Deflector for main cover unit, main cover unit and capless refueling device

Abstract

The present invention relates to the technical field of automobile refueling devices, and in particular to a deflector for a main cover unit, a main cover unit and a capless refueling device. The deflector comprises a deflector shell and an elastic positioning structure, wherein the deflector shell is inserted in a refueling pipe, and the deflector shell is provided with a deflector channel, the deflector channel is used for inserting a refueling gun and guiding oil; the elastic positioning structure is arranged on the outer wall of the deflector shell, and the elastic positioning structure is used to abut against the refueling pipe to limit the relative installation position of the deflector shell and the refueling pipe; wherein the elastic positioning structure can follow the movement of the deflector shell, and can adaptively adjust its relative angle with the outer wall of the deflector shell, which can reduce the difficulty and complexity in the installation process of the deflector and the refueling pipe, making the installation more simple and efficient, and in some cases, it is adapted to a variety of size types of refueling pipes, thereby increasing the versatility of the deflector.

Description

Technical Field

[0001] The invention relates to the technical field of automobile refueling devices, and in particular to a deflector for a main cover unit, the main cover unit and a capless refueling device. Background Art

[0002] At present, a refueling device is usually installed on the refueling pipe of the automobile fuel tank to close the refueling port. When refueling, the refueling gun is inserted into the refueling pipe along the refueling device to refuel the fuel tank. Therefore, the refueling device is an indispensable component in the automobile fuel system.

[0003] The deflector structure of the related art refueling device is installed in the refueling pipe to guide the oil to flow into the fuel tank. However, the deflector structure is usually only adapted to the refueling pipe with a single inner diameter, resulting in great limitations in its assembly. Summary of the invention

[0004] The present invention provides a deflector for a main cover unit, which is used to solve the problem that the deflector structure of a refueling device in the related art is installed in a refueling pipe to guide the oil to flow into a fuel tank. However, the deflector structure is usually only adapted to a refueling pipe with a single inner diameter, resulting in a great limitation in its assembly.

[0005] The present invention provides a deflector for a main cover unit, comprising:

[0006] A flow guide housing, the flow guide housing is inserted into the refueling pipe, the flow guide housing is provided with a flow guide channel, the flow guide channel is used for inserting the refueling gun and guiding the oil;

[0007] An elastic positioning structure is provided on the outer wall of the flow guide housing, and the elastic positioning structure is used to abut against the fuel filling pipe to limit the relative installation position of the flow guide housing and the fuel filling pipe;

[0008] The elastic positioning structure can follow the movement of the flow guide housing and can adaptively adjust the relative angle between the elastic positioning structure and the outer wall of the flow guide housing.

[0009] According to a flow guide shell for a main cover unit provided by the present invention, the elastic positioning structure includes an elastic positioning member, the elastic positioning member is arranged on the outer wall of the flow guide shell along a first direction, and there is a deformation distance between the elastic positioning member and the outer wall of the flow guide shell, and when the elastic positioning member is subjected to an external force, the elastic positioning member has a tendency to fit into the outer wall of the flow guide shell.

[0010] According to a deflector for a main cover unit provided by the present invention, the elastic positioning member comprises a connecting section and a positioning section, one end of the connecting section is connected to the outer wall of the deflector housing, and the other end of the connecting section opposite to the positioning section is connected to the positioning section;

[0011] The connecting section is arranged obliquely relative to the center line of the flow guide channel, and the positioning section is abutted against the inner wall of the fuel filler pipe to limit the relative installation positions of the flow guide housing and the fuel filler pipe.

[0012] According to a deflector for a main cover unit provided by the present invention, the elastic positioning member is an elastic plate body integrally formed with the deflector housing.

[0013] According to a deflector for a main cover unit provided by the present invention, there are two elastic positioning structures, and the two elastic positioning structures are arranged at intervals on the outer wall of the deflector housing.

[0014] According to a deflector for a main cover unit provided by the present invention, the deflector housing is provided with a notch, the notch is arranged on the side wall of the deflector housing along a first direction, and the notch extends to the end surface of the deflector housing corresponding to the outlet end of the deflector channel and is connected thereto;

[0015] When the side wall of the flow guide housing corresponding to the outlet end of the flow guide channel is subjected to external force, the side walls of the flow guide housing corresponding to the two opposite sides of the notch are moved closer to each other, thereby reducing the outer diameter of the side wall of the flow guide housing corresponding to the outlet end of the flow guide channel.

[0016] According to a deflector for a main cover unit provided by the present invention, two side walls of the deflector housing corresponding to the notch opposite to each other have a first wall thickness, a second wall thickness and a third wall thickness, the first wall thickness is adjacent to the side of the notch, the second wall thickness is located between the first wall thickness and the third wall thickness, and the thicknesses of the first wall thickness and the third wall thickness are both smaller than the second wall thickness, the thickness of the first wall thickness gradually increases toward the second wall thickness, and the third wall thickness gradually decreases away from the second wall thickness;

[0017] When an external force acts on the side wall of the flow guide housing corresponding to the second wall thickness, the outer diameter of the side wall of the flow guide housing corresponding to the outlet end of the flow guide channel is reduced.

[0018] According to a deflector for a main cover unit provided by the present invention, the deflector shell is provided with a deflector gas concave edge, the deflector gas concave edge passes through the inside and outside of the deflector channel, and the deflector gas concave edge is connected to the notch to allow gas to circulate inside and outside the deflector shell.

[0019] The present invention also provides a main cover unit, comprising:

[0020] The deflector for the main cover unit as described above;

[0021] A main cover shell is connected to the flow guide shell, and the main cover shell is provided with a main cover channel, and the main cover channel is communicated with the flow guide channel.

[0022] The present invention also provides a capless refueling device, comprising:

[0023] The main cover unit mentioned above;

[0024] A secondary gate unit, the main cover unit is fixedly matched with the secondary gate unit, the secondary gate unit is provided with a secondary gate chamber, and the secondary gate chamber is docked with and communicated with the main cover channel.

[0025] The deflector for the main cover unit provided by the present invention, when installed, installs the deflector shell on the fuel filler pipe, and limits the final installation position of the deflector shell through the elastic deformation and resetting of the elastic positioning structure, which can reduce the difficulty and complexity of the installation process of the deflector and the fuel filler pipe, making the installation easier and more efficient. In some cases, for example, due to the elasticity of the elastic positioning structure, a small-diameter fuel filler pipe can also achieve an expanded diameter shape, adapting to a variety of size types of fuel filler pipes, thereby increasing the versatility of the deflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic structural diagram of the deflector provided by the present invention from a first perspective;

[0028] Figure 2 is a schematic structural diagram of the deflector provided by the present invention from a second viewing angle;

[0029] Figure 3 It is a cross-sectional schematic diagram of the deflector provided by the present invention.

[0030] Figure 4 It is a structural schematic diagram of the refueling device provided by the present invention;

[0031] Figure 5 is a cross-sectional schematic diagram of a refueling device provided by the present invention;

[0032] Figure 6 is a structural schematic diagram of a main cover unit provided by the present invention;

[0033] Figure 7 is an exploded schematic diagram of the main cover unit provided by the present invention;

[0034] Figure 8 is an exploded schematic diagram of the valve structure provided by the present invention;

[0035] Fig. 9 is a cross-sectional schematic diagram of a valve structure provided by the present invention;

[0036] Fig.10 It is a structural schematic diagram of the main cover shell provided by the present invention;

[0037] Fig.11 is an exploded schematic diagram of the auxiliary gate unit provided by the present invention;

[0038] Fig.12 It is a structural schematic diagram of the gate structure provided by the present invention;

[0039] Fig.13 It is a first perspective exploded schematic diagram of the gate structure provided by the present invention;

[0040] Fig.14 is a second perspective exploded schematic diagram of the gate structure provided by the present invention;

[0041] Fig.15 It is a structural schematic diagram of the fueling gun guide rail provided by the present invention;

[0042] Fig.16 is a cross-sectional schematic diagram of a fueling gun guide rail provided by the present invention;

[0043] Fig.17 yes Fig.16 A schematic diagram of the structure enlargement in the middle;

[0044] Fig.18 It is a structural schematic diagram of the auxiliary gate housing provided by the present invention.

[0045] Reference numerals:

[0046] 100, auxiliary gate housing; 110, auxiliary gate chamber; 120, drain port; 130, positioning groove; 140, first matching portion; 150, second matching portion; 160, fixing structure; 170, water guide structure; 171, guide slope; 180, buckle structure; 190, guide slope;

[0047] 200, gate structure; 210, gate bracket; 211, first mounting groove; 212, first protrusion; 213, first positioning channel; 214, first positioning groove; 215, gate channel; 216, avoidance slope; 217, guide protrusion; 218, positioning concave surface; 2191, plug-in protrusion; 2192, first positioning portion; 2193, elastic fixing member; 21931, elastic fixing protrusion; 220, gate member; 221, first connecting arm; 222, second positioning groove; 223, push-pushing boss; 2231, push-pushing concave position; 230, gate reset member; 231, spiral rod segment; 232, driving rod segment;

[0048] 300, fuel gun guide rail; 310, drainage channel; 321, fixing channel; 322, second mounting groove; 3221, second protrusion; 323, plug-in groove; 330, second positioning portion; 340, guide channel; 341, guide curved surface; 3411, first arc segment; 3412, second arc segment; 3413, guide segment; 350, elastic locking structure; 351, connecting portion; 352, bending portion;

[0049] 400, blocking mechanism; 410, elastic plate; 411, elastic blocking area; 412, folding plate; 420, rubber part; 421, abutting protrusion; 422, second connecting arm; 423, connecting channel; 424, guide channel; 510, first sealing ring; 520, second sealing ring; 530, main shaft; 540, main cover spring; 550, main cover sealing layer; 551, assembly section; 552, sealing section; 560, main cover sealing ring; 600, main cover housing; 610, main cover channel; 620, limiting boss; 630, first through port; 640, second through port; 650, stop structure; 661, first annular step; 662, second annular step; 663, third annular step; 670, connecting protrusion; 681, first plug-in recess; 682, first plug-in protrusion; 691, plug-in port; 692, avoidance port;

[0050] 700, flow guide housing; 710, flow guide channel; 711, first straight section; 712, inclined guide section; 713, second straight section; 720, guide structure; 721, guide arc surface; 730, limit structure; 731, limit step; 740, spoiler structure; 750, elastic positioning structure; 751, connecting section; 752, positioning section; 760, notch; 771, first wall thickness; 772, second wall thickness; 773, third wall thickness; 780, connecting groove; 791, second plug-in recess; 7911, limit boss; 792, second plug-in protrusion;

[0051] 810, lower cover; 811, lower chamber; 812, pressure inlet hole; 813, second plug-in boss; 814, assembly arm; 8141, assembly hole; 815, assembly groove; 816, support end face; 820, upper cover; 821, upper chamber; 8211, installation protrusion; 822, first plug-in boss; 823, assembly protrusion; 824, pushing concave surface; 825, limiting end face; 830, valve body assembly; 831, valve body; 8311, installation cavity; 832, valve body sealing layer; 8321, sealing body; 8322, installation column; 833, valve body reset member; 910, first gas circulation port; 920, second gas circulation port. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0053] Combine the following Figure 1-Figure 18 The deflector for the main cover unit, the main cover unit and the capless refueling device of the present invention are described. The capless refueling device comprises a secondary gate unit and a main cover unit, and the main cover unit comprises the deflector for the main cover unit and the main cover housing 600.

[0054] Reference Figures 1 to 3 According to the present invention, a deflector for a main cover unit is provided, comprising: a deflector housing 700, the deflector housing 700 is inserted into a fuel filling pipe, the deflector housing 700 is provided with a deflector channel 710, the deflector channel 710 is used for inserting a fuel filling gun and diverting oil; an elastic positioning structure 750, which is arranged on the outer wall of the deflector housing 700, and the elastic positioning structure 750 is used to abut against the fuel filling pipe to limit the relative installation position of the deflector housing 700 and the fuel filling pipe; wherein the elastic positioning structure 750 can follow the movement of the deflector housing 700, and can adaptively adjust its relative angle with the outer wall of the deflector housing 700.

[0055] The deflector for the main cover unit provided by the present invention, when installed, installs the deflector shell 700 on the fuel filler pipe, and limits the final installation position of the deflector shell 700 through the elastic deformation and resetting of the elastic positioning structure 750, which can reduce the difficulty and complexity of the installation process of the deflector and the fuel filler pipe, making the installation easier and more efficient. In some cases, for example, since the elastic positioning structure 750 is elastic, a small-diameter fuel filler pipe can also achieve an expanded diameter shape, which is suitable for a variety of fuel filler pipe size types, thereby increasing the versatility of the deflector.

[0056] It should be noted that the above-mentioned small-diameter fueling pipe can also realize an expanded diameter shape. It can be understood that the relevant fueling pipe is composed of two parts, a large diameter and a small diameter. The large diameter part and the small diameter part need to be welded and fixed, and the elastic positioning structure 750 is used for setting. Therefore, the small diameter part of the fueling pipe can be expanded to a size with a slope close to that of the large diameter part. Therefore, the large diameter part and the small diameter part after the expansion of the fueling pipe do not need to be welded, and can be processed and manufactured using a bobbin, thereby reducing the overall cost.

[0057] Specifically, refer to Figures 1 to 3 In an embodiment of the present invention, the elastic positioning structure 750 includes an elastic positioning member, which is arranged on the outer wall of the diversion housing 700 along a first direction, and there is a deformation distance between the elastic positioning member and the outer wall of the diversion housing 700. When the elastic positioning member is subjected to an external force, the elastic positioning member tends to fit into the outer wall of the diversion housing 700, which can ensure that the refueling pipe and the diversion housing 700 maintain a fixed position during installation, prevent accidental movement, and improve safety.

[0058] Specifically, in the embodiment of the present invention, the elastic positioning member includes a connecting section 751 and a positioning section 752, one end of the connecting section 751 is connected to the outer wall of the diversion housing 700, and the other end of the connecting section 751 is connected to the positioning section 752; wherein the connecting section 751 is inclined relative to the center line of the diversion channel 710, and the positioning section 752 is abutted against the inner wall of the refueling pipe to limit the relative installation position of the diversion housing 700 and the refueling pipe. Through the above arrangement, the combination of the connecting section 751 and the positioning section 752 reduces the complexity of the elastic positioning member and facilitates manufacturing. Specifically, in the embodiment of the present invention, the elastic positioning member is an elastic plate body integrally formed with the diversion housing 700, which simplifies the manufacturing and installation process, reduces the number of parts and assembly steps, and saves additional materials and manufacturing costs.

[0059] Specifically, in the embodiment of the present invention, the elastic positioning member is an elastic plate body integrally formed with the deflector housing 700, which simplifies the manufacturing and installation process, reduces the number of parts and assembly steps, and saves additional materials and manufacturing costs.

[0060] Specifically, in the embodiment of the present invention, there are two elastic positioning structures 750, which are spaced apart on the outer wall of the diversion housing 700, which helps to improve the installation stability of the refueling pipe and the diversion housing 700. Of course, the number of the elastic positioning structures 750 is not limited here, and can also be one, three, etc.

[0061] Specifically, refer to Figures 1 to 3In the embodiment of the present invention, the flow guide housing 700 is provided with a notch 760, which is arranged on the side wall of the flow guide housing 700 along the first direction, and the notch 760 extends to the end face of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710 and is connected; when the side wall of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710 is subjected to external force, the side walls of the flow guide housing 700 corresponding to the two opposite sides of the notch 760 are moved closer to each other, so as to reduce the outer diameter of the side wall of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710. With the above structure, the outer diameter of the side wall of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710 can be elastically reduced, so that the flow guide housing 700 is adapted to some refueling pipes with smaller diameters.

[0062] Specifically, refer to Figure 1 In the embodiment of the present invention, the two side walls of the flow guide housing 700 corresponding to the notch 760 have a first wall thickness 771, a second wall thickness 772 and a third wall thickness 773, the first wall thickness 771 is adjacent to the side of the notch 760, the second wall thickness 772 is located between the first wall thickness 771 and the third wall thickness 773, and the thicknesses of the first wall thickness 771 and the third wall thickness 773 are both smaller than the second wall thickness 772, the thickness of the first wall thickness 771 gradually increases toward the second wall thickness 772, and the thickness of the third wall thickness 773 gradually decreases away from the second wall thickness 772; wherein, when an external force acts on the side wall of the flow guide housing 700 corresponding to the second wall thickness 772, the outer diameter of the side wall of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710 is reduced. With the above structure, the gradient thickness design can provide appropriate elastic response under the action of external force, and the outer diameter of the side wall of the guide housing 700 corresponding to the outlet end of the guide channel 710 can achieve elastic deformation, which is convenient for reducing the caliber, saving time and effort, and can adapt to some smaller diameter refueling pipes.

[0063] It is understandable that, in the embodiment of the present invention, the main cover housing 600 is provided with a main cover channel 610, and the main cover channel 610 is connected with the guide channel 710 to form a main cover chamber. The main cover unit also includes a valve structure, the valve structure is used to open or close the main cover channel 610, and the valve structure can automatically open and release pressure, the valve structure is rotatably connected to the main cover housing 600, the valve structure is located inside the main cover channel 610, and the valve structure rotates relative to the main cover housing 600 to open or close the main cover channel 610; wherein, the port of the main cover channel 610 cooperates with the valve structure to form a two-way valve, when the pressure in the main cover chamber is greater than the preset threshold value, the valve structure automatically opens and releases pressure to the main cover chamber, and the direction of the valve structure releasing pressure is opposite to the direction in which the valve structure opens the main cover channel 610.

[0064] With the above structure, the main cover housing 600 and the guide housing 700 constitute the main structure of the main cover unit, which can effectively isolate and protect the main cover channel 610 and internal components to prevent the influence of the external environment and the intrusion of substances; the main cover channel 610 is controlled to be opened and closed by the valve structure, and the pressure is automatically released when necessary to ensure that the pressure in the main cover chamber is within a safe range. When the pressure exceeds the preset threshold, that is, when the pressure inside the fuel tank is abnormal, the valve structure is opened, and the valve structure automatically opens to release the pressure to prevent the fuel tank from being damaged, so as to protect safe operation.

[0065] It should be noted that, in an embodiment of the present invention, the auxiliary gate unit is provided with an auxiliary gate chamber 110, which is connected to and communicated with the main cover channel 610, and the opposite ends of the auxiliary gate chamber 110 are respectively the first inlet and the first outlet, and the opposite ends of the main cover chamber are respectively the second inlet and the second outlet.

[0066] It should be noted that the second inlet is an opening at one end of the main cover channel 610 of the main cover shell 600 , and the second outlet is an opening at the other end opposite to the flow guide channel 710 of the flow guide shell 700 .

[0067] Specifically, refer to Figure 5 and Fig.10 In an embodiment of the present invention, a limiting boss 620 is provided at the port of the main cover channel 610, and the limiting boss 620 is hollow; when the valve structure rotates away from the limiting boss 620, the main cover channel 610 is opened, and when the valve structure rotates toward the limiting boss 620, the valve structure and the limiting boss 620 form a blocking cooperation to close the main cover channel 610.

[0068] With the above structure, the limiting boss 620 is located at the port of the main cover channel 610, and has a hollow setting intended to limit the rotation range of the valve structure and provide positioning during rotation. Under the action of the limiting boss 620, the valve structure can open and close the main cover channel 610, and has a sealing structure with excellent sealing performance, which can inhibit the leakage of fuel vapor to the outside of the fuel tank and is simple and reliable.

[0069] Specifically, refer to Figures 5 to 10In the embodiment of the present invention, the valve structure includes: a lower cover 810, the lower cover 810 is located on one side of the inner surface of the limiting boss 620, and the lower cover 810 is rotatably connected to the main cover shell 600; an upper cover 820, the upper cover 820 is located in the hollow area of ​​the limiting boss 620, the upper cover 820 is connected to the lower cover 810, and the upper cover 820 and the lower cover 810 cooperate to form a pressure relief channel, and the interior of the main cover chamber is connected to the outside of the main cover chamber through the pressure relief channel; a valve body assembly 830, the valve body assembly 830 is movably arranged between the lower cover 810 and the upper cover 820, and the valve body assembly 830 has a closed state and a pressure relief state; when the valve body assembly 830 is in the closed state, the connection between the pressure inlet end and the pressure relief end of the pressure relief channel is cut off; when the pressure in the main cover chamber is greater than the preset threshold value, the valve body assembly 830 is in the pressure relief state, and the valve body assembly 830 releases the cutoff of the pressure inlet end and the pressure relief end relative to the pressure relief channel.

[0070] The upper structure is adopted. When the valve structure closes the main cover channel 610, the lower cover 810 covers the hollow part of the limiting boss 620 and cooperates with the inner surface of the limiting boss 620. A pressure relief channel in the valve structure is provided to allow the pressure inside the main cover chamber to be connected to the outside of the main cover chamber through the pressure relief channel. When the pressure in the main cover chamber exceeds the preset threshold, the valve body assembly 830 automatically enters the pressure relief state. The valve body assembly 830 will be converted from a closed state to a pressure relief state, which means that the pressure inlet end and the pressure relief end of the pressure relief channel will be connected, thereby releasing the excessive pressure in the main cover chamber. The automatic response mechanism is conducive to ensuring that the fuel tank and the main cover unit will not be damaged or dangerous when the pressure is too high, providing safety protection; the lower cover 810 is rotatably connected to the main cover shell 600, which is conducive to the adjustment and flexible operation of the valve structure.

[0071] Specifically, refer to Figure 8 and Fig. 9 In the embodiment of the present invention, the lower cover 810 is provided with a lower chamber 811, the upper cover 820 is provided with an upper chamber 821, the lower cover 810 and the upper cover 820 are nested and fixed, and the lower chamber 811 and the upper chamber 821 cooperate to form a valve body chamber, the valve body assembly 830 is movably installed in the valve body chamber, and there is a spacing between the two opposite end surfaces of the upper cover 820 and the lower cover 810 to form a pressure relief gap, the lower cover 810 is provided with a pressure inlet hole 812, and the pressure inlet hole 812 passes through the bottom wall of the lower chamber 811, and the pressure relief gap The gap, the valve body chamber and the pressure inlet hole 812 are connected in sequence to form a pressure relief channel; wherein, when the valve body assembly 830 is in a closed state, the external pressure applied to the valve body assembly 830 is less than a preset threshold value, the valve body assembly 830 abuts against the bottom wall of the lower chamber 811, and blocks the pressure inlet hole 812; when the external pressure applied to the valve body assembly 830 is greater than the preset threshold value, the valve body assembly 830 is separated from the bottom wall of the lower chamber 811, the valve body assembly 830 avoids the pressure inlet hole 812, and the valve body assembly 830 is in a pressure relief state.

[0072] With the above structure, under normal working conditions, when the external pressure on the valve body assembly 830 is less than the preset threshold, the valve body assembly 830 abuts against the bottom wall of the lower chamber 811, shielding the pressure inlet hole 812, thereby preventing the pressure from leaking from the pressure inlet hole 812. At this time, it is in a closed state, ensuring the stability of the valve structure under normal pressure. When the external pressure exceeds the preset threshold, the valve body assembly 830 will separate from the bottom wall of the lower chamber 811, exposing the pressure inlet hole 812, and it is in a pressure relief state. At this time, the pressure can be released through the pressure relief channel formed by the pressure inlet hole 812, the valve body chamber, and the pressure relief gap, reducing the pressure inside the main cover unit, helping to prevent damage caused by overpressure, and the pressure is controlled and released; the automatic adjustment mechanism reduces the need for manual intervention and improves safety and reliability.

[0073] Specifically, refer to Figure 8 and Fig. 9 In the embodiment of the present invention, the valve body assembly 830 includes: a valve body main body 831, the valve body main body 831 is movably arranged in the valve body chamber, the valve body main body 831 is provided with a valve body sealing layer 832, the cross-sectional area of ​​the valve body sealing layer 832 is larger than the cross-sectional area of ​​the pressure inlet hole 812, so as to seal the pressure inlet hole 812; a valve body reset member 833, one end of the valve body reset member 833 is installed on the valve body main body 831, and the other end of the valve body reset member 833 is installed on the valve body main body 831, and the valve body reset member 833 is used to drive the valve body main body 831 to abut against the bottom wall of the valve body chamber.

[0074] Through the above arrangement, the valve body 831 is provided with a valve body sealing layer 832, whose cross-sectional area is larger than the cross-sectional area of ​​the pressure inlet hole 812, ensuring that when the valve body 831 moves to the closed position, the valve body sealing layer 832 can completely cover and close the pressure inlet hole 812, maintaining the normal pressure operation inside the main cover unit, ensuring safety and stability; the valve body reset member 833 is connected to both ends of the valve body 831, and can drive the valve body 831 to abut against the bottom wall of the valve body chamber. The design purpose is to automatically reset the valve body 831 after it is opened, so that the valve body 831 returns to the initial closed position, increasing the stability of the entire valve structure, and preventing the valve body 831 from becoming unstable due to external force or pressure changes. In addition, the automatic reset feature also plays a positive role in safety, ensuring that the valve body can close automatically in certain unexpected situations.

[0075] Specifically, refer to Figure 8 and Fig. 9In the embodiment of the present invention, the valve body 831 is provided with a mounting cavity 8311, the bottom wall of the upper chamber 821 is provided with a mounting protrusion 8211, and the valve body reset member 833 is a spring, one end of the spring abuts against the mounting cavity 8311, and the other end of the spring is sleeved on the mounting protrusion 8211. Through the above arrangement, the spring can generate elastic force when the valve body 831 moves, and the elastic force can push the valve body 831 to automatically return to the initial closed position, ensuring that the valve body 831 is quickly reset after the closing operation, having better automation capabilities during operation, ensuring the sealing effect of the pressure inlet hole 812, and the design of the entire structure provides stable force transmission and reset effects, which helps to ensure the stability and reliability of the valve body 831 during use; at the same time, the design and application of the spring can reduce the friction and impact between the valve body 831 and other components, thereby extending the service life of the valve body assembly 830.

[0076] It is understandable that, referring to Figure 8 and Fig. 9 In the embodiment of the present invention, the valve body sealing layer 832 includes a sealing body 8321 and a mounting column 8322 connected to the sealing body 8321, and the mounting column 8322 has a clamping section and a limiting section; the bottom wall of the mounting cavity 8311 is provided with a mounting hole, and the mounting column 8322 is penetrated through the mounting hole, wherein the clamping section corresponds to the mounting hole, and the limiting section is located inside the mounting cavity 8311, and the cross-sectional area of ​​the limiting section is larger than the cross-sectional area of ​​the mounting hole, and the lower end surface of the limiting section abuts against the upper surface of the bottom wall of the mounting cavity 8311 to limit the valve body sealing layer 832 from being separated from the valve body 831, ensuring the stable installation of the valve body sealing layer 832 on the valve body, thereby effectively realizing the sealing function and preventing leakage; the design of the mounting column 8322 and the limiting section improves the fixing degree of the valve body sealing layer 832 on the valve body 831, and enhances the overall structural strength and durability of the entire valve structure.

[0077] It should be noted that, in the embodiment of the present invention, the valve body sealing layer 832 is an elastic rubber sealing member, which can adapt to the irregularities on the surface of the valve body 831, and can effectively improve the sealing performance, durability and adaptability of the valve structure. Of course, the valve body sealing layer 832 can also be made of other materials, which is not limited here; in addition, the valve body reset member 833 can also be an elastic sheet, an elastic column, etc., which is not limited here.

[0078] It is understandable that, referring to Figure 8 and Fig. 9In the embodiment of the present invention, the upper cover 820 is provided with a first annular plug-in boss 822, which is arranged around the upper chamber 821, and a first plug-in gap is provided between the outer wall of the first plug-in boss 822 and the outer wall of the upper cover 820, and an assembly protrusion 823 is provided on the outer wall of the first plug-in boss 822, and the assembly protrusion 823 is located in the first plug-in gap; the lower cover 810 is provided with a second annular plug-in boss 813, which is arranged around the lower chamber 811, and the outer wall of the second plug-in boss 813 is connected to the lower chamber 811. A second plug-in gap is provided between 811, the second plug-in boss 813 is provided with an assembly arm 814, and the assembly arm 814 is provided with an assembly hole 8141; wherein, the first plug-in boss 822 is inserted in the second plug-in gap, and there is a spacing between the end face of the first plug-in boss 822 and the bottom wall of the lower cover 810, the second plug-in boss 813 is arranged corresponding to the second plug-in gap, and the assembly arm 814 is inserted in the second plug-in gap, and the assembly hole 8141 is snap-fitted with the assembly protrusion 823 to limit the lower cover 810 and the upper cover 820 from moving back to back in the first direction.

[0079] Through the above structure, the first plug-in boss 822 is inserted into the second plug-in gap, and the assembly arm 814 is also inserted into the second plug-in gap. The embedded structure can ensure the firm connection between the upper cover 820 and the lower cover 810, thereby maintaining the stability of the overall structure; the assembly hole 8141 and the assembly protrusion 823 are engaged with each other, and this design can limit the back movement between the upper cover 820 and the lower cover 810 in the first direction. In other words, the upper cover 820 and the lower cover 810 will not be separated or moved in the connection direction, thereby ensuring the integrity of the structure; the above structure simplifies the assembly process of the upper cover 820 and the lower cover 810. It is only necessary to match the first plug-in boss 822 with the second plug-in boss 813, and the assembly hole 8141 is engaged with the assembly protrusion 823 to complete the assembly. The assembly efficiency can be improved; at the same time, the first plug-in boss 822 surrounds the upper chamber 821, and the second plug-in boss 813 surrounds the lower chamber 811, and through clearance fit, it helps to form a good seal between the upper cover 820 and the lower cover 810.

[0080] Specifically, refer to Figure 8 and Fig. 9In the embodiment of the present invention, an arc-shaped push concave surface 824 is provided on one end face of the upper cover 820 that is away from the lower cover 810. The push concave surface 824 is used to match the refueling gun and can position the refueling gun. Through the above-mentioned setting, the design of the push concave surface 824 enables the refueling gun to match the upper cover 820, ensuring that the refueling gun can be correctly inserted and connected to the fuel tank, which can improve the smoothness and efficiency of the refueling operation; the push concave surface 824 not only enables the refueling gun to fit to the correct position, but also can position the refueling gun. Through the shape and position of the push concave surface 824, the refueling gun can be accurately positioned on the upper cover 820, ensuring that the refueling port and the refueling gun are correctly docked during the refueling process, avoiding operational errors; with the push concave surface 824, the refueling operation becomes more convenient and simple, and the correct positioning and connection can be completed by simply inserting the refueling gun into the position where the push concave surface 824 is located, without the need for additional adjustment or operation, which improves the convenience and user experience of the refueling process.

[0081] Specifically, referring to Figures 5-6, in the embodiment of the present invention, a main cover housing 600 is provided with a main shaft 530 and a main cover spring 540, the main cover spring 540 is sleeved on the main shaft 530, the lower cover 810 of the valve structure is rotatably connected to the main shaft 530, and the main cover spring 540 is used to drive the valve structure to rotate and close the main cover channel 610 to a preset position. With the above structure, the main cover spring 540 is sleeved on the main shaft 530 and connected to the valve structure. The elastic design of the above structure can reduce mechanical impact and wear, extend the life of the valve structure, and the automatic closing function can also reduce the mechanical loss caused by the long-term opening of the valve, ensuring that the main cover channel 610 can be closed automatically when not needed, thereby increasing safety and reliability; through the drive of the main cover spring 540, it can be ensured that the valve structure is fitted to the preset position with appropriate pressure, thereby enhancing the sealing effect; reducing the user's operating burden and improving ease of use.

[0082] Specifically, refer to Figures 6 to 10 In an embodiment of the present invention, the main cover shell 600 is provided with a first opening 630 and a second opening 640, the main shaft 530 has a limiting head and a mounting shaft portion connected to the limiting head, the mounting shaft portion is plugged into the main cover shell 600, and the limiting head is located in the first opening 630, and the end of the mounting shaft portion away from the limiting head is located in the second opening 640; wherein, the main cover shell 600 is provided with a stopping structure 650, the stopping structure 650 is used to limit the movement of the main shaft 530 relative to the main cover shell 600, so that the main shaft 530 can be accurately installed and positioned on the main cover shell 600, ensuring the correct assembly and position of the main shaft 530; after installation, the main shaft 530 will not shift or loosen under the action of the stopping structure 650, thereby improving the stability and reliability of the overall assembly.

[0083] It should be noted that the above-mentioned stop structure 650 is a swingable elastic stop arm, which is located in the first opening 630. Through the swing of the elastic stop arm, the elastic stop arm can abut against or disengage from the limiting head of the main shaft 530; the above-mentioned main cover spring 540 is a torsion spring.

[0084] It is understandable that, referring to Figures 5 to 9 In the embodiment of the present invention, a main cover sealing layer 550 is provided between the upper cover 820 and the lower cover 810. When the valve structure closes the main cover channel 610, the main cover sealing layer 550 is configured to seal the valve structure and the main cover channel 610 structure. With the above structure, when the valve structure closes the main cover channel 610, the main cover sealing layer 550 acts as a sealing device, ensuring the sealing of the main cover channel 610, i.e., the main cover chamber, after the valve structure is closed, thereby improving reliability and inhibiting the leakage of fuel vapor to the outside of the fuel tank; in addition, the main cover sealing layer 550 can not only prevent leakage, but also reduce friction and wear between the valve structure and the main cover channel 610, thereby improving durability, extending service life, and reducing the frequency of maintenance and replacement.

[0085] Specifically, in the embodiment of the present invention, when the valve structure rotates away from the limiting boss 620, the main cover channel 610 is opened; when the valve structure rotates toward the limiting boss 620, the main cover sealing layer 550 abuts against the limiting boss 620 to close the main cover channel 610, thereby achieving sealing, easy operation and reliability. Specifically, in the embodiment of the present invention, the main cover sealing layer 550 is sleeved between the lower cover 810 and the upper cover 820, which can achieve a more compact structural design, help reduce the overall size of the valve structure, save space, and be suitable for various application scenarios; the installation and maintenance of the valve structure are easier, and the main cover sealing layer 550 can be easily disassembled and replaced without cumbersome operating steps, thereby reducing the difficulty and cost of maintenance.

[0086] Specifically, refer to Figures 5 to 9 In the embodiment of the present invention, an assembly groove 815 and a support end face 816 are provided on the end of the lower cover 810 facing the upper cover 820, and the assembly groove 815 and the support end face 816 surround the second plug-in boss 813 in sequence from the inside to the outside, and a limiting end face 825 is provided on the end of the upper cover 820 facing the lower cover 810, and the support end face 816 and the assembly groove 815 are both spaced apart from the limiting end face 825, and the assembly groove 815 and the limiting end face 825 are correspondingly arranged; wherein, the main cover sealing layer 550 comprises an assembly section 551 and a sealing section 552 connected to the assembly section 551, the assembly section 551 is sleeved on the second plug-in boss 813, and the assembly section 551 is accommodated in the assembly groove 815, the sealing section 552 is attached to the support end face 816, and the spacing between the limiting end face 825 and the upper edge of the side wall of the assembly groove 815 is less than the thickness of the assembly section 551.

[0087] With the above structure, the assembly section 551 of the main cover sealing layer 550 is sleeved on the second plug-in boss 813 and accommodated in the assembly groove 815, and the sealing section 552 is fitted to the support end face 816. The above structural design provides a high sealing performance, ensures good fit and effective sealing after assembly, and avoids leakage of fluid or gas; the fit of the sealing section 552 and the sleeve of the assembly section 551 enable the main cover sealing layer 550 to maintain a stable and accurate positioning in the assembly groove 815, enhance the reliability of the valve structure, and reduce the problems that may be caused by inaccurate assembly; because the assembly section 551 is accommodated in the assembly groove 815, the main cover sealing layer 550 is not easily affected by external forces during operation, thereby enhancing its durability and service life; the entire structure is more compact, space-saving, suitable for various application scenarios, and the installation process is simple and convenient. During maintenance, due to the clear structure, it is easier to disassemble and replace the main cover sealing layer 550, and it also protects the inside of the main cover unit from the influence of the external environment, improving stability and durability.

[0088] It should be noted that in the embodiment of the present invention, the main cover sealing layer 550 is a sealing rubber pad. The sealing material generally has good elasticity and durability, and can maintain its sealing performance for a long time without being easily damaged or aged. In addition, the sealing rubber pad also has corrosion resistance, high temperature resistance and chemical resistance, and is suitable for sealing requirements in various environments and working conditions. Therefore, using the sealing rubber pad as the main sealing layer can effectively ensure the sealing of the main cover channel 610 and the valve structure, and improve reliability.

[0089] It is understandable that, referring to Figure 6 In an embodiment of the present invention, the main cover unit is provided with a gas circulation structure, and the gas circulation structure passes through the inside and outside of the main cover chamber; wherein, the inside of the main cover chamber and the end openings of the main cover chamber are both connected to the gas circulation structure, so that the gas circulates inside and outside between the main cover chamber and the gas circulation structure. With the above structure, since the gas circulation structure passes through the inside and outside of the main cover shell 600, the above design can ensure that the gas flows smoothly between the main cover chamber and the gas circulation structure, forming a stable gas circulation. When the gas can circulate freely between the main cover chamber and the outside, it helps to maintain the pressure balance between the inside and the outside of the chamber, and avoid structural damage caused by pressure differences.

[0090] Specifically, refer to Figure 6 and Figure 7In the embodiment of the present invention, the gas circulation structure includes a first gas circulation port 910, which is disposed between the side wall of the main cover housing 600 and the side wall of the flow guide housing 700, and the first gas circulation port 910 corresponds to the main cover chamber. With the above structure, the gas flows smoothly by providing the first gas circulation port 910, and the structure is simple and easy to manufacture.

[0091] Specifically, referring to the figures and the figures, in the embodiment of the present invention, the gas circulation structure further includes a second gas circulation port 920, which is opened on the side wall of the main cover shell 600, and the second gas circulation port 920 corresponds to the main cover chamber; wherein, the second gas circulation port 920 and the second gas circulation port 920 are arranged at intervals. With the above structure, the second gas circulation port 920 is also provided to cooperate with the first gas circulation port 910, and the pressure can be further fully adjusted, so that the gas flow can be more evenly distributed, and the possible local gas pressure or temperature changes can be reduced, so as to optimize the gas circulation structure and improve flexibility, stability and safety.

[0092] It should be noted that, in the embodiment of the present invention, the first gas circulation port 910 and the second gas circulation port 920 are respectively located on the opposite side walls of the main cover chamber, which can better balance the flow of gas in the main cover chamber, help reduce the local pressure or temperature difference of the gas, and thus improve stability and performance; it can avoid the space limitations that may be caused by the concentrated installation of multiple gas circulation ports on the same side wall of the main cover shell 600, thereby more flexibly designing and laying out other components of the system.

[0093] It should also be noted that, in the embodiment of the present invention, the position where the valve structure closes the main cover chamber is higher than the position where the gas circulation structure is located on the main cover shell 600. With the above structure, during assembly, the main cover unit is inserted into the refueling pipe, the gas circulation structure cooperates with the side wall of the refueling pipe, and the valve structure closes the main cover channel 610, that is, closes the main cover chamber, so that a sealed space is formed between the main cover chamber and the refueling pipe. Therefore, the gas flows along the first gas circulation port 910 and the second gas circulation port 920 to the outside of the main cover shell 600, and flows back to the main cover chamber through the opening of the guide channel 710 of the guide shell 700, thereby circulating; or the gas flows to the outside of the main cover chamber through the opening of the guide channel 710 of the guide shell 700, and flows into the main cover chamber through the first gas circulation port 910 and the second gas circulation port 920, thereby circulating. Therefore, when the main cover chamber needs to be closed, the valve structure can effectively prevent the gas from leaking from the main cover chamber to the external environment, which helps to maintain the gas pressure and composition inside the main cover chamber stable, and can reduce the interference of the valve structure on the gas circulation structure. When the valve structure needs to be operated or maintained, it will not affect the gas circulation structure, thereby ensuring normal operation.

[0094] Specifically, refer to Figure 5 , Figure 6 and Figure 7 In the embodiment of the present invention, the outer wall of the main cover housing 600 is sleeved with a main cover sealing ring 560. In the first direction, the main cover sealing ring 560 is located on the main cover housing 600 at a position higher than the position where the valve structure closes the main cover chamber. With the above arrangement, when the main cover channel 610, i.e., the main cover chamber is closed, the main cover sealing ring 560 is at a higher position, which helps to improve the sealing performance between the refueling pipe and the main cover housing 600, can effectively prevent gas or liquid from leaking from the main cover chamber to the external environment, maintain airtightness, and reduce the risk of the main cover sealing ring 560 being damaged or accidentally destroyed.

[0095] Specifically, refer to Fig.10 In the embodiment of the present invention, the inner side wall of the main cover housing 600 is provided with a first annular step 661, a second annular step 662 and a third annular step 663. In the first direction, the first annular step 661, the second annular step 662 and the third annular step 663 are in a step structure that descends from the outside to the inside in sequence; wherein the center line of the first annular step 661 coincides with the center line of the main cover chamber, and the second annular step 662 and the third annular step 663 are both offset from the center line of the main cover chamber. With the above structure, the width of one side of the step structure is greater than the width of the other side, so as to provide an installation position for the main shaft 530 and the main cover spring 540, and prevent the installation position of the main shaft 530 and the main cover spring 540 from being blocked and damaged, thereby playing a protective role.

[0096] It is understandable that, referring to Figure 1 , Figure 2 , Figure 3 and Figure 5 In the embodiment of the present invention, the flow guide housing 700 is provided with a guide structure 720 and a limit structure 730. The guide structure 720 is located in the flow guide channel 710. The guide structure 720 is used to guide the insertion of the refueling gun. The limit structure 730 is located in the flow guide channel 710. The upper end surface of the limit structure 730 and the upper end surface of the flow guide housing 700 corresponding to the insertion end of the flow guide channel 710 have an avoidance spacing; wherein the refueling gun is guided to a position abutting against the limit structure 730 by the guide structure 720 to limit the insertion stroke of the refueling gun. With the above structure, the guide structure 720 is designed to guide the insertion of the refueling gun, and can guide the refueling gun to the correct position to ensure that it can be accurately inserted into the flow guide housing 700; and the limit structure 730 is intended to limit the insertion depth of the refueling gun, in order to ensure that the refueling gun does not directly contact the outlet end of the flow guide housing 700 when inserted, thereby preventing damage to the flow guide housing 700 or the refueling gun, so as to facilitate the diversion of oil and ensure the accuracy and safety of the refueling operation.

[0097] It is understandable that, referring to Figure 1 and Figure 3 In the embodiment of the present invention, the guide structure 720 is a guide boss, and a guide arc surface 721 is provided on a side wall of the guide boss facing the center of the flow guide channel 710, and the distance between the guide arc surface 721 and the inner side wall of the flow guide housing 700 gradually increases from the insertion end of the flow guide channel 710 to the outlet end of the flow guide channel 710. Through the above arrangement, the role of the guide arc surface 721 is to provide a guiding surface when the fuel gun is inserted, ensuring that the fuel gun can be accurately inserted into the flow guide channel 710; and the distance between the guide arc surface 721 on the guide boss and the inner side wall of the flow guide housing 700 is gradually increased from the insertion end to the outlet end of the flow guide channel 710, in order to gradually relax the restrictions on the insertion angle and position of the fuel gun during the insertion of the fuel gun, ensuring that the fuel gun can be smoothly inserted into the flow guide channel 710.

[0098] It is understandable that, referring to Figure 1 and Figure 3 In the embodiment of the present invention, a side wall of the limiting structure 730 facing the center of the flow guiding channel 710 is provided with a limiting step 731, and the limiting step 731 is concave. When the fueling gun is inserted, it abuts against the limiting step 731, which serves to provide a reference point or structure for limiting the insertion depth, ensuring that the fueling gun is inserted into the correct position of the flow guiding channel 710, with a simple structure, stability and reliability.

[0099] Specifically, refer to Figure 1 and Figure 3 In the embodiment of the present invention, the lowest position of the guide arc surface 721 is aligned with the lowest position of the limit step 731, ensuring the maximum insertion depth of the fuel gun when inserted. In this way, when the fuel gun is inserted into the guide channel 710, its insertion depth will be limited by the guide arc surface 721 and the limit step 731, thereby avoiding damage or other problems caused by excessive insertion; the alignment setting can simplify the operation process, making it easier for refueling personnel to understand and grasp the correct insertion depth during use, reducing the possibility of operational errors, and helping to ensure a good connection between the fuel gun and the guide channel 710 to avoid leakage or other safety hazards.

[0100] Specifically, refer to Figure 1 and Figure 3In the embodiment of the present invention, the limiting structure 730 is a limiting protrusion, which is arranged along the length direction of the flow guide housing 700, wherein the upper end surface of the limiting protrusion and the upper end surface of the flow guide housing 700 corresponding to the insertion end of the flow guide channel 710 have an avoidance spacing, and the lower end surface of the limiting protrusion extends to the lower end surface of the flow guide housing 700 corresponding to the outlet end of the flow guide channel 710. The setting of the avoidance spacing can provide enough space for the refueling gun, so that it can be smoothly inserted into the flow guide channel 710 without obstruction, ensuring the smooth progress of the refueling operation.

[0101] Specifically, in the embodiment of the present invention, there are multiple limiting structures 730, and the multiple limiting structures 730 are spaced and arranged relatively to improve the stability of the limiting. Specifically, in the embodiment of the present invention, the guide structure 720 is located between two adjacent limiting structures 730, which further improves the stability of the limiting, can effectively optimize the refueling operation process, and improve the safety and efficiency of the operation.

[0102] Specifically, in the embodiment of the present invention, the inner diameter of the flow guide housing 700 gradually decreases along the first direction from the insertion end to the outlet end thereof. With the above structure, since the inner diameter of the flow guide housing 700 gradually decreases, the flow of oil inside the flow guide housing 700 will be restricted and guided, thereby improving the flow efficiency of the fluid.

[0103] It is also understandable that, with reference to Figures 1 to 3 In the embodiment of the present invention, the flow guide housing 700 is further provided with a spoiler structure 740, which is located in the flow guide channel 710 and is used to slow down the oil outflow speed at the outlet end of the flow guide channel 710; wherein, the spoiler structure 740 is arranged on the inner wall of the flow guide channel 710 along the length direction of the flow guide housing 700. With the above structure, the existence of the spoiler structure 740 blocks the oil just coming out, thereby slowing down the speed of the fluid passing through the outlet end of the flow guide channel 710, which helps to control the flow rate, reduce the impact force and liquid splashing when the oil is sprayed out, improve the safety and comfort of operation, and make the fluid more evenly distributed and flow in the flow guide channel 710, avoid the uneven phenomenon when the fluid flows out, ensure that the fluid flow near the outlet is more stable and controllable, and can effectively reduce the splashing and splashing phenomenon when the fluid flows out, and clean; by slowing down the fluid outflow speed, the spoiler structure 740 helps to reduce energy consumption and reduce the waste of fluid, which is in line with the concept of energy saving and environmental protection.

[0104] Specifically, refer to Figure 1 and Figure 3In the embodiment of the present invention, the spoiler structure 740 is a spoiler convex rib connected to the guide housing 700, and the spoiler convex rib is convexly arranged toward the center line of the guide channel 710. Through the above arrangement, the spoiler convex rib is directly connected to the guide housing 700 and convexly arranged toward the center line, which enhances the stability and rigidity of the guide housing 700, reduces the possibility of vibration and deformation, makes maintenance and cleaning more convenient, reduces the workload and time cost of maintenance personnel, and improves the overall economy and sustainability.

[0105] Specifically, in the embodiment of the present invention, the lower end surface of the spoiler rib is spaced from the lower end surface of the outlet end of the flow guide channel 710 on the flow guide housing 700, so that the oil can be gathered in the spaced area and stably flow into the fuel tank before entering the fuel tank after being acted upon by the spoiler rib. Specifically, in the embodiment of the present invention, a side wall of the spoiler rib facing the center line of the flow guide channel 710 is parallel to the center line of the flow guide channel 710, and the structure is simple and easy to manufacture.

[0106] Specifically, in an embodiment of the present invention, the spoiler rib and the guide shell 700 are an integrated structure, and the spoiler rib can be directly manufactured as a part of the guide shell 700, which simplifies the manufacturing and installation process, reduces the number of parts and assembly steps, and saves additional materials and manufacturing costs.

[0107] Specifically, in the embodiment of the present invention, there are multiple groups of spoiler structures 740, which are spaced apart on the inner wall of the guide channel 710, which helps to disperse the pressure of the oil fluid, improve energy efficiency, and improve flow stability and controllability.

[0108] Specifically, in the embodiment of the present invention, the inner wall of the flow guide channel 710 includes a first straight section 711, an inclined guide section 712, and a second straight section 713, which are sequentially arranged along the length direction of the flow guide housing 700. Through the above structure, the first straight section 711 can guide the fluid into the flow guide channel 710, the inclined guide section 712 can guide the fluid to the downstream direction and accelerate the flow speed of the fluid, and the second straight section 713 is used to stabilize the flow of the fluid, so that it forms a stable flow state inside the flow guide housing 700.

[0109] Specifically, in an embodiment of the present invention, the guide shell 700 is provided with a guide gas concave edge, which passes through the inside and outside of the guide channel 710 and is connected to the notch 760; the main cover shell 600 has a main cover gas concave edge, and the guide gas concave edge and the guide gas cooperate to form a first gas circulation port 910, so that the gas can circulate inside and outside the guide shell 700 and the main cover shell 600, with a simple structure and easy manufacturing.

[0110] It should be noted that in the embodiment of the present invention, at the same time, the role of the notch 760 is not only to shrink the mouth, but also to cooperate with the gas circulation structure to assist gas circulation. It can be understood that the gas can not only flow through the outlet end of the guide channel 710, but also flow through the notch 760.

[0111] It is also understandable that, with reference to Figures 1 to 7 and Fig.10 In the embodiment of the present invention, the main cover shell 600 and the diversion shell 700 are split structures. When the force in the direction of separation of the main cover shell 600 and the diversion shell 700 is less than the preset force, the two remain in the docking state; and when the force in the direction of separation of the main cover shell 600 and the diversion shell 700 is greater than the preset force, the two are separated. With the above structure, the main cover shell 600 and the diversion shell 700 are set to be split. Therefore, when the fuel gun is inserted with the wrong force, the main cover shell 600 and the diversion shell 700 are separated. When the fuel gun is vibrated or subjected to external forces, it will stop discharging oil or stop refueling. Therefore, it can be understood that the separation of the main cover shell 600 and the diversion shell 700 can play a prompting role and improve safety performance. At the same time, the split structure also facilitates the replacement of the main cover shell 600 and the diversion shell 700 with corresponding sizes, thereby improving adaptability and flexibility.

[0112] Specifically, refer to Figures 1 to 7 and Fig.10 In the embodiment of the present invention, the main cover housing 600 and the flow guide housing 700 are detachably connected together through a connection structure, so that the device can be assembled and disassembled as needed, thereby increasing flexibility and being easier to adapt to different working scenes or needs. The flow guide housing 700 or the main cover housing 600 of different types or sizes can be replaced as needed.

[0113] Specifically, refer to Figures 1 to 3 , Figure 6 and Figure 7In the embodiment of the present invention, the connection structure includes a connection protrusion 670 and a connection groove 780, wherein the connection protrusion 670 is provided at one end of the main cover shell 600 opposite to the diversion shell 700, and the connection groove 780 is provided at one end of the diversion shell 700 opposite to the main cover shell 600; wherein the connection protrusion 670 and the connection groove 780 are snap-fitted, and the projections of the opposite ends of the main cover shell 600 and the diversion shell 700 overlap. Of course, in some embodiments, the above-mentioned connection protrusion 670 can also be provided on the diversion shell 700, and the connection groove 780 is provided on the main cover shell 600, which is not limited here. Through the above-mentioned setting, the connection protrusion 670 and the connection groove 780 are snap-fitted to ensure the stability and safety of the connection. It can prevent the main cover unit from loosening or falling off during operation, and ensure normal operation; the projections of the opposite ends of the main cover shell 600 and the diversion shell 700 overlap, which can increase the tightness and stability of the connection and further improve the reliability.

[0114] Specifically, in the embodiment of the present invention, the connection protrusion 670 is configured to be able to swing elastically relative to the middle of the main cover chamber. With the above structure, since the connection protrusion 670 has the characteristics of elastic swinging, it can move relatively freely in the middle of the main cover shell 600. When disassembling, the connection protrusion 670 can be swung to a position that is convenient for disassembly by applying appropriate force, thereby simplifying the disassembly process, reducing the difficulty of disassembly, and reducing the waste of manpower and time; at the same time, the connection protrusion 670 can reduce the friction with the main cover shell 600 or other components when swinging, thereby protecting the integrity and durability of the connection structure.

[0115] Specifically, refer to Figures 1 to 3 , Figure 6 and Figure 7In the embodiment of the present invention, a first plug-in recess 681 and a first plug-in protrusion 682 are provided on the end of the main cover shell 600 opposite to the guide shell 700. The first plug-in recess 681 is formed by a concave portion of the outer wall of the main cover shell 600. The side of the first plug-in protrusion 682 is connected to the side of the first plug-in recess 681. The outer surface of the first plug-in protrusion 682 is higher than the bottom surface of the first plug-in recess 681. A second plug-in recess 791 and a second plug-in protrusion 792 are provided on the end of the guide shell 700 opposite to the main cover shell 600. The recess 791 is formed by a concave inwardly concave portion of the outer wall of the flow guide shell 700, the side of the second plug-in protrusion 792 is connected to the side of the second plug-in recess 791, and the outer surface of the second plug-in protrusion 792 is higher than the bottom surface of the second plug-in recess 791; the first plug-in protrusion 682 is plug-in into the second plug-in recess 791, and the second plug-in protrusion 792 is plug-in into the first plug-in recess 681, so that a part of the structure of the end portion of the main cover shell 600 opposite to the flow guide shell 700 is sheathed on the outer wall of the flow guide shell 700, and the other part is embedded in the inner wall of the flow guide shell 700.

[0116] Through the above structure, the contact area between the components can be increased by mutual insertion. After connection, of the two components of the main cover shell 600 and the diversion shell 700, a part of the structure of the main cover shell 600 is exposed on the outer wall of the diversion shell 700, while the other part is embedded in the inner wall of the diversion shell 700, which not only provides external protection and coverage, but also ensures a stable connection inside. It is very important to ensure the sealing and waterproofness between the components.

[0117] Specifically, in the embodiment of the present invention, a limiting boss 7911 is provided in the second plug-in recess 791, and the limiting boss 7911 is provided with a limiting slope, which is inclined to the bottom surface of the second plug-in recess 791, and the limiting slope is connected to a side surface of the second plug-in recess 791 and is vertically arranged to form a limiting groove, wherein the two adjacent side surfaces on the first plug-in protrusion 682 are vertically arranged and plug-in cooperate with the limiting groove, which helps to provide additional safety protection, avoid accidents or damages, and increase the stability and firmness of the connection.

[0118] Specifically, refer to Figures 1 to 3 , Figure 6 and Figure 7In the embodiment of the present invention, the main cover shell 600 is provided with an insertion port 691, which is arranged to extend along the first direction; the flow guide shell 700 is provided with an insertion convex strip, which is arranged to extend along the first direction, and a plurality of insertion convex strips are inserted and matched with a plurality of insertion ports 691 one by one, thereby further limiting the relative rotation of the main cover shell 600 and the flow guide shell 700, and improving the stability of the installation. It should be noted that the insertion convex strip is the upper part structure of the spoiler convex rib, and the main cover shell 600 is provided with an avoidance port 692 that is inserted and matched with the guide convex strip, which also improves the stability of the installation.

[0119] It should be noted that, in this embodiment, the above-mentioned guide structure 720 and the limiting structure 730 both have a certain flow-disturbing effect. Specifically, in the embodiment of the present invention, there are multiple insertion ports 691 and multiple insertion convex strips; multiple insertion ports 691 are distributed at intervals on the side wall of the main cover shell 600 corresponding to the first insertion recess 681, and the insertion ports 691 are connected to the first insertion recess 681; multiple insertion convex strips are distributed at intervals on the inner side wall of the flow guide shell 700 corresponding to the second insertion protrusion 792, and multiple insertion bosses are plugged in and matched with multiple insertion ports 691 one by one. The above-mentioned arrangement can ensure that the connection between the main cover shell 600 and the flow guide shell 700 is stable and not easy to deflect, making the assembly process simpler.

[0120] Specifically, refer to Figure 1 , Figure 2 , Figures 11 to 17 In the embodiment of the present invention, the auxiliary gate unit includes an auxiliary gate housing 100, a gate structure 200 and a refueling gun guide rail 300. The auxiliary gate housing 100 is provided with an auxiliary gate chamber 110. The two opposite ends of the auxiliary gate chamber 110 are respectively a first inlet and a first outlet. The auxiliary gate chamber 110 is used for inserting a refueling gun; the gate structure 200 is used to open or close the first inlet. The gate structure 200 is used to open or close the first inlet. The gate structure 200 is fixedly arranged inside the auxiliary gate chamber 110. Part of the gate structure 200 is fixedly matched with the auxiliary gate housing 100; the refueling gun guide rail 300 is used to guide the refueling gun to move. The refueling gun guide rail 300 is fixedly arranged on the auxiliary gate. Inside the chamber 110, the fueling gun guide rail 300 is located on one side of the gate structure 200, and part of the structure of the fueling gun guide rail 300 is fixedly matched with the auxiliary gate housing 100; in a first direction, one end of the gate structure 200 abuts against an inner wall of one end of the auxiliary gate chamber 110, and the other end of the gate structure 200 abuts against one end of the fueling gun guide rail 300; wherein, when the gate structure 200 is subjected to the pushing force of the fueling gun, the first inlet is opened, and the opening direction of the gate structure 200 is toward the location of the first outlet; after the gate structure 200 is out of contact with the fueling gun, the first inlet is closed, and the closing direction of the gate structure 200 is toward the location of the first inlet.

[0121] Through the above structure, there is no need to unscrew the auxiliary gate unit when refueling, and the refueling gun can be directly inserted, and the gate structure 200 is pushed by the refueling gun to open the first inlet, so that the refueling gun can be inserted into the auxiliary gate chamber 110, the gate structure 200 and the refueling gun guide rail 300 to realize the refueling operation. Through the above structure, the operation of opening and closing the fuel filler cap is omitted when refueling, and the first inlet can only be opened when the gate structure 200 is subjected to the push force of the fuel gun, and the door opening direction is toward the position of the first outlet; the first inlet can only be closed after the gate structure 200 is out of contact with the fuel gun, and the door closing direction is toward the position of the first inlet. The above gate structure 200 is a single-door structure to prevent water and dust from entering, and can ensure that the door is tightly closed in the non-refueling state, thereby achieving waterproof and dustproof, saving time and effort, and avoiding the situation of leaking; at the same time, when the fuel gun is inserted, the auxiliary gate chamber 110, the gate structure 200 and the fuel gun guide rail 300 are sequentially abutted and matched, thereby improving the stability of the gate structure 200, thereby improving the stability and reliability of the entire auxiliary gate unit.

[0122] Reference Figure 5 , Figures 11 to 14 In the embodiment of the present invention, the gate structure 200 includes: a gate bracket 210, in which a gate passage 215 is provided; a gate member 220, which is movably connected to one end of the gate bracket 210, and the gate member 220 moves relative to the gate bracket 210 to have a first position and a second position. When the gate member 220 is in the first position, the gate member 220 blocks the gate passage 215; when the gate member 220 is in the second position, the gate member 220 releases the gate passage 215. 15 blocking; gate reset member 230, gate reset member 230 and gate member 220 transmission cooperation, gate reset member 230 is used to drive gate member 220 to move toward the first position direction; wherein, gate bracket 210, gate member 220 and gate reset member 230 are configured as a split structure, and the projection length of the part of the structure on gate reset member 230 that cooperates with gate member 220 on gate member 220 is greater than the distance from the outer wall of gate member 220 to the center line of gate member 220. By adopting the above structure, gate member 220 opens gate passage 215 at the second position or closes gate passage 215 at the first position when needed, and the power of gate reset member 230 is used to achieve automatic closing. The configuration allows the gate support 210, the gate member 220 and the gate reset member 230 to be a split structure, which simplifies the structure, facilitates manufacturing, reduces costs, and can be easily disassembled; moreover, the projection length of the partial structure of the gate reset member 230 that cooperates with the gate member 220 on the gate member 220 is greater than the distance from the outer wall of the gate member 220 to the center line of the gate member 220, which can increase the stability and reliability of the closing force and ensure that the gate structure 200 can always maintain good sealing performance and operating efficiency during operation.

[0123] Specifically, refer to Figure 12 to Figure 14 In the embodiment of the present invention, the gate bracket 210 is detachably connected to the gate member 220, and the gate member 220 is rotatable relative to the gate bracket 210. The structure is reasonable and compact, and the space utilization rate is improved.

[0124] Specifically, refer to Figure 12 to Figure 14 In the embodiment of the present invention, a first connecting arm 221 is provided on the gate member 220; a first mounting groove 211 is provided at the end of the gate bracket 210, the first mounting groove 211 is provided with a first end surface opening and a first side surface opening, a first protrusion 212 is provided on the side wall of the first mounting groove 211, the first protrusion 212 is located at the first end surface opening, and the first protrusion 212 has an avoidance state and a limiting state; wherein, when the first protrusion 212 is in the avoidance state, the first connecting arm 221 is rotatably inserted into the first mounting groove 211 along the first end surface opening and the first side surface opening; when the first protrusion 212 is in the limiting state, the projections of the first protrusion 212 and the first connecting arm 221 on the bottom of the first mounting groove 211 overlap, so as to limit the first connecting arm 221 from being separated from the first mounting groove 211.

[0125] Through the above arrangement, the first connecting arm 221 can be rotatably inserted into the first mounting groove 211 along the first end face opening and the first side face opening, so that the gate member 220 can be more convenient to install and disassemble, while ensuring the stability of the connection; in the avoidance state, the first connecting arm 221 is allowed to be inserted into the mounting groove, and in the limiting state, the first protrusion 212 and the first connecting arm 221 are projected on the bottom of the mounting groove and overlap, thereby limiting the first connecting arm 221 from being separated from the mounting groove. The above design can ensure that the gate member 220 will not accidentally fall off or move after installation, thereby enhancing the stability and safety of the cooperation between the gate member 220 and the gate bracket 210.

[0126] Specifically, refer to Figure 12 to Figure 14 In an embodiment of the present invention, the gate reset member 230 is a gate spring, which includes two spiral rod segments 231 and a driving rod segment 232, and the two opposite sides of the driving rod segment 232 are respectively connected to the two spiral rod segments 231; wherein, the gate bracket 210 is provided with two first positioning channels 213 along the first direction, and the two spiral rod segments 231 correspond to the two first positioning channels 213 one by one and are plug-in matched to limit the rotation of the gate spring relative to the gate bracket 210, and the driving rod segment 232 abuts against the inner surface of the gate member 220, and the above connection method ensures that the action of the gate spring can accurately drive the gate member 220 to realize the opening and closing function.

[0127] Specifically, refer to Figure 12 to Figure 14In the embodiment of the present invention, the gate bracket 210 is provided with two first positioning grooves 214, and the bottom of each first positioning groove 214 is provided with a first positioning channel 213, the spiral region of the spiral rod segment 231 is located in the first positioning groove 214, and one end of the spiral rod segment 231 is inserted into the first positioning channel 213; wherein, the bottom of the first positioning groove 214 is used to support the spiral rod segment 231 to limit the movement of the spiral rod segment 231 along the first direction; the opposite side walls of the first positioning groove 214 abut against the opposite sides of the spiral rod segment 231 to limit the movement of the spiral rod segment 231 relative to the gate bracket 210 along the second direction; the first positioning channel 213 is used to limit the spiral rod segment 231 from detaching from the gate bracket 210 along the second direction. With the above structure, the setting of the first positioning groove 214 and the cooperation between the groove bottom and the two side walls and the spiral rod segment 231 can limit the movement of the spiral rod segment 231 in two directions, ensuring that it is firmly fixed on the gate bracket 210 at the specified position, thereby enhancing the stability and reliability of the entire mechanism; the setting of the first positioning channel 213 can prevent the spiral rod segment 231 from accidentally detaching from the gate bracket 210 along the second direction, ensuring that it is always tightly connected to the gate bracket 210.

[0128] Specifically, refer to Figure 12 to Figure 14 In the embodiment of the present invention, the rod portion at one end of the spiral rod segment 231 is inclined to the spiral region of the spiral rod segment 231, and the vertical distance between the two end surfaces on the rod portion at one end of the spiral rod segment 231 is greater than the maximum width of the first positioning channel 213. It can be further correctly positioned and firmly fixed on the gate bracket 210, thereby improving the assembly accuracy and stability.

[0129] It is also understandable that, with reference to Fig.13 In the embodiment of the present invention, two positioning protrusions are provided on the inner surface of the gate member 220, and the two positioning protrusions are arranged at intervals and cooperate with the inner surface of the gate member 220 to form a second positioning groove 222, and the second positioning groove 222 is inserted and cooperated with the driving rod segment 232, and the two positioning protrusions cooperate with the opposite sides of the driving rod segment 232 one by one to limit the movement of the driving rod segment 232 in the second direction relative to the gate member 220. With the above structure, through the provision of the second positioning groove 222 and the positioning protrusions, the movement of the driving rod segment 232 in the second direction relative to the gate member 220 can be limited, and the operating accuracy of the gate member 220 can be improved, ensuring that it can accurately perform the opening or closing action when needed.

[0130] It is also understandable that, with reference to Figure 12 to Figure 14In the embodiment of the present invention, the gate bracket 210 is provided with a gate channel 215 for the refueling gun to pass through, and the side wall of the gate channel 215 is provided with an avoidance slope 216, which is inclined and connected to the end face of the gate bracket 210, and the connection between the gate reset member 230 and the gate bracket 210 and the avoidance slope 216 are arranged facing each other, thereby avoiding the collision of the connection between the gate spring and the gate bracket 210 during the insertion of the refueling gun, ensuring the stable connection between the gate spring and the bracket during operation, and providing support and stability.

[0131] It is also understandable that, with reference to Fig.12 In the embodiment of the present invention, the outer surface of the gate member 220 is provided with a push boss 223, and there is a gap between the outer wall of the push boss 223 and the outer wall of the gate member 220, and the push boss 223 is provided with a push recess 2231, so that the insertion and pushing are smoother; by increasing the thickness at the push boss 223 corresponding to the first concave surface, the durability of this area is enhanced, thereby extending the service life of the gate member 220. It should be noted that in the embodiment of the present invention, the gate spring is a torsion spring.

[0132] It is understandable that, referring to Figure 1 , Figure 2 , Figures 11 to 17 In the embodiment of the present invention, the auxiliary gate housing 100 is provided with a drain port 120, and the fuel gun guide rail 300 is provided with a drain channel 310 connected to the drain port 120; the auxiliary gate unit also includes a blocking mechanism 400, which is provided on the fuel gun guide rail 300, and the blocking mechanism 400 has a blocking state and an open state; wherein the blocking mechanism 400 in the open state can open the drain channel 310; the blocking mechanism 400 can switch from the open state to the blocking state under the action of external force to block the drain channel 310. Through the specially designed drain port 120 and drain channel 310, a small amount of water flowing in from the gap between the auxiliary gate housing 100 and the gate structure 200 can be discharged from the drain port 120, avoiding the decrease in the sealing performance of the auxiliary gate unit and the partial damage of the main cover unit caused by the insertion of the refueling gun after freezing; and because there are certain sealing requirements for the auxiliary gate unit and the entire refueling device during refueling, a sealing mechanism 400 is provided to seal the drain channel 310 and the drain port 120, so as to achieve sealed refueling while also being able to cope with steam reflux type refueling guns.

[0133] Specifically, in an embodiment of the present invention, the sealing mechanism 400 has an elastic sealing area 411, which is used to seal the drainage channel 310, and the elastic sealing area 411 has a first angle and a second angle; when the elastic sealing area 411 is at the first angle, the elastic sealing area 411 is spaced apart from the drainage channel 310, and part of the structure of the elastic sealing area 411 is located on the path where the refueling gun is inserted; when the elastic sealing area 411 is subjected to the pressing force applied by the external refueling gun, the elastic sealing area 411 is elastically deformed, and the elastic sealing area 411 rotates to the second angle, and the elastic sealing area 411 contacts the drainage channel 310 to close the drainage channel 310; when the pressing force applied by the external refueling gun to the elastic sealing area 411 is cancelled, the elastic member returns to the first angle, and the elastic sealing area 411 is separated from the drainage channel 310. The flexible response and automated operation simplify the refueling process, ensure the safety of operation, improve efficiency, and reduce the workload of operators.

[0134] Specifically, refer to Figure 5 , Fig.11 , Fig.15 and Fig.16 In the embodiment of the present invention, the blocking mechanism 400 includes an elastic plate 410, and the elastic plate 410 has a fixed end and a free end. The fixed end of the elastic plate 410 is installed on the fuel gun guide rail 300 of the auxiliary gate unit and the gate bracket 210, and the free end of the elastic plate 410 faces the drainage channel 310 and the two are arranged at a distance. The elastic blocking area 411 is formed on the plate surface at the free end of the elastic plate 410; wherein the free end of the elastic plate 410 can be attached to the fuel gun guide rail 300 of the auxiliary gate unit corresponding to the drainage channel 310 0, so that the elastic sealing area 411 corresponds to and covers the drainage channel 310, ensuring the precise positioning of the sealing area and effectively covering the drainage channel 310; the installation position of the fixed end of the elastic plate 410 is stable, which can reliably support the elastic sealing area 411 and maintain stability during the refueling process to ensure the sealing effect; in addition, the presence of the elastic plate 410 also helps to compensate for the dimensional changes caused by mechanical tolerances and thermal expansion, so that the entire sealing mechanism 400 can maintain good sealing and stability under various working environments.

[0135] Specifically, refer to Fig.11 , Fig.15 and Fig.16In the embodiment of the present invention, the blocking mechanism 400 further includes a rubber component 420, which is located on one side of the elastic plate component 410, one end of the rubber component 420 is mounted on the auxiliary gate unit, and the other end of the rubber component 420 is provided with a contact protrusion 421; a folding plate portion 412 is provided at the free end of the elastic plate component 410, and a contact protrusion 421 is provided on the rubber component 420, and the contact protrusion 421 is in contact with the plate surface of the folding plate portion 412; wherein, the cross-sectional area of ​​the contact protrusion 421 is smaller than the cross-sectional area of ​​the folding plate portion 412, which helps to improve the accuracy and efficiency of the contact, and also reduces the wear caused by friction.

[0136] Specifically, refer to Figure 5 , Fig.11 , Fig.15 and Fig.16 In the embodiment of the present invention, the upper structures of the gate bracket 210 and the fueling gun guide rail 300 are stacked and clamp the elastic plate 410 and the rubber part 420. Through the upper setting, the stacking setting can increase the stability and rigidity of the entire structure, making it less likely to loosen or deform during operation, and by clamping the elastic plate 410 and the rubber part 420, the entire assembly process can be simplified, and it is also more convenient when maintenance or replacement of parts is required.

[0137] Specifically, refer to Fig.11 , Fig.15 and Fig.16 In the embodiment of the present invention, a fixed channel 321 is provided on the fuel gun guide rail 300, and the fixed end of the elastic plate 410 is curved; the two side walls opposite to the fixed end of the elastic plate 410 are elastically abutted one by one with the two side walls opposite to the fixed channel 321, and part of the structure of the gate bracket 210 abuts against the inner plate surface of the fixed end of the elastic plate 410 to limit the fixed end of the elastic plate 410 from being separated from the fixed channel 321, which helps to limit the fixed end of the elastic plate 410 from being separated from the fixed channel 321, further improving the safety and reliability of the blocking mechanism 400 and ensuring its normal operation during operation; at the same time, due to the elastic matching relationship, maintenance and replacement become simpler and more convenient.

[0138] It is also understandable that, with reference to Fig.11 , Fig.15 and Fig.16In the embodiment of the present invention, a second mounting groove 322 is provided on the fuel gun guide rail 300, and a second protrusion 3221 is provided on the side wall of the second mounting groove 322; a second connecting arm 422 and a connecting channel 423 are provided on the rubber member 420 along its width direction, and the connecting channel 423 is formed between the second connecting arm 422 and one end of the rubber member 420; the second connecting arm 422 is inserted into the second mounting groove 322, and the second protrusion 3221 extends into the connecting channel 423, and the second protrusion 3221 and the second connecting arm 422 overlap in their projections on the bottom of the second mounting groove 322, so as to limit the second connecting arm 422 from being separated from the second mounting groove 322, and provide a certain degree of mechanical fixation; it can be quickly and conveniently installed and disassembled; the purpose of limiting the separation of components is achieved through simple physical connection and geometric structure, and no complex mechanical device or additional locking components are required.

[0139] Specifically, refer to Figures 11 to 14 In the embodiment of the present invention, the gate bracket 210 is provided with a guide protrusion 217 and two positioning concave surfaces 218 along its length direction, and the two positioning concave surfaces 218 are respectively located on opposite sides of the guide protrusion 217, and the rubber component 420 is provided with a guide channel 424 along its length direction; the guide protrusion 217 is inserted into the guide channel 424, and the two opposite side walls of the rubber component 420 corresponding to the guide channel 424 are matched with the two positioning concave surfaces 218 one by one. When the rubber component 420 is inserted into the gate bracket 210 and the fueling gun guide rail 300, the guide protrusion 217 will be inserted into the guide channel 424, and the positioning concave surfaces 218 will be matched with the side walls of the rubber component 420, so that the relative position of the rubber component 420 on the gate bracket 210 will be accurately positioned, and at the same time, the stability between the rubber component 420 and the gate bracket 210 and the fueling gun guide rail 300 is ensured.

[0140] It is understandable that, referring to Figures 11 to 17 In the embodiment of the present invention, the gate bracket 210 is provided with a plug-in protrusion 2191, and the fueling gun guide rail 300 is provided with a plug-in groove 323, wherein, in the first direction from the first inlet to the first outlet, the plug-in protrusion 2191 and the plug-in groove 323 are plug-fitted together, so that the upper parts of the two structures are stacked, thereby improving the assembly stability. Of course, in some embodiments, the gate bracket 210 may also be provided with a plug-in groove 323, and the fueling gun guide rail 300 may be provided with a plug-in protrusion 2191.

[0141] It should be noted that, in the present embodiment, the guide protrusion 217 and the two positioning concave surfaces 218 are both arranged on the outer side wall of the plug-in protrusion 2191 facing outwards, and the structure is compact and the design is reasonable.

[0142] It is understandable that, referring to Figures 11 to 14 as well as Fig.18In an embodiment of the present invention, a plurality of positioning grooves 130 are provided on the inner wall of the auxiliary gate housing 100, and the plurality of positioning grooves 130 are arranged at circumferential intervals. A plurality of elastic fixing members 2193 are provided on the gate bracket 210, and the plurality of elastic fixing members 2193 are arranged at intervals around the outer wall of the gate bracket 210, and the elastic fixing members 2193 are extended along the first direction; wherein each elastic fixing member 2193 is provided with an elastic fixing protrusion 21931, and the elastic fixing protrusion 21931 is arranged along the second direction, and the elastic fixing protrusion 21931 is located on a side wall of the elastic fixing member 2193 away from the gate channel 215. It can be understood that the multiple elastic fixing parts 2193 make the elastic fixing protrusions 21931 engage with the positioning grooves 130 under elastic deformation and resetting, so as to limit the relative movement between the gate bracket 210 and the auxiliary gate housing 100, thereby ensuring the accuracy and stability of the auxiliary gate housing 100 and the gate bracket 210 during installation and use, so that the gate bracket 210 can be effectively aligned and fixed in the desired position.

[0143] It is also understandable that, with reference to Figures 11 to 14 as well as Fig.18 In the embodiment of the present invention, a plurality of first positioning portions 2192 are provided on the gate bracket 210, and the plurality of first positioning portions 2192 are arranged at intervals around the outer wall of the gate bracket 210, and the first positioning portions 2192 arrange the gate bracket 210 along the first direction. Specifically, the outer wall of the gate bracket 210 is provided with a first positioning portion 2192, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a first matching portion 140, and the first matching portion 140 is engaged with the first positioning portion 2192 to limit the circumferential rotation of the gate bracket 210 relative to the auxiliary gate chamber 110, which can increase the contact area between the gate bracket 210 and the auxiliary gate housing 100, improve the overall stability of the auxiliary gate unit, and enhance the connection.

[0144] Specifically, refer to Fig.11 , Fig.15 , Fig.16 as well as Fig.18 In this embodiment, the outer wall of the fueling gun guide rail 300 is provided with a second positioning portion 330, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a second matching portion 150, and the second matching portion 150 is engaged with the second positioning portion 330 to limit the circumferential rotation of the fueling gun guide rail 300 relative to the auxiliary gate chamber 110. During the installation process, the matching structure of the second positioning portion 330 and the second matching portion 150 plays a positioning and limiting role, ensuring the stable installation of the fueling gun guide rail 300, while preventing problems caused by rotation during use. It can be understood that the above-mentioned second positioning portion 330 is a protruding structure, the second matching portion 150 is a groove structure, or the two can be replaced with each other.

[0145] Specifically, refer to Fig.11 , Fig.15 and Fig.16 In an embodiment of the present invention, the fueling gun guide rail 300 is provided with a guide channel 340 passing through opposite ends, and the guide channel 340 is connected to the first outlet; wherein, along the first inlet to the first outlet, the opening of the guide channel 340 at one end close to the first inlet is larger than the opening of the guide channel 340 at the other end close to the first outlet, which can reduce the friction between the fueling gun and the inner wall of the fueling gun guide rail 300, reduce the loss, and reduce the deflection that may occur during the insertion process, ensuring that the fueling gun remains stable during operation, operates smoothly, and prevents swinging or loosening, thereby improving the safety and efficiency of the refueling operation.

[0146] Specifically, refer to Fig.11 , Fig.15 as well as Fig.18 In the embodiment of the present invention, at least one fixing structure 160 is provided on the auxiliary gate housing 100, and at least one elastic locking structure 350 is provided on the outer side wall of the fuel gun guide rail 300. The elastic locking structure 350 extends radially. Under the action of external force, the elastic locking structure 350 has a tendency to fit together with the outer side wall of the fuel gun guide rail 300; wherein, the elastic locking structure 350 corresponds to the fixing structure 160 to limit the rotation of the fuel gun guide rail 300 relative to the auxiliary gate housing 100, which can ensure that the fuel gun guide rail 300 maintains a fixed position and direction during use, prevents accidental rotation or movement, and improves the accuracy and safety of operation.

[0147] It is understandable that, referring to Fig.11 , Fig.15 as well as Fig.18 In the embodiment of the present invention, the elastic positioning structure 350 is an elastic member, one end of which is connected to the outer side wall of the fueling gun guide rail 300, and the other end of the elastic member is spaced from the outer side wall. With the above structure, the presence of the elastic member simplifies the installation process, reduces the difficulty, and improves the accuracy, so that the installation of the entire fueling gun guide rail 300 and the auxiliary gate housing 100 is smoother and more reliable; due to the flexible characteristics of the elastic member, it can reduce the transmission of vibration between the fueling gun guide rail 300 and the housing, thereby reducing the impact of noise and vibration on the surrounding environment and users.

[0148] Specifically, refer to Fig.11 , Fig.15 as well as Fig.18In the embodiment of the present invention, the elastic member includes a connecting portion 351 and a curved portion 352, one end of the connecting portion 351 is connected to the outer side wall of the fuel gun rail 300, and the other end of the connecting portion 351 is connected to the curved portion 352. With the above arrangement, one end of the connecting portion 351 is connected to the outer side wall of the fuel gun rail 300, which can provide a solid connection point to ensure that the fuel gun rail 300 is firmly installed on the fixed structure 160 of the auxiliary gate housing 100; the design of the curved portion 352 makes the elastic member have a certain flexibility and elasticity, which can absorb vibration and impact from the outside, reduce the impact of vibration on the fuel gun rail 300 and the auxiliary gate housing 100, and improve the stability and durability of the entire auxiliary gate unit; the elastic deformation of the curved portion 352 can adjust the alignment of the fuel gun rail 300 to a certain extent, so that it can be more accurately installed on the auxiliary gate housing 100, reducing the deviation that may occur during the installation process.

[0149] It should be noted that, in the embodiment of the present invention, the above-mentioned fixed structure 160 is a fixed opening that passes through the inside and outside of the auxiliary gate housing 100, and the bent portion 352 is inserted into the fixed opening, which is convenient for the assembler to observe the assembly status and to apply pressure to the bent portion 352 through the fixed opening. The bent portion 352 is elastically deformed to facilitate the disassembly and assembly of the fuel gun guide rail 300, and the operation is more convenient.

[0150] Specifically, in an embodiment of the present invention, the elastic member is an elastic plate body integrally formed with the guide rail body, which has a more secure connection and is less likely to loosen or fall off, thereby improving the reliability of the connection; it has better durability and can maintain its elasticity and bending properties for a longer time, thereby extending its service life; the installation process may be simpler and quicker, and no additional connecting parts or steps are required.

[0151] Specifically, in the embodiment of the present invention, there are two elastic locking structures 350, and the two elastic locking structures 350 are spaced apart on the outer side wall of the guide rail body to improve the reliability and stability of positioning. It can be understood that there are also two fixed structures 160, and the number of fixed structures 160 is adapted to the number of elastic locking structures 350. In some embodiments, there can also be one, three, etc. elastic locking structures 350, which are not limited here.

[0152] Specifically, refer to Fig.15 and Fig.16 In an embodiment of the present invention, a guiding curved surface 341 is provided on the inner side wall of the guiding channel 340, and the guiding curved surface 341 includes a first arc segment 3411, a second arc segment 3412 and a guiding segment 3413 which are sequentially connected; wherein the angles between the first arc segment 3411, the second arc segment 3412 and the center line of the guiding channel 340 are both acute angles, and the guiding segment 3413 is parallel to the center line of the guiding channel 340.

[0153] With the above structure, the acute angle design of the first arc segment 3411 and the second arc segment 3412 enables the fuel gun to smoothly pass through these curved surfaces during the insertion process, reducing the resistance and friction that may be encountered during insertion; the guide segment 3413 is parallel to the center line of the guide channel 340, ensuring the precise guidance of the fuel gun during the insertion process, avoiding deviation or skew, so that the fuel gun can accurately enter the target position. Therefore, the design of the guide curved surface 341 helps to firmly lock the fuel gun in the correct position, avoiding possible shaking or displacement during the refueling process, and ensuring the stability and safety of the fuel gun.

[0154] It is understandable that, referring to Figure 4 , Figure 5 , Fig.11 and Fig.18 In the embodiment of the present invention, a water guide structure 170 is provided on the outer wall of the auxiliary gate housing 100. The water guide structure 170 is located at the lower side of the drain outlet 120. The water guide structure 170 is used to guide the water body to flow to the preset position. With the above structure, the design of the water guide structure 170 helps to guide the water body from the lower side of the drain outlet 120 to the preset position, prevents the water flow from overflowing or flowing to an inappropriate area, and improves the controllability and diversion of the water flow; it can make the water flow effectively flow to the target position, accelerate the drainage process, improve the drainage efficiency, thereby reducing the drainage time, and can also effectively prevent water accumulation, reducing the adverse effects of the water flow on the structure and the surrounding environment.

[0155] Specifically, in the embodiment of the present invention, the width of the water guide structure 170 is greater than the width of the drain port 120, which improves the drainage capacity and stability and ensures the normal operation and efficiency of the drainage system. Specifically, referring to the figure, in the embodiment of the present invention, the upper side wall of the water guide structure 170 is provided with a guide slope 171 for guiding the water body, so that the water flow is drained faster, thereby improving the drainage efficiency of the drainage system.

[0156] Specifically, refer to Figure 4 , Fig.11 and Fig.18 In the embodiment of the present invention, the auxiliary gate housing 100 is provided with a plurality of buckle structures 180, and the plurality of buckle structures 180 surround the side wall of the auxiliary gate housing 100 and are arranged at intervals. During assembly, the auxiliary gate housing 100 is installed on the vehicle body near the fuel tank through the buckle structure 180, which enhances the stability and firmness of the overall structure. It can be understood that in the embodiment of the present invention, the plurality of buckle structures 180 are symmetrically arranged. This makes the force more evenly distributed, reduces the situation of excessive local force, and is conducive to extending the service life of the auxiliary gate housing.

[0157] Specifically, refer to Figures 13 to 15In the embodiment of the present invention, the end wall of the auxiliary gate housing 100 is provided with a guiding slope 190, and the guiding slope 190 is arranged around the first inlet. Through the above structure, the design of the guiding slope 190 arranged around the first inlet can effectively guide the insertion of the refueling gun, improve the insertion accuracy and operation convenience, and reduce the possible damage risk, thereby optimizing the efficiency and safety of the refueling operation.

[0158] It is understandable that, referring to Figure 5 and Fig.11 In the embodiment of the present invention, the auxiliary gate unit includes a first sealing ring 510, which is located between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110, and the first sealing ring 510 is sleeved on the outer wall of the fueling gun rail 300, and the first sealing ring 510 is used to seal the gap between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110; wherein, the first sealing ring 510 is located between the first inlet and the drain port 120 to cut off the communication between the first inlet and the drain port 120. With the above structure, the first sealing ring 510 is arranged between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110, filling the gap between the two and enhancing the sealing effect; since the first sealing ring 510 is located between the first inlet and the drain port 120, it realizes the isolation between the two positions, preventing the liquid from flowing back to the first inlet during drainage.

[0159] It is understandable that, referring to Figure 5 and Fig.15 In the embodiment of the present invention, an annular protrusion is provided on the fueling gun guide rail 300, and the annular protrusion is located at one end of the fueling gun guide rail 300 close to the first outlet, and the annular protrusion is arranged around the end opening of the fueling gun guide rail 300; the annular protrusion is inserted and circumferentially positioned with a part of the structure close to the second inlet on the main cover unit; the fueling device includes a second sealing ring 520, a part of the structure of the second sealing ring 520 is sleeved and matched with the annular protrusion, and another part of the structure of the second sealing ring 520 is abutted and matched with the main cover unit, so as to seal the connection between the first outlet and the second inlet. Through the above structure, a part of the structure of the second sealing ring 520 is sleeved and matched with the annular protrusion, and the other part of the structure is abutted and matched with the main cover unit, so as to ensure that the sealing of the connection between the first outlet and the second inlet is reliable, and has an excellent sealing structure, which inhibits the leakage of fuel vapor to the outside of the fuel tank.

[0160] It should be noted that, in the above embodiment, the first sealing ring 510 is a sealing rubber ring, and the second sealing ring 520 is a foam sealing ring. The foam sealing ring has good sealing performance, can fill and close irregular or incompletely fitting surfaces, and effectively prevent the penetration and leakage of gas or liquid. The foam sealing ring has a certain elasticity and softness, and can play a buffering and shock-absorbing effect under vibration or impact, thereby protecting components from damage.

[0161] It can be understood that in the embodiment of the present invention, the overall assembly process of the above-mentioned refueling device is as follows: during installation, the main cover unit and the auxiliary gate unit are both installed at the refueling port of the automobile, the auxiliary gate unit cover is arranged on part of the structure of the main cover unit, the main cover unit is inserted into the refueling pipe of the fuel tank, and the auxiliary gate unit cover is installed on the body of the automobile.

[0162] It should be noted that a guide groove is provided in the auxiliary gate chamber 110 of the auxiliary gate shell 100 of the above-mentioned auxiliary gate unit, and a guide protrusion is provided in the main cover shell 600 of the main cover unit, which cooperates with the guide groove to assemble the auxiliary gate shell 100 and the main cover shell 600.

[0163] It can be understood that in the embodiment of the present invention, the use process of the above-mentioned refueling device is as follows: the refueling gun pushes the gate structure 200 to open the first inlet of the auxiliary gate unit, and the refueling gun passes through the gate bracket 210 and the refueling gun guide rail 300 in sequence. Then, the refueling gun pushes the valve structure to open the second inlet, and the refueling gun is inserted into the main cover channel 610 of the main cover shell 600 and the guide channel 710 of the guide shell 700, and abuts and cooperates with the limiting structure 730, and then refueling is carried out.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deflector for a main cover unit, characterized in that: include: A flow guide housing (700), the flow guide housing (700) is inserted into the refueling pipe, the flow guide housing (700) is provided with a flow guide channel (710), the flow guide channel (710) is used for inserting the refueling gun and guiding the oil; An elastic positioning structure (750) is arranged on the outer wall of the flow guide housing (700), and the elastic positioning structure (750) is used to abut against the fuel filling pipe to limit the relative installation position of the flow guide housing (700) and the fuel filling pipe; The elastic positioning structure (750) can follow the movement of the flow guide housing (700) and can adaptively adjust its relative angle with the outer wall of the flow guide housing (700); The flow guide housing (700) is provided with a notch (760), the notch (760) is arranged on the side wall of the flow guide housing (700) along a first direction, and the notch (760) extends to an end surface of the flow guide housing (700) corresponding to an outlet end of the flow guide channel (710) and is arranged in communication therewith; The two side walls of the flow guide housing (700) corresponding to the notch (760) have a first wall thickness (771), a second wall thickness (772) and a third wall thickness (773); the first wall thickness (771) is adjacent to the side of the notch (760); the second wall thickness (772) is located between the first wall thickness (771) and the third wall thickness (773); and the thicknesses of the first wall thickness (771) and the third wall thickness (773) are both smaller than the second wall thickness (772); the thickness of the first wall thickness (771) gradually increases toward the second wall thickness (772); and the third wall thickness (773) gradually decreases away from the second wall thickness (772); When an external force acts on the side wall of the flow guide housing (700) corresponding to the second wall thickness (772), the outer diameter of the side wall of the flow guide housing (700) corresponding to the outlet end of the flow guide channel (710) is reduced.

2. The deflector for the main cover unit according to claim 1, characterized in that: The elastic positioning structure (750) comprises an elastic positioning member, which is arranged on the outer wall of the flow guide shell (700) along a first direction, and there is a deformation distance between the elastic positioning member and the outer wall of the flow guide shell (700). When the elastic positioning member is subjected to an external force, the elastic positioning member tends to fit into the outer wall of the flow guide shell (700).

3. The deflector for the main cover unit according to claim 2, characterized in that: The elastic positioning member comprises a connecting section (751) and a positioning section (752); one end of the connecting section (751) is connected to the outer wall of the flow guide housing (700), and the other end of the connecting section (751) opposite to the positioning section (752); The connecting section (751) is arranged obliquely relative to the center line of the flow guide channel (710), and the positioning section (752) abuts against the inner wall of the fuel filling pipe to limit the relative installation positions of the flow guide housing (700) and the fuel filling pipe.

4. The deflector for the main cover unit according to claim 2, characterized in that: The elastic positioning member is an elastic plate body integrally formed with the flow guide housing (700).

5. The deflector for the main cover unit according to claim 1 or 3, characterized in that: There are two elastic positioning structures (750), and the two elastic positioning structures (750) are arranged at intervals on the outer wall of the flow guide housing (700).

6. The deflector for the main cover unit according to claim 1, characterized in that: The flow-guiding housing (700) is provided with a flow-guiding gas concave edge, the flow-guiding gas concave edge penetrates the inside and outside of the flow-guiding channel (710), and the flow-guiding gas concave edge is in communication with the notch (760) so that gas circulates inside and outside the flow-guiding housing (700).

7. A main cover unit, characterized in that: include: The deflector for the main cover unit according to any one of claims 1 to 6; A main cover shell (600), the main cover shell (600) is connected to the flow guide shell (700), the main cover shell (600) is provided with a main cover channel (610), and the main cover channel (610) is communicated with the flow guide channel (710).

8. A capless refueling device, characterized in that: include: The main cover unit as claimed in claim 7; A secondary gate unit, the main cover unit and the secondary gate unit are fixedly matched, the secondary gate unit is provided with a secondary gate chamber (110), and the secondary gate chamber (110) is docked with and communicated with the main cover channel (610).

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