High-power charging gun liquid cooling cable sealing and fixing structure

Abstract

The utility model provides a high-power charging gun liquid cooling cable sealing and fixing structure, which comprises a sealing and fixing clamp and a cable body, the sealing and fixing clamp comprises a central member and elastic arms, the central member is connected with the elastic arms end to end to form a closed structure for accommodating the cable body, and the closed structure is sleeved on the outer edge surface of the cable body; the outer edge face of the center component is provided with a guide inclined face in the axial direction, so that the section of the center component becomes wider in the direction of the guide inclined face. According to the utility model, the baffle sheet is additionally arranged at the tail part of the gun body and the sealing and fixing clamp with a cantilever structure is adopted to wrap, extrude and occlude the cable, so that the cable is effectively fixed, the problem of insufficient sealing and fixing in the existing design is solved, the waterproof performance when the DC terminal is electrically connected with the cable body and the fixing stability of the cable body are obviously improved, and the service life of the cable body is prolonged. Therefore, the connector is suitable for high-reliability electrical connection in a complex environment.

Description

Technical Field

[0001] The utility model relates to the technical field of charging guns, and in particular to a liquid-cooling cable sealing and fixing structure for a high-power charging gun. Background Art

[0002] In the prior art, there are many defects in the sealing structure between the DC terminal and the cable, and in the sealing and fixing of the cable and the tail of the gun body. For example, in the existing DC terminal sealing design, the DC terminal sealing ring is circular. After the DC terminal tail and the cable are pressed together, the size of the metal terminal pressing part is irregular, causing interference between the DC terminal tail and the inner wall of the double-pass, thereby reducing the pre-compression amount of the sealing ring or partially not pressing together, causing leakage at the connection. In addition, since the hollow structure of the cable is easily deformed after being compressed, the cable sealing ring in the existing design only uses surface contact, and the sealing effect is poor, making it still easy to leak after pre-compression.

[0003] At the same time, in the cable sealing structure at the rear of the gun body, the existing design lacks an effective fixing mechanism, resulting in the cable being able to be pulled back and forth even if the screws are locked, which cannot meet the cable tension test requirements and is prone to internal leakage when the cable is pulled. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-power charging gun liquid cooling cable sealing and fixing structure to solve the problems raised in the above background technology. This utility model solves the problems in the prior art by optimizing the sealing structure of the DC terminal and the cable and the fixing method of the gun body and the cable.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: A high-power charging gun liquid-cooled cable sealing and fixing structure, including a sealing fixing clamp and a cable body, wherein the sealing fixing clamp includes a central component and an elastic arm, the central component is connected end to end, and the elastic arm forms a closed structure for accommodating the cable body, which is sleeved on the outer edge surface of the cable body; the outer edge surface of the central component is provided with a guide bevel along the axial direction, so that the cross-section of the central component changes from narrow to wide along the direction of the guide bevel.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] The present utility model enlarges the inner diameter of the double-pass, modifies the sealing ring of the DC terminal into an annular washer structure, increases the diameter of the sealing ring, and achieves the effects of improving the preloading area and sealing. At the same time, an annular protrusion is added to the structure of the cable sealing ring to play a role in adapting to the deformation of the hollow part of the cable. At the tail of the gun body, a retaining piece and a sealing and fixing clamp with a cantilever structure are added. By wrapping and squeezing the cable, the cable is effectively fixed, solving the problems of insufficient sealing and fixing in the existing design, significantly improving the waterproof performance when the DC terminal realizes electrical connection with the cable body and the fixing stability of the cable body itself, and making the present utility model applicable to highly reliable electrical connections in complex environments. Description of the Drawings

[0008] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0009] Figure 1 It is a schematic diagram of the sealing structure of the cable body and the tail of the charging gun proposed in an embodiment of the present utility model;

[0010] Figure 2 It is a schematic diagram of the overall structure of the sealing and fixing clamp proposed in an embodiment of the present utility model;

[0011] Figure 3A It is a schematic diagram of the main cross-sectional structure of the sealing and fixing clamp proposed in an embodiment of the present utility model;

[0012] Figure 3B It is a schematic diagram of the cross-sectional structure of the sealing and fixing clamp having a trapezoidal profile proposed in an embodiment of the present utility model

[0013] Figure 4 It is a schematic diagram of the sealing structure of the DC terminal and the cable body proposed in an embodiment of the present utility model;

[0014] Figure 5 It is a schematic diagram of the overall structure of the cable sealing ring proposed in an embodiment of the present utility model;

[0015] Figure 6A It is a schematic diagram of the main cross-sectional structure of the cable sealing ring proposed in an embodiment of the present utility model;

[0016] Figure 6B It is a schematic diagram of the cross-sectional structure of the cable sealing ring having a trapezoidal profile proposed in an embodiment of the present utility model;

[0017] Figure 7 It is a schematic diagram of the sealing barrier structure formed by the cable sealing ring along the length direction of the cable body in an embodiment of the present utility model.

[0018] Reference Signs:

[0019] 1 - charging gun, 2 - sealing and fixing fixture, 21 - central member, 211 - guiding inclined surface, 212 - screw hole, 22 - elastic arm, 3 - cable body, 4 - DC terminal, 5 - DC sealing assembly, 51 - double-pass nut, 52 - double-pass member, 53 - cable sealing ring, 531 - annular protrusion, 54 - cable washer, 55 - DC terminal sealing ring, 6 - retaining piece, 7 - screw, 8 - charging gun tail plug, 9 - sealing silica gel. Detailed Embodiment

[0020] It is easily understandable that according to the technical solution of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can propose various structural forms and implementation methods that can be mutually replaced. Therefore, the following detailed embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0021] As an embodiment of the present invention, a technical solution is provided: a liquid-cooled cable sealing and fixing structure for a high-power charging gun, including: a sealing and fixing fixture and a cable body.

[0022] During specific implementation, as Figure 1 shown, in the cable sealing structure at the tail of the gun body, the existing design lacks an effective fixing mechanism, resulting in the cable still being able to be pulled back and forth even after locking the screw, which cannot meet the cable tensile test requirements, and internal leakage is likely to occur when pulling the cable. Therefore, the sealing and fixing fixture 2 proposed by the present invention, as Figure 2 shown, includes a central member 21 and an elastic arm 22. The central member 21 is connected end to end with the elastic arm 22 to form a closed structure for accommodating the cable body 3, which is sleeved on the outer edge surface of the cable body 3; a guiding inclined surface 211 is provided along the axial direction on the outer edge surface of the central member 21, so that the cross-section of the central member 21 becomes wider from narrow along the direction of the guiding inclined surface 211, as Figures 3A - 3B shown, forming a trapezoidal profile from top to bottom. At the same time, the guiding inclined surface 211 abuts against and is embedded in the connection between the charging gun 1 and the cable body 3 to achieve the fixation and sealing of the cable body 3. A screw hole 212 for positioning is provided at the inclined edge of the guiding inclined surface 211.

[0023] Based on the above technical concept, it should be noted that since the cable is relatively thick and not easily deformed, and there is no wire accommodation space inside the gun body, the conventional method of first fixing the cable with a metal ring and then inserting it into the gun body cannot be used for cable fixation. Therefore, the sealing and fixing fixture 2 adopts a cantilever structure. After this part is assembled and inserted into the gun body, it wraps around the cable and squeezes and bites the cable, which can play a role in fixing the cable. At the same time, a retaining piece 6 needs to be added at the connection between the charging gun 1 and the cable body 2. The retaining piece 6 is sleeved on the outer edge surface of the cable body 3 to provide additional support and fixation between the sealing and fixing fixture 2 and the cable body 3, preventing the sealing and fixing fixture 2 from moving inside the charging gun 1.

[0024] It can be understood that the aforementioned central member 21, as the core component of the sealing and fixing fixture 2, its function is to provide the space necessary for fixing the cable. During the specific design, the diameter of the cable body 3 and the required fixing force need to be considered. The shape and size of the central member 21 are customized according to the diameter of the cable body 3 and the fixing requirements, so as to ensure that the cable body 3 is properly supported and fixed. At the same time, the elastic arm 22 must have the ability of elastic deformation. The elastic arm 22 plays a crucial role through its elastic deformation ability, that is, when the cable body 3 is placed in the charging gun 1, the elastic arm 22 can adaptively apply pressure to achieve clamping and fixing of the cable body 3, and the effect of applying pressure inward to clamp the cable body 3 after assembly can be achieved.

[0025] The principle of the adopted cantilever structure is as follows: The sealing and fixing fixture 2 preferably adopts two groups of elastic arms 22, and the outer diameter of the sealing and fixing fixture 2 is larger than the opening diameter of the tail of the gun shell of the charging gun 1. When the sealing and fixing fixture 2 is inserted into the gun shell from the tail, the sealing and fixing fixture 2 itself has a guiding inclined surface 211 and a screw hole 212 positioning structure, and relying on the deformation of its own elastic arm 22, it will be forced to squeeze inward, so that it can be inserted into the gun shell and have an interference fit with the cable body 3 at the tail to play a role in fixing the cable. It can be understood that the present invention designs an inclined surface (guiding inclined surface 211), which allows the elastic arm to interact with the central member in a controlled manner during the assembly process. When the elastic arm 22 applies pressure, the sealing and fixing fixture 2 smoothly moves along the surface of the guiding inclined surface 211, naturally guiding the sealing and fixing fixture 2 into the predetermined fixing position, thereby improving the overall fixing stability and operation convenience.

[0026] As Figure 4 shown, in an embodiment of the present invention, a DC terminal 4 is fixedly installed inside the charging gun 1, and the DC terminal 4 is adaptively connected to the cable body 3 through a DC sealing assembly 5.

[0027] Based on the above technical concept, the DC sealing component 5 includes a double-pass nut 51, a double-pass member 52, a cable sealing ring 53, a cable washer 54, and a DC terminal sealing ring 55 that are arranged axially along the cable body 3 in sequence. During specific implementation, the double-pass nut 51 fastens the double-pass member 52, and after the cable sealing ring 53 and the cable washer 54 are sleeved on the outer edge surface of the cable body 3 in sequence, the DC terminal 4 is connected; the DC terminal sealing ring 55 is fixed at the connection of the DC terminal 4.

[0028] As Figure 5 , Figure 6A , Figure 6B , Figure 7 shown, due to the problem in the prior art that the circular sealing ring has inconsistent dimensions after the DC terminal is pressed, resulting in interference with the inner wall of the double-pass, reducing the preload of the sealing ring and causing leakage; at the same time, the hollow structure of the cable is deformed under pressure, and the existing surface contact sealing method cannot effectively prevent leakage. The present utility model further proposes to add a plurality of annular protrusions 531 adapted to the outer diameter of the cable body 3 on the outer edge surface of the cable sealing ring 53. Each annular protrusion 531 is tightly combined with the cable body 3 through preloading to form a sealing barrier along the length direction of the cable body 3, so as to increase the preloading area and effectively prevent water. It is also set that the diameters of the cable washer 54 and the DC terminal sealing ring 55 are smaller than the inner diameter of the double-pass member 52 and larger than the outer diameter of the cable body 3, so as to ensure that when the cable body 3 passes through the double-pass member 52, the DC terminal sealing ring 55 plays a sealing role at the connection between the double-pass member 52 and the DC terminal, preventing the medium from leaking through the gap between the cable body 3 and the double-pass member 52 and improving the sealing effect.

[0029] Based on the above technical concept, it can be understood that by improving the DC terminal 4 and the cable sealing structure, the design of the inner diameter of the double-pass can be enlarged to ensure that there is no interference between the DC terminal 4 and the inner wall of the double-pass after pressing; and by changing the DC terminal sealing ring 55 to an annular washer structure, the diameter of the DC terminal sealing ring is enlarged, increasing the preloading area to achieve effective waterproofing; by modifying the structure of the cable sealing ring 53 and adding multiple annular protrusions 531 inside and outside it, the deformation of the hollow part of the cable can be dealt with through preloading.

[0030] In an embodiment of the present utility model, the proposed sealing and fixing structure further includes a screw 7, a charging gun end plug 8, and a sealing silicone 9 that are sequentially arranged along the axial direction of the cable body 3. During specific implementation, the double-pass nut 51 is tightly screwed onto the end of the double-pass member 52, and a channel adapted to the cable body 3 is designed inside the member. Among them, the DC terminal sealing ring 55 surrounds the DC terminal 4 to ensure sealing performance, while the cable washer 54 is located between the cable body 3 and the DC terminal 4 to provide necessary support and protection. The cable sealing ring 53 is installed on the outside of the cable and cooperates with the other end of the double-pass member 52 to jointly form the sealing and fixing of the cable, ensuring the stability and sealing performance of the entire connection system. The screw 7 sequentially passes through the charging gun end plug 8, the sealing silicone 9, and the screw hole 212, and finally is threadedly connected to the external charging gun housing to achieve fastening, ensuring that the components along the axial direction of the cable body are stably assembled inside the charging gun housing.

[0031] As an embodiment of the present utility model, the above design of expanding the inner diameter of the double-pass is to ensure that during the pressing process of the DC terminal 4, even if a certain degree of deformation occurs, it will not come into contact with or interfere with the inner wall of the double-pass member 52. However, when specifically designing the double-pass member 52, it is necessary to pre-consider the possible maximum deformation amount of the DC terminal 4 after pressing, so as to leave enough space in the inner diameter design of the double-pass member 52 to avoid contact between the DC terminal 4 and the inner wall.

[0032] Furthermore, to improve the sealing performance between the cable body 3 and the sealing and fixing fixture 2 and prevent moisture or other substances from invading, therefore, after the baffle 6 is assembled, an additional sealing ring can be sleeved and installed between the sealing and fixing fixture 2 and the baffle 6.

[0033] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A liquid-cooled cable sealing and fixing structure for a high-power charging gun, characterized in that including a sealing and fixing fixture and a cable body, wherein the sealing and fixing fixture includes a central member and elastic arms. The central member connects the elastic arms end to end to form a closed structure for accommodating the cable body, which is sleeved on the outer edge surface of the cable body; a guiding inclined surface is axially provided on the outer edge surface of the central member, so that the cross-section of the central member becomes wider from narrow along the direction of the guiding inclined surface.

2. The sealing and fixing structure according to claim 1, wherein a DC terminal is fixedly arranged inside the charging gun, and the DC terminal is connected to the cable body through a DC sealing assembly; the guiding inclined surface abuts against and is embedded in the connection part between the charging gun and the cable body to realize the fixation and sealing of the cable body, and screw holes for positioning are arranged at the edge of the guiding inclined surface.

3. The sealing and fixing structure according to claim 2, wherein the DC sealing assembly includes a double-pass nut, a double-pass member, a cable sealing ring, a cable washer and a DC terminal sealing ring which are sequentially arranged along the axial direction of the cable body. Among them, the double-pass nut fastens the double-pass member, and after being sequentially sleeved on the outer edge surface of the cable body with the cable sealing ring and the cable washer, it connects the DC terminal; the DC terminal sealing ring is fixedly arranged at the connection part of the DC terminal.

4. The sealing and fixing structure according to claim 3, wherein a plurality of annular protrusions adapted to the outer diameter of the cable body are added to the outer edge surface of the cable sealing ring. Each annular protrusion is tightly combined with the cable body through preloading to form a sealing barrier along the length direction of the cable body, so as to increase the preloading area and effectively prevent water.

5. The sealing and fixing structure according to claim 3, wherein the diameters of the cable washer and the DC terminal sealing ring are smaller than the inner diameter of the double-pass member and larger than the outer diameter of the cable body, so as to improve the sealing effect.

6. The sealing and fixing structure according to claim 1 or 2, wherein a retaining piece is arranged at the connection part between the charging gun and the cable body. The retaining piece is sleeved on the outer edge surface of the cable body and is used to provide additional support and fixation between the sealing and fixing fixture and the cable body to prevent the sealing and fixing fixture from moving inside the charging gun.

7. The sealing and fixing structure according to claim 1, wherein it further includes a screw, a charging gun tail plug and a sealing silica gel which are sequentially arranged along the axial direction of the cable body. Among them, the screw sequentially passes through the charging gun tail plug, the sealing silica gel and the screw hole, and finally is threadedly connected to the charging gun shell to realize fastening, so as to ensure that the components along the axial direction of the cable body are stably assembled inside the charging gun shell.

8. The sealing and fixing structure according to claim 1, wherein the sealing and fixing fixture is connected to the charging gun by an interference fit method to ensure the stability and sealing of the cable body at its connection part.

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