An auxiliary device for spraying an automobile fuel tank cap

Abstract

The present invention discloses an auxiliary device for spraying an automobile fuel tank cap, which is used to support between the fuel tank cap and the periphery of the fuel filling port. The fuel tank cap is rotatably connected to the periphery of the fuel filling port, so that the fuel tank cap can move towards the fuel filling port to cover the fuel filling port or move away from the fuel filling port to open the fuel filling port. The auxiliary device for spraying an automobile fuel tank cap includes a first support portion and a second support portion. The first support portion is installed on the periphery of the fuel filling port, and the first support portion includes a first abutting portion. The second support portion is installed inside the fuel tank cap, and the second support portion includes a second abutting portion. The second abutting portion is used to abut against the first abutting portion when the fuel tank cap covers the fuel filling port, ensuring that the structure is stable when the fuel tank cap covers the fuel filling port and facilitating the painting of the vehicle body. In this application, the bump contact parts between the fuel tank cap and the spraying auxiliary device are transferred to the first abutting portion and the second abutting portion, effectively avoiding the problem of paint quality affected by bumps on the fuel tank cap, and the effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive body spraying, and particularly relates to an auxiliary device for spraying an automotive fuel tank cover. Background Art

[0002] When spraying an automotive body, it is usually necessary to support between the fuel tank cover and the periphery of the fuel filler opening through a spraying auxiliary tooling. In the prior art, when the spraying auxiliary tooling separates the fuel tank cover plate from the border of the fuel filler opening, there is a risk that the spraying auxiliary tooling directly touches the fuel tank cover, resulting in damage to the paint inside the fuel tank cover. Summary of the Invention

[0003] The main object of the present invention is to provide an auxiliary device for spraying an automotive fuel tank cover, aiming to solve the problem that in the prior art, the existing spraying auxiliary tooling causes damage to the paint inside the fuel tank cover during use.

[0004] To achieve the above object, the auxiliary device for spraying an automotive fuel tank cover provided by the present invention is used to support between the fuel tank cover and the periphery of the fuel filler opening. The fuel tank cover is rotatably connected to the periphery of the fuel filler opening, so that the fuel tank cover can move towards the fuel filler opening to cover the fuel filler opening or move away from the fuel filler opening to open the fuel filler opening. The auxiliary device for spraying an automotive fuel tank cover includes:

[0005] A first support portion for being installed on the periphery of the fuel filler opening, the first support portion including a first abutting portion; and,

[0006] A second support portion for being installed inside the fuel tank cover, the second support portion including a second abutting portion, and the second abutting portion is used to abut against the first abutting portion when the fuel tank cover covers the fuel filler opening.

[0007] Optionally, the first support portion includes a first insertion structure, the first insertion structure including an insertion main body and a plurality of insertion columns provided on the insertion main body, and the plurality of insertion columns are used to be inserted into a plurality of first process holes on the periphery of the fuel filler opening;

[0008] The first abutting portion is arranged on the insertion main body.

[0009] Optionally, the fuel tank cover is rotatably installed on the periphery of the fuel filler opening along the up-down axis;

[0010] The plurality of first process holes include a first insertion hole and a second insertion hole which are arranged at intervals along the periphery of the fuel filler opening. The first insertion hole extends along the front-back direction, and the second insertion hole extends along the up-down direction;

[0011] The plurality of plug-in columns include a first plug-in column and a second plug-in column. The first plug-in column extends in the front-rear direction and is used to be plugged into the first plug-in hole. The second plug-in column extends in the up-down direction and is used to be plugged into the second plug-in hole.

[0012] Optionally, two first plug-in holes are provided, and the two first plug-in holes are spaced apart in the up-down direction;

[0013] Two first plug-in columns are provided, and the two first plug-in columns are respectively plugged into the two first plug-in holes.

[0014] Optionally, the second support portion includes a second plug-in structure. The second plug-in structure includes a plug-in main body and a plurality of plug-in columns provided on the plug-in main body. The plurality of plug-in columns are used to be plugged into a plurality of second process holes inside the fuel tank cap;

[0015] The second abutting portion is provided on one of the plug-in main body or the plurality of plug-in columns.

[0016] Optionally, the fuel tank cap has an installation end and a fastening end which are oppositely arranged. The installation end is rotatably installed on the periphery of the fuel filling port;

[0017] The plurality of second process holes include a first plug-in hole provided adjacent to the fastening end and a second plug-in hole provided adjacent to the installation end. The first plug-in hole extends in the thickness direction of the fuel tank cap, and the second plug-in hole extends in the direction from the installation end to the fastening end;

[0018] The plurality of plug-in columns include a first plug-in column and a second plug-in column. The first plug-in column is used to be plugged into the first plug-in hole, and the second plug-in column is used to be plugged into the second plug-in hole.

[0019] Optionally, two first plug-in holes are provided, and the two first plug-in holes are spaced apart in the up-down direction;

[0020] Two first plug-in columns are provided, and the two first plug-in columns are used to be respectively plugged into the two plug-in holes.

[0021] Optionally, an installation hole is provided on the side surface of the plug-in main body facing the installation end;

[0022] The second plug-in column has a first plug-in end and a second plug-in end which are oppositely arranged. The first plug-in end is plugged into the installation hole, and the second plug-in end is used to be plugged into the second plug-in hole. A first annular boss protrudes from the middle of the side wall surface of the second plug-in column, and a second annular boss protrudes from the side part of the first plug-in end of the second plug-in column, so that a sleeving space is formed between the first annular boss and the second annular boss;

[0023] The second insertion structure further includes a sleeve and a compression spring. Both the sleeve and the compression spring are sleeved on the second insertion post and are located in the sleeved space. The sleeve is disposed adjacent to the first insertion end, and an end of the sleeve is used to abut against the periphery of the mounting hole.

[0024] Optionally, a side portion of the second insertion end of the second insertion post is provided with a step to form a step surface disposed away from the first insertion end, and the step surface is used to abut against the periphery of the second insertion hole.

[0025] Optionally, the first insertion end of the second insertion post is provided with a reduced size.

[0026] In the technical solution provided by the present invention, by mounting the first supporting portion on the periphery of the fuel filler opening and mounting the second supporting portion inside the fuel tank cap, when the fuel tank cap is closed on the fuel filler opening, the first abutting portion and the second abutting portion abut against each other, ensuring that when the fuel tank cap is closed on the fuel filler opening, the structure is stable and facilitating painting of the vehicle body. In the present application, the bump contact portion between the fuel tank cap and the painting auxiliary device is transferred to the first abutting portion and the second abutting portion, effectively avoiding the problem of paint quality damage caused by bumps on the fuel tank cap, and the effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0028] Figure 1 FIG. is a schematic structural diagram of the fuel tank cap mounted on the periphery of the fuel filler opening;

[0029] Figure 2 FIG. is a schematic diagram of the position layout of a plurality of first process holes on the periphery of the fuel filler opening;

[0030] Figure 3 FIG. is a schematic structural diagram of an embodiment of the painting auxiliary device provided by the present invention;

[0031] Figure 4 For Figure 3 FIG. is a schematic structural diagram of the first supporting portion (at one angle) in

[0032] Figure 5 For Figure 3 FIG. is a schematic structural diagram of the first supporting portion (at another angle) in

[0033] Figure 6For Figure 3 Schematic structural diagram of a part (at an angle) of the second support part in

[0034] Figure 7 For Figure 3 Schematic structural diagram of a part (at another angle) of the second support part in

[0035] Figure 8 For Figure 3 Schematic structural diagram of another part (at an angle) of the second support part in

[0036] Figure 9 For Figure 3 Schematic structural diagram of another part (at another angle) of the second support part in

[0037] Explanation of the reference numerals in the drawings:

[0038] Label Name Label Name 100 Spraying auxiliary device 22 Second insertion structure 200 Fuel tank cap 221 Insertion main body 201 Second process hole 2211 Mounting hole 201a First insertion hole 2212 Support arm 201b Second insertion hole 222 Insertion post 300 Fuel filling port 222a First insertion post 301 First process hole 222b Second insertion post 301a First insertion hole 2221 First annular boss 301b Second insertion hole 2222 Second annular boss 1 First support part 223 Sleeve 11 First abutting part 224 Compression spring 12 First insertion structure a Installation end 121 Insertion main body b Clamping end 122 Insertion post c First insertion end 122a First insertion post d Second insertion end 122b Second insertion post e Set space 2 Second support part f Step surface 21 Second abutting part g Avoidance groove

[0039] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] When spraying the vehicle body, it is usually necessary to support between the fuel tank cap and the periphery of the fuel filler opening through a spraying auxiliary tooling. In the prior art, when the spraying auxiliary tooling separates the fuel tank cover plate from the fuel filler opening frame, there is a risk that the spraying auxiliary tooling directly touches the fuel tank cap, resulting in damage to the paint inside the fuel tank cap.

[0044] In view of this, the present invention provides a spraying auxiliary device for an automotive fuel tank cap, wherein Figures 3 to 9 is a schematic structural diagram of an embodiment of the spraying auxiliary device provided by the present invention.

[0045] Please refer to Figures 1 to 3 , the spraying auxiliary device 100 for an automotive fuel tank cap is used to support between the periphery of the fuel tank cap 200 and the fuel filler opening 300. The periphery between the fuel tank cap 200 and the fuel filler opening 300 is rotatably connected, so that the fuel tank cap 200 can move towards the fuel filler opening 300 to cover the fuel filler opening 300 or move away from the fuel filler opening 300 to open the fuel filler opening 300. The spraying auxiliary device 100 includes a first support portion 1 and a second support portion 2. The first support portion 1 is used to be installed on the periphery of the fuel filler opening 300. The first support portion 1 includes a first abutting portion 11. The second support portion 2 is used to be installed inside the fuel tank cap 200. The second support portion 2 includes a second abutting portion 21. The second abutting portion 21 is used to abut against the first abutting portion 11 when the fuel tank cap 200 covers the fuel filler opening 300.

[0046] In the technical solution provided by the present invention, by installing the first support portion 1 on the periphery of the fuel filler opening 300 and installing the second support portion 2 inside the fuel tank cap 200, when the fuel tank cap 200 is closed on the fuel filler opening 300, the first abutting portion 11 and the second abutting portion 21 abut against each other, ensuring that the structure is stable when the fuel tank cap 200 is closed on the fuel filler opening 300, which is convenient for painting the vehicle body. In this application, the bump contact part between the fuel tank cap 200 and the spraying auxiliary device 100 is transferred to the first abutting portion 11 and the second abutting portion 21, effectively avoiding the problem of paint quality damage caused by bumps on the fuel tank cap 200, and the effect is good.

[0047] Specifically, referring to Figures 4 to 5 , the first support portion 1 includes a first insertion structure 12. The first insertion structure 12 includes an insertion main body 121 and a plurality of insertion posts 122 provided on the insertion main body 121. By inserting the plurality of insertion posts 122 into a plurality of first process holes 301 on the periphery of the fuel filler opening 300, the installation of the insertion main body 121 is realized. Since the first abutting portion 11 is provided on the insertion main body 121, the position of the first abutting portion 11 is fixed, and the structure is simple, which is convenient for the disassembly and assembly of the first support portion 1.

[0048] For the convenience of operation, the fuel tank cap 200 is rotatably installed around the vertical axis on the periphery of the fuel filler opening 300. The plurality of first process holes 301 include first insertion holes 301a and second insertion holes 301b that are spaced along the periphery of the fuel filler opening 300. The first insertion holes 301a extend in the front-rear direction, and the second insertion holes 301b extend in the vertical direction. The plurality of insertion posts 122 include first insertion posts 122a and second insertion posts 122b. The first insertion posts 122a extend in the front-rear direction, and the second insertion posts 122b extend in the vertical direction. By inserting the first insertion posts 122a into the first insertion holes 301a and inserting the second insertion posts 122b into the second insertion holes 301b, the position of the insertion main body 121 is fixed, and the rotation of the first insertion structure 12 is avoided, and the effect is good.

[0049] Furthermore, referring to Figure 2 , Figure 4 and Figure 5In the embodiment of the present application, two first insertion holes 301a are provided, and the two first insertion holes 301a are spaced apart in the up-down direction. Two first insertion columns 122a are provided, and by respectively inserting the two first insertion columns 122a into the two first insertion holes 301a, the insertion body 121 is limited in the up-down, left-right and right-directions, so that the insertion body 121 is stably installed, and the first abutment portion 11 arranged thereon is prevented from swinging or shaking.

[0050] Specifically, in an embodiment of the present application, the first abutting portion 11 is block-shaped, and the first abutting portion 11 is extended in the left-right direction. In the left-right direction, one end of the first abutting portion 11 is welded and fixed to the plug-in body 121, and the other end of the first abutting portion 11 is used to abut with the second abutting portion 21. In this way, the distance between the fuel tank cap 200 and the frame of the fuel filling port 300 meets the process quality requirements.

[0051] Specifically, refer to Figure 1 , Figures 6 to 9 The second support portion 2 includes a second plug-in structure 22, which includes a plug-in body 221 and a plurality of plug-in posts 222 arranged on the plug-in body 221. The plurality of plug-in posts 222 are inserted into a plurality of second process holes 201 on the inner side of the fuel tank cover 200, thereby realizing the installation of the plug-in body 221. Since the second abutment portion 21 is arranged on the plug-in body 221 or one of the plurality of plug-in posts 222, the position of the second abutment portion 21 is fixed, the structure is simple, and the disassembly and assembly of the second support portion 2 is convenient.

[0052] Specifically, refer to Figure 1 , Figure 3 and Figures 6 to 9 The fuel tank cover 200 has a mounting end a and a buckling end b that are relatively arranged, and the mounting end a is rotatably arranged on the periphery of the fuel filling port 300. The plurality of second process holes 201 include a first plug hole 201a arranged adjacent to the buckling end b and a second plug hole 201b arranged adjacent to the mounting end a. The first plug hole 201a is extended along the thickness direction of the fuel tank cover 200, and the second plug hole 201b is extended from the mounting end a to the buckling end b. The plurality of plug-in columns 222 include a first plug-in column 222a and a second plug-in column 222b. By inserting the first plug-in column 222a into the first plug-in hole 201a and inserting the second plug-in column 222b into the second plug-in hole 201b, the upper, lower, left and right directions of the plug-in body 221 are limited, thereby preventing the plug-in body 221 from swinging under its own gravity and affecting the installation effect.

[0053] Further, refer toFigure 6 and Figure 7 , two first insertion holes 201a are provided, and the two first insertion holes 201a are arranged at intervals in the up-down direction. Two first insertion posts 222a are provided. By respectively inserting the two first insertion posts 222a into the two first insertion holes 201a, the limit of the insertion main body 221 in the direction from the installation end a to the fastening end b is realized, avoiding the movement of the second abutting portion 21 provided on the insertion main body 221 or one of the plurality of insertion posts 222, and the installation effect is good.

[0054] Considering that the inner side of the fuel tank cover 200 also needs to be painted, referring to Figure 7 , the insertion main body 221 is bent to form an avoidance groove g facing the inner side surface of the fuel tank cover 200 and two support arms 2212 respectively arranged on both sides of the avoidance groove g. The two first insertion posts 222a are respectively arranged on the two support arms 2212. With such a setting, when the two first insertion posts 222a are respectively inserted into the corresponding two first insertion holes 201a, a gap is formed between the two support arms 2212 and the inner side surface of the fuel tank cover 200, so as to facilitate the uniform spraying of paint on the inner side surface of the fuel tank cover 200. The structure is simple and easy to operate.

[0055] Specifically, referring to Figure 3 , Figure 8 and Figure 9In the embodiment of the present application, the plug-in body 221 is used to be provided with a mounting hole 2211 on one side facing the mounting end a, the second plug-in column 222b has a first plug-in end c and a second plug-in end d which are arranged opposite to each other, the first plug-in end c is inserted into the mounting hole 2211, the second plug-in end d is used to be inserted into the second plug-in hole 201b, a first annular boss 2221 is convexly provided in the middle of the side wall surface of the second plug-in column 222b, and a second annular boss 2222 is convexly provided on the side of the first plug-in end c of the second plug-in column 222b, so that a fitting space e is formed between the first annular boss 2221 and the second annular boss 2222, and the second The plug-in structure 22 also includes a sleeve 223 and a compression spring 224, and the sleeve 223 and the compression spring 224 are both mounted on the second plug-in column 222b and located in the mounting space e. The sleeve 223 is arranged adjacent to the first plug-in end c, and the end of the sleeve 223 is used to abut against the periphery of the mounting hole 2211. Such an arrangement facilitates the disassembly and assembly of the second plug-in structure 22, and under the action of the compression spring 224, there is always a pressure on the second plug-in column 222b in the direction from the first plug-in end c to the second plug-in end d, so that the second plug-in column 222b will not fall off the tank cover 200 during operation, thereby improving the installation effect.

[0056] Specifically, refer to Figure 3 In the embodiment of the present application, the second abutment portion 21 includes the compression spring 224. When the fuel tank cover 200 covers the fuel filling port 300, the side of the compression spring 224 will abut against the first abutment portion 11 which is arranged in a block shape. At the same time, the compression spring 224 has a buffering effect to reduce noise with good effect. Of course, in other embodiments, the second abutment portion 21 can also be arranged as an elastic block installed on the second plug-in column 222b or as an elastic block installed on the plug-in body 221. There are many structures of the second abutment portion 21, which can be a block structure or a columnar structure, and the present application does not limit this.

[0057] Further, refer to Figure 3 In the embodiment of the present application, the first abutting portion 11 is configured as a block structure extending in the left-right direction, and the second abutting portion 21 includes the compression spring 224. The configuration is such that when the tank cap 200 covers the fuel filler port 300, the distance between the tank cap 200 and the side surrounding surface is set to L, wherein 15 mm ≤ L ≤ 20 mm, thereby avoiding collision between the tank cap 200 and the periphery of the fuel filler port 300, ensuring the spraying effect, and realizing protection of the paint on the inner side of the tank cap 200 and the paint on the periphery of the fuel filler port 300.

[0058] Specifically, referring to Figure 9 , a stepped portion is provided on the side of the second insertion end d of the second insertion post 222b, so as to form a stepped surface f facing away from the first insertion end c. By making the stepped surface f abut against the periphery of the second insertion hole 201b, it is avoided that the second insertion post 222b is inserted too deeply into the second insertion hole 201b and collides with the bottom of the second insertion hole 201b, resulting in deformation or scratching of the outer side surface of the fuel tank cap 200.

[0059] Specifically, referring to Figure 8 and Figure 9 , the first insertion end c of the second insertion post 222b is provided with a reduction, so that the first insertion end c forms a guiding inclined surface, which is convenient for the first insertion end c to be inserted into the mounting hole 2211, with a simple structure and easy operation.

[0060] Specifically, taking the first insertion structure 12 including two first insertion posts 122a and one second insertion post 122b, and the second insertion structure 22 including two first insertion posts 222a and one second insertion post 222b as an example, the installation and disassembly of the automobile fuel tank cap spraying auxiliary device 100 are described:

[0061] When it is necessary to install the automobile fuel tank cap spraying auxiliary device 100, open the fuel tank cap 200 by hand; hold the middle part of the plugging main body 221 by hand, and insert the two first plugging posts 222a into the two first plugging holes 201a respectively. Although there are slight paint quality problems of poor paint atomization within 1 mm around the two first plugging holes 201a, there is electrophoretic paint at this place, so rusting will not occur, and there is also an interior shield to cover this place, which is within the range allowed by the process quality regulations; hold the middle part of the second plugging post 122b by hand, approach the opened fuel tank cap 200, and take a posture of 45° inclination, with the end corresponding to the plugging main body 221 inclined downward, and insert the first plugging end c of the second plugging post 122b into the mounting hole 2211 of the plugging main body 221. Slightly exert force to overcome the elastic force of the compression spring 224 so that the second plugging post 222b can be further inserted into the mounting hole 2211 of the plugging main body 221. Then press down the second plugging end d of the second plugging post 222b to a horizontal posture so that the second plugging end d of the second plugging post 222b is aligned with the second plugging hole 201b on the fuel tank cap 200. Then release the elastic force of the compression spring 224 so that the second plugging end d of the second plugging post 222b is inserted into the second plugging hole 201b of the fuel tank cap 200. Due to the existence of the spring force of the compression spring 224, the second plugging post 222b will always be stuck between the mounting hole 2211 of the plugging main body 221 and the second plugging hole 201b of the fuel tank cap 200 and will not fall off. Since there is also electrophoretic paint in the process hole of the second plugging hole 201b of the fuel tank cap 200, rusting will not occur, and there is also an interior shield to cover this place, which is within the range allowed by the process quality regulations; hold the plugging main body 121 by hand, first insert the two first plugging posts 122a into the two first plugging holes 301a respectively, and then insert the second plugging post 122b into the second plugging hole 301b; gently push the lower edge of the rear part of the fuel tank cap 200 by hand, and the fuel tank cap 200 automatically closes under the elastic force of its own spring, and the installation operation is completed.

[0062] When it is necessary to disassemble the automobile fuel tank cap spraying auxiliary device 100, open the fuel tank cap 200 by hand, hold the insertion main body 121 with hand and lift it upward to pull out the second insertion column 122b, and then move it forward to pull out the two first insertion columns 122a from the corresponding two first insertion holes 301a respectively; hold the middle part of the second insertion column 222b with hand and slightly overcome the elastic force of the compression spring 224 so that the first insertion end c of the second insertion column 222b can be further inserted into the installation hole 2211, and at the same time make the second insertion end d of the second insertion column 222b can be disengaged from the second insertion hole 201b of the fuel tank cap 200, then lift the second insertion end d of the second insertion column 222b to make the second insertion column 222b reach an angle of more than 45° (to prevent the second insertion end d of the second insertion column 222b from bumping against the fuel tank cap 200 when the compression spring 224 is released, thus forming a quality problem of paint bumping injury), and then release the compression spring 224, and the second insertion column 222b can be taken down. Hold the middle part of the insertion main body 221 in the length direction, first disengage the lower first insertion column 222a from the corresponding first insertion hole 201a, and then disengage the upper first insertion column 222a from the corresponding first insertion hole 201a. The disassembly operation is completed.

[0063] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An auxiliary device for spraying the fuel tank cap of an automobile, which is used to support between the fuel tank cap and the periphery of the fuel filler neck. The fuel tank cap has an installation end and a fastening end arranged opposite to each other. The installation end is rotatably installed on the periphery of the fuel filler neck, so that the fuel tank cap can move towards the fuel filler neck to cover the fuel filler neck or move away from the fuel filler neck to open the fuel filler neck. It is characterized in that, The auxiliary device for spraying the automobile fuel tank cap includes: A first support portion for being installed on the periphery of the fuel filling port, the first support portion including a first abutting portion; and, A second support portion for being installed inside the fuel tank cap, the second support portion including a second abutting portion, the second abutting portion being used for abutting against the first abutting portion when the fuel tank cap closes the fuel filling port; the second support portion includes a second insertion structure, the second insertion structure including an insertion main body and a plurality of insertion posts provided on the insertion main body, the plurality of insertion posts being used for being inserted into a plurality of second process holes inside the fuel tank cap; the second abutting portion is provided on the insertion main body or one of the plurality of insertion posts; Wherein, the plurality of second process holes include a first insertion hole provided adjacent to the fastening end and a second insertion hole provided adjacent to the installation end, the first insertion hole extends along the thickness direction of the fuel tank cap, and the second insertion hole extends along the direction from the installation end to the fastening end; The plurality of insertion posts include a first insertion post and a second insertion post, the first insertion post is used for being inserted into the first insertion hole, and the second insertion post is used for being inserted into the second insertion hole; an installation hole is provided on a side surface of the insertion main body facing the installation end; the second insertion post has a first insertion end and a second insertion end which are oppositely arranged, the first insertion end is inserted into the installation hole, and the second insertion end is used for being inserted into the second insertion hole, a first annular boss protrudes from the middle of the side wall surface of the second insertion post, and a second annular boss protrudes from the side portion of the first insertion end of the second insertion post, so that a sleeving space is formed between the first annular boss and the second annular boss; The second insertion structure further includes a sleeve and a compression spring, both the sleeve and the compression spring are sleeved on the second insertion post and are located in the sleeving space, the sleeve is provided adjacent to the first insertion end, and an end of the sleeve is used for abutting against the periphery of the installation hole.

2. The spraying auxiliary device for an automobile fuel tank cap according to claim 1, characterized in that, The first support portion includes a first insertion structure, the first insertion structure including an insertion main body and a plurality of insertion posts provided on the insertion main body, the plurality of insertion posts being used for being inserted into a plurality of first process holes on the periphery of the fuel filling port; The first abutting portion is provided on the insertion main body.

3. The spraying auxiliary device for an automobile fuel tank cap according to claim 2, characterized in that, The fuel tank cap is rotatably installed on the periphery of the fuel filling port along the up-down axis; The plurality of first process holes include a first insertion hole and a second insertion hole which are arranged at intervals along the periphery of the fuel filling port, the first insertion hole extends along the front-back direction, and the second insertion hole extends along the up-down direction; The plurality of insertion posts include a first insertion post and a second insertion post, the first insertion post extends along the front-back direction and is used for being inserted into the first insertion hole, and the second insertion post extends along the up-down direction and is used for being inserted into the second insertion hole.

4. The spraying auxiliary device for an automobile fuel tank cap according to claim 3, characterized in that, Two first insertion holes are provided, and the two first insertion holes are spaced apart along the up-down direction; Two first insertion posts are provided, and the two first insertion posts are respectively inserted into the two first insertion holes.

5. The spraying auxiliary device for an automobile fuel tank cap according to claim 1, wherein, There are two of the first insertion holes, and the two first insertion holes are arranged at intervals in the up-and-down direction; There are two of the first insertion posts, and the two first insertion posts are respectively used for being inserted into the two first insertion holes.

6. The spraying auxiliary device for an automobile fuel tank cap according to claim 1, wherein, The side part of the second insertion end of the second insertion post is provided with a step to form a step surface arranged away from the first insertion end, and the step surface is used for abutting against the periphery of the second insertion hole.

7. The spraying auxiliary device for an automobile fuel tank cap according to claim 1, wherein, The first insertion end of the second insertion post is provided with a reduction.

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