Fuel tank cap integrated with anti-theft and locking state recognition functions

Abstract

The invention discloses a fuel tank cap integrated with anti-theft and locking state recognition functions, which comprises an outer cover, a lock shell, a lock cylinder and a key, and further comprises a fixing part clamped at a fuel tank opening; the center of the outer cover and the center of the lock shell are provided with a lower matching part and an upper matching part respectively, and the lower matching part is rotatably inserted into the upper matching part. The upper matching part is provided with a cavity and extends into the fixing part; a lock cylinder sleeve is fixedly arranged in the cavity; the lock cylinder penetrates through the lock cylinder sleeve, one end of the lock cylinder is provided with an upper eccentric shaft, and the upper eccentric shaft is sleeved with a spring bolt; an insertion groove is formed in the inner wall of the fixing assembly, and the lock cylinder drives the spring bolt to be inserted into or withdrawn from the insertion groove; when the oil tank opening is locked by the lock shell, the spring bolt is opposite to the slot; an elastic connecting assembly is arranged on the lock cylinder and used for connecting or separating the upper matching part and the lower matching part. A limiting assembly is arranged between the lock cylinder and the lock cylinder sleeve and used for limiting the lock cylinder to rotate till the blades directly face or leave the blade grooves. The fuel tank cap provided by the invention can provide the functions of theft prevention and locking state recognition at the same time.

Description

Technical Field

[0001] This invention relates to the field of vehicle fuel tank cap locking structures. More specifically, this invention relates to a fuel tank cap that integrates anti-theft and locking status recognition functions. Background Technology

[0002] Most fuel tank caps on the market only offer one of two functions: anti-theft or locking status detection. This is insufficient to meet the market's demand for both. Many fuel tank caps rely on subjective judgment, such as "fully tightened" or "cannot be tightened further," to identify the locking status. Due to individual user differences, this often leads to misjudgment, resulting in the cap not being fully tightened and causing seal failure. Therefore, it is necessary to provide a fuel tank cap that integrates both anti-theft and locking status detection functions, providing both theft prevention and objective locking status identification. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] To achieve these objectives and other advantages according to the present invention, a fuel tank cover integrating anti-theft and locking status recognition functions is provided, comprising an outer cover, a lock shell, a lock cylinder, and a key that mates with the lock cylinder hole, and a fixing component that is engaged at the fuel tank opening; the outer cover and the lock shell are respectively provided with a lower mating portion and an upper mating portion at their centers, the lower mating portion being rotatably inserted into the upper mating portion; the upper mating portion has a cavity at its center that extends into the fixing component; a lock cylinder sleeve is fixedly disposed within the cavity; the lock cylinder passes through the lock cylinder sleeve, one end of which has a lock cylinder hole extending out of the outer cover, and the other end extending out of the upper mating portion and being provided with an upper eccentric shaft, a locking tongue being sleeved on the upper eccentric shaft; a limiting post correspondingly provided on the upper mating portion to restrict the locking tongue from moving radially along the lock cylinder; a slot is provided on the inner wall of the fixing component, the rotation of the lock cylinder causing the locking tongue to insert into or retract from the slot; the slot is configured such that when the lock shell is rotated to lock the fuel tank opening, the locking tongue faces the slot; The lock cylinder is provided with an elastic connecting component, which connects or separates the upper mating part and the lower mating part as the lock cylinder rotates. Multiple blades are provided on the sidewall of the lock cylinder hole, and multiple blade slots are correspondingly provided inside the lock cylinder sleeve. A limiting component is also provided between the lock cylinder and the lock cylinder sleeve, which restricts the lock cylinder from rotating until each blade is aligned with or away from its corresponding blade slot. When the lock cylinder rotates until the bolt is inserted into the slot, the elastic connecting component precisely separates the upper and lower mating parts, while the limiting component ensures that each blade of the lock cylinder is aligned with its corresponding blade slot, allowing the key to be normally removed from the lock cylinder hole. When the lock cylinder rotates until the bolt exits the slot, the inner wall of the fixing component blocks the movement of the bolt, thus preventing the lock cylinder from continuing to rotate; simultaneously, the limiting component causes each blade of the lock cylinder to deviate from its corresponding blade slot, preventing the key from being removed from the lock cylinder.

[0005] Preferably, the lock cylinder includes a limiting section, a lock body section, a lower eccentric shaft, and a connecting section that are fixedly connected in sequence, and the limiting section, the lock body section, and the connecting section are coaxially arranged; the lower eccentric shaft is arranged between the lock body section and the connecting section, and its axis is offset from the axis of the lock body section.

[0006] Preferably, the elastic connection assembly includes a connecting ring and a return spring; the connecting ring is sleeved on the lower eccentric shaft, and its inner diameter is larger than the diameter of the lower eccentric shaft and smaller than the diameter of the lock body section; a connecting arm is fixedly provided on the connecting ring, a notch is opened on the lock cylinder sleeve, one end of the return spring is fixed on the inner wall of the lock cylinder sleeve facing the notch, and the other end abuts against the connecting ring; the upper mating part and the lower mating part are respectively provided with connecting grooves for the connecting arms to be inserted sequentially.

[0007] Preferably, the lower mating part is a cylinder with an open top, and a limiting hole communicating with the lower mating part is opened at the center of the outer cover, the diameter of the limiting hole being smaller than the diameter of the limiting segment; the upper mating part is a boss extending upward from the center of the lock shell, the cavity is formed by opening upward from the center of the bottom surface of the lock shell, and an annular groove is opened on the outer periphery of the cavity for the lower mating part to be inserted; the top surface of the upper mating part is provided with a central hole communicating with the cavity.

[0008] Preferably, the limiting component includes a limiting block fixed on the lock cylinder, and two limiting plates are provided on the inner wall of the lock cylinder sleeve. The opposite sides of the two limiting plates are a first limiting surface and a second limiting surface, respectively. The limiting block rotates between the two limiting plates as the lock cylinder rotates. When the limiting block contacts the first limiting surface, each blade is facing the blade groove. When the limiting block contacts the second limiting surface, each blade leaves the corresponding blade groove.

[0009] Preferably, the fixing component includes a fixing base and an inner cover. The outer edge of the fixing base is provided with protrusions that engage with the fuel tank opening. The inner cover is a hollow cylinder with a bottom opening, which is fixed on the fixing base. The upper mating part extends into the inner cover. The inner wall of the inner cover is provided with a plurality of slots spaced apart along its circumference.

[0010] Preferably, the fixing seat is provided with a claw seat on the side facing the inner cover, the claw seat is fixedly connected to the upper mounting part, and the claw seat rotates with the lock housing to lock the oil tank opening.

[0011] Preferably, the inner cover is further provided with a compression spring base, which is fixedly connected to the upper mating part, and a compression spring is provided between the base and the claw seat.

[0012] Preferably, the latch is provided with a strip-shaped hole corresponding to the upper eccentric shaft, and the end of the latch away from the strip-shaped hole is a long rod portion; two limiting posts are provided, and the distance between them is the width of the long rod portion.

[0013] The present invention has at least the following beneficial effects: 1. The fuel tank cap provided by the present invention integrates anti-theft and locking status recognition functions. While providing anti-theft function, it can accurately identify the locking status of the fuel tank cap by whether the key can be inserted or removed, avoiding misjudgment caused by subjective judgment and ensuring that the fuel tank cap is accurately locked and connected to the fuel tank opening.

[0014] 2. The fuel tank cover provided by the present invention integrates anti-theft and locking status recognition functions. By setting two layers of eccentric shafts on the lock cylinder: an upper eccentric shaft and a lower eccentric shaft, the movement of the lock tongue and the elastic connecting component can be simultaneously linked.

[0015] 3. The fuel tank cover provided by this invention integrates anti-theft and locking status recognition functions. By setting a slot on the fixed component instead of setting a slot at the fuel tank opening, it can be adapted to standard fuel tanks on the market without modifying the fuel tank.

[0016] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0017] Figure 1 This is an exploded view of the fuel tank cap integrating anti-theft and locking status recognition functions as described in this invention; Figure 2 This is a cross-sectional view of the fuel tank cap integrating anti-theft and locking status recognition functions as described in this invention; Figure 3 This is a schematic diagram of the lock cylinder described in this invention; Figure 4 This is a schematic diagram of the structure of the elastic connection component of the present invention when the lock shell and the outer cover are not connected; Figure 5 This is a schematic diagram of the structure of the elastic connection assembly of the present invention connecting the lock shell and the outer cover; Figure 6 This is a schematic diagram showing the positions of the first limiting surface and the second limiting surface of the present invention; Figure 7 This is a schematic diagram of the structure when the limiting block of the present invention is in contact with the first limiting surface; Figure 8 This is a schematic diagram of the structure when the limiting block of the present invention is in contact with the second limiting surface; Figure 9 This is a schematic diagram of the assembly method of the locking tongue and the limiting post according to the present invention; Figure 10 This is a schematic diagram of the structure when the locking tongue of the present invention is inserted into the slot; Figure 11 This is a schematic diagram of the structure of the fixing component described in this invention; Figure 12 A schematic diagram of the structure of the chuck described in this invention; Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0019] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] like Figures 1 to 12As shown, this invention provides a fuel tank cover integrating anti-theft and locking status recognition functions, including an outer cover 5, a lock shell 6, a lock cylinder 12, and a key 23 that mates with the lock cylinder hole of the lock cylinder 12. It also includes a fixing component that is snapped into the fuel tank opening. The outer cover 5 and the lock shell 6 are respectively provided with a lower mating part 51 and an upper mating part 61 at their centers. The lower mating part 51 is rotatably inserted into the upper mating part 61. The upper mating part 61 has a cavity at its center and extends into the fixing component. A lock cylinder sleeve 10 is fixedly disposed within the cavity. The lock cylinder 12 passes through the lock cylinder sleeve. Inside the sleeve 10, one end of which has a lock cylinder hole extends out of the outer cover 5, and the other end extends out of the upper mating part and is provided with an upper eccentric shaft 125. A lock tongue 19 is sleeved on the upper eccentric shaft 125. A limiting post 62 is correspondingly provided on the upper mating part 61 to restrict the movement of the lock tongue 19 along the radial direction of the lock cylinder. A slot 201 is provided on the inner wall of the fixing component. The rotation of the lock cylinder 12 causes the lock tongue 19 to insert into or retract from the slot 201. The slot 201 is configured such that when the lock case 6 rotates to the locking oil tank opening, the lock tongue 19 is directly facing the slot 201. The lock cylinder 12 is provided with an elastic connecting component, which is used to connect or separate the upper mating part 61 and the lower mating part 51 as the lock cylinder 12 rotates; a plurality of blades 24 are provided on the side wall of the lock cylinder hole, and a plurality of blade slots are correspondingly provided in the lock cylinder sleeve 10; a limiting component is also provided between the lock cylinder 12 and the lock cylinder sleeve 10, which is used to limit the rotation of the lock cylinder 12 to each blade 24 being aligned with or away from the corresponding blade slot; when the lock cylinder 12 rotates to the point where the bolt 19 is inserted into the slot 201 At the same time, the elastic connecting component precisely separates the upper mating part 61 and the lower mating part 51, and the limiting component ensures that each blade 24 of the lock cylinder 12 is aligned with its corresponding blade groove, allowing the key 23 to be normally pulled out of the lock cylinder hole; when the lock cylinder 12 rotates until the bolt 19 exits the slot 201, the inner wall of the fixing component blocks the movement of the bolt 19, thereby preventing the lock cylinder 12 from continuing to rotate; at the same time, the limiting component causes each blade 24 of the lock cylinder 12 to deviate from its corresponding blade groove, preventing the key from being pulled out of the lock cylinder.

[0021] In this technical solution, the lock housing 6 and the outer cover 5 are rotatably connected through the upper mating part 61 and the lower mating part 51. When the elastic connecting assembly connects the upper mating part 61 and the lower mating part 51, the lock housing 6 and the outer cover 5 are connected as a whole. At this time, manually rotating the outer cover 5 from the outside can simultaneously drive the lock housing 6 to rotate, so that the lock housing 6 connects with the fuel tank opening. When the elastic connecting assembly does not connect the upper mating part 61 and the lower mating part 51, the outer cover 5 can only rotate relative to the lock housing 6. When manually rotating the outer cover 5 from the outside, it will not be able to synchronously drive the lock housing 6 to rotate, thus achieving the anti-theft function.

[0022] The connection between the lock cylinder 12 and each of the blades 24 is the same as the structure of a conventional blade lock in the art. Specifically, the side of the lock cylinder 12 is provided with square grooves corresponding to each of the blades, and the square grooves are provided with blade return springs 25. When the key 23 is inserted into or pulled out of the lock cylinder 12, each blade 24 is repeatedly ejected and retracted by the action of the serrations on both sides of the key 23 and the blade return springs 25. Therefore, when each blade 24 is aligned with the corresponding blade groove, the key 23 can be normally pulled out of the lock cylinder hole; when each blade 24 is no longer aligned with the corresponding blade groove, each blade is blocked by the inner wall of the lock cylinder sleeve 10 and cannot be ejected normally, and the key 23 cannot be inserted or pulled out. This invention achieves the identification of the oil tank cap's locking status through objective conditions by setting the lock housing 6 to drive the lock cylinder 12 and the lock tongue 19 to rotate synchronously to lock the oil tank opening. When the lock cylinder 12 rotates to the point where the lock tongue 19 is inserted into the slot 201, each of the blades 24 is exactly aligned with its corresponding blade slot, allowing the key to be inserted and removed normally. Conversely, when the lock cylinder 12 rotates to the point where the lock tongue 19 is withdrawn from the slot 201, each of the blades 24 is not aligned with its corresponding blade slot, preventing the key from being inserted and removed normally.

[0023] When the lock housing 6 is rotated to lock with the fuel tank opening, i.e., when the fuel tank cap is in the locked state, the latch 19 is aligned with the slot 201. Then, the key 23 rotates the lock cylinder 12, and the upper eccentric shaft 125 on the upper part of the lock cylinder 12 drives the latch 19 to insert into the slot 201 along the limiting post 62. At this time, the limiting component ensures that the blade 24 is aligned with the blade slot, and the blade 24 can pop out normally, meaning that the key 23 can be inserted or removed normally. At the same time, the elastic connecting component does not connect the outer cover 5 to the lock housing 6, the outer cover 5 is in a 360° free-rotation state, and the fuel tank cap is in the anti-theft state.

[0024] When the key 23 is turned to rotate the lock cylinder 12, the upper eccentric shaft 125 pushes the bolt 19 out of the slot 201. At this time, the limiting component prevents the blade 24 from being directly aligned with the blade slot, and the blade 24 cannot pop out normally. Therefore, the key 23 cannot be inserted or removed normally. Simultaneously, the elastic connecting component connects the outer cover 5 to the lock housing 6. Then, manually turning the outer cover 5 causes the lock housing 6 to rotate, separating it from the oil tank opening. During this process, the lock housing 6 causes the bolt 19 to rotate. When the bolt 19 is no longer directly aligned with the slot 201, it is blocked by the inner wall of the fixing component. The bolt 19 cannot move along the limiting post 62, thus preventing the upper eccentric shaft 125 from rotating, causing the lock cylinder 12 to be unable to rotate. At this time, the key 23 still cannot be removed from the lock cylinder hole.

[0025] Therefore, if the key 23 can be inserted or removed normally, it indicates that the fuel tank cap is in a locked state; if the key 23 cannot be inserted or removed, it indicates that the cap is not tightened properly and is in an unlocked state; thus, the locking status of the fuel tank cap can be identified through objective conditions.

[0026] In another technical solution, such as Figure 2 and Figure 3 As shown, the lock cylinder 12 includes a limiting section 121, a lock body section 122, a lower eccentric shaft 123, and a connecting section 124, which are sequentially fixedly connected. The limiting section 121, the lock body section 122, and the connecting section 124 are coaxially arranged. The lower eccentric shaft 123 is located between the lock body section 122 and the connecting section 124, and its axis is offset from the axis of the lock body section 122. The limiting section 121 is the part of the lock cylinder 12 that extends out of the outer cover 5, and is used to axially limit the outer cover 15. The lock body section 122 is the part of the lock cylinder 12 located inside the lock cylinder sleeve 10. The lock cylinder hole and each of the blades are all located in the lock body section 122, and the axis of the lock body section 122 can be regarded as the axis of the lock cylinder 12. The lower eccentric shaft 123 is used to install the elastic connecting assembly. The connecting portion 124 is the part of the lock cylinder 12 that extends out of the lock cylinder sleeve 10 and is also located in the upper mating portion 61. An upper eccentric shaft 125 is disposed at the top of the connecting portion 124, and the axis of the upper eccentric shaft 125 is offset from the axis of the lock cylinder 12. The eccentricity of the upper eccentric shaft 125 relative to the axis of the lock cylinder 12 is determined based on the stroke of the bolt 19 when it inserts into or exits the slot 201. The eccentricity of the lower eccentric shaft 123 relative to the axis of the lock cylinder 12 is determined based on the stroke of the connecting arm when it inserts into or exits the connecting groove on the lower mating portion 51.

[0027] In another technical solution, the elastic connection assembly includes a connecting ring 14 and a return spring 15; the connecting ring 14 is sleeved on the lower eccentric shaft 123, and its inner diameter is larger than the diameter of the lower eccentric shaft 123 and smaller than the diameter of the lock body section 12; a connecting arm is fixedly provided on the connecting ring 14, a notch is provided on the lock cylinder sleeve 10, one end of the return spring 15 is fixed on the inner wall of the lock cylinder sleeve 10 opposite to the notch, and the other end abuts against the connecting ring 14; the upper mating part 61 and the lower mating part 51 are respectively provided with connecting grooves for the connecting arms to be inserted sequentially.

[0028] Reference Figure 4 and Figure 5 When the key 23 is turned to rotate the lock cylinder 12, causing the bolt 19 to insert into the slot 201, the lower eccentric shaft 123 pushes the connecting ring 14 to compress the return spring 15. The connecting arm then exits from the connecting groove of the lower mating part 51 and remains in the connecting groove of the upper mating part 61. Figure 4 As shown, at this time, the outer cover 5 and the lock shell 6 are no longer connected. When the key 23 is turned to rotate the lock cylinder 12, the bolt 19 is disengaged from the slot 201. At this time, the lower eccentric shaft 123 releases the connecting ring 14. Under the action of the return spring 15, the connecting arm slides along the connecting groove on the upper mating part 61. When the connecting arm is inserted into the connecting groove on the lower mating part 51, as... Figure 5 As shown, the outer cover 5 and the lock housing 6 are connected together by the connecting arm. When the outer cover 5 is turned from the outside, the lock housing 6 will rotate together, thereby allowing the oil tank cap to be turned and locked.

[0029] In another technical solution, the lower mating part 51 is a cylinder with an open top. A limiting hole communicating with the lower mating part is formed at the center of the outer cover 5. The diameter of the limiting hole is smaller than the diameter of the limiting segment 121. The upper mating part 61 is a boss extending upward from the center of the lock housing 6. The cavity is formed by opening upward from the center of the bottom surface of the lock housing 6. An annular groove for insertion of the lower mating part 51 is formed on the outer periphery of the cavity. A central hole communicating with the cavity is formed on the top surface 61 of the upper mating part. (Refer to...) Figure 2The outer cover 5 can cover the lock housing 6. The lower mating part 51 is located at the inner bottom of the outer cover 5. The outer cover 5 rotates relative to the lock housing 6 by inserting the lower mating part 51 into the annular groove. The limiting hole cooperates with the limiting section 121 to axially position the outer cover 5 and prevent the outer cover 5 from separating from the lock housing 6. The remaining part of the lock cylinder 12 extends into the lock cylinder sleeve 10 in the cavity from the limiting hole. The connecting section 124 extends out of the upper mating part 61 through the central hole. The outer cover 5 is connected to a dust cover 1 by a dust cover return spring 4 and a rotating shaft 3 to cover the limiting hole and the lock cylinder hole. A sealing gasket 2 is also provided inside the dust cover 1.

[0030] In another technical solution, such as Figures 6 to 8 As shown, the limiting assembly includes a limiting block 126 fixed to the lock cylinder 12. Two limiting plates are provided on the inner wall of the lock cylinder sleeve 10, with opposite sides of the two limiting plates being a first limiting surface 102 and a second limiting surface 101, respectively. The limiting block 126 rotates between the two limiting plates as the lock cylinder 12 rotates. When the limiting block 126 contacts the first limiting surface 102, each blade 24 faces the blade groove; when the limiting block 126 contacts the second limiting surface 101, each blade 24 leaves its corresponding blade groove. Preferably, the limiting block 126 is positioned close to the limiting segment 121. It should be noted that a limiting portion can also be provided circumferentially on the inner wall of the lock cylinder sleeve 10, with the two end faces of the limiting portion serving as the first limiting surface 102 and the second limiting surface 101. The positions of the first limiting surface 102 and the second limiting surface 101 on the inner wall of the lock cylinder sleeve 10, and the position of the limiting block 126 on the lock cylinder 12, are determined according to the rotation position of the blade 24 when the bolt 19 is inserted into or withdrawn from the slot 201. It is necessary to ensure that: when the key 23 rotates the lock cylinder 12, causing the bolt 19 to be inserted into the slot 201, the limiting block 126 is in close contact with the first limiting surface 102, at which time each blade 24 can pop out normally, and the key 23 can be inserted or withdrawn normally; when the key 23 is turned to rotate the lock cylinder 12, causing the bolt 19 to withdraw from the slot 201, during the process from when the limiting block 126 leaves the first limiting surface 102 to the second limiting surface 101, each blade 24 is no longer directly facing the blade groove, and each blade 24 is blocked by the inner wall of the lock cylinder sleeve 10, unable to pop out normally, so that the key 23 cannot be inserted or withdrawn.

[0031] In another technical solution, such as Figure 11As shown, the fixing component includes a fixing base 9 and an inner cover 20. The outer edge of the fixing base 9 is provided with protrusions that engage with the fuel tank opening. The inner cover 20 is a hollow cylindrical body with an open bottom, fixed to the fixing base 9. The upper mating part 61 extends into the inner cover 20. Multiple slots 201 are spaced circumferentially on the inner wall of the inner cover 20. The protrusions on the outer side of the fixing base 9 engage with the slots in the fuel tank opening, thus maintaining a fixed connection between the fixing base 9 and the fuel tank. The inner cover 20 is fixedly assembled to the fixing base 9 using self-tapping screws 21. The fixing component, consisting of the fixing base 9 and the inner cover 20, remains fixed to the fuel tank.

[0032] Furthermore, such as Figure 12 As shown, a claw seat 11 is provided on the side of the fixed base 9 facing the inner cover 20. The claw seat 11 is fixedly connected to the upper mounting part 61. The claw seat 61 rotates with the lock housing 6 to lock the oil tank opening. Multiple claws are arranged along the axial direction of the claw seat 11. As the lock housing 6 rotates, the claws move along the guide arc of the oil tank opening until they engage with the latch of the oil tank opening, at which point the lock housing 6 completes the locking of the oil tank opening. Considering that the fixed base 9 is provided with a column for installing self-tapping screws 21, an arc-shaped sliding groove is provided on the claw seat 11 corresponding to each column to facilitate the rotation of the claw seat 11 with the lock housing 6. Preferably, a plastic sealing gasket 7 and a rubber sealing gasket 8 are also provided between the fixed base 9 and the lock housing 6.

[0033] Furthermore, a compression spring base 18 is also provided inside the inner cover 20, which is fixedly connected to the upper mating part 61, and a compression spring 13 is provided between it and the claw seat 11. The compression spring base 18 is fixedly assembled to the upper mating part 61 by screws 22. The compression spring 13 is installed between the compression spring base 18 and the claw seat 11 so that the claw locks the oil tank opening. A through hole is opened in the center of the compression spring base 18 so that the connecting section 124 can extend out, thereby allowing the locking tongue 19 to be positioned above the compression spring base 18.

[0034] In another technical solution, such as Figure 9 and Figure 10As shown, the latch 19 has a strip-shaped hole corresponding to the upper eccentric shaft 125, and the end of the latch 19 away from the strip-shaped hole is a long rod portion. Two limiting posts 62 are provided, with the distance between them being the width of the long rod portion. The limiting posts 62 extend out of the compression spring base 18. Rotation of the upper eccentric shaft 125 causes the long rod portion of the latch 19 to move between the two limiting posts 62, restricting the latch 19 to radial movement only towards the lock cylinder 12, thereby allowing it to insert into or exit the slot 201. The limiting posts 62 extend out of the compression spring base 18.

[0035] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An oil filler cap integrated with anti-theft and lock state recognition functions, comprising an outer cover, a lock housing, a lock cylinder and a key cooperating with a key hole of the lock cylinder, characterized in that, The fixed component is clamped at the oil tank opening; the center of the outer cover and the lock shell is respectively provided with a lower matching part and an upper matching part, the lower matching part is rotatably inserted into the upper matching part; the center of the upper matching part has a cavity, which extends into the fixed component; a lock cylinder sleeve is fixedly arranged in the cavity; the lock cylinder is arranged in the lock cylinder sleeve, one end of which is arranged to extend out of the outer cover, and the other end is arranged to extend out of the upper matching part and is provided with an upper eccentric shaft, the upper eccentric shaft is sleeved with a lock tongue; the upper matching part is correspondingly provided with a limiting column for limiting the radial movement of the lock tongue along the lock cylinder; a slot is formed in the inner wall of the fixed component, and the rotation of the lock cylinder drives the lock tongue to insert into or exit from the slot; the slot is arranged such that when the lock shell is rotated to lock the oil tank opening, the lock tongue is opposite to the slot; The lock cylinder is provided with an elastic connecting assembly, which is used to connect or separate the upper matching part and the lower matching part with the rotation of the lock cylinder; a plurality of blades are arranged on the side wall of the lock cylinder hole, and a plurality of blade grooves are correspondingly formed in the lock cylinder sleeve; a limiting assembly is further arranged between the lock cylinder and the lock cylinder sleeve, which is used to limit the rotation of the lock cylinder to make each blade of the lock cylinder opposite or away from the corresponding blade groove; when the lock cylinder is rotated to insert the lock tongue into the slot, the elastic connecting assembly just separates the upper matching part and the lower matching part, and at the same time, the limiting assembly makes each blade of the lock cylinder opposite to the corresponding blade groove, so that the key can be normally pulled out of the lock cylinder hole; when the lock cylinder is rotated to exit the slot, the inner wall of the fixed component blocks the movement of the lock tongue, thereby preventing the lock cylinder from continuing to rotate; at the same time, the limiting assembly makes each blade of the lock cylinder deviate from the corresponding blade groove, so that the key cannot be pulled out of the lock cylinder.

2. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 1, characterized in that, The lock cylinder comprises a limiting section, a lock body section, a lower eccentric shaft and a connecting section which are fixedly connected in sequence; the limiting section, the lock body section and the connecting section are coaxially arranged; the lower eccentric shaft is arranged between the lock body section and the connecting section, and the axis deviates from the axis of the lock body section.

3. The fuel tank cap integrated with the anti-theft and lock state recognition function according to claim 2, characterized in that, The elastic connecting assembly comprises a connecting ring and a return spring; the connecting ring is sleeved on the lower eccentric shaft, the inner diameter of the connecting ring is greater than the diameter of the lower eccentric shaft and less than the diameter of the lock body section; a connecting arm is fixedly arranged on the connecting ring, a notch is formed in the lock cylinder sleeve, one end of the return spring is fixed on the inner wall of the lock cylinder sleeve opposite to the notch, and the other end abuts against the connecting ring; the upper matching part and the lower matching part are respectively correspondingly provided with connecting grooves for sequentially inserting the connecting arm.

4. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 2, characterized in that, The lower matching part is an open-top cylinder, a limiting hole is formed in the center of the outer cover and communicates with the lower matching part, and the diameter of the limiting hole is less than the diameter of the limiting section; the upper matching part is a boss extending upward from the center of the lock shell, the cavity is formed by upwardly forming a cavity in the center of the bottom surface of the lock shell, and an annular groove is formed in the outer periphery of the cavity for inserting the lower matching part; a center hole is formed in the top surface of the upper matching part and communicates with the cavity.

5. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 1, characterized in that, The limiting assembly comprises a limiting block fixed on the lock cylinder, two limiting plates are arranged on the inner wall of the lock cylinder sleeve, the opposite sides of the two limiting plates are respectively a first limiting surface and a second limiting surface, the limiting block rotates between the two limiting plates along with the lock cylinder, when the limiting block contacts with the first limiting surface, each blade is opposite to the blade groove; when the limiting block contacts with the second limiting surface, each blade is away from the corresponding blade groove.

6. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 1, characterized in that, The fixing component comprises a fixing seat and an inner cover, the outer edge of the fixing seat is spaced apart and provided with a convex platform clamped with the oil tank opening, the inner cover is a hollow cylinder with an open bottom, which is fixed on the fixing seat, the upper fitting part extends into the inner cover, and a plurality of insertion slots are arranged on the inner wall of the inner cover and spaced apart along the circumference thereof.

7. The fuel tank cap integrated with the anti-theft and lock state recognition function according to claim 6, characterized in that, The side of the fixing seat facing the inner cover is provided with a claw seat, the claw seat is fixedly connected with the upper mounting part, and the claw seat rotates along with the lock shell to lock the oil tank opening.

8. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 1, characterized in that, The inner cover is also provided with a compression spring base fixedly connected with the upper fitting part and provided with a compression spring between the claw seat.

9. The oil filler cap integrated with the anti-theft and lock state recognition function according to claim 1, characterized in that, The lock tongue is provided with a strip-shaped hole corresponding to the upper eccentric shaft, and the end of the lock tongue away from the strip-shaped hole is a long rod part. The limiting column is provided with two limiting columns, and the distance between the two limiting columns is the width of the long rod part.

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