High-sealing oil tank cover

Abstract

The utility model relates to the related field of fuel tank caps, in particular to a high-sealing fuel tank cap which comprises a fuel tank cap body, a threaded connection column, a first sealing ring, an extension cover, a second sealing ring, a threaded groove, a screw rod, a rotating plate, a transmission block, a positioning rod, a spring, a fixing sleeve, an annular groove, a hollow sealing ring, a polytetrafluoroethylene coating and the like. The first sealing ring, the second sealing ring, the hollow sealing ring and the positioning rod are arranged, and the top, the inner ring and the outer side of the oil filling opening of the oil tank are sealed through the first sealing ring, the second sealing ring and the hollow sealing ring respectively, so that the oil filling opening is subjected to multiple sealing through the oil tank cover, the oil filling opening can be sealed more comprehensively, and the sealing effect is better; the positioning rod is matched with the positioning groove in the oil filling opening to further reinforce and fix the oil tank cover, so that the oil tank cover is prevented from loosening, the sealing performance of the oil tank cover is further improved, and the risk of oil leakage of the oil tank is reduced.

Description

Technical Field

[0001] The utility model relates to the field of fuel tank covers, in particular to a high-sealing fuel tank cover. Background Art

[0002] The fuel tank cap is the part of a car, motorcycle or other motor vehicle that seals the fuel tank opening, ensuring that the fuel does not leak. It is designed to prevent dust, moisture and other impurities from entering the tank while allowing the owner to easily open it to refuel when needed.

[0003] The existing publication number is: CN201951236U which provides a fuel tank cap with a simple structure. The sealing ring installed in the sealing groove not only eliminates the risk of oil leakage, but also facilitates the replacement of the sealing ring.

[0004] The fuel tank cap is only provided with a layer of seal, and the sealing of the fuel tank filling port is not comprehensive, resulting in poor sealing effect and a still high risk of oil leakage. In addition, the fuel tank cap and the fuel tank filling port are threadedly connected, and the threads may wear out after long-term use, which may easily cause the connection between the fuel tank cap and the fuel filling port to loosen, thereby affecting the sealing of the fuel tank cap. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a high-sealing fuel tank cover to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-sealing fuel tank cap, comprising a fuel tank cap body, a threaded connection column arranged at the middle of the bottom end surface of the fuel tank cap body, a first sealing ring is embedded in the bottom of the fuel tank cap body, the bottom edge of the fuel tank cap body extends downward to form an extension cover, and a threaded groove is opened in the middle of the top end surface of the fuel tank cap body, and a fixing sleeve is detachably installed on the threaded connection column;

[0007] The inner ring of the extension cover covers the first sealing ring, and the inner wall of the extension cover is pasted with a second sealing ring;

[0008] The thread groove extends downward to the inside of the threaded connection column, and a screw rod is threadedly installed in the thread groove;

[0009] The top of the screw is fixedly provided with a rotating plate, the outer bottom of the screw is a smooth truncated cone structure with a larger upper part and a smaller lower part, and the outer bottom of the screw is provided with a plurality of transmission blocks that fit therewith, the transmission blocks are movably connected with the inner side of the thread groove, and a positioning rod is installed at one end of the transmission block away from the screw, a spring is movably sleeved on the positioning rod, and the positioning rod movably penetrates the side surface of the threaded connection column, and the two ends of the spring are respectively connected to the outer end face of the transmission block and the inner wall of the thread groove;

[0010] The fixing sleeve is provided with an annular groove along the circumferential direction, and a hollow sealing ring protruding from the side surface of the fixing sleeve is installed in the annular groove.

[0011] Preferably, the inner ring of the second sealing ring is in the shape of an inclined surface that contracts inward from bottom to top.

[0012] Preferably, the inner bottom of the thread groove expands outward, the inner top of the thread groove is threadably connected to the screw rod, and the inner diameter of the bottom of the thread groove is greater than the outer diameter of the screw rod.

[0013] Preferably, the transmission blocks at the bottom of the screw are distributed in a ring shape with equal intervals.

[0014] Preferably, a plurality of vertical anti-skid grooves are provided on the side surface of the fuel tank cover body.

[0015] Preferably, the positioning rod is perpendicular to the side surface of the transmission block, and when the spring is in a natural state, the positioning rod is flush with the side surface of the threaded connection column.

[0016] Preferably, the vertical cross-section of the hollow sealing ring is an arc-shaped structure, and the outer surface of the hollow sealing ring is coated with a polytetrafluoroethylene coating.

[0017] Preferably, a distance is provided between the inner side of the hollow sealing ring and the vertical inner wall of the annular groove.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a first sealing ring, a second sealing ring, a hollow sealing ring and a positioning rod. The first sealing ring, the second sealing ring and the hollow sealing ring respectively seal the top, the inner ring and the outer side of the oil filling port of the fuel tank, so that the fuel tank cap provides multiple seals for the oil filling port and can seal the oil filling port more comprehensively, with better sealing effect. The positioning rod cooperates with the positioning groove in the oil filling port to further strengthen and fix the fuel tank cap, thereby preventing the fuel tank cap from loosening, further improving the sealing performance of the fuel tank cap and reducing the risk of oil leakage in the fuel tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the top view of the fuel tank cover body of the utility model;

[0022] Figure 3 This is a schematic diagram of the oil tank cover of the utility model when viewed from above;

[0023] Figure 4 It is a schematic diagram of the structure of the positioning rod of the utility model in a retracted state;

[0024] Figure 5 The utility model Figure 1 A schematic diagram of the enlarged structure in the middle.

[0025] Among them: fuel tank cap body -1, threaded connecting column -2, first sealing ring -3, extension cover -4, second sealing ring -5, threaded groove -6, screw -7, rotating plate -8, transmission block -9, positioning rod -10, spring -11, fixing sleeve -12, annular groove -13, hollow sealing ring -14, polytetrafluoroethylene coating -15. DETAILED DESCRIPTION

[0026] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0027] like Figure 1 and Figure 2 As shown, the utility model provides a high-sealing fuel tank cap, comprising a fuel tank cap body 1, a threaded connection column 2 arranged at the middle of the bottom end surface of the fuel tank cap body 1, the position of the fuel tank cap body 1 is fixed by threaded connection of the threaded connection column 2 with the inner side of the fuel tank filling port, and a first sealing ring 3 is embedded at the bottom of the fuel tank cap body 1 to improve the sealing performance of the fuel tank cap body 1 connected to the fuel tank filling port;

[0028] In this embodiment, a plurality of vertical anti-skid grooves are provided on the side surface of the fuel tank cap body 1 to reduce slipping when the fuel tank cap body 1 is rotated;

[0029] like Figures 1 to 5 As shown, in this embodiment, the bottom edge of the fuel tank cap body 1 extends downward to form an extension cover 4, and a thread groove 6 is vertically opened in the middle of the top surface of the fuel tank cap body 1, and a fixing sleeve 12 is locked and fixed on the outer upper end of the threaded connection column 2;

[0030] The inner ring of the extension cover 4 covers the first sealing ring 3, and the inner wall of the extension cover 4 is pasted with a second sealing ring 5, which is attached to the outer wall of the oil filling port of the oil tank through the second sealing ring 5 to provide a second layer of sealing protection for the oil filling port;

[0031] The thread groove 6 extends vertically downward to the inside of the threaded connection column 2, and a screw 7 is installed in the thread groove 6;

[0032] A rotating plate 8 of a T-shaped structure is fixedly provided on the top of the screw rod 7. The outer bottom of the screw rod 7 is a smooth truncated cone structure with a larger upper portion and a smaller lower portion. A plurality of transmission blocks 9 are provided on the outer bottom of the screw rod 7 to fit therewith. The arc-shaped transmission block 9 is movably connected to the inner side of the thread groove 6. The transmission block 9 can move horizontally in the thread groove 6 to drive the positioning rod 10 to move horizontally synchronously. A positioning rod 10 is installed at one end of the transmission block 9 away from the screw rod 7. A spring 11 is movably sleeved on the positioning rod 10. The positioning rod 10 moves horizontally and penetrates the side surface of the threaded connection column 2. The two ends of the spring 11 are respectively connected to the outer end surface of the transmission block 9 and the inner wall of the thread groove 6, so that the transmission block 9 and the positioning rod 10 are moved inward and reset by the elastic force of the spring 11, so as to facilitate the rotation and disassembly of the fuel tank cover body 1.

[0033] The fixing sleeve 12 is provided with an annular groove 13 along the circumferential direction, and a hollow sealing ring 14 protruding from the side surface of the fixing sleeve 12 is horizontally pasted in the annular groove 13. The hollow sealing ring 14 is attached to the inner wall of the oil filling port to provide a third level of sealing protection for the oil filling port.

[0034] In this embodiment, the inner ring of the second sealing ring 5 is in the shape of an inclined surface that shrinks inward from bottom to top, so that the second sealing ring 5 can be tightly attached to the outer top of the oil filling port when the fuel tank cap body 1 is installed;

[0035] The inner bottom of the thread groove 6 expands outward, the inner top of the thread groove 6 is threadedly connected to the screw rod 7, and the inner diameter of the bottom of the thread groove 6 is larger than the outer diameter of the screw rod 7. The outer bottom of the screw rod 7 pushes the transmission block 9 to move horizontally in the thread groove 6.

[0036] The positioning rod 10 is perpendicular to the side surface of the transmission block 9, and when the spring 11 is in a natural state, the positioning rod 10 is flush with the side surface of the threaded connection column 2, so that the positioning rod 10 is easy to disassemble the threaded connection column 2 after the contraction;

[0037] In this embodiment, the transmission blocks 9 at the bottom of the screw rod 7 are distributed in an annular shape with equal spacing, so that the screw rod 7 can synchronously push each transmission block 9 to move outward;

[0038] In this embodiment, the vertical cross section of the hollow sealing ring 14 is an arc-shaped structure, which facilitates the hollow sealing ring 14 to shrink into the annular groove 13, and the outer surface of the hollow sealing ring 14 is coated with a polytetrafluoroethylene coating 15 to improve the wear resistance of the hollow sealing ring 14 and increase the service life of the hollow sealing ring 14;

[0039] There is a gap between the inner side of the hollow sealing ring 14 and the vertical inner wall of the annular groove 13, so that the hollow sealing ring 14 can be squeezed and contracted in the annular groove 13;

[0040] In this embodiment, the first sealing ring 3, the second sealing ring 5 and the hollow sealing ring 14 are all made of silicone, which has good chemical stability;

[0041] Specifically, a positioning groove matching the positioning rod 10 is pre-opened on the inner wall of the oil filling port of the fuel tank, and the outer top of the oil filling port is a smooth hole corresponding to the fixing sleeve 12. When the fuel tank cover body 1 is installed, the threaded connection column 2 is threadedly connected to the inner wall of the fuel tank filling port. When the threaded connection column 2 moves downward for installation, it drives the first sealing ring 3 to move downward and fit the top of the fuel filling port, and the fuel tank cover body 1 drives the extension cover 4 and the second sealing ring 5 to move downward. The second sealing ring 5 fits the outer wall of the fuel filling port. The threaded connection column 2 drives the hollow sealing ring 14 to move downward synchronously during the downward movement. The fuel filling port squeezes the hollow sealing ring 14 to shrink inwardly into the annular groove 13. The hollow sealing ring 14 is affected by its own elastic force to support the inner wall of the fuel filling port, so as to achieve multiple sealing of the fuel tank filling port, so that the fuel tank cover has high sealing performance and reduces oil leakage in the fuel tank.

[0042] After the fuel tank cap body 1 is installed, the screw 7 is driven to rotate by rotating the rotating plate 8, and the screw 7 cooperates with the threaded groove 6 to move downward. Since the outer bottom of the screw 7 is a frustum structure, the screw 7 moves downward to apply an outward thrust to the transmission block 9. The transmission block 9 is driven by the thrust to drive the positioning rod 10 to move outward into the positioning groove pre-opened on the inner wall of the oil filling port. The fuel tank cap is further fixed by the positioning rod 10 in cooperation with the positioning groove, which reduces the loosening of the fuel tank cap, improves the stability of the fuel tank cap during use, and is beneficial to indirectly improve the sealing performance of the fuel tank cap.

[0043] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-sealing fuel tank cap, comprising a fuel tank cap body, a threaded connection column arranged at the middle of the bottom end surface of the fuel tank cap body, and a first sealing ring embedded in the bottom of the fuel tank cap body; It is characterized in that The bottom edge of the fuel tank cover body extends downward to form an extension cover, and a threaded groove is provided in the middle of the top surface of the fuel tank cover body, and a fixing sleeve is detachably mounted on the threaded connection column; The inner ring of the extension cover covers the first sealing ring, and the inner wall of the extension cover is pasted with a second sealing ring; The thread groove extends downward to the inside of the threaded connection column, and a screw rod is threadedly installed in the thread groove; The top of the screw is fixedly provided with a rotating plate, the outer bottom of the screw is a smooth truncated cone structure with a larger upper part and a smaller lower part, and the outer bottom of the screw is provided with a plurality of transmission blocks that fit therewith, the transmission blocks are movably connected with the inner side of the thread groove, and a positioning rod is installed at one end of the transmission block away from the screw, a spring is movably sleeved on the positioning rod, and the positioning rod movably penetrates the side surface of the threaded connection column, and the two ends of the spring are respectively connected to the outer end face of the transmission block and the inner wall of the thread groove; The fixing sleeve is provided with an annular groove along the circumferential direction, and a hollow sealing ring protruding from the side surface of the fixing sleeve is installed in the annular groove.

2. The high-sealing fuel tank cap according to claim 1, characterized in that: The inner ring of the second sealing ring is in the shape of an inclined surface that shrinks inward from bottom to top.

3. The high-sealing fuel tank cap according to claim 1, characterized in that: The inner bottom of the thread groove expands outward, the inner top of the thread groove is connected with the screw thread, and the inner diameter of the bottom of the thread groove is greater than the outer diameter of the screw.

4. The high-sealing fuel tank cap according to claim 1, characterized in that: The transmission blocks at the bottom of the screw are distributed in a ring shape with equal intervals.

5. The high-sealing fuel tank cap according to claim 1, characterized in that: A plurality of vertical anti-skid grooves are provided on the side surface of the fuel tank cover body.

6. The high-sealing fuel tank cap according to claim 1, characterized in that: The positioning rod is perpendicular to the side surface of the transmission block, and when the spring is in a natural state, the positioning rod is flush with the side surface of the threaded connection column.

7. The high-sealing fuel tank cap according to claim 1, characterized in that: The vertical cross section of the hollow sealing ring is an arc-shaped structure, and the outer surface of the hollow sealing ring is coated with a polytetrafluoroethylene coating.

8. The high-sealing fuel tank cap according to claim 1, characterized in that: A distance is arranged between the inner side of the hollow sealing ring and the vertical inner wall of the annular groove.

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