Main cover assembly for gas circulation, main cover unit and uncovered refueling device

Abstract

The utility model relates to the technical field of automobile refueling devices, and provides a gas circulation main cover assembly, a main cover unit and an uncovered refueling device.The gas circulation main cover assembly comprises a shell mechanism and a gas circulation structure, the shell mechanism is provided with a main cover cavity, the two opposite ends of the main cover cavity are each provided with a through opening, and the gas circulation structure penetrates through the interior and the exterior of the shell mechanism; the interior of the main cover cavity and the through opening in the end of the main cover cavity are both communicated with the gas circulation structure, so that gas circulates inside and outside between the main cover cavity and the gas circulation structure. By the adoption of the structure, due to the fact that the gas circulation structure penetrates through the interior and the exterior of the shell mechanism, it can be guaranteed that gas smoothly flows between the main cover cavity and the gas circulation structure, stable gas circulation is formed, and when the gas can freely circulate between the main cover cavity and the exterior, the gas circulation structure is not prone to falling off. Pressure balance between the interior and the exterior of the main cover cavity can be kept, structural damage caused by pressure difference is avoided, and normal work of the oil gun is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile refueling devices, in particular to a main cover component, a main cover unit and a capless refueling device for gas circulation. 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 of the automobile fuel system. There is a large air pressure difference between the inside and outside of the shell of the refueling device of the related art, which affects the normal operation of the refueling gun. Utility Model Content

[0003] The utility model provides a main cover component for gas circulation, which is used to solve the problem that a large gas pressure difference exists inside and outside a shell of a refueling device in the related technology, thus affecting the normal operation of a refueling gun.

[0004] The utility model provides a main cover assembly for gas circulation, comprising:

[0005] A shell mechanism, wherein the shell mechanism is provided with a main cover chamber, and two opposite ends of the main cover chamber are provided with openings;

[0006] A gas circulation structure, the gas circulation structure penetrating the interior and exterior of the housing mechanism;

[0007] The interior of the main cover chamber and the end opening 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.

[0008] According to a gas circulation main cover assembly provided by the utility model, the gas circulation structure includes a first gas circulation port, the first gas circulation port is opened on the side wall of the shell mechanism, and the first gas circulation port corresponds to the main cover chamber.

[0009] According to a main cover assembly for gas circulation provided by the utility model, the gas circulation structure includes a second gas circulation port, the second gas circulation port is opened on the side wall of the shell mechanism, and the second gas circulation port corresponds to the main cover chamber; wherein the second gas circulation port and the second gas circulation port are arranged at intervals.

[0010] According to a main cover assembly for gas circulation provided by the utility model, the housing mechanism comprises a main cover housing and a flow guide connected to the main cover housing, the main cover housing is provided with a main cover channel, the flow guide is provided with a flow guide channel, the main cover channel is communicated with the flow guide channel to form the main cover chamber;

[0011] Among them, the deflector is provided with a guide gas concave edge, and the guide gas concave edge runs through the inside and outside of the guide channel. The main cover shell has a main cover gas concave edge, and the guide gas concave edge and the guide gas cooperate to form a first gas circulation port, and the second gas circulation port is arranged on the main cover shell, and the first gas circulation port and the second gas circulation port are arranged opposite to each other.

[0012] According to a main cover assembly for gas circulation provided by the utility model, the shell mechanism is provided with a valve structure, and the valve structure is used to open or close the main cover chamber.

[0013] According to a main cover assembly for gas circulation provided by the utility model, in a first direction, the position at which the valve structure closes the main cover chamber is higher than the position at which the gas circulation structure is located on the shell mechanism.

[0014] According to a main cover assembly for gas circulation provided by the utility model, a main cover sealing ring is sleeved on the outer wall of the shell mechanism, and in a first direction, the main cover sealing ring is located on the shell mechanism at a position higher than the position where the valve structure closes the main cover chamber.

[0015] According to a main cover assembly for gas circulation provided by the utility model, the inner side wall of the housing mechanism is provided with a first annular step, a second annular step and a third annular step, and in a first direction, the first annular step, the second annular step and the third annular step are in a step structure that descends sequentially from the outside to the inside;

[0016] The center line of the first annular step coincides with the center line of the main cover chamber, and the second annular step and the third annular step both deviate from the center line of the main cover chamber.

[0017] The utility model also provides a main cover unit, comprising the main cover assembly of the gas circulation.

[0018] The utility model also provides a capless refueling device, comprising:

[0019] the above mentioned main cover unit;

[0020] A secondary gate unit, the main cover unit is fixedly matched with the secondary gate unit, the secondary gate unit is provided with a secondary gate chamber, and the secondary gate chamber is docked with and communicated with the main cover chamber.

[0021] The gas circulation main cover assembly provided by the utility model adopts the above-mentioned structure. Since the gas circulation structure passes through the inside and outside of the shell mechanism, the above-mentioned design can ensure that the gas flows smoothly between the main cover chamber and the gas circulation structure to form 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 main cover chamber, avoids structural damage caused by pressure differences, and is conducive to the normal operation of the refueling gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of the main cover unit provided by the utility model;

[0024] Figure 2 It is a structural schematic diagram of the main cover shell provided by the utility model;

[0025] Figure 3 It is a structural schematic diagram of the deflector provided by the utility model;

[0026] Figure 4 It is a structural schematic diagram of the coverless refueling device provided by the utility model;

[0027] Figure 5 It is a cross-sectional schematic diagram of a capless refueling device provided by the utility model.

[0028] Reference numerals:

[0029] 100. Shell mechanism; 110. Main cover chamber; 120. Main cover shell; 121. Main cover channel; 122. Main cover gas concave edge; 130. Guide body; 131. Guide channel; 132. Guide gas concave edge; 140. Valve structure; 150. First annular step; 160. Second annular step; 170. Third annular step; 210. First gas circulation port; 220. Second gas circulation port; 300. Auxiliary gate shell; 310. Auxiliary gate chamber; 320. Drainage port; 400. Gate structure; 500. Fuel gun guide rail; 510. Drainage channel; 600. Blocking mechanism. DETAILED DESCRIPTION

[0030] 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.

[0031] Combine the following Figure 1-Figure 5 The utility model describes a main cover assembly, a main cover unit and a capless refueling device for gas circulation. The capless refueling device comprises a secondary gate unit and a main cover unit.

[0032] Reference Figures 1 to 5 According to the utility model, a main cover assembly for gas circulation is provided, comprising: a shell mechanism 100, a main cover chamber 110 is provided on the shell mechanism 100, and openings are provided at both opposite ends of the main cover chamber 110; a gas circulation structure, the gas circulation structure runs through the inside and outside of the shell mechanism 100; wherein the openings inside the main cover chamber 110 and the ends of the main cover chamber 110 are both connected to the gas circulation structure, so that the gas circulates inside and outside between the main cover chamber 110 and the gas circulation structure.

[0033] The gas circulation main cover assembly provided by the utility model adopts the above-mentioned structure. Since the gas circulation structure passes through the inside and outside of the shell mechanism 100, the above-mentioned design can ensure that the gas flows smoothly between the main cover chamber 110 and the gas circulation structure to form a stable gas circulation. When the gas can circulate freely between the main cover chamber 110 and the outside, it helps to maintain the pressure balance between the inside and outside of the main cover chamber 110, avoid structural damage caused by pressure differences, and is conducive to the normal operation of the refueling gun.

[0034] Specifically, refer to Figures 1 to 5 In the embodiment of the utility model, the gas circulation structure includes a first gas circulation port 210, which is opened on the side wall of the housing mechanism 100, and corresponds to the main cover chamber 110. With the above structure, the first gas circulation port 210 may be used as a vent or exhaust port to ensure that the gas in the main cover chamber 110 can be effectively circulated or discharged, so that the gas flows smoothly, the structure is simple, and it is easy to manufacture, and the gas pressure or temperature change in the main cover chamber 110 is adjusted to a certain extent.

[0035] Specifically, refer to Figures 1 to 5In the embodiment of the utility model, the gas circulation structure includes a second gas circulation port 220, and the second gas circulation port 220 is opened on the side wall of the shell mechanism 100, and the second gas circulation port 220 corresponds to the main cover chamber 110; wherein, the second gas circulation port 220 and the second gas circulation port 220 are arranged at intervals. With the above structure, the second gas circulation port 220 is also provided to cooperate with the first gas circulation port 210, and the pressure can be further fully adjusted, and the gas flow can be distributed more evenly, reducing the possible local gas pressure or temperature changes, so as to optimize the gas circulation structure and improve flexibility, stability and safety.

[0036] It is understandable that, referring to Figures 1 to 5 In the embodiment of the utility model, the housing mechanism 100 includes a main cover housing 120 and a flow guide connected to the main cover housing 120, the main cover housing 120 is provided with a main cover channel 121, the flow guide is provided with a flow guide channel 131, the main cover channel 121 is connected with the flow guide channel 131 to form a main cover chamber 110; wherein, the flow guide is provided with a flow guide gas concave edge 132, the flow guide gas concave edge 132 penetrates the inside and outside of the flow guide channel 131, the main cover housing 120 has a main cover gas concave edge 122, the flow guide gas concave edge 132 and the flow guide gas cooperate to form a first gas circulation port 210, the second gas circulation port 220 is provided on the main cover housing 120, and the first gas circulation port 210 and the second gas circulation port 220 are arranged oppositely. With the above structure, through reasonable design, the manufacturing process can be simplified, and the production cost and manufacturing time can be reduced.

[0037] It is also understandable that, with reference to Figures 1 to 5 In the embodiment of the present invention, the main cover shell 120 and the deflector are split structures. When the force in the direction of separation of the main cover shell 120 and the deflector 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 120 and the deflector is greater than the preset force, the two are separated. With the above structure, the main cover shell 120 and the deflector are set to be split. Therefore, when the fuel gun is inserted with incorrect force, the main cover shell 120 and the deflector 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 120 and the deflector 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 120 and the deflector with corresponding sizes, thereby improving adaptability and flexibility.

[0038] It should be noted that, in the embodiment of the present invention, in the second direction, the first gas circulation port 210 and the second gas circulation port 220 are respectively located on the opposite side walls of the main cover chamber 110, which can better balance the flow of gas in the main cover chamber 110, help reduce the local pressure or temperature difference of the gas, thereby improving 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 120, thereby more flexibly designing and laying out other components of the system.

[0039] It should also be noted that, referring to Figure 5 In the embodiment of the present invention, the housing mechanism 100 is provided with a valve structure 140, and the valve structure 140 is used to open or close the main cover chamber 110. When the main cover chamber 110 needs to be closed, the valve structure 140 can effectively prevent the gas from leaking from the main cover chamber 110 to the external environment, which helps to keep the gas pressure and composition inside the main cover chamber 110 stable.

[0040] Specifically, refer to Figure 5 In the embodiment of the utility model, in the first direction, the position where the valve structure 140 closes the main cover chamber 110 is higher than the position where the gas circulation structure is located on the housing mechanism 100. With the above structure, during assembly, the main cover unit is inserted into the fuel filler pipe, the gas circulation structure cooperates with the side wall of the fuel filler pipe, and the valve structure 140 closes the main cover channel 121, that is, closes the main cover chamber 110, so that a sealed space is formed between the main cover chamber 110 and the fuel filler pipe. Therefore, the gas flows along the first gas circulation port 210 and the second gas circulation port 220 to the outside of the main cover shell 120, and flows back to the main cover chamber 110 through the opening of the guide channel 131 of the guide device, thereby circulating; or the gas flows to the outside of the main cover chamber 110 through the opening of the guide channel 131 of the guide device, and flows into the main cover chamber 110 through the first gas circulation port 210 and the second gas circulation port 220, thereby circulating, which can reduce the interference of the valve structure 140 on the gas circulation structure. When the valve structure 140 needs to be operated or maintained, it will not affect the gas circulation structure, thereby ensuring normal operation.

[0041] Specifically, in the embodiment of the utility model, the outer wall of the housing mechanism 100 is sleeved with a main cover sealing ring. In the first direction, the main cover sealing ring is located on the housing mechanism 100 at a position higher than the position where the valve structure 140 closes the main cover chamber 110. With the above arrangement, when the main cover channel 121, i.e., the main cover chamber 110 is closed, the main cover sealing ring is at a higher position, which helps to improve the sealing performance between the refueling pipe and the main cover housing 120, can effectively prevent gas or liquid from leaking from the main cover chamber 110 to the external environment, maintain airtightness, and reduce the risk of damage or accidental destruction of the main cover sealing ring.

[0042] Specifically, refer to Figure 1 In the embodiment of the utility model, the inner side wall of the housing mechanism 100 is provided with a first annular step 150, a second annular step 160 and a third annular step 170. In the first direction, the first annular step 150, the second annular step 160 and the third annular step 170 are in a step structure that descends from the outside to the inside in sequence; wherein the center line of the first annular step 150 coincides with the center line of the main cover chamber 110, and the second annular step 160 and the third annular step 170 are both offset from the center line of the main cover chamber 110. 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 valve structure 140 and prevent the installation position of the valve structure 140 and the main cover housing 120 from being blocked and damaged, thus playing a protective role.

[0043] It should also be noted that, referring to the figures and the figures, in the embodiment of the utility model, the auxiliary gate unit is provided with an auxiliary gate chamber 310, and the auxiliary gate chamber 310 is connected and communicated with the main cover chamber 110, that is, the main cover passage 121. Specifically, the opposite ends of the auxiliary gate chamber 310 are respectively the first inlet and the first outlet, and the opposite ends of the main cover chamber 110 are respectively the second inlet and the second outlet, the second inlet is one end opening of the main cover passage 121, and the second outlet is the other end opening of the deflector facing away from the main cover housing 120.

[0044] Specifically, refer to Figure 4 and Figure 5 In the embodiment of the utility model, the auxiliary gate unit includes an auxiliary gate housing 300, a gate structure 400 and a refueling gun guide rail 500. The auxiliary gate housing 300 is provided with an auxiliary gate chamber 310. The gate structure 400 is used to open or close the first entrance. The gate structure 400 is used to open or close the first entrance. The gate structure 400 is fixedly arranged inside the auxiliary gate chamber 310. Part of the gate structure 400 is fixedly matched with the auxiliary gate housing 300. The refueling gun guide rail 500 is used to guide the refueling gun to move. The refueling gun guide rail 500 is fixedly arranged inside the auxiliary gate chamber 310. The refueling gun guide rail 500 is located at the gate. On one side of the door structure 400, part of the structure of the fuel gun guide rail 500 is fixedly matched with the auxiliary gate housing 300; in a first direction, one end of the gate structure 400 abuts against an inner wall of one end of the auxiliary gate chamber 310, and the other end of the gate structure 400 abuts against an end of the fuel gun guide rail 500; wherein, when the gate structure 400 is subjected to the pushing force of the fuel gun, the first inlet is opened, and the opening direction of the gate structure 400 is toward the location of the first outlet; after the gate structure 400 is out of contact with the fuel gun, the first inlet is closed, and the closing direction of the gate structure 400 is toward the location of the first inlet.

[0045] 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 400 is pushed by the refueling gun to open the first inlet, so that the refueling gun can be inserted into the auxiliary gate chamber 310, the gate structure 400 and the refueling gun guide rail 500 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 400 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 400 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 400 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 310, the gate structure 400 and the fuel gun guide rail 500 are abutted and matched in sequence, thereby improving the stability of the gate structure 400, thereby improving the stability and reliability of the entire auxiliary gate unit.

[0046] It is understandable that, referring to Figure 4 and Figure 5 In an embodiment of the utility model, the auxiliary gate housing 300 is provided with a drain port 320, and the refueling gun guide rail 500 is provided with a drain channel 510 connected to the drain port 320; the auxiliary gate unit also includes a blocking mechanism 600, which is arranged on the refueling gun guide rail 500, and the blocking mechanism 600 has a blocking state and an open state; wherein the blocking mechanism 600 in the open state can open the drain channel 510; the blocking mechanism 600 can switch from the open state to the blocking state under the action of external force to block the drain channel 510. Through the specially designed drain port 320 and drain channel 510, a small amount of water flowing in from the gap between the auxiliary gate housing 300 and the gate structure 400 can be discharged from the drain port 320, 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 600 is provided to seal the drain channel 510 and the drain port 320, so as to achieve sealed refueling while also being able to cope with steam reflux type refueling guns.

[0047] Specifically, referring to Figures and Figures, in an embodiment of the utility model, a sealing structure is provided between the main cover unit and the auxiliary gate unit, and the sealing structure is used to seal the connection between the auxiliary gate chamber 310 and the main cover channel 121. Specifically, the sealing structure is a foam sealing ring, a part of which is sleeved on the refueling gun guide rail 500, and the other part is sleeved on the main cover shell 120, so as to improve the sealing performance when the two are connected.

[0048] 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.

[0049] It should be noted that a guide groove is provided in the auxiliary gate chamber 310 of the auxiliary gate shell 300 of the above-mentioned auxiliary gate unit, and a guide protrusion is provided in the main cover shell 120 of the main cover unit, which cooperates with the guide groove to assemble the auxiliary gate shell 300 and the main cover shell 120.

[0050] 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 400 to open the first inlet, the refueling gun passes through the gate structure 400 and the refueling gun guide rail 500 in sequence, then, the refueling gun pushes the valve structure 140 to open the second inlet, the refueling gun is inserted into the main cover channel 121 of the main cover shell 120 and the guide channel 131 of the guide, and then the fuel tank is refueled.

[0051] 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 assembly for gas circulation, characterized in that: include: A housing structure (100), wherein a main cover chamber (110) is provided on the housing structure (100), and openings are provided at opposite ends of the main cover chamber (110); a gas circulation structure, the gas circulation structure penetrating the interior and exterior of the housing mechanism (100); The interior of the main cover chamber (110) and the end opening of the main cover chamber (110) are both connected to the gas circulation structure, so that the gas circulates inside and outside between the main cover chamber (110) and the gas circulation structure.

2. The main cover assembly for gas circulation according to claim 1, characterized in that: The gas circulation structure comprises a first gas circulation port (210), wherein the first gas circulation port (210) is opened on a side wall of the housing mechanism (100), and the first gas circulation port (210) corresponds to the main cover chamber (110).

3. The main cover assembly for gas circulation according to claim 2, characterized in that: The gas circulation structure comprises a second gas circulation port (220), wherein the second gas circulation port (220) is opened on the side wall of the shell mechanism (100), and the second gas circulation port (220) corresponds to the main cover chamber (110); wherein the second gas circulation port (220) and the second gas circulation port (220) are arranged at an interval.

4. The main cover assembly for gas circulation according to claim 3, characterized in that: The housing structure (100) comprises a main cover housing (120) and a flow guide connected to the main cover housing (120), the main cover housing (120) being provided with a main cover channel (121), the flow guide being provided with a flow guide channel (131), the main cover channel (121) being communicated with the flow guide channel (131) to form the main cover chamber (110); The deflector is provided with a deflector gas concave edge (132), and the deflector gas concave edge (132) passes through the inside and outside of the deflector channel (131); the main cover shell (120) has a main cover gas concave edge (122), and the deflector gas concave edge (132) and the deflector gas cooperate to form a first gas circulation port (210); the second gas circulation port (220) is provided on the main cover shell (120), and the first gas circulation port (210) and the second gas circulation port (220) are arranged opposite to each other.

5. The main cover assembly for gas circulation according to claim 1, characterized in that: The housing mechanism (100) is provided with a valve structure (140), and the valve structure (140) is used to open or close the main cover chamber (110).

6. The main cover assembly for gas circulation according to claim 5, characterized in that: In the first direction, the position at which the valve structure (140) closes the main cover chamber (110) is higher than the position at which the gas circulation structure is located on the housing mechanism (100).

7. The main cover assembly for gas circulation according to claim 6, characterized in that: The outer wall of the housing mechanism (100) is sleeved with a main cover sealing ring. In a first direction, the position of the main cover sealing ring on the housing mechanism (100) is higher than the position where the valve structure (140) closes the main cover chamber (110).

8. The main cover assembly for gas circulation according to claim 1, characterized in that: The inner side wall of the housing mechanism (100) is provided with a first annular step (150), a second annular step (160) and a third annular step (170); in a first direction, the first annular step (150), the second annular step (160) and the third annular step (170) are in a step structure that descends sequentially from the outside to the inside; The center line of the first annular step (150) coincides with the center line of the main cover chamber (110), and the second annular step (160) and the third annular step (170) are both offset from the center line of the main cover chamber (110).

9. A main cover unit, characterized in that: A main cover assembly for gas circulation comprising any one of claims 1 to 8.

10. A capless refueling device, characterized in that: include: The main cover unit as claimed in claim 9; A secondary gate unit, the main cover unit and the secondary gate unit are fixedly matched, the secondary gate unit is provided with a secondary gate chamber (310), and the secondary gate chamber (310) is docked with and communicated with the main cover chamber (110).

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