Multifunctional anti-theft valve of automobile fuel tank

Abstract

The invention discloses a multifunctional anti-theft valve of an automobile fuel tank, which relates to the technical field of automobile fuel tank theft prevention, and comprises a refueling valve body, a mechanical lock mechanism for locking a sealing cover, an alarm mechanism and a plugging assembly mechanism, and the top of the refueling valve body is provided with the sealing cover. The sealing cover is locked on the refueling valve body through the mechanical lock structure to prevent burglary, when the mechanical lock structure is normally unlocked to open the sealing cover for refueling, a rotary lock cylinder of the mechanical lock structure is unlocked and rotated, so that an arranged clamping block is driven to move to clamp a plugging block in the refueling valve body, and the refueling valve body is conveniently driven to be opened together when the cover is opened; when the sealing cover is forcibly prized open and is not normally unlocked, the clamping block connected with the sealing cover cannot complete the action of clamping and butting with the plugging block, at the moment, the plugging block cannot be taken out when the sealing cover is opened and detached, and notches in the two sides of the plugging block are sealed by elastic plugging pieces, so that the plugging block cannot be taken out by finding a grabbing point from an external appliance; therefore, the anti-theft effect is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of automobile fuel tank anti-theft, and in particular to a multifunctional anti-theft valve of an automobile fuel tank. Background Art

[0002] A car fuel tank is a container for storing gasoline, which is convenient for using gasoline as fuel to provide power during the operation of the car. Generally, a car fuel tank is equipped with a refueling port for convenient refilling of gasoline. The refueling port is provided with a refueling valve and a fuel tank cap to facilitate opening or closing the refueling port.

[0003] Existing cargo trucks, especially semi-trailers, have fuel tanks that are exposed to the outside, and their refueling ports and refueling valves are exposed on the outside. They are only closed by the fuel tank cap, which is easy to open and steal gasoline. In order to prevent theft, a lock is generally installed on the fuel tank cap of the refueling valve to lock it.

[0004] The existing refueling valve assembly of the automobile fuel tank has the following disadvantages: the existing gasoline tank, especially the refueling valve assembly of the semi-trailer, is closed only by the fuel tank cap, which is easy to be unscrewed manually. Although a mechanical lock is installed to lock the fuel tank cap, it is easy for criminals to cut and destroy the mechanical lock by some tools, so that the fuel tank cap can be removed, resulting in the refueling valve position being directly opened, so that gasoline can be directly stolen. That is, the existing automobile fuel tank refueling valve body has a single anti-theft function and a general anti-theft effect. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional anti-theft valve for an automobile fuel tank, so as to solve the technical problem that the anti-theft effect of the fuel tank filling valve of the automobile fuel tank in the prior art is mediocre.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A multifunctional anti-theft valve for an automobile fuel tank comprises a fuel filling valve body, a sealing cover is provided on the top of the fuel filling valve body, and further comprises:

[0008] A mechanical lock mechanism for locking the closing cover; the mechanical lock mechanism is arranged on the closing cover, and an arc lock groove matching the mechanical lock mechanism is arranged on the inner wall of the refueling valve body;

[0009] An alarm mechanism and a blocking assembly mechanism, wherein the alarm mechanism is arranged between the closing cover and the refueling valve body; the blocking assembly mechanism is arranged inside the refueling valve body, and when the mechanical lock mechanism is unlocked, the closing cover is connected to the blocking assembly mechanism, and when the mechanical lock mechanism is locked, the closing cover is separated from the blocking assembly mechanism.

[0010] As a further solution of the present invention: the closure cover includes a folded edge for wrapping the top of the refueling valve body, and the folded edge is an annular body.

[0011] As a further solution of the present invention: the alarm mechanism includes a pressure sensor, an alarm, an annular mounting groove, and a movable plate for squeezing the pressure sensor, the annular mounting groove is opened at the top edge of the refueling valve body, there are multiple pressure sensors, and they are circumferentially equidistantly distributed on the inner wall of the annular mounting groove, each of the pressure sensors is electrically connected to the alarm, a support plate is fixedly arranged on the inner side of the closing cover, a cavity is arranged between the support plate and the closing cover, there are multiple movable plates, which are equidistantly distributed around the support plate, a plurality of axis frames are circumferentially equidistantly arranged on the inner wall of the folded edge, and the movable plates, axis frames, and pressure sensors are distributed corresponding to each other, each of the movable plates is rotatably connected to the corresponding axis frame through a rotating shaft, and positioning springs for clamping and positioning the movable plate are fixedly connected to the folded edge and the support plate.

[0012] As a further solution of the present invention: a camera electrically connected to the pressure sensor is fixedly arranged on the outer side of the refueling valve body.

[0013] As a further solution of the present invention: the bottom of the movable plate is located at a position higher than the bottom edge of the folded edge.

[0014] As a further solution of the present invention: a sleeve is provided through the closing cover, and the sleeve is slidably matched with the closing cover, one end of the sleeve is in the cavity, one end of the mechanical locking mechanism is in the sleeve, a supporting spring is fixedly connected between the end of the sleeve in the cavity and the support plate, the end of the sleeve in the cavity is also circumferentially connected to a plurality of traction steel wires, and the end of each of the traction steel wires is respectively connected to the top of the corresponding movable plate, and a plurality of groups of steering fixed pulleys matching the traction steel wires are distributed on the inner wall of the cavity.

[0015] As a further solution of the present invention: the mechanical lock mechanism includes a lock body, a rotating lock core and a lock tongue. The lock body is fixedly arranged on the closing cover and passes through the support plate. The rotating lock core is rotatably arranged in the lock body. One end of the rotating lock core passes through the lock body and is fixedly connected to the lock tongue. The arc lock groove cooperates with the lock tongue.

[0016] As a further solution of the present invention: the blocking assembly mechanism includes a blocking block that cooperates with the inner side of the refueling valve body and a linkage clamping piece that cooperates with the rotary lock core. A positioning support ring for supporting the positioning blocking block is fixedly arranged on the inner wall of the refueling valve body. Notches are provided on both sides of the top of the blocking block. An elastic blocking piece is arranged inside the notch. The clamping end of the linkage clamping piece is inserted into the notch and compresses the elastic blocking piece. The linkage clamping piece clamps the blocking block as the rotary lock core rotates and unlocks.

[0017] As a further solution of the present invention: the linkage clamping member includes a driving gear, a rack and a clamping block, the driving gear is coaxially fixedly connected to the rotating lock core, there are two clamping blocks, and they are distributed on both sides below the support plate, each of the clamping blocks is fixedly connected to a connecting guide rod, both sides of the bottom surface of the support plate are fixedly connected to guide sleeves, the connecting guide rod slides through the guide sleeves, there are two racks, and they are respectively fixedly connected to the connecting guide rods, and the two racks are meshed with both sides of the driving gear.

[0018] As a further solution of the present invention: the elastic blocking member includes a filling slider and a connecting spring, the filling slider is slidably arranged in the gap, and the filling slider is connected to the gap through the connecting spring.

[0019] Beneficial effects of the present invention:

[0020] 1. The closing cover of the present invention is locked on the refueling valve body by a mechanical lock structure to prevent theft. When the mechanical lock structure is unlocked normally to open the closing cover for refueling, the rotary lock core of the mechanical lock structure is unlocked and rotated, thereby driving the provided clamping block to move and clamp the blocking block in the refueling valve body, so that the refueling valve body can be opened together when the cover is opened. When the closing cover is forcibly pried open and the normal unlocking is not performed, the clamping block connected to the closing cover cannot complete the action of clamping and docking with the blocking block. At this time, the blocking block cannot be taken out when the closing cover is opened and removed, and the gaps on both sides of the blocking block are sealed by elastic sealing parts, resulting in the inability to find a grabbing point from an external tool to take out the blocking block, thereby ensuring the anti-theft effect.

[0021] 2. When the edge of the closing cover of the present invention is forcibly pried open by an external device, the edge is deformed, thereby driving the movable plate distributed at the corresponding position on the inside to squeeze the corresponding pressure sensor. The pressure sensor activates the alarm and also activates the camera to take pictures and collect evidence, thereby realizing multi-functional anti-theft.

[0022] 3. The keyhole of the mechanical lock mechanism of the present invention is hidden in a slidable sleeve. When the lock is pried, the sleeve is likely to slide into the closed cover. The sleeve pulls the traction wire during the sliding process, so that the distributed traction wire pulls the distributed movable plate to deflect, and the pressure sensor can also be used to operate the alarm and camera, which is convenient for anti-theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial enlarged structural schematic diagram of the docking of the filling valve body and the closing cover in the present invention;

[0026] Figure 3 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0027] Figure 4 yes Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0028] Figure 5 It is a bottom view structural schematic diagram of the closed cover and the clamping block in the present invention in cooperation with each other;

[0029] Figure 6 It is a schematic diagram of the structure when the lock tongue and the arc lock groove are connected in the present invention;

[0030] Figure 7 It is a schematic diagram of the structure when the lock tongue and the arc lock groove are separated in the present invention;

[0031] Figure 8 is a schematic diagram of the closed cover of the present invention when it is normally unlocked and opened by the extended key;

[0032] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at point C in the middle.

[0033] In the figure: 1. refueling valve body; 2. fuel tank body; 3. alarm; 4. closing cover; 5. camera; 6. chain; 7. positioning support ring; 8. blocking block; 9. folded edge; 10. sleeve; 11. lock body; 12. rotating lock cylinder; 13. rack; 14. driving gear; 15. arc lock groove; 16. cavity; 17. support plate; 18. support spring; 19. traction wire; 20. oil filter assembly; 21. movable plate; 22. shaft frame; 23. annular mounting groove; 24. pressure sensor; 25. positioning spring; 26. steering fixed pulley; 27. gap; 28. clamping block; 29. ​​filling slide block; 30. connecting spring; 31. tooth groove; 32. convex tooth; 33. connecting guide rod; 34. guide sleeve; 35. lock tongue; 36. extended key. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 9As shown, a multifunctional anti-theft valve for an automobile fuel tank comprises a refueling valve body 1, which is fixedly arranged at an angle on one side of the top of the fuel tank body 2, and an oil filter assembly 20 is installed at the bottom of the refueling valve body 1, and a closing cover 4 is arranged on the top of the refueling valve body 1. When refueling is needed, the closing cover 4 is opened, and then refueling is carried out from the opening position of the refueling valve body 1; and in order to prevent the opened closing cover 4 from being lost, a lock chain 6 is connected between the closing cover 4 and the outer wall of the refueling valve body 1 to avoid the closing cover 4 from being lost; the anti-theft valve also comprises a mechanical lock mechanism, an alarm mechanism, and a blocking assembly mechanism for locking the closing cover 4; the mechanical lock mechanism is arranged on the closing cover 4, and an arc lock groove 15 matched with the mechanical lock mechanism is arranged on the inner wall of the refueling valve body 1. When the closing cover 4 needs to be opened for refueling, the mechanical lock mechanism needs to be opened by a key to separate it from the arc lock groove 15, and then the closing cover 4 is removed; the alarm mechanism When the closure cover 4 is locked on the refueling valve body 1 by the mechanical lock mechanism, the closure cover 4 and the plugging assembly mechanism are in a separated state. At this time, if the lawless elements forcibly pry open the closure cover 4, they can only open the closure cover 4, and cannot take out the plugging assembly mechanism together, thereby ensuring that even if the closure cover 4 is forcibly pried open, the gasoline in the fuel tank body 2 cannot be directly stolen.

[0036] In some specific embodiments, the closure cover 4 includes a folded edge 9 for wrapping the top of the refueling valve body 1. The folded edge 9 is an annular body, which facilitates the positioning and assembly of the closure cover 4 to the top of the refueling valve body 1 and then locked by a mechanical locking mechanism.

[0037] In some specific embodiments, in combination Figures 2 to 4As shown, the alarm mechanism includes a pressure sensor 24, an alarm 3, an annular mounting groove 23, and a movable plate 21 for squeezing the pressure sensor 24. The annular mounting groove 23 is opened at the top edge of the refueling valve body 1. A plurality of pressure sensors 24 are provided, and are equidistantly distributed on the inner wall of the annular mounting groove 23 in the circumferential direction. The inner and outer ring side walls of the annular mounting groove 23 are both installed with pressure sensors 24. Each pressure sensor 24 is electrically connected to the alarm 3. The alarm 3 can be installed at a location according to actual needs. It can be installed on the fuel tank body 2 or in the cab. A support plate 17 is fixedly provided on the inner side of the cover 4, a cavity 16 is provided between the support plate 17 and the closed cover 4, a plurality of movable plates 21 are provided, which are evenly distributed around the support plate 17, a plurality of shaft frames 22 are evenly distributed circumferentially on the inner wall of the folded edge 9, and the movable plates 21, the shaft frames 22, and the pressure sensors 24 are distributed corresponding to each other, each movable plate 21 is rotatably connected to the corresponding shaft frame 22 through a rotating shaft, and positioning springs 25 for clamping and positioning the movable plates 21 are fixedly connected to the folded edge 9 and the support plate 17, and positioning springs 25 are respectively provided on both sides of the top of each movable plate 21.

[0038] A camera 5 electrically connected to the pressure sensor 24 is also fixedly provided on the outside of the refueling valve body 1. When the pressure sensor 24 generates a signal, it is fed back to the equipped controller. The controller receives and processes the signal, and then sends an instruction to start the camera 5, so that it can take pictures of criminals to facilitate evidence collection.

[0039] It should be noted that in order to ensure that after the closing cover 4 is covered on the refueling valve body 1, the bottom of each movable plate 21 is aligned with a group of pressure sensors 24, protruding columns can be provided on both sides of the bottom of the folded edge 9 of the closing cover 4, and positioning cylinders corresponding to the protruding columns can be provided on both sides of the outer wall of the refueling valve body 1.

[0040] When the closing cover 4 is covered on the refueling valve body 1, the bottom of the distributed movable plate 21 is inserted into the annular mounting groove 23 and aligned with the pressure sensor 24, and then locked by a mechanical locking mechanism. When criminals want to pry open the closing cover 4 directly, they must use tools to pry from the position of the folded edge 9. During this process, the position where the closing cover 4 is pried will be deformed, which will naturally cause the movable plate 21 at the corresponding position to deflect along with the deformation position, thereby contacting the pressure sensor 24 at the corresponding position, causing the alarm 3 to sound an alarm.

[0041] It should also be noted that the bottom of the movable plate 21 is located higher than the bottom edge of the folded edge 9, so that when the closing cover 4 is installed on the refueling valve body 1 through the folded edge 9, the folded edge 9 will first dock with the refueling valve body 1, and the movable plate 21 cannot contact the annular mounting groove 23 to accidentally trigger the pressure sensor 24, and when the folded edge 9 is fully matched and docked with the refueling valve body 1, the movable plate 21 cannot deflect in position, thereby avoiding accidental triggering of the alarm.

[0042] In some specific embodiments, in combination Figure 3 and Figure 4 As shown, one end of the keyhole of the mechanical lock mechanism passes through the closing cover 4, and a sleeve 10 is provided on the closing cover 4, and the sleeve 10 is slidably matched with the closing cover 4, one end of the sleeve 10 is in the cavity 16, and the unlocking end of the mechanical lock mechanism is in the sleeve 10, and under normal conditions, the sleeve 10 is higher than the unlocking position of the mechanical lock structure, and the end of the sleeve 10 in the cavity 16 is turned outward to limit the sleeve 10 from falling off the closing cover 4, and a compressible supporting spring 18 is fixedly connected between the end of the sleeve 10 in the cavity 16 and the support plate 17, and a plurality of traction wires 19 are circumferentially connected to the end of the sleeve 10 in the cavity 16, and the ends of each traction wire 19 are respectively connected to the top of the corresponding movable plate 21, and a plurality of groups of steering fixed pulleys 26 cooperating with the traction wires 19 are also distributed on the inner wall of the cavity 16.

[0043] When the user normally opens the mechanical lock mechanism to refuel, the mechanical lock mechanism is equipped with an extended key 36, which is convenient for directly passing it into the sleeve 10, and then inserting it into the keyhole on the mechanical lock mechanism, and then unlocking and twisting it. When criminals intend to destroy the mechanical lock mechanism, since the initial position of the top of the sleeve 10 is higher than the mechanical lock mechanism, the mechanical lock mechanism is hidden inside the sleeve 10, and the sleeve 10 can be slidably received in the closing cover 4, it is easy to induce the vandal to press the sleeve 10 or squeeze the sleeve 10 to slide down when using tools to pry the lock. In this process, the sleeve 10 sliding into the closing cover 4 pulls all the traction wires 19, and each traction wire 19 pulls the corresponding movable plate 21 to deflect under the steering action of the corresponding steering fixed pulley 26, thereby squeezing the corresponding pressure sensor 24, so that the alarm 3 is triggered.

[0044] In some specific embodiments, such as Figure 3As shown, the mechanical lock mechanism includes a lock body 11, a rotary lock core 12 and a lock tongue 35. The lock body 11 is fixedly arranged on the closing cover 4, and the lock body 11 passes through the support plate 17. The rotary lock core 12 is rotatably arranged in the lock body 11. A locking piece is arranged between the rotary lock core 12 and the inside of the lock body 11. The lock can only be unlocked by a matching extended key 36. A key hole is arranged at one end of the rotary lock core 12 facing the outside of the closing cover 4. After the matching extended key 36 is inserted into the key hole, the rotary lock core 12 can be driven to rotate to unlock the lock. The rotary lock core 12 is rotated to unlock the lock. The center position of the closing cover 4 is eccentrically arranged, one end of the rotating lock core 12 passes through the lock body 11 and is fixedly connected to the lock tongue 35, the lock tongue 35 and the rotating lock core 12 are vertically distributed, and an arc lock groove 15 matching the lock tongue 35 is provided on the inner wall of the refueling valve body 1. After the closing cover 4 is docked to the refueling valve body 1, the rotating lock core 12 is driven to rotate by the extended key 36, and the rotating lock core 12 drives the lock tongue 35 to rotate, so that the end of the lock tongue 35 rotates and is stuck in the arc lock groove 15, so that the closing cover 4 cannot be separated from the refueling valve body 1.

[0045] In some specific embodiments, in combination Figure 4 and Figure 5 As shown, the blocking assembly mechanism includes a blocking block 8 matched with the inner side of the refueling valve body 1, and a linkage clamping member matched with the rotary lock core 12. A positioning ring 7 for supporting the positioning blocking block 8 is fixedly arranged on the inner wall of the refueling valve body 1. After the blocking block 8 is placed inside the refueling valve body 1, its outer wall fits with the inner wall of the refueling valve body 1, and the bottom is supported by the positioning ring 7. The upper surface is flat and smooth. Notches 27 are provided on both sides of the top of the blocking block 8, and an elastic blocking member is arranged inside the notch 27. The clamping end of the linkage clamping member is inserted into the notch 27 and compresses the elastic blocking member. The linkage clamping member rotates and unlocks with the rotary lock core 12 to clamp the blocking block 8.

[0046] Among them, the linkage clamping part includes a driving gear 14, a rack 13 and a clamping block 28. The driving gear 14 is coaxially fixedly connected to the rotating lock cylinder 12. Two clamping blocks 28 are provided and are distributed on both sides below the support plate 17. A connecting guide rod 33 is fixedly connected to each clamping block 28. Guide sleeves 34 are fixedly connected to both sides of the bottom surface of the support plate 17. The connecting guide rod 33 slides through the guide sleeve 34. Two racks 13 are provided and are fixedly connected to the connecting guide rod 33 respectively. The two racks 13 are meshed with both sides of the driving gear 14.

[0047] When the closing cover 4 is covered on the refueling valve body 1, the two clamping blocks 28 are respectively inserted into the notches 27 on both sides of the blocking block 8 and compress the elastic blocking member. When the extended key 36 is normally used to unlock, the rotary lock cylinder 12 rotates, thereby driving the driving gear 14 to rotate, and the driving gear 14 causes the racks 13 on both sides to move toward the middle. The two racks 13 drive the docking clamping blocks 28 to clamp the blocking block 8 through the corresponding connecting guide rods 33. Figures 8 to 9 As shown, when the closing cover 4 is removed, the blocking block 8 can be driven out together with it to achieve full opening for refueling. If the closing cover 4 is not opened normally by the extended key 36 and is violently removed by criminals, the blocking block 8 is not convenient to be taken out together with the removed closing cover 4 because the clamping block 28 does not clamp the blocking block 8. When the closing cover 4 is removed, it drives the clamping block 28 to disengage from the notch 27, and the elastic blocking piece in the notch 27 is elastically reset to close the notch 27. Since the blocking block 8 is fully fitted in the refueling valve body 1, it is not convenient for criminals to find the point of action to take out the blocking block 8.

[0048] In order to facilitate the clamping block 28 to effectively clamp the blocking block 8, the clamping block 28 is provided with convex teeth 32, and the inner wall of the notch 27 is provided with tooth grooves 31 that match the convex teeth 32. When the clamping block 28 clamps the blocking block 8, the convex teeth 32 can be embedded in the tooth grooves 31 to achieve biting.

[0049] The elastic plugging member includes a filling slider 29 and a connecting spring 30. The filling slider 29 is slidably arranged in the notch 27. The filling slider 29 and the notch 27 are connected by a compressible connecting spring 30. When the closing cover 4 is sealed on the refueling valve body 1, the clamping block 28 is inserted into the notch 27 and abuts against the filling slider 29. At this time, the connecting spring 30 is in a compressed state. Figure 4 As shown, when the closing cover 4 is damaged and separated from the refueling valve body 1, the clamping block 28 is disengaged from the notch 27, and the filling slider 29 rises and resets under the action of the rebound force of the connecting spring 30, and the port near the upper side of the notch 27 is flatly blocked. In this way, after the lawless elements pry open the closing cover 4, they cannot quickly remove the blocking block 8, thereby enhancing the anti-theft effect.

[0050] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0051] When the closing cover 4 is locked on the refueling valve body 1, the bottom of the distributed movable plate 21 is inserted into the annular mounting groove 23 and aligned with the pressure sensor 24, and then locked by a mechanical locking mechanism. When criminals want to pry open the closing cover 4 directly, it is easy to choose to pry it from the position of the folded edge 9 with an instrument. In this process, the position where the closing cover 4 is pried will be deformed, which will naturally cause the movable plate 21 at the corresponding position to deflect along with the deformation position, thereby contacting the pressure sensor 24 at the corresponding position, causing the alarm 3 to sound an alarm, and at the same time the camera 5 is started to take pictures, which is convenient for evidence collection.

[0052] When criminals intend to destroy the mechanical lock mechanism to open the cover, since the initial position of the top of the sleeve 10 is higher than the mechanical lock mechanism, the mechanical lock mechanism is hidden inside the sleeve 10. In addition, the sleeve 10 can be slid into the closed cover 4, it is easy to induce the vandal to press the sleeve 10 down or squeeze the sleeve 10 to slide down when using a tool to pry the lock. During this process, the sleeve 10 sliding into the closed cover 4 pulls all the traction wires 19. Each traction wire 19 pulls the corresponding movable plate 21 to deflect under the steering action of the corresponding steering fixed pulley 26, thereby squeezing the corresponding pressure sensor 24, causing the alarm 3 to be triggered.

[0053] Even if criminals violently remove the closing cover 4, when the closing cover 4 is removed, since the clamping block 28 arranged under the closing cover 4 does not clamp the blocking block 8 at this time, it is not convenient to take out the blocking block 8 together with the removed closing cover 4. When the closing cover 4 is removed, it drives the clamping block 28 to disengage from the notch 27, and the elastic blocking member in the notch 27 is elastically reset to close the notch 27. Since the blocking block 8 is fully fitted in the refueling valve body 1, it is not convenient for criminals to find the point of action to take out the blocking block 8, thereby enhancing the anti-theft effect.

[0054] When the driver needs to open the fuel tank body 2 normally for refueling, he directly inserts the extended key 36 into the rotary lock cylinder 12 to drive the rotary lock cylinder 12 to rotate and unlock. During the rotation of the rotary lock cylinder 12, the driving gear 14 is driven to rotate, and the driving gear 14 makes the racks 13 on both sides move toward the middle. The two racks 13 respectively drive the docking clamping blocks 28 through the corresponding connecting guide rods 33 to clamp the blocking block 8. In this way, when the closing cover 4 is removed, the blocking block 8 can be driven to separate together to achieve full opening. After refueling is completed, the closing cover 4 is covered on the refueling valve body 1 again. At this time, the blocking block 8 synchronously enters the refueling valve body 1, and the rotary lock cylinder 12 is operated to reverse, driving the lock tongue 35 and the arc lock groove 15 to complete the locking. At this time, the clamping block 28 is separated from the blocking block 8 and becomes a separated state, ensuring that the blocking block 8 will be in a connected state with the closing cover 4 only when normally unlocked.

[0055] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multifunctional anti-theft valve for a vehicle fuel tank, comprising a fuel filling valve body (1), the top of the fuel filling valve body (1) is provided with a closing cover (4), characterized in that: Also includes: A mechanical lock mechanism for locking the closing cover (4); the mechanical lock mechanism is arranged on the closing cover (4), and an arc lock groove (15) matching with the mechanical lock mechanism is arranged on the inner wall of the refueling valve body (1); An alarm mechanism and a blocking assembly mechanism, wherein the alarm mechanism is arranged between a closing cover (4) and a refueling valve body (1); the blocking assembly mechanism is arranged inside the refueling valve body (1); when the mechanical lock mechanism is unlocked, the closing cover (4) is connected to the blocking assembly mechanism; when the mechanical lock mechanism is locked, the closing cover (4) is separated from the blocking assembly mechanism.

2. The multifunctional anti-theft valve for automobile fuel tank according to claim 1, characterized in that: The closure cover (4) comprises a folded edge (9) for wrapping the top of the refueling valve body (1), and the folded edge (9) is an annular body.

3. The multifunctional anti-theft valve for automobile fuel tank according to claim 2, characterized in that: The alarm mechanism comprises a pressure sensor (24), an alarm (3), an annular mounting groove (23), and a movable plate (21) for squeezing the pressure sensor (24); the annular mounting groove (23) is opened at the top edge of the refueling valve body (1); a plurality of pressure sensors (24) are arranged and are equidistantly distributed on the inner wall of the annular mounting groove (23) in the circumferential direction; each of the pressure sensors (24) is electrically connected to the alarm (3); a support plate (17) is fixedly arranged on the inner side of the closing cover (4); the support plate (17) is connected to the closing cover (4) and the sealing cover (4 ... inner wall of the annular mounting groove (23) and the pressure sensor (24) is arranged on the inner wall of the annular mounting groove (23) and the pressure sensor (24) is electrically connected to the A cavity (16) is provided between the closed covers (4), a plurality of movable plates (21) are provided and are evenly spaced around the support plate (17), a plurality of shaft frames (22) are evenly spaced circumferentially provided on the inner wall of the folded edge (9), and the movable plates (21), the shaft frames (22), and the pressure sensors (24) are distributed correspondingly to each other, each of the movable plates (21) is rotatably connected to the corresponding shaft frame (22) via a rotating shaft, and a positioning spring (25) for clamping and positioning the movable plate (21) is fixedly connected to the folded edge (9) and the support plate (17).

4. The multifunctional anti-theft valve for automobile fuel tank according to claim 3, characterized in that: A camera (5) electrically connected to the pressure sensor (24) is also fixedly arranged on the outer side of the refueling valve body (1).

5. The multifunctional anti-theft valve for automobile fuel tank according to claim 3, characterized in that: The bottom of the movable plate (21) is located at a position higher than the bottom edge of the folded edge (9).

6. The multifunctional anti-theft valve for automobile fuel tank according to claim 3, characterized in that: A sleeve (10) is provided through the closure cover (4), and the sleeve (10) and the closure cover (4) are slidably matched, one end of the sleeve (10) is in the cavity (16), one end of the mechanical lock mechanism is in the sleeve (10), a support spring (18) is fixedly connected between the end of the sleeve (10) in the cavity (16) and the support plate (17), the end of the sleeve (10) in the cavity (16) is also circumferentially connected to a plurality of traction steel wires (19), and the end of each traction steel wire (19) is respectively connected to the top of the corresponding movable plate (21), and a plurality of groups of steering fixed pulleys (26) matched with the traction steel wires (19) are distributed on the inner wall of the cavity (16).

7. The multifunctional anti-theft valve for automobile fuel tank according to claim 3, characterized in that: The mechanical lock mechanism comprises a lock body (11), a rotary lock core (12) and a lock tongue (35); the lock body (11) is fixedly arranged on the closing cover (4), and the lock body (11) passes through the supporting plate (17); the rotary lock core (12) is rotatably arranged in the lock body (11); one end of the rotary lock core (12) passes through the lock body (11) and is fixedly connected to the lock tongue (35); and the arc lock groove (15) matches the lock tongue (35).

8. The multifunctional anti-theft valve for automobile fuel tank according to claim 7, characterized in that: The blocking assembly mechanism comprises a blocking block (8) matched with the inner side of the refueling valve body (1) and a linkage clamping member matched with the rotary lock core (12); a positioning ring (7) for supporting the positioning blocking block (8) is fixedly arranged on the inner wall of the refueling valve body (1); notches (27) are provided on both sides of the top of the blocking block (8); an elastic blocking member is arranged inside the notch (27); a clamping end of the linkage clamping member is inserted into the notch (27) and compresses the elastic blocking member; the linkage clamping member is rotated and unlocked as the rotary lock core (12) rotates to clamp the blocking block (8).

9. The multifunctional anti-theft valve for automobile fuel tank according to claim 8, characterized in that: The linkage clamping member comprises a driving gear (14), a rack (13) and a clamping block (28); the driving gear (14) is coaxially fixedly connected to the rotating lock core (12); two clamping blocks (28) are provided and are distributed on both sides below the support plate (17); a connecting guide rod (33) is fixedly connected to each clamping block (28); guide sleeves (34) are fixedly connected to both sides of the bottom surface of the support plate (17); the connecting guide rod (33) slides through the guide sleeve (34); two racks (13) are provided and are respectively fixedly connected to the connecting guide rod (33); the two racks (13) are meshed with both sides of the driving gear (14).

10. The multifunctional anti-theft valve for automobile fuel tank according to claim 8, characterized in that: The elastic blocking member comprises a filling slider (29) and a connecting spring (30); the filling slider (29) is slidably arranged in the notch (27); and the filling slider (29) and the notch (27) are connected via the connecting spring (30).

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