One-piece shell charging gun

Abstract

The present invention discloses an integrated shell type charging gun, comprising an integrated hollow shell, a charging plug arranged at the front end of the hollow shell, and a cable with one end inserted into the rear end of the hollow shell and connected to the charging plug, a pressure ring crimped to the outer periphery of the cable and having a polygonal shape is provided between the hollow shell and the cable, and a fixed bracket sleeved on the outer periphery of the cable and located outside the pressure ring is also provided between the hollow shell and the cable, the front end of the fixed bracket is fixedly engaged with the pressure ring, and the fixed bracket is fixedly connected to the inner wall of the hollow shell. The present invention increases the reliability and safety of the charging gun by adding a fixed bracket matched with the pressure ring in the hollow shell, and the cable has various functions such as anti-pull-out, anti-shrinkage and anti-twist. The structure is simple and easy to assemble and disassemble.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to an integrated shell type charging gun. Background Art

[0002] At present, most AC charging guns for electric vehicles adopt left and right shells or upper and lower shells. This type of structure usually uses screws to connect the two shells.

[0003] Disadvantages of non-integrated shells: The screw holes used to fix the two shells greatly affect the aesthetics of the product. Even if some products use invisible copper knurled columns, waterproofing is difficult to design. Generally, only the crimping area is waterproofed, and other areas inside the gun shell have no waterproof effect. When the user uses it, once water flows from the inside of the gun shell to the user's hand, the user will have a fear of electric shock and the comfort will be reduced.

[0004] The integrated gun shell can solve the above problems, but because the design of AC guns is more inclined to ordinary consumer products, the appearance is very important. At present, the AC charging gun cables in the form of integrated shells usually use internal pressed aluminum rings or small clamps to prevent the cables from being pulled off. According to the standard requirements, the charging gun cables need to meet the requirements of tension and torque. How to limit the activities of the aluminum rings or small clamps has become a problem that must be faced. The two commonly used forms are:

[0005] Integrated A. The tail of the AC charging gun adopts a threaded tail cap

[0006] shortcoming:

[0007] 1. The thread only provides axial anti-pull-out limit, and the circumferential direction relies only on the static friction of the seal, which is too weak. The torsional force of the cable will be directly reflected on the crimping point between the pin and the cable, reducing the reliability of the product.

[0008] 2. In terms of preventing the gun wire from shrinking inward, the static friction of the seal alone is too weak. During the assembly or use of the charging gun, the gun wire tends to shrink inward, which will directly act on the crimping point between the pin and the cable, reducing the reliability of the product.

[0009] Integrated B. The tail of the AC charging gun uses an upper and lower semicircle to bite the cable

[0010] shortcoming:

[0011] 1. Since the tail of the charging gun needs to simultaneously meet the four functions of axial pull-out, retraction, torsion, and waterproofing, the diameter of the tail parts often needs to be made very thick after stacking, which limits the flexibility of the overall shape and reduces the aesthetics. Summary of the invention

[0012] In view of the above-mentioned existing technical defects, the present invention provides an integrated shell type charging gun. By adding a fixing bracket that cooperates with a pressure ring in the hollow shell, the cable has various functions such as anti-pull-out, anti-shrinkage and anti-twist, thereby improving the reliability and safety of the charging gun. It also has the characteristics of simple structure and easy assembly and disassembly.

[0013] In order to solve the above technical problems, the present invention provides an integrated shell type charging gun, comprising an integrated hollow shell, a charging plug arranged at the front end of the hollow shell, and a cable with one end passed through the rear end of the hollow shell and connected to the charging plug, a pressure ring crimped to the outer periphery of the cable and in a polygonal shape is provided between the hollow shell and the cable, and a fixing bracket is also provided between the hollow shell and the cable, which is sleeved on the outer periphery of the cable and located on the outside of the pressure ring, the front end of the fixing bracket is engaged and fixed with the pressure ring, and the fixing bracket is fixedly connected to the inner wall of the hollow shell.

[0014] Furthermore, a receiving groove having the same shape as that of the pressure ring is provided at the front end of the fixing bracket, and the pressure ring is snap-fitted into the receiving groove.

[0015] Furthermore, at least two openings are provided through the outer periphery of the front end of the fixing bracket at positions corresponding to the accommodating grooves, and an elastic clip with one end connected to the fixing bracket is provided in the opening, and the other end of the elastic clip is engaged with the front end face of the pressure ring.

[0016] Furthermore, the rear end of the fixing bracket is fixedly connected to the hollow shell by screws.

[0017] Furthermore, the hollow shell is provided with a through hole running through from front to back, the rear end of the charging plug is snap-fitted into the front end of the through hole, one end of the cable is passed through the rear end of the through hole, the rear end periphery of the fixing bracket is provided with a plurality of screw holes for screws to pass through, and the inner wall of the through hole is provided with threaded holes corresponding to the screw holes.

[0018] Furthermore, a stop step for stopping the fixing bracket is provided on the inner wall of the through hole, an outer periphery of the rear end of the fixing bracket is provided with an outer limit platform abutting against the end surface of the stop step, the screw hole is provided on the outer limit platform, and the threaded hole is provided on the stop step.

[0019] Furthermore, an inner limit platform is provided on the inner side of the rear end of the pressure ring and abuts against the front end surface of the pressure ring.

[0020] Furthermore, a waterproof rubber pad and a tail cover are sequentially provided between the cable and the hollow shell from the inside to the outside and are sleeved on the outer circumference of the cable, and the waterproof rubber pad is located on the outside of the fixing bracket, and the outer side of the tail cover is buckled with the rear end of the hollow shell.

[0021] Furthermore, the shape of the pressure ring is a regular triangle, a regular quadrilateral, a regular pentagon or a regular hexagon.

[0022] Furthermore, the pressure ring is made of aluminum; and the fixing bracket is made of plastic in one piece.

[0023] The present invention has the following beneficial effects:

[0024] The present invention adds a fixing bracket engaged with the pressure ring in the hollow shell, and the fixing bracket is fixedly connected to the hollow shell, that is, the position and state of the two after assembly remain unchanged, and then the fixing bracket is used to fix the pressure ring, so that the position and state of the pressure ring remain unchanged, and then the cable crimped with the pressure ring is fixed, and all aspects of the force of the cable are basically borne by the fixing bracket, so that the cable has various functions such as anti-pull-out, anti-shrinkage and anti-twist, and the function is comprehensive and the fixing strength is higher, thereby improving the reliability and safety of the charging gun; in addition, since the structure for fixing the cable by the fixing bracket is deeply hidden in the shell, the appearance is more integrated and beautiful, and after solving this structural limitation, the appearance modeling scheme will be richer and more beautiful; and the through hole in the hollow shell can also be designed into a regular or irregular shape, which is convenient for product processing; and the waterproof rubber pad arranged on the outside of the fixing bracket is used for sealing. Since the cable is fixed by the fixing bracket, the waterproof rubber pad is not subjected to force, and there will be no sealing problem caused by movement or rotation, so that its waterproof performance is better and more reliable; the structure of the present invention also has the characteristics of simple structure and easy assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of a one-piece shell type charging gun in a half-section state in the embodiment;

[0027] Figure 2 It is an exploded schematic diagram of the one-piece shell type charging gun in the embodiment in a half-section state;

[0028] Figure 3 This is a schematic diagram of a fixed bracket and a cable after being assembled in an embodiment;

[0029] Figure 4 It is a half-section schematic diagram of the embodiment after the fixing bracket and the pressure ring are engaged and fixed. DETAILED DESCRIPTION

[0030] In order to more fully understand the technical content of the present invention, the present invention will be further introduced and illustrated in conjunction with the accompanying drawings and specific embodiments.

[0031] Example

[0032] like Figures 1 to 4 As shown, an integrated shell type charging gun shown in this embodiment includes an integrated hollow shell 1, a charging plug 2 arranged at the front end of the hollow shell 1, and a cable 3 with one end inserted into the rear end of the hollow shell 1 and connected to the charging plug 2. A pressing ring 4 crimped to the outer periphery of the cable 3 and in the shape of a regular hexagon is provided between the hollow shell 1 and the cable 3. The pressing ring and the cable are firmly fixed together by crimping to achieve synchronous action of the two. A fixing bracket 5 is also provided between the hollow shell 1 and the cable 3, which is sleeved on the outer periphery of the cable 3 and located on the outside of the pressing ring 4. The front end of the fixing bracket 5 is fixedly engaged with the pressing ring 4, so that the fixing bracket is used to fix the pressing ring, and then the cable is fixed, and the fixing bracket 5 is fixedly connected to the inner wall of the hollow shell 1; in the above structure, by adding A fixed bracket is engaged with the pressure ring, and the fixed bracket is fixedly connected to the hollow shell, that is, the position and state of the two after assembly remain unchanged, and then the fixed bracket is used to fix the pressure ring, so that the position and state of the pressure ring remain unchanged, thereby fixing the cable crimped with the pressure ring. The force of all aspects of the cable is basically borne by the fixed bracket, so that the cable has various functions such as anti-pull-out, retraction, and twisting. It is comprehensive in function and has higher fixing strength, which improves the reliability and safety of the charging gun; in addition, because the structure for fixing the cable by the fixed bracket is deeply hidden in the shell, the appearance is more integrated and beautiful. After solving this structural limitation, the appearance styling scheme will be richer and more beautiful, and the vias in the hollow shell for cable insertion can also be designed into regular or irregular shapes, which is convenient for adaptive processing of the product.

[0033] Specifically, the front end of the fixed bracket 5 is provided with a receiving groove 51 which has the same shape as the pressure ring 4, that is, the shape of the receiving groove is a regular hexagon, and the pressure ring 4 is clamped in the receiving groove 51. The pressure ring is fixed by clamping the receiving groove with the same shape, so that the positional relationship between the cable and the fixed bracket is relatively fixed, and the anti-twisting effect of the pressure ring and the cable in the circumferential direction can be better and conveniently achieved. The overall structure is simple and easy to disassemble and assemble. In practice, the size of the receiving groove is slightly larger than the size of the pressure ring, so that while the pressure ring is conveniently installed in the receiving groove, the cable has a large torsional gap in the circumferential direction due to the gap between the two is avoided as much as possible, thereby improving the reliability and safety of the charging gun.

[0034] In the present embodiment, at least two openings 52 distributed in a circular array are penetrated through the front end periphery of the fixed bracket 5 at the position corresponding to the accommodating groove 51; in a specific embodiment, the front end periphery of the fixed bracket 5 is in the same shape as the accommodating groove 51, that is, a accommodating portion 53 in the shape of a regular hexagon is formed at the front end of the fixed bracket 5, the accommodating groove 51 is arranged in the middle of the accommodating portion, and three openings 52 are arranged on the accommodating portion 53, and the three openings are arranged at intervals on three of the surfaces of the accommodating portion, and an elastic buckle 54 which is connected to the fixed bracket at one end and is integrally formed is arranged in the opening 52, and the other end of the elastic buckle 54 is engaged with the front end face of the pressure ring 4, and the three evenly distributed elastic buckles are used to make the buckling structure evenly stressed, thereby improving the reliability of the buckling structure.

[0035] In this embodiment, the rear end of the fixing bracket 5 is fixedly connected to the hollow shell body 1 by screws 6, which is convenient for assembly and disassembly, and the fixing structure is firm and reliable; specifically, a through hole 11 is provided on the hollow shell body 1 to penetrate from front to back, the rear end of the charging plug 2 is snap-fitted into the front end of the through hole 11, and one end of the cable 3 is passed through the rear end of the through hole 11. A plurality of screw holes 55 for the screws 6 to pass through are provided on the outer periphery of the rear end of the fixing bracket 5, and threaded holes 12 corresponding to the screw holes 55 are provided on the inner wall of the through hole 11, so that the screws can be threadedly connected with the threaded holes after passing through the screw holes, thereby fixing the fixing bracket, the pressure ring and the cable.

[0036] Specifically, a stop step 13 for stopping the fixed bracket 5 is provided on the inner wall of the through hole 11, and an outer limit platform 56 abutting against the end face of the stop step 13 is provided on the outer periphery of the rear end of the fixed bracket 5, thereby forming a limiting structure for preventing the fixed bracket from moving forward, realizing the positioning of the fixed bracket and the function of preventing the cable from shrinking inward, the screw hole 55 is provided on the outer limit platform 56, and the threaded hole 12 is provided on the stop step 13; a plurality of inner limit platforms 57 abutting against the front end face of the pressure ring 4 and being arc-shaped are provided on the inner side of the rear end of the pressure ring 4, thereby forming a limiting structure for preventing the fixed bracket from moving backward, realizing the positioning of the fixed bracket and the function of preventing the cable from being pulled out.

[0037] Specifically, a waterproof rubber pad 7 and a tail cover 8 are sequentially provided between the cable 3 and the hollow shell 1 from the inside to the outside, and the waterproof rubber pad 7 is located on the outside of the fixed bracket 5, and the outside of the tail cover 8 is buckled with the rear end of the hollow shell 1; the waterproof rubber pad arranged on the outside of the fixed bracket is used for sealing. Since the cable is fixed by the fixed bracket, the waterproof rubber pad is not subjected to force, and there will be no sealing problems caused by movement or rotation, so that its waterproof performance is better and more reliable.

[0038] In other embodiments, the shape of the pressure ring 4 may also be a regular triangle, a regular quadrilateral, a regular pentagon, etc.

[0039] In other embodiments, the pressure ring is made of aluminum; the fixing bracket is made of plastic in one piece, which is suitable for mass production.

[0040] In other embodiments, the charging plug includes a plug housing engaged with the front end of the hollow housing and a socket terminal or a pin disposed in the plug housing.

[0041] The specific assembly process of the charging gun in the above embodiment is: first, put the tail cover, the waterproof rubber pad and the fixed bracket on the cable in sequence, and then crimp the pressure ring on the outer periphery of the cable, pass one end of the cable through the hollow shell and connect it to the charging plug, and then assemble the charging plug and the hollow shell together; then pull the cable back so that the pressure ring on it is stuck in the fixed bracket, and then assemble the fixed bracket and the hollow shell together with screws, and finally assemble the waterproof rubber pad and the tail cover into place, and use the tail cover and the fixed bracket to press the waterproof rubber pad to complete the assembly.

[0042] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An integrated shell type charging gun, comprising an integrated hollow shell, a charging plug arranged at the front end of the hollow shell, and a cable with one end passing through the rear end of the hollow shell and connected to the charging plug, characterized in that: A compression ring crimped to the outer circumference of the cable and having a polygonal shape is provided between the hollow shell and the cable, and a fixing bracket sleeved on the outer circumference of the cable and located outside the compression ring is also provided between the hollow shell and the cable, the front end of the fixing bracket is fixedly engaged with the compression ring, and the fixing bracket is fixedly connected to the inner wall of the hollow shell; The rear end of the fixing bracket is fixedly connected to the hollow shell by screws; the front end of the fixing bracket is provided with a receiving groove with the same shape as the pressure ring, and the pressure ring is clamped in the receiving groove, and the shapes of the pressure ring and the receiving groove are both regular hexagons; at least two openings are penetrated through the outer periphery of the front end of the fixing bracket at positions corresponding to the receiving grooves, and an elastic clip with one end connected to the fixing bracket is provided in the opening, and the other end of the elastic clip is clamped with the front end face of the pressure ring, and an inner limit platform abutting against the rear end face of the pressure ring is provided on the inner side of the rear end of the fixing bracket.

2. The one-piece shell charging gun according to claim 1, characterized in that: The hollow shell is provided with a through hole extending from front to back, the rear end of the charging plug is snap-fitted into the front end of the through hole, one end of the cable is passed through the rear end of the through hole, a plurality of screw holes for screws to pass through are provided on the outer periphery of the rear end of the fixing bracket, and threaded holes corresponding to the screw holes are provided on the inner wall of the through hole.

3. The one-piece shell charging gun according to claim 2, characterized in that: A stop step for stopping the fixing bracket is provided on the inner wall of the through hole, an outer periphery of the rear end of the fixing bracket is provided with an outer limit platform abutting against the end surface of the stop step, the screw hole is provided on the outer limit platform, and the threaded hole is provided on the stop step.

4. The one-piece shell type charging gun according to any one of claims 1 to 3, characterized in that: A waterproof rubber pad and a tail cover are sequentially arranged between the cable and the hollow shell from the inside to the outside and are sleeved on the outer circumference of the cable. The waterproof rubber pad is located on the outside of the fixing bracket, and the outer side of the tail cover is buckled with the rear end of the hollow shell.

5. The one-piece shell charging gun according to claim 4, characterized in that: The pressing ring is made of aluminum; the fixing bracket is made of plastic in one piece.

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