Anti-pull-off quick-connection type charging plug
By designing limiting and protective mechanisms, the electric vehicle charging plug is prevented from coming loose when the vehicle is tilted, and the cable connection is protected from aging, thus solving the safety hazards and wire aging problems existing in the prior art.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU ZHONGDE ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-15
AI Technical Summary
Existing electric vehicle charging plugs are prone to coming loose when the vehicle is tilted, and the wire connections are prone to aging, posing a safety hazard.
A quick-connect charging plug designed to prevent pull-out is employed, which uses a limiting mechanism and a protection mechanism. The limiting mechanism prevents the plug from coming loose through a transmission gear and a limiting bracket, while the protection mechanism prevents the cable from aging through a silicone sleeve and an internal spring.
It effectively prevents the plug from being pulled off when the vehicle is tilted, protects the cable connection from aging, and improves safety and service life.
Smart Images
Figure CN224249074U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging plug technology, specifically to an anti-pull-out quick-connect charging plug. Background Technology
[0002] An electric vehicle charger typically consists of an input terminal, a transformer, a rectifier circuit, a filter circuit, a voltage regulator circuit, and an output terminal. The input terminal connects to an AC power source. The transformer reduces the voltage to a suitable level. The rectifier circuit converts the AC power to DC power. The filter circuit smooths the DC power. The voltage regulator circuit ensures a stable output voltage. Finally, the output terminal connects to the electric vehicle battery via a universal T-type connector.
[0003] The existing Chinese utility model patent with publication number CN203150815U discloses an electric vehicle charger socket plug, which includes a battery car socket, a plug, and a charger socket. The plug is fixedly connected to the battery car socket, and the charger socket has a cavity with a spring plug fixed at one end and a magnet at the other end. The magnet and the spring plug are connected by a spring. The plug is connected to the battery of the electric vehicle through a wire, and the magnet is connected to the charger circuit through a wire. The advantages of this utility model are: simple structure, easy to manufacture; strong practicality, small size; utilizing the principle of magnetic attraction to improve the contact effect, making the electric vehicle charger easier to operate and less prone to shaking; and low manufacturing cost.
[0004] Existing electric vehicles are generally supported during charging using a support rod on one side of the vehicle or a support frame at the bottom. Both of these support methods have the potential to tip over. Since one end of the electric vehicle charger is plugged into the socket, when the electric vehicle tipes over, the position between the electric vehicle charger and the vehicle's charging interface will change. This can cause the plug to be pulled and slide against the charging port, affecting the contact between the internal electrodes and causing the charging connector to overheat, posing a certain safety hazard. In addition, due to the limited size of the electric vehicle, the connection between the charging plug and the power cord may remain bent for a long time during charging, which can cause the outer insulation layer of the power cord to age and affect its service life. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an anti-pull-out quick-connect charging plug, which solves problems such as the charging connector loosening under force and the protective layer at the connection with the wire aging easily.
[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an anti-pull-out quick-connect charging plug, including a plug, with a cable fixedly installed at the tail of the plug, characterized in that: a limiting mechanism is installed on the outside of the plug to limit the position between the plug and the interface, and a protective mechanism is installed at the tail of the plug to protect the connection part between the plug and the cable;
[0007] The limiting mechanism includes a metal sleeve fixed to the outside of the plug, a connecting shaft movably installed inside the metal sleeve, a limiting frame fixedly installed on the outside of the connecting shaft, and transmission gears fixedly installed at both ends of the connecting shaft. By rotating the limiting frame, the outer end of the limiting frame contacts the interface mounting surface, thereby increasing the area of the plug support base and preventing the plug from being pulled off.
[0008] The protection mechanism includes a stress relief tail fixed to the rear end of the plug. A silicone sleeve is fixedly installed at the rear end of the stress relief tail. An internal spring is fixedly installed inside the silicone sleeve. The stress relief tail and the internal spring inside the silicone sleeve increase the curvature when the plug is bent at the connection with the cable.
[0009] Preferably, a copper terminal is fixedly installed inside the front end of the plug, a rack is movably installed inside the metal sleeve, a transmission frame is fixedly installed at the front end of the rack, sliding shafts are inserted and installed at the four corners of the metal sleeve, and return springs are inserted and installed on the outer side of the sliding shafts.
[0010] Preferably, the metal sleeve is fixedly connected to the plug, and the connecting shaft is rotatably connected to the metal sleeve.
[0011] Preferably, the rack and the metal sleeve form a sliding connection, the rack and the transmission gear mesh with each other, the sliding shaft and the metal sleeve form a sliding connection, and the diameter of the first half of the cylindrical opening at the connection between the metal sleeve and the sliding shaft is larger than the outer diameter of the sliding shaft.
[0012] Preferably, a limiting ring is fitted on the outer side of the stress relief tail, and limiting screws are movably installed on the upper and lower sides of the limiting ring. A transmission plate is fitted inside the stress relief tail, and a rubber clamp is fixedly installed at the bottom of the transmission plate.
[0013] Preferably, the stress relief tail has equidistant grooves on its left and right sides, and the stress relief tail and the silicone sleeve are located on the outside of the cable.
[0014] Preferably, the limiting screw is movably connected to the limiting ring via a threaded structure, the transmission plate and the rubber clamp are mirror-symmetrically installed inside the stress relief tail, the transmission plate, the rubber clamp and the stress relief tail are slidably connected, and the inner wall of the rubber clamp is provided with a protruding structure.
[0015] Beneficial effects
[0016] This invention provides an anti-pull-out quick-connect charging plug. Compared with the prior art, it has the following advantages:
[0017] (1) The anti-pull-out quick-connect charging plug, through the setting of the limiting frame, because the transmission gears at both ends of the connecting shaft mesh with the rack, and the movement direction of the transmission frame is limited by the sliding shaft, when the plug is inserted, the transmission frame will drive the rack to move backward, and the transmission gear will drive the limiting frame to rotate through the connecting shaft, so that the outer end of the limiting frame moves to the front side. When the plug is fully inserted into the interface, the rear side of the transmission frame is fully attached to the front end of the metal sleeve, the limiting frame is fully unfolded, and the front end contacts the mounting surface of the interface. A triangular structure is formed between the limiting frame and the plug and socket mounting surface. When the vehicle tilts and a lateral pulling force occurs, the limiting frame will limit the angle of the plug to prevent the plug from being pulled out of the socket when the vehicle tilts.
[0018] (2) The anti-pull-out quick-connect charging plug, through the setting of the silicone sleeve, the stress relief tail and the silicone sleeve are located on the outside of the cable. The stress relief tail can protect the cable. Since the silicone material has a certain deformation capability, the inner spring of the silicone sleeve can bend within a certain range. When the cable needs to be bent, the inner spring of the silicone sleeve can limit the bending arc of the cable, avoid the cable from being folded and stretching the outer insulation layer, thereby preventing the outer insulation layer of the cable from aging due to maintaining a small angle bending state for a long time. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the connection structure between the metal sleeve and the transmission frame of this utility model;
[0021] Figure 3 This is a schematic diagram of the connection structure between the stress relief tail and the plug of this utility model;
[0022] Figure 4 This is a schematic diagram of the connection structure between the limiting ring and the limiting screw of this utility model;
[0023] In the diagram: 1. Plug; 11. Cable; 12. Copper terminal; 2. Limiting mechanism; 21. Metal sleeve; 22. Connecting shaft; 23. Limiting frame; 24. Transmission gear; 25. Rack; 26. Transmission frame; 27. Sliding shaft; 28. Return spring; 3. Protection mechanism; 31. Stress relief tail; 32. Silicone sleeve; 33. Limiting ring; 34. Limiting screw; 35. Transmission plate; 36. Rubber clamp; 37. Inner spring. Detailed Implementation
[0024] 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.
[0025] Please see Figure 1-4 This utility model provides a technical solution: an anti-pull-out quick-connect charging plug, including a plug 1, a cable 11 fixedly installed at the tail of the plug 1, a copper terminal 12 fixedly installed inside the front end of the plug 1, a limiting mechanism 2 installed on the outside of the plug 1 to limit the position between the plug 1 and the interface, and a protective mechanism 3 installed at the tail of the plug 1 to protect the connection part between the plug 1 and the cable 11.
[0026] The limiting mechanism 2 includes a metal sleeve 21 fixed to the outside of the plug 1. A connecting shaft 22 is movably installed inside the metal sleeve 21. A limiting frame 23 is fixedly installed on the outside of the connecting shaft 22. Transmission gears 24 are fixedly installed at both ends of the connecting shaft 22. By rotating the limiting frame 23, the outer end of the limiting frame 23 contacts the interface mounting surface, thereby increasing the area of the support base of the plug 1 and preventing the plug 1 from being pulled out.
[0027] A rack 25 is movably installed inside the metal sleeve 21. A transmission frame 26 is fixedly installed at the front end of the rack 25. Sliding shafts 27 are inserted through the four corners of the metal sleeve 21. Return springs 28 are inserted through the outer side of the sliding shafts 27. The metal sleeve 21 is fixedly connected to the plug 1. The connecting shaft 22 is rotatably connected to the metal sleeve 21. The rack 25 is slidably connected to the metal sleeve 21. The rack 25 meshes with the transmission gear 24. The sliding shaft 27 is slidably connected to the metal sleeve 21. The diameter of the first half of the cylindrical opening at the connection between the metal sleeve 21 and the sliding shaft 27 is larger than the outer diameter of the sliding shaft 27.
[0028] Specifically, the position of the connecting shaft 22 is restricted by the metal sleeve 21, so that the limiting frame 23 can connect with the metal sleeve 21 while the connecting shaft 22 rotates. Since the transmission gears 24 at both ends of the connecting shaft 22 mesh with the rack 25, and the movement direction of the transmission frame 26 is restricted by the sliding shaft 27, when the plug 1 is inserted, the transmission frame 26 will drive the rack 25 to move backward, so that the transmission gears 24 drive the limiting frame 23 to rotate through the connecting shaft 22, so that the outer end of the limiting frame 23 moves to the front side. When the plug 1 is fully inserted into the interface, the rear side of the transmission frame 26 is fully in contact with the front end of the metal sleeve 21, the limiting frame 23 is fully extended, and the front end contacts the mounting surface of the interface. The limiting frame 23, the plug 1, and the mounting surface of the socket form a triangular structure. When the vehicle tilts and a lateral pulling force occurs, the limiting frame 23 will restrict the angle of the plug 1 to prevent the plug 1 from being pulled out of the socket when the vehicle tilts. When the plug 1 is pulled out, the return spring 28 will drive the rack 25 to return to its original position through the transmission frame 26.
[0029] The protection mechanism 3 includes a stress relief tail 31 fixed to the rear end of the plug 1. A silicone sleeve 32 is fixedly installed at the rear end of the stress relief tail 31. An internal spring 37 is fixedly installed inside the silicone sleeve 32. The stress relief tail 31 and the internal spring 37 inside the silicone sleeve 32 increase the curvature when the plug 1 is bent at the connection with the cable 11. A limit ring 33 is fitted on the outside of the stress relief tail 31. Limit screws 34 are movably installed on the upper and lower sides of the limit ring 33. A transmission mechanism is fitted inside the stress relief tail 31. The bottom of the moving plate 35 and the transmission plate 35 is fixedly installed with a rubber clamp 36. The stress relief tail 31 has equidistant grooves on its left and right sides. The stress relief tail 31 and the silicone sleeve 32 are located on the outside of the cable 11. The limiting screw 34 is connected to the limiting ring 33 through a threaded structure. The transmission plate 35 and the rubber clamp 36 are installed symmetrically inside the stress relief tail 31. The transmission plate 35, the rubber clamp 36 and the stress relief tail 31 are connected in a sliding manner. The inner wall of the rubber clamp 36 is provided with a protruding structure.
[0030] Specifically, the stress relief tail 31 can protect the cable 11. Since the silicone material has a certain deformation capability, the inner spring 37 inside the silicone sleeve 32 can bend within a certain range. When the cable 11 needs to be bent, the inner spring 37 inside the silicone sleeve 32 can limit the bending arc of the cable 11, preventing the cable 11 from being folded and stretching the outer insulation layer. The limiting ring 33 is fitted into the outside of the stress relief tail 31 to limit the position between the limiting screw 34 and the stress relief tail 31. The limiting screw 34 limits the distance between the transmission plates 35, causing the protruding structure inside the rubber clamp 36 to deform, increasing the friction between it and the cable 11, and clamping the part of the cable 11 located inside the stress relief tail 31 to prevent the cable 11 from coming loose when the vehicle is tilted. At the same time, the contents not described in detail in this specification are all prior art known to those skilled in the art.
[0031] During operation, because the transmission gears 24 at both ends of the connecting shaft 22 mesh with the rack 25, and the movement direction of the transmission frame 26 is restricted by the sliding shaft 27, when the plug 1 is inserted, the transmission frame 26 will drive the rack 25 to move backward, thereby causing the transmission gears 24 to drive the limiting frame 23 to rotate through the connecting shaft 22, so that the outer end of the limiting frame 23 moves to the front. When the plug 1 is fully inserted into the interface, the rear side of the transmission frame 26 is completely in contact with the front end of the metal sleeve 21, the limiting frame 23 is fully extended, and the front end contacts the mounting surface of the interface. A triangular structure is formed between the limiting frame 23, the plug 1, and the mounting surface of the socket. When the vehicle tilts and a lateral pulling force occurs, the limiting frame 23 will... The angle of plug 1 is limited to prevent plug 1 from being pulled out of the socket when the vehicle is tilted. With the setting of silicone sleeve 32, stress relief tail 31 and silicone sleeve 32 are located on the outside of cable 11. Stress relief tail 31 can protect cable 11. Since silicone material has a certain deformation capacity, the inner spring 37 inside silicone sleeve 32 can bend within a certain range. When cable 11 needs to be bent, the inner spring 37 inside silicone sleeve 32 can limit the bending arc of cable 11, avoiding the situation where cable 11 is folded and stretches the outer insulation layer, thereby preventing the outer insulation layer of cable 11 from aging due to being kept in a small-angle bending state for a long time.
[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pull-out quick-connect charging plug, comprising a plug (1), wherein a cable (11) is fixedly installed at the tail of the plug (1), characterized in that: A limiting mechanism (2) is installed on the outside of the plug (1) to limit the position between the plug (1) and the interface. A protective mechanism (3) is installed at the tail of the plug (1) to protect the connection between the plug (1) and the cable (11). The limiting mechanism (2) includes a metal sleeve (21) fixed to the outside of the plug (1). A connecting shaft (22) is movably installed inside the metal sleeve (21). A limiting frame (23) is fixedly installed on the outside of the connecting shaft (22). Transmission gears (24) are fixedly installed at both ends of the connecting shaft (22). By rotating the limiting frame (23), the outer end of the limiting frame (23) contacts the interface mounting surface, thereby increasing the area of the supporting base of the plug (1) and preventing the plug (1) from being pulled out. The protection mechanism (3) includes a stress relief tail (31) fixed to the rear end of the plug (1). A silicone sleeve (32) is fixedly installed at the rear end of the stress relief tail (31). An internal spring (37) is fixedly installed inside the silicone sleeve (32). The stress relief tail (31) and the internal spring (37) inside the silicone sleeve (32) increase the curvature when the plug (1) is bent at the connection with the cable (11).
2. The anti-pull-out quick-connect charging plug according to claim 1, characterized in that: A copper terminal (12) is fixedly installed inside the front end of the plug (1), a rack (25) is movably installed inside the metal sleeve (21), a transmission frame (26) is fixedly installed at the front end of the rack (25), a sliding shaft (27) is inserted through the four corners of the metal sleeve (21), and a return spring (28) is inserted through the outside of the sliding shaft (27).
3. The anti-pull-out quick-connect charging plug according to claim 1, characterized in that: The metal sleeve (21) is fixedly connected to the plug (1), and the connecting shaft (22) is rotatably connected to the metal sleeve (21).
4. The anti-pull-out quick-connect charging plug according to claim 2, characterized in that: The rack (25) and the metal sleeve (21) form a sliding connection. The rack (25) meshes with the transmission gear (24). The sliding shaft (27) and the metal sleeve (21) form a sliding connection. The diameter of the first half of the cylindrical opening at the connection between the metal sleeve (21) and the sliding shaft (27) is larger than the outer diameter of the sliding shaft (27).
5. A quick-connect charging plug with anti-pull-out feature according to claim 2, characterized in that: A limiting ring (33) is fitted on the outer side of the stress relief tail (31), and limiting screws (34) are movably installed on the upper and lower sides of the limiting ring (33). A transmission plate (35) is fitted inside the stress relief tail (31), and a rubber clip (36) is fixedly installed at the bottom of the transmission plate (35).
6. The anti-pull-out quick-connect charging plug according to claim 1, characterized in that: The stress relief tail (31) has equidistant grooves on its left and right sides, and the stress relief tail (31) and the silicone sleeve (32) are located on the outside of the cable (11).
7. A quick-connect charging plug with anti-pull-out feature according to claim 5, characterized in that: The limiting screw (34) is connected to the limiting ring (33) through a threaded structure. The transmission plate (35) and the rubber clamp (36) are installed symmetrically inside the stress relief tail (31) in a mirror image. The transmission plate (35), the rubber clamp (36) and the stress relief tail (31) are connected in a sliding manner. The inner wall of the rubber clamp (36) is provided with a protruding structure.