Replaceable terminal and charging gun

Abstract

The utility model discloses a replaceable terminal and a charging gun, the replaceable terminal comprises a terminal main body, a welding main body and a fixing piece, an inner cavity is formed in the terminal main body, a torsion spring electrically connected with the terminal main body is arranged on the peripheral wall of the inner cavity, the inner cavity is provided with a charging opening at the first end of the terminal main body, and the welding main body is arranged in the charging opening. The inner cavity is provided with a through hole at the second end of the terminal main body; a mounting groove is formed in the welding body, the second end of the terminal body can be inserted into the mounting groove, and a fixing hole is formed in the position, corresponding to the through hole, of the bottom of the mounting groove; one part of the structure of the fixing piece is used for penetrating through the through hole and being detachably connected with the fixing hole, and the other part of the structure of the fixing piece is used for abutting against the terminal main body in the inner cavity, so that the terminal main body is detachably fixed on the welding main body, and the terminal main body is in electric contact with the welding main body. According to the technical scheme of the utility model, the welding main body can be welded with the cable, and then the terminal main body is installed on the welding main body, so that the torsional spring is prevented from being damaged in the welding process.

Description

Technical Field

[0001] The utility model relates to the technical field of charging terminals, in particular to a replaceable terminal and a charging gun. Background Art

[0002] The charging gun is a key component in an electric vehicle charging system, and one of its core components is the terminal. The terminal is responsible for establishing an electrical connection between the electric vehicle and the charging station during charging, ensuring safe and efficient energy transfer. A typical charging gun terminal typically consists of the terminal body, internal conductive structures (such as a torsion spring), and the portion that connects to the cable.

[0003] Traditional terminal structures typically utilize an integrated design, securing the terminal body and cable connection together. This design presents challenges during production, particularly during the terminal-to-cable connection phase. For example, when ultrasonic welding is used to connect the terminal to the cable, the high-frequency vibrations can damage sensitive internal structures (such as torsion springs), impacting the terminal's performance and lifespan. Utility Model Content

[0004] The main purpose of the utility model is to provide a replaceable terminal, which aims to solve the technical problem that when the existing terminal is connected to the cable through ultrasonic welding technology, the sensitive structure inside the terminal (such as the torsion spring) is easily damaged.

[0005] To achieve the above-mentioned purpose, the replaceable terminal proposed in the present invention includes a terminal body, a welding body and a fixing part, an inner cavity is formed in the terminal body, and a torsion spring electrically connected to the terminal body is provided on the peripheral wall of the inner cavity, the inner cavity forms a charging opening at the first end of the terminal body, and the inner cavity forms a through hole at the second end of the terminal body; the welding body forms a mounting groove, the second end of the terminal body can be inserted into the mounting groove, and a fixing hole is provided on the bottom of the mounting groove at a position corresponding to the through hole; a part of the structure of the fixing part is used to pass through the through hole and be detachably connected to the fixing hole, and another part of the structure of the fixing part is used to abut the terminal body in the inner cavity, so as to detachably fix the terminal body on the welding body and make the terminal body electrically contact with the welding body.

[0006] Optionally, the fixing hole is a threaded hole, the fixing member is a screw, the screw portion of the screw is threadedly connected to the threaded hole, and the head diameter of the screw is larger than the diameter of the through hole so as to abut against the terminal body.

[0007] Optionally, the head of the screw abuts against the terminal body through an elastic pad.

[0008] Optionally, a peripheral wall of the terminal body located within the mounting groove is in electrical contact with the peripheral wall of the mounting groove via a conductive elastic member.

[0009] Optionally, the conductive elastic member is a contact spring surrounding the terminal body.

[0010] Optionally, an annular groove is provided on a peripheral wall of the terminal body located within the mounting groove, the elastic member is arranged around the bottom of the annular groove, and at least part of the elastic member extends from the notch of the annular groove.

[0011] The utility model further proposes a charging gun, comprising a gun body and a replaceable terminal, the replaceable terminal comprising a terminal body, a welding body and a fixing piece, the terminal body forming an inner cavity, a peripheral wall of the inner cavity being provided with a torsion spring electrically connected to the terminal body, the inner cavity forming a charging opening at a first end of the terminal body, and the inner cavity forming a through hole at a second end of the terminal body; the welding body forming a mounting groove, the second end of the terminal body being insertable into the mounting groove, a fixing hole being provided on the bottom of the mounting groove at a position corresponding to the through hole; a part of the fixing piece is structured to pass through the through hole and be detachably connected to the fixing hole, and another part of the fixing piece is structured to abut against the terminal body in the inner cavity, so as to detachably fix the terminal body to the welding body and make the terminal body electrically contact with the welding body;

[0012] The replaceable terminal is arranged on the gun body.

[0013] Optionally, the gun body is formed with a boss hole, the replaceable terminal is arranged in the boss hole, and the outer peripheral wall of the replaceable terminal contacts the inner peripheral wall of the boss hole through a sealing ring.

[0014] Optionally, the welding body of the replaceable terminal is fixed to the gun body by snap-fitting.

[0015] The replaceable terminal of this utility model is divided into two detachable parts: the terminal body and the welding body. Fixtures are used to securely connect the two. This design allows the welding step to be separated from the terminal body during production. This innovative structure allows the sensitive terminal body (including the internal torsion spring) to be temporarily removed from the assembly process during cable welding, effectively preventing potential damage to critical components such as the torsion spring caused by high-frequency vibration during ultrasonic welding. This detachable design also significantly improves the maintainability of the product, allowing targeted repair or replacement of problematic components without having to replace the entire assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of an embodiment of the replaceable terminal of the utility model;

[0018] Figure 2 for Figure 1 sectional view of

[0019] Figure 3 for Figure 1 Schematic diagram of the decomposition;

[0020] Figure 4 This is an exploded schematic diagram of an embodiment of a charging gun of the present utility model;

[0021] Figure 5 for Figure 4 Schematic diagram of the structure of the gun head;

[0022] Figure 6 for Figure 4 A cross-sectional view of the various components after assembly;

[0023] Figure 7 for Figure 6 Enlarged schematic diagram of point A in the middle.

[0024] Description of Figure Numbers:

[0025] 100. Replaceable terminal; 1. Terminal body; 11. Inner cavity; 12. First end; 121. Charging opening; 13. Second end; 131. Through hole; 14. Annular groove; 2. Welding body; 21. Mounting groove; 22. Fixing hole; 3. Fixing member; 31. Screw; 4. Torsion spring; 5. Conductive elastic member; 51. Contact spring; 6. Sealing ring; 200. Gun body; 201. Housing; 202. Mounting plate; 203. Gun head; 203a. Boss hole.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in this utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, and must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0030] The present invention provides a replaceable terminal 100 .

[0031] In the embodiment of the present utility model, Figures 1 to 3 As shown, the replaceable terminal 100 includes a terminal body 1, a welding body 2 and a fixing part 3, an inner cavity 11 is formed in the terminal body 1, and a torsion spring 4 electrically connected to the terminal body 1 is provided on the peripheral wall of the inner cavity 11, the inner cavity 11 forms a charging opening 121 at the first end 12 of the terminal body 1, and the inner cavity 11 forms a through hole 131 at the second end 13 of the terminal body 1; the welding body 2 forms a mounting groove 21, the second end 13 of the terminal body 1 can be inserted into the mounting groove 21, and a fixing hole 22 is provided on the bottom of the mounting groove 21 at a position corresponding to the through hole 131; a part of the structure of the fixing part 3 is used to pass through the through hole 131 and be detachably connected to the fixing hole 22, and another part of the structure of the fixing part 3 is used to abut the terminal body 1 in the inner cavity 11, so as to detachably fix the terminal body 1 on the welding body 2 and make the terminal body 1 electrically contact with the welding body 2.

[0032] In this embodiment, the terminal body 1 can be a hollow structure made of a conductive metal material such as a copper alloy or stainless steel. The fixing member 3 can be a screw 31, a pin, or other fastening element capable of achieving a detachable connection. The fixed connection between the fixing member 3 and the fixing hole 22 can be achieved in various ways, such as the fixing member 3 being a screw 31 and the fixing hole 22 being a threaded hole, or the fixing member 3 and the fixing hole 22 being an interference fit.

[0033] The electrical contact between the terminal body 1 and the welding body 2 can be achieved in a variety of ways. For example, a conductive elastic member 5, such as a finger spring 51 or a metal spring, can be provided between the outer wall of the terminal body 1 and the inner wall of the mounting groove 21 to ensure a reliable electrical connection between the two parts. In addition, the second end 13 of the terminal body 1 can directly abut against the bottom wall of the mounting groove 21. In addition, the fixing member 3 itself can also be made of a conductive material to achieve electrical connection through direct contact with the terminal body 1 and the welding body 2. The electrical connection between the torsion spring 4 and the terminal body 1 can be achieved by direct welding, crimping or other mechanical fixing methods to ensure that the torsion spring 4 can reliably conduct current.

[0034] As can be understood, the replaceable terminal 100 of the present invention, by dividing its structure into two detachable parts—a terminal body 1 and a welding body 2—and employing a fixing member 3 to achieve a reliable connection between the two, allows the welding step to be separated from the terminal body 1 during production. This innovative structure allows the sensitive terminal body 1 (including the internal torsion spring 4) to be temporarily removed from assembly during cable welding, effectively preventing potential damage to key components such as the torsion spring 4 from high-frequency vibrations during ultrasonic welding. Furthermore, this detachable design significantly improves the product's maintainability, allowing targeted repair or replacement of problematic components without having to replace the entire assembly.

[0035] Optionally, the fixing hole 22 is a threaded hole, the fixing member 3 is a screw 31, the screw portion of the screw 31 is threadedly connected to the threaded hole, and the head diameter of the screw 31 is larger than the diameter of the through hole 131 for abutting the terminal body 1.

[0036] In this embodiment, the fixing hole 22 is specifically defined as a threaded hole, a hole structure with a threaded inner wall. The fixing member 3 is specifically defined as a screw 31, which is typically made of metal and comprises two main parts: a shank and a head. The shank is the rod-shaped portion of the screw 31, with threads on its outer surface that match the threaded hole. The head is the wider portion at the top of the screw 31, typically used to apply torque. Its shape can be various, such as a cross, a straight line, or a hexagonal shape, to accommodate different tools.

[0037] It is not difficult to understand that the threaded connection provides stronger mechanical strength and a more reliable fixing effect, and can remain stable under various stresses during the charging process. Secondly, the screw 31 connection method is easy to disassemble and reinstall, which greatly improves the maintainability and reusability of the product. Furthermore, the design of the head of the screw 31 being larger than the diameter of the through hole 131 not only plays a fixing role, but also can play a sealing role to a certain extent, preventing external contaminants from entering the connection between the screw 31 and the threaded hole.

[0038] Optionally, the head of the screw 31 abuts against the terminal body 1 through an elastic pad.

[0039] In this embodiment, the elastic pad is a resilient gasket or washer, usually made of a material with a certain degree of elasticity, such as rubber, elastic polymer or some metal spring material. The main function of the elastic pad is to provide a compressible buffer layer between the head of the screw 31 and the terminal body 1.

[0040] The elastic pad can compensate for the tiny gaps caused by manufacturing errors or thermal expansion and contraction, ensuring that the screw 31 always remains tightened, thereby improving the reliability of the connection. Secondly, the elastic pad can absorb and disperse stress, reducing the local stress concentration that may be caused to the terminal body 1 during the tightening process of the screw 31, thereby extending the service life of the component. Furthermore, the elastic pad can play a certain sealing role, preventing moisture or other contaminants from entering the interior of the terminal through the connection of the screw 31. In addition, the elastic pad also has an anti-loosening effect, which can reduce the problem of loosening of the screw 31 caused by vibration or temperature changes, and improve the stability of the entire connection. Finally, when multiple disassembly and assembly are required, the elastic pad can protect the surface of the terminal body 1 to prevent wear that may be caused during repeated disassembly and assembly.

[0041] Optionally, the peripheral wall of the terminal body 1 located in the installation groove 21 is in electrical contact with the peripheral wall of the installation groove 21 through a conductive elastic member 5 .

[0042] In this embodiment, the conductive elastic member 5 is a structure that is both elastic and conductive, and may be a metal spring, conductive rubber, or an element made of other conductive elastic materials.

[0043] It is not difficult to understand that the conductive elastic member 5 can compensate for the manufacturing tolerances or installation errors that may exist between the terminal body 1 and the mounting groove 21, ensuring that a reliable electrical connection can be maintained even in the presence of a small gap. Secondly, the elastic contact can reduce the wear of the contact points caused by vibration, temperature changes or repeated plugging and unplugging, thereby extending the service life of the contact points. Furthermore, the elastic contact can provide continuous pressure, maintaining a stable contact resistance even after long-term use, thereby improving the reliability and stability of the electrical connection. Finally, the use of the conductive elastic member 5 ensures that the connection between the terminal body 1 and the welding body 2 has sufficient mechanical strength while maintaining a certain degree of flexibility, which helps to absorb external shocks and stresses and improves the durability of the entire assembly.

[0044] Optionally, the conductive elastic member 5 is a contact spring 51 surrounding the terminal body 1 .

[0045] Specifically, the finger spring 51 is a specially designed elastic conductive element, typically made of a metal material with excellent conductivity and elasticity (such as beryllium copper or stainless steel). Its structural feature is a ring-shaped or cylindrical base with multiple slender elastic fingers evenly distributed. These fingers can undergo elastic deformation in the radial direction.

[0046] The multi-point contact design of the contact finger spring 51 greatly increases the contact area and improves the current conduction efficiency. Secondly, the elastic contact fingers of the contact finger spring 51 can deform independently, which means that even in the presence of slight dimensional deviations or surface unevenness, each contact finger can maintain good contact, improving the reliability of the connection. Furthermore, the design of the contact finger spring 51 allows for a certain amount of relative movement between the terminal body 1 and the mounting slot 21 while maintaining a good electrical connection. This helps absorb the stress caused by vibration and thermal expansion, extending the service life of the connection components. In addition, the metal material and special design of the contact finger spring 51 give it excellent elastic recovery and fatigue resistance, and it can maintain stable contact pressure even after long-term use and multiple plugging and unplugging. Finally, the design of the contact finger spring 51 also has a certain self-cleaning effect. During the plugging and unplugging process, the slight movement of the contact fingers can help remove oxides or contaminants from the contact surface and maintain a good contact state.

[0047] Optionally, an annular groove 14 is provided on the peripheral wall of the terminal body 1 within the mounting groove 21 , the conductive elastic member 5 is arranged around the bottom of the annular groove 14 , and at least part of the conductive elastic member 5 extends from the notch of the annular groove 14 .

[0048] Specifically, the annular groove 14 refers to a groove structure that surrounds the entire circumference and is provided on the outer wall of the terminal body 1. It is not difficult to understand that the annular groove 14 provides a stable installation position for the conductive elastic member 5, preventing the conductive elastic member 5 from being displaced or falling off during use, thereby improving the reliability and stability of the connection. Secondly, the depth of the annular groove 14 can accurately control the height of the conductive elastic member 5 extending out, thereby ensuring that there is appropriate pressure between the conductive elastic member 5 and the installation groove 21, and it will not be damaged due to excessive pressure, nor will it cause poor contact due to insufficient pressure. Furthermore, the design of the annular groove 14 allows most of the volume of the conductive elastic member 5 to be hidden in the groove, reducing the overall diameter of the terminal body 1, facilitating insertion and removal, and also protecting the conductive elastic member 5 from direct damage by external forces. In addition, this design also allows the use of a larger and stronger conductive elastic member 5 without increasing the overall size of the terminal body 1, thereby providing better contact performance. Finally, the design of the annular groove 14 provides space for the deformation of the conductive elastic member 5, so that the conductive elastic member 5 can shrink into the groove when under pressure. This not only protects the conductive elastic member 5, but also makes the entire connection system have a better elastic range and adaptability.

[0049] The utility model also proposes a charging gun, see Figures 4 to 7 The charging gun includes a gun body 200 and a replaceable terminal 100. The specific structure of the replaceable terminal 100 is similar to the above-mentioned embodiments. Since this charging gun adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be described in detail here. The replaceable terminal 100 is provided on the gun body 200.

[0050] Specifically, the charging gun is a key component used to connect electric vehicles and charging equipment. The gun body 200 is the primary structural component of the charging gun and consists of three main parts: a housing 201, a mounting plate 202, and a gun head 203. The housing 201 is the outer structure of the charging gun, typically made of a durable insulating material such as engineering plastic, protecting the internal components and providing a gripping surface. The mounting plate 202 is a structural member located within the housing 201 that secures and supports the various internal components. The gun head 203 is the portion of the charging gun that directly interfaces with the vehicle's charging port and typically includes a docking mechanism and a sealing structure.

[0051] Optionally, the gun body 200 is formed with a boss hole 203a, the replaceable terminal 100 is disposed within the boss hole 203a, and the outer peripheral wall of the replaceable terminal 100 contacts the inner peripheral wall of the boss hole 203a via a sealing ring 6. Specifically, the sealing ring 6 can be mounted on the terminal body 1 or the welding body 2, and is not specifically limited here.

[0052] In this embodiment, the boss hole 203a refers to a hole in the cylindrical structure provided on the gun head 203. The sealing ring 6 is an annular sealing element, usually made of an elastic material such as rubber or silicone. Its main function is to form a seal between two components to prevent the intrusion of foreign matter such as water and dust.

[0053] As you can see, the use of sealing ring 6 not only provides excellent waterproofing but also absorbs vibrations to a certain extent, reducing mechanical shock to the terminals. Furthermore, this design makes the terminals easier to remove and replace, improving the maintainability of the product. The use of sealing ring 6 also compensates for minor tolerances during manufacturing and installation, ensuring a good seal even under varying temperature conditions.

[0054] Optionally, the welding body 2 of the replaceable terminal 100 is snap-fastened to the gun body 200. This snap-fastening of the welding body 2 to the gun body 200 can be achieved in a variety of specific ways. For example, the welding body 2 can be designed with grooves or slots, while the gun body 200 (which can be on the mounting plate 202 or inside the housing 201) is designed with corresponding protrusions or claws. When the welding body 2 is inserted into the gun body 200, these protrusions and grooves engage with each other, forming a secure mechanical connection. Another possible implementation is to design elastic clips on the gun body 200. When the welding body 2 is inserted, these clips automatically snap onto specific structures on the welding body 2.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A replaceable terminal, characterized in that: include: A terminal body (1), wherein an inner cavity (11) is formed in the terminal body (1), a torsion spring (4) electrically connected to the terminal body (1) is provided on a peripheral wall of the inner cavity (11), the inner cavity (11) is formed with a charging opening (121) at a first end (12) of the terminal body (1), and the inner cavity (11) is formed with a through hole (131) at a second end (13) of the terminal body (1); A welding body (2), wherein the welding body (2) is formed with a mounting groove (21), the second end (13) of the terminal body (1) can be inserted into the mounting groove (21), and a fixing hole (22) is provided on the bottom of the mounting groove (21) at a position corresponding to the through hole (131); A fixing member (3), wherein a portion of the fixing member (3) is configured to pass through the through hole (131) and be detachably connected to the fixing hole (22), and another portion of the fixing member (3) is configured to abut against the terminal body (1) in the inner cavity (11) to detachably fix the terminal body (1) to the welding body (2) and to electrically contact the terminal body (1) with the welding body (2).

2. The replaceable terminal according to claim 1, characterized in that: The fixing hole (22) is a threaded hole, the fixing member (3) is a screw (31), the screw portion of the screw (31) is threadedly connected to the threaded hole, and the head diameter of the screw (31) is larger than the diameter of the through hole (131) so as to abut against the terminal body (1).

3. The replaceable terminal according to claim 2, characterized in that: The head of the screw (31) abuts against the terminal body (1) via an elastic pad.

4. The replaceable terminal according to claim 1, characterized in that: The peripheral wall of the terminal body (1) located in the installation groove (21) is in electrical contact with the peripheral wall of the installation groove (21) via a conductive elastic member (5).

5. The replaceable terminal according to claim 4, characterized in that: The conductive elastic member (5) is a finger spring (51) surrounding the terminal body (1).

6. The replaceable terminal according to claim 4, characterized in that: An annular groove (14) is provided on the peripheral wall of the terminal body (1) located within the mounting groove (21); the conductive elastic member (5) is arranged around the bottom of the annular groove (14), and at least part of the conductive elastic member (5) extends from the notch of the annular groove (14).

7. A charging gun, characterized in that: include: Gun body (200); The replaceable terminal (100) according to any one of claims 1 to 6, wherein the replaceable terminal (100) is provided on the gun body (200).

8. The charging gun according to claim 7, characterized in that: The gun body (200) is formed with a boss hole (203a), the replaceable terminal (100) is arranged in the boss hole (203a), and the outer peripheral wall of the replaceable terminal (100) contacts the inner peripheral wall of the boss hole (203a) through a sealing ring (6).

9. The charging gun according to claim 7, characterized in that: The welding body (2) of the replaceable terminal (100) is fixedly connected to the gun body (200).

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