Dustproof pin module for new energy charging and connector applying same
By designing a dustproof pin module, the problem of dust accumulation on the charging gun pins in harsh environments was solved, achieving self-sealing and high-efficiency charging performance of the pin module, extending its service life and improving safety.
Patent Information
- Application Number
- CN202521979455.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-15
AI Technical Summary
The charging gun's pins are exposed in harsh environments, causing dust and grit to accumulate inside the deep holes, affecting contact and leading to dangers such as abnormal charging or overheating and short circuits.
A dustproof pin module was designed, including a pin body, an insulating cap, a dustproof component, and a return spring. Through the cooperation of the slide and the positioning shoulder, the pin module achieves self-sealing, preventing dust and impurities from entering and ensuring good coupling between the pin and the socket.
It achieves self-sealing of the pin module, keeps it clean, ensures efficient charging performance, long service life, and high safety, and avoids problems such as poor contact and overheating short circuit.
Smart Images
Figure CN224683482U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connectors, and in particular to a dustproof pin module for new energy charging and a connector using the same. Background Technology
[0002] With the explosive growth of the new energy vehicle market, charging anxiety has become a major pain point in the industry. High-power fast charging technology effectively solves this problem. To improve current carrying capacity, the outer diameter of the charging gun's pins and the inner diameter of the charging socket's hole are correspondingly increased. To meet IPXXB anti-finger contact requirements, small pins are often used inside the socket as an anti-finger contact structure, and deep holes are reserved in the pins to accommodate the small pins. The problem is that when the charging gun is used in a harsh environment, there is no protective structure around or inside the pins. The deep holes of unused pins are exposed to the harsh environment, and dust, sand and other impurities can easily accumulate inside the deep holes, leading to poor contact and abnormal charging, or even dangers such as overheating or short circuits. Utility Model Content
[0003] To address one or more of the aforementioned problems, this utility model provides a dustproof pin module for new energy charging and a connector using the same.
[0004] According to one aspect of the present invention, the dustproof pin module for new energy charging includes: a pin body, an insulating cap, a dustproof component, and a reset spring.
[0005] A front insertion hole is provided at the center of one end face of the pin body;
[0006] The rear end of the insulating cap snaps into the front end of the front insertion hole, and the first through hole of the insulating cap connects to the front insertion hole to form a slide. An annular step is provided inside the first through hole.
[0007] The dustproof component includes a column that is slidably connected in the slide rail. The rear end of the column is integrally provided with a conical centering body and the front end is integrally provided with a positioning shoulder that cooperates with the step. The rear end of the centering body is provided with a core column.
[0008] The rear end of the reset spring is attached to the rear wall of the front insertion hole, and its front end is sleeved on the outside of the core post and attached to the outer wall of the centering body. During charging, the pin module is coupled to the insertion hole module. The anti-touch finger post of the insertion hole module pushes the dustproof part to move inward and compresses the reset spring. When charging is finished, the reset spring causes the post to slide to the first through hole and the positioning shoulder to fit tightly against the step, thereby sealing and protecting the front insertion hole.
[0009] In some embodiments, the front end of the first through hole is provided with a small-diameter circular port, and the step is integrally formed and connected between the port and the first through hole;
[0010] The front end of the column is equipped with a small-diameter end cap, and the positioning shoulder is integrally formed and connected between the end cap and the column. The port and the end cap, the step and the positioning shoulder are respectively connected by equal diameter through sleeves; the column and the slide are connected by a small gap through sleeve.
[0011] In some embodiments, the positioning shoulder is a frustum, the step is a frustum protrusion, and the inner wall of the step and the outer wall of the frustum are in close contact.
[0012] In some embodiments, the front end of the front insertion hole is provided with an annular first slot and an annular first locking head located outside the first slot, and the middle of the outer peripheral wall of the insulating cap is provided with an annular second slot and an annular second locking head located behind the second slot. The first locking head is interference-fitted into the second slot and the second locking head is interference-fitted into the first slot.
[0013] In some embodiments, several axial notches axially penetrate the second card head and extend to the middle position of the second card slot. The rear side of the second card head is also provided with an inner guide end with a chamfered structure, and the front end of the outer peripheral wall of the insulating cap is provided with an outer positioning end with a chamfered structure.
[0014] In some embodiments, the rear wall of the front insertion hole is provided with an end face annular groove and a central post, and the rear end gap sleeve of the reset spring is sleeved with the end face annular groove and the central post.
[0015] In some implementations, the dustproof component is made of nylon plastic; the pin body is made of copper; and the return spring is a cylindrical axial compression spring.
[0016] According to another aspect of this utility model, the connector includes: a charging gun and a charging socket that are mutually plugged into each other; the charging gun has a plurality of the aforementioned pin modules installed inside, and the charging socket has a plurality of socket modules installed inside.
[0017] The socket module includes a socket body and an anti-touch finger post. The mounting groove of the socket hole in the socket body is provided with a spring sleeve. The rear end of the anti-touch finger post is connected to the center of the rear wall of the socket hole and the front end is exposed in the socket hole. The front end of the pin body passes through the socket hole with the same diameter and is interference-fitted with the spring sleeve. The anti-touch finger post passes through the slide of the pin module.
[0018] In some implementations, an insulating head is integrally coated with rubber at the front end of the anti-touch finger post, with the insulating head protruding from the insertion hole and fitting with the slide rail with a clearance; a metal rivet is also riveted to the front end of the insertion hole body.
[0019] In some embodiments, the middle of the pin body is sealed to the charging gun housing by an O-ring; the middle of the socket body is sealed to the charging base housing by an O-ring.
[0020] This connector features a self-sealing pin module, which has the following advantages: the front end hole of the pin module remains clean for a long time as no dust, sand or other impurities can enter; the pin module and the socket module have good coupling contact; the charging performance is efficient; the service life is long; and the safety is high. Attached Figure Description
[0021] Figure 1 This is a three-dimensional schematic diagram of a dustproof pin module for new energy charging according to one embodiment of the present invention.
[0022] Figure 2 for Figure 1 A cross-sectional view of the pin module shown.
[0023] Figure 3 for Figure 1 A three-dimensional exploded view of the pin module shown;
[0024] Figure 4 for Figure 3 A three-dimensional schematic diagram of the dustproof component shown;
[0025] Figure 5 for Figure 3 A three-dimensional schematic diagram of the insulating cap shown;
[0026] Figure 6 This is a front view schematic diagram of the coupling connection between the pin module and the socket module of the connector according to an embodiment of the present invention.
[0027] Figure 7 for Figure 6 A cross-sectional view of the connector shown.
[0028] Pin module 01, pin body 1, front insertion hole 10, first slot 11, first clip 12, insulating cap 2, first through hole 20, step 21, port 22, second slot 23, second clip 24, notch 25, external positioning end 26, internal guide end 27, dustproof component 3, column 30, centering body 31, positioning shoulder 32, core column 33, end cap 34, return spring 4;
[0029] Socket module 02, anti-touch finger post 5, socket body 6, plug hole 60, spring sleeve 7, insulating head 8, rivet sleeve 9. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.
[0031] Figures 1 to 5 The diagram schematically illustrates a dustproof connector module for new energy charging according to one embodiment of the present invention. As shown, the dustproof connector module for new energy charging includes: a connector body 1, an insulating cap 2, a dustproof component 3, and a return spring 4;
[0032] The pin body 1 has a front insertion hole 10 at the center of one end face. The pin body 1 is preferably made of copper.
[0033] The rear end of the insulating cap 2 is snapped into the front end of the front insertion hole 10. The first through hole 20 of the insulating cap 2 connects to the front insertion hole 10 to form a slide. An annular step 21 is provided in the first through hole 20.
[0034] The dustproof component 3 includes a column 30 slidably connected within a slide rail. The column 30 has a conical centering body 31 integrally formed at its rear end and a positioning shoulder 32 integrally formed at its front end to mate with the step 21. A core column 33 is provided at the rear end of the centering body 31. The dustproof component 3 is preferably made of nylon plastic. Preferably, the positioning shoulder 32 is a frustum, and the step 21 is a frustum protrusion. The inner wall surface of the step 21 and the outer wall surface of the frustum have the same contour shape. This choice further improves the tightness of the fit, ensures the sealing performance of the front insertion hole 10, and prevents the dustproof component 3 from being pushed out of the pin body 1 by the return spring 4.
[0035] The rear end of the return spring 4 is attached to the rear wall of the front insertion hole 10, and its front end is sleeved on the outside of the core post 33 and attached to the outer wall of the centering body 31; the return spring 4 is preferably a cylindrical axial compression spring.
[0036] During charging, the pin module 01 is coupled to the socket module 02. The anti-touch finger post 5 of the socket module 02 pushes the dustproof part 3 to move inward and compresses the reset spring 4. When charging is finished, the reset spring 4 causes the post 30 to slide to the first through hole 20 and the positioning shoulder 32 to fit tightly against the step 21, thereby sealing and protecting the front socket 10.
[0037] This dustproof pin module for new energy charging has a dustproof component 3 inside. When the pin module 01 is not in use, the positioning shoulder 32 of the dustproof component 3 and the step 21 of the insulating cap 2 fit tightly together, thereby sealing the front insertion hole 10. Its beneficial effects are: First, the pin module 01 has a self-sealing protective component 3, which prevents the front hole 10 of the unused pin from being exposed to the environment, prevents dust, sand and other impurities from entering the front hole 10, ensures the cleanliness of the front hole 10, and achieves good coupling contact between the pin module 01 and the socket module 02. There is no charging abnormality caused by poor contact, the charging performance is efficient, the service life is long, and the safety is high. Second, the return spring 4 is used as a damping component and a reset component, which is convenient to operate. At the same time, the dustproof component 3 uses a conical centering body 31 to contact the return spring 4. The conical structure makes the force of the return spring 4 on the dustproof component 3 always point to the axis of the dustproof component 2. Therefore, the dustproof component 3 has good axial movement and ensures the accuracy of the fit and seal.
[0038] Furthermore, the front end of the first through hole 20 is provided with a small-diameter circular port 22, and a step 21 is integrally formed and connected between the port 22 and the first through hole 20; the front end of the column 30 is provided with a small-diameter end cap 34, and a positioning shoulder 32 is integrally formed and connected between the end cap 34 and the column 30. The port 22 and the end cap 34, and the step 21 and the positioning shoulder 32 are respectively connected by equal diameter sleeves; the column 30 and the slide are connected by a small gap sleeve. The beneficial effect is that this setting increases the sealing area, ensures the reliability of the connection, and achieves high sealing performance of the front insertion hole 10.
[0039] Furthermore, the front insertion hole 10 has an annular first groove 11 at its front end and an annular first locking head 12 located outside the first groove 11. The insulating cap 2 has an annular second groove 23 in the middle of its outer peripheral wall and an annular second locking head 24 located behind the second groove 23. The first locking head 12 is interference-fitted into the second groove 23, and the second locking head 24 is interference-fitted into the first groove 11. The beneficial effect is that this arrangement ensures a tight fixation and precise connection between the insulating cap 2 and the pin body 1.
[0040] Preferably, several axial notches 25 axially penetrate the second locking head 24 and extend to the middle position of the second locking groove 23. The rear side of the second locking head 24 is also provided with an inner guide end 27 with a chamfered structure, and the front end of the outer peripheral wall of the insulating cap 2 is provided with an outer positioning end 26 with a chamfered structure. The beneficial effect is that this arrangement facilitates assembly and insertion / removal.
[0041] Furthermore, the rear wall of the front insertion hole 10 is provided with an end face annular groove and a central post, and the rear end gap sleeve of the return spring 4 is fitted into the end face annular groove and onto the central post. The beneficial effect is that this arrangement helps to obtain better axial movement accuracy.
[0042] Figures 6 to 7 The diagram schematically illustrates a connector according to one embodiment of the present invention. As shown, the connector includes: a charging gun and a charging socket that are mutually inserted and mated; the charging gun contains a plurality of the aforementioned pin modules 01, and the charging socket contains a plurality of socket modules 02.
[0043] The socket module 02 includes a socket body 6 and an anti-touch finger post 5. The socket body 6 has a spring sleeve 7 in the mounting groove of the insertion hole 60. The rear end of the anti-touch finger post 5 is connected to the center of the rear wall of the insertion hole 60, and the front end protrudes from the insertion hole 60. The front end of the pin body 1 passes through the insertion hole 60 with a uniform diameter and is interference-fitted with the spring sleeve 7. The anti-touch finger post 5 passes through the slide rail of the pin module 01 with a gap. Preferably, the rear end stud of the anti-touch finger post 5 is connected to the center screw hole of the rear wall of the insertion hole 60, and the front end is integrally coated with rubber to connect to an insulating head 8. The insulating head 8 protrudes from the insertion hole 60 and has a clearance fit with the slide rail. A metal rivet sleeve 9 is also riveted to the front end of the socket body 6. Preferably, the pin body 1 also has a first sealing ring groove in the middle, and the charging gun shell is sealed and connected to the first sealing ring groove by an O-ring. The socket body 6 also has a second sealing ring groove in the middle, and the charging base shell is sealed and connected to the second sealing ring groove by an O-ring.
[0044] The connector features a self-sealing pin module 01, which has the following advantages: the front end hole 10 of the pin module 01 remains clean for a long time as no dust, sand or other impurities can enter; the pin module 01 and the socket module 02 have good coupling contact and connection; the charging performance is efficient; the service life is long; and the safety is high.
[0045] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.
Claims
1. A dustproof pin module for new energy charging, characterized in that, Includes: a pin body (1), an insulating cap (2), a dustproof component (3), and a return spring (4); The center of one end face of the pin body (1) is provided with a front insertion hole (10); The rear end of the insulating cap (2) is snapped into the front end of the front insertion hole (10), and the first through hole (20) of the insulating cap (2) is connected to the front insertion hole (10) to form a slide. An annular step (21) is provided in the first through hole (20). The dustproof component (3) includes a column (30) slidably connected in the slide. The column (30) has a conical centering body (31) integrally provided at the rear end and a positioning shoulder (32) integrally provided at the front end to cooperate with the step (21). The centering body (31) has a core column (33) at the rear end. The rear end of the reset spring (4) is attached to the rear wall of the front insertion hole (10), and its front end is sleeved on the outside of the core post (33) and attached to the outer wall of the centering body (31). During charging, the pin module (01) is coupled to the insertion hole module (02). The anti-touch finger post (5) of the insertion hole module (02) pushes the dustproof part (3) to move inward and compresses the reset spring (4). When charging ends, the reset spring (4) causes the post (30) to slide to the first through hole (20) and the positioning shoulder (32) to fit tightly against the step (21), thereby sealing and protecting the front insertion hole (10).
2. The dustproof pin module for new energy charging according to claim 1, characterized in that, The first through hole (20) has a small-diameter circular port (22) at its front end, and the step (21) is integrally formed and connected between the port (22) and the first through hole (20); The front end of the column (30) is provided with a small-diameter end cap (34), and the positioning shoulder (32) is integrally formed and connected between the end cap (34) and the column (30). The port (22) and the end cap (34), the step (21) and the positioning shoulder (32) are respectively sleeved with equal diameter; the column (30) and the slide are sleeved with a small gap.
3. The dustproof pin module for new energy charging according to claim 2, characterized in that, The positioning shoulder (32) is a frustum, the step (21) is a frustum protrusion, and the inner wall of the step (21) and the outer wall of the frustum are closely fitted.
4. The dustproof pin module for new energy charging according to claim 1, characterized in that, The front insertion hole (10) is provided with an annular first slot (11) at the front end and an annular first head (12) located outside the first slot (11). The insulating cap (2) is provided with an annular second slot (23) in the middle of its outer peripheral wall and an annular second head (24) located behind the second slot (23). The first head (12) is press-fitted into the second slot (23) and the second head (24) is press-fitted into the first slot (11).
5. The dustproof pin module for new energy charging according to claim 4, characterized in that, Several axial notches (25) axially penetrate the second card head (24) and extend to the middle position of the second card slot (23). The rear side of the second card head (24) is also provided with an inner guide end (27) with a chamfered structure. The front end of the outer peripheral wall of the insulating cap (2) is provided with an outer positioning end (26) with a chamfered structure.
6. The dustproof pin module for new energy charging according to claim 1, characterized in that, The rear wall of the front insertion hole (10) is provided with an end face annular groove and a central post. The rear end of the reset spring (4) is inserted into the end face annular groove and sleeved with the central post.
7. The dustproof pin module for new energy charging according to claim 1, characterized in that, The dustproof component (3) is made of nylon plastic; the main body of the pin (1) is made of copper; and the reset spring (4) is a cylindrical axial compression spring.
8. A connector, characterized in that, include: A charging gun and a charging socket that are plugged into each other, wherein the charging gun is equipped with a plurality of pin modules (01) as described in any one of claims 1 to 7, and the charging socket is equipped with a plurality of socket modules (02). The socket module (02) includes a socket body (6) and an anti-touch finger post (5). The mounting groove of the insertion hole (60) of the socket body (6) is provided with a spring sleeve (7). The rear end of the anti-touch finger post (5) is connected to the center of the rear wall of the insertion hole (60) and the front end is exposed outside the insertion hole (60). The front end of the pin body (1) passes through the insertion hole (60) with an equal diameter and is interference-fitted with the spring sleeve (7). The anti-touch finger post (5) passes through the slide of the pin module (01) with a gap.
9. The connector according to claim 8, characterized in that, The front end of the anti-touch finger post (5) is integrally coated with rubber and connected to an insulating head (8). The insulating head (8) is exposed outside the insertion hole (60) and is in clearance fit with the slide rail. The front end of the insertion hole body (6) is also riveted with a metal rivet sleeve (9).
10. The connector according to claim 8, characterized in that, The pin body (1) is sealed to the charging gun housing by an O-ring in the middle; the socket body (6) is sealed to the charging base housing by an O-ring in the middle.