Valve structure, 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 valve structure, a main cover unit and a coverless refueling device, the valve structure comprising a lower cover, an upper cover and a valve body assembly, the upper cover and the lower cover are detachably connected, the upper cover and the lower cover cooperate to form a pressure relief channel, the valve body assembly is detachably arranged between the lower cover and the upper cover, and the valve body assembly has a closed state and a pressure relief state; when the external pressure applied to the valve body assembly is less than a preset threshold value, the valve body assembly cuts off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel; when the external pressure applied to the valve body assembly is greater than the preset threshold value, the cut-off between the relative pressure inlet end and the pressure relief end of the pressure relief channel is released, thereby improving manufacturing accuracy, controlling the structural size to be reduced, and reducing manufacturing difficulty; the automatic response mechanism is beneficial to the refueling device not being damaged or dangerous when the pressure is too high, providing safety protection, and having a reasonable design and convenient operation.

Description

Technical Field

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

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

[0003] The refueling device of the related art is opened or closed by a valve structure. However, the valve structure has a single function, a complex structure and is difficult to manufacture. Summary of the Invention

[0004] The present invention provides a valve structure for solving the problems in the related art of the valve structure of a capless refueling device having a single function, a complex structure and great difficulty in manufacturing.

[0005] The present invention provides a valve structure for a capless refueling device, comprising:

[0006] lower cover;

[0007] An upper cover, the upper cover is detachably connected to the lower cover, and the upper cover and the lower cover cooperate to form a pressure relief channel;

[0008] a valve body assembly detachably disposed between the lower cover and the upper cover, the valve body assembly being used to cut off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel, the valve body assembly having a closed state and a pressure relief state;

[0009] When the valve body assembly is in the closed state, the external pressure applied to the valve body assembly is less than a preset threshold value, and the valve body assembly abuts against the lower cover to cut off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel;

[0010] When the external pressure applied to the valve body assembly is greater than a preset threshold value, the valve body assembly is separated from the lower cover, the valve body assembly is in a pressure relief state, and the valve body assembly releases the isolation between the pressure inlet end and the pressure relief end relative to the pressure relief channel.

[0011] According to a valve structure provided by the present invention, the lower cover is provided with a lower chamber, the upper cover is provided with an upper chamber, the lower cover and the upper cover are detachably nested and fixed, and the lower chamber and the upper chamber cooperate to form a valve body chamber, the valve body assembly is movably installed in the valve body chamber, a distance is provided between the two opposite end surfaces of the upper cover and the lower cover to form a pressure relief gap, the lower cover is provided with a pressure inlet hole, the pressure inlet hole passes through the bottom wall of the lower chamber, the pressure relief gap, the valve body chamber and the pressure inlet hole are sequentially connected to form the pressure relief channel;

[0012] Wherein, when the valve body assembly is in the closed state, the external pressure applied to the valve body assembly is less than a preset threshold value, the valve body assembly abuts against the bottom wall of the lower chamber, and blocks the pressure inlet hole;

[0013] When the external pressure applied to the valve body assembly is greater than a preset threshold value, the valve body assembly is separated from the bottom wall of the lower chamber, the valve body assembly avoids the pressure inlet hole, and the valve body assembly is in a pressure relief state.

[0014] According to a valve structure provided by the present invention, the valve body assembly includes:

[0015] The valve body is movably arranged in the valve body chamber, and the valve body is provided with a valve body sealing layer.

[0016] The cross-sectional area of ​​the valve body sealing layer is larger than the cross-sectional area of ​​the pressure inlet hole, so as to be used for sealing the pressure inlet hole;

[0017] A valve body reset component, one end of which is mounted on the upper cover, and the other end of which is mounted on the valve body, wherein the valve body reset component is used to drive the valve body to abut against the bottom wall of the valve body chamber.

[0018] According to a valve structure provided by the present invention, the valve body is provided with a mounting cavity, the bottom wall of the upper chamber is provided with a mounting protrusion, the valve body reset member is a spring, one end of the spring abuts against the mounting cavity, and the other end of the spring is sleeved on the mounting protrusion.

[0019] According to a valve structure provided by the present invention, the valve body sealing layer includes a sealing body and a mounting column connected to the sealing body, and the mounting column has a clamping section and a limiting section;

[0020] The bottom wall of the mounting cavity is provided with a mounting hole, and the mounting column is passed through the mounting hole, wherein the clamping section corresponds to the mounting hole, and the limiting section is located inside the mounting cavity. 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 to limit the valve body sealing layer from being separated from the valve body.

[0021] According to a valve structure provided by the present invention, the upper cover is provided with a first annular plug-in boss, the first plug-in boss is arranged around the upper chamber, a first plug-in gap is defined between the outer side wall of the first plug-in boss and the outer peripheral wall of the upper cover, and an assembly protrusion is provided on the outer side wall of the first plug-in boss, the assembly protrusion being located within the first plug-in gap;

[0022] The lower cover is provided with a second annular plug-in boss, the second plug-in boss is arranged around the lower cavity, and a second plug-in gap is provided between the outer side wall of the second plug-in boss and the lower cavity, the second plug-in boss is provided with an assembly arm, and the assembly arm is provided with an assembly hole;

[0023] In which, the first plug-in boss is inserted into the second plug-in gap, there is a distance between the end face of the first plug-in boss and the bottom wall of the lower cover, the second plug-in boss is arranged corresponding to the second plug-in gap, and the assembly arm is inserted into the second plug-in gap, the assembly hole is snap-fitted with the assembly protrusion to limit the back-to-back movement of the lower cover and the upper cover in the first direction.

[0024] According to a valve structure provided by the present invention, an arc-shaped pushing concave surface is provided on an end surface of the upper cover facing away from the lower cover. The pushing concave surface is used to adapt to the refueling gun and can position the refueling gun.

[0025] The present invention also provides a main cover unit, including a main cover shell and the above-mentioned valve structure, the main cover shell is provided with a main cover channel, the main cover shell is provided with a main shaft and a main cover spring, the main cover spring is sleeved on the main shaft, the valve structure is rotatably connected to the main shaft, and the main cover spring is used to drive the valve structure to rotate to close the preset position of the main cover channel.

[0026] According to a main cover unit provided by the present invention, the main cover shell is provided with a first through opening and a second through opening, the main shaft has a limit head and a mounting shaft portion connected to the limit head, the mounting shaft portion is plug-fitted into the main cover shell, the limit head is located in the first through opening, and an end of the mounting shaft portion away from the limit head is located in the second through opening;

[0027] Wherein, the main cover shell is provided with a stopping structure, and the stopping structure is used to limit the movement of the main shaft relative to the main cover shell.

[0028] The present invention also provides a capless refueling device, comprising:

[0029] the main cover unit;

[0030] Auxiliary gate unit, the main cover unit is fixedly matched with the auxiliary gate unit, the auxiliary gate unit is provided with an auxiliary gate chamber, and the auxiliary gate chamber is docked with and communicated with the main cover channel.

[0031] The valve structure provided by the present invention adopts an upper structure, wherein the upper cover and the lower cover are detachably connected, and the valve body assembly is detachably arranged between the upper cover and the lower cover, which means that the three are a split structure. This not only ensures the movement and force-bearing function of the valve structure and improves the manufacturing precision, but also controls the size of the structure to be reduced, reduces the manufacturing difficulty, and makes transportation and installation feasible, thereby achieving the purpose of reducing costs. It has good practical application value and promotion value. The pressure relief channel in the valve structure, when the valve structure is subjected to pressure exceeding the preset threshold, the valve body assembly automatically enters the pressure relief state. The valve body assembly will switch from the closed state to the pressure relief state, thereby releasing excessive pressure. The automatic response mechanism is beneficial to the capless refueling device not being damaged or dangerous when the pressure is too high, providing safety protection, facilitating the adjustment and flexible operation of the valve structure, and is rich in functions, rational in design, and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to 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 any creative work.

[0033] Figure 1 It is an overall schematic diagram of the capless refueling device provided by the present invention;

[0034] Figure 2 is a schematic cross-sectional view of the capless refueling device provided by the present invention;

[0035] Figure 3 It is a structural schematic diagram of the main cover unit provided by the present invention;

[0036] Figure 4 is an exploded schematic diagram of the main cover unit provided by the present invention;

[0037] Figure 5 It is an exploded schematic diagram of the valve structure provided by the present invention;

[0038] Figure 6 is a cross-sectional schematic diagram of the valve structure provided by the present invention;

[0039] Figure 7 It is a structural schematic diagram of the main cover shell provided by the present invention;

[0040] Figure 8 1 is a schematic structural diagram of the flow deflector provided by the present invention;

[0041] Figure 9 It is a cross-sectional schematic diagram of the deflector provided by the present invention.

[0042] Figure 10 1 is an exploded schematic diagram of the auxiliary gate unit provided by the present invention;

[0043] Figure 11 It is a structural schematic diagram of the gate structure provided by the present invention;

[0044] Figure 12 This is a first-perspective exploded schematic diagram of the gate structure provided by the present invention;

[0045] Figure 13 This is a second perspective exploded schematic diagram of the gate structure provided by the present invention;

[0046] Figure 14 This is a schematic structural diagram of the fueling gun guide rail provided by the present invention;

[0047] Figure 15 1 is a schematic cross-sectional view of the fueling gun guide rail provided by the present invention;

[0048] Figure 16 yes Figure 15 A schematic diagram of the structure at center A;

[0049] Figure 17 It is a structural schematic diagram of the auxiliary gate housing provided by the present invention.

[0050] Reference numerals:

[0051] 100, auxiliary gate housing; 110, auxiliary gate chamber; 120, drain outlet; 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;

[0052] 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 portion; 230, gate reset member; 231, screw rod segment; 232, drive rod segment;

[0053] 300, fuel gun guide rail; 310, drainage channel; 321, fixing channel; 322, second mounting groove; 3221, second protrusion; 323, insertion 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, curved portion;

[0054] 400, blocking mechanism; 410, elastic plate; 411, elastic blocking area; 412, folding plate; 420, rubber component; 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 opening; 640, second opening; 650, stop structure; 661, first annular step; 662, second annular step; 663, third annular step; 670, connecting protrusion; 681, first insertion recess; 682, first insertion protrusion; 691, insertion opening; 692, avoidance opening;

[0055] 700, deflector; 710, flow guide channel; 711, first straight section; 712, inclined guide section; 713, second straight section; 720, guide structure; 721, guide arc surface; 730, limiting structure; 731, limiting step; 740, flow 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 insertion recess; 7911, limiting boss; 792, second insertion protrusion;

[0056] 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. Mounting protrusion; 822. First plug-in boss; 823. Assembly protrusion; 824. Push concave surface; 825. Limiting end face; 830. Valve body assembly; 831. Valve body; 8311. Mounting concave cavity; 832. Valve body sealing layer; 8321. Sealing body; 8322. Mounting column; 833. Valve body reset member; 910. First gas circulation port; 920. Second gas circulation port. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0058] The following combination Figures 1-17 The valve structure, main cover unit and capless refueling device of the present invention are described. The capless refueling device comprises a secondary gate unit and a main cover unit.

[0059] Reference Figures 1 to 6 According to the present invention, a valve structure is provided for a capless refueling device, comprising: a lower cover 810; an upper cover 820, the upper cover 820 is detachably connected to the lower cover 810, and the upper cover 820 and the lower cover 810 cooperate to form a pressure relief channel; a valve body assembly 830, which is detachably arranged between the lower cover 810 and the upper cover 820, and the valve body assembly 830 is used to isolate the communication between the pressure inlet end and the pressure relief end of the pressure relief channel, and the valve body assembly 830 has a closed state and a pressure relief state; when 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, and the valve body assembly 830 abuts against the lower cover 810 to cut off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel; when the external pressure applied to the valve body assembly 830 is greater than the preset threshold value, the valve body assembly 830 separates from the lower cover 810, and the valve body assembly 830 is in a pressure relief state, and the valve body assembly 830 releases the isolation between the relative pressure inlet end and the pressure relief end of the pressure relief channel.

[0060] The valve structure provided by the present invention adopts an upper structure, wherein the upper cover 820 and the lower cover 810 are detachably connected, and the valve body assembly 830 is detachably arranged between the upper cover 820 and the lower cover 810, which means that the three are a split structure. This not only ensures the movement and force-bearing function of the valve structure and improves manufacturing precision, but also controls the size of the structure to be reduced, making the manufacturing difficulty lower and transport and installation feasible, thereby achieving the purpose of reducing costs and having good practical application value and promotion value. The pressure relief channel in the valve structure, when the valve structure is subjected to pressure exceeding a preset threshold, the valve body assembly 830 automatically enters a pressure relief state. The valve body assembly 830 will switch from a closed state to a pressure relief state, thereby releasing excess pressure. The automatic response mechanism is beneficial to prevent the capless refueling device from being damaged or dangerous when the pressure is too high, provides safety protection, and facilitates the adjustment and flexible operation of the valve structure. It is rich in functions, rational in design, and easy to operate.

[0061] It is understandable that, referring to Figures 1 to 7 According to the present invention, a main cover unit is also provided, including a main cover shell 600 and the above-mentioned valve structure, the main cover shell 600 is provided with a main cover channel 610, the main cover shell 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 to close the preset position of the main cover channel 610.

[0062] 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, and extend the life of the valve structure. The automatic closing function can also reduce the mechanical loss caused by the valve being open for a long time, and ensure that the main cover channel 610 can close 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.

[0063] Specifically, refer to Figures 1 to 7In the embodiment of the present invention, the lower cover 810 is provided with a lower chamber 811, and the upper cover 820 is provided with an upper chamber 821. The lower cover 810 and the upper cover 820 are detachably 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. There is a distance 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, which passes through the bottom wall of the lower chamber 811. The pressure relief gap The pressure 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 the 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.

[0064] With the above structure, under normal operating conditions, when the external pressure applied to the valve body assembly 830 is less than a preset threshold, the valve body assembly 830 abuts against the bottom wall of the lower chamber 811, blocking the pressure inlet hole 812, thereby preventing pressure from leaking from the pressure inlet hole 812. At this time, the valve 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. At this time, the valve 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 controlling and releasing the pressure. The automated adjustment mechanism reduces the need for manual intervention and improves safety and reliability.

[0065] Specifically, refer to Figure 5 and Figure 6 In an 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 upper cover, 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.

[0066] Through the above-mentioned arrangement, the valve body 831 is provided with a valve body sealing layer 832, whose cross-sectional area is larger than that 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 seal the pressure inlet hole 812, maintaining normal pressure operation inside the main cover unit, and 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 its initial closed position, increasing the stability of the entire valve structure and preventing the valve body 831 from becoming unstable due to external forces 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.

[0067] Specifically, refer to Figure 4 、 Figure 5 and Figure 6 In this embodiment of the present invention, the valve body 831 is provided with a mounting cavity 8311, and the bottom wall of the upper chamber 821 is provided with a mounting protrusion 8211. The valve body reset member 833 is a spring, one end of which abuts the mounting cavity 8311, and the other end of which is sleeved on the mounting protrusion 8211. Through this arrangement, the spring can generate an elastic force when the valve body 831 moves. 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, and ensuring the sealing effect of the pressure inlet hole 812. The design of the entire structure provides stable force transmission and reset effects, helping 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 friction and impact between the valve body 831 and other components, thereby extending the service life of the valve body assembly 830.

[0068] It is understandable that, referring to Figure 4 、 Figure 5 and Figure 6In the embodiment of the present invention, the valve body sealing layer 832 includes a sealing main body 8321 and an installation column 8322 connected to the sealing main body 8321, and the installation column 8322 has a clamping section and a limiting section; the bottom wall of the installation cavity 8311 is provided with a mounting hole, and the installation column 8322 is passed through the mounting hole, wherein the clamping section corresponds to the mounting hole, and the limiting section is located inside the installation cavity 8311, and the cross-sectional area of ​​the limiting section is larger than the cross-sectional area of ​​the mounting hole. The lower end surface of the limiting section abuts against the upper surface of the bottom wall of the installation cavity 8311 to limit the valve body sealing layer 832 from being separated from the valve body main 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 installation column 8322 and the limiting section improves the fixation of the valve body sealing layer 832 on the valve body main body 831, and enhances the overall structural strength and durability of the entire valve structure.

[0069] It should be noted that in this embodiment of the present invention, the valve body sealing layer 832 is a resilient rubber seal that can adapt to surface irregularities of the valve body 831, effectively improving 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 are not limited here. Furthermore, the valve body reset member 833 can also be an elastic sheet, elastic column, etc., which are not limited here.

[0070] It is understandable that, referring to Figure 4 、 Figure 5 and Figure 6 In 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 aligned with the lower chamber. 811, a second plug-in gap is provided between the second plug-in boss 813 and the assembly arm 814, and an assembly hole 8141 is provided on the assembly arm 814; wherein, the first plug-in boss 822 is inserted in the second plug-in gap, and there is a distance 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 back-to-back movement of the lower cover 810 and the upper cover 820 in the first direction.

[0071] 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 a 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 snap-fitted with each other. This design can limit the back movement between the upper cover 820 and the lower cover 810 in the first direction. That is to say, the upper cover 820 and the lower cover 810 will not detach or move 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, and it is only necessary to match the first plug-in boss 822 and the second plug-in boss 813, and engage the assembly hole 8141 with the assembly protrusion 823 to complete the assembly, which can improve the assembly efficiency; 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.

[0072] Specifically, refer to Figures 3 to 6 In this embodiment of the present invention, an arc-shaped push-in concave surface 824 is provided on one end of the upper cover 820 facing away from the lower cover 810. Push-in concave surface 824 is used to mate with the fuel gun and position the fuel gun. Through this arrangement, the design of push-in concave surface 824 enables the fuel gun to mate with the upper cover 820, ensuring that the fuel gun can be correctly inserted and connected to the fuel tank, thereby improving the smoothness and efficiency of the refueling operation. Push-in concave surface 824 not only allows the fuel gun to fit into the correct position but also allows for proper positioning of the fuel gun. The shape and position of push-in concave surface 824 allow the fuel gun to be accurately positioned on the upper cover 820, ensuring that the fuel port and fuel gun are correctly connected during refueling and avoiding operational errors. With push-in concave surface 824, the refueling operation becomes more convenient and simple. Simply inserting the fuel gun into the position where push-in concave surface 824 is located completes correct positioning and connection without the need for additional adjustments or operations, thereby improving the convenience of the refueling process and the user experience.

[0073] Specifically, refer to Figures 3 to 6In 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.

[0074] 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.

[0075] It is understandable that, referring to Figures 3 to 6 In this embodiment of the present invention, a main cover sealing layer 550 is disposed between the upper cover 820 and the lower cover 810. When the valve structure closes the main cover passage 610, the main cover sealing layer 550 is configured to seal the valve structure and the main cover passage 610. With this structure, when the valve structure closes the main cover passage 610, the main cover sealing layer 550 acts as a sealing device, ensuring the tightness of the main cover passage 610 after the valve structure is closed, improving reliability and suppressing the leakage of fuel vapor out of the fuel tank. Furthermore, the main cover sealing layer 550 not only prevents leakage but also reduces friction and wear between the valve structure and the main cover passage 610, thereby improving durability, extending service life, and reducing the frequency of repairs and replacements.

[0076] 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, simple 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 simpler, and the main cover sealing layer 550 can be easily disassembled and replaced without tedious operating steps, thereby reducing the difficulty and cost of maintenance.

[0077] Specifically, refer to Figures 3 to 6In the embodiment of the present invention, an assembly groove 815 and a support end surface 816 are provided on the end of the lower cover 810 facing the upper cover 820. The assembly groove 815 and the support end surface 816 surround the second plug-in boss 813 in sequence from the inside to the outside. A limiting end surface 825 is provided on the end of the upper cover 820 facing the lower cover 810. The support end surface 816 and the assembly groove 815 are both spaced apart from the limiting end surface 825, and the assembly groove 815 and the limiting end surface 825 are correspondingly arranged; wherein, the main cover sealing layer 550 has 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 in contact with the support end surface 816. The distance between the limiting end surface 825 and the upper edge of the side wall of the assembly groove 815 is less than the thickness of the assembly section 551.

[0078] 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 attached to the support end face 816. The above structural design provides 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 precise positioning in the assembly groove 815, enhance the reliability of the valve structure, and reduce problems that may occur due to 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, saves space, is suitable for various application scenarios, and the installation process is simple and convenient. During maintenance, due to the clear structure, it is also easier to disassemble and replace the main cover sealing layer 550, which also protects the interior of the main cover unit from the influence of the external environment and improves stability and durability.

[0079] It should be noted that in this embodiment of the present invention, the main cover sealing layer 550 is a sealing rubber gasket. Sealing materials typically exhibit excellent elasticity and durability, maintaining their sealing properties over extended periods without becoming susceptible to damage or aging. Furthermore, the sealing rubber gasket exhibits corrosion resistance, high temperature resistance, and chemical resistance, making it suitable for sealing requirements in a variety of environments and operating conditions. Therefore, using a sealing rubber gasket as the primary sealing layer effectively ensures the sealing of the main cover channel 610 and the valve structure, improving reliability.

[0080] It is understandable that, referring to Figures 1 to 4 as well as Figure 8 and Figure 9In an embodiment of the present invention, the main cover unit further includes a flow deflector 700. The flow deflector 700 is connected to the main cover housing 600 and is provided with a flow guide channel 710. The flow guide channel 710 communicates with the main cover channel 610 to form a main cover chamber. The opposite ends of the main cover chamber are respectively a second inlet and a second outlet. The main cover chamber is used to guide the fueling gun into refueling and limit the insertion stroke of the fueling gun. It should be noted that the second inlet is an opening at one end of the main cover channel 610 of the main cover housing 600, and the second outlet is an opening at the other end of the flow deflector 700 opposite the flow guide channel 710.

[0081] It is understandable that, referring to Figures 2 to 4 In an embodiment of the present invention, the main cover unit is provided with a gas circulation structure, which runs through the interior and exterior of the main cover chamber; the gas circulation structure includes a first gas circulation port 910 and a second gas circulation port 920. The first gas circulation port 910 is opened between the side wall of the main cover shell 600 and the deflector 700, and the second gas circulation port 920 is opened on the other opposite side wall of the main cover shell 600. This further fully regulates the pressure, can more evenly distribute the gas flow, reduce possible local gas pressure or temperature changes, thereby optimizing the gas circulation structure and improving flexibility, stability and safety.

[0082] It should also be noted that, in this embodiment of the present invention, the valve structure closes the main cover chamber at a position higher than the position of the gas circulation structure on the main cover housing 600. When the main cover chamber needs to be closed, the valve structure effectively prevents gas from leaking from the main cover chamber to the external environment, helping to maintain the gas pressure and composition within the main cover chamber stable. This can also reduce interference with the gas circulation structure from the valve structure. When the valve structure requires operation or maintenance, it will not affect the gas circulation structure, ensuring normal operation.

[0083] Specifically, refer to Figures 2 to 4 In this embodiment of the present invention, a main cover sealing ring 560 is sleeved on the outer wall of the main cover housing 600. In a first direction, the main cover sealing ring 560 is positioned on the main cover housing 600 above the position where the valve structure closes the main cover chamber. This arrangement allows the main cover sealing ring 560 to be positioned higher when the main cover passage 610, i.e., the main cover chamber, is closed. This helps improve the sealing performance between the fuel filler pipe and the main cover housing 600, effectively preventing gas or liquid from leaking from the main cover chamber to the external environment, maintaining airtightness, and reducing the risk of damage or accidental destruction of the main cover sealing ring 560.

[0084] Specifically, refer to Figure 3 、 Figure 4 and Figure 7In an embodiment of the present invention, the inner sidewall 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 a first direction, the first annular step 661, the second annular step 662, and the third annular step 663 form a stepped structure that descends sequentially from the outside to the inside. The centerline of the first annular step 661 coincides with the centerline of the main cover chamber, while the second annular step 662 and the third annular step 663 are both offset from the centerline of the main cover chamber. This structure allows one side of the stepped structure to be wider than the other side, thereby providing a mounting position for the main shaft 530 and the main cover spring 540 and preventing them from being blocked and damaged, thus providing a protective effect.

[0085] It is understandable that, referring to Figure 4 、 Figure 5 、 Figure 8 and Figure 9 In an embodiment of the present invention, the deflector 700 is provided with a guide structure 720 and a limiting structure 730. The guide structure 720 is located in the guide channel 710. The guide structure 720 is used to guide the insertion of the refueling gun. The limiting structure 730 is located in the guide channel 710. The upper end surface of the limiting structure 730 and the upper end surface of the insertion end of the guide channel 710 on the deflector 700 have an avoidance spacing; wherein, the refueling gun is guided to a position abutting against the limiting structure 730 by the guide structure 720 to limit the insertion stroke of the refueling gun, thereby preventing damage to the deflector 700 or the refueling gun, so as to facilitate the diversion of oil and ensure the accuracy and safety of the refueling operation.

[0086] It is understandable that, referring to Figure 8 and Figure 9 In the embodiment of the present invention, the guide structure 720 is a guide boss. A guide arc surface 721 is provided on a side wall of the guide boss facing the center of the guide channel 710. The distance between the guide arc surface 721 and the inner side wall of the deflector 700 gradually increases from the insertion end of the guide channel 710 to the outlet end of the guide channel 710. Through the above arrangement, the function 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 guide channel 710; and the distance between the guide arc surface 721 on the guide boss and the inner side wall of the deflector 700 gradually increases from the insertion end to the outlet end of the guide channel 710, in order to gradually relax the restrictions on the insertion angle and position of the fuel gun during the insertion process, ensuring that the fuel gun can be smoothly inserted into the guide channel 710.

[0087] It is understandable that, referring to Figure 8 and Figure 9In this embodiment of the present invention, a concave stopper step 731 is provided on a side wall of the stopper structure 730, facing the center of the flow guide channel 710. When the fueling nozzle is inserted, it abuts against the stopper step 731, providing a reference point or structure to limit the insertion depth, ensuring that the fueling nozzle is inserted into the correct position in the flow guide channel 710. This structure is simple, stable, and reliable.

[0088] Specifically, refer to Figure 8 and Figure 9 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 during insertion, which can simplify the operation process and make it easier for refueling personnel to understand and master 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.

[0089] Specifically, refer to Figure 8 and Figure 9 In this embodiment of the present invention, the limiting structure 730 is a limiting boss 620, which is arranged along the length of the deflector 700. The upper end surface of the limiting boss 620 is spaced apart from the upper end surface of the deflector 700 corresponding to the insertion end of the guide channel 710. The lower end surface of the limiting boss 620 extends to the lower end surface of the deflector 700 corresponding to the outlet end of the guide channel 710. This spacing provides sufficient space for the refueling gun to be inserted smoothly into the guide channel 710 without obstruction, ensuring smooth refueling operations. Specifically, in this embodiment of the present invention, multiple limiting structures 730 are provided, and these multiple limiting structures 730 are spaced apart and arranged relative to each other to improve the stability of the limiting structure. Specifically, in this embodiment of the present invention, the guide structure 720 is located between two adjacent limiting structures 730, further improving the stability of the limiting structure, effectively optimizing the refueling process and improving the safety and efficiency of the operation. Specifically, in this embodiment of the present invention, the inner diameter of the flow deflector 700 gradually decreases along a first direction from its insertion end to its outlet end. With this structure, the gradually decreasing inner diameter of the flow deflector 700 restricts and guides the flow of oil within the flow deflector 700, thereby improving the flow efficiency of the fluid.

[0090] It is also understandable that, with reference to Figure 8 and Figure 9In an embodiment of the present invention, the flow guide 700 is further provided with a flow-disrupting structure 740. The flow-disrupting structure 740 is located within the flow-distributing channel 710 and is used to slow down the outflow velocity of the oil at the outlet of the flow-distributing channel 710. The flow-disrupting structure 740 is provided on the inner wall of the flow-distributing channel 710 along the length of the flow guide 700. With this structure, the presence of the flow-disrupting structure 740 blocks the oil as it exits, thereby slowing down the velocity of the fluid passing through the outlet of the flow-distributing channel 710. This ensures a more stable and controllable flow of the fluid near the outlet, effectively reducing splashing and splattering during fluid outflow, helping to reduce energy consumption and fluid waste, and aligning with the principles of energy conservation and environmental protection.

[0091] Specifically, refer to Figure 8 and Figure 9 In this embodiment of the present invention, the spoiler structure 740 is a convex spoiler rib connected to the deflector 700. The rib protrudes toward the centerline of the flow guide channel 710. This configuration, by directly connecting the rib to the deflector 700 and protruding toward the centerline, enhances the stability and rigidity of the deflector 700, reduces vibration and deformation, and makes maintenance and cleaning more convenient, reducing the workload and time costs of maintenance personnel, thereby improving overall economic efficiency and sustainability.

[0092] Specifically, in this embodiment of the present invention, a gap exists between the lower end surface of the spoiler rib and the lower end surface of the outlet of the corresponding diversion channel 710 on the deflector 700. This allows the oil to converge within this gap and flow steadily into the fuel tank after being acted upon by the spoiler rib before entering the fuel tank. Specifically, in this embodiment of the present invention, a side wall of the spoiler rib facing the centerline of the diversion channel 710 is parallel to the centerline of the diversion channel 710, resulting in a simple structure and ease of manufacture.

[0093] Specifically, in an embodiment of the present invention, the spoiler rib and the deflector 700 are an integrated structure, and the spoiler rib can be directly manufactured as a part of the deflector 700, which simplifies the manufacturing and installation process, reduces the number of parts and assembly steps, and saves additional materials and manufacturing costs.

[0094] Specifically, in an embodiment of the present invention, there are multiple groups of flow-disturbing structures 740, which are spaced apart on the inner wall of the guide channel 710, helping to disperse the pressure of the oil fluid, improve energy efficiency, and improve flow stability and controllability.

[0095] Specifically, in this 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. The first straight section 711, the inclined guide section 712, and the second straight section 713 are sequentially arranged along the length of the flow guide 700. Through this 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 downstream and accelerate the flow velocity of the fluid, and the second straight section 713 is used to stabilize the flow of the fluid, thereby forming a stable flow state within the flow guide 700.

[0096] It is also understandable that, with reference to Figures 1 to 4 、 Figure 8 and Figure 9 In an embodiment of the present invention, an elastic positioning structure 750 is provided on the outer wall of the deflector 700. This elastic positioning structure 750 is used to abut against the fuel filler pipe to limit the relative installation position of the deflector 700 and the fuel filler pipe. The elastic positioning structure 750 can follow the movement of the deflector 700 and adaptively adjust its relative angle to the outer wall of the deflector 700. During installation, the deflector 700 is mounted on the fuel filler pipe. The elastic deformation and repositioning of the elastic positioning structure 750 restrict the final installation position of the deflector 700, reducing the difficulty and complexity of the installation process between the deflector 700 and the fuel filler pipe, making installation easier and more efficient. In some cases, for example, the elasticity of the elastic positioning structure 750 allows a small-diameter fuel filler pipe to expand in diameter, accommodating a variety of fuel filler pipe sizes.

[0097] It should be noted that the above-mentioned small-diameter fuel filler pipe can also be expanded in diameter. It can be understood that the relevant fuel filler 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 fuel filler 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 expanded small diameter part of the fuel filler pipe do not need to be welded, and can be processed and manufactured using a bobbin, thereby reducing the overall cost.

[0098] Specifically, refer to Figure 8 and Figure 9 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 deflector 700 along a first direction, and there is a deformation distance between the elastic positioning member and the outer wall of the deflector 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 deflector 700, which can ensure that the refueling pipe and the deflector 700 maintain a fixed position during installation, prevent accidental movement, and improve safety.

[0099] Specifically, refer to Figure 8 and Figure 9 In an 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 deflector 700, and the other opposite end of the connecting section 751 is connected to the positioning section 752. The connecting section 751 is tilted relative to the center line of the guide channel 710, and the positioning section 752 abuts against the inner wall of the fuel filler pipe to limit the relative installation position of the deflector 700 and the fuel filler pipe. Through the above-mentioned 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 an embodiment of the present invention, the elastic positioning member is an elastic plate body integrally formed with the deflector 700, which simplifies the manufacturing and installation process, reduces the number of parts and assembly steps, and saves additional materials and manufacturing costs.

[0100] Specifically, in this embodiment of the present invention, there are two elastic positioning structures 750, which are spaced apart on the outer wall of the deflector 700, thereby improving the installation stability of the fuel filler pipe and the deflector 700. Of course, the number of the elastic positioning structures 750 is not limited herein and can also be one, three, etc.

[0101] Specifically, refer to Figure 8 and Figure 9 In an embodiment of the present invention, the deflector 700 is provided with a notch 760. The notch 760 is arranged along a first direction on the sidewall of the deflector 700. The notch 760 extends to and is in communication with the end face of the deflector 700 corresponding to the outlet of the guide channel 710. When the sidewall of the deflector 700 corresponding to the outlet of the guide channel 710 is subjected to an external force, the sidewalls of the deflector 700 on opposite sides of the notch 760 move toward each other, thereby reducing the outer diameter of the sidewall of the deflector 700 corresponding to the outlet of the guide channel 710. With this structure, the outer diameter of the sidewall of the deflector 700 corresponding to the outlet of the guide channel 710 can be elastically reduced, allowing the deflector 700 to adapt to smaller-diameter refueling pipes. Furthermore, the notch 760 not only acts as a constriction but also cooperates with the gas circulation structure to assist gas circulation. Therefore, gas can flow not only through the outlet of the guide channel 710 but also through the notch 760.

[0102] Specifically, refer to Figure 8In an embodiment of the present invention, the two side walls of the deflector 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, and the second wall thickness 772 is located between the first wall thickness 771 and the third wall thickness 773. 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. When an external force acts on the side wall of the deflector 700 corresponding to the second wall thickness 772, the outer diameter of the side wall of the deflector 700 corresponding to the outlet end of the guide channel 710 is reduced. With the above structure, the gradient thickness design can provide appropriate elastic response under the action of external force. The outer diameter of the side wall of the guide channel 710 corresponding to the outlet end of the guide channel 710 on the guide 700 realizes elastic deformation, which is convenient for reducing the diameter, saving time and effort, and can adapt to some smaller diameter refueling pipes.

[0103] Specifically, in an embodiment of the present invention, the deflector 700 is provided with a gas guide concave edge, which passes through the inside and outside of the deflector channel 710 and is connected to the notch 760; the main cover shell 600 has a main cover gas concave edge, and the gas guide concave edge and the guide gas cooperate to form a first gas circulation port 910, so that the gas circulates inside and outside the deflector 700 and the main cover shell 600. The structure is simple and easy to manufacture.

[0104] It can also be understood, with reference to Figures , , , , , , and , that in an embodiment of the present invention, the main cover housing 600 and the deflector 700 are of a separate structure. When the force acting on the main cover housing 600 and the deflector 700 in the direction of separation is less than a predetermined force, the two remain in a mated state. However, when the force acting on the main cover housing 600 and the deflector 700 in the direction of separation is greater than the predetermined force, the two separate. With the above-described structure, the main cover housing 600 and the deflector 700 are configured as separate components. Therefore, if the fueling gun is inserted with incorrect force, the main cover housing 600 and the deflector 700 separate. When the fueling gun is subjected to vibration or external forces, the fueling gun stops discharging or refueling. Therefore, it can be understood that the separation of the main cover housing 600 and the deflector 700 serves as a warning and improves safety. Furthermore, the separate structure facilitates the replacement of the main cover housing 600 and the deflector 700 with corresponding sizes, improving adaptability and flexibility.

[0105] Specifically, refer to Figures 1 to 4 、 Figure 8 and Figure 9In this embodiment of the present invention, the main cover housing 600 and the deflector 700 are detachably connected via a connecting structure, allowing the device to be assembled and disassembled as needed, thereby increasing flexibility and making it easier to adapt to different work scenarios or needs. The deflector 700 or main cover housing 600 can be replaced with different types or sizes as needed.

[0106] Specifically, refer to Figures 1 to 4 、 Figure 8 and Figure 9 In an embodiment of the present invention, the connection structure includes a connecting protrusion 670 and a connecting groove 780. The connecting protrusion 670 is provided on the end of the main cover shell 600 opposite the deflector 700, and the connecting groove 780 is provided on the end of the deflector 700 opposite the main cover shell 600. The connecting protrusion 670 and the connecting groove 780 are engaged in a snap-fit ​​manner, and the projections of the opposing ends of the main cover shell 600 and the deflector 700 overlap. Of course, in some embodiments, the connecting protrusion 670 can also be provided on the deflector 700, and the connecting groove 780 can be provided on the main cover shell 600, but this is not limited here. With this arrangement, the connecting protrusion 670 and the connecting groove 780 are engaged in a snap-fit ​​manner, ensuring a stable and secure connection. This prevents the main cover unit from loosening or falling off during operation, ensuring normal operation. The overlapping projections of the opposing ends of the main cover shell 600 and the deflector 700 increase the tightness and stability of the connection, further improving reliability.

[0107] Specifically, in an embodiment of the present invention, the connecting protrusion 670 is configured to elastically swing relative to the central portion of the main cover chamber. With this structure, due to its elastic swinging properties, the connecting protrusion 670 can move relatively freely within the central portion of the main cover housing 600. During disassembly, the connecting protrusion 670 can be swung to a convenient position by applying appropriate force, thereby simplifying the disassembly process, reducing the difficulty of disassembly, and reducing waste of manpower and time. Furthermore, the swinging of the connecting protrusion 670 can reduce friction with the main cover housing 600 or other components, thereby protecting the integrity and durability of the connecting structure.

[0108] Specifically, refer to Figures 1 to 4 、 Figures 7 to 9In 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 deflector 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 deflector 700 opposite to the main cover shell 600. The second plug-in recess 791 and the second plug-in protrusion 792 are provided. The mounting recess 791 is formed by a concave portion of the outer wall of the deflector 700, the side of the second mounting protrusion 792 is connected to the side of the second mounting recess 791, and the outer surface of the second mounting protrusion 792 is higher than the bottom surface of the second mounting recess 791; the first mounting protrusion 682 is inserted into the second mounting recess 791, and the second mounting protrusion 792 is inserted into the first mounting recess 681, so that a part of the end structure of the main cover shell 600 opposite to the deflector 700 is externally mounted on the outer wall of the deflector 700, and the other part is embedded in the inner wall of the deflector 700.

[0109] The above structure increases the contact area between the components by inserting them into each other. After connection, a portion of the main cover housing 600 is exposed on the outer wall of the deflector 700, while the other portion is embedded in the inner wall of the deflector 700. This provides both external protection and coverage while ensuring a secure internal connection. This is crucial for ensuring sealing and waterproofing between the components.

[0110] Specifically, in an 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 inclined surface, which is inclined to the bottom surface of the second plug-in recess 791, and the limiting inclined surface is connected to one 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 plugged into the limiting groove, which helps to provide additional safety protection, avoid accidents or damage, and increase the stability and firmness of the connection.

[0111] Specifically, refer to Figures 1 to 4 、 Figures 7 to 9 In this embodiment of the present invention, the main cover housing 600 is provided with an insertion opening 691 extending along a first direction. The deflector 700 is provided with insertion protrusions and bosses extending along the first direction. The multiple insertion bosses engage with the multiple insertion openings 691 one by one, thereby further limiting relative rotation between the main cover housing 600 and the deflector 700 and improving installation stability. It should be noted that the insertion protrusions are the upper portion of the spoiler ribs, and the main cover housing 600 is provided with a clearance opening 692 that engages with the guide bosses, also improving installation stability.

[0112] It should be noted that, in this embodiment, the aforementioned guide structure 720 and limiting structure 730 both have a certain flow-disturbing effect. Specifically, in this embodiment of the present invention, there are multiple insertion openings 691 and multiple insertion ridges. The multiple insertion openings 691 are spaced apart on the sidewall of the main cover housing 600 corresponding to the first insertion recess 681, and the insertion openings 691 are connected to the first insertion recess 681. The multiple insertion ridges are spaced apart on the inner sidewall of the deflector 700 corresponding to the second insertion protrusion 792, and the multiple insertion bosses are plugged in and matched with the multiple insertion openings 691 one by one. The above arrangement ensures that the connection between the main cover housing 600 and the deflector 700 is stable and not easily deflected, making the assembly process more convenient.

[0113] It can be understood that in an embodiment of the present invention, the main cover unit is fixedly matched with the auxiliary gate unit, and the auxiliary gate unit is provided with an auxiliary gate chamber 110, which is docked with and connected to 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 auxiliary gate chamber 110 is used for inserting the refueling gun.

[0114] Specifically, refer to Figure 2 、 Figures 10 to 13 In an embodiment of the present invention, the auxiliary gate unit includes an auxiliary gate housing 100, a gate structure 200 and a fuel gun guide rail 300. The auxiliary gate housing 100 is provided with an auxiliary gate chamber 110. The 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 fuel 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 structure of the gate structure 200 is fixedly matched with the auxiliary gate housing 100; the fuel gun guide rail 300 is used to guide the movement of the fuel gun. The fuel 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 the first direction, one end of the gate structure 200 abuts against the 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.

[0115] Through the above structure, there is no need to unscrew the auxiliary gate unit when refueling. The refueling gun can be directly inserted and the gate structure 200 can be 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, achieving waterproof and dustproof, saving time and effort, and avoiding the situation of loosening; 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 abutted and matched in sequence, thereby improving the stability of the gate structure 200, thereby improving the stability and reliability of the entire auxiliary gate unit.

[0116] Reference Figure 2 、 Figures 10 to 13 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; wherein, gate bracket 210, gate member 220 and gate reset member 230 are configured as a split structure, and the portion of the gate reset member 230 that cooperates with the gate member 220 has a projection length on the gate member 220 that is greater than the distance from the outer wall of the gate member 220 to the centerline of the gate member 220. By adopting this structure, the gate member 220 opens the gate passage 215 in the second position or closes the gate passage 215 in the first position when needed, and the power of the gate reset member 230 is used to achieve automatic closing. The configuration allows the gate bracket 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 part of the 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.

[0117] Specifically, refer to Figures 11 to 13 In the embodiment of the present invention, the gate bracket 210 and the gate member 220 are detachably connected, and the gate member 220 is rotatable relative to the gate bracket 210. The structure is reasonable and compact, which improves space utilization.

[0118] Specifically, refer to Figures 11 to 13 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, and the first mounting groove 211 has a first end face opening and a first side face opening. A first protrusion 212 is provided on the side wall of the first mounting groove 211, and the first protrusion 212 is located at the first end face opening. The first protrusion 212 has an avoidance state and a limit 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 face opening and the first side face opening; when the first protrusion 212 is in the limit 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.

[0119] 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 fall off or move accidentally after installation, thereby enhancing the stability and safety of the cooperation between the gate member 220 and the gate bracket 210.

[0120] Specifically, refer to Figures 11 to 13 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 drive rod segment 232. The opposite sides of the drive 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-fitted to limit the rotation of the gate spring relative to the gate bracket 210, and the drive rod segment 232 abuts against the inner surface of the gate member 220. The above connection method ensures that the action of the gate spring can accurately drive the gate member 220 to achieve the opening and closing function.

[0121] Specifically, refer to Figures 11 to 13In an 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 area 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 and cooperate with 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 separating 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.

[0122] Specifically, refer to Figures 11 to 13 In this embodiment of the present invention, the end portion of the spiral rod segment 231 is inclined relative to the spiral region of the spiral rod segment 231, and the vertical distance between the two end surfaces of the end portion of the spiral rod segment 231 is greater than the maximum width of the first positioning channel 213. This further enables accurate positioning and secure fixation to the gate bracket 210, improving assembly accuracy and stability.

[0123] It is also understandable that, with reference to Figure 12 In this embodiment of the present invention, two positioning protrusions are provided on the inner surface of the gate member 220. The two positioning protrusions are spaced apart and engage with the inner surface of the gate member 220 to form a second positioning groove 222. The second positioning groove 222 is inserted into and engaged with the driving rod segment 232. The two positioning protrusions engage with opposite sides of the driving rod segment 232 one by one to restrict the movement of the driving rod segment 232 in the second direction relative to the gate member 220. With this structure, the provision of the second positioning groove 222 and the positioning protrusions can restrict the movement of the driving rod segment 232 in the second direction relative to the gate member 220, thereby improving the operational accuracy of the gate member 220 and ensuring that it can accurately perform the opening or closing action when required.

[0124] It is also understandable that, with reference to Figures 11 to 13In an embodiment of the present invention, the gate bracket 210 is provided with a gate channel 215 for the refueling gun to pass through. The side wall of the gate channel 215 is provided with an avoidance slope 216. The avoidance slope 216 is inclined and is connected to the end face of the gate bracket 210. The connection between the gate reset member 230 and the gate bracket 210 and the avoidance slope 216 are arranged facing each other, avoiding the collision of 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.

[0125] It is also understandable that, with reference to Figure 11 In this embodiment of the present invention, the outer surface of the gate member 220 is provided with a push-up boss 223. There is a gap between the outer wall of the push-up boss 223 and the outer wall of the gate member 220. The push-up boss 223 is provided with a push-up recess 2231 to facilitate smoother insertion and pushing. By increasing the thickness of the push-up boss 223 corresponding to the first concave curved surface, the durability of this area is enhanced, thereby extending the service life of the gate member 220. It should be noted that in this embodiment of the present invention, the gate spring is a torsion spring.

[0126] It is understandable that, referring to Figure 1 、 Figure 2 、 Figure 10 、 Figure 15 and Figure 16 In an embodiment of the present invention, the auxiliary gate housing 100 is provided with a drain port 120, and the fueling 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 fueling 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 an 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 since there are certain sealing requirements for the auxiliary gate unit and the entire capless 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 compatible with steam reflux type refueling guns.

[0127] 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 elastically deforms, 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 part 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 the operator.

[0128] Specifically, refer to Figure 10 、 Figure 15 and Figure 16 In an embodiment of the present invention, the blocking mechanism 400 includes an elastic plate 410, which has a fixed end and a free end. The fixed end of the elastic plate 410 is mounted on the fuel nozzle 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 spaced apart. 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 nozzle guide rail 300 of the auxiliary gate unit corresponding to the drainage channel 310. 0, so that the elastic sealing area 411 corresponds to covering 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 in various working environments.

[0129] Specifically, refer to Figure 10 、 Figure 15 and Figure 16In an 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 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; the free end of the elastic plate 410 is provided with a folding plate portion 412, and the rubber component 420 is provided with a contact protrusion 421, which abuts against 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.

[0130] Specifically, refer to Figure 2 In this embodiment of the present invention, the upper portions of the gate bracket 210 and the fueling nozzle guide 300 are stacked together, clamping the elastic plate 410 and the rubber member 420. This stacked arrangement increases the stability and rigidity of the entire structure, making it less likely to loosen or deform during operation. Furthermore, the clamping of the elastic plate 410 and the rubber member 420 simplifies the assembly process and facilitates maintenance or component replacement.

[0131] Specifically, refer to Figure 10 、 Figure 15 and Figure 16 In an 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 against 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.

[0132] It is also understandable that, with reference to Figure 10 、 Figure 15 and Figure 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 part 420 along its width direction, and the connecting channel 423 is formed between the second connecting arm 422 and one end of the rubber part 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 are projected on the bottom of the second mounting groove 322 to limit the second connecting arm 422 from being separated from the second mounting groove 322, providing 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, without the need for complex mechanical devices or additional locking components.

[0133] Specifically, refer to Figure 10 and Figure 11 In this embodiment of the present invention, the gate bracket 210 is provided with a guide protrusion 217 and two positioning recesses 218 along its length. The two positioning recesses 218 are located on opposite sides of the guide protrusion 217. A guide channel 424 is provided along the length of the rubber component 420. 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 recesses 218. When the rubber component 420 is inserted into the gate bracket 210 and the fueling nozzle guide 300, the guide protrusion 217 is inserted into the guide channel 424, and the positioning recesses 218 are matched with the side walls of the rubber component 420. This ensures that the rubber component 420 is accurately positioned relative to the gate bracket 210 and ensures a secure connection between the rubber component 420, the gate bracket 210, and the fueling nozzle guide 300.

[0134] It is understandable that, referring to Figures 2 to 11 as well as Figure 15 In this embodiment of the present invention, the gate bracket 210 is provided with a plug-in protrusion 2191, and the fueling nozzle guide 300 is provided with a plug-in groove 323. In the first direction from the first inlet to the first outlet, the plug-in protrusion 2191 and the plug-in groove 323 are plugged and matched, so that the upper parts of the two structures are stacked, improving assembly stability. Of course, in some embodiments, the gate bracket 210 may also be provided with a plug-in groove 323, and the fueling nozzle guide 300 may also be provided with a plug-in protrusion 2191.

[0135] It should be noted that, in this embodiment, the guide protrusion 217 and the two positioning concave surfaces 218 are all arranged on the outer side wall of the plug-in protrusion 2191 facing outward, which has a compact structure and a reasonable design.

[0136] It is understandable that, referring to Figures 2 to 11 as well as Figure 15 In an embodiment of the present invention, the inner wall of the auxiliary gate housing 100 is provided with a plurality of positioning grooves 130, and the plurality of positioning grooves 130 are arranged at circumferential intervals. The gate bracket 210 is provided with a plurality of elastic fixing members 2193, 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 extend 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 protrusion 21931 engage with the positioning groove 130 under elastic deformation and reset, so as to limit the relative movement of the gate bracket 210 and the auxiliary gate housing 100, 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.

[0137] It is also understandable that, with reference to Figures 14 to 17 In an embodiment of the present invention, a plurality of first positioning portions 2192 are provided on the gate bracket 210. The plurality of first positioning portions 2192 are spaced apart around the outer wall of the gate bracket 210, and the first positioning portions 2192 arrange the gate bracket 210 along a first direction. Specifically, the outer wall of the gate bracket 210 is provided with the first positioning portions 2192, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a first mating portion 140. The first mating portion 140 engages with the first positioning portions 2192 to limit the circumferential rotation of the gate bracket 210 relative to the auxiliary gate chamber 110. This can increase the contact area between the gate bracket 210 and the auxiliary gate housing 100, thereby improving the overall stability of the auxiliary gate unit and strengthening the connection.

[0138] Specifically, refer to Figures 14 to 17 In this embodiment, a second positioning portion 330 is provided on the outer wall of the fueling nozzle guide 300, and a second mating portion 150 is provided on the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100. The second mating portion 150 engages with the second positioning portion 330 to restrict circumferential rotation of the fueling nozzle guide 300 relative to the auxiliary gate chamber 110. During installation, the mating structure of the second positioning portion 330 and the second mating portion 150 provides both positioning and limiting functions, ensuring a secure installation of the fueling nozzle guide 300 while preventing problems caused by rotation during use. It is understood that the second positioning portion 330 may be a protrusion, the second mating portion 150 may be a groove, or they may be interchangeable.

[0139] Specifically, refer to Figures 14 to 16In an embodiment of the present invention, the fueling gun guide rail 300 is provided with a guide channel 340 extending through opposite ends, and the guide channel 340 is connected to the first outlet; wherein, along the first direction from 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 loss, and reduce the deflection that may occur during the insertion process, ensuring that the fueling gun remains stable and operates smoothly during operation, preventing swinging or loosening, thereby improving the safety and efficiency of the refueling operation.

[0140] Specifically, refer to Figures 14 to 17 In an embodiment of the present invention, at least one fixing structure 160 is provided on the auxiliary gate housing 100, and at least one elastic retaining structure 350 is provided on the outer wall of the fueling gun guide rail 300. The elastic retaining structure 350 extends radially. Under the action of external force, the elastic retaining structure 350 has a tendency to fit together with the outer wall of the fueling gun guide rail 300; wherein, the elastic retaining structure 350 corresponds to the fixing structure 160 to limit the rotation of the fueling gun guide rail 300 relative to the auxiliary gate housing 100, which can ensure that the fueling 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.

[0141] It is understandable that, referring to Figure 10 and Figure 14 In this embodiment of the present invention, the elastic retaining structure 350 is an elastic member, one end of which is connected to the outer wall of the fueling nozzle guide rail 300, while the other end is spaced apart from the outer wall. This structure simplifies the installation process, reduces difficulty, and improves precision, thereby making the installation of the entire fueling nozzle guide rail 300 and the auxiliary gate housing 100 smoother and more reliable. The elastic member's flexibility reduces the transmission of vibration between the fueling nozzle guide rail 300 and the housing, thereby reducing the impact of noise and vibration on the surrounding environment and users.

[0142] Specifically, refer to Figure 14In an 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 wall of the fueling 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 wall of the fueling gun rail 300, which can provide a solid connection point and ensure that the fueling gun rail 300 is firmly installed on the fixed structure 160 of the auxiliary gate housing 100. The design of the curved portion 352 gives the elastic member a certain degree of flexibility and elasticity, which can absorb external vibration and impact, reduce the impact of vibration on the fueling 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 fueling gun rail 300 to a certain extent, so that it can be more accurately installed on the auxiliary gate housing 100, reducing possible deviations during the installation process.

[0143] It should be noted that, referring to Figure 10 In an embodiment of the present invention, the above-mentioned fixing 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 makes it 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 elastically deforms to facilitate the disassembly and assembly of the fuel gun guide rail 300, and the operation is more convenient.

[0144] Specifically, in an embodiment of the present invention, the elastic member is an elastic plate integrally formed with the guide rail body, which provides 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 period of time, thereby extending its service life; the installation process may be simpler and quicker, without the need for additional connecting parts or steps.

[0145] Specifically, in this embodiment of the present invention, two elastic retaining structures 350 are provided, spaced apart on the outer sidewall of the guide rail body, to enhance positioning reliability and stability. It can be understood that there are also two fixed structures 160, with the number of fixed structures 160 matching the number of elastic retaining structures 350. In some embodiments, there may be one, three, or other elastic retaining structures 350, without limitation herein.

[0146] Specifically, refer to Figure 14 and Figure 15 In an embodiment of the present invention, a guide curved surface 341 is provided on the inner side wall of the guide channel 340. The guide curved surface 341 includes a first arc segment 3411, a second arc segment 3412 and a guide segment 3413 connected in sequence; wherein, the angles between the first arc segment 3411, the second arc segment 3412 and the center line of the guide channel 340 are both acute angles, and the guide segment 3413 is parallel to the center line of the guide channel 340.

[0147] 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, and allowing the fuel gun to 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.

[0148] It is understandable that, referring to Figure 1 、 Figure 2 、 Figure 10 and Figure 17 In this embodiment of the present invention, a water guide structure 170 is provided on the outer wall of the auxiliary gate housing 100. Located below the drain outlet 120, the water guide structure 170 is used to guide water to a predetermined location. This design helps guide water from below the drain outlet 120 to the predetermined location, preventing water from overflowing or flowing to inappropriate areas. This improves the controllability and diversion of the water flow, effectively directing water to the target location, accelerating the drainage process and improving drainage efficiency, thereby reducing drainage time. It also effectively prevents water accumulation and reduces the adverse effects of water flow on the structure and surrounding environment.

[0149] Specifically, in the embodiment of the present invention, the width of the water guide structure 170 is greater than the width of the drain outlet 120, which improves the drainage capacity and stability and ensures the normal operation and efficiency of the drainage system. Figure 17 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.

[0150] Specifically, refer to Figure 1 、 Figure 2 and Figure 10 In this embodiment of the present invention, the auxiliary door housing 100 is equipped with multiple snap-fit ​​structures 180, which are spaced apart and circumferentially arranged around the sidewalls of the auxiliary door housing 100. During assembly, the snap-fit ​​structures 180 secure the auxiliary door housing 100 to the vehicle body near the fuel tank, enhancing the stability and robustness of the overall structure. It will be appreciated that in this embodiment of the present invention, the multiple snap-fit ​​structures 180 are symmetrically arranged. This ensures a more even distribution of forces, reduces localized excessive stress, and helps extend the service life of the auxiliary door housing.

[0151] Specifically, refer to Figure 1 、 Figure 2 and Figure 10 In this embodiment of the present invention, the end wall of the auxiliary gate housing 100 is provided with a guide slope 190, which is arranged around the first inlet. This design effectively guides the fueling nozzle during insertion, improving insertion accuracy and ease of operation while reducing the risk of damage, thereby optimizing the efficiency and safety of fueling operations.

[0152] It is understandable that, referring to Figure 2 and Figure 10 In an embodiment of the present invention, the auxiliary gate unit includes a first sealing ring 510. The first sealing ring 510 is located between the outer wall of the fueling nozzle guide 300 and the inner wall of the auxiliary gate chamber 110. The first sealing ring 510 is sleeved on the outer wall of the fueling nozzle guide 300 and is used to seal the gap between the outer wall of the fueling nozzle guide 300 and the inner wall of the auxiliary gate chamber 110. The first sealing ring 510 is located between the first inlet and the drain outlet 120 to isolate the first inlet from the drain outlet 120. With the above structure, the first sealing ring 510 is placed between the outer wall of the fueling nozzle guide 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 outlet 120, it achieves isolation between the two locations, preventing liquid from flowing back to the first inlet during drainage.

[0153] It is understandable that, referring to Figure 2 and Figure 10 In this embodiment of the present invention, an annular protrusion is provided on the fueling nozzle guide rail 300. The annular protrusion is located at one end of the fueling nozzle guide rail 300 near the first outlet and is arranged around the end opening of the fueling nozzle guide rail 300. The annular protrusion is inserted into and circumferentially positioned with a portion of the structure of the main cover unit near the second inlet. The capless fueling device includes a second sealing ring 520. A portion of the second sealing ring 520 is engaged with the annular protrusion, while another portion of the second sealing ring 520 abuts against the main cover unit to seal the connection between the first outlet and the second inlet. With this structure, a portion of the second sealing ring 520 engages with the annular protrusion, while the other portion abuts against the main cover unit, thereby ensuring a reliable seal at the connection between the first outlet and the second inlet, providing an excellent sealing structure and preventing fuel vapor from leaking out of the fuel tank.

[0154] 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 seal 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, protecting components from damage.

[0155] It can be understood that in the embodiment of the present invention, the overall assembly process of the above-mentioned capless 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 car, 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 car.

[0156] 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.

[0157] It can be understood that in the embodiment of the present invention, the use process of the above-mentioned capless 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 device 700, and abuts and cooperates with the limiting structure 730, and then refueling is carried out.

[0158] 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 various embodiments of the present invention.

Claims

1. A main cover unit, characterized in that: The invention comprises a main cover housing (600) and a valve structure, wherein the main cover housing (600) is provided with a main cover channel (610), the 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), and the main cover spring (540) is used to drive the valve structure to rotate to a preset position to close the main cover channel (610); the valve structure comprises: a lower cover (810), the lower cover (810) being rotatably connected to the main shaft (530); An upper cover (820), the upper cover (820) is detachably connected to the lower cover (810), and the upper cover (820) and the lower cover (810) cooperate to form a pressure relief channel; a valve body assembly (830) detachably disposed between the lower cover (810) and the upper cover (820), the valve body assembly (830) being used to cut off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel, the valve body assembly (830) having a closed state and a pressure relief state; When the valve body assembly (830) is in the closed state, the external pressure applied to the valve body assembly (830) is less than a preset threshold value, and the valve body assembly (830) abuts against the lower cover (810) to cut off the communication between the pressure inlet end and the pressure relief end of the pressure relief channel; When the external pressure applied to the valve body assembly (830) is greater than a preset threshold value, the valve body assembly (830) is separated from the lower cover (810), the valve body assembly (830) is in a pressure relief state, and the valve body assembly (830) releases the isolation of the pressure inlet end and the pressure relief end relative to each other in the pressure relief channel; The main cover unit further comprises a flow deflector (700), the flow deflector (700) being connected to the main cover housing (600), the flow deflector (700) being provided with a flow deflection channel (710), the flow deflection channel (710) being in communication with the main cover channel (610) to form a main cover chamber; 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; The position of the valve structure (800) closing the main cover chamber is higher than the position of the gas circulation structure on the main cover housing (600); The inner side wall of the main cover shell (600) is provided with a first annular step (661), a second annular step (662) and a third annular step (663). In a first direction, the first annular step (661), the second annular step (662) and the third annular step (663) are arranged in a descending step structure from the outside to the inside; 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 deviated from the center line of the main cover chamber.

2. The main cover unit according to claim 1, wherein: The lower cover (810) is provided with a lower chamber (811), and the upper cover (820) is provided with an upper chamber (821). The lower cover (810) and the upper cover (820) are detachably 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 a distance is provided 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), the pressure inlet hole (812) passes through the bottom wall of the lower chamber (811), and the pressure relief gap, the valve body chamber and the pressure inlet hole (812) are sequentially connected to form the pressure relief channel; When the valve body assembly (830) is in the closed state, the external pressure applied to the valve body assembly (830) is less than a preset threshold value, and 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 a 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.

3. The main cover unit according to claim 2, wherein: The valve body assembly (830) includes: A valve body (831), the valve body (831) being movably disposed in the valve body chamber, the valve body (831) being provided with a valve body sealing layer (832), the cross-sectional area of ​​the valve body sealing layer (832) being larger than the cross-sectional area of ​​the pressure inlet hole (812), so as to be used for sealing the pressure inlet hole (812); A valve body reset member (833), one end of which is mounted on the valve body main body (831), and the other end of which is mounted on the valve body main body (831), wherein 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.

4. The main cover unit according to claim 3, characterized in that 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).

5. The main cover unit according to claim 4, characterized in that The valve body sealing layer (832) comprises a sealing body (8321) and a mounting column (8322) connected to the sealing body (8321), wherein the mounting column (8322) has a snap-fit ​​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 passed through the mounting hole, wherein the clamping section corresponds to the mounting hole, and the limiting section is located inside the mounting cavity (8311). 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).

6. The main cover unit according to claim 1, wherein: The upper cover (820) is provided with a first annular plug-in boss (822), the first plug-in boss (822) is arranged around the upper chamber (821), a first plug-in gap is provided between the outer wall of the first plug-in boss (822) and the outer peripheral 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), the second plug-in boss (813) is arranged around the lower chamber, and a second plug-in gap is provided between the outer side wall of the second plug-in boss (813) and the lower chamber (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); In which, the first plug-in boss (822) is inserted into the second plug-in gap, and there is a distance 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 into the second plug-in gap, and the assembly hole (8141) is snap-fitted with the assembly protrusion (823) to limit the back-to-back movement of the lower cover (810) and the upper cover (820) in the first direction.

7. The main cover unit according to claim 1, wherein: An arc-shaped pushing concave surface (824) is provided on one end surface of the upper cover (820) facing away from the lower cover (810). The pushing concave surface (824) is used to adapt to the refueling gun and can position the refueling gun.

8. The main cover unit according to claim 1, wherein: 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 plug-fitted with the main cover shell (600); the limiting head is located in the first opening (630); and an end of the mounting shaft portion away from the limiting head is located in the second opening (640); The main cover shell (600) is provided with a stop structure (650), and the stop structure (650) is used to limit the movement of the main shaft (530) relative to the main cover shell (600).

9. A capless refueling device, characterized in that: include: The main cover unit according to any one of claims 1 to 8; 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).

Images