DC plug wire harness with stable connection looseness prevention

Abstract

The invention relates to the technical field of plug wire harnesses, in particular to a DC plug wire harness with stable connection looseness prevention, which comprises a bayonet socket and a wire, a socket core is mounted in the bayonet socket, and one end, far away from the bayonet socket, of the wire is fixedly connected with an annular wiring terminal through a thermal shrinkable sleeve. And a plugging locking mechanism is arranged at one end, close to the plugging seat, of the electric wire. Through the arrangement of the plugging locking mechanism, the blocking external member is integrated in the socket door slot arranged at the plugging port of the plugging seat, and the optimized structural design not only can meet the sealing performance and the dustproof performance when the plugging seat is plugged with the wiring harness structure, but also can ensure the stable anti-falling performance of the wire after plugging, and the wire is tightly connected with the plugging seat, so that the wiring harness structure is prevented from falling off. According to the utility model, the electric wire is prevented from loosening or falling off due to external force in the use process, and through the optimized design of the installation mechanism of the blocking sleeve, the blocking sleeve and the bayonet socket are installed in a matched manner, the bayonet socket is assisted in heat dissipation, and the influence of internal heat accumulation on the circuit performance is avoided.

Description

Technical Field

[0001] This invention relates to the field of plug-in harness technology, specifically to a DC plug-in harness with stable and secure connection. Background Technology

[0002] DC power harnesses are wiring systems used in electric vehicles to transmit DC power. They are key components connecting high-voltage parts such as the power battery, high-voltage control box, DC / DC converter, and motor controller. They transmit the high-voltage DC power from the power battery to these high-voltage components to meet the needs of vehicle driving and charging. Some harnesses also carry control signals to enable coordinated operation between components. Through the design of insulation materials and shielding layers, the safety and reliability of power transmission are ensured. To ensure safe and reliable power transmission, the quality of DC power harnesses in electric vehicles is subject to extremely high requirements. Otherwise, if the harness is damaged and leakage occurs, it will cause a series of serious consequences.

[0003] In existing technologies, such as the DC power connector disclosed in CN221328253U, a fixing sleeve limits the connector plug through a sleeve plate, and then an elastic band and an arc-shaped retaining plate fix the connector plug in position through the sleeve plate, achieving the advantage of not easily falling off. The connector of the DC power connector is not easily dislodged due to accidental contact, making it convenient for users. However, in actual use, the fixing method is to achieve the fixing effect by the snap-fit ​​between the components on the plug and the mating parts on the plugging device. This requires the installation of multiple mating parts on the plugging device, which is time-consuming and labor-intensive. In addition, the traditional wire harness structure is simple and cannot integrate a dustproof and sealing structure to ensure the protection performance of the circuit. Furthermore, under frequent plugging and unplugging or vibration environments, the DC plug harness is prone to loosening, thereby affecting the protection performance of the circuit.

[0004] Therefore, this invention proposes a DC plug-in harness with stable connection to prevent loosening, in order to solve the problems of existing DC plug-in harnesses having a simple structure, being unable to integrate a dustproof and sealing structure, and being prone to loosening under frequent plugging and unplugging or vibration environments, thereby affecting the protection performance of the circuit. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a DC plug-in harness with stable and secure connection to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a DC plug-in harness with a secure and non-loose connection, comprising a plug-in socket and a wire. A socket core is installed inside the plug-in socket. One end of the wire away from the plug-in socket is fixedly connected to a ring-shaped terminal block via a heat-shrink sleeve. A plug-in locking mechanism is provided at the end of the wire near the plug-in socket. A socket door groove is provided at the plug-in end of the plug-in socket. A blocking kit is movably installed inside the socket door groove. A threaded hole is provided through the center of the socket door groove. A blocking kit mounting mechanism is threadedly connected to the inner side of the threaded hole. The blocking kit mounting mechanism includes a locking bolt.

[0007] Preferably, a plug-in end is fixedly installed at one end of the wire away from the ring terminal, and a plug-in core is fixedly installed at the other end of the plug-in end. A core rod is provided on the inner side of the plug-in core, and the core rod is electrically connected to the socket core in the plugged-in state.

[0008] Preferably, the insertion locking mechanism further includes a pusher and a locking member. The pusher includes a protrusion fixedly installed on the outer ring surface of the flange head. A locking hole is provided on the inner wall of the protrusion. Force-bearing plates are fixedly installed on both sides of the protrusion. A reserved groove is provided on the upper inner wall of the force-bearing plate.

[0009] Preferably, a sliding groove is formed through one side of the inner wall of the lock hole, and an actuating element is provided on the inner side of the sliding groove. The actuating element includes a push rod that is slidably installed on the inner side of the sliding groove. The push rod is composed of a rod body and a contact and is integrally formed. A spring is slidably sleeved on the outer surface of the rod body. One end of the spring is fixedly connected to the inner wall of the protrusion, and the other end of the spring is fixedly connected to the outer surface of the contact.

[0010] Preferably, the barrier kit consists of an annular portion, a connecting portion, and an insert portion. Two sets of the annular portions and one set of connecting portions are integrally formed and movably inserted into the inner surface of the socket door groove. The insert portion is fixedly installed on the outer edge of the annular portion and the connecting portion. A sealing ring is fixedly installed on the inner side of the insert portion. The outer surface of the sealing ring is movably inserted into the inner wall of one end of the plug socket.

[0011] Preferably, the locking element is disposed on the inner wall of the annular portion. The locking element includes a mounting groove plate fixedly fastened to the inner ring side wall of the annular portion. A protruding plate is fixedly mounted on the inner side of the mounting groove plate. A swing locking rod is rotatably mounted on the inner side of the protruding plate. An elastic contact rod is fixedly connected to the outer surface of one end of the swing locking rod. The other end of the elastic contact rod is fixedly connected to the inner surface of the mounting groove plate. A hook plate is provided at the end of the swing locking rod away from the elastic contact rod. The outer surface of the hook plate is movably engaged with the inner surface of the lock hole, and the outer surface of the lock hole is movably in contact with the outer surface of one end of the push rod.

[0012] Preferably, the locking bolt consists of a threaded rod and a threaded head, wherein the outer surface of the threaded rod penetrates the inner wall of the center of the connecting part and is threadedly connected thereto.

[0013] Preferably, a central groove is formed on the inner wall of the locking bolt, and an Archimedes spiral is provided on the inner surface of the central groove.

[0014] Preferably, the inner wall of the central groove is provided with uniformly distributed circular through holes, which are interconnected with the inner wall of the central groove.

[0015] Preferably, a diffusion hole is provided on the inner wall of the center of the connector, the output end of the diffusion hole corresponds to the circular through hole, and a heat-conducting plate is embedded in the inner side of the diffusion hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention proposes a DC plug-in harness with stable and secure connection. Through a plug-in locking mechanism, a barrier kit is integrated into the socket door groove at the plug-in port. Its optimized structural design not only satisfies the sealing and dustproof performance when the plug-in and harness are plugged in, but also ensures the stability and prevents the wire from detaching after plugging. It tightly connects the wire to the plug-in, preventing the wire from loosening or falling off due to external forces during use. Furthermore, through the optimized design of the barrier kit installation mechanism, while matching the barrier kit to the plug-in, it also assists in heat dissipation of the plug-in, preventing internal heat buildup from affecting circuit performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure between the connector and the wire of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure at point aa; Figure 3 For the present invention Figure 1 A schematic diagram of the cross-sectional structure at point bb; Figure 4 For the present invention Figure 2 A magnified structural diagram at point A; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A1; Figure 6 For the present invention Figure 3 A magnified structural diagram at point B; Figure 7 For the present invention Figure 6 Enlarged structural diagram at B1; Figure 8 This is a schematic diagram showing the disassembled structure of the socket core and the wire of the present invention; Figure 9 This is a schematic diagram of the connection structure between the socket core and the wire of the present invention; Figure 10 This is a schematic diagram of the installation structure of the connector and barrier kit of the present invention; Figure 11 This is a schematic diagram of the disassembled structure of the connector and barrier kit of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram at point C; Figure 13 For the present invention Figure 11 A magnified structural diagram at point D; Figure 14 For the present invention Figure 10 A magnified structural diagram of the cc section.

[0018] In the diagram: 1. Socket; 10. Socket door groove; 100. Diffuser hole; 11. Socket core; 110. Alignment hole; 2. Wire; 21. Flange head; 211. Protrusion; 2110. Lock hole; 212. Force-bearing plate; 2120. Reserved groove; 213. Mounting groove plate; 214. Elastic contact rod; 215. Swing locking rod; 21100. Slide groove; 21101. Push rod; 21102. Spring; 22. Socket end; 221. Electromagnetic wedge rod; 222. Electromagnetic wedge block; 23. Socket core cylinder; 3. Ring terminal; 4. Barrier kit; 41. Ring part; 42. Connecting part; 43. Embedding part; 5. Locking bolt; 50. Center groove; 501. Circular through hole; 51. Archimedes' spiral. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figure 1-14This invention provides a technical solution: a DC plug-in harness with a secure and non-loose connection, comprising a plug-in socket 1 and a wire 2. A socket core 11 is installed inside the plug-in socket 1. One end of the wire 2 away from the plug-in socket 1 is fixedly connected to a ring-shaped terminal block 3 via a heat-shrink sleeve. A plug-in locking mechanism is provided at the end of the wire 2 near the plug-in socket 1. A plug-in end 22 is fixedly installed at the end of the wire 2 away from the ring-shaped terminal block 3. A plug-in core cylinder 23 is fixedly installed at the other end of the plug-in end 22. A core rod is provided inside the plug-in core cylinder 23, and the core rod is electrically connected to the socket core 11 in the plugged-in state. A socket is provided at the plug-in end of the plug-in socket 1. The socket door slot 10 has a barrier kit 4 movably installed on its inner side. The barrier kit 4 consists of an annular part 41, a connecting part 42, and a fitting part 43. The two annular parts 41 and the connecting part 42 are integrally formed and movably fitted into the inner surface of the socket door slot 10. The fitting part 43 is fixedly installed on the outer edge of the annular part 41 and the connecting part 42. A sealing ring is fixedly installed on the inner side of the fitting part 43. The outer surface of the sealing ring is movably fitted into the inner wall of one end of the plug seat 1. A threaded hole is opened through the center of the socket door slot 10. The inner side of the threaded hole is threadedly connected to the barrier kit installation mechanism. The barrier kit installation mechanism includes a locking bolt 5. In this embodiment, the connector 1 is made of a high-strength nylon shell with a temperature range of -55℃ to 125℃. At the same time, the connector 1 integrates a barrier kit 4, with a protection level of IP67, to prevent dust and liquid intrusion, improve the temperature range and insulation performance of the wire harness, and avoid the risk of high voltage leakage. The ring terminal 3 is made of copper (purity ≥99.9%) with a tin-plated surface (thickness ≥8μm). It is connected to the wire 2 through a heat-shrink sleeve process to ensure a pull-out force ≥360N. It should be noted that the barrier kit 4 is integrally formed by the annular part 41, the connecting part 42 and the inserting part 43 and is fitted and snapped into the socket door groove 10 port to seal the plug port of the plug socket 1 and prevent external dust from entering. Furthermore, the sealing effect is further improved by the inner sealing ring of the inserting part 43 combined with the inner wall of the plug socket 1.

[0021] Example 2, see attached document Figure 1-14 Based on Embodiment 1, in order to achieve stability and prevent accidental contact between the plug core 23 and the socket core 11, and to avoid reverse connection of positive and negative poles: Electromagnetic wedges 221 are fixedly connected to the outer surfaces of both sides of the plug-in end 22. The outer surface of the electromagnetic wedges 221 is movably inserted into the inner wall of the alignment hole 110 opened on the inner wall of the socket core 11. An electromagnetic wedge block 222 is fixedly installed on the inner end wall of the alignment hole 110. The outer surface of the electromagnetic wedge block 222 is adapted to fit and embedded with the outer surface of the end of the electromagnetic wedge 221 away from the plug-in end 22. The electromagnetic wedges 221 and the electromagnetic wedge block 222 are two opposite magnetic poles and are electrically connected when energized. The electromagnetic wedge 222 and the electromagnetic wedge 221 are matched by the built-in electromagnetic wedge block 222. The two are magnetic poles that attract each other. When the power is on, the electromagnetic wedge 221 is inserted into the alignment hole 110 for initial positioning. When fully inserted, the wedge surfaces of the electromagnetic wedge block 222 and the electromagnetic wedge 221 match, avoiding reverse connection of positive and negative poles, and ensuring stable positioning and insertion between the insertion core 23 and the socket core 11.

[0022] Example 3, refer to Appendix Figure 1-14 Based on Embodiment 2, in order to achieve anti-disengagement locking when the DC plug harness is connected to plug socket 1: The insertion locking mechanism also includes a pushing component and a locking component. The pushing component includes a protrusion 211 fixedly installed on the outer annular surface of the flange head 21. A locking hole 2110 is provided on the inner wall of the protrusion 211. Force-bearing plates 212 are fixedly installed on both sides of the protrusion 211. A reserved groove 2120 is provided on the upper inner wall of the force-bearing plate 212. A sliding groove 21100 is provided through the inner wall of one side of the locking hole 2110. An actuating component is provided on the inner side of the sliding groove 21100. The actuating component includes a push rod 21101 slidably installed on the inner side of the sliding groove 21100. The push rod 21101 is composed of a rod body and a contact and is integrally formed. A spring 21102 is slidably sleeved on the outer surface of the rod body. One end of the spring 21102 is fixedly connected to the inner wall of the protrusion 211. The other end of the spring 21102 is fixedly connected to the outer surface of the contact; the locking member is provided on the inner wall of the annular part 41, and the locking member includes a mounting groove plate 213 fixedly clamped on the inner ring side wall of the annular part 41. A protruding plate is fixedly installed on the inner side of the mounting groove plate 213, and a swing locking rod 215 is rotatably installed on the inner side of the protruding plate. An elastic contact rod 214 is fixedly connected to the outer surface of one end of the swing locking rod 215. The other end of the elastic contact rod 214 is fixedly connected to the inner surface of the mounting groove plate 213. A hook plate is provided at the end of the swing locking rod 215 away from the elastic contact rod 214. The outer surface of the hook plate is movably engaged with the inner surface of the lock hole 2110, and the outer surface of the lock hole 2110 is movably in contact with the outer surface of one end of the push rod 21101. refer to Figures 4-7As shown, when connecting the DC connector harness to the connector 1, ensure the positive and negative terminals are connected in the correct orientation. Hold the cable 2 away from the flange head 21 at the end of the ring terminal 3, and insert the connector core 23 through the central groove of the connecting part 42. At this time, the electromagnetic wedges 221 on both sides of the connector core 23 enter the alignment holes 110, and the wedge surfaces of the electromagnetic wedges 221 and electromagnetic wedge blocks 222 match. When the flange head 21 is inserted inward, the inner side of the flange head 21 relative to the sides away from the electromagnetic wedges 221 abuts against the inner side of one end of the swing locking rod 215. At this time, the elastic contact rod 214 is compressed and deformed by the external abutment force. Under the lever working principle, the hook plate at the end of the swing locking rod 215 away from the elastic contact rod 214 is engaged in the locking hole 2110, thus achieving self-locking of the flange head 21. Please refer to [reference needed]. Figure 7 As shown, the wire harness is fully inserted and locked at this time. When it is necessary to unlock the action, the operator holds the flange head 21, places two fingers on the force-bearing plate 212, and presses inward at the same time. At this time, the force-bearing plate 212 undergoes slight elastic deformation under the action of external force. The force-bearing plate 212 abuts against the contact part of the inner push rod 21101. The push rod 21101 slides inward under the action of the abutting force, and the spring 21102 is compressed at this time. When the push rod 21101 slides inward, the rounded end away from the contact abuts against the hook plate, so that it is released from the restriction of the lock hole 2110. Then, the entire wire harness is pulled outward, thus realizing the quick disassembly of the wire harness.

[0023] Example 4, see attached document Figure 1-14 Based on Embodiment 3, in order to achieve a tight fit between the barrier kit 4 and the connector 1 while also aiding in the dissipation of heat inside the connector 1: The locking bolt 5 consists of a threaded rod and a threaded head. The outer surface of the threaded rod penetrates the inner wall of the connecting part 42 and is threaded to it. A central groove 50 is provided on the inner wall of the locking bolt 5, and an Archimedes spiral 51 is provided on the inner surface of the central groove 50. Circular through holes 501 are evenly provided on the inner wall of the central groove 50, and the circular through holes 501 communicate with the inner wall of the central groove 50. A diffuser hole 100 is provided on the inner wall of the plug-in seat 1. The output ends of the diffuser hole 100 correspond to the circular through holes 501, and a heat-conducting plate is embedded in the inner side of the diffuser hole 100. In this embodiment, by optimizing the overall structure of the locking bolt 5, it can serve as a fastener for the installation of the barrier kit 4 and the plug socket 1. Furthermore, by having the circular through hole 501 corresponding to the diffuser hole 100, it can help dissipate the heat generated when the socket core 11 is plugged into the wire harness. Moreover, by utilizing the spiral interlacing design of the Archimedes spiral plate 51 inside the central groove 50, air can be discharged while preventing air circulation, and dust and humidity from the external air holes can be absorbed, further playing a role in dustproofing and waterproofing.

[0024] The working principle and usage process of this invention are as follows: In actual use, firstly, one end of the wire 2 is tightly connected to the ring terminal 3 using a heat-shrink sleeve process, and the end away from the ring terminal 3 is connected to the electromagnetic wedge 222 and the plug core 23 through the flange head 21; then, the entire barrier kit 4 is stably connected to the plug socket 1 by the locking bolt 5, sealing the plug port of the plug socket 1 to prevent the entry of external dust; after installation, confirm that the positive and negative poles are connected in the correct direction, hold the flange head 21 at the end of the wire 2 away from the ring terminal 3, and insert the plug core 23 into the central groove of the connecting part 42. At this time, the electromagnetic wedges 221 on both sides of the plug core 23 enter the alignment hole 110, and the wedge surfaces of the electromagnetic wedges 221 match the electromagnetic wedges 222. When the flange head 21 is inserted inward, the flange head 21 is positioned relative to the inner side of the protrusions 211 on both sides away from the electromagnetic wedges 221. The inner side of one end of the swing locking rod 215 is pressed against the elastic contact rod 214, which is compressed by the external force. Under the lever principle, the hook plate at the end of the swing locking rod 215 away from the elastic contact rod 214 is engaged in the lock hole 2110, thus achieving self-locking of the flange head 21. When it is necessary to unlock the action, the operator holds the flange head 21, places two fingers on the force-bearing plate 212, and presses inward at the same time. At this time, the force-bearing plate 212 undergoes slight elastic deformation under the action of external force. The force-bearing plate 212 presses against the contact part of the inner push rod 21101. The push rod 21101 slides inward under the action of the force, and the spring 21102 is compressed. When the push rod 21101 slides inward, the rounded end away from the contact touches the hook plate, causing it to break free from the restriction of the lock hole 2110. Then, the entire wire harness is pulled outward, thus achieving rapid disassembly of the wire harness.

[0025] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A DC plug-in harness with anti-loosening and stable connection, comprising a plug-in socket (1) and a wire (2), wherein a socket core (11) is installed inside the plug-in socket (1), and one end of the wire (2) away from the plug-in socket (1) is fixedly connected to a ring terminal (3) by a heat shrink sleeve, characterized in that: The wire (2) is provided with a plug-in locking mechanism at one end near the plug-in socket (1). A socket door groove (10) is provided at the plug-in end of the plug-in socket (1). A blocking kit (4) is movably installed on the inner side of the socket door groove (10). A threaded hole is provided through the center of the socket door groove (10). A blocking kit installation mechanism is threadedly connected to the inner side of the threaded hole. The blocking kit installation structure includes a locking bolt (5).

2. The DC plug-in harness with anti-loosening and stable connection according to claim 1, characterized in that: The end of the wire (2) away from the ring terminal (3) is fixedly installed with a plug end (22), and the other end of the plug end (22) is fixedly installed with a plug core (23). The inner side of the plug core (23) is provided with a core rod, and the core rod is electrically connected to the socket core (11) in the plugged state.

3. The DC connector harness with anti-loosening and stable connection according to claim 1, characterized in that: The insertion locking mechanism further includes a pusher and a locking component. The pusher includes a protrusion (211) fixedly installed on the outer ring surface of the flange head (21). A locking hole (2110) is provided on the inner wall of the protrusion (211). Force-bearing plates (212) are fixedly installed on both sides of the protrusion (211). A reserved groove (2120) is provided on the upper inner wall of the force-bearing plate (212).

4. The DC plug-in harness with anti-loosening and stable connection according to claim 3, characterized in that: A sliding groove (21100) is provided through the inner wall of one side of the lock hole (2110). An actuating element is provided on the inner side of the sliding groove (21100). The actuating element includes a push rod (21101) that is slidably installed on the inner side of the sliding groove (21100). The push rod (21101) is composed of a rod body and a contact and is integrally formed. A spring (21102) is slidably sleeved on the outer surface of the rod body. One end of the spring (21102) is fixedly connected to the inner wall of the protrusion (211), and the other end of the spring (21102) is fixedly connected to the outer surface of the contact.

5. A DC connector harness with anti-loosening and stable connection according to claim 1, characterized in that: The barrier kit (4) consists of an annular part (41), a connecting part (42) and a fitting part (43). The two sets of annular parts (41) and the connecting part (42) are integrally formed and are movably fitted into the inner surface of the socket door groove (10). The fitting part (43) is fixedly installed on the outer edge of the annular part (41) and the connecting part (42). A sealing ring is fixedly installed on the inner side of the fitting part (43). The outer surface of the sealing ring is movably fitted into the inner wall of one end of the plug-in seat (1).

6. A DC connector harness with anti-loosening and stable connection according to claim 5, characterized in that: The locking element is disposed on the inner wall of the annular portion (41). The locking element includes a mounting groove plate (213) fixedly mounted on the inner annular side wall of the annular portion (41). A protruding plate is fixedly mounted on the inner side of the mounting groove plate (213). A swing locking rod (215) is rotatably mounted on the inner side of the protruding plate. An elastic contact rod (214) is fixedly connected to the outer surface of one end of the swing locking rod (215). The other end of the elastic contact rod (214) is fixedly connected to the inner surface of the mounting groove plate (213). A hook plate is provided at the end of the swing locking rod (215) away from the elastic contact rod (214). The outer surface of the hook plate is movably engaged with the inner surface of the lock hole (2110). The outer surface of the lock hole (2110) is movably abutting against the outer surface of one end of the push rod (21101).

7. A DC connector harness with anti-loosening and stable connection according to claim 5, characterized in that: The locking bolt (5) consists of a threaded rod and a screw head. The outer surface of the threaded rod penetrates the inner wall of the center of the connecting part (42) and is threadedly connected to it.

8. A DC connector harness with anti-loosening and stable connection according to claim 7, characterized in that: The locking bolt (5) has a central groove (50) on its inner wall, and an Archimedes spiral plate (51) is provided on the inner surface of the central groove (50).

9. A DC connector harness with anti-loosening and stable connection according to claim 8, characterized in that: The inner wall of the central groove (50) is provided with a circular through hole (501) which is connected to the inner wall of the central groove (50).

10. A DC plug-in harness with anti-loosening and stable connection according to claim 9, characterized in that: A diffusion hole (100) is provided on the inner wall of the center of the plug-in (1). The output end of the diffusion hole (100) corresponds to the circular through hole (501) respectively, and a heat-conducting plate is embedded in the inner side of the diffusion hole (100).

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