Auxiliary gate unit for capless refueling and capless refueling device

Abstract

The present invention relates to the technical field of automobile refueling devices, and provides a capless refueling auxiliary gate unit and a capless refueling device, wherein the auxiliary gate unit comprises an auxiliary gate housing, a gate structure and a refueling gun guide rail, wherein the gate structure is fixedly arranged inside the auxiliary gate chamber; the refueling gun guide rail is fixedly arranged inside the auxiliary gate chamber; in a first direction, one end of the gate structure abuts against an inner wall at one end of the auxiliary gate chamber, and the other end of the gate structure abuts against one end of the refueling gun guide rail. The gate structure is a single-door structure to prevent water and dust from entering, and can ensure that the door is tightly closed in a non-refueling state, thereby achieving waterproof and dustproof, saving time and effort, and avoiding the situation of leaking; at the same time, when the refueling gun is inserted, the auxiliary gate chamber, the gate structure and the refueling gun guide rail abut and cooperate in sequence, thereby improving the stability of the gate structure, thereby improving the stability and reliability of the entire auxiliary gate unit.

Description

Technical Field

[0001] The invention relates to the technical field of automobile refueling devices, and in particular to a capless refueling auxiliary gate 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 inlet. 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 fuel filler cap in the related art has the following problems: the operator needs to twist and unscrew the cap of the fueling device, which is time-consuming and laborious, and some operators (for example, some refueling personnel abroad are usually car owners themselves) forget to close it after refueling. In addition, some refueling devices have low dust and water resistance and poor structural stability. Summary of the invention

[0004] The present invention provides a capless refueling auxiliary gate unit, which is used to solve the problems in the related art that the operation of the refueling device is time-consuming and labor-intensive, there is a possibility of screwing leakage, the dust and water resistance of some refueling devices is low, and the structural stability is poor.

[0005] The present invention provides a capless refueling auxiliary gate unit, comprising:

[0006] A secondary gate housing, wherein the secondary gate housing is provided with a secondary gate chamber, wherein opposite ends of the secondary gate chamber are respectively a first inlet and a first outlet, and the secondary gate chamber is used for inserting a refueling gun;

[0007] A gate structure, used to open or close the first inlet, the gate structure is fixedly arranged inside the auxiliary gate chamber, and a part of the gate structure is fixedly matched with the auxiliary gate housing;

[0008] A fueling gun guide rail, used to guide the movement of the fueling gun, the fueling gun guide rail is fixedly arranged inside the auxiliary gate chamber, the fueling gun guide rail is located on one side of the gate structure, and a part of the structure of the fueling gun guide rail is fixedly matched with the auxiliary gate housing;

[0009] In a first direction, one end of the gate structure abuts against an inner wall of one end of the auxiliary gate chamber, and the other end of the gate structure abuts against an end of the fuel gun guide rail; wherein, when the gate structure is subjected to the pushing force of the fuel gun, the first inlet is opened, and the opening direction of the gate structure is toward the location of the first outlet; after the gate structure loses contact with the fuel gun, the first inlet is closed, and the closing direction of the gate structure is toward the location of the first inlet.

[0010] According to a capless refueling auxiliary gate unit provided by the present invention, the gate structure includes: a gate bracket, the gate bracket is fixedly connected to the auxiliary gate housing; a gate member, the gate member is movably connected to the gate bracket, and the gate member can open or close the first inlet when it moves relative to the gate bracket; a gate spring, a part of the gate spring structure is installed on the gate member, and the other part of the gate spring structure is installed on the gate bracket; wherein the cross-sectional area of ​​the first inlet is smaller than the cross-sectional area of ​​the gate member, when the gate spring drives the gate member to move to abut and fit with the end wall of the auxiliary gate chamber close to the first inlet, the first inlet can be closed.

[0011] According to a capless refueling auxiliary gate unit provided by the present invention, the auxiliary gate housing is provided with a drainage port, and the refueling gun guide rail is provided with a drainage channel connected to the drainage port;

[0012] The auxiliary gate unit also includes a blocking mechanism, which is arranged on the refueling gun guide rail and has a blocking state and an open state; wherein the blocking mechanism in the open state can open the drainage channel; the blocking mechanism can switch from the open state to the blocking state under the action of external force to block the drainage channel.

[0013] According to a sub-gate unit for capless refueling provided by the present invention, the sealing mechanism has an elastic sealing area, the elastic sealing area is used to seal the drainage channel, and the elastic sealing area has a first angle and a second angle; when the elastic sealing area is at the first angle, the elastic sealing area and the drainage channel are spaced apart, and part of the structure of the elastic sealing area is located on the path where the refueling gun is inserted; when the elastic sealing area is subjected to external pressing force, the elastic sealing area is elastically deformed, the elastic sealing area is rotated to the second angle, and the elastic sealing area contacts the drainage channel to close the drainage channel; when the external pressing force applied to the elastic sealing area is cancelled, the elastic member returns to the first angle, and the elastic sealing area is separated from the drainage channel.

[0014] According to a capless refueling auxiliary gate unit provided by the present invention, the auxiliary gate unit includes a first sealing ring, the first sealing ring is located between the outer wall of the refueling gun guide rail and the inner wall of the auxiliary gate chamber, and the first sealing ring is sleeved on the outer wall of the refueling gun guide rail, the first sealing ring is used to seal the gap between the outer wall of the refueling gun guide rail and the inner wall of the auxiliary gate chamber; wherein, the first sealing ring is located between the first inlet and the drain outlet to cut off the connection between the first inlet and the drain outlet.

[0015] According to a capless refueling auxiliary gate unit provided by the present invention, one of the gate bracket and the refueling gun guide rail is provided with an insertion protrusion, and the other of the gate bracket and the refueling gun guide rail is provided with an insertion groove, wherein along the first direction from the first inlet to the first outlet, the insertion protrusion and the insertion groove are plug-fitted together.

[0016] According to a capless refueling auxiliary gate unit provided by the present invention, the outer wall of the gate bracket is provided with a first positioning portion, the inner wall of the auxiliary gate chamber of the auxiliary gate shell is provided with a first matching portion, the first matching portion is snap-fitted with the first positioning portion to limit the circumferential rotation of the gate bracket relative to the auxiliary gate chamber; the outer wall of the refueling gun guide rail is provided with a second positioning portion, the inner wall of the auxiliary gate chamber of the auxiliary gate shell is provided with a second matching portion, the second matching portion is snap-fitted with the second positioning portion to limit the circumferential rotation of the refueling gun guide rail relative to the auxiliary gate chamber.

[0017] According to a capless refueling auxiliary gate unit provided by the present invention, the refueling gun guide rail is provided with a guide channel penetrating at two opposite ends, and the guide channel is connected to the first outlet;

[0018] Wherein, along a first direction from the first inlet to the first outlet, an opening of the guide channel at one end close to the first inlet is larger than an opening of the guide channel at the other end close to the first outlet.

[0019] The present invention also provides a capless refueling device, comprising: the above-mentioned capless refueling auxiliary gate unit; a main cover unit, the main cover unit is fixedly matched with the auxiliary gate unit, the main cover unit has 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 refueling gun to be inserted for refueling, and to limit the insertion stroke of the refueling gun; wherein, the first outlet is docked with and connected to the second inlet.

[0020] According to a capless refueling device provided by the present invention, the capless refueling device includes a second sealing ring, an annular protrusion is provided on the refueling gun guide rail, the annular protrusion is located at one end of the refueling gun guide rail close to the first outlet, and the annular protrusion is arranged around the end opening of the refueling gun guide rail; the annular protrusion is inserted into and circumferentially positioned with a partial structure on the main cover unit close to the second inlet, wherein a partial structure of the second sealing ring is sleeved and matched with the annular protrusion, and another partial structure of the second sealing ring is abutted against the main cover unit to seal the docking connection between the first outlet and the second inlet.

[0021] The auxiliary gate unit for refueling without a cap provided by the present invention does not need to be unscrewed when refueling, and the refueling gun can be directly inserted, and the gate structure is pushed by the refueling gun to open the first inlet, so that the refueling gun is inserted into the auxiliary gate chamber, the gate structure and the refueling gun guide rail to realize the refueling operation. Through the above structure, the operation of opening and closing the refueling port cover is omitted when refueling, and the gate structure can only open the first inlet under the push force of the refueling gun, and the door opening direction is toward the position of the first outlet; after the gate structure is out of contact with the refueling gun, the first inlet can be closed, and the door closing direction is toward the position of the first inlet, so that the above gate structure 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, realizing waterproof and dustproof, saving time and effort, and avoiding the situation of missing screwing; at the same time, when the refueling gun is inserted, the auxiliary gate chamber, the gate structure and the refueling gun guide rail are sequentially abutted and matched, which improves the stability of the gate structure, thereby improving the stability and reliability of the entire auxiliary gate unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is an overall schematic diagram of the capless refueling device provided by the present invention;

[0024] Figure 2 is a cross-sectional schematic diagram of a capless refueling device provided by the present invention;

[0025] Figure 3 is an exploded schematic diagram of the auxiliary gate unit provided by the present invention;

[0026] Figure 4 It is a structural schematic diagram of the gate structure provided by the present invention;

[0027] Figure 5 It is a first perspective exploded schematic diagram of the gate structure provided by the present invention;

[0028] Figure 6 is a second perspective exploded schematic diagram of the gate structure provided by the present invention;

[0029] Figure 7 It is a structural schematic diagram of the fueling gun guide rail provided by the present invention;

[0030] Figure 8 is a cross-sectional schematic diagram of a fueling gun guide rail provided by the present invention;

[0031] Fig. 9 yes Figure 8 A schematic diagram of the structure enlargement in the middle;

[0032] Fig.10 It is a structural schematic diagram of the auxiliary gate housing provided by the present invention;

[0033] Fig.11 is a structural schematic diagram of a main cover unit provided by the present invention;

[0034] Fig.12 is an exploded schematic diagram of the main cover unit provided by the present invention;

[0035] Fig.13 is an exploded schematic diagram of the valve structure provided by the present invention;

[0036] Fig.14 is a cross-sectional schematic diagram of a valve structure provided by the present invention;

[0037] Fig.15 It is a structural schematic diagram of the main cover shell provided by the present invention;

[0038] Fig.16 It is a structural schematic diagram of the deflector provided by the present invention;

[0039] Fig.17 It is a cross-sectional schematic diagram of the deflector provided by the present invention.

[0040] Reference numerals:

[0041] 100, auxiliary gate housing; 110, auxiliary gate chamber; 120, drain outlet; 130, positioning groove; 140, first matching part; 150, second matching part; 160, fixing structure; 170, water guide structure; 171, guiding inclined surface; 180, buckle structure; 181, clamping groove; 182, buckle protrusion; 190, guiding inclined surface; 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 inclined surface; 217, guiding protrusion; 218, positioning concave surface; 2191, plug-in protrusion; 2192, first positioning part; 2193, elastic fixing member; 21931, elastic fixing protrusion; 220, gate member; 221, first connecting arm; 22 2. Second positioning groove; 223. Pushing boss; 2231. Pushing recess; 230. Gate spring; 231. Screw rod section; 232. Driving rod section; 300. Fueling gun guide rail; 310. Drainage channel; 321. Fixing channel; 322. Second mounting groove; 3221. Second protrusion; 323. Inserting 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 positioning structure; 351. Connecting portion; 352. Bending portion; 400. Blocking mechanism; 410. Elastic plate; 411. Elastic blocking area; 412. Folding plate; 420. Rubber member; 421. Abutting protrusion; 422. Second connecting arm; 423. Connecting channel; 424. Guide channel;

[0042] 510, first sealing ring; 520, second sealing ring; 530, main shaft; 540, main cover spring; 550, main cover sealing layer; 551, assembly section; 552, sealing section; 560, main cover sealing ring; 600, main cover housing; 610, main cover channel; 620, limiting boss; 630, first through-port; 640, second through-port; 650, stop structure; 661, first annular step; 662, second annular step; 663, third annular step; 670, connecting protrusion; 681, first plug-in recess; 682, first plug-in protrusion; 691, plug-in port; 692, avoidance port;

[0043] 700, guide; 710, guide channel; 711, first straight section; 712, inclined guide section; 713, second straight section; 720, guide structure; 721, guide arc surface; 730, limit structure; 731, limit step; 740, spoiler structure; 750, elastic positioning structure; 751, connecting section; 752, positioning section; 760, notch; 771, first wall thickness; 772, second wall thickness; 773, third wall thickness; 780, connecting groove; 791, second plug-in recess; 7911, limit boss; 792, second plug-in protrusion;

[0044] 800, valve structure; 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 surface; 820, upper cover; 821, upper chamber; 8211, installation protrusion; 822, first plug-in boss; 823, assembly protrusion; 824, pushing concave surface; 825, limiting end surface; 830, valve body assembly; 831, valve body; 8311, installation cavity; 832, valve body sealing layer; 8321, sealing body; 8322, installation column; 833, valve body reset member; 910, first gas circulation port; 920, second gas circulation port. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Combine the following Figure 1-Figure 17 The invention describes a capless refueling auxiliary gate unit and a capless refueling device. The capless refueling device comprises a capless refueling auxiliary gate unit and a main cap unit.

[0047] Reference Figures 2 to 10As shown, according to the present invention, a capless refueling auxiliary gate unit is provided, comprising: an auxiliary gate housing 100, 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, and the auxiliary gate chamber 110 is used for inserting a refueling gun; a gate structure 200, used to open or close the first inlet, the gate structure 200 is fixedly arranged inside the auxiliary gate chamber 110, and a part of the gate structure 200 is fixedly matched with the auxiliary gate housing 100; a refueling gun guide rail 300, used to guide the refueling gun to move, the refueling gun guide rail 300 is fixedly arranged inside the auxiliary gate chamber 110, and the refueling gun guide rail 300 is used to guide the refueling gun to move. The rail 300 is located on one side of the gate structure 200, and part of the structure of the fueling gun guide rail 300 is fixedly matched with the auxiliary gate housing 100; in a first direction, one end of the gate structure 200 abuts against an inner wall of one end of the auxiliary gate chamber 110, and the other end of the gate structure 200 abuts against one end of the fueling gun guide rail 300; wherein, when the gate structure 200 is subjected to the pushing force of the fueling gun, the first inlet is opened, and the opening direction of the gate structure 200 is toward the location of the first outlet; after the gate structure 200 is out of contact with the fueling gun, the first inlet is closed, and the closing direction of the gate structure 200 is toward the location of the first inlet.

[0048] The capless refueling auxiliary gate unit provided by the present invention does not 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, thereby achieving waterproof and dustproof, saving time and effort, and avoiding the situation of leaking; at the same time, when the fuel gun is inserted, the auxiliary gate chamber 110, the gate structure 200 and the fuel gun guide rail 300 are sequentially abutted and matched, thereby improving the stability of the gate structure 200, thereby improving the stability and reliability of the entire auxiliary gate unit.

[0049] It is understandable that, referring to Figures 4 to 6In the embodiment of the present invention, the gate structure 200 includes: a gate bracket 210, which is fixedly connected to the auxiliary gate housing 100; a gate member 220, which is movably connected to the gate bracket 210, and the gate member 220 can open or close the first entrance when it moves relative to the gate bracket 210; a gate spring 230, a part of the gate spring 230 is installed on the gate member 220, and another part of the gate spring 230 is installed on the gate bracket 210; wherein the cross-sectional area of ​​the first entrance is smaller than the cross-sectional area of ​​the gate member 220, when the gate spring 230 drives the gate member 220 to move to abut against and fit with the end wall of the auxiliary gate chamber 110 close to the first entrance, the first entrance is closed.

[0050] With the above structure, the gate member 220 opens or closes the first inlet when needed, and is automatically closed by the force of the gate spring 230. When the gate member 220 is pushed toward the end wall of the auxiliary gate chamber 110, since the cross-sectional area of ​​the first inlet is smaller than that of the gate member 220, the gate member 220 will be pressed, thereby effectively closing the first inlet. This design ensures that the first inlet can be automatically opened or closed when the fuel gun is inserted or removed, thereby achieving convenient operation while effectively preventing the intrusion of water and dust.

[0051] Specifically, refer to Figures 4 to 6 In the embodiment of the present invention, the gate bracket 210, the gate member 220 and the gate spring 230 are configured to be detachably matched with each other, and the projection length of the partial structure of the gate spring 230 that matches 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. With the above structure, the configuration allows the gate bracket 210, the gate member 220 and the gate spring 230 to be easily disassembled in pairs, thereby improving the maintainability and replaceability of the gate components; moreover, the projection length of the partial structure of the gate spring 230 that matches 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 assembly can always maintain good sealing performance and operating efficiency during operation.

[0052] Specifically, refer to Figures 4 to 6In the embodiment of the present invention, the gate bracket 210 is detachably connected to the gate member 220, and the gate member 220 is rotatable relative to the gate bracket 210. Through the above arrangement, it is easier to maintain and replace the gate member 220. The gate member 220 is rotatable relative to the gate bracket 210, which means that the position or angle of the gate member 220 can be adjusted to adapt to different working requirements or environmental conditions. It can be understood that when the gate member 220 rotates into the gate bracket 210 to open the first inlet, the gate member 220 leans against the inner wall of the gate bracket 210 to avoid the insertion of the refueling gun. The structure is reasonable and compact, and the space utilization rate is improved.

[0053] Specifically, refer to Figures 4 to 6 In the embodiment of the present invention, a first connecting arm 221 is provided on the gate member 220; a first mounting groove 211 is provided at the end of the gate bracket 210, the first mounting groove 211 is provided with a first end surface opening and a first side surface opening, a first protrusion 212 is provided on the side wall of the first mounting groove 211, the first protrusion 212 is located at the first end surface opening, and the first protrusion 212 has an avoidance state and a limiting state; wherein, when the first protrusion 212 is in the avoidance state, the first connecting arm 221 is rotatably inserted into the first mounting groove 211 along the first end surface opening and the first side surface opening; when the first protrusion 212 is in the limiting state, the projections of the first protrusion 212 and the first connecting arm 221 on the bottom of the first mounting groove 211 overlap, so as to limit the first connecting arm 221 from being separated from the first mounting groove 211.

[0054] Through the above arrangement, the first connecting arm 221 can be rotatably inserted into the first mounting groove 211 along the first end face opening and the first side face opening, so that the gate member 220 can be more convenient to install and disassemble, while ensuring the stability of the connection; in the avoidance state, the first connecting arm 221 is allowed to be inserted into the mounting groove, and in the limiting state, the first protrusion 212 and the first connecting arm 221 are projected on the bottom of the mounting groove and overlap, thereby limiting the first connecting arm 221 from being separated from the mounting groove. The above design can ensure that the gate member 220 will not accidentally fall off or move after installation, thereby enhancing the stability and safety of the cooperation between the gate member 220 and the gate bracket 210.

[0055] Specifically, refer to Figures 4 to 6In the embodiment of the present invention, the gate spring 230 includes two spiral rod segments 231 and a driving rod segment 232, and the two opposite sides of the driving rod segment 232 are respectively connected to the two spiral rod segments 231; wherein, the gate bracket 210 is provided with two first positioning channels 213 along the first direction, and the two spiral rod segments 231 correspond to the two first positioning channels 213 one by one and are plug-fitted to limit the gate spring 230 from rotating relative to the gate bracket 210, and the driving rod segment 232 abuts against the inner surface of the gate member 220. Through the above structure, the rotation of the gate spring 230 relative to the gate bracket 210 is limited, and the stability and controllability of the gate spring 230 in the process of driving the gate member 220 are ensured; the driving rod segment 232 provides a supporting force to support the movement of the gate member 220, and the above connection method ensures that the action of the gate spring 230 can accurately drive the gate member 220 to achieve the opening and closing function.

[0056] Specifically, refer to Figures 4 to 6 In the embodiment of the present invention, the gate bracket 210 is provided with two first positioning grooves 214, and the bottom of each first positioning groove 214 is provided with a first positioning channel 213, the spiral region of the spiral rod segment 231 is located in the first positioning groove 214, and one end of the spiral rod segment 231 is inserted into the first positioning channel 213; wherein, the bottom of the first positioning groove 214 is used to support the spiral rod segment 231 to limit the movement of the spiral rod segment 231 along the first direction; the opposite side walls of the first positioning groove 214 abut against the opposite sides of the spiral rod segment 231 to limit the movement of the spiral rod segment 231 relative to the gate bracket 210 along the second direction; the first positioning channel 213 is used to limit the spiral rod segment 231 from detaching from the gate bracket 210 along the second direction. With the above structure, the movement of the spiral rod segment 231 in two directions can be limited, ensuring that it is firmly fixed on the gate bracket 210 at the specified position, and the connection is more firm and reliable, thereby enhancing the stability and reliability of the entire mechanism.

[0057] Specifically, refer to Figures 4 to 6 In the embodiment of the present invention, one end of the spiral rod segment 231 is inclined with respect to the spiral region of the spiral rod segment 231, which can further correctly position and firmly fix the gate bracket 210, thereby improving the assembly accuracy and stability.

[0058] It is also understandable that, with reference to Figure 5In the embodiment of the present invention, a second positioning groove 222 is provided on the inner surface of the gate member 220, and the second positioning groove 222 is inserted into and matched with the driving rod segment 232, and the opposite sides of the second positioning groove 222 are matched one by one with the opposite sides of the driving rod segment 232 to limit the movement of the driving rod segment 232 in the second direction relative to the gate member 220, thereby ensuring the stability and reliability of its position, enhancing the stability of the connection between them, avoiding loosening or falling off during use, and improving the operating accuracy of the gate member 220, ensuring that it can accurately perform the opening or closing action when needed.

[0059] It is also understandable that, with reference to Figures 4 to 6 In the embodiment of the present invention, the gate bracket 210 is provided with a gate channel 215 for the refueling gun to pass through, and the side wall of the gate channel 215 is provided with an avoidance slope 216, which is arranged in contact with the end face of the gate bracket 210, and the connection between the gate spring 230 and the gate bracket 210 and the avoidance slope 216 are arranged facing each other, which can effectively guide the refueling gun to pass through the gate channel 215, so that it can smoothly enter or exit the channel, reduce the resistance and friction during the refueling process, improve the convenience of operation, reduce the direct contact between the refueling gun and the gate bracket 210, reduce friction, and extend the service life of the gate bracket 210; during the insertion of the refueling gun, it provides support and stability for the collision at the connection between the gate spring 230 and the gate bracket 210.

[0060] It is also understandable that, with reference to Figure 4 In the embodiment of the present invention, a push boss 223 is provided on the outer surface of the gate member 220, and there is a distance between the outer wall of the push boss 223 and the outer wall of the gate member 220, and a push recess 2231 is provided on the push boss 223, and the push recess 2231 includes a first concave arc surface and a first concave curved surface connected to the first arc surface, and the first concave arc surface and the first concave curved surface are respectively away from the connection between the gate spring 230 and the gate bracket 210; wherein, the first concave arc surface part structure is located in the middle area of ​​the gate member 220, and the first concave curved surface is arranged away from the middle area of ​​the gate member 220; the thickness of the push boss 223 corresponding to the first concave curved surface is greater than the thickness of the push boss 223 corresponding to the first concave arc surface.

[0061] Through the above configuration, by providing the push boss 223 and the push recess 2231, the refueling gun can be inserted or pushed more easily. For example, when inserting and pushing, the concave surface provides additional space, so that the insertion and pushing are smoother; by increasing the thickness at the first concave surface on the push boss 223, the durability of the area is enhanced, thereby extending the service life of the gate member 220. It should be noted that in the embodiment of the present invention, the gate spring 230 is a torsion spring.

[0062] It is understandable that, referring to Figures 1 to 3 and 8 and Fig. 9 In the embodiment of the present invention, the auxiliary gate housing 100 is provided with a drain port 120, and the fuel gun guide rail 300 is provided with a drain channel 310 connected to the drain port 120; the auxiliary gate unit also includes a blocking mechanism 400, which is provided on the fuel gun guide rail 300, and the blocking mechanism 400 has a blocking state and an open state; wherein the blocking mechanism 400 in the open state can open the drain channel 310; the blocking mechanism 400 can switch from the open state to the blocking state under the action of external force to block the drain channel 310. Through the specially designed drain port 120 and drain channel 310, a small amount of water flowing in from the gap between the auxiliary gate housing 100 and the gate structure 200 can be discharged from the drain port 120, avoiding the decrease in the sealing performance of the auxiliary gate unit and the partial damage of the main cover unit caused by the insertion of the refueling gun after freezing; and because there are certain sealing requirements for the auxiliary gate unit and the entire 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 able to cope with steam reflux type refueling guns.

[0063] 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 an external refueling gun, the elastic sealing area 411 is elastically deformed, and the elastic sealing area 411 is rotated to the second angle, and the elastic sealing area 411 contacts the drainage channel 310 to close the drainage channel 310; when the pressing force applied by the external refueling gun to the elastic sealing area 411 is cancelled, the elastic member returns to the first angle, and the elastic sealing area 411 is separated from the drainage channel 310.

[0064] With the above structure, the elastic blocking area 411 is at a first angle, the drain port 120 and the drain channel 310 are not blocked and are open, and the elastic blocking area 411 is rotated to a second angle, the drain port 120 and the drain channel 310 are blocked and closed. The design of the elastic blocking area 411 can effectively block the drain channel 310, and is in full contact with the drain channel 310 at the second angle, ensuring the sealing and preventing oil leakage or other liquid leakage; when pressure is applied by an external refueling gun, the elastic blocking area 411 will automatically elastically deform and rotate to the second angle to close the drain channel 310. The elastic blocking area 411 automatically blocks or unseals according to the pressure applied by the external refueling gun. The flexible response and automated operation simplify the refueling process, ensure the safety of operation, improve efficiency, and reduce the workload of operators.

[0065] Specifically, refer to Figure 3 , Figure 8 and Fig. 9 In an embodiment of the present invention, the blocking mechanism 400 includes an elastic plate 410, and the elastic plate 410 has a fixed end and a free end. The fixed end of the elastic plate 410 is installed on the fuel gun guide rail 300 of the auxiliary gate unit and the gate bracket 210, and the free end of the elastic plate 410 faces the drainage channel 310 and the two are arranged at an interval, and an 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 side wall area of ​​the fuel gun guide rail 300 of the auxiliary gate unit corresponding to the drainage channel 310, so that the elastic blocking area 411 corresponds to covering the drainage channel 310.

[0066] The above structure adopts an elastic plate 410 as a blocking element, which has good elasticity, a simple and intuitive operation process, and does not require complex control devices or external intervention, thereby reducing maintenance and operating costs. The structure is relatively simple, easy to manufacture and install, and effectively covers the drainage channel 310. The installation position is stable and can reliably support the elastic blocking area 411. 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 blocking mechanism 400 can maintain good sealing and stability under various working environments.

[0067] Specifically, refer to Figure 3 , Figure 8 and Fig. 9In the embodiment of the present invention, the blocking mechanism 400 also includes a rubber component 420, which is located on one side of the elastic plate 410, one end of the rubber component 420 is installed 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, and the contact protrusion 421 is in contact with the plate surface of the folding plate portion 412; wherein, the cross-sectional area of ​​the contact protrusion 421 is smaller than the cross-sectional area of ​​the folding plate portion 412.

[0068] Through the above arrangement, the combination of the rubber component 420 and the elastic plate 410 can better seal the drainage channel 310, form a more perfect sealing structure, improve the sealing effect and reduce friction, so as to provide smoother and more stable performance during the mechanical operation. In this design, the rubber component 420 is placed on one side of the elastic plate 410 and connected to the oil gun guide rail 300 of the auxiliary gate unit. The purpose is to use the elastic characteristics of the rubber component 420 to absorb the impact force generated during the movement, reduce the movement noise, and protect the elastic plate 410 from excessive wear; the abutting protrusion 421 on the rubber component 420 is in surface contact with the folding plate portion 412 on the elastic plate 410, so that the contact area of ​​the abutting point is smaller, thereby reducing the friction force, which is particularly beneficial for mechanical parts that need to be opened and closed frequently or quickly. The design that the cross-sectional area of ​​the abutting protrusion 421 is smaller than the folding plate portion 412 can ensure that the abutting force is concentrated in a smaller area, which helps to improve the accuracy and efficiency of the abutment, and also reduces the wear caused by friction.

[0069] Specifically, refer to Figure 2 In the embodiment of the present invention, the upper structures of the gate bracket 210 and the fueling gun guide rail 300 are stacked and clamp the elastic plate 410 and the rubber part 420. Through the upper setting, the stacking setting can increase the stability and rigidity of the entire structure, making it less likely to loosen or deform during operation, and by clamping the elastic plate 410 and the rubber part 420, the entire assembly process can be simplified, and it is also more convenient when maintenance or replacement of parts is required.

[0070] Specifically, refer to Figure 3 , Figure 8 and Fig. 9In the embodiment of the present invention, a fixed channel 321 is provided on the fuel gun guide rail 300, and the fixed end of the elastic plate 410 is curved; the two side walls opposite to the fixed end of the elastic plate 410 are elastically abutted 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 can absorb the impact and stress generated during operation, and ensure the stability of the position of the elastic plate 410 in the fixed channel 321, and prevent the elastic plate 410 from loosening or shifting during operation, thereby maintaining the overall stability of the device, and making maintenance and replacement simpler and more convenient.

[0071] It is also understandable that, with reference to Figure 3 , Figure 8 and Fig. 9 In the embodiment of the present invention, a second mounting groove 322 is provided on the fuel gun guide rail 300, and a second protrusion 3221 is provided on the side wall of the second mounting groove 322; a second connecting arm 422 and a connecting channel 423 are provided on the rubber member 420 along its width direction, and the connecting channel 423 is formed between the second connecting arm 422 and one end of the rubber member 420; the second connecting arm 422 is inserted into the second mounting groove 322, and the second protrusion 3221 extends into the connecting channel 423, and the second protrusion 3221 and the second connecting arm 422 overlap in their projections on the bottom of the second mounting groove 322 to limit the second connecting arm 422 from being separated from the second mounting groove 322.

[0072] Through the above-mentioned arrangement, the connection method ensures a firm connection between the rubber part 420 and the fuel gun guide rail 300, reducing the risk of loosening or detachment; since the second connecting arm 422 and the second protrusion 3221 at the bottom of the second mounting groove 322 overlap in projection, a mechanical locking mechanism is formed. The above-mentioned design features ensure that the second connecting arm 422 will not easily detach 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 component detachment is achieved through simple physical connections and geometric structures, without the need for complex mechanical devices or additional locking components.

[0073] Specifically, refer to Figure 3 and Figure 4, with reference to the figure, in the embodiment of the present invention, the gate bracket 210 is provided with a guide protrusion 217 and two positioning concave surfaces 218 along its length direction, and the two positioning concave surfaces 218 are respectively located on opposite sides of the guide protrusion 217, and the rubber component 420 is provided with a guide channel 424 along its length direction; the guide protrusion 217 is inserted into the guide channel 424, and the two opposite side walls of the rubber component 420 corresponding to the guide channel 424 are matched with the two positioning concave surfaces 218 one by one. When the rubber component 420 is inserted into the gate bracket 210 and the fueling gun guide rail 300, the guide protrusion 217 will be inserted into the guide channel 424, and the positioning concave surfaces 218 will be matched with the side walls of the rubber component 420, so that the relative position of the rubber component 420 on the gate bracket 210 will be accurately positioned, and at the same time, the stability between the rubber component 420 and the gate bracket 210 and the fueling gun guide rail 300 is ensured.

[0074] It is understandable that, referring to Figure 2 and Figure 3 In the embodiment of the present invention, the auxiliary gate unit includes a first sealing ring 510, which is located between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110, and the first sealing ring 510 is sleeved on the outer wall of the fueling gun rail 300, and the first sealing ring 510 is used to seal the gap between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110; wherein, the first sealing ring 510 is located between the first inlet and the drain port 120 to cut off the communication between the first inlet and the drain port 120. With the above structure, the first sealing ring 510 is arranged between the outer wall of the fueling gun rail 300 and the inner wall of the auxiliary gate chamber 110, filling the gap between the two and enhancing the sealing effect; since the first sealing ring 510 is located between the first inlet and the drain port 120, it realizes the isolation between the two positions, preventing the liquid from flowing back to the first inlet during drainage.

[0075] It is understandable that, referring to Figures 2 to 4 as well as Figure 8 In the embodiment of the present invention, the gate bracket 210 is provided with a plug-in protrusion 2191, and the fueling gun guide rail 300 is provided with a plug-in groove 323, wherein, in the first direction from the first inlet to the first outlet, the plug-in protrusion 2191 and the plug-in groove 323 are plug-fitted together, so that the upper parts of the two structures are stacked, thereby improving the assembly stability. Of course, in some embodiments, the gate bracket 210 may also be provided with a plug-in groove 323, and the fueling gun guide rail 300 may be provided with a plug-in protrusion 2191.

[0076] It should be noted that, in the present embodiment, the guide protrusion 217 and the two positioning concave surfaces 218 are both arranged on the outer side wall of the plug-in protrusion 2191 facing outwards, and the structure is compact and the design is reasonable.

[0077] It is understandable that, referring to Figures 2 to 4as well as Figure 8 In an embodiment of the present invention, a plurality of positioning grooves 130 are provided on the inner wall of the auxiliary gate housing 100, and the plurality of positioning grooves 130 are arranged at circumferential intervals. A plurality of elastic fixing members 2193 are provided on the gate bracket 210, and the plurality of elastic fixing members 2193 are arranged at intervals around the outer wall of the gate bracket 210, and the elastic fixing members 2193 are extended along the first direction; wherein each elastic fixing member 2193 is provided with an elastic fixing protrusion 21931, and the elastic fixing protrusion 21931 is arranged along the second direction, and the elastic fixing protrusion 21931 is located on a side wall of the elastic fixing member 2193 away from the gate channel 215. It can be understood that the multiple elastic fixing parts 2193 make the elastic fixing protrusions 21931 engage with the positioning grooves 130 under elastic deformation and resetting, so as to limit the relative movement between the gate bracket 210 and the auxiliary gate housing 100, thereby ensuring the accuracy and stability of the auxiliary gate housing 100 and the gate bracket 210 during installation and use, so that the gate bracket 210 can be effectively aligned and fixed in the desired position.

[0078] It is also understandable that, with reference to Figure 4 and Fig.10 In the embodiment of the present invention, the outer wall of the gate bracket 210 is provided with a first positioning portion 2192, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a first matching portion 140, and the first matching portion 140 is engaged with the first positioning portion 2192 to limit the circumferential rotation of the gate bracket 210 relative to the auxiliary gate chamber 110.

[0079] It can be understood that, referring to Figure 4 and Fig.10 The first positioning portion 2192 is an anti-rotation groove, and the first matching portion 140 is an anti-rotation rib. Specifically, in an embodiment of the present invention, the inner wall of the auxiliary gate housing 100 is provided with a plurality of anti-rotation grooves, and the plurality of anti-rotation grooves are extended along a first direction. A plurality of anti-rotation ribs are provided on the gate bracket 210, and the plurality of anti-rotation ribs are arranged at intervals around the outer wall of the gate bracket 210. The anti-rotation ribs are arranged along the first direction of the gate bracket 210, and the anti-rotation ribs correspond to the anti-rotation grooves one by one and are snap-fitted. By providing anti-rotation grooves and anti-rotation ribs, the auxiliary gate housing 100 and the gate bracket 210 can be effectively prevented from accidentally rotating or twisting during use, ensuring that the gate bracket 210 can remain stable in the correct position, which is beneficial to ensuring the normal operation of the auxiliary gate unit; the anti-rotation grooves are extended along the length direction, and the anti-rotation ribs are arranged on the gate bracket 210 along the length direction. They correspond one to one and are snap-fitted, which can increase the contact area between the gate bracket 210 and the auxiliary gate housing 100, improve the overall stability of the auxiliary gate unit, and enhance the connection.

[0080] Specifically, refer to Figures 7 to 10In this embodiment, the outer wall of the fueling gun guide rail 300 is provided with a second positioning portion 330, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a second matching portion 150, and the second matching portion 150 is engaged with the second positioning portion 330 to limit the circumferential rotation of the fueling gun guide rail 300 relative to the auxiliary gate chamber 110. During the installation process, the matching structure of the second positioning portion 330 and the second matching portion 150 plays a positioning and limiting role, ensuring the stable installation of the fueling gun guide rail 300, while preventing problems caused by rotation during use. It can be understood that the above-mentioned second positioning portion 330 is a protruding structure, the second matching portion 150 is a groove structure, or the two can be replaced with each other.

[0081] Specifically, refer to Figures 7 to 9 In an embodiment of the present invention, the fuel gun guide rail 300 is provided with a guide channel 340 passing through opposite ends, and the guide channel 340 is connected to the first outlet; wherein, along the first 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.

[0082] By adopting the above structure, by creating a channel with a gradually narrowing width in the guide channel 340, the insertion of the fuel gun can be controlled. The larger entrance opening can facilitate the insertion of the fuel gun head, especially at the beginning of insertion. The larger opening can reduce the requirements for the alignment accuracy of the fuel gun, making it easier for the operator to correctly insert the fuel gun into the guide rail. When the fuel gun continues to advance into the fuel gun guide rail 300, the gradually narrowing design of the channel helps to guide the fuel gun to align with the center line. The "centralization" effect can reduce the friction between the fuel gun and the inner wall of the fuel gun guide rail 300, reduce losses, and reduce possible deflection during the insertion process, ensuring that the fuel gun remains stable during operation, operates smoothly, and prevents swinging or loosening, thereby improving the safety and efficiency of the refueling operation.

[0083] Specifically, refer to Figures 7 to 10 In the embodiment of the present invention, at least one fixing structure 160 is provided on the auxiliary gate housing 100, and at least one elastic locking structure 350 is provided on the outer side wall of the fueling gun guide rail 300. The elastic locking structure 350 extends radially. Under the action of external force, the elastic locking structure 350 has a tendency to fit together with the outer side wall of the fueling gun guide rail 300; wherein, the elastic locking 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.

[0084] With the above structure, by setting the elastic retaining structure 350 on the outer side wall of the fuel gun guide rail 300, additional positioning support can be provided when the fuel gun is inserted, so that the fuel gun can maintain a stable position during the insertion process, which helps to reduce the operator's error and ensure that the fuel gun can be accurately inserted into the auxiliary gate housing 100; the radial extension design of the elastic retaining structure 350 can provide circumferential support during the fuel gun insertion process, reducing the swing or offset of the fuel gun in the fuel gun guide rail 300. It helps to ensure stability and safety during the refueling process; at the same time, the elastic retaining structure 350 and the fixed structure 160 can limit the rotation of the fuel gun guide rail 300 relative to the auxiliary gate housing 100. It can ensure that the fuel gun guide rail 300 maintains a fixed position and direction during use, prevents accidental rotation or movement, and improves the accuracy and safety of operation.

[0085] It is understandable that, referring to Figure 3 and Figure 7 In the embodiment of the present invention, the elastic positioning structure 350 is an elastic member, one end of which is connected to the outer side wall of the fueling gun guide rail 300, and the other end of the elastic member is spaced from the outer side wall. With the above structure, the presence of the elastic member simplifies the installation process, reduces the difficulty, and improves the accuracy, so that the installation of the entire fueling gun guide rail 300 and the auxiliary gate housing 100 is smoother and more reliable; due to the flexible characteristics of the elastic member, it can reduce the transmission of vibration between the fueling gun guide rail 300 and the housing, thereby reducing the impact of noise and vibration on the surrounding environment and users.

[0086] Specifically, refer to Figure 7 In the embodiment of the present invention, the elastic member includes a connecting portion 351 and a curved portion 352, one end of the connecting portion 351 is connected to the outer side wall of the fuel gun rail 300, and the other end of the connecting portion 351 is connected to the curved portion 352. With the above arrangement, one end of the connecting portion 351 is connected to the outer side wall of the fuel gun rail 300, which can provide a solid connection point to ensure that the fuel gun rail 300 is firmly installed on the fixed structure 160 of the auxiliary gate housing 100; the design of the curved portion 352 makes the elastic member have a certain flexibility and elasticity, which can absorb vibration and impact from the outside, reduce the impact of vibration on the fuel gun rail 300 and the auxiliary gate housing 100, and improve the stability and durability of the entire auxiliary gate unit; the elastic deformation of the curved portion 352 can adjust the alignment of the fuel gun rail 300 to a certain extent, so that it can be more accurately installed on the auxiliary gate housing 100, reducing the deviation that may occur during the installation process.

[0087] It should be noted that, refer to Figure 3In the embodiment of the present invention, the above-mentioned fixed structure 160 is a fixed opening that passes through the inside and outside of the auxiliary gate housing 100, and the bent portion 352 is inserted into the fixed opening, which is convenient for the assembler to observe the assembly status and to apply pressure to the bent portion 352 through the fixed opening. The bent portion 352 is elastically deformed to facilitate the disassembly and assembly of the fuel gun guide rail 300, and the operation is more convenient.

[0088] Specifically, in an embodiment of the present invention, the elastic member is an elastic plate body integrally formed with the guide rail body, which has a more secure connection and is less likely to loosen or fall off, thereby improving the reliability of the connection; it has better durability and can maintain its elasticity and bending properties for a longer time, thereby extending its service life; the installation process may be simpler and quicker, and no additional connecting parts or steps are required.

[0089] Specifically, in the embodiment of the present invention, there are two elastic locking structures 350, and the two elastic locking structures 350 are spaced apart on the outer side wall of the guide rail body to improve the reliability and stability of positioning. It can be understood that there are also two fixed structures 160, and the number of fixed structures 160 is adapted to the number of elastic locking structures 350. In some embodiments, there can also be one, three, etc. elastic locking structures 350, which are not limited here.

[0090] Specifically, refer to Figure 7 and Figure 8 In the embodiment of the present invention, a guiding curved surface 341 is provided on the inner side wall of the guiding channel 340, and the guiding curved surface 341 includes a first arc segment 3411, a second arc segment 3412 and a guiding segment 3413 which are connected in sequence; wherein, the angles between the first arc segment 3411, the second arc segment 3412 and the center line of the guiding channel 340 are both acute angles, and the guiding segment 3413 is parallel to the center line of the guiding channel 340, thereby reducing the resistance and friction that may be encountered during insertion; the guiding segment 3413 is parallel to the center line of the guiding channel 340, thereby ensuring the precise guidance of the refueling gun during the insertion process, avoiding deviation or skew, so that the refueling gun can accurately enter the target position, thereby ensuring the stability and safety of the refueling gun.

[0091] It is understandable that, referring to Figures 1 to 3 as well as Fig.10In the embodiment of the present invention, a water guide structure 170 is provided on the outer wall of the auxiliary gate housing 100. The water guide structure 170 is located at the lower side of the drain outlet 120. The water guide structure 170 is used to guide the water body to flow to the preset position. With the above structure, the design of the water guide structure 170 helps to guide the water body from the lower side of the drain outlet 120 to the preset position, prevents the water flow from overflowing or flowing to an inappropriate area, and improves the controllability and diversion of the water flow; it can make the water flow effectively flow to the target position, accelerate the drainage process, improve the drainage efficiency, thereby reducing the drainage time, and can also effectively prevent water accumulation, reducing the adverse effects of the water flow on the structure and the surrounding environment.

[0092] Specifically, in the embodiment of the present invention, the water guide structure 170 is a water guide boss protruding from the outer wall of the auxiliary gate housing 100. The design of the water guide boss can effectively guide water flow, reduce resistance and prevent water accumulation, thereby improving the efficiency and reliability of the drainage system.

[0093] Specifically, in the embodiment of the present invention, the width of the water-guiding boss is greater than the width of the drain port 120 , thereby improving the drainage capacity and stability and ensuring the normal operation and efficiency of the drainage system.

[0094] Specifically, refer to Fig.10 In the embodiment of the present invention, the upper side wall of the water guide boss is provided with a guide slope 171 for guiding the water body. The guide slope 171 can reduce the splashing phenomenon of the water flow during the flow process, and can also accelerate the flow speed of the water flow, so that the water flow can be drained faster, thereby improving the drainage efficiency of the drainage system.

[0095] Specifically, refer to Figures 1 to 3 In the embodiment of the present invention, the auxiliary gate housing 100 is provided with a plurality of buckle structures 180, and the plurality of buckle structures 180 surround the side wall of the auxiliary gate housing 100 and are arranged at intervals. During assembly, the auxiliary gate housing 100 is installed on the vehicle body near the fuel tank through the buckle structure 180, which enhances the stability and firmness of the overall structure. It can be understood that in the embodiment of the present invention, the plurality of buckle structures 180 are symmetrically arranged. This makes the force more evenly distributed, reduces the situation of excessive local force, and is conducive to extending the service life of the auxiliary gate housing.

[0096] Specifically, in an embodiment of the present invention, the snap-fit ​​structure 180 includes a snap-fit ​​groove 181 provided in the auxiliary gate housing 100 and a snap-fit ​​protrusion 182 located in the snap-fit ​​groove 181. With the above-mentioned arrangement, the snap-fit ​​structure 180 is composed of the snap-fit ​​groove 181 and the snap-fit ​​protrusion 182. The corresponding vehicle body is equipped with a corresponding snap-fit ​​structure, which can extend into the snap-fit ​​groove 181 and snap-fit ​​with the snap-fit ​​protrusion 182, providing a stable connection method to ensure the fixation between the auxiliary gate housing 100 and the vehicle body; in addition, due to the interval setting between the snap-fit ​​groove 181 and the snap-fit ​​protrusion 182, a certain elastic space is allowed, which can help absorb slight deformations caused by temperature changes or other external factors, reduce the risk of stress concentration, and better disperse force when subjected to vibration or impact, reduce the risk of looseness or damage between the auxiliary gate housing 100 and the vehicle body, and enhance durability.

[0097] Specifically, refer to Figures 1 to 3 In the embodiment of the present invention, the end wall of the auxiliary gate housing 100 is provided with a guiding slope 190, and the guiding slope 190 is arranged around the first inlet. Through the above structure, the design of the guiding slope 190 arranged around the first inlet can effectively guide the insertion of the refueling gun, improve the insertion accuracy and operation convenience, and reduce the possible damage risk, thereby optimizing the efficiency and safety of the refueling operation.

[0098] It is understandable that, referring to Figure 1 , Figure 2 as well as Figures 11 to 17 In the embodiment of the present invention, the main cover unit is fixedly matched with the auxiliary gate unit, and the main cover unit has a main cover chamber, and the opposite ends of the main cover chamber are respectively a second inlet and a second outlet, and the main cover chamber is used to guide the refueling gun to be inserted for refueling and limit the insertion stroke of the refueling gun; wherein the first outlet is docked and connected with the second inlet. Through the above structure, through a series of connected inlets and outlets, the refueling gun is guided to be inserted and its insertion stroke is limited, while ensuring the flow of the refueling medium.

[0099] Specifically, refer to Figure 1 and Figure 2 In the embodiment of the present invention, the capless refueling device includes a second sealing ring 520, and an annular protrusion is provided on the refueling gun guide 300. The annular protrusion is located at one end of the refueling gun guide 300 close to the first outlet, and the annular protrusion is arranged around the end opening of the refueling gun guide 300, wherein a part of the second sealing ring 520 is sleeved with the annular protrusion, and another part of the second sealing ring 520 is abutted with the main cover unit to seal the butt connection between the first outlet and the second inlet. Through the above structure, the butt connection between the first outlet and the second inlet is ensured to be sealed reliably, with an excellent sealing structure, and the leakage of fuel vapor to the outside of the fuel tank is suppressed.

[0100] It should be noted that, in the above embodiment, the first sealing ring 510 is a sealing rubber ring, and the second sealing ring 520 is a foam sealing ring. The foam sealing ring has good sealing performance, can fill and close irregular or incompletely fitting surfaces, and effectively prevent the penetration and leakage of gas or liquid. The foam sealing ring has a certain elasticity and softness, and can play a buffering and shock-absorbing effect under vibration or impact, thereby protecting components from damage.

[0101] It is understandable that, referring to Figures 11 to 17 In the embodiment of the present invention, the main cover unit includes: a main cover housing 600, the main cover housing 600 is provided with a main cover channel 610; a flow guide 700, the flow guide 700 is connected to the main cover housing 600, the flow guide 700 is provided with a flow guide channel 710, the flow guide channel 710 is communicated with the main cover channel 610 to form a main cover chamber; a valve structure 800, used to open or close the main cover channel 610, and the valve structure 800 can be automatically opened and pressure relief, the valve structure 800 and the main cover housing 600 are connected. The valve structure 800 is rotatably connected and is located inside the main cover channel 610. The valve structure 800 rotates relative to the main cover shell 600 to open or close the main cover channel 610. The port of the main cover channel 610 cooperates with the valve structure 800 to form a two-way valve. When the pressure in the main cover chamber is greater than a preset threshold value, the valve structure 800 automatically opens and relieves pressure in the main cover chamber, and the direction of pressure relief of the valve structure 800 is opposite to the direction in which the valve structure 800 opens the main cover channel 610.

[0102] The above structure is adopted to prevent the influence of the external environment and the intrusion of substances; the main cover channel 610 is opened and closed by the valve structure 800, and the pressure is automatically released when necessary to ensure that the pressure in the main cover chamber is within a safe range. When the pressure exceeds the preset threshold, that is, when the pressure inside the fuel tank is abnormal, the valve structure 800 is opened, and the valve structure 800 automatically opens to release the pressure, preventing the fuel tank from being damaged, so as to protect safe operation.

[0103] It should be noted that the second inlet is an opening at one end of the main cover channel 610 of the main cover shell 600, and the second outlet is an opening at the other end opposite to the guide channel 710 of the guide device 700.

[0104] Specifically, refer to Fig.11 , Fig.12 and Fig.15In the embodiment of the present invention, a limiting boss 620 is provided at the port of the main cover channel 610, and the limiting boss 620 is hollow; when the valve structure 800 rotates away from the limiting boss 620, the main cover channel 610 is opened, and when the valve structure 800 rotates toward the limiting boss 620, the valve structure 800 and the limiting boss 620 form a blocking cooperation to close the main cover channel 610, which can realize the opening and closing of the main cover channel 610, and has a sealing structure with excellent sealing performance, which can inhibit the leakage of fuel vapor to the outside of the fuel tank, and has the characteristics of simplicity and reliability.

[0105] Specifically, refer to Figures 11 to 14 In the embodiment of the present invention, the valve structure 800 includes: a lower cover 810, the lower cover 810 is located on one side of the inner surface of the limiting boss 620, and the lower cover 810 is rotatably connected to the main cover shell 600; an upper cover 820, the upper cover 820 is located in the hollow area of ​​the limiting boss 620, the upper cover 820 is connected to the lower cover 810, and the upper cover 820 and the lower cover 810 cooperate to form a pressure relief channel, and the interior of the main cover chamber is connected to the outside of the main cover chamber through the pressure relief channel; a valve body assembly 830, the valve body assembly 830 is movably arranged between the lower cover 810 and the upper cover 820, and the valve body assembly 830 has a closed state and a pressure relief state; when the valve body assembly 830 is in the closed state, the connection between the pressure inlet end and the pressure relief end of the pressure relief channel is cut off; when the pressure in the main cover chamber is greater than the preset threshold value, the valve body assembly 830 is in the pressure relief state, and the valve body assembly 830 releases the cutoff of the pressure inlet end and the pressure relief end relative to the pressure relief channel. The upper structure and the automatic response mechanism are helpful to ensure that the fuel tank and the main cover unit will not be damaged or in danger when the pressure is too high, providing safety protection; the lower cover 810 is rotatably connected to the main cover shell 600, which helps to adjust and flexibly operate the valve structure 800.

[0106] Specifically, refer to Fig.13 and Fig.14In the embodiment of the present invention, the lower cover 810 is provided with a lower chamber 811, the upper cover 820 is provided with an upper chamber 821, the lower cover 810 and the upper cover 820 are nested and fixed, and the lower chamber 811 and the upper chamber 821 cooperate to form a valve body chamber, the valve body assembly 830 is movably installed in the valve body chamber, and there is a spacing between the two opposite end surfaces of the upper cover 820 and the lower cover 810 to form a pressure relief gap, the lower cover 810 is provided with a pressure inlet hole 812, and the pressure inlet hole 812 passes through the bottom wall of the lower chamber 811, and the pressure relief gap The gap, the valve body chamber and the pressure inlet hole 812 are connected in sequence to form a pressure relief channel; wherein, when the valve body assembly 830 is in a closed state, the external pressure on 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 on 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. The above structure helps to prevent damage caused by overpressure, and the pressure is controlled and released; the automatic adjustment mechanism reduces the need for manual intervention and improves safety and reliability.

[0107] Specifically, refer to Fig.13 and Fig.14 In the embodiment of the present invention, the valve body assembly 830 includes: a valve body 831, the valve body 831 is movably arranged in the valve body chamber, the valve 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, and is used to seal the pressure inlet hole 812; a valve body reset member 833, one end of the valve body reset member 833 is installed on the valve body 831, and the other end of the valve body reset member 833 is installed on the valve body 831, and the valve body reset member 833 is used to drive the valve body 831 to abut against the bottom wall of the valve body chamber, thereby improving the stability of the entire valve structure 800 and preventing the valve body 831 from becoming unstable due to external force or pressure changes. In addition, the automatic reset feature also plays a positive role in safety, ensuring that the valve body 831 can close automatically in certain unexpected situations.

[0108] Specifically, refer to Fig.13 and Fig.14In the embodiment of the present invention, the valve body 831 is provided with a mounting cavity 8311, the bottom wall of the upper chamber 821 is provided with a mounting protrusion 8211, and the valve body reset member 833 is a spring, one end of the spring abuts against the mounting cavity 8311, and the other end of the spring is sleeved on the mounting protrusion 8211. Through the above arrangement, the spring can generate elastic force when the valve body 831 moves, and the elastic force can push the valve body 831 to automatically return to the initial closed position, ensuring that the valve body 831 is quickly reset after the closing operation, having better automation capabilities during operation, ensuring the sealing effect of the pressure inlet hole 812, and the design of the entire structure provides stable force transmission and reset effects, which helps to ensure the stability and reliability of the valve body 831 during use; at the same time, the design and application of the spring can reduce the friction and impact between the valve body 831 and other components, thereby extending the service life of the valve body assembly 830.

[0109] It is understandable that, referring to Fig.13 and Fig.14 In the embodiment of the present invention, the valve body sealing layer 832 includes a sealing body 8321 and a mounting column 8322 connected to the sealing body 8321, and the mounting column 8322 has a clamping section and a limiting section; the bottom wall of the mounting cavity 8311 is provided with a mounting hole, and the mounting column 8322 is penetrated through the mounting hole, wherein the clamping section corresponds to the mounting hole, 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, ensuring the stable installation of the valve body sealing layer 832 on the valve body, thereby effectively realizing the sealing function and preventing leakage; the design of the mounting column 8322 and the limiting section improves the fixing degree of the valve body sealing layer 832 on the valve body 831, and enhances the overall structural strength and durability of the entire valve structure 800.

[0110] It should be noted that, in the embodiment of the present invention, the valve body sealing layer 832 is an elastic rubber sealing member, which can adapt to the irregularities on the surface of the valve body 831, and can effectively improve the sealing performance, durability and adaptability of the valve structure 800. Of course, the valve body sealing layer 832 can also be made of other materials, which is not limited here.

[0111] It is understandable that, referring to Fig.13 and Fig.14In the embodiment of the present invention, the upper cover 820 is provided with a first annular plug-in boss 822, which is arranged around the upper chamber 821, and a first plug-in gap is provided between the outer wall of the first plug-in boss 822 and the outer wall of the upper cover 820, and an assembly protrusion 823 is provided on the outer wall of the first plug-in boss 822, and the assembly protrusion 823 is located in the first plug-in gap; the lower cover 810 is provided with a second annular plug-in boss 813, which is arranged around the lower chamber 811, and the outer wall of the second plug-in boss 813 is connected to the lower chamber 811. A second plug-in gap is provided between 811, the second plug-in boss 813 is provided with an assembly arm 814, and the assembly arm 814 is provided with an assembly hole 8141; wherein, the first plug-in boss 822 is inserted in the second plug-in gap, and there is a spacing between the end face of the first plug-in boss 822 and the bottom wall of the lower cover 810, the second plug-in boss 813 is arranged corresponding to the second plug-in gap, and the assembly arm 814 is inserted in the second plug-in gap, and the assembly hole 8141 is snap-fitted with the assembly protrusion 823 to limit the lower cover 810 and the upper cover 820 from moving back to back in the first direction.

[0112] Through the above structure, the first plug-in boss 822 is inserted into the second plug-in gap, and the assembly arm 814 is also inserted into the second plug-in gap. The embedded structure can ensure the firm connection between the upper cover 820 and the lower cover 810, thereby maintaining the stability of the overall structure; the assembly hole 8141 and the assembly protrusion 823 are engaged with each other, and this design can limit the back movement between the upper cover 820 and the lower cover 810 in the first direction. In other words, the upper cover 820 and the lower cover 810 will not be separated or moved in the connection direction, thereby ensuring the integrity of the structure; the above structure simplifies the assembly process of the upper cover 820 and the lower cover 810. It is only necessary to match the first plug-in boss 822 with the second plug-in boss 813, and the assembly hole 8141 is engaged with the assembly protrusion 823 to complete the assembly. The assembly efficiency can be improved; at the same time, the first plug-in boss 822 surrounds the upper chamber 821, and the second plug-in boss 813 surrounds the lower chamber 811, and through clearance fit, it helps to form a good seal between the upper cover 820 and the lower cover 810.

[0113] Specifically, refer to Fig.13 and Fig.14 In the embodiment of the present invention, an arc-shaped pushing concave surface 824 is provided on one end surface of the upper cover 820 which is 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.

[0114] Through the above settings, the design of the push concave surface 824 enables the refueling gun to be compatible with the upper cover 820, ensuring that the refueling gun can be correctly inserted and connected to the fuel tank, which can improve the smoothness and efficiency of the refueling operation; the push concave surface 824 not only enables the refueling gun to adapt to the correct position, but also can position the refueling gun. Through the shape and position of the push concave surface 824, the refueling gun can be accurately positioned on the upper cover 820, ensuring that the refueling port and the refueling gun are correctly connected during the refueling process, avoiding operational errors; with the push concave surface 824, the refueling operation becomes more convenient and simple, and the correct positioning and connection can be completed by simply inserting the refueling gun into the position where the push concave surface 824 is located, without the need for additional adjustments or operations, which improves the convenience and user experience of the refueling process.

[0115] Specifically, refer to Figures 11 to 15 In an embodiment of the present invention, a main shaft 530 and a main cover spring 540 are provided on the main cover shell 600. The main cover spring 540 is sleeved on the main shaft 530. The lower cover 810 of the valve structure 800 is rotatably connected to the main shaft 530. The main cover spring 540 is used to drive the valve structure 800 to rotate and close the main cover channel 610 to a preset position.

[0116] With the above structure, the main cover spring 540 is sleeved on the main shaft 530 and connected to the valve structure 800. The elastic design of the above structure can reduce mechanical impact and wear and extend the life of the valve structure 800. The automatic closing function can also reduce the mechanical loss caused by the long-term opening of the valve, ensuring that the main cover channel 610 can close automatically when not needed, thereby increasing safety and reliability. By driving the main cover spring 540, it can be ensured that the valve structure 800 is fitted to the preset position with appropriate pressure, thereby enhancing the sealing effect. This reduces the user's operating burden and improves ease of use.

[0117] Specifically, refer to Figures 11 to 15 In an embodiment of the present invention, the main cover shell 600 is provided with a first opening 630 and a second opening 640, the main shaft 530 has a limiting head and a mounting shaft portion connected to the limiting head, the mounting shaft portion is plugged into the main cover shell 600, and the limiting head is located in the first opening 630, and the end of the mounting shaft portion away from the limiting head is located in the second opening 640; wherein, the main cover shell 600 is provided with a stopping structure 650, the stopping structure 650 is used to limit the movement of the main shaft 530 relative to the main cover shell 600, so that the main shaft 530 can be accurately installed and positioned on the main cover shell 600, ensuring the correct assembly and position of the main shaft 530; after installation, the main shaft 530 will not shift or loosen under the action of the stopping structure 650, thereby improving the stability and reliability of the overall assembly.

[0118] 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.

[0119] It is understandable that, referring to Figure 2 , Figures 11 to 15 In the embodiment of the present invention, a main cover sealing layer 550 is provided between the upper cover 820 and the lower cover 810. When the valve structure 800 closes the main cover channel 610, the main cover sealing layer 550 is configured to seal the valve structure 800 and the main cover channel 610. With the above structure, when the valve structure 800 closes the main cover channel 610, the main cover sealing layer 550 acts as a sealing device, ensuring the sealing of the main cover channel 610, i.e., the main cover chamber, after the valve structure 800 is closed, thereby improving reliability and inhibiting the leakage of fuel vapor to the outside of the fuel tank; in addition, the main cover sealing layer 550 can not only prevent leakage, but also reduce friction and wear between the valve structure 800 and the main cover channel 610, thereby improving durability, extending service life, and reducing the frequency of maintenance and replacement.

[0120] Specifically, in an embodiment of the present invention, when the valve structure 800 rotates away from the limiting boss 620, the main cover channel 610 is opened; when the valve structure 800 rotates toward the limiting boss 620, the main cover sealing layer 550 abuts against the limiting boss 620 to close the main cover channel 610, thereby achieving sealing, easy operation and reliability.

[0121] Specifically, in an 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 800, save space, and be suitable for various application scenarios; the installation and maintenance of the valve structure 800 are simpler, and the main cover sealing layer 550 can be easily disassembled and replaced without cumbersome operating steps, thereby reducing the difficulty and cost of maintenance.

[0122] Specifically, refer to Figure 12 to Figure 14In the embodiment of the present invention, an assembly groove 815 and a support end face 816 are provided on the end of the lower cover 810 facing the upper cover 820, and the assembly groove 815 and the support end face 816 surround the second plug-in boss 813 in sequence from the inside to the outside, and a limiting end face 825 is provided on the end of the upper cover 820 facing the lower cover 810, and the support end face 816 and the assembly groove 815 are both spaced apart from the limiting end face 825, and the assembly groove 815 and the limiting end face 825 are correspondingly arranged; wherein, the main cover sealing layer 550 comprises an assembly section 551 and a sealing section 552 connected to the assembly section 551, the assembly section 551 is sleeved on the second plug-in boss 813, and the assembly section 551 is accommodated in the assembly groove 815, the sealing section 552 is attached to the support end face 816, and the spacing between the limiting end face 825 and the upper edge of the side wall of the assembly groove 815 is less than the thickness of the assembly section 551.

[0123] With the above structure, the assembly section 551 of the main cover sealing layer 550 is sleeved on the second plug-in boss 813 and accommodated in the assembly groove 815, and the sealing section 552 is fitted to the support end face 816. The above structural design provides a high sealing performance, ensures good fit and effective sealing after assembly, and avoids leakage of fluid or gas; the fit of the sealing section 552 and the sleeve of the assembly section 551 enable the main cover sealing layer 550 to maintain a stable and accurate positioning in the assembly groove 815, enhance the reliability of the valve structure 800, and reduce the problems that may be caused by inaccurate assembly; because the assembly section 551 is accommodated in the assembly groove 815, the main cover sealing layer 550 is not easily affected by external forces during operation, thereby enhancing its durability and service life; the whole structure is more compact, space-saving, suitable for various application scenarios, and the installation process is simple and convenient. During maintenance, due to the clear structure, it is easier to disassemble and replace the main cover sealing layer 550, and it also protects the inside of the main cover unit from the influence of the external environment, improving stability and durability.

[0124] It should be noted that in the embodiment of the present invention, the main cover sealing layer 550 is a sealing rubber pad. The sealing material generally has good elasticity and durability, and can maintain its sealing performance for a long time without being easily damaged or aged. In addition, the sealing rubber pad also has corrosion resistance, high temperature resistance and chemical resistance, and is suitable for sealing requirements in various environments and working conditions. Therefore, using the sealing rubber pad as the main sealing layer can effectively ensure the sealing of the main cover channel 610 and the valve structure 800, and improve reliability.

[0125] It is understandable that, referring to Fig.11In an embodiment of the present invention, the main cover unit is provided with a gas circulation structure, which runs through the inside and outside of the main cover chamber; wherein the inside of the main cover chamber and the end openings of the main cover chamber are both connected to the gas circulation structure, so that the gas circulates inside and outside between the main cover chamber and the gas circulation structure.

[0126] With the above structure, since the gas circulation structure passes through the inside and outside of the main cover shell 600, the above design can ensure that the gas flows smoothly between the main cover chamber and the gas circulation structure, forming a stable gas circulation. When the gas can circulate freely between the main cover chamber and the outside, it helps to maintain the pressure balance between the inside and outside of the chamber and avoid structural damage caused by pressure differences.

[0127] Specifically, refer to Fig.11 and Fig.12 In the embodiment of the present invention, the gas circulation structure includes a first gas circulation port 910, which is disposed between the side wall of the main cover housing 600 and the side wall of the deflector 700, and the first gas circulation port 910 corresponds to the main cover chamber. With the above structure, the gas flows smoothly by providing the first gas circulation port 910, and the structure is simple and easy to manufacture.

[0128] Specifically, refer to Fig.11 and Fig.12 In the embodiment of the present invention, the gas circulation structure further includes a second gas circulation port 920, which is opened on the side wall of the main cover shell 600, and corresponds to the main cover chamber; wherein the second gas circulation port 920 and the second gas circulation port 920 are arranged at intervals. With the above structure, the second gas circulation port 920 is also provided to cooperate with the first gas circulation port 910, and the pressure can be further fully adjusted, so that the gas flow can be more evenly distributed, and the possible local gas pressure or temperature changes can be reduced, so as to optimize the gas circulation structure and improve flexibility, stability and safety.

[0129] It should be noted that, in the embodiment of the present invention, the first gas circulation port 910 and the second gas circulation port 920 are respectively located on the opposite side walls of the main cover chamber, which can better balance the flow of gas in the main cover chamber, help reduce the local pressure or temperature difference of the gas, and thus improve stability and performance; it can avoid the space limitations that may be caused by the concentrated installation of multiple gas circulation ports on the same side wall of the main cover shell 600, thereby more flexibly designing and laying out other components of the system.

[0130] It should also be noted that, in the embodiment of the present invention, the position of the valve structure 800 that closes the main cover chamber is higher than the position of the gas circulation structure on the main cover shell 600, which can reduce the interference of the valve structure 800 on the gas circulation structure. When the valve structure 800 needs to be operated or maintained, it will not affect the gas circulation structure, thereby ensuring normal operation.

[0131] Specifically, refer to Figure 2 , Fig.11 and Fig.12 In the embodiment of the present invention, the outer wall of the main cover housing 600 is sleeved with a main cover sealing ring 560. In the first direction, the main cover sealing ring 560 is located on the main cover housing 600 at a position higher than the position where the valve structure 800 closes the main cover chamber. With the above arrangement, when the main cover channel 610, i.e., the main cover chamber is closed, the main cover sealing ring 560 is at a higher position, which helps to improve the sealing performance between the refueling pipe and the main cover housing 600, can effectively prevent gas or liquid from leaking from the main cover chamber to the external environment, maintain airtightness, and reduce the risk of damage or accidental destruction of the main cover sealing ring 560.

[0132] Specifically, refer to Fig.11 In the embodiment of the present invention, the inner side wall of the main cover housing 600 is provided with a first annular step 661, a second annular step 662 and a third annular step 663. In the first direction, the first annular step 661, the second annular step 662 and the third annular step 663 are in a step structure that descends from the outside to the inside in sequence; wherein the center line of the first annular step 661 coincides with the center line of the main cover chamber, and the second annular step 662 and the third annular step 663 are both offset from the center line of the main cover chamber. With the above structure, the width of one side of the step structure is greater than the width of the other side, so as to provide an installation position for the main shaft 530 and the main cover spring 540, and prevent the installation position of the main shaft 530 and the main cover spring 540 from being blocked and damaged, thereby playing a protective role.

[0133] It is understandable that, referring to Fig.11 , Fig.12 , Fig.16 and Fig.17 In the 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.

[0134] It is understandable that, referring to Fig.16 and Fig.17 In the embodiment of the present invention, the guide structure 720 is a guide boss, and a guide arc surface 721 is provided on a side wall of the guide boss facing the center of the guide channel 710, and the distance between the guide arc surface 721 and the inner side wall of the guide 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 role of the guide arc surface 721 is to provide a guiding surface when the fuel gun is inserted, ensuring that the fuel gun can be accurately inserted into the guide channel 710; and the distance between the guide arc surface 721 on the guide boss and the inner side wall of the guide 700 is gradually increased 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 of the fuel gun, ensuring that the fuel gun can be smoothly inserted into the guide channel 710.

[0135] It is understandable that, referring to Fig.16 and Fig.17 In the embodiment of the present invention, a side wall of the limiting structure 730 facing the center of the flow guiding channel 710 is provided with a limiting step 731, and the limiting step 731 is concave. When the fueling gun is inserted, it abuts against the limiting step 731, which serves to provide a reference point or structure for limiting the insertion depth, ensuring that the fueling gun is inserted into the correct position of the flow guiding channel 710, with a simple structure, stability and reliability.

[0136] Specifically, refer to Fig.16 and Fig.17 In the embodiment of the present invention, the lowest position of the guiding arc surface 721 is aligned with the lowest position of the limiting step 731, which ensures the maximum insertion depth of the refueling gun during insertion, simplifies the operation process, and makes it easier for refueling personnel to understand and master the correct insertion depth during use, reduces the possibility of operational errors, and helps to ensure a good connection between the refueling gun and the guide channel 710 to avoid leakage or other safety hazards.

[0137] Specifically, refer to Fig.16 and Fig.17 In the embodiment of the present invention, the limiting structure 730 is a limiting boss 620, which is arranged along the length direction of the deflector 700, wherein the upper end surface of the limiting boss 620 and the upper end surface of the insertion end of the corresponding flow guide channel 710 on the deflector 700 have an avoidance spacing, and the lower end surface of the limiting boss 620 extends to the lower end surface of the outlet end of the corresponding flow guide channel 710 on the deflector 700. The setting of the avoidance spacing can provide enough space for the refueling gun, so that it can be smoothly inserted into the flow guide channel 710 without hindrance, ensuring the smooth progress of the refueling operation.

[0138] Specifically, in the embodiment of the present invention, there are multiple limiting structures 730, and the multiple limiting structures 730 are spaced and arranged relatively to improve the stability of the limiting. Specifically, in the embodiment of the present invention, the guide structure 720 is located between two adjacent limiting structures 730, which further improves the stability of the limiting, can effectively optimize the refueling operation process, and improve the safety and efficiency of the operation.

[0139] Specifically, in the embodiment of the present invention, the inner diameter of the flow guide 700 gradually decreases along the first direction from the insertion end to the outlet end. With the above structure, since the inner diameter of the flow guide 700 gradually decreases, the flow of oil inside the flow guide 700 will be restricted and guided, thereby improving the flow efficiency of the fluid.

[0140] It is also understandable that, with reference to Fig.16 and Fig.17 In the embodiment of the present invention, the flow guide 700 is further provided with a spoiler structure 740, which is located in the flow guide channel 710 and is used to slow down the outflow speed of the oil at the outlet end of the flow guide channel 710; wherein, the spoiler structure 740 is arranged on the inner wall of the flow guide channel 710 along the length direction of the flow guide 700. With the above structure, the spoiler structure 740 blocks the oil when it just comes out, thereby slowing down the speed of the fluid passing through the outlet end of the flow guide channel 710, ensuring that the flow of the fluid near the outlet is more stable and controllable, and can effectively reduce the splashing and splashing phenomenon when the fluid flows out, which helps to reduce energy consumption and reduce the waste of fluid, and conforms to the concept of energy saving and environmental protection.

[0141] Specifically, refer to Fig.16 and Fig.17 In the embodiment of the present invention, the spoiler structure 740 is a spoiler rib connected to the deflector 700, and the spoiler rib is convexly arranged toward the center line of the deflector channel 710. Through the above arrangement, the spoiler rib is directly connected to the deflector 700 and convexly arranged toward the center line, which enhances the stability and rigidity of the deflector 700, reduces the possibility of vibration and deformation, makes maintenance and cleaning more convenient, reduces the workload and time cost of maintenance personnel, and improves the overall economy and sustainability.

[0142] Specifically, in an embodiment of the present invention, there is a spacing between the lower end surface of the spoiler rib and the lower end surface of the outlet end of the corresponding guide channel 710 on the deflector 700, so that the oil can be gathered in the spacing area and flow stably into the fuel tank before entering the fuel tank after being acted upon by the spoiler rib.

[0143] Specifically, in the embodiment of the present invention, a side wall of the spoiler rib facing the center line of the guide channel 710 is parallel to the center line of the guide channel 710 , which has a simple structure and is easy to manufacture.

[0144] Specifically, in the 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.

[0145] Specifically, in the embodiment of the present invention, there are multiple groups of spoiler structures 740, which are spaced apart on the inner wall of the guide channel 710, which helps to disperse the pressure of the oil fluid, improve energy efficiency, and improve flow stability and controllability.

[0146] Specifically, in the embodiment of the present invention, the inner wall of the flow guide channel 710 includes a first straight section 711, an inclined guide section 712, and a second straight section 713, which are sequentially arranged along the length direction of the flow guide 700. Through the above structure, the first straight section 711 can guide the fluid into the flow guide channel 710, the inclined guide section 712 can guide the fluid to the downstream direction and accelerate the flow speed of the fluid, and the second straight section 713 is used to stabilize the flow of the fluid, so that it forms a stable flow state inside the flow guide 700.

[0147] It is also understandable that, with reference to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17 In the embodiment of the present invention, the outer wall of the deflector 700 is provided with an elastic positioning structure 750, which is used to abut against the fuel pipe to limit the relative installation position of the deflector 700 and the fuel pipe; wherein the elastic positioning structure 750 can follow the movement of the deflector 700 and can adaptively adjust its relative angle with the outer wall of the deflector 700. During installation, the deflector 700 is installed on the fuel pipe, and the elastic positioning structure 750 is elastically deformed and reset to limit the final installation position of the deflector 700, which can reduce the difficulty and complexity of the installation process of the deflector 700 and the fuel pipe, making the installation more simple and efficient. In some cases, for example, since the elastic positioning structure 750 is elastic, a small-diameter fuel pipe can also achieve an expanded diameter shape to adapt to various sizes of fuel pipes.

[0148] It should be noted that the above-mentioned small-diameter fueling pipe can also realize an expanded diameter shape. It can be understood that the relevant fueling pipe is composed of two parts, a large diameter and a small diameter. The large diameter part and the small diameter part need to be welded and fixed, and the elastic positioning structure 750 is used for setting. Therefore, the small diameter part of the fueling pipe can be expanded to a size with a slope close to that of the large diameter part. Therefore, the large diameter part and the small diameter part after the expansion of the fueling pipe do not need to be welded, and can be processed and manufactured using a bobbin, thereby reducing the overall cost.

[0149] Specifically, refer to Fig.16 and Fig.17 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.

[0150] Specifically, refer to Fig.16 and Fig.17 In the embodiment of the present invention, the elastic positioning member includes a connecting section 751 and a positioning section 752. One end of the connecting section 751 is connected to the outer wall of the deflector 700, and the other end of the connecting section 751 is connected to the positioning section 752. The connecting section 751 is inclined relative to the center line of the guide channel 710, and the positioning section 752 is abutted against the inner wall of the fuel pipe to limit the relative installation position of the deflector 700 and the fuel pipe. Through the above arrangement, the combination of the connecting section 751 and the positioning section 752 reduces the complexity of the elastic positioning member and facilitates manufacturing.

[0151] Specifically, in the 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.

[0152] Specifically, in the embodiment of the present invention, there are two elastic positioning structures 750, which are spaced apart on the outer wall of the deflector 700, which helps to improve the installation stability of the refueling pipe and the deflector 700. Of course, the number of the elastic positioning structures 750 is not limited here, and can also be one, three, etc.

[0153] Specifically, refer to Fig.16 and Fig.17 In an embodiment of the present invention, the guide 700 is provided with a notch 760, and the notch 760 is arranged on the side wall of the guide 700 along the first direction, and the notch 760 extends to the end face of the guide channel 710 on the guide 700 corresponding to the outlet end and is connected; when the side wall of the guide channel 710 on the guide 700 corresponding to the outlet end is subjected to external force, the side walls of the guide 700 corresponding to the two sides of the notch 760 are close to each other, so as to reduce the outer diameter of the side wall of the guide channel 710 on the guide 700 corresponding to the outlet end.

[0154] By adopting the above structure, the outer diameter of the side wall of the deflector 700 corresponding to the outlet end of the guide channel 710 can be elastically reduced, so that the deflector 700 is adapted to some smaller diameter refueling pipes; at the same time, the role of the notch 760 is not only to shrink the mouth, but also to cooperate with the gas circulation structure to assist gas circulation. It can be understood that the gas can not only flow through the outlet end of the guide channel 710, but also flow through the notch 760.

[0155] Specifically, refer to Fig.16 In the 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, the second wall thickness 772 is located between the first wall thickness 771 and the third wall thickness 773, and the thicknesses of the first wall thickness 771 and the third wall thickness 773 are both smaller than the second wall thickness 772, the thickness of the first wall thickness 771 gradually increases toward the second wall thickness 772, and the thickness of the third wall thickness 773 gradually decreases away from the second wall thickness 772; wherein, when an external force acts on the side wall of the 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, and 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 device 700 can achieve elastic deformation, which is convenient for reducing the caliber, saving time and effort, and can adapt to some smaller diameter refueling pipes.

[0156] Specifically, in an embodiment of the present invention, the deflector 700 is provided with a deflector gas 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 deflector gas concave edge and the deflector gas cooperate to form a first gas circulation port 910, so that the gas can circulate inside and outside the deflector 700 and the main cover shell 600, with a simple structure and easy manufacturing.

[0157] It is also understandable that, with reference to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17In the embodiment of the present invention, the main cover shell 600 and the deflector 700 are split structures. When the force in the direction of separation of the main cover shell 600 and the deflector 700 is less than the preset force, the two remain in the docking state; and when the force in the direction of separation of the main cover shell 600 and the deflector 700 is greater than the preset force, the two are separated. With the above structure, the main cover shell 600 and the deflector 700 are set to be split. Therefore, when the fuel gun is inserted with the wrong force, the main cover shell 600 and the deflector 700 are separated. When the fuel gun is vibrated or subjected to external forces, it will stop discharging oil or stop refueling. Therefore, it can be understood that the separation of the main cover shell 600 and the deflector 700 can play a prompting role and improve safety performance. At the same time, the split structure also facilitates the replacement of the main cover shell 600 and the deflector 700 with corresponding sizes, thereby improving adaptability and flexibility.

[0158] Specifically, refer to Figure 1 , Figure 2 , Fig.11 and Fig.12 In the embodiment of the present invention, the main cover housing 600 and the deflector 700 are detachably connected together through a connection structure, so that the device can be assembled and disassembled as needed, thereby increasing flexibility and being easier to adapt to different working scenes or needs. Different types or sizes of deflectors 700 or main cover housings 600 can be replaced as needed.

[0159] Specifically, refer to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17 In the embodiment of the present invention, the connection structure includes a connection protrusion 670 and a connection groove 780, wherein the connection protrusion 670 is provided on the end of the main cover shell 600 opposite to the deflector 700, and the connection groove 780 is provided on the end of the deflector 700 opposite to the main cover shell 600; wherein the connection protrusion 670 and the connection groove 780 are snap-fitted, and the projections of the opposite ends of the main cover shell 600 and the deflector 700 overlap. Of course, in some embodiments, the above-mentioned connection protrusion 670 can also be provided on the deflector 700, and the connection groove 780 is provided on the main cover shell 600, which is not limited here.

[0160] Through the above arrangement, the connection protrusion 670 and the connection groove 780 are snap-fitted to ensure the stability and safety of the connection. This can prevent the main cover unit from loosening or falling off during operation, ensuring normal operation; the projections of the opposite ends of the main cover shell 600 and the deflector 700 overlap, which can increase the tightness and stability of the connection and further improve reliability.

[0161] Specifically, refer to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17 In the embodiment of the present invention, the connection protrusion 670 is configured to be able to swing elastically relative to the middle of the main cover chamber. With the above structure, since the connection protrusion 670 has the characteristics of elastic swinging, it can move relatively freely in the middle of the main cover shell 600. When disassembling, the connection protrusion 670 can be swung to a position convenient for disassembly by applying appropriate force, thereby simplifying the disassembly process, reducing the difficulty of disassembly, and reducing the waste of manpower and time; at the same time, the connection protrusion 670 can reduce the friction with the main cover shell 600 or other components when swinging, thereby protecting the integrity and durability of the connection structure.

[0162] Specifically, refer to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17 In 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 on the end of the deflector 700 opposite to the main cover shell 600. 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 structure of the end portion of the main cover shell 600 opposite to the deflector 700 is sheathed on the outer wall of the deflector 700, and the other part is embedded in the inner wall of the deflector 700.

[0163] Through the above structure, the contact area between the components can be increased by mutual insertion. After connection, of the two components of the main cover shell 600 and the deflector 700, a part of the structure of the main cover shell 600 is exposed on the outer wall of the deflector 700, while the other part is embedded in the inner wall of the deflector 700, which not only provides external protection and coverage, but also ensures a stable connection inside. It is very important to ensure the sealing and waterproofness between the components.

[0164] Specifically, in the embodiment of the present invention, a limiting boss 7911 is provided in the second plug-in recess 791, and the limiting boss 7911 is provided with a limiting slope, which is inclined to the bottom surface of the second plug-in recess 791, and the limiting slope is connected to a side surface of the second plug-in recess 791 and is vertically arranged to form a limiting groove, wherein the two adjacent side surfaces on the first plug-in protrusion 682 are vertically arranged and plug-in cooperate with the limiting groove, which helps to provide additional safety protection, avoid accidents or damages, and increase the stability and firmness of the connection.

[0165] Specifically, refer to Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.16 and Fig.17 In the embodiment of the present invention, the main cover shell 600 is provided with an insertion port 691, which is arranged to extend along the first direction; the deflector 700 is provided with an insertion convex strip, and the boss is arranged to extend along the first direction, and multiple insertion bosses are plugged in and matched with multiple insertion ports one by one, thereby further limiting the relative rotation of the main cover shell 600 and the deflector 700, and improving the stability of the installation. It should be noted that the insertion convex strip is the upper part structure of the spoiler rib, and the main cover shell 600 is provided with an avoidance port 692 that is plugged in and matched with the guide boss, which also improves the stability of the installation.

[0166] It should be noted that, in this embodiment, the above-mentioned guide structure 720 and the limit structure 730 both have a certain flow-disturbing effect. Specifically, in the embodiment of the present invention, there are multiple insertion ports 691 and multiple insertion convex strips; multiple insertion ports 691 are distributed at intervals on the side wall of the main cover shell 600 corresponding to the first insertion recess 681, and the insertion ports 691 are connected to the first insertion recess 681; multiple insertion convex strips are distributed at intervals on the inner side wall of the deflector 700 corresponding to the second insertion protrusion 792, and multiple insertion bosses are plugged in and matched with multiple insertion ports 691 one by one. The above-mentioned arrangement can ensure that the connection between the main cover shell 600 and the deflector 700 is stable and not easy to deflect, making the assembly process easier.

[0167] 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 automobile, the auxiliary gate unit cover is arranged on part of the structure of the main cover unit, the main cover unit is inserted into the refueling pipe of the fuel tank, and the auxiliary gate unit cover is installed on the body of the automobile.

[0168] 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.

[0169] 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 800 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.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A capless refueling auxiliary gate unit, characterized in that: include: A secondary gate housing (100), the secondary gate housing (100) is provided with a secondary gate chamber (110) and a drain port (120), opposite ends of the secondary gate chamber (110) are respectively a first inlet and a first outlet, and the secondary gate chamber (110) is used for inserting a refueling gun; A gate structure (200) is used to open or close the first inlet, and the gate structure (200) is fixedly arranged inside the auxiliary gate chamber (110); A refueling gun guide rail (300) is used to guide the movement of the refueling gun, and is provided with a drainage channel (310) that is in communication with the drainage port (120). The refueling gun guide rail (300) is fixedly arranged inside the auxiliary gate chamber (110). The refueling gun guide rail (300) is located on one side of the gate structure (200), and a part of the structure of the refueling 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 an inner wall of one end of the auxiliary gate chamber (110), and the other end of the gate structure (200) abuts against an end of the fuel gun guide rail (300); Wherein, when the gate structure (200) is subjected to the push force of the refueling gun, the first inlet is opened, and the opening direction of the gate structure (200) is towards the location of the first outlet; after the gate structure (200) is out of contact with the refueling gun, the first inlet is closed, and the closing direction of the gate structure (200) is towards the location of the first inlet; The auxiliary gate unit further comprises a blocking mechanism (400), which is arranged on the fueling gun guide rail (300). The blocking mechanism (400) comprises: An elastic plate member (410), the elastic plate member (410) having a fixed end and a free end, the fixed end of the elastic plate member (410) being mounted on the fueling gun guide rail (300), and the free end of the elastic plate member (410) facing the drainage channel (310), and the two being arranged at a distance, an elastic blocking area (411) being formed on the plate surface at the free end of the elastic plate member (410), the elastic blocking area (411) being used to block the drainage channel (310), and the free end of the elastic plate member (410) being able to be attached to a side wall area of ​​the fueling gun guide rail (300) corresponding to the drainage channel (310), so that the elastic blocking area (411) correspondingly covers the drainage channel (310); A rubber component (420), the rubber component (420) is located on one side of the elastic plate component (410), and one end of the rubber component (420) is mounted on the auxiliary gate unit; The gate structure (200) comprises a gate bracket (210) fixedly connected to the auxiliary gate housing (100); the gate bracket (210) and the upper structures of the refueling gun guide rail (300) are stacked and clamp the elastic plate (410) and the rubber part (420).

2. The auxiliary gate unit for capless refueling according to claim 1, characterized in that: The gate structure (200) comprises: a gate member (220), the gate member (220) being movably connected to the gate support (210), and the gate member (220) can open or close the first inlet when moving relative to the gate support (210); A gate spring (230), wherein a portion of the gate spring (230) is mounted on the gate member (220), and another portion of the gate spring (230) is mounted on the gate bracket (210); The cross-sectional area of ​​the first inlet is smaller than the cross-sectional area of ​​the gate member (220), and when the gate spring (230) drives the gate member (220) to move to abut against an end wall of the auxiliary gate chamber (110) close to the first inlet, the first inlet is closed.

3. The auxiliary gate unit for capless refueling according to claim 1, characterized in that: The elastic blocking area (411) has a first angle and a second angle; When the elastic blocking area (411) is at the first angle, the elastic blocking area (411) and the drainage channel (310) are arranged at a distance, and a part of the structure of the elastic blocking area (411) is located on the path where the refueling gun is inserted; When the elastic sealing area (411) is subjected to external pressing force, the elastic sealing area (411) is elastically deformed, 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 external pressing force applied to the elastic sealing area (411) is cancelled, the elastic plate (410) returns to the first angle, and the elastic sealing area (411) is separated from the drainage channel (310).

4. The auxiliary gate unit for capless refueling according to claim 1, characterized in that: The auxiliary gate unit comprises a first sealing ring (510), the first sealing ring (510) being located between the outer wall of the fuel gun guide rail (300) and the inner wall of the auxiliary gate chamber (110), and the first sealing ring (510) being sleeved on the outer wall of the fuel gun guide rail (300), and the first sealing ring (510) being used to seal the gap between the outer wall of the fuel gun guide rail (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 block the communication between the first inlet and the drain outlet (120).

5. The auxiliary gate unit for capless refueling according to claim 2, characterized in that: One of the gate bracket (210) and the fueling gun guide rail (300) is provided with a plug-in protrusion (2191), and the other of the gate bracket (210) and the fueling gun guide rail (300) is provided with a plug-in groove (323), wherein along the first direction from the first inlet to the first outlet, the plug-in protrusion (2191) and the plug-in groove (323) are plug-fitted.

6. The auxiliary gate unit for capless refueling according to claim 2, characterized in that: The outer wall of the gate bracket (210) is provided with a first positioning portion (2192), and the inner wall of the auxiliary gate chamber (110) of the auxiliary gate housing (100) is provided with a first matching portion (140), and the first matching portion (140) is engaged with the first positioning portion (2192) to limit the circumferential rotation of the gate bracket (210) relative to the auxiliary gate chamber (110); The outer wall of the fueling gun guide rail (300) is provided with a second positioning portion (330), and the inner wall of the auxiliary gate chamber (110) of the auxiliary gate housing (100) is provided with a second matching portion (150), and the second matching portion (150) is engaged with the second positioning portion (330) to limit the circumferential rotation of the fueling gun guide rail (300) relative to the auxiliary gate chamber (110).

7. The auxiliary gate unit for capless refueling according to claim 1, characterized in that: The refueling gun guide rail (300) is provided with a guide channel (340) penetrating at two opposite ends, and the guide channel (340) is connected to the first outlet; Wherein, along a first direction from the first inlet to the first outlet, an opening of the guide channel (340) at one end close to the first inlet is larger than an opening of the guide channel (340) at the other end close to the first outlet.

8. A capless refueling device, characterized in that: include: The auxiliary gate unit for capless refueling according to any one of claims 1 to 7; A main cover unit, the main cover unit is fixedly matched with the auxiliary gate unit, the main cover unit has 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 refueling gun to be inserted for refueling, and limit the insertion stroke of the refueling gun; Wherein, the first outlet and the second inlet are butt-jointed and connected.

9. The capless refueling device according to claim 8, characterized in that: The capless refueling device comprises a second sealing ring (520), an annular protrusion is provided on the refueling gun guide rail (300), the annular protrusion is located at one end of the refueling gun guide rail (300) close to the first outlet, and the annular protrusion is arranged around the end opening of the refueling gun guide rail (300); the annular protrusion is inserted into and circumferentially positioned with a partial structure of the main cover unit close to the second inlet, wherein a part of the structure of the second sealing ring (520) is sleeve-fitted with the annular protrusion, and another part of the structure of the second sealing ring (520) is abutted against the main cover unit to seal the butt connection between the first outlet and the second inlet.

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