Main cover mechanism, main cover unit and uncovered refueling device

Abstract

The utility model relates to the technical field of automobile refueling devices, and provides a main cover mechanism, a main cover unit and an uncovered refueling device.The main cover mechanism comprises a main cover shell and a valve structure, the main cover shell is provided with a main cover channel, and the valve structure is arranged on the main cover shell and used for opening or closing the main cover channel. A main cover sealing layer is clamped in the valve structure, the projection of a part of the structure of the main cover sealing layer coincides with the projection of the valve structure, and when the main cover channel is closed by the valve structure, the projection of the other part of the structure of the main cover sealing layer is located on the part of the inner wall of the main cover channel, so that the valve structure and the main cover channel structure are sealed; the sealing performance of the main cover channel after the valve structure is closed is ensured, the reliability is improved, fuel steam is prevented from leaking out of the fuel tank, and the sealing performance is improved.

Description

Technical Field

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

[0002] At present, a refueling device is usually installed on the refueling pipe of the automobile fuel tank to close the refueling port. When refueling, the refueling gun is inserted into the refueling pipe along the refueling device to refuel the fuel tank. Therefore, the refueling device is an indispensable component in the automobile fuel system. The refueling device of the related art has a gap at the closing part, which causes liquid or gas leakage, resulting in poor sealing. Utility Model Content

[0003] The utility model provides a fueling gun guide rail for a secondary gate unit, which is used to solve the problem that a fueling device in the related art has gaps at the closing position, causing liquid or gas leakage and resulting in poor sealing.

[0004] The utility model provides a main cover mechanism, comprising:

[0005] A main cover housing, wherein the main cover housing is provided with a main cover channel;

[0006] A valve structure, provided on the main cover housing, the valve structure being used to open or close the main cover channel;

[0007] Among them, the valve structure is provided with a main cover sealing layer, and the projection of part of the structure of the main cover sealing layer coincides with the projection of the valve structure. When the valve structure closes the main cover channel, the projection of another part of the structure of the main cover sealing layer is located on part of the inner wall of the main cover channel to seal the valve structure and the main cover channel structure.

[0008] According to a main cover mechanism provided by the utility model, the valve structure is rotatably connected to the main cover housing, and a limiting boss is provided at the port of the main cover channel, and the limiting boss is hollow;

[0009] When the valve structure rotates away from the limiting boss, the main cover channel is opened;

[0010] When the valve structure rotates toward the limiting boss, the main cover sealing layer abuts against the limiting boss to close the main cover channel.

[0011] According to a main cover mechanism provided by the utility model, the valve structure comprises a lower cover and an upper cover, the upper cover is mounted on the lower cover, and the lower cover is rotatably connected to the main cover housing.

[0012] Wherein, the main cover sealing layer is sandwiched between the lower cover and the upper cover.

[0013] According to a main cover mechanism provided by the utility model, the upper cover is provided with a first plug-in boss and a first plug-in gap, the lower cover is provided with a second plug-in boss and a second plug-in gap, the first plug-in boss is inserted into the second plug-in gap, and the second plug-in boss is inserted into the second plug-in gap;

[0014] An assembly groove and a support end surface are provided on the end of the lower cover facing the upper cover, and the assembly groove and the support end surface surround the second plug-in boss in sequence from the inside to the outside; a limiting end surface is provided on the end of the upper cover facing the lower cover, and both the support end surface and the assembly groove have a spacing with the limiting end surface, and the assembly groove is provided corresponding to the limiting end surface;

[0015] Among them, the main cover sealing layer has an assembly section and a sealing section connected to the assembly section, the assembly section is sleeved on the second plug-in boss, and the assembly section is accommodated in the assembly groove, the sealing section is attached to the supporting end face, and the distance between the limiting end face and the upper edge of the side wall of the assembly groove is less than the thickness of the assembly section.

[0016] According to a main cover mechanism provided by the utility model, the main cover sealing layer is a sealing rubber pad.

[0017] According to a main cover mechanism provided by the utility model, the outer side wall of the first plug-in boss is provided with two assembly protrusions, the two assembly protrusions are spaced apart and symmetrically arranged, and the assembly protrusions are located in the first plug-in gap;

[0018] The second plug-in boss is provided with two assembly arms, the two assembly arms are spaced apart and symmetrically arranged, and the assembly arms are provided with assembly holes;

[0019] The assembly arm is inserted into the second insertion gap, and the assembly hole is engaged with the assembly protrusion to limit the back-to-back movement of the lower cover and the upper cover in the first direction.

[0020] According to a main cover mechanism provided by the utility model, a transmission assembly is provided between the lower cover and the main cover shell, and the transmission assembly is used to drive the lower cover to rotate toward the position of closing the main cover channel.

[0021] According to a main cover mechanism provided by the utility model, the transmission assembly includes a main cover shaft and a main cover spring, the main cover shaft is arranged on the main cover shell, the lower cover is rotatably installed on the main cover shaft, the main cover spring is sleeved on the main cover shaft, one end of the main cover spring abuts against the inner side wall of the main cover shaft, and the other end of the main cover spring abuts against the lower end surface of the lower cover to drive the lower cover to rotate toward the position of closing the main cover channel.

[0022] The utility model also provides a main cover unit, comprising the main cover mechanism described above.

[0023] The utility model also provides a capless refueling device, comprising:

[0024] Auxiliary gate unit;

[0025] The main cover unit is fixedly matched with the auxiliary gate unit, and the auxiliary gate unit is provided with an auxiliary gate chamber, and the auxiliary gate chamber is connected to and communicated with the main cover channel.

[0026] The main cover mechanism provided by the utility model adopts the above-mentioned structure. When the valve structure closes the main cover channel, the main cover sealing layer acts as a sealing device, ensuring the sealing of the main cover channel after the valve structure is closed, improving reliability, and inhibiting the leakage of fuel vapor to the outside of the fuel tank; in addition, the main cover sealing layer can not only prevent leakage, but also reduce the friction and wear between the valve structure and the main cover channel, thereby improving durability, extending the service life, and reducing the frequency of maintenance and replacement; at the same time, the overlapping projection of the main cover sealing layer and the valve structure may increase the contact area between the sealing component and the valve structure, thereby improving the structural stability and reducing the looseness or movement between the components, and when the main cover channel is closed by the valve structure, another part of the structural projection of the main cover sealing layer is located on a part of the inner wall of the main cover channel, which helps to improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a structural schematic diagram of the refueling device provided by the utility model;

[0029] Figure 2 It is a cross-sectional schematic diagram of the refueling device provided by the utility model;

[0030] Figure 3 It is a structural schematic diagram of the main cover unit provided by the utility model;

[0031] Figure 4 It is an exploded schematic diagram of the main cover unit provided by the utility model;

[0032] Figure 5 It is a cross-sectional schematic diagram of the valve structure and the main cover sealing layer provided by the utility model;

[0033] Figure 6 It is an exploded schematic diagram of the valve structure and the main cover sealing layer provided by the utility model.

[0034] Reference numerals:

[0035] 100, auxiliary gate housing; 110, auxiliary gate chamber; 120, drainage port;

[0036] 200, gate structure; 300, fuel gun guide rail; 310, drainage channel;

[0037] 400, blocking mechanism; 530, main shaft; 540, main cover spring; 550, main cover sealing layer; 551, assembly section; 552, sealing section; 600, main cover shell; 610, main cover channel; 620, limiting boss; 630, first port; 640, second port; 650, stop structure; 700, deflector; 710, deflector channel; 800, valve structure; 810, lower cover; 811, lower chamber; 813, second plug-in boss; 814, assembly arm; 8141, assembly hole; 815, assembly groove; 816, supporting end face; 820, upper cover; 821, upper chamber; 822, first plug-in boss; 823, assembly protrusion; 824, pushing concave surface; 825, limiting end face; 830, valve body assembly. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Combine the following Figure 1-Figure 6 The main cover mechanism, the main cover unit and the capless refueling device of the utility model are described. The capless refueling device comprises a secondary gate unit and a main cover unit. The main cover unit comprises the main cover mechanism.

[0040] Reference Figures 1 to 6According to the utility model, a main cover mechanism is provided, including: a main cover shell body 600, the main cover shell body 600 is provided with a main cover channel 610; a valve structure 800, which is arranged in the main cover shell body 600, and the valve structure 800 is used to open or close the main cover channel 610; wherein, the valve structure 800 is sandwiched with a main cover sealing layer 550, and the projection of part of the structure of the main cover sealing layer 550 coincides with the projection of the valve structure 800, and when the valve structure 800 closes the main cover channel 610, the projection of another part of the structure of the main cover sealing layer 550 is located on part of the inner wall of the main cover channel 610, so as to seal the valve structure 800 and the main cover channel 610 structure.

[0041] The main cover mechanism provided by the utility model adopts the above-mentioned 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 after the valve structure 800 is closed, 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 the friction and wear between the valve structure 800 and the main cover channel 610, thereby improving durability, extending the service life, and reducing the frequency of maintenance and replacement; at the same time, the overlapping projection of the main cover sealing layer 550 and the valve structure 800 may increase the contact area between the sealing component and the valve structure 800, thereby improving the structural stability and reducing the looseness or movement between the components, and when the main cover channel 610 is closed by the valve structure 800, another part of the structural projection of the main cover sealing layer 550 is located on a part of the inner wall of the main cover channel 610, which helps to improve the sealing performance.

[0042] Specifically, refer to Figures 1 to 6 In an embodiment of the utility model, the valve structure 800 is rotatably connected to the main cover shell body 600, and 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; 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.

[0043] With the upper structure, when the valve structure 800 closes the main cover channel 610, the lower cover 810 covers the hollow part of the limiting boss 620 and cooperates with the inner surface of the limiting boss 620; a pressure relief channel in the valve structure 800 is provided, allowing the pressure inside the main cover channel 610 to be connected to the outside of the main cover channel 610 through the pressure relief channel. When the pressure in the main cover channel 610 exceeds the preset threshold, the valve body assembly 830 automatically enters the pressure relief state. The valve body assembly 830 will be converted from the closed state to the pressure relief state, which means that the pressure inlet end and the pressure relief end of the pressure relief channel will be connected, thereby releasing the excessive pressure in the main cover channel 610. The automatic response mechanism is conducive to ensuring that the fuel tank and the main cover unit will not be damaged or dangerous when the pressure is too high, providing safety protection; the lower cover 810 is rotatably connected to the main cover shell 600, which is conducive to the adjustment and flexible operation of the valve structure 800.

[0044] Specifically, refer to Figures 1 to 6 In an embodiment of the utility model, the valve structure 800 includes a lower cover 810 and an upper cover 820, the upper cover 820 is installed on the lower cover 810, and the lower cover 810 is rotatably connected to the main cover shell 600, wherein the main cover sealing layer 550 is sandwiched between the lower cover 810 and the upper cover 820, which can improve the sealing performance, assembly convenience and structural stability.

[0045] It should be noted that in the embodiment of the utility model, 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.

[0046] Specifically, refer to Figure 2 , Figures 4 to 6In the embodiment of the utility model, the upper cover 820 is provided with a first plug-in boss 822 and a first plug-in gap, the lower cover 810 is provided with a second plug-in boss 813 and a second plug-in gap, the first plug-in boss 822 is inserted in the second plug-in gap, and the second plug-in boss 813 is inserted in the second plug-in gap; the end of the lower cover 810 facing the upper cover 820 is provided with an assembly groove 815 and a support end face 816, the assembly groove 815 and the support end face 816 surround the second plug-in boss 813 from the inside to the outside in sequence, and the end of the upper cover 820 facing the lower cover 810 is provided with a limit The end face 825, the supporting end face 816 and the assembly groove 815 are all spaced apart from the limiting end face 825, and the assembly groove 815 is arranged corresponding to the limiting end face 825; wherein, the main cover sealing layer 550 has an assembly section 551 and a sealing section 552 connected to the assembly section 551, the assembly section 551 is sleeved on the second plug-in boss 813, and the assembly section 551 is accommodated in the assembly groove 815, the sealing section 552 is attached to the supporting end face 816, and the distance 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.

[0047] With the above structure, 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 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 in contact with the support end face 816. The above structural design provides a higher sealing performance, ensures a good fit and effective sealing after assembly, and avoids The leakage of fluid or gas is prevented; the fitting 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, thereby enhancing the reliability of the valve structure 800 and reducing the problems that may be caused by inaccurate assembly; since the assembly section 551 is accommodated in the assembly groove 815, the main cover sealing layer 550 is not easily affected by external forces during operation, thereby enhancing its durability and service life; the entire structure is more compact, space-saving, suitable for various application scenarios, and the installation process is simple and convenient. During maintenance, due to the clear structure, it is easier to disassemble and replace the main cover sealing layer 550, which also protects the interior of the main cover unit from the influence of the external environment and improves stability and durability.

[0048] Specifically, refer to Figure 2 , Figures 4 to 6In the embodiment of the utility model, the outer side wall of the first plug-in boss 822 is provided with two assembly protrusions 823, the two assembly protrusions 823 are spaced apart and symmetrically arranged, and the assembly protrusions 823 are located in the first plug-in gap; the second plug-in boss 813 is provided with two assembly arms 814, the two assembly arms 814 are spaced apart and symmetrically arranged, and the assembly arms 814 are provided with assembly holes 8141; wherein, the assembly arms 814 are inserted into the second plug-in gap, and the assembly holes 8141 are snap-fitted with the assembly protrusions 823 to limit the back-to-back movement of the lower cover 810 and the upper cover 820 in the first direction, and can limit the back-to-back movement between the upper cover 820 and the lower cover 810 in the first direction. That is to say, the upper cover 820 and the lower cover 810 will not 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, and the assembly can be completed by simply aligning the first plug-in boss 822 and the second plug-in boss 813, and snapping the assembly hole 8141 with the assembly protrusion 823, which can improve the assembly efficiency.

[0049] It is understandable that, referring to Figure 2 , Figures 4 to 6 In the embodiment of the utility model, a transmission assembly is provided between the lower cover 810 and the main cover housing 600, and the transmission assembly is used to drive the lower cover 810 to rotate toward the position of closing the main cover passage 610. Specifically, the transmission assembly includes a main cover spindle 530 and a main cover spring 540, the main cover spindle 530 is provided on the main cover housing 600, the lower cover 810 is rotatably mounted on the main cover spindle 530, the main cover spring 540 is sleeved on the main cover spindle 530, one end of the main cover spring 540 abuts against the inner side wall of the main cover spindle 530, and the other end of the main cover spring 540 abuts against the lower end surface of the lower cover 810, so as to drive the lower cover 810 to rotate toward the position of closing the main cover passage 610.

[0050] With the above structure, the main cover spring 540 is sleeved on the main cover 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.

[0051] Specifically, refer to Figures 3 to 6In an embodiment of the utility model, 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.

[0052] 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.

[0053] Specifically, in an embodiment of the utility model, the valve structure 800 also includes a valve body assembly 830, and a pressure relief channel is formed between the upper cover 820 and the lower cover 810. The valve body assembly 830 is located between the upper chamber 821 of the upper cover 820 and the lower chamber 811 of the lower cover 810 to open or close the pressure relief channel and adjust the pressure of the main cover shell 600.

[0054] It should be noted that, refer to Figure 1 and Figure 2 In the embodiment of the utility model, the main cover unit is fixedly matched with the auxiliary gate unit, and the auxiliary gate unit is provided with an auxiliary gate chamber 110 , which is connected to and communicated with the main cover channel 610 .

[0055] Specifically, refer to Figure 1 and Figure 2In the embodiment of the utility model, the auxiliary gate unit includes an auxiliary gate housing 100, a gate structure 200 and a refueling gun guide rail 300. The auxiliary gate housing 100 is provided with an auxiliary gate chamber 110. The two opposite ends of the auxiliary gate chamber 110 are respectively a first inlet and a first outlet. The auxiliary gate chamber 110 is used for inserting a refueling gun; the gate structure 200 is used to open or close the first inlet. The gate structure 200 is used to open or close the first inlet. The gate structure 200 is fixedly arranged inside the auxiliary gate chamber 110. Part of the gate structure 200 is fixedly matched with the auxiliary gate housing 100; the refueling gun guide rail 300 is used to guide the refueling gun to move. The refueling gun guide rail 300 is fixedly arranged on the auxiliary gate. Inside the door chamber 110, the fueling gun guide rail 300 is located on one side of the gate structure 200, and part of the structure of the fueling gun guide rail 300 is fixedly matched with the auxiliary gate housing 100; in a first direction, one end of the gate structure 200 abuts against an inner wall at 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.

[0056] Through the above structure, there is no need to unscrew the auxiliary gate unit when refueling, and the refueling gun can be directly inserted, and the gate structure 200 is pushed by the refueling gun to open the first inlet, so that the refueling gun can be inserted into the auxiliary gate chamber 110, the gate structure 200 and the refueling gun guide rail 300 to realize the refueling operation. Through the above structure, the operation of opening and closing the fuel filler cap is omitted when refueling, and the first inlet can only be opened when the gate structure 200 is subjected to the push force of the fuel gun, and the door opening direction is toward the position of the first outlet; the first inlet can only be closed after the gate structure 200 is out of contact with the fuel gun, and the door closing direction is toward the position of the first inlet. The above gate structure 200 is a single-door structure to prevent water and dust from entering, and can ensure that the door is tightly closed in the non-refueling state, thereby achieving waterproof and dustproof, saving time and effort, and avoiding the situation of leaking; at the same time, when the fuel gun is inserted, the auxiliary gate chamber 110, the gate structure 200 and the fuel gun guide rail 300 are sequentially abutted and matched, thereby improving the stability of the gate structure 200, thereby improving the stability and reliability of the entire auxiliary gate unit.

[0057] It can be understood that in the embodiment of the present utility model, the main cover unit also includes a deflector 700 connected to the main cover shell 600, and the deflector 700 is provided with a deflector channel 710, which is connected to the main cover channel 610 to form a main cover chamber.

[0058] It should be noted that the two opposite ends of the main cover chamber are respectively the second inlet and the second outlet, and the first outlet is butt-connected with the second inlet.

[0059] It is understandable that, referring to Figure 1 and Figure 2 In an embodiment of the utility model, the auxiliary gate housing 100 is provided with a drain port 120, and the refueling 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 refueling gun guide rail 300, and the blocking mechanism 400 has a blocking state and an open state; wherein the blocking mechanism 400 in the open state can open the drain channel 310; the blocking mechanism 400 can switch from the open state to the blocking state under the action of an external force to block the drain channel 310. Through the specially designed drain port 120 and drain channel 310, a small amount of water flowing in from the gap between the auxiliary gate housing 100 and the gate structure 200 can be discharged from the drain port 120, avoiding the decrease in the sealing performance of the auxiliary gate unit and the partial damage of the main cover unit caused by the insertion of the refueling gun after freezing; and because there are certain sealing requirements for the auxiliary gate unit and the entire refueling device during refueling, a sealing mechanism 400 is provided to seal the drain channel 310 and the drain port 120, so as to achieve sealed refueling while also being able to cope with steam reflux type refueling guns.

[0060] It can be understood that in the embodiment of the utility model, the overall assembly process of the above-mentioned refueling device is as follows: during installation, the main cover unit and the auxiliary gate unit are both installed at the refueling port of the car, the auxiliary gate unit cover is arranged on part of the structure of the main cover unit, the main cover unit is inserted into the refueling pipe of the fuel tank, and the auxiliary gate unit cover is installed on the body of the car.

[0061] 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.

[0062] It can be understood that in the embodiment of the utility model, the use process of the above-mentioned refueling device is as follows: the refueling gun pushes the gate structure 200 to open the first inlet, and the refueling gun passes through the gate structure 200 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 then refueling is carried out.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A main cover mechanism, characterized in that: include: A main cover housing (600), wherein the main cover housing (600) is provided with a main cover channel (610); A valve structure (800) is provided on the main cover housing (600), and the valve structure (800) is used to open or close the main cover channel (610); The valve structure (800) is sandwiched with a main cover sealing layer (550), and a projection of a part of the structure of the main cover sealing layer (550) coincides with a projection of the valve structure (800). When the valve structure (800) closes the main cover channel (610), another part of the structure of the main cover sealing layer (550) is projected on a part of the inner wall of the main cover channel (610) to seal the valve structure (800) and the main cover channel (610).

2. The main cover mechanism according to claim 1, characterized in that: The valve structure (800) is rotatably connected to the main cover housing (600), and 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; 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).

3. The main cover mechanism according to claim 2, characterized in that: The valve structure (800) comprises a lower cover (810) and an upper cover (820), wherein the upper cover (820) is mounted on the lower cover (810), and the lower cover (810) is rotatably connected to the main cover housing (600). Wherein, the main cover sealing layer (550) is sandwiched between the lower cover (810) and the upper cover (820).

4. The main cover mechanism according to claim 3, characterized in that: The upper cover (820) is provided with a first plug-in boss (822) and a first plug-in gap, and the lower cover (810) is provided with a second plug-in boss (813) and a second plug-in gap, the first plug-in boss (822) is inserted into the second plug-in gap, and the second plug-in boss (813) is inserted into the second plug-in gap; An assembly groove (815) and a support end surface (816) are provided on the end of the lower cover (810) facing the upper cover (820); the assembly groove (815) and the support end surface (816) surround the second plug-in boss (813) in sequence from the inside to the outside; a limiting end surface (825) is provided on the end of the upper cover (820) facing the lower cover (810); both the support end surface (816) and the assembly groove (815) are spaced apart from the limiting end surface (825); and the assembly groove (815) and the limiting end surface (825) are arranged correspondingly; Wherein, the main cover sealing layer (550) has an assembly section (551) and a sealing section (552) connected to the assembly section (551), the assembly section (551) is sleeved on the second plug-in boss (813), and the assembly section (551) is accommodated in the assembly groove (815), the sealing section (552) is attached to the supporting end face (816), and the distance 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).

5. The main cover mechanism according to claim 4, characterized in that: The main cover sealing layer (550) is a sealing rubber pad.

6. The main cover mechanism according to claim 4, characterized in that: The outer side wall of the first plug-in boss (822) is provided with two assembly protrusions (823), the two assembly protrusions (823) are spaced apart and symmetrically arranged, and the assembly protrusions (823) are located in the first plug-in gap; The second plug-in boss (813) is provided with two assembly arms (814), the two assembly arms (814) are spaced apart and symmetrically arranged, and the assembly arms (814) are provided with assembly holes (8141); The assembly arm (814) is inserted into the second insertion gap, and the assembly hole (8141) is engaged with the assembly protrusion (823) to limit the back-to-back movement of the lower cover (810) and the upper cover (820) in the first direction.

7. The main cover mechanism according to claim 3, characterized in that: A transmission assembly is provided between the lower cover (810) and the main cover shell (600), and the transmission assembly is used to drive the lower cover (810) to rotate toward the position of closing the main cover channel (610).

8. The main cover mechanism according to claim 7, characterized in that: The transmission assembly includes a main cover shaft (530) and a main cover spring (540), wherein the main cover shaft (530) is disposed on the main cover shell (600), and the lower cover (810) is rotatably mounted on the main cover shaft (530), and the main cover spring (540) is sleeved on the main cover shaft (530), and one end of the main cover spring (540) abuts against the inner side wall of the main cover shaft (530), and the other end of the main cover spring (540) abuts against the lower end surface of the lower cover (810) to drive the lower cover (810) to rotate toward the position of closing the main cover channel (610).

9. A main cover unit, characterized in that: It comprises the main cover mechanism as described in any one of claims 1 to 8.

10. A capless refueling device, characterized in that: include: Auxiliary gate unit; The main cover unit as described in claim 9, wherein the main cover unit is fixedly matched with the auxiliary gate unit, and the auxiliary gate unit is provided with an auxiliary gate chamber (110), and the auxiliary gate chamber (110) is docked and connected with the main cover channel (610).

Images