of the two sides of the plug hole are provided with snap-fit ​​grooves that match the structure of the snap-fit ​​arm.

[0010] Preferably, all the snap-fit ​​arms extend outside the arc-shaped opening on the outer wall of the plug post, and both the upper and lower ends of the snap-fit ​​arms have an arc-shaped transition structure.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This spring-loaded snap-fit ​​explosion-proof motor plug anti-detachment device enhances adaptability and reliability, achieves convenient installation and maintenance, effectively prevents plug detachment, and improves long-term stability and safety. Through the cooperative design of the elastic snap-fit ​​component and the positioning post, combined with the one-to-one correspondence between the snap-fit ​​seat and the docking seat, the device provides an automatic locking function during insertion. Furthermore, the linkage structure of the tension spring and the tension block ensures the stable reset of the elastic snap-fit ​​component during insertion and removal. The design of the snap-fit ​​arm and the elastic telescopic component further enhances the pull-out resistance of the insertion connection, thus maintaining a reliable connection even under complex working conditions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a spring-clip type explosion-proof motor plug anti-dislodgement device according to the present invention;

[0013] Figure 2 This is a schematic diagram of the external structure connecting the plug and socket of a spring-clip type explosion-proof motor plug anti-dislodgement device according to this utility model;

[0014] Figure 3 This is a schematic diagram of the bottom structure of the plug part of a spring-clip type explosion-proof motor plug anti-dislodgement device according to this utility model;

[0015] Figure 4 This is a schematic diagram of the top structure of the socket section of a spring-clip type explosion-proof motor plug anti-dislodgement device according to this utility model.

[0016] In the diagram: 1. Plug part; 2. Socket part; 3. Plug post; 4. Plug hole; 5. Elastic telescopic component; 6. Snap-fit ​​arm; 7. Snap-fit ​​seat; 8. Elastic snap-fit ​​component; 9. Connecting seat; 10. Positioning post; 11. Fixing block; 12. Tension spring; 13. Tension block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution: a spring-loaded explosion-proof motor plug anti-dislodgement device, comprising a plug part 1 and a socket part 2. A connecting flange is welded and fixed to the bottom end of the socket part 2. A plug post 3 is welded and fixed to the connecting end of the plug part 1. A plug hole 4 is provided inside the connecting end of the socket part 2. Several buckle seats 7 are welded and fixed around the outer wall of the connecting end of the plug part 1. The buckle seats 7 have a U-shaped structure and contain elastic buckling elements 8 that can be flipped and elastically displaced along the insertion / removal direction. Several mating seats 9 are welded and fixed around the outer wall of the connecting end of the socket part 2. Both the mating seats 9 and the buckle seats 7 have U-shaped structures. Positioning posts 10, which are opposite to the elastic buckling elements 8, are welded and fixed inside the mating seats 9. The elastic buckling elements 8 and the positioning posts 10... A locking and anti-disengagement mechanism is formed on the outer walls of the connecting ends of the plug part 1 and the socket part 2, arranged in a ring. The plug part 1 is inserted into the plug hole 4 of the socket part 2 via the insertion post 3, completing the initial insertion and engagement. Simultaneously, multiple latching seats 7 arranged around the outer wall of the connecting end of the plug part 1 and multiple mating seats 9 correspondingly arranged on the outer wall of the connecting end of the socket part 2 form an alignment layout. The elastic latching element 8 inside the latching seat 7 can elastically displace and flip in the insertion and removal direction. That is, when the plug part 1 is fully inserted into the socket part 2, the elastic latching element 8 and the positioning post 10 form a locking engagement, thereby achieving a self-locking function after the insertion and connection. This structure, through the linkage between the elastic latching element 8 and the positioning post 10, can prevent the plug part 1 from being pulled out during insertion and removal. The automatic adaptation to changes in the plugging state improves the tightness and stability of the plugging connection, effectively preventing unexpected detachment caused by vibration or external force. It solves the problems of complex plugging connections in existing explosion-proof motors, inconvenient installation, fatigue failure of elastic components after long-term use, poor anti-detachment effect, and lack of adaptive adjustment function, leading to loose connections and safety hazards. Each of the snap-fit ​​seats 7 and docking seats 9 has four snap-fit ​​seats, and their positions correspond one-to-one. In this structure, the elastic snap-fit ​​element 8 in each snap-fit ​​seat 7 can accurately align and stably cooperate with the positioning post 10 in the corresponding docking seat 9, forming a uniformly distributed four-point locking structure. This ensures balanced plugging force and a firm connection, avoiding instability or detachment risks caused by localized stress concentration. This design improves the overall structural symmetry and assembly precision, enhances the reliability and vibration resistance of the explosion-proof motor plug connection, and provides a tension block 13 at the lower end of the buckle seat 7. The inner end of the elastic buckle 8 is connected to the bottom of the tension block 13 via a pivot pin. A fixing block 11 is located at the upper end of the buckle seat 7, and the fixing block 11 is connected to the tension block 13 via a tension spring 12. When the elastic buckle 8 is compressed into the buckle seat 7 by an external force, its inner end moves the tension block 13 downwards via the pivot pin. The tension spring 12 between the tension block 13 and the fixing block 11 is stretched and accumulates elastic restoring force. After insertion, the elastic buckle 8, after the external force is released, drives the tension block 13 to reset via the rebound action of the tension spring 12.This causes the elastic fastener 8 to quickly return to the locked position, achieving stable engagement with the positioning post 10 in the docking seat 9. The elastic fastener 8 has a U-shaped structure with a bent outer end, and the positioning post 10 is inclined on the docking seat 9. The bottom of the positioning post 10 is also provided with an arc-shaped notch that matches the outer end structure of the elastic fastener 8. This structure allows the elastic fastener 8 to form a guiding engagement with the inclined positioning post 10 on the docking seat 9 during the insertion process. As the insertion action proceeds, the elastic fastener 8 gradually compresses and moves inward. When the insertion is complete, the elastic latch 8 returns to its original position, and its outer end accurately embeds into the arc-shaped slot at the bottom of the positioning post 10, achieving stable locking. This makes the insertion process smoother and provides good self-alignment capability and locking reliability, effectively preventing loosening and unexpected disengagement. Arc-shaped openings are provided on both sides of the outer wall of the insertion post 3, and elastic telescopic components 5 are provided within these arc-shaped openings. The elastic telescopic component 5 consists of an elastic rubber pad and an outer end block. A latching arm 6 is welded and fixed to the outer side of the elastic telescopic component 5, and the two sides of the insertion hole 4... The inner walls of both sides are provided with locking grooves that match the structure of the locking arms 6. During the insertion of the plug-in post 3 into the plug-in hole 4, the elastic telescopic members 5 on both outer walls cause the locking arms 6 to retract into the arc-shaped opening. As the insertion is completed, the locking arms 6 pass over the transition area of ​​the inner wall of the plug-in hole 4 and pop outwards under the action of the elastic telescopic members 5, accurately embedding into the corresponding locking grooves on the inner wall of the plug-in hole 4. This achieves auxiliary locking between the plug-in post 3 and the plug-in hole 4, enhancing the stability and pull-out resistance of the connection, thereby further preventing damage during insertion. To prevent loosening or detachment caused by external vibration or misoperation, the locking arms 6 extend beyond the arc-shaped opening on the outer wall of the insertion post 3. Both the upper and lower ends of the locking arms 6 feature an arc-shaped transition structure. This structure allows the locking arms 6 to contact the inner wall of the insertion hole 4 first during insertion, generating elastic compression. Simultaneously, the arc-shaped transition structures at both ends of the locking arms 6 act as guides and buffers during insertion, reducing insertion resistance and guiding the locking arms 6 smoothly into the locking groove. This improves insertion smoothness and enhances the engagement stability between the locking arms 6 and the locking groove.

[0019] Working principle: When using this spring-loaded explosion-proof motor plug anti-dislodgement device, first align the plug pin 3 of the plug part 1 with the plug hole 4 of the socket part 2, and apply a pushing force to gradually insert the plug pin 3 into the plug hole 4. During this process, the locking arm 6 first contacts the inner wall of the plug hole 4 and is compressed. Under the action of external force, the locking arm 6 retracts into the arc-shaped opening on the plug pin 3, and at the same time, the elastic telescopic member 5 is compressed. As the insertion action continues, when the locking arm 6 moves to the position corresponding to the locking groove in the plug hole 4, the elastic telescopic member 5 releases its elastic force, pushing... The snap-fit ​​arm 6 pops outward and embeds into the snap-fit ​​groove to complete the auxiliary locking. At the same time, the snap-fit ​​seat 7 gradually approaches the docking seat 9, and then flips and stretches the elastic snap-fit ​​member 8 in the insertion and removal direction. The elastic snap-fit ​​member 8 generates elastic displacement and flipping action, so that the tension spring 12 between the fixed block 11 and the tension block 13 is stretched and stored. When the outer end of the elastic snap-fit ​​member 8 is snapped into the positioning post 10, the elastic snap-fit ​​member 8 is released. Under the action of the rebound force of the tension spring 12, the elastic snap-fit ​​member 8 drives the tension block 13 to reset, realizing the locking function, thereby completing a series of operations.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spring-loaded snap-fit ​​explosion-proof motor plug anti-dislodgement device, comprising a plug part (1) and a socket part (2), wherein the connecting end of the plug part (1) is provided with a plug post (3), and the connecting end of the socket part (2) is provided with a plug hole (4), characterized in that: The outer wall of the connector end of the plug (1) is surrounded by several latching seats (7). The latching seats (7) are provided with elastic latching members (8) that can be flipped and generate elastic displacement along the insertion and removal direction. The outer wall of the connector end of the socket (2) is surrounded by several mating seats (9). The mating seats (9) are provided with positioning posts (10) that are opposite to the elastic latching members (8). The elastic latching members (8) and positioning posts (10) together form a ring-shaped locking and anti-disengagement mechanism on the outer wall of the connector end of the plug (1) and the socket (2).

2. The spring-loaded snap-on explosion-proof motor bolt anti-detachment device according to claim 1, characterized in that: There are four of each of the buckle seat (7) and the docking seat (9), and the positions of the buckle seat (7) and the docking seat (9) correspond one to one.

3. The spring-loaded snap-on explosion-proof motor bolt anti-detachment device according to claim 1, characterized in that: The lower end of the buckle seat (7) is provided with a tension block (13), and the inner end of the elastic buckle (8) is connected to the bottom of the tension block (13) through a pivot pin. The upper end of the buckle seat (7) is provided with a fixing block (11), and the fixing block (11) and the tension block (13) are connected by a tension spring (12).

4. The spring-loaded snap-on explosion-proof motor bolt anti-detachment device according to claim 1, characterized in that: The elastic buckle (8) has a U-shaped structure and its outer end has a bent structure. The positioning post (10) is distributed at an angle on the docking seat (9). The bottom of the positioning post (10) is also provided with an arc-shaped bayonet that matches the outer end structure of the elastic buckle (8).

5. The spring-loaded snap-on explosion-proof motor bolt anti-detachment device according to claim 1, characterized in that: The two outer walls of the plug (3) are provided with arc-shaped openings, and the arc-shaped openings of the two outer walls of the plug (3) are provided with elastic telescopic members (5). The outer side of the elastic telescopic members (5) is fixed with snap-fit ​​arms (6), and the inner walls of the two sides of the plug hole (4) are provided with snap-fit ​​grooves that match the structure of the snap-fit ​​arms (6).

6. The spring-loaded snap-on explosion-proof motor bolt anti-detachment device according to claim 5, characterized in that: The snap-fit ​​arms (6) all extend to the outside of the arc-shaped opening on the outer wall of the plug post (3), and both the upper and lower ends of the snap-fit ​​arms (6) have an arc-shaped transition structure.

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