CN118744625A - Drainage structure for auxiliary gate unit, auxiliary gate unit and coverless refueling device - Google Patents

Abstract

The present invention relates to the technical field of automobile refueling devices, and provides a drainage structure for an auxiliary gate unit, an auxiliary gate unit and a coverless refueling device, wherein the drainage structure comprises: a drainage port, which is arranged on the auxiliary gate unit; a drainage channel, which is arranged on the auxiliary gate unit, and the drainage channel is connected to the drainage port; a blocking mechanism, which is arranged on the auxiliary gate unit, and the blocking mechanism 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 be switched from the open state to the blocking state under the action of an external force to block the drainage channel, thereby avoiding the decrease in the sealing performance of the refueling device and the partial structural damage of the refueling device caused by the insertion of a refueling gun after freezing; and since there are certain sealing requirements for the auxiliary gate unit and the entire refueling device during refueling, a blocking mechanism is provided to block the drainage channel and the drainage port, thereby achieving sealed refueling and being able to correspond to a steam reflux type refueling gun.

Description

Drainage structure for auxiliary gate unit, auxiliary gate unit and coverless refueling device

Technical Field

The present invention relates to the technical field of automobile refueling devices, and in particular to a drainage structure for an auxiliary gate unit, the auxiliary gate unit and a capless refueling device.

Background Art

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.

After a refueling device has been used for a long time, if water, dust, etc. enter the sub-gate unit of the refueling device, it may cause the sealing to decrease and the refueling gun to be inserted after freezing, causing partial structural damage to the refueling device.

Summary of the invention

The present invention provides a drainage structure for a secondary gate unit, which is used to solve the problem in the related art that after a refueling device is used for a long time, when water and dust enter the secondary gate unit of the refueling device, it may cause the sealing to decrease and the refueling gun to be inserted after freezing, causing partial structural damage of the refueling device.

The present invention provides a drainage structure for a secondary gate unit, comprising:

a drainage outlet, provided in the auxiliary gate unit;

A drainage channel is provided in the auxiliary gate unit, and the drainage channel is connected with the drainage port;

A blocking mechanism is provided on the auxiliary gate unit, and the blocking mechanism 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 be switched from the open state to the blocked state under the action of an external force to block the drainage channel.

According to a drainage structure for a secondary gate unit provided by the present invention, the blocking mechanism has an elastic blocking area, the elastic blocking area is used to block the drainage channel, and the elastic blocking area has a first angle and a second angle;

When the elastic blocking area is at the first angle, the elastic blocking area and the drainage channel are spaced apart;

When the elastic blocking area is subjected to external pressing force, the elastic blocking area is elastically deformed, the elastic blocking area rotates to the second angle, and the elastic blocking area contacts the drainage channel to close the drainage channel;

When the external pressing force applied to the elastic blocking area is cancelled, the elastic locking structure returns to the first angle, and the elastic blocking area is separated from the drainage channel.

According to a drainage structure for a secondary gate unit provided by the present invention, the blocking mechanism includes an elastic plate, the elastic plate has a fixed end and a free end, the fixed end of the elastic plate is mounted on the secondary gate unit, and the free end of the elastic plate faces the drainage channel and the two are arranged at a distance, and the elastic blocking area is formed on the plate surface at the free end of the elastic plate;

Wherein, the free end of the elastic plate can be attached to the side wall area of the auxiliary gate unit corresponding to the drainage channel, so that the elastic blocking area covers the drainage channel accordingly.

According to a drainage structure for an auxiliary gate unit provided by the present invention, the blocking mechanism further comprises a rubber member, the rubber member is located on one side of the elastic plate, one end of the rubber member is mounted on the auxiliary gate unit, and the other end of the rubber member is provided with an abutting protrusion;

The free end of the elastic plate is provided with a folding plate portion, and the rubber member is provided with a contact protrusion, and the contact protrusion contacts the plate surface of the folding plate portion;

Wherein, the cross-sectional area of the abutting protrusion is larger than the cross-sectional area of the folding plate portion.

According to a drainage structure for an auxiliary gate unit provided by the present invention, the auxiliary gate unit comprises a gate bracket and a fuel gun rail, the gate bracket is arranged on one side of the fuel gun rail, and the fuel gun rail is provided with the drainage channel;

Among them, the fixed end of the elastic plate is installed on the fuel gun guide rail, one end of the rubber part is installed on the fuel gun guide rail, and the upper parts of the gate bracket and the fuel gun guide rail are stacked and clamp the elastic plate and the rubber part.

According to a drainage structure for a secondary gate unit provided by the present invention, the fixed end of the elastic plate is curved, a fixed channel is provided on the gate bracket, and openings are set at both ends of the fixed channel; the fixed end of the elastic plate is inserted into the fixed channel, and the fixed end of the elastic plate and the fixed channel are adapted to each other and elastically abut against each other.

According to a drainage structure for a secondary gate unit provided by the present invention, a mounting slot is provided on the fueling gun guide rail, and a blocking protrusion is provided on the side wall of the mounting slot;

The rubber part is provided with a mounting arm and a mounting channel along its width direction, and the mounting channel is formed between the mounting arm and one end of the rubber part;

The mounting arm is inserted into the mounting slot, the blocking protrusion extends into the mounting channel, and the blocking protrusion and the mounting arm overlap in projection on the bottom of the mounting slot to limit the mounting arm from being separated from the mounting slot.

According to a drainage structure for a secondary gate unit provided by the present invention, the rubber part is provided with a guide positioning channel along the first direction; the gate bracket is provided with a guide positioning protrusion along the first direction, the guide positioning protrusion is clamped in the guide positioning channel, and the guide positioning protrusion and the guide positioning channel can slide relative to each other.

The present invention also provides a secondary gate unit, comprising the above-mentioned drainage structure for the secondary gate unit.

The present invention also provides a capless refueling device, comprising the auxiliary gate unit described above.

The drainage structure for the auxiliary gate unit provided by the present invention can discharge the water entering the auxiliary gate unit from the drainage channel and the drainage port through the specially designed drainage port and drainage channel, thereby avoiding the reduction in the sealing performance of the refueling device and the partial structural damage of the refueling device caused by the insertion of the refueling gun after freezing. Since there are certain sealing requirements for the auxiliary gate unit and the entire refueling device during refueling, a sealing mechanism is provided to seal the drainage channel and the drainage port, so as to achieve sealed refueling while also being able to cope with steam reflux type refueling guns.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is an overall schematic diagram of a capless refueling device provided by the present invention;

FIG2 is a cross-sectional schematic diagram of a capless refueling device provided by the present invention;

FIG3 is a schematic cross-sectional view of a secondary gate unit provided by the present invention;

FIG4 is an exploded schematic diagram of the auxiliary gate unit provided by the present invention;

FIG5 is a schematic cross-sectional view of a fueling gun guide rail provided by the present invention;

FIG6 is an enlarged schematic diagram of the structure at A in FIG5 ;

7 is a schematic structural diagram of the auxiliary gate housing provided by the present invention;

FIG8 is a schematic structural diagram of a main cover unit provided by the present invention;

FIG9 is an exploded schematic diagram of the main cover unit provided by the present invention;

FIG10 is a cross-sectional schematic diagram of a valve structure provided by the present invention;

FIG11 is an exploded schematic diagram of a valve structure provided by the present invention;

FIG12 is a schematic structural diagram of a flow guide provided by the present invention from a first viewing angle;

FIG. 13 is a schematic structural diagram of the deflector provided by the present invention from a second viewing angle.

Reference numerals:

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, guide slope; 180, buckle structure; 190, guide slope; 200, gate structure; 210, gate bracket; 211, first mounting groove; 212, first protrusion; 213, first positioning channel; 214, first positioning groove; 215, gate channel; 216, avoidance slope; 217, guide positioning 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; 2 22, second positioning groove; 223, push boss; 2231, push recess; 230, gate spring; 231, spiral rod section; 232, drive rod section; 300, fuel gun guide rail; 310, drainage channel; 321, fixing channel; 322, installation slot; 3221, blocking protrusion; 323, plug-in groove; 330, second positioning portion; 340, guide channel; 341, guide curved surface; 3411, first arc segment; 3412, second arc segment; 3413, guide segment; 350, elastic locking structure; 400, blocking mechanism; 410, elastic plate; 411, elastic blocking area; 412, folding plate; 420, rubber part; 421, contact protrusion; 422, installation arm; 423, installation channel; 424, guide positioning channel;

510, first sealing ring; 520, second sealing ring; 530, main shaft; 540, main cover spring; 550, main cover sealing layer; 560, main cover sealing ring; 600, main cover housing; 610, main cover channel; 620, limiting boss; 630, first opening; 640, second opening; 650, stop structure; 670, connecting protrusion;

700, flow guide; 710, flow guide channel; 711, first straight section; 712, inclined guide section; 713, second straight section; 720, guide structure; 730, limit structure; 740, spoiler structure; 750, elastic positioning structure; 760, notch; 780, connecting groove;

800, valve structure; 810, lower cover; 811, lower chamber; 812, pressure inlet hole; 820, upper cover; 821, upper chamber; 824, pushing concave surface; 830, valve body assembly; 831, valve body; 832, valve body sealing layer; 833, valve body reset member; 910, first gas circulation port; 920, second gas circulation port 920.

DETAILED DESCRIPTION

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.

The drainage structure for the auxiliary gate unit, the auxiliary gate unit and the capless refueling device of the present invention are described below in conjunction with Figures 1 to 13. The capless refueling device includes an auxiliary gate unit and a main cover unit.

1 to 4 , a secondary gate unit is provided according to the present invention, including a secondary gate housing 100 , a gate structure 200 , a fueling gun guide rail 300 , and the above-mentioned drainage structure.

3 to 7 , specifically, according to the present invention, there is provided a drainage structure for an auxiliary gate unit, comprising: a drain port 120, provided in the auxiliary gate unit; a drainage channel 310, provided in the auxiliary gate unit, the drainage channel 310 being communicated with the drain port 120; a blocking mechanism 400, provided in the auxiliary gate unit, the blocking mechanism 400 having a blocking state and an open state; wherein the blocking mechanism 400 in the open state can open the drainage channel 310; the blocking mechanism 400 can be switched from the open state to the blocking state under the action of an external force to block the drainage channel 310.

The drainage structure for the auxiliary gate unit provided by the present invention can discharge the water entering the auxiliary gate unit from the drainage channel 310 and the drainage port 120 through the specially designed drainage port 120 and the drainage channel 310, thereby avoiding the decrease in the sealing performance of the refueling device and the partial structural damage of the refueling device caused by the insertion of the refueling gun after freezing. Since 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 drainage channel 310 and the drainage port 120, so as to achieve sealed refueling while also being compatible with steam reflux type refueling guns.

Specifically, referring to FIGS. 1 to 7 , it can be understood that, in the embodiment of the present invention, the auxiliary gate housing 100 is provided with a drain port 120 , and the fueling gun guide rail 300 is provided with a drain channel 310 communicating with the drain port 120 .

Specifically, referring to FIGS. 1 to 7 , in an embodiment of the present invention, the auxiliary gate housing 100 is provided with a first inlet, a first outlet and an auxiliary gate chamber 110, the first inlet and the first outlet are respectively located at opposite ends of the auxiliary gate chamber 110, the first inlet, the auxiliary gate chamber 110 and the first outlet are sequentially connected for inserting a refueling gun; the 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; the refueling gun guide rail 300 is used to guide the movement of the refueling gun, and the refueling gun guide rail 300 is fixedly arranged inside the auxiliary gate chamber 110, and the refueling gun guide rail 300 is located on one side of the gate structure 200;

The blocking mechanism 400 is detachably installed between the gate structure 200 and the fueling gun guide rail 300 to facilitate disassembly, assembly and maintenance.

It can also be understood that, referring to FIGS. 1 to 7 , in the embodiment of the present invention, in the first direction, one end of the gate structure 200 abuts against the inner wall of one end of the auxiliary gate chamber 110, and the other end of the gate structure 200 abuts against one end of the fuel gun guide rail 300; wherein, when the gate structure 200 is subjected to the push force of the fuel 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 fuel gun, the first inlet is closed, and the closing direction of the gate structure 200 is toward the location of the first inlet. Through the above structure, when refueling, there is no need to unscrew the auxiliary gate unit, and the fuel gun is directly inserted, and the gate structure 200 is pushed by the fuel gun to open the first inlet, so that the fuel gun is inserted into the auxiliary gate chamber 110, the gate structure 200 and the fuel gun guide rail 300 to achieve the refueling operation. Through the above structure, the operation of opening and closing the fuel filler cap is omitted when refueling, and the first inlet can only be opened when the gate structure 200 is subjected to the push force of the fuel gun, and the door opening direction is toward the position of the first outlet; the first inlet can only be closed after the gate structure 200 is out of contact with the fuel gun, and the door closing direction is toward the position of the first inlet. The above gate structure 200 is a single-door structure to prevent water and dust from entering, and can ensure that the door is tightly closed in the non-refueling state, achieving waterproof and dustproof, saving time and effort, and avoiding the situation of 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 abutted and matched in sequence, which improves the stability of the gate structure 200, thereby improving the stability and reliability of the entire auxiliary gate unit.

Specifically, referring to Figures 3 to 6, 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 and the drainage channel 310 are spaced apart; when the elastic sealing area 411 is subjected to an external pressing force, the elastic sealing area 411 is elastically deformed, and the elastic sealing area 411 rotates to the second angle, and the elastic sealing area 411 contacts the drainage channel 310 to close the drainage channel 310; when the external pressing force applied to the elastic sealing area 411 is cancelled, the elastic locking structure 350 returns to the first angle, and the elastic sealing area 411 is separated from the drainage channel 310.

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.

It can also be understood that, referring to Figures 3 to 6, in an embodiment of the present invention, the sealing mechanism 400 includes an elastic plate 410, the elastic plate 410 has a fixed end and a free end, the fixed end of the elastic plate 410 is installed on the auxiliary gate unit, 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 sealing 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 auxiliary gate unit corresponding to the drainage channel 310, so that the elastic sealing area 411 domain corresponds to covering the drainage channel 310.

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 and easy to manufacture and install. The free end of the elastic plate 410 can be attached to the side wall area at the corresponding drainage channel 310, ensuring the precise positioning of the blocking area and effectively covering the drainage channel 310 and the drain outlet 120; the installation position of the fixed end of the elastic plate 410 is stable, and can reliably support the elastic blocking area 411, maintain stability during the refueling process, and ensure the blocking effect.

Specifically, referring to Figures 3 to 6, in an 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, and one end of the rubber component 420 is installed on the auxiliary gate unit. The rubber component 420 and the elastic plate 410 are used in combination to better seal the drainage channel 310, and the elastic characteristics of the rubber component 420 are used to absorb the impact force generated during the movement and reduce the movement noise, while also protecting the elastic plate 410 from excessive wear.

3 to 6 , in an embodiment of the present invention, a butt protrusion 421 is provided at the other end of the rubber member 420; a folding plate portion 412 is provided at the free end of the elastic plate member 410, and a butt protrusion 421 is provided on the rubber member 420, and the butt protrusion 421 is in contact with the plate surface of the folding plate portion 412; wherein the cross-sectional area of the butt protrusion 421 is greater than the cross-sectional area of the folding plate portion 412.

Through the above-mentioned arrangement, the abutment protrusion 421 of the rubber component 420 abuts against the folding plate portion 412 of the elastic plate component 410 to form a more perfect sealing structure, which improves the sealing effect and reduces friction, so as to provide smoother and more stable performance during mechanical operation; the abutment protrusion 421 on the rubber component 420 is in surface contact with the folding plate portion 412 on the elastic plate component 410, so that the contact area of the abutment point is smaller, thereby reducing friction, 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 abutment protrusion 421 is smaller than the folding plate portion 412 can ensure that the abutment 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.

It should be noted that, referring to Figures 3 to 6, in an embodiment of the present invention, the gate structure 200 includes a gate bracket 210, the gate bracket 210 is arranged on one side of the fuel gun guide rail 300, the fixed end of the elastic plate 410 is installed on the fuel gun guide rail 300, and one end of the rubber part 420 is installed on the fuel gun guide rail 300. The upper parts of the gate bracket 210 and the fuel gun guide rail 300 are stacked and clamp the elastic plate 410 and the rubber part 420.

Through the above arrangement, the free end of the elastic plate 410 can be attached to the refueling gun guide rail 300 of the auxiliary gate unit, corresponding to the side wall area at the drainage channel 310, ensuring the precise positioning of the blocking area. In addition, the stacked arrangement can increase the stability and rigidity of the entire structure, making it less likely to loosen or deform during operation. 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.

It should be noted that, in addition, the presence of the elastic plate 410 also helps to compensate for the dimensional changes caused by mechanical tolerance and thermal expansion, so that the entire sealing mechanism 400 can maintain good sealing and stability in various working environments.

It can be understood that, referring to Figures 3 to 6, in an embodiment of the present invention, the fixed end of the elastic plate 410 is curved, a fixed channel 321 is provided on the gate bracket 210, and openings are set at both ends of the fixed channel 321; the fixed end of the elastic plate 410 is inserted into the fixed channel 321, and the fixed end of the elastic plate 410 and the fixed channel 321 are adapted to each other and elastically abut against each other.

With the above structure, the fixed end of the curved elastic plate 410 elastically abuts against the side wall of the fixed channel 321, generating a certain elastic contact, 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. Part of the structure of the gate bracket 210 abuts against the inner plate surface of the fixed end of the elastic plate 410, which helps to limit the fixed end of the elastic plate 410 from detaching from the fixed channel 321, further improving the safety and reliability of the blocking mechanism 400, and ensuring its normal operation during operation; at the same time, due to the elastic matching relationship, maintenance and replacement become simpler and more convenient.

It can be understood that, referring to Figures 3 to 6, in the embodiment of the present invention, a mounting slot 322 is provided on the fuel gun guide rail 300, and a blocking protrusion 3221 is provided on the side wall of the mounting slot 322; a mounting arm 422 and a mounting channel 423 are provided on the rubber part 420 along its width direction, and the mounting channel 423 is formed between the mounting arm 422 and one end of the rubber part 420; the mounting arm 422 is inserted into the mounting slot 322, and the blocking protrusion 3221 extends into the mounting channel 423, and the blocking protrusion 3221 and the mounting arm 422 have overlapping projections on the bottom of the mounting slot 322 to limit the mounting arm 422 from being separated from the mounting slot 322.

Through the above-mentioned arrangement, the mounting arm 422 is inserted into the mounting slot 322, and the blocking protrusion 3221 in the slot will extend into the mounting arm 422. 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 mounting arm 422 and the blocking protrusion 3221 at the bottom of the mounting slot 322 overlap in projection, a mechanical locking mechanism is formed. The above-mentioned design features ensure that the mounting arm 422 will not easily detach from the mounting slot 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.

It should also be noted that, with reference to Figures 3 to 6, in an embodiment of the present invention, the rubber component 420 is provided with a guide positioning channel 424 along the first direction; the gate bracket 210 is provided with a guide positioning protrusion 217 along the first direction, the guide positioning protrusion 217 is clamped in the guide positioning channel 424, and the guide positioning protrusion 217 and the guide positioning channel 424 can slide relative to each other. When the refueling gun is inserted, the rubber component 420 is pushed to drive the elastic plate 410 to move to block the drainage channel 310 and the drainage outlet 120. At this time, the movement direction of the rubber component 420 is limited by the relative directional sliding of the guide positioning protrusion 217 and the guide positioning channel 424.

Specifically, referring to Figure 4, in an embodiment of the present invention, the gate bracket 210 is further provided with two positioning concave surfaces 218, and the two positioning concave surfaces 218 are respectively located on opposite sides of the guide positioning protrusion 217, so that when the rubber component 420 is in the initial state, part of the structure of the rubber component 420 is accommodated in the positioning concave surfaces 218, that is, the projections of the rubber component 420 and the gate bracket 210 in the first direction overlap, making the structure more compact and making rational use of space, which is conducive to reducing the overall volume of the auxiliary gate unit, so that the relative position of the rubber component 420 on the gate bracket 210 can be accurately positioned, while ensuring the stability between the rubber component 420 and the gate bracket 210 and the refueling gun guide rail 300.

2 to 4, the gate structure 200 further includes a gate member 220 and a gate spring 230. The gate member 220 is movably connected to one end of the gate bracket 210. The gate member 220 moves relative to the gate bracket 210 to have a first position and a second position. The gate bracket has a gate passage 215. When the gate member 220 is in the first position, the gate member 220 blocks the gate passage 215. When the gate member 220 is in the second position, the gate member 220 releases the gate passage 215. 15 blocking; gate spring 230, gate spring 230 and gate member 220 transmission cooperation, gate spring 230 is used to drive gate member 220 to move toward the first position direction; wherein, gate bracket 210, gate member 220 and gate spring 230 are configured as a split structure, and the projection length of the part of the gate spring 230 that cooperates with the gate member 220 on the gate member 220 is greater than the distance from the outer wall of the gate member 220 to the center line of the gate member 220. By adopting the above structure, the gate member 220 opens the gate channel 215 at the second position or closes the gate channel 215 at the first position when needed, and realizes automatic closing through the power of the gate reset member. The configuration allows the gate support 210, the gate member 220 and the gate reset member to be a split structure, which simplifies the structure, facilitates manufacturing, reduces costs, and can be easily disassembled; moreover, the projection length of the partial structure of the gate reset member that cooperates with the gate member 220 on the gate member 220 is greater than the distance from the outer wall of the gate member 220 to the center line of the gate member 220, which can increase the stability and reliability of the closing force and ensure that the gate structure 200 can always maintain good sealing performance and operating efficiency during operation.

Specifically, referring to Figures 2 to 4, in an 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 face opening and a first side face 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 face 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 face opening and the first side face 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.

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 installed and disassembled more conveniently 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.

Specifically, referring to Figures 2 to 4, in an embodiment of the present invention, the gate spring 230 includes two spiral rod segments 231 and a driving rod segment 232, and the opposite sides of the driving rod segment 232 are respectively connected to the two spiral rod segments 231; wherein, the gate bracket 210 is provided with two first positioning channels 213 along the first direction, and the two spiral rod segments 231 correspond to the two first positioning channels 213 one by one and are plug-in matched to limit the rotation of the gate spring 230 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 two spiral rod segments 231 of the gate spring 230 correspond one-to-one with the two first positioning channels 213 and are plug-fitted, which limits the rotation of the gate spring 230 relative to the gate bracket 210 and ensures the stability and controllability of the gate spring 230 in the process of driving the movement of the gate member 220; the driving rod segment 232 abuts against the inner surface of the gate member 220, which means that the driving rod segment 232 provides a supporting force to support the movement of the gate member 220. The above connection method ensures that the movement of the gate spring 230 can accurately drive the gate member 220 to achieve the opening and closing function.

Specifically, referring to Figures 2 to 4, in an embodiment of the present invention, the gate bracket 210 is provided with two first positioning grooves 214, and the bottom of each first positioning groove 214 is provided with a first positioning channel 213, the spiral area of the spiral rod segment 231 is located in the first positioning groove 214, and one end of the spiral rod segment 231 is inserted into the first positioning channel 213; wherein, the bottom of the first positioning groove 214 is used to support the spiral rod segment 231 to limit the movement of the spiral rod segment 231 along the first direction; the opposite side walls of the first positioning groove 214 abut against the opposite sides of the spiral rod segment 231 to limit the movement of the spiral rod segment 231 relative to the gate bracket 210 along the second direction; the first positioning channel 213 is used to limit the spiral rod segment 231 from detaching from the gate bracket 210 along the second direction. With the above structure, the setting of the first positioning groove 214 and the cooperation between the groove bottom and the two side walls and the spiral rod segment 231 can limit the movement of the spiral rod segment 231 in two directions, ensuring that it is firmly fixed on the gate bracket 210 at the specified position; through this positioning method, the connection between the spiral rod segment 231 and the gate bracket 210 is more firm and reliable, thereby enhancing the stability and reliability of the entire mechanism; the setting of the first positioning channel 213 can prevent the spiral rod segment 231 from accidentally detaching from the gate bracket 210 along the second direction, ensuring that it is always tightly connected to the bracket.

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

It can also be understood that, in the embodiment of the present invention, the inner surface of the gate member 220 is provided with a second positioning groove 222, the second positioning groove 222 is inserted and matched with the driving rod segment 232, and the opposite side walls of the second positioning groove 222 are matched with the opposite side walls of the driving rod segment 232 one by one, so as to limit the movement of the driving rod segment 232 in the second direction relative to the gate member 220. With the above structure, the second positioning groove 222 is provided 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, and avoiding loosening or falling off during use; by limiting the movement of the driving rod segment 232, the operating accuracy of the gate member 220 can be improved, ensuring that it can accurately perform the opening or closing action when needed.

It can also be understood that, with reference to Figures 2 to 4, in an embodiment of the present invention, the side wall of the gate channel 215 is provided with an avoidance slope 216, the avoidance slope 216 is inclined, the avoidance slope 216 is connected to the end face of the gate bracket 210, and the connection between the gate reset member and the gate bracket 210 and the avoidance slope 216 are arranged opposite to each other, which can effectively guide the refueling gun through the gate channel 215 so that it can smoothly enter or exit the channel, reduce resistance and friction during refueling, improve operational convenience, and extend the service life of the gate bracket 210; the connection between the gate spring 230 and the gate bracket 210 and the avoidance slope 216 are arranged opposite to each other, avoiding the collision of the gate spring 230 and the gate bracket 210 during the insertion of the refueling gun, ensuring the stable connection between the gate spring 230 and the bracket during operation, and providing support and stability.

It can also be understood that, referring to Figures 2 to 4, in the embodiment of the present invention, the outer surface of the gate member 220 is provided with a push boss 223, and the push boss 223 is provided with a push recess 2231, so that the insertion and pushing are smoother, 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.

It can be understood that, referring to FIGS. 2 to 4 , in the embodiment of the present invention, the auxiliary gate unit includes a first sealing ring 510, the first sealing ring 510 is located between the outer wall of the fueling 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.

It can be understood that, referring to FIGS. 2 to 4 , 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.

It should be noted that, in the present embodiment, the above-mentioned guide positioning 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.

It can be understood that, referring to Figures 2 to 4, in an embodiment of the present invention, the inner wall of the auxiliary gate housing 100 is provided with a plurality of positioning grooves 130, and the plurality of positioning grooves 130 are arranged at circumferential intervals, and 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 extend along the first direction; wherein, each elastic fixing member 2193 is provided with an elastic fixing protrusion 21931, and the elastic fixing protrusion 21931 is arranged along the second direction, and the elastic fixing protrusion 21931 is located on a side wall of the elastic fixing member 2193 away from the gate channel 215. It can be understood that the multiple elastic fixing parts 2193 make the elastic fixing 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.

It can also be understood that, in the embodiment of the present invention, a plurality of first positioning portions are provided on the gate bracket 210, and the plurality of first positioning portions are arranged at intervals around the outer wall of the gate bracket 210, and the first positioning portions arrange the gate bracket 210 along the first direction, and a first matching portion is provided on the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100, and the first matching portion is snap-fitted with the first positioning portion to limit the circumferential rotation of the gate bracket 210 relative to the auxiliary gate chamber 110.

Specifically, referring to FIG. 2, FIG. 4 and FIG. 7, in this embodiment, the outer wall of the fueling gun guide rail 300 is provided with a second positioning portion 330, and the inner wall of the auxiliary gate chamber 110 of the auxiliary gate housing 100 is provided with a second matching portion 150, and the second matching portion 150 is engaged with the second positioning portion 330 to limit the circumferential rotation of the fueling gun guide rail 300 relative to the auxiliary gate chamber 110. During the installation process, the matching structure of the second positioning portion 330 and the second matching portion 150 plays a positioning and limiting role, ensuring the stable installation of the fueling gun guide rail 300, while preventing problems caused by rotation during use. It can be understood that the above-mentioned second positioning portion 330 is a protruding structure, the second matching portion 150 is a groove structure, or the two can be replaced with each other.

Specifically, referring to Figures 4 to 6, in the embodiment of the present invention, the fueling gun guide rail 300 is provided with a guide channel 340 that passes 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 other end of the guide channel 340 close to the first outlet. The control of the fueling gun insertion can be achieved, and the larger inlet opening can facilitate the insertion of the fueling gun head, ensuring that the fueling gun remains stable during operation, operates smoothly, and prevents swinging or loosening, thereby improving the safety and efficiency of the fueling operation.

Specifically, referring to Figures 4 to 7, in an embodiment of the present invention, at least one fixed structure 160 is provided on the auxiliary gate housing 100, and at least one elastic locking structure 350 is provided on the outer wall of the fuel gun guide rail 300. The elastic locking structure 350 extends radially, and under the action of external force, the elastic locking structure 350 has a tendency to fit together with the outer wall of the fuel gun guide rail 300; wherein, the elastic locking structure 350 corresponds to the fixed structure 160 to limit the rotation of the fuel gun guide rail 300 relative to the auxiliary gate housing 100, which can ensure that the fuel gun guide rail 300 maintains a fixed position and direction during use, prevents accidental rotation or movement, and improves the accuracy and safety of operation.

Specifically, referring to FIG. 4 , in an embodiment of the present invention, the elastic locking structure 350 includes a connecting portion and a curved portion, one end of the connecting portion is connected to the outer side wall of the fuel gun rail 300, and the other end of the connecting portion is connected to the curved portion. With the above arrangement, one end of the connecting portion 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 makes the elastic locking structure 350 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 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.

It should be noted that, in the embodiment of the present invention, the fixing structure 160 is a fixing opening that passes through the inside and outside of the auxiliary gate housing 100, and the bent portion is inserted into the fixing opening. Specifically, in the embodiment of the present invention, the elastic positioning structure 350 is an elastic plate body integrally formed with the guide rail body.

Specifically, referring to Figures 4 to 6, in an embodiment of the present invention, a guide curved surface 341 is provided on the inner wall of the guide channel 340, and the guide curved surface 341 includes a first arc segment 3411, a second arc segment 3412 and a guide segment 3413 connected in sequence; wherein, the angles between the first arc segment 3411, the second arc segment 3412 and the center line of the guide channel 340 are both acute angles, and the guide segment 3413 is parallel to the center line of the guide channel 340. With the above structure, the acute angle design of the first arc segment 3411 and the second arc segment 3412 enables the fuel gun to smoothly pass through these curved surfaces during the insertion process, reducing the resistance and friction that may be encountered during insertion; the guide segment 3413 is parallel to the center line of the guide channel 340, ensuring the precise guidance of the fuel gun during the insertion process, avoiding deviation or skew, and allowing the fuel gun to accurately enter the target position. Therefore, the design of the guide curved surface 341 helps to firmly lock the fuel gun in the correct position, avoiding possible shaking or displacement during the refueling process, and ensuring the stability and safety of the fuel gun.

It can be understood that, referring to Figures 1 to 4 and Figure 7, in an embodiment of the present invention, a water guiding structure 170 is provided on the outer wall of the auxiliary gate housing 100, and the water guiding structure 170 is located at the lower side of the drain outlet 120. The water guiding structure 170 is used to guide the water body to flow to a preset position, thereby improving the drainage efficiency, thereby reducing the drainage time, and can also effectively prevent water accumulation and reduce the adverse effects of water flow on the structure and the surrounding environment.

It should be noted that, in the embodiment of the present invention, the water guide structure 170 is a water guide boss convexly provided on the outer side wall of the auxiliary gate housing 100; the upper side wall of the water guide boss is provided with a guide slope 171 for guiding water.

It should also be noted that, referring to Figures 1 and 2, 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 are arranged around the side wall of the auxiliary gate housing 100 and at intervals. 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.

Specifically, referring to Figure 2, in an embodiment of the present invention, the end wall of the auxiliary gate housing 100 is provided with a guide slope 190, and the guide slope 190 is arranged around the first inlet to improve insertion accuracy and operation convenience, and reduce possible damage risks, thereby optimizing the efficiency and safety of the refueling operation.

It can be understood that, referring to Figures 1, 2, 8 and 9, 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.

Specifically, referring to Figures 2 to 4, 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, and 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; the annular protrusion is inserted and circumferentially positioned with a part of the structure close to the second inlet on the main cover unit, wherein a part of the structure of the second sealing ring 520 is sleeved and matched with the annular protrusion, and another part of the structure of the second sealing ring 520 is abutted and matched with the main cover unit, so as to seal the butt connection between the first outlet and the second inlet. Through the above structure, a part of the structure of the second sealing ring 520 is sleeved and matched with the annular protrusion, and another part of the structure is abutted and matched with the main cover unit, thereby ensuring that the butt connection between the first outlet and the second inlet is reliably sealed, having an excellent sealing structure, and inhibiting the leakage of fuel vapor to the outside of the fuel tank.

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.

It can be understood that, with reference to FIGS. 8 to 13 , in an embodiment of the present invention, the main cover unit includes: a main cover housing 600, the main cover unit 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, for opening or closing the main cover channel 610, and the valve structure 800 can be automatically opened and pressure released, and the valve structure 800 is connected to the main cover housing 600. The cover shell 600 is rotatably connected, and the valve structure 800 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; wherein, the port of the main cover channel 610 cooperates with the valve structure 800 to form a two-way valve, and 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.

With the above structure, the main cover housing 600 and the deflector 700 constitute the main structure of the main cover unit, which can effectively isolate and protect the main cover channel 610 and internal components to prevent the influence of the external environment and the intrusion of substances; the main cover channel 610 is 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 will automatically open to release the pressure to prevent the fuel tank from being damaged, so as to protect safe operation.

Specifically, referring to Figures 2 and 8 to 11, in an embodiment of the present invention, a limiting boss 620 is provided at the port of the main cover channel 610, and 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 main cover cavity The interior of the chamber is connected to the outside of the main cover chamber through a pressure relief channel; 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, it cuts off the connection between the pressure inlet end and the pressure relief end of the pressure relief channel; 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 is adopted. 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 to allow the pressure inside the main cover chamber to be connected to the outside of the main cover chamber through the pressure relief channel. When the pressure in the main cover chamber exceeds the preset threshold, the valve body assembly 830 automatically enters the pressure relief state. The valve body assembly 830 will be converted from a closed state to a pressure relief state, which means that the pressure inlet end and the pressure relief end of the pressure relief channel will be connected, thereby releasing the excessive pressure in the main cover chamber. The automatic response mechanism is conducive to ensuring that the fuel tank and the main cover unit will not be damaged or dangerous when the pressure is too high, providing safety protection; the lower cover 810 is rotatably connected to the main cover shell 600, which is conducive to the adjustment and flexible operation of the valve structure 800.

Specifically, referring to Figures 8 to 11, in an embodiment of the present invention, the lower cover 810 is provided with a lower chamber 811, and the upper cover 820 is provided with an upper chamber 821. The lower cover 810 and the upper cover 820 are nested and fixed, and the lower chamber 811 and the upper chamber 821 cooperate to form a valve body chamber. The valve body assembly 830 is movably installed in the valve body chamber. There is a 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. The pressure relief gap, the valve body chamber and the pressure inlet hole 812 are connected in sequence to form a pressure relief channel. With the above structure, under normal working conditions, when the external pressure on the valve body assembly 830 is less than the preset threshold, the valve body assembly 830 abuts against the bottom wall of the lower chamber 811, shielding the pressure inlet hole 812, thereby preventing pressure from leaking from the pressure inlet hole 812. At this time, it is in a closed state, ensuring the stability of the valve structure 800 under normal pressure. When the external pressure exceeds the preset threshold, the valve body assembly 830 will separate from the bottom wall of the lower chamber 811, exposing the pressure inlet hole 812, and it is in a pressure relief state. At this time, the pressure can be released through the pressure relief channel formed by the pressure inlet hole 812, the valve body chamber, and the pressure relief gap, reducing the pressure inside the main cover unit, helping to prevent damage caused by overpressure, and the pressure is controlled and released; the automatic adjustment mechanism reduces the need for manual intervention and improves safety and reliability.

Specifically, referring to Figures 8 to 11, in an embodiment of the present invention, the valve body assembly 830 includes: a valve body main body 831, the valve body main body 831 is movably arranged in the valve body chamber, the valve body main body 831 is provided with a valve body sealing layer 832, the cross-sectional area of the valve body sealing layer 832 is larger than the cross-sectional area of the pressure inlet hole 812, so as to seal the pressure inlet hole 812; a valve body reset member 833, one end of the valve body reset member 833 is installed on the valve body main body 831, and the other end of the valve body reset member 833 is installed on the valve body main body 831, and the valve body reset member 833 is used to drive the valve body main body 831 to abut against the bottom wall of the valve body chamber. Through the above arrangement, it is ensured that when the valve body main body 831 moves to the closed position, the valve body sealing layer 832 can completely cover and close the pressure inlet hole 812, maintain the normal pressure operation inside the main cover unit, and ensure safety and stability.

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; in addition, the valve body reset member 833 can also be an elastic sheet, an elastic column, etc., which is not limited here.

Specifically, in the embodiment of the present invention, an end surface of the upper cover 820 that is away from the lower cover 810 is provided with an arc-shaped pushing concave surface 824, and the pushing concave surface 824 is used to adapt to the refueling gun and can position the refueling gun.

Specifically, referring to FIGS. 8 to 11 , in the embodiment of the present invention, a main cover housing 600 is provided with a main shaft 530 and a main cover spring 540, the main cover spring 540 is sleeved on the main shaft 530, the lower cover 810 of the valve structure 800 is rotatably connected to the main shaft 530, and 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. The drive of the main cover spring 540 can ensure that the valve structure 800 is fitted to the preset position with appropriate pressure, thereby enhancing the sealing effect, reducing the user's operating burden, and improving ease of use.

Specifically, referring to Figures 8 to 11, 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.

It can be understood that, referring to Figures 2 and 8 to 11, in an embodiment of the present invention, a main cover sealing layer 550 is provided between the upper cover 820 and the lower cover 810, and when the valve structure 800 closes the main cover channel 610, the main cover sealing layer 550 is configured to seal between the valve structure 800 and the main cover channel 610 structure.

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.

It can be understood that, referring to Figures 8 and 9, in an embodiment of the present invention, the main cover unit is provided with a gas circulation structure, and the gas circulation structure includes a first gas circulation port 910 and a second gas circulation port 920. The first gas circulation port 910 is opened between the side wall of the main cover shell 600 and the deflector 700, and the second gas circulation port 920 is opened on the other side wall opposite to the main cover shell 600. The pressure can be further fully adjusted to more evenly distribute the gas flow, reduce possible local gas pressure or temperature changes, so as to optimize the gas circulation structure and improve flexibility, stability and safety.

It should also be noted that, in the embodiment of the present invention, the position where the valve structure 800 closes the main cover chamber is higher than the position where the gas circulation structure is located on the main cover housing 600. When the valve structure 800 needs to be operated or maintained, it will not affect the gas circulation structure, ensuring normal operation.

Specifically, referring to Figures 2, 8 and 9, 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, and 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. This can effectively prevent gas or liquid from leaking from the main cover chamber to the external environment, maintain airtightness, and reduce the risk of the main cover sealing ring 560 being damaged or accidentally destroyed.

It can be understood that, referring to Figures 2, 8, 9, 12 and 13, in an embodiment of the present invention, the deflector 700 is provided with a guide structure 720, a limiting structure 730 and a spoiler structure 740. The guide structure 720 is used to guide the insertion of the refueling gun. The refueling gun is guided by the guide structure 720 to a position abutting against the limiting structure 730 to limit the insertion stroke of the refueling gun. The spoiler structure 740 is used to slow down the outflow speed of the oil at the outlet end of the guide channel 710.

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.

It can also be understood that, referring to Figures 2, 8, 9, 12 and 13, in an embodiment of the present invention, the outer wall of the deflector 700 is provided with an elastic positioning structure 750, and the elastic positioning structure 750 is used to abut against the refueling pipe to limit the relative installation position of the deflector 700 and the refueling 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 filler pipe. The elastic deformation and resetting of the elastic positioning structure 750 are used to limit the final installation position of the deflector 700. This can reduce the difficulty and complexity of the installation process of the deflector 700 and the fuel filler pipe, making the installation easier and more efficient. In some cases, for example, since the elastic positioning structure 750 is elastic, a small-diameter fuel filler pipe can also achieve an expanded diameter shape to accommodate a variety of fuel filler pipe size types.

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.

Specifically, in an embodiment of the present invention, the deflector 700 is provided with a notch 760, so that the deflector 700 can be adapted to some refueling pipes with smaller diameters; at the same time, the notch 760 not only serves to shrink the mouth, but also cooperates 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.

It can also be understood that, with reference to Fig. 2, Fig. 8, Fig. 9, Fig. 12 and Fig. 13, in 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, so when the fuel gun is inserted with the wrong force, the main cover shell 600 and the deflector 700 are separated, and the fuel gun will stop discharging oil or stop refueling when it is vibrated or subjected to external forces. 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 is also convenient for the main cover shell 600 and the deflector 700 to be replaced with corresponding sizes, improving adaptability and flexibility.

Specifically, in an embodiment of the present invention, the main cover shell 600 and the deflector 700 are detachably connected together via a connecting structure, and the connecting structure includes a connecting protrusion 670 and a connecting groove 780, wherein the connecting protrusion 670 is provided at an end of the main cover shell 600 opposite to the deflector 700, and the connecting groove 780 is provided at an end of the deflector 700 opposite to the main cover shell 600; wherein the connecting protrusion 670 and the connecting groove 780 are snap-fitted together, and the projections of the opposite ends of the main cover shell 600 and the deflector 700 overlap, so as to increase the tightness and stability of the connection, and further improve the reliability.

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.

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.

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.

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 (10)

1. A drain structure for a sub-gate unit, comprising:

A drain port (120) provided in the sub-gate unit;

a drain passage (310) provided in the sub-gate unit, the drain passage (310) communicating with the drain port (120);

The blocking mechanism (400) is arranged on the auxiliary gate unit, and the blocking mechanism (400) is provided with a blocking state and an opening state;

wherein the blocking mechanism (400) in an open state is capable of opening the drain passage (310); the blocking mechanism (400) can be switched from the open state to the blocking state under the action of external force so as to block the drainage channel (310).

2. A drainage structure for a secondary gate unit according to claim 1, characterized in that the plugging means (400) has an elastic plugging zone (411), the elastic plugging zone (411) being for plugging the drainage channel (310), the elastic plugging zone (411) having a first angle and a second angle;

When the elastic blocking area (411) is at the first angle, the elastic blocking area (411) is arranged at intervals with the drainage channel (310);

When the elastic blocking area (411) is subjected to an externally applied pressing force, the elastic blocking area (411) is elastically deformed, the elastic blocking area (411) rotates to the second angle, and the elastic blocking area (411) is contacted with the drainage channel (310) to close the drainage channel (310);

When the externally applied pressing force applied to the elastic blocking area (411) is removed, the elastic clamping structure (350) returns to the first angle, and the elastic blocking area (411) is separated from the drainage channel (310).

3. The drainage structure for a sub-gate unit according to claim 2, wherein 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 to the sub-gate unit with the free end of the elastic plate member (410) facing the drainage channel (310) and being spaced apart therefrom, the elastic blocking area (411) being formed at a plate surface at the free end of the elastic plate member (410);

Wherein the free end of the elastic plate (410) can be attached to a side wall area of the auxiliary gate unit corresponding to the drainage channel (310) so that the elastic blocking area (411) correspondingly covers the drainage channel (310).

4. A drainage structure for a secondary gate unit according to claim 3, wherein the plugging mechanism (400) further comprises a glue piece (420), the glue piece (420) is located at one side of the elastic plate (410), one end of the glue piece (420) is mounted on the secondary gate unit, and the other end of the glue piece (420) is provided with an abutting protrusion (421);

The free end of the elastic plate (410) is provided with a folded plate part (412), the glue piece (420) is provided with an abutting protrusion (421), and the abutting protrusion (421) is abutted with the plate surface of the folded plate part (412);

Wherein the cross-sectional area of the abutting projection (421) is larger than the cross-sectional area of the folded plate part (412).

5. The drain structure for a sub-gate unit according to claim 4, wherein the sub-gate unit includes a gate bracket (210) and a nozzle rail (300), the gate bracket (210) being provided at one side of the nozzle rail (300), the nozzle rail (300) being provided with the drain passage (310);

The fixed end of the elastic plate (410) is mounted on the oiling gun guide rail (300), one end of the rubber piece (420) is mounted on the oiling gun guide rail (300), and the gate support (210) and the upper part of the oiling gun guide rail (300) are arranged in a stacked mode and clamp the elastic plate (410) and the rubber piece (420).

6. The drainage structure for a sub-gate unit according to claim 5, wherein the fixed end of the elastic plate member (410) is curved, the gate bracket (210) is provided with a fixed channel (321), and two ends of the fixed channel (321) are provided with through openings; the fixed end of the elastic plate (410) is inserted into the fixed channel (321), and the fixed end of the elastic plate (410) is matched with the fixed channel (321) in an elastic abutting fit.

7. The drain structure for the sub-gate unit according to claim 5, wherein the fuel dispenser rail (300) is provided with a mounting groove (322), and a blocking protrusion (3221) is provided on a side wall of the mounting groove (322);

the glue piece (420) is provided with a mounting arm (422) and a mounting channel (423) along the width direction, and the mounting channel (423) is formed between the mounting arm (422) and one end of the glue piece (420);

the mounting arm (422) is inserted into the mounting groove (322), the blocking protrusion (3221) extends into the mounting channel (423), and the projections of the blocking protrusion (3221) and the mounting arm (422) are overlapped on the groove bottom of the mounting groove (322) so as to limit the mounting arm (422) to be separated from the mounting groove (322).

8. The drainage structure for a secondary gate unit according to claim 5, wherein the glue (420) is provided with a guiding and positioning channel (424) along a first direction; the gate bracket (210) is provided with a guide positioning protrusion (217) along a first direction, the guide positioning protrusion (217) is clamped in the guide positioning channel (424), and the guide positioning protrusion (217) and the guide positioning channel (424) can slide relatively.

9. A sub-gate unit comprising the drain structure for a sub-gate unit according to any one of claims 1 to 8.

10. A capless refueling device comprising a sub-gate unit as recited in claim 9.