Sealing structure of small refueling door of automobile, small refueling door assembly and automobile

Abstract

The utility model provides an automobile refueling door sealing structure, a refueling door assembly and an automobile, which comprises a refueling port box assembly and a lower sheet metal part, the refueling port box assembly is arranged above the lower sheet metal part, the bottom of the refueling port box assembly is provided with a first through hole for an oil supply pipe to pass through, the sealing structure further comprises an elastic sealing piece, and the elastic sealing piece is arranged on the lower sheet metal part. The elastic sealing piece is arranged on the lower metal plate in an interference mode, a second through hole for an oil pipe to penetrate through is formed in the elastic sealing piece, the oil pipe sequentially penetrates through the first through hole and the second through hole, and the first through hole and the second through hole are both in interference fit with the oil pipe. The elastic sealing piece and the oil filling port box assembly are arranged in a split mode, the elastic sealing piece is in interference fit with the lower sheet metal part, and the oil filling port box assembly is in interference fit with the oil pipe, so that on one hand, the installation difficulty of the small oil filling door is effectively reduced, and on the other hand, external water vapor, tiny dust particles and the like can be effectively prevented from entering.

Description

Technical Field

[0001] This utility model relates to the field of automotive fuel filler port technology, and in particular to a sealing structure for an automotive fuel filler port, a fuel filler port assembly, and an automotive. Background Technology

[0002] With the automotive industry's increasing demands for lightweighting, intelligentization, and sealing performance, the fuel filler door, as a crucial functional component of the vehicle body, has seen its sealing structure's reliability and assembly convenience become core areas for technological improvement. Fuel filler doors are widely used in gasoline-powered vehicles and hybrid vehicles; maintaining consistency between the fuel filler door and the vehicle body ensures an aesthetically pleasing appearance.

[0003] In existing technologies, a sealing element is typically added between the fuel filler neck and the body sheet metal to ensure a seal. This sealing element is often integrally molded with the fuel filler cap, which reduces the number of parts but leads to small installation tolerances and assembly difficulties. When there are manufacturing tolerances in the body sheet metal holes, rigid sealing elements cannot compensate for deviations through elastic deformation, easily causing poor sealing or stress concentration during installation, resulting in fatigue cracking after long-term use. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, this utility model provides a sealing structure for a car fuel filler door, a fuel filler door assembly, and a car, the purpose of which is to reduce the difficulty of installing the fuel filler door.

[0005] This utility model proposes a sealing structure for a car fuel filler door, including a fuel filler box assembly and a lower sheet metal part. The fuel filler box assembly is disposed above the lower sheet metal part. A first through hole for a fuel supply pipe is opened at the bottom of the fuel filler box assembly. The sealing structure also includes an elastic sealing element, which is interference-fitted onto the lower sheet metal part. A second through hole for a fuel supply pipe is opened on the elastic sealing element. The fuel supply pipe passes through the first through hole and the second through hole in sequence, and both the first through hole and the second through hole are interference-fitted with the fuel supply pipe.

[0006] Preferably, the elastic seal has a third through hole through which the drain pipe passes, and the third through hole is interference-fitted with the drain pipe.

[0007] Preferably, the elastic seal is provided with an adjustment part for adjusting the angle of the elastic seal and a positioning part for interference fit with the lower sheet metal part. The adjustment part and the positioning part work together to achieve adaptive installation and dynamic stability of the elastic seal.

[0008] Preferably, the filler cap assembly includes a housing and a connecting part, the connecting part being fixed to the bottom of the housing by secondary injection molding, and the first through hole being disposed at the bottom of the connecting part.

[0009] Preferably, the hardness of the connecting part is less than that of the housing.

[0010] Preferably, the elastic seal is made of EPDM rubber.

[0011] Another aspect of this utility model provides an automotive fuel filler door assembly, including the sealing structure described above. The fuel filler door assembly includes a housing, a rotating shaft, a cover plate, a drive gear, a damping gear, and a spring. The rotating shaft is fixedly connected to the cover plate. One end of the rotating shaft is provided with a drive gear. A spring for rotating the drive gear is sleeved on the rotating shaft. The drive gear meshes with the damping gear provided on the housing.

[0012] Preferably, the drive gear includes a gear disk and a first support portion, the gear disk is fixed on the rotating shaft, and the first support portion is fixed on the gear disk; one end of the spring abuts against the first support portion, and the other end of the spring abuts against a second support portion on the housing.

[0013] Preferably, the damping gear is detachably mounted on the housing.

[0014] This utility model also provides an automobile, including the sealing structure described above.

[0015] As described above, the sealing structure of the fuel filler door, the fuel filler door assembly, and the automobile involved in this utility model have the following beneficial effects:

[0016] This utility model separates the elastic seal and the fuel filler box assembly. The elastic seal is interference-fitted with the lower sheet metal part, and the fuel filler box assembly is interference-fitted with the oil pipe. On the one hand, this effectively reduces the installation difficulty of the fuel filler door, and on the other hand, it effectively prevents external moisture, fine dust particles, etc. from entering.

[0017] This invention provides an adjustment part and a positioning part on the elastic seal, and the installation angle of the elastic seal is adjusted by the coordinated adjustment part and the positioning part.

[0018] This invention controls the opening speed of the cover plate by using a drive gear and a damping gear, avoiding impact caused by the rapid opening and closing of the refueling door and improving the user experience. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of the sealing structure of a car refueling valve provided in an embodiment of the present invention.

[0020] Figure 2 A three-dimensional assembly schematic diagram of the sealing structure of a car refueling valve provided in an embodiment of this utility model.

[0021] Figure 3This is a schematic diagram of the sealing structure of a car refueling valve according to an embodiment of the present invention.

[0022] Figure 4 This is a three-dimensional assembly diagram of a car fuel filler door assembly provided in an embodiment of the present invention.

[0023] Figure 5 This is an assembly diagram showing the opening and closing of the cover of a car fuel filler door assembly according to an embodiment of the present invention.

[0024] Figure 6 for Figure 5 A magnified view of a portion of the image (I).

[0025] Figure 7 An exploded view of a car refueling gate assembly provided in an embodiment of the utility model.

[0026] Figure 8 This is a schematic diagram showing the cover plate in the locked state.

[0027] Figure 9 This is a diagram showing the cover in the unlocked state.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Filler cap assembly; 110. First through hole; 120. Housing; 121. Second support part; 130. Connecting part; 140. Rotating shaft; 150. Cover plate; 160. Drive gear; 161. Gear plate; 162. First support part; 170. Damping gear; 180. Spring; 200. Lower sheet metal part; 300. Oil pipe; 400. Elastic seal; 410. Second through hole; 420. Third through hole; 430. Adjustment part; 440. Positioning part; 500. Upper sheet metal part; 600. Actuator. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0032] like Figures 1 to 3 As shown, this utility model provides an embodiment of a sealing structure for a car fuel filler door, including a fuel filler box assembly 100, a lower sheet metal part 200, and an elastic sealing member 400. The fuel filler box assembly 100 is engaged with an upper sheet metal part 500 near its top, and is positioned above the lower sheet metal part 200. The bottom of the fuel filler box assembly 100 has a first through hole 110 through which a fuel supply pipe 300 passes. The elastic sealing member 400 is mounted on the lower sheet metal part 200 by an interference fit assembly method, which includes, but is not limited to, a snap-fit ​​type. The elastic seal 400 has a second through hole 410 through which the oil pipe 300 passes. The oil pipe 300 passes through the first through hole 110 and the second through hole 410 sequentially from top to bottom. The opening of the oil pipe 300 is located inside the filler cap assembly 100. Both the first through hole 110 and the second through hole 410 are interference-fitted with the oil pipe 300. The oil pipe 300 forms an interference seal with the walls of the first through hole 110 and the second through hole 410, preventing external moisture or fine dust particles from entering. It also prevents the elastic seal 400 from shaking itself and can maintain the direction of the oil pipe without external force. It should be noted that the elastic seal 400 and the filler cap assembly 100 are separately installed. The elastic seal 400 is made of, but is not limited to, EPDM rubber material (i.e., ethylene propylene diene monomer rubber). During installation, the elastic seal 400 is interference-sealed with the body sheet metal and oil pipes. The elastic deformation of the elastic seal 400 during assembly increases the dimensional tolerance, reduces the installation difficulty, and facilitates subsequent maintenance and replacement.

[0033] In one embodiment, such as Figure 2 and Figure 3As shown, the elastic seal 400 is also provided with a third through hole 420 through which the water supply and drainage pipes pass. The third through hole 420 is press-fitted with the drainage pipe, so that the drainage pipe and the elastic seal 400 form an interference seal. Under the action of the elastic seal 400, the direction of the water pipe can be prevented from being maintained without external force.

[0034] In one embodiment, such as Figure 3 As shown, the elastic seal 400 is fixedly provided with an adjustment part 430 for adjusting the angle of the elastic seal and a positioning part 440 for interference fit with the lower sheet metal part 200. During installation, the operator can manually squeeze the adjustment part 430 to place the elastic seal 400 into the mounting groove on the lower sheet metal part 200. At this time, there is a gap between the positioning part 400 and the wall of the mounting groove. When the operator releases the squeezed adjustment part 430, the elastic seal 400 snaps onto the lower sheet metal part 200 under its own elasticity. The interference formed between the elastic seal 400 and the lower sheet metal part 200 achieves a sealing interference. If the position of the elastic seal 400 needs to be adjusted, the operator can squeeze the adjustment part 430 in the same way as in this embodiment to create a gap between the positioning part 440 and the sheet metal part 200. Through this gap, the operator can adjust the overall angle of the elastic seal 400 until the elastic seal 400 is in the predetermined position, ensuring the precise fit between the elastic seal 400 and the lower sheet metal part 200 and the oil pipe, and improving the sealing reliability.

[0035] In one embodiment, such as Figure 1 As shown, the filler cap assembly 100 includes a housing 120 and a connecting part 130. The connecting part 130 is fixed to the bottom of the housing 120 by secondary injection molding. A first through hole 110 is provided at the bottom of the connecting part 130. The hardness of the connecting part 130 is less than that of the housing 120, so that the housing 120 can provide structural strength and the connecting part 130 can cooperate with the oil pipe to achieve a sealing effect. Specifically, the housing 120 is not limited to PP material (polypropylene), and the connecting part 130 is preferably TPV material (thermoplastic vulcanizate). The housing 120 and the connecting part 130 are integrally molded by secondary injection molding. During use, it can be ensured that the connecting part 130 is easy to deform. The connecting part 130 and the oil pipe 300 adopt an interference fit, which can effectively achieve a seal and prevent external moisture or small dust particles from entering.

[0036] like Figures 1 to 9As shown, this utility model provides an embodiment of an automotive fuel filler gate assembly, including the sealing structure described in the above embodiment. The fuel filler gate assembly 100 includes a housing 120, a rotating shaft 140, a cover plate 150, a drive gear 160, a damping gear 170, and a spring 180. The cover plate 150 is pivotally connected to the housing 120 via the rotating shaft 140. One end of the rotating shaft 140 is provided with the drive gear 160, and the spring 180 is sleeved on the rotating shaft 140 to rotate the drive gear. One end of the spring 180 abuts against the housing 120, and the other end of the spring 180 abuts against the drive gear 160 to prevent the spring 180 from moving axially and falling off. The drive gear 160 meshes with the damping gear 170 provided on the housing 120. An actuator 600, preferably an LPP actuator, is provided on the housing 120 to control the opening and closing of the cover plate 150. The rotating shaft 140 is connected to the housing 120 by a key to ensure that the drive gear 160 drives the rotating shaft 140 and the cover plate 150 to rotate together under the action of the spring force.

[0037] During use, such as Figure 8 As shown, if it is necessary to close the cover 150, pressing down on the cover 150 causes the cover 150 to rotate, which in turn drives the drive gear 160 to rotate against the spring force of the spring 180 until the cover 150 rotates to the closed position. The locking head of the actuator 600 then rotates a predetermined angle to lock the cover 150. The oiling cover system then locks the actuator 600 via an electrical signal to prevent the cover 150 from opening when not in operation. Figure 9 As shown, if it is necessary to open the cover 150, when the cover 150 is closed, the compressed spring continuously applies force to the rotating shaft, and the elastic force of the spring 180 is transmitted to the cover 150 through the rotating shaft. The refueling cover system unlocks the cover 150 by rotating the lock head of the actuator 600 by a predetermined angle through an electrical signal. Under the action of the elastic force, the drive gear 160 rotates, which in turn drives the damping gear 170 to rotate, thus opening the cover 150. If it is necessary to adjust the opening speed of the cover 150, this can be achieved by replacing it with a different type of damping gear 170, while avoiding excessively rapid opening and closing of the cover 150 and thus improving the user experience.

[0038] In one embodiment, such as Figure 6 As shown, the drive gear 160 includes a gear disk 161 and a first support portion 162. The gear disk 161 is fixed to the rotating shaft 140, and the first support portion 162 is fixed to the gear disk 161. One end of the spring 180 abuts against the first support portion 162, and the other end of the spring 180 abuts against the second support portion 121 on the housing, causing the spring 180, the first support portion 162, and the gear disk 161 to detach axially. The gear disk 161 may include, but is not limited to, an arc-shaped gear disk; both the first support portion 162 and the second support portion 121 are preferably cantilevered.

[0039] When the actuator is in the unlocked state, one end of the compressed spring 180 applies elastic force to the first support 162, causing the first support 162 to drive the gear 161 to rotate. The gear 161 then drives the first support 162 to rotate away from the second support 121, thereby causing the rotating shaft 140 and the cover plate 150 to rotate together, so as to open the cover plate 150.

[0040] This utility model also provides an automobile, including the sealing structure described in the above embodiments.

[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A sealing structure of a refueling door of an automobile, comprising a filler neck assembly (100) and a lower panel (200), wherein the filler neck assembly (100) is arranged above the lower panel (200), and a first through hole (110) is formed in the bottom of the filler neck assembly (100) to allow a fuel pipe (300) to pass through, characterized in that, The sealing structure further comprises an elastic sealing piece (400) which is interference fitted on the lower metal sheet (200), a second through hole (410) is formed on the elastic sealing piece (400) for the oil pipe (300) to pass through, the oil pipe (300) passes through the first through hole (110) and the second through hole (410) in sequence, and the first through hole (110) and the second through hole (410) are interference fitted with the oil pipe (300).

2. The seal structure for a refueling door of an automobile according to claim 1, characterized by A third through hole (420) is formed on the elastic sealing piece (400) for the drain pipe to pass through, and the third through hole (420) is interference fitted with the drain pipe.

3. The seal structure for a refueling door of an automobile according to claim 1 or 2, characterized in that, The elastic sealing piece (400) is provided with an adjusting part (430) for adjusting the angle of the elastic sealing piece and a positioning part (440) for interference fitting with the lower metal sheet (200), and the adjusting part (430) and the positioning part (440) cooperatively realize self-adaptive installation and dynamic stability of the elastic sealing piece.

4. The seal structure for a refueling door of an automobile according to claim 1, characterized by The oil filler cap assembly (100) comprises a shell (120) and a connecting part (130), the connecting part (130) is fixedly arranged at the bottom of the shell (120) by secondary injection molding, and the first through hole (110) is arranged at the bottom of the connecting part (130).

5. The seal structure for a refueling door of an automobile according to claim 4, characterized by The hardness of the connecting part (130) is less than that of the shell (120).

6. The seal structure for a refueling door of an automobile according to claim 1, wherein The elastic sealing piece (400) is made of EPDM rubber.

7. A filler door assembly for a vehicle, comprising: The oil filler cap assembly (100) comprises a shell (120), a rotating shaft (140), a cover plate (150), a driving gear (160), a damping gear (170) and a spring (180), the cover plate (150) is pivotally connected to the shell (120) through the rotating shaft (140), one end of the rotating shaft (140) is provided with the driving gear (160), the spring (180) for rotating the driving gear is sleeved on the rotating shaft (140), and the driving gear (160) is engaged with the damping gear (170) arranged on the shell.

8. The automotive filler door assembly of claim 7, wherein, The driving gear (160) comprises a toothed disc (161) and a first supporting part (162), the toothed disc (161) is fixed on the rotating shaft (140), and the first supporting part (162) is fixedly arranged on the toothed disc (161); one end of the spring (180) abuts against the first supporting part (162), and the other end of the spring (180) abuts against a second supporting part (121) on the shell.

9. The automotive filler door assembly of claim 7 or 8, wherein, The damping gear (170) is detachably arranged on the shell (120).

10. An automobile characterized by comprising: The sealing structure as claimed in any one of claims 1-6. The sealing structure as claimed in any one of claims 1-6.

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