A fuel filler cap with improved safety performance

Abstract

A fuel filler cap with improved safety performance includes a large cover, a gear plate, and a sealing assembly. The lower end of the large cover and the upper end of the gear plate are connected by a snap, and the lower end of the gear plate and the upper end of the sealing assembly are connected by press fitting. A ratchet is provided between the lower end face of the large cover and the gear plate, and a torsion spring is fixedly installed at the center between the lower end face of the large cover and the gear plate. The sealing assembly includes a valve body assembly and a sealing ring. The sealing ring is provided on the outer side of the upper part of the valve body assembly, and when sealing, the valve body assembly and the sealing ring are lower than the position of the fuel pipe head of the fuel pipe. The fuel filler cap with improved safety performance described in the present invention has a reasonable structural design and a separation protection function. It will not be damaged after a collision and can continue to be used after reassembly. The overall size of the fuel filler cap is smaller than before, and the sealing component is hidden in the fuel pipe, which avoids secondary collisions, improves safety performance, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of fuel filler caps, and in particular to a fuel filler cap with improved safety performance. Background Art

[0002] With the continuous progress of human society, cars are increasingly entering people's lives. China has become the world's largest automobile producer and the largest automobile consumer. With the continuous increase in the number of cars, the frequency of traffic accidents is also increasing, and driving safety is receiving more and more attention. As an indispensable component in the fuel system, the fuel filler cap is constantly facing challenges from major OEMs and many consumers in terms of reliability and safety. The fuel filler cap refers to the cap used for sealing the fuel pipe of the automobile tank. When refueling, open the fuel filler cap and insert the fuel gun into the fuel pipe.

[0003] The working principle of the design of the fuel filler cap in the prior art is generally as follows: the user grabs the handle of the large cover with his hand and rotates it clockwise, the large cover drives the ratchet to rotate clockwise, and the ratchet drives the valve body to rotate; the valve body rotates clockwise along the thread direction of the oil pipe head and produces a downward movement, so that the valve body compresses the sealing ring, and the sealing ring will seal the gap between the valve body and the oil pipe head after being compressed, so that the inside of the fuel pipe is in a sealed state. The above-mentioned design of the fuel filler cap is prone to rupture when it is subjected to severe impact, which makes it difficult for the fuel filler cap to seal the fuel pipe, fuel leakage, and huge safety risks. In addition, the fuel filler cap in the prior art is large in size, and the height of the sealing surface from the handle is high, which is difficult to arrange on the vehicle body. When encountering difficulties in arrangement, it is often necessary to lower the height of the handle, and the reduction of the height of the handle affects the user's feel, and the sealing component of the fuel filler cap is higher than the head of the fuel pipe, which has the risk of secondary collision.

[0004] Therefore, it is necessary to develop a fuel filler cap with improved safety performance, which makes up for the shortcomings of the fuel filler cap in the prior art and improves the safety performance of the fuel filler cap.

[0005] Chinese patent application number CN102529701A discloses a single-action torque-controlled sealed fuel tank cap for automobiles. Through the setting of a handle limit block, a valve body limit block and a torsion spring, the user is given an intuitive handle rebound information to confirm that the product has been installed in place, avoiding time-consuming and laborious repetitive operations, but without improving the safety performance of the fuel tank cap. Summary of the invention

[0006] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a fuel filler cap with improved safety performance, reasonable structural design, and separation protection function. It will not be damaged after a collision and can continue to be used after reassembly. The overall size of the fuel filler cap is smaller than before, and the sealing component is hidden in the fuel pipe, which avoids secondary collisions, improves safety performance, and has broad application prospects.

[0007] Technical solution: A fuel filler cap with improved safety performance, comprising a large cover, a gear plate, and a sealing assembly, wherein the lower end of the large cover and the upper end of the gear plate are connected by a snap, and the lower end of the gear plate and the upper end of the sealing assembly are connected by press-fitting; a ratchet is provided between the lower end surface of the large cover and the gear plate, and a torsion spring is fixedly installed at the center between the lower end surface of the large cover and the gear plate; the sealing assembly comprises a valve body assembly and a sealing ring, wherein the sealing ring is provided on the outer side of the upper part of the valve body assembly and when sealing, the valve body assembly and the sealing ring are both lower than the position of the oil pipe head of the fuel filler pipe.

[0008] The fuel filler cap with improved safety performance described in the present invention has a reasonable structural design and is easy to use. When a user rotates the large cover, the large cover drives the ratchet to rotate, thereby driving the gear plate to rotate. The power transmission between the large cover and the gear plate includes but is not limited to connecting structures such as toothed plate transmission. The rotation of the gear plate drives the rotation of the sealing assembly and generates downward movement at the same time, so that the sealing assembly is screwed into the oil pipe head, thereby achieving sealing. When the sealing assembly is screwed into the oil pipe head, it is completely protected in the oil pipe head.

[0009] The fuel filler cap described in the present invention is different from the combination of a large cover and a valve body in the prior art. The original integrated design of the valve body is changed into an assembled design, and the lower end of the gear plate and the upper end of the sealing assembly are connected by press-fitting. This can not only reduce the height of the overall product and facilitate the arrangement of the product on the vehicle, but also play a role of separation and protection. When the fuel filler cap is hit, the partial separation of the gear plate and the sealing assembly plays a protective and buffering role. The gear plate and the sealing assembly are not completely destroyed, and the gear plate and the sealing assembly can still be used after being reassembled.

[0010] In the prior art fuel filler cap, the distance from the top of the large cover to the fuel filler pipe is generally about 32.5 mm or more. The fuel filler cap of the present invention reduces the distance from the top of the large cover to the fuel filler pipe to 25 mm after assembly, reducing the height by at least 7.5 mm, which is convenient for vehicle body layout.

[0011] When sealing, the valve body assembly and the sealing ring are both lower than the position of the oil pipe head, that is, when the sealing assembly is screwed into the oil pipe head, the sealing assembly is completely protected inside the oil pipe head. When the fuel filler cap is collided, the sealing assembly is completely protected inside the oil pipe head. The oil pipe head is a metal part and can effectively protect the sealing assembly of the fuel filler cap, reducing the risk of secondary collision.

[0012] Furthermore, in the above-mentioned fuel filler cap with improved safety performance, the valve body assembly also includes a valve body, a spring retainer, a pressure spring, a sealing gasket support plate, a sealing gasket, a vacuum valve core, and a vacuum spring. The spring retainer, pressure spring, sealing gasket support plate, sealing gasket, vacuum valve core, and vacuum spring are assembled together in sequence from top to bottom and then installed inside the valve body.

[0013] Furthermore, in the above-mentioned fuel filler cap with improved safety performance, a circle of disc-shaped structure is provided at the lower end of the gear plate, and an inverted structure is provided at the upper end of the sealing assembly, and the inner diameter of the inverted structure at the upper end of the sealing assembly is smaller than the outer diameter of the disc-shaped structure at the lower end of the gear plate.

[0014] The structural design of the gear plate and the sealing assembly and the inner diameter of the undercut structure at the upper end of the sealing assembly are smaller than the outer diameter of the disc-shaped structure at the lower end of the gear plate. After being pressed, the gear plate will be firmly stuck on the sealing assembly and has good stability.

[0015] Furthermore, in the above-mentioned fuel filler cap with improved safety performance, a handle is provided on the upper end surface of the large cover.

[0016] The user grasps the handle of the large cover with his hand to perform a rotating operation.

[0017] Furthermore, in the above-mentioned fuel filler cap with improved safety performance, a circle of serrations is provided on the inner circumference of the lower end surface of the large cover, a corresponding circle of serrations is also provided on the upper end surface of the gear plate, and a ratchet is provided between the serrations of the large cover and the serrations of the gear plate.

[0018] Furthermore, in the above-mentioned fuel filler cap with improved safety performance, a fixing ring is vertically arranged at the center of the upper end surface of the gear plate, a torsion spring slot is arranged in the fixing ring and a torsion spring slot is also arranged on the corresponding lower end surface of the large cover, and the two ends of the torsion spring are respectively embedded in the torsion spring slots.

[0019] The beneficial effects of the present invention are:

[0020] (1) The fuel filler cap with improved safety performance described in the present invention has a reasonable structural design. It is different from the combination of a large cover and a valve body in the prior art. The original integrated valve body design is changed into an assembled design. The lower end of the gear plate and the upper end of the sealing assembly are connected by press fitting, which can not only reduce the height of the overall product and facilitate the arrangement of the product on the vehicle, but also play a role of separation and protection. When the fuel filler cap is hit, the partial separation of the gear plate and the sealing assembly plays a protective and buffering role. The gear plate and the sealing assembly are not completely destroyed, and the gear plate and the sealing assembly can still be used after being reassembled;

[0021] (2) The fuel filler cap with improved safety performance of the present invention has a height reduction of at least 7.5 mm from the top of the large cap to the fuel filler pipe after assembly, compared with the conventional fuel filler cap, which generally has a height reduction of about 32.5 mm or more from the top of the large cap to the fuel filler pipe, which is convenient for vehicle body layout;

[0022] (3) In the fuel filler cap with improved safety performance described in the present invention, the valve body assembly and the sealing ring are both lower than the position of the oil pipe head when sealing, that is, when the sealing assembly is screwed into the oil pipe head, the sealing assembly is completely protected inside the oil pipe head. When the fuel filler cap is hit, the sealing assembly is completely protected inside the oil pipe head. The oil pipe head is a metal part, which can effectively protect the sealing assembly of the fuel filler cap, thereby reducing the risk of secondary collision.

[0023] (4) The fuel filler cap with improved safety performance described in the present invention has a structural design of the gear plate and the sealing assembly, and the inner diameter of the undercut structure at the upper end of the sealing assembly is smaller than the outer diameter of the disc-shaped structure at the lower end of the gear plate. After being pressed, the gear plate will be firmly stuck on the sealing assembly, and has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall cross-section of the fuel filler cap with improved safety performance according to the present invention Figure 1 ;

[0025] Figure 2 The overall cross-section of the fuel filler cap with improved safety performance according to the present invention Figure 2 ;

[0026] Figure 3 A partial cross-sectional view of the fuel filler cap with improved safety performance according to the present invention;

[0027] Figure 4 Schematic diagram of the partial connection between the large cover and the gear plate of the fuel filler cap for improving safety performance according to the present invention Figure 1 ;

[0028] Figure 5 Schematic diagram of the partial connection between the large cover and the gear plate of the fuel filler cap for improving safety performance according to the present invention Figure 2 ;

[0029] Figure 6 A partial connection diagram of the fuel filler cap with improved safety performance according to the present invention;

[0030] Figure 7 A schematic diagram of the overall structure of the fuel filler cap with improved safety performance according to the present invention;

[0031] In the figure: large cover 1, buckle 11, handle 12, gear plate 2, fixing ring 21, sealing assembly 3, valve body assembly 31, valve body 311, spring retainer 312, pressure spring 313, sealing gasket support plate 314, sealing gasket 315, vacuum valve core 316, vacuum spring 317, sealing ring 32, ratchet 4, torsion spring 5, refueling pipe 6, oil pipe head 61, ring-disc structure a, inverted structure b, serration c, distance d from the top of the refueling cap to the refueling pipe, position e of the refueling door on the vehicle body, position f of the handle and the refueling door. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-7 And specific examples further illustrate the present invention.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] like Figure 1-7 The fuel filler cap with improved safety performance of the above-mentioned structure shown in the figure includes a large cover 1, a gear plate 2, and a sealing assembly 3. The lower end of the large cover 1 and the upper end of the gear plate 2 are connected by a buckle 11, and the lower end of the gear plate 2 and the upper end of the sealing assembly 3 are connected by press-fitting. A ratchet 4 is provided between the lower end surface of the large cover 1 and the gear plate 2, and a torsion spring 5 is fixedly installed at the center between the lower end surface of the large cover 1 and the gear plate 2. The sealing assembly 3 includes a valve body assembly 31 and a sealing ring 32. The sealing ring 32 is arranged on the outer side of the upper part of the valve body assembly 31, and when sealing, the valve body assembly 31 and the sealing ring 32 are both lower than the position of the oil pipe head 61 of the fuel filler pipe 6.

[0035] In addition, the valve body assembly 31 also includes a valve body 311, a spring retainer 312, a pressure spring 313, a sealing gasket support plate 314, a sealing gasket 315, a vacuum valve core 316, and a vacuum spring 317. The spring retainer 312, the pressure spring 313, the sealing gasket support plate 314, the sealing gasket 315, the vacuum valve core 316, and the vacuum spring 317 are assembled together in sequence from top to bottom and then installed inside the valve body 311.

[0036] In addition, a circle of disc-shaped structure a is provided at the lower end of the gear plate 2, and an undercut structure b is provided at the upper end of the sealing component 3. The inner diameter of the undercut structure b at the upper end of the sealing component 3 is smaller than the outer diameter of the disc-shaped structure a at the lower end of the gear plate 2.

[0037] In addition, a handle 12 is provided on the upper end surface of the large cover 1 .

[0038] Furthermore, a circle of saw teeth c is provided on the inner circumference of the lower end surface of the large cover 1, and a corresponding circle of saw teeth c is also provided on the upper end surface of the gear plate 2. A ratchet 4 is provided between the saw teeth c of the large cover 1 and the saw teeth c of the gear plate 2.

[0039] In addition, a fixing ring 21 is vertically arranged at the center of the upper end surface of the gear plate 2, a torsion spring slot is arranged in the fixing ring 21 and a torsion spring slot is also arranged on the corresponding lower end surface of the large cover 1, and both ends of the torsion spring 5 are respectively embedded in the torsion spring slots. Example

[0040] Based on the above structural foundation, such as Figures 1 to 7 shown.

[0041] The fuel filler cap with improved safety performance described in the present invention has a reasonable structural design and is easy to use. The user grasps the handle 12 of the large cover 1 by hand to rotate it. The large cover 1 drives the ratchet 4 to rotate, thereby driving the gear plate 2 to rotate. The power transmission between the large cover 1 and the gear plate 2 includes but is not limited to connecting structures such as toothed plate transmission. The rotation of the gear plate 2 drives the rotation of the sealing component 3 and generates a downward movement at the same time, so that the sealing component 3 is screwed into the oil pipe head 3, thereby achieving sealing. When the sealing component 3 is screwed into the oil pipe head 61, it is completely protected in the oil pipe head 61.

[0042] The fuel filler cap described in the present invention is different from the combination of a large cover and a valve body in the prior art. The original integrated valve body design is changed into an assembled design, and the lower end of the gear plate 2 and the upper end of the sealing assembly 3 are connected by press-fitting, which can not only reduce the height of the overall product and facilitate the arrangement of the product on the vehicle, but also play a role of separation and protection. When the fuel filler cap is hit, the partial separation of the gear plate 2 and the sealing assembly 3 plays a protective and buffering role. The gear plate 2 and the sealing assembly 3 are not completely destroyed, and the gear plate 2 and the sealing assembly 3 can still be used after being reassembled.

[0043] In the prior art fuel filler cap, the distance from the top of the large cover 1 to the fuel filler pipe 6 is generally about 32.5 mm or more. The fuel filler cap of the present invention has a distance d from the top of the large cover 1 to the fuel filler pipe 6 of 25 mm after assembly, which reduces the height by at least 7.5 mm, making it easier to arrange the vehicle body.

[0044] When sealing, the valve body assembly 31 and the sealing ring 32 are both lower than the position of the oil pipe head 61, that is, when the sealing assembly 3 is screwed into the oil pipe head 61, the sealing assembly 3 is completely protected in the oil pipe head 61. When the fuel filler cap is hit, the sealing assembly 3 is completely protected inside the oil pipe head 61. The oil pipe head 61 is a metal part and can effectively protect the sealing assembly 3 of the fuel filler cap, thereby reducing the risk of secondary collision.

[0045] Furthermore, the valve body assembly 31 is obtained by assembling the spring retainer 312 , the pressure spring 313 , the sealing gasket support plate 314 , the sealing gasket 315 , the vacuum valve core 316 , and the vacuum spring 317 in sequence from top to bottom and then installing them inside the valve body 311 .

[0046] Furthermore, the structural design of the gear plate 2 and the sealing assembly 3 and the inner diameter of the undercut structure b at the upper end of the sealing assembly 3 are smaller than the outer diameter of the disc-shaped structure a at the lower end of the gear plate 2. After being pressed, the gear plate 2 will be firmly stuck on the sealing assembly 3 and has good stability.

[0047] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0049] In addition, the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A fuel filler cap with improved safety performance, characterized in that: The invention comprises a large cover (1), a gear plate (2), and a sealing assembly (3); the lower end of the large cover (1) and the upper end of the gear plate (2) are connected by a buckle (11); the lower end of the gear plate (2) and the upper end of the sealing assembly (3) are connected by a press-fitting method; a ratchet (4) is arranged between the lower end surface of the large cover (1) and the gear plate (2); a torsion spring (5) is fixedly installed at the center between the lower end surface of the large cover (1) and the gear plate (2); the sealing assembly (3) comprises a valve body assembly (31) and a sealing ring (32); the sealing ring (32) is arranged on the valve body assembly ( 31) and when sealed, the valve body assembly (31) and the sealing ring (32) are both lower than the position of the oil pipe head (61) of the oil filling pipe (6); a circle of disc-shaped structure is provided at the lower end of the gear plate (2), and an undercut structure is provided at the upper end of the sealing assembly (3); the inner diameter of the undercut structure at the upper end of the sealing assembly (3) is smaller than the outer diameter of the disc-shaped structure at the lower end of the gear plate (2); a circle of saw teeth is provided on the inner circumference of the lower end surface of the large cover (1), and a corresponding circle of saw teeth is also provided on the upper end surface of the gear plate (2); a ratchet (4) is provided between the saw teeth of the large cover (1) and the saw teeth of the gear plate (2).

2. The fuel filler cap with improved safety performance according to claim 1, characterized in that: The valve body assembly (31) further comprises a valve body (311), a spring retainer (312), a pressure spring (313), a sealing gasket support plate (314), a sealing gasket (315), a vacuum valve core (316), and a vacuum spring (317); the spring retainer (312), the pressure spring (313), the sealing gasket support plate (314), the sealing gasket (315), the vacuum valve core (316), and the vacuum spring (317) are assembled together in sequence from top to bottom and then installed inside the valve body (311).

3. The fuel filler cap with improved safety performance according to claim 1, characterized in that: The upper end surface of the large cover (1) is provided with a handle (12).

4. The fuel filler cap with improved safety performance according to claim 1, characterized in that: A fixing ring (21) is vertically arranged at the center of the upper end surface of the gear plate (2), a torsion spring slot is arranged in the fixing ring (21), and a torsion spring slot is also arranged on the corresponding lower end surface of the large cover (1), and the two ends of the torsion spring (5) are respectively embedded in the torsion spring slots.

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