Multi-layer sealing structure of charging gun plug

Abstract

The utility model discloses a multilayer sealing structure of a charging gun plug, which comprises a charging gun plug, a plug fixing plate, a charging gun shell and a plurality of sealing rings, the charging gun plug and the plug fixing plate are arranged in the charging gun shell through sealing screws, and the sealing rings are arranged outside the charging gun plug and the plug fixing plate in a limiting manner; the sealing ring comprises a sealing part with lips inside and outside and a positioning part connected with the sealing part, the sealing part is in interference fit with the charging gun plug and the plug fixing plate, and the positioning part realizes circumferential positioning of the sealing part. According to the utility model, by arranging the sealing rings with special structures on the charging gun plug and the plug fixing plate and adopting the sealing screws with O-shaped rings, double and multidirectional sealing of the plug is realized, the sealing effect is enhanced, lips are arranged inside and outside the sealing rings, and the positioning part is additionally arranged, so that the sealing performance after compression is ensured, the mounting position of the sealing rings is limited, and the sealing effect is improved. Therefore, multiple sealing effects are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle charging, in particular to a multi-layer sealing structure of a charging gun plug. Background Art

[0002] With the popularization of new energy vehicles, charging guns are also widely used in various environments. When using charging guns outdoors, they are easily affected by environmental factors. If rain or other liquids enter the charging gun, it will damage the internal components and reduce the service life of the charging gun. In severe cases, it will cause short circuit and leakage accidents, affecting life safety.

[0003] The charging gun mainly consists of components such as a plug and a gun shell. There is a sealing structure at the junction of the plug and the gun shell. Currently, the charging gun is mainly sealed with a single-layer sealing ring, which cannot achieve the best sealing effect. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-layer sealing structure for a charging gun plug, which is used to solve the technical problem that the charging gun plug in the prior art adopts a single-layer sealing ring for sealing and cannot ensure the sealing effect.

[0005] The utility model solves the above problems through the following technical solutions:

[0006] A multi-layer sealing structure of a charging gun plug, comprising: a charging gun plug, a plug fixing plate, a charging gun housing and a plurality of sealing rings, wherein the charging gun plug and the plug fixing plate are arranged in the charging gun housing by sealing screws, and sealing rings are provided outside the charging gun plug and the plug fixing plate to limit the position; the sealing ring comprises a sealing portion with lips inside and outside, and a positioning portion connected to the sealing portion, the sealing portion is interference fit with the charging gun plug and the plug fixing plate, and the positioning portion realizes the circumferential positioning of the sealing portion.

[0007] As a further improvement of the present invention, the charging gun plug is provided with a plurality of first screw through holes, through which the sealing screw is connected to the plug fixing plate; the plug fixing plate is provided with a plurality of second screw through holes, through which the sealing screw is connected to the charging gun housing.

[0008] As a further improvement of the present invention, the sealing screw comprises an integrally formed sealing end and a screw portion, and the sealing end is a groove structure for arranging an O-ring.

[0009] As a further improvement of the present invention, terminals are inserted into the charging gun plug and the plug fixing plate, and an O-ring for sealing is provided on the terminal jacket.

[0010] As a further improvement of the present invention, the charging gun plug and the plug fixing plate are circumferentially formed with a groove for arranging a sealing ring, and the groove is formed with a positioning hole that is matched and installed with the positioning part.

[0011] As a further improvement of the utility model, the sealing ring is made of silicone rubber or EPDM rubber.

[0012] As a further improvement of the present invention, the radial compression rate of the sealing ring and the charging gun housing is 13%-25%, and the filling rate is less than 100%.

[0013] As a further improvement of the present invention, there are two sealing rings, which are respectively arranged on the charging gun plug and the plug fixing plate, and the positioning parts of the two sealing rings are arranged opposite to each other.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] The utility model realizes double and multi-directional sealing of the plug by arranging a sealing ring of a special structure on the charging gun plug and the plug fixing plate and adopts a sealing screw with an O-ring, thereby enhancing the sealing effect.

[0016] Lips are arranged inside and outside the sealing ring, and a positioning portion is added to ensure the sealing after compression while limiting the installation position of the sealing ring, thereby ensuring multiple sealing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall exploded view of a multi-layer sealing structure of a charging gun plug of the utility model;

[0018] Figure 2 This is a cross-sectional view of a multi-layer sealing structure of a charging gun plug of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the sealing ring of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the charging gun plug of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the plug fixing plate of the utility model.

[0022] Reference numerals:

[0023] 1. Charging gun plug; 11. Groove; 12. First screw hole; 13. Positioning hole; 14. Terminal hole; 2. Plug fixing plate; 21. Second screw hole; 3. Charging gun housing; 4. Sealing screw; 41. Sealing end; 42. Screw part; 5. Sealing ring; 51. Positioning part; 52. Sealing part; 6. Terminal. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] Combined with Figure 1-5 As shown, a multi-layer sealing structure of a charging gun plug includes: a charging gun plug 1, a plug fixing plate 2, a charging gun housing 3 and a plurality of sealing rings 5, etc. The charging gun plug 1 and the plug fixing plate 2 are arranged in the charging gun housing 3 through sealing screws 4, and sealing rings are limitedly arranged outside the charging gun plug 1 and the plug fixing plate 2; the sealing ring includes a sealing portion 52 with lips inside and outside, and a positioning portion 51 connected to the sealing portion, the sealing portion is interference fit with the charging gun plug 1 and the plug fixing plate 2, and the positioning portion realizes the circumferential positioning of the sealing portion.

[0027] Specifically, the charging gun plug 1 is provided with a plurality of first screw through holes 12, through which the sealing screw is connected to the plug fixing plate; the plug fixing plate 2 is provided with a plurality of second screw through holes 21, through which the sealing screw is connected to the charging gun housing 3. In this embodiment, there are five first screw through holes 12 and five second screw through holes 21, respectively, and they are evenly distributed. The sealing screw includes an integrally formed sealing end 41 and a screw portion 42, and the sealing portion 41 is a groove structure for setting an O-ring, so as to achieve sealing between the plug fixing plate and the charging gun plug and the charging gun housing through the sealing screw, and the plug fixing plate is set between the charging gun plug and the charging gun housing.

[0028] Terminals are also inserted into the charging gun plug 1 and the plug fixing plate 2, and the terminal jacket is provided with an O-ring for sealing. The terminal is radially sealed with the charging gun plug and the fixing plate respectively through the O-ring. The charging gun plug 1 and the plug fixing plate 2 are circumferentially formed with a groove 11 for setting a sealing ring, and the groove is formed with a positioning hole 13 that matches and is installed with the positioning part 51. During the installation process, the sealing part is arranged in the groove of the charging gun plug and the plug fixing plate, and the positioning part is arranged in the positioning hole, so as to cooperate with the positioning hole through the positioning part to realize the circumferential positioning of the sealing ring. In this embodiment, two sealing rings are provided, which are respectively provided on the charging gun plug and the plug fixing plate, and the positioning parts of the two sealing rings are arranged relative to each other.

[0029] During installation, the plug fixing plate 2 is placed on the charging gun housing 3, and the sealing screw 4 is fixed through the five second screw holes 21 set on the plug fixing plate. The terminal 6 is provided with a groove to install the O-ring, which is inserted into the terminal hole 14 of the charging gun plug. The charging gun plug 1 is installed on the plug fixing plate 2, and the sealing screw 4 is fixed through the five first screw holes 12 set on the charging plug. The end faces of the first screw hole 12, the second screw hole 21, and the terminal hole 14 are all designed with chamfers to facilitate the installation of the O-ring and avoid damage to the O-ring during assembly. The sealing screws are evenly distributed to ensure the strength and reliability of the fixation. The charging gun plug 1 and the plug fixing plate 2 are respectively designed with grooves 11 perpendicular to the bottom surface to install the sealing ring 5. The positioning part 51 of the sealing ring is matched with the positioning hole 13 to constrain the position of the sealing ring 5. The inner diameter of the sealing ring 5 is smaller than the inner diameter of the groove for installing the sealing ring. It can be naturally fixed in the groove 11 by pre-stretching without bundling or adhesive. The sealing ring 5 is designed with lips both inside and outside, which compress and radially seal with the inner side surface of the charging gun housing 3.

[0030] Further technical solutions, the material of the sealing ring 5 is not limited, silicone rubber, EPDM rubber, etc. can be used, preferably silicone rubber. The radial compression rate with the charging gun housing is 13%-25%, and the filling rate is less than 100%, ensuring that it will not be squeezed out after installation, affecting the service life; the single-layer sealing effect meets IP67, and the double-layer sealing is strengthened and more reliable. The charging gun housing 3 is designed with high-strength plastic, and the deformation after long-term use is small, ensuring the sealing effect with the sealing ring 5.

[0031] The utility model realizes double and multi-directional sealing of the plug by setting the sealing ring on the charging gun plug and the plug fixing plate and adopting the sealing screw with O-ring, thereby enhancing the sealing effect. Lips are set inside and outside the sealing ring, and a positioning part is added to ensure the sealing after compression while limiting the installation position of the sealing ring, so that the multiple sealing effects are guaranteed.

[0032] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A multi-layer sealing structure of a charging gun plug, characterized in that: include: A charging gun plug, a plug fixing plate, a charging gun housing and several sealing rings. The charging gun plug and the plug fixing plate are arranged in the charging gun housing through sealing screws, and sealing rings are limitedly arranged outside the charging gun plug and the plug fixing plate; the sealing ring includes a sealing part with lips inside and outside, and a positioning part connected to the sealing part. The sealing part is interference fit with the charging gun plug and the plug fixing plate, and the positioning part realizes the circumferential positioning of the sealing part.

2. According to claim 1, a multi-layer sealing structure of a charging gun plug is characterized in that: The charging gun plug is provided with a plurality of first screw through holes, through which the sealing screw is connected to the plug fixing plate; the plug fixing plate is provided with a plurality of second screw through holes, through which the sealing screw is connected to the charging gun housing.

3. According to the multi-layer sealing structure of the charging gun plug according to claim 1, it is characterized in that: The sealing screw comprises an integrally formed sealing end and a screw portion, and an O-ring is disposed on the outer sleeve of the sealing end.

4. According to claim 1, a multi-layer sealing structure of a charging gun plug is characterized in that: Terminals are also inserted into the charging gun plug and the plug fixing plate, and an O-ring for sealing is provided on the terminal outer sleeve.

5. The multi-layer sealing structure of a charging gun plug according to claim 1, characterized in that: The charging gun plug and the plug fixing plate are circumferentially formed with a groove for arranging a sealing ring, and the groove is formed with a positioning hole matched with the positioning part.

6. According to claim 1, a multi-layer sealing structure of a charging gun plug is characterized in that: The sealing ring is made of silicone rubber or EPDM rubber.

7. The multi-layer sealing structure of a charging gun plug according to claim 6, characterized in that: The radial compression rate of the sealing ring and the charging gun housing is 13%-25%, and the filling rate is less than 100%.

8. A multi-layer sealing structure of a charging gun plug according to any one of claims 1 to 7, characterized in that: The sealing rings are provided in two numbers, which are respectively arranged on the charging gun plug and the plug fixing plate, and the positioning parts of the two sealing rings are arranged opposite to each other.

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