Charging gun capable of preventing pulling damage

Abstract

The charging gun comprises a charging gun body electrically connected with a charging pile through a cable, the charging gun body is composed of a gun head and a gun handle, the cable penetrates through the gun handle to be connected with the gun head, and an anti-pulling structure for preventing the connecting position of the cable and the gun head from falling off through shape limiting is arranged in the gun handle. According to the utility model, the risk that the connection part of the cable and the gun head falls off due to external force pulling can be effectively avoided, charging interruption or electric shock accidents and charging gun damage are avoided, and normal use of the charging gun is ensured.

Description

A charging gun designed to prevent damage from pulling. Technical Field

[0001] This utility model relates to the field of charging gun technology, specifically to a charging gun that is resistant to pulling damage. Background Technology

[0002] New energy buses primarily use charging guns to charge their batteries to power the buses. Generally, the charging guns are connected to the charging stations via charging cables. When not in use, the charging cables are wrapped or coiled on the charging stations for easy access by the driver.

[0003] When a bus is charging, the driver needs to remove the charging gun and pull it to the vicinity of the vehicle, inserting the charging head of the charging gun into the charging port on the bus. During the process of pulling the charging gun, the cable may be pulled. At the same time, during the charging process, the driver may accidentally trip over the charging gun cable, causing it to be pulled, which may cause the connection between the cable and the inside of the charging gun to come loose. This could easily lead to charging interruption, electric shock, or even damage to the charging gun, affecting normal charging. Summary of the Invention

[0004] The purpose of this utility model is to provide a charging gun that is resistant to pulling damage, which can effectively avoid the risk of the cable and the gun head connection falling off due to external pulling, avoid charging interruption or electric shock accidents and damage to the charging gun, and ensure the normal use of the charging gun.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A charging gun designed to prevent damage from pulling includes a charging gun body electrically connected to a charging station via a cable. The charging gun body consists of a gun head and a gun handle. The cable passes through the gun handle and connects to the gun head. The gun handle is provided with an anti-pulling structure that uses shape-limiting mechanisms to prevent the cable from detaching from the connection point with the gun head.

[0007] In this solution, the anti-pull structure with shape limiting function inside the gun handle directly resists external pulling force. The shape limiting structure reduces the risk of the cable separating from the gun head connection due to external pulling force by physical isolation, avoiding charging interruption or electric shock accidents and damage to the charging gun.

[0008] Optionally, the anti-pull structure is a serpentine cavity that allows the cable to pass through. The serpentine cavity is a section located inside the gun handle and is distributed along the axis of the gun handle. One end of the cable passes through the serpentine cavity and is electrically connected to the gun head.

[0009] Optionally, the gun handle consists of two symmetrical handles, with grooves on the opposite surfaces of the two handles that are adapted to the shape of the cable. When the two handles are closed, the two grooves form a serpentine cavity.

[0010] Optionally, a straight groove is provided at both ends of the groove.

[0011] Optionally, the anti-pull structure is a conical limiting block, and the lower end of the gun handle is provided with a conical cavity to accommodate the limiting block. The limiting block is located in the conical cavity and is fixedly connected to the cable. The cable has a certain amount of movement in the charging gun.

[0012] Optionally, one end of the cable passes through the middle of the limiting block and is electrically connected to the gun head.

[0013] Optionally, the limiting block is made of rubber, with the upper end being larger than the lower end.

[0014] Optionally, the upper end of the conical cavity is provided with a baffle, one end of the cable passes through the baffle and is electrically connected to the gun head, and the other end passes through the lower end of the conical cavity and is electrically connected to the charging pile.

[0015] Optionally, the baffle is connected to the inner wall of the gun handle, and the baffle is provided with a through hole that allows the cable to pass through. The lower end of the conical cavity has an opening, the size of which is smaller than the size of the lower end of the limiting block.

[0016] The beneficial effects of this utility model are:

[0017] In existing charging guns, when the cable is pulled by external force, the internal cable may easily detach from the electrical connection between the cable and the gun head, potentially leading to charging interruption, electric shock, or damage to the charging gun, resulting in a poor user experience. This solution uses an anti-pull structure with shape-limiting function inside the handle to directly resist external pulling. The shape-limiting structure reduces the risk of the cable separating from the gun head connection due to external pulling through physical barriers, thus avoiding charging interruption, electric shock, and damage to the charging gun, and improving the user experience. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of this utility model;

[0019] Figure 2 is a schematic diagram of the distribution structure of the grooves on the handle;

[0020] Figure 3 is a magnified view of part A in Figure 1;

[0021] Figure 4 is a structural schematic diagram of Example 2.

[0022] Reference numerals: 1-gun handle, 101-handle, 2-gun head, 3-cable, 4-serpentine cavity, 401-groove, 402-straight groove, 5-limiting block, 6-conical cavity, 7-baffle. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] A charging gun designed to prevent damage from pulling includes a charging gun body electrically connected to a charging station via a cable 3. The charging gun body consists of a gun head 2 and a gun handle 1. The cable 3 passes through the gun handle 1 and connects to the gun head 2. The gun handle 1 has an anti-pulling structure inside that prevents the cable 3 from falling off at the connection point with the gun head 2 by means of shape limiting.

[0028] In this embodiment, as shown in Figure 1, the charging head 2 is connected to the front end of the handle 1 and is connected to the charging port of the bus. The cable 3 passes through the handle 1 and is electrically connected to the charging head 2. During the pulling of the charging gun and during the charging process, the connection between the cable 3 and the charging head 2 may detach due to external pulling. This solution uses an anti-pull structure with shape limiting function inside the handle 1 to directly resist external pulling. The shape limiting structure reduces the risk of the cable 3 separating from the connection between the cable 3 and the charging head 2 due to external pulling through physical barriers, thus avoiding charging interruption, electric shock accidents, and damage to the charging gun.

[0029] Furthermore, the anti-pull structure is a serpentine cavity 4 that allows the cable 3 to pass through. The serpentine cavity 4 is a section and is located inside the gun handle 1. The serpentine cavity 4 is distributed along the axis of the gun handle 1. One end of the cable 3 passes through the serpentine cavity 4 and is electrically connected to the gun head 2.

[0030] Specifically, as shown in Figure 3, cable 3 forms multiple "S"-shaped bends within the serpentine cavity 4. When an external force pulls along the axial direction, cable 3 must first overcome the friction and deformation resistance at each bend point, thus extending the actual effective pulling distance. The pulling force is attenuated multiple times along the cavity path, significantly reducing the instantaneous stress peak at the connection between cable 3 and the charging head 2, preventing the connection between cable 3 and the charging head 2 from detaching and causing charging interruption or electric shock. After multiple bends within the serpentine cavity 4, the contact area between cable 3 and the cavity wall increases, significantly enhancing friction. When cable 3 is stretched, the friction at the bend point and the deformation recovery force of cable 3 form a self-locking effect. Even without additional fixing structures at the connection point, it can still resist significant pulling force, effectively preventing damage to the charging gun.

[0031] Furthermore, the gun handle 1 is composed of two symmetrical handles 101. The opposing surfaces of the two handles 101 are provided with grooves 401 that are adapted to the shape of the cable 3. When the two handles 101 are closed, the two grooves 401 form a serpentine cavity 4.

[0032] Specifically, as shown in Figure 2, the two handles 101 are independently injection molded. The groove 401 structure can be injection molded simultaneously with the handles 101, eliminating the need for secondary processing or complex mold design. Compared to the one-piece serpentine cavity 4 solution, mold costs are reduced. The split structure allows for the use of different material combinations (e.g., ABS for the handles 101 and wear-resistant POM for the grooves 401). The grooves 401 of the two handles 101 adopt a mirror symmetrical design. During assembly, the cable 3 only needs to be placed in either groove 401, and the complete serpentine cavity 4 will be automatically formed after alignment, shortening the assembly time. The two handles 101 are fixed together by screws (not shown in the figure). Users can separate the gun handle 1 by loosening the fixing screws on the handles 101 (e.g., two M3 Phillips head screws) and directly remove the cable 3 for replacement without cutting the cable 3 or damaging the structure of the gun handle 1. Compared to the traditional solution, the cable 3 replacement time is shortened.

[0033] Furthermore, a straight groove 402 is provided at both ends of the groove 401.

[0034] Example 2

[0035] Furthermore, the anti-pull structure is a conical limiting block 5. The lower end of the gun handle 1 is provided with a conical cavity 6 to accommodate the limiting block 5. The limiting block 5 is located in the conical cavity 6. The limiting block 5 is fixedly connected to the cable 3. The cable 3 has a certain amount of movement in the charging gun.

[0036] Specifically, as shown in Figure 4, the conical limiting block 5 and the inclined surface of the conical cavity 6 form a mechanical wedge structure. When the cable 3 is pulled, the limiting block 5 generates axial and radial dual forces within the conical cavity 6. The radial force causes the contact pressure between the limiting block 5 and the cavity wall to increase linearly with the pulling force, achieving the effect of "the greater the pulling force, the tighter the self-locking." The cable 3 has a reserved axial movement allowance within the charging gun, preventing it from being in a pre-tightened state for extended periods. When the cable 3 is pulled by an external force, the conical interlocking structure is triggered, preventing the connection between the cable 3 at the upper end of the limiting block 5 and the gun head 2 from detaching. In practical applications, the handle 1 can still be configured as two symmetrical halves, which facilitates the installation of the limiting block 5.

[0037] Furthermore, one end of the cable 3 passes through the middle of the limiting block 5 and is electrically connected to the gun head 2.

[0038] Furthermore, the limiting block 5 is made of rubber, with the upper end being larger than the lower end.

[0039] Specifically, the tapered design, wider at the top and narrower at the bottom, generates a wedge-shaped compression effect under tension, causing the rubber limiting block 5 to expand radially. The friction between the rubber limiting block 5 and the cavity wall increases exponentially with the increase of tension, achieving dynamic self-locking that "gets tighter the more it's pulled." The rubber limiting block 5 can also generate elastic compression to absorb instantaneous impacts during pulling.

[0040] Furthermore, the upper end of the conical cavity 6 is provided with a baffle 7, one end of the cable 3 passes through the baffle 7 and is electrically connected to the gun head 2, and the other end passes through the lower end of the conical cavity 6 and is electrically connected to the charging pile.

[0041] Specifically, the conical cavity 6 is located inside the lower end of the gun handle 1. The baffle 7 encloses the limiting block 5 inside the conical cavity 6. Since the cable 3 above the limiting block 5 has a certain axial movement margin, the limiting block 5 also has a certain movement margin inside the conical cavity 6. When the limiting block 5 is subjected to pulling force, it locks itself with the conical cavity 6, so that the cable 3 above the limiting block 5 no longer moves. This makes it difficult for the cable 3 to fall off at the connection with the gun head 2, avoiding charging interruption or electric shock accidents, and reducing the risk of damage to the charging gun.

[0042] Furthermore, the baffle 7 is connected to the inner wall of the gun handle 1, and the baffle 7 is provided with a through hole that allows the cable 3 to pass through. The lower end of the conical cavity 6 has an opening, the size of which is smaller than the size of the lower end of the limiting block 5.

[0043] Specifically, a through hole is opened in the middle of the baffle 7 for the cable 3 to pass through. There is a gap between the cable 3 and the through hole to prevent the cable 3 from getting stuck. The lower end of the conical cavity 6 is open, and the cable 3 at the lower end of the limiting block 5 passes through the opening. The opening size is larger than the diameter of the cable 3.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A charging gun resistant to pulling damage, comprising a charging gun body electrically connected to a charging station via a cable (3), the charging gun body being composed of a gun head (2) and a gun handle (1), the cable (3) passing through the gun handle (1) and connected to the gun head (2), characterized in that, The gun handle (1) is equipped with an anti-pull structure inside, which uses shape to limit the connection between the cable (3) and the gun head (2) to prevent it from falling off.

2. The charging gun for preventing damage from pulling according to claim 1, characterized in that, The anti-pull structure is a serpentine cavity (4) that allows the cable (3) to pass through. The serpentine cavity (4) is a section and is located inside the gun handle (1). The serpentine cavity (4) is distributed along the axis of the gun handle (1). One end of the cable (3) passes through the serpentine cavity (4) and is electrically connected to the gun head (2).

3. The anti-pull damage charging gun of claim 2, wherein, The gun handle (1) consists of two symmetrical handles (101). The opposite surfaces of the two handles (101) are provided with grooves (401) that are adapted to the shape of the cable (3). When the two handles (101) are closed, the two grooves (401) form a serpentine cavity (4).

4. The anti-pull damage charging gun of claim 3, wherein, The groove (401) has a straight groove (402) at both ends.

5. The anti-pull damage charging gun of claim 1, wherein, The anti-pull structure is a conical limiting block (5). The lower end of the gun handle (1) is provided with a conical cavity (6) to accommodate the limiting block (5). The limiting block (5) is located in the conical cavity (6). The limiting block (5) is fixedly connected to the cable (3). The cable (3) has a certain amount of movement in the charging gun.

6. The anti-pull damage charging gun of claim 5, wherein, One end of the cable (3) passes through the middle of the limiting block (5) and is electrically connected to the gun head (2).

7. A charging gun resistant to pulling damage according to claim 6, characterized in that, The limiting block (5) is made of rubber, with the upper end of the limiting block (5) being larger than the lower end.

8. The anti-pull damage charging gun of claim 5, wherein, The upper end of the conical cavity (6) is provided with a baffle (7). One end of the cable (3) passes through the baffle (7) and is electrically connected to the gun head (2), and the other end passes through the lower end of the conical cavity (6) and is electrically connected to the charging pile.

9. The pull-damage-preventing charging gun according to claim 8, characterized in that, The baffle (7) is connected to the inner wall of the gun handle (1). The baffle (7) has a through hole that allows the cable (3) to pass through. The lower end of the conical cavity (6) has an opening, the size of which is smaller than the size of the lower end of the limiting block (5).

Images