A motorcycle fuel tank lock

Abstract

The present invention belongs to the field of motorcycle fuel tank locks, and particularly relates to a motorcycle fuel tank lock, which comprises a fuel tank, a housing, cylinder A, a chute, a guide sleeve, cylinder B, a ring sleeve, a ring plate, an internal thread sleeve, a stud, a circular plate, a lock core, a lock tongue, a plug, a rubber pad, a lock cover, a slide rod, a return spring, and a pull rope. The fuel tank is externally covered with a housing having a drainage gap therewith; the oil inlet at the top of the fuel tank and the circular groove A at the top of the housing are coaxial; a cylinder A is provided at the circular groove A, and the cylinder A communicates the circular groove A with the oil inlet through a cylinder B bent uniformly along the circumferential direction. When the motorcycle key is damaged or lost, the present invention can unlock by removing the fuel tank as a whole from the motorcycle and reciprocally pulling one end of the pull rope to drive the slide rod to push the lock tongue on the lock core into the lock core. This operation method can, on the one hand, avoid using tools to pry the lock and generate debris to contaminate the fuel tank, and on the other hand, prevent oil thieves from easily opening the fuel tank to steal oil.

Description

Technical Field

[0001] The present invention belongs to the field of motorcycle fuel tank locks, and particularly relates to a motorcycle fuel tank lock. Background Art

[0002] The fuel tank lock of a motorcycle can lock the fuel tank cap, prevent the fuel in the fuel tank from being stolen, and has the functions of waterproofing and dustproofing.

[0003] The following problems still exist in the existing motorcycle fuel tank locks during use:

[0004] 1. The drain holes on the fuel tank will fail during heavy rain due to blockage, allowing water to enter the fuel tank.

[0005] 2. When the key of the fuel tank lock is damaged or lost, the debris generated during the process of prying open the fuel tank lock with tools is likely to enter the fuel tank, affecting the subsequent normal use of the fuel tank.

[0006] 3. The vent holes on the fuel tank exist independently of the waterproof and dustproof holes. They are relatively concealed and are prone to oil leakage or water ingress when the motorcycle rolls over or during heavy rain, resulting in the motorcycle stalling due to lack of fuel or water ingress.

[0007] 4. The existing ordinary motorcycle fuel tanks do not have the function of preventing fuel theft. <7000016>

[0008] The present invention designs a motorcycle fuel tank lock to solve the above problems. Summary of the Invention

[0009] To solve the defects in the prior art, the present invention discloses a motorcycle fuel tank lock, which is implemented by the following technical solutions.

[0010] A motorcycle fuel tank lock includes a fuel tank, a housing, cylinder A, a chute, a guide sleeve, cylinder B, a ring sleeve, a ring plate, an internal thread sleeve, a stud, a round plate, a lock core, a lock tongue, a plug, a rubber pad, a lock cover, a slide rod, a return spring, and a pull rope. The fuel tank is externally covered with a housing having a drainage gap therewith; the oil inlet at the top of the fuel tank and the circular groove A at the top of the housing are concentric on the axis; there is a cylinder A at the circular groove A, and the cylinder A communicates the circular groove A with the oil inlet through a cylinder B bent uniformly in the circumferential direction; a ring sleeve is embedded and installed in the circular groove A, and the flange outside the upper end of the ring sleeve is installed in the annular groove A at the circular groove A through bolts. An internal thread sleeve is installed inside the lower end of the ring sleeve through a ring plate; the internal thread of the internal thread sleeve is in threaded cooperation with a stud, and the round plate at the upper end of the stud is cooperated with the ring plate through a rubber pad; a plug for opening and closing the oil inlet is provided at the lower end of the stud, and a lock cover for opening and closing the lock hole of the lock core inside the stud is hinged in the circular groove B on the round plate. The lock tongue of the lock core is cooperated with the limiting groove on the side wall of the internal thread sleeve; a structure for cleaning all the water leakage holes at the bottom of the cylinder B is provided at the oil inlet of the fuel tank during the process of screwing the stud into or out of the internal thread sleeve; an exhaust structure for preventing oil leakage and water ingress is provided on the plug.

[0011] A sliding sleeve is horizontally slidable in the guide sleeve at the side wall chute of the cylinder A, and a spring C for resetting the sliding sleeve is installed. A sliding rod that cooperates with the limiting groove on the internal thread sleeve and the lock tongue of the lock core is vertically slidable in the guide sleeve on the inner wall of the cylinder A, and a return spring for resetting the sliding rod is installed. The pulling rope at the end of the sliding rod passes through the gap between the outer shell and the fuel tank and is hooked on the round pin on the inner wall of the installation groove in the middle of the lower end of the fuel tank.

[0012] As a further improvement of the present technology, a ring is rotatably fitted at the oil inlet, and a volute spring for rotating and resetting the ring is installed between the ring and the oil inlet. Several L-shaped rods that are circumferentially and evenly distributed and correspond to the lower end toggle rods of the stud one by one are hinged at the upper end of the ring, and two leaf springs for swinging and resetting the L-shaped rods are installed between each L-shaped rod and the ring. Several rod A are circumferentially and evenly distributed on the outer side wall of the ring, and each rod A has two arc-shaped rod B that are concentric with the ring and cooperate with the corresponding two water leakage holes at the lower end of the cylinder B.

[0013] As a further improvement of the present technology, an air groove A is provided at the lower end of the plug, and the air groove A communicates with the air groove B on the side wall of the plug. A thin film that closes the lower end of the ring groove B under the action of water inlet and closes the upper end of the ring groove B under the action of external oil leakage is installed in the ring groove B on the inner wall of the air groove A.

[0014] As a further improvement of the present technology, a round rod is installed in the ring groove B through a fixing rod, the thin film is nested on the round rod, and two clamping rings that clamp the thin film through nuts screwed with the round rod are nested on the round rod. A cover for preventing water from entering the air groove B is installed at the lower end of the stud.

[0015] As a further improvement of the present technology, an oil outlet is provided at the bottom of the installation groove of the fuel tank; a structure for pumping oil towards the oil outlet is provided in the fuel tank.

[0016] As a further improvement of the present technology, an installation plate for fixing it to the motorcycle body by bolts is provided at the rear end of the fuel tank; the outer shell and the fuel tank are connected by several connecting strips that communicate the gap between the fuel tank and the outer shell with the outside air.

[0017] As a further improvement of the present technology, the ring plate is connected to three supporting ears on the inner wall of the cylinder A by bolts.

[0018] As a further improvement of the present technology, a perforated pulling block is installed at the end of the pulling rope, the pulling block cooperates with the round pin and is fixed on the round pin by a nut screwed with the round pin; a pulley is provided at each turning point of the pulling rope.

[0019] Compared with the traditional motorcycle fuel tank lock, the water leakage holes on the cylinder B of the present invention will be cleaned during the process of screwing the stud in or out, thus avoiding the problem of water entering the fuel tank caused by the blockage of the water leakage holes.

[0020] When the motorcycle key is broken or lost, in the present invention, by removing the fuel tank as a whole from the motorcycle and loosening one end of the pull rope to pull it reciprocally, the slide rod can be driven to push the lock tongue on the lock core into the lock core, thus achieving unlocking. This operation method, on the one hand, avoids using tools to pry the lock and generating debris to pollute the fuel tank, and on the other hand, can prevent oil thieves from easily opening the fuel tank to steal oil.

[0021] In the present invention, the air grooves A and B on the plug will be closed by the film when water enters the fuel tank or there is external leakage in the fuel tank, thus achieving an effective function of preventing water ingress and oil leakage. The structure of the present invention is simple and has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the whole of the present invention.

[0023] Figure 2 is a schematic cross-sectional view of the whole of the present invention.

[0024] Figure 3 is a schematic cross-sectional view of the cooperation between the outer shell, the internal thread sleeve, the stud, the plug and the fuel inlet of the fuel tank.

[0025] Figure 4 is a schematic cross-sectional view of the internal structure of the plug.

[0026] Figure 5 is a schematic cross-sectional view of the cooperation between rod A, rod B and the water leakage holes on the cylinder B.

[0027] Figure 6 is a schematic cross-sectional view of the fuel tank anti-collision structure.

[0028] Figure 7 are two schematic cross-sectional views of the cooperation between the slide rod and the lock tongue and its transmission.

[0029] Figure 8 is a schematic cross-sectional view of the cooperation between the outer shell and the fuel tank.

[0030] Figure 9 is a schematic diagram of the cylinder B.

[0031] Figure 10 is a schematic cross-sectional view of the cooperation between the flange, the ring sleeve, the ring plate and the internal thread sleeve.

[0032] Figure 11 is a schematic cross-sectional view of the cooperation between the circular plate, the stud, the lock core and the plug and its cross-section.

[0033] Figure 12 is a schematic cross-sectional view of the cooperation between the ring, the L-shaped rod, rod A and rod B and its cross-section.

[0034] Names of the reference numerals in the figure: 1, fuel tank; 2, installation groove; 3, oil inlet; 4, trapezoidal guide groove; 5, connecting bar; 6, outer shell; 7, annular groove A; 8, cylinder A; 9, sliding groove; 10, guide sleeve; 11, ear; 12, cylinder B; 13, water leakage hole; 14, ring; 15, trapezoidal guide ring; 16, scroll spring; 17, L-shaped rod; 18, leaf spring; 19, rod A; 20, rod B; 21, ring sleeve; 22, flange; 23, ring plate; 24, internal thread sleeve; 25, limiting groove; 26, stud; 27, circular plate; 28, circular groove B; 29, lock core; 30, lock tongue; 31, plug; 32, air groove A; 33, annular groove B; 34, air groove B; 35, cylinder C; 36, lever; 37, bolt; 38, rubber pad; 39, lock cover; 40, fixing rod; 41, round rod; 42, film; 43, clamping ring; 44, nut; 45, sliding rod; 46, return spring; 47, compression spring ring; 48, pull rope; 49, pulley; 50, pulling block; 51, round pin; 54, mounting plate; 55, circular groove A; 56, annular groove C. Detailed implementation manners

[0035] The attached drawings are all schematic diagrams of the implementation of the present invention for facilitating the understanding of the structural operation principle. The specific product structure and proportional dimensions can be determined according to the use environment in combination with conventional technologies.

[0036] As Figure 3 、 6 、7 shows, it includes a fuel tank 1, an outer shell 6, a cylinder A 8, a sliding groove 9, a guide sleeve 10, a cylinder B 12, a ring sleeve 21, a ring plate 23, an internal thread sleeve 24, a stud 26, a circular plate 27, a lock core 29, a lock tongue 30, a plug 31, a rubber pad 38, a lock cover 39, a sliding rod 45, a return spring 46, and a pull rope 48. Among them, as Figure 1 、 2 、8 shows, the fuel tank 1 is externally covered with an outer shell 6 having a drainage gap therewith; the oil inlet 3 at the top of the fuel tank 1 and the circular groove A 55 at the top of the outer shell 6 are concentric on the axis; as Figure 3 、 7 、9 shows, there is a cylinder A 8 at the circular groove A 55, and the cylinder A 8 communicates the circular groove A 55 with the oil inlet 3 through a cylinder B 12 uniformly bent in the circumferential direction; as Figure 3 、 8 、10 shows, a ring sleeve 21 is embedded and installed in the circular groove A 55. The flange 22 outside the upper end of the ring sleeve 21 is installed in the annular groove A 7 at the circular groove A 55 through a bolt 37, and an internal thread sleeve 24 is installed inside the lower end of the ring sleeve 21 through a ring plate 23; as Figure 3 、 7, as shown in FIGS. 11, a stud 26 is in threaded fit with an internal thread sleeve 24, and a circular plate 27 at the upper end of the stud 26 is fitted with a ring plate 23 through a rubber pad 38; a plug 31 for opening and closing the oil inlet 3 is provided at the lower end of the stud 26, and a lock cover 39 for opening and closing the lock hole of the lock core 29 in the stud 26 is hinged in a circular groove B28 on the circular plate 27; as Figure 7 , 10 , as shown in FIGS. 11, the lock tongue 30 of the lock core 29 is fitted with a limit groove 25 on the side wall of the internal thread sleeve 24; as Figure 3 , 5 , as shown in FIGS. 7, a structure for cleaning all the water leakage holes 13 at the bottom of the cylinder B12 is provided at the oil inlet 3 of the fuel tank 1 during the process of screwing the stud 26 into or out of the internal thread sleeve 24; as Figure 4 , 7 shown, an exhaust structure for preventing oil leakage and water ingress is provided on the plug 31.

[0037] As Figure 7 , 8 shown, a sliding sleeve slides horizontally in a guide sleeve 10 at a chute 9 on the side wall of the cylinder A8 and a spring C for resetting the sliding sleeve is installed, and a sliding rod 45 which is in fit with the limit groove 25 on the internal thread sleeve 24 and the lock tongue 30 of the lock core 29 slides vertically in the guide sleeve 10 on the inner wall of the cylinder A8 and a return spring 46 for resetting the sliding rod 45 is installed; a pull rope 48 at the end of the sliding rod 45 passes through the gap between the housing 6 and the fuel tank 1 and is hooked on a round pin 51 on the inner wall of the middle part of the installation groove 2 at the lower end of the fuel tank 1.

[0038] As Figure 3 , 5 , as shown in FIGS. 12, a ring 14 is rotatably fitted at the oil inlet 3, a scroll spring 16 for rotating and resetting the ring 14 is installed between the ring 14 and the oil inlet 3; several L-shaped rods 17 which are circumferentially and evenly distributed and are in one-to-one correspondence with the lower end toggle rods 36 of the stud 26 are hinged at the upper end of the ring 14, and two leaf springs 18 for swinging and resetting the L-shaped rods 17 are installed between each L-shaped rod 17 and the ring 14; several rod A19 are circumferentially and evenly distributed on the outer side wall of the ring 14, and two arc-shaped rods B20 which are concentric with the ring 14 and are in fit with two corresponding water leakage holes 13 at the lower end of the cylinder B12 are provided on each rod A19.

[0039] As Figure 3 , 4 , as shown in FIGS. 11, an air groove A32 is provided at the lower end of the plug 31, and the air groove A32 is communicated with an air groove B34 on the side wall of the plug 31; a thin film 42 which closes the lower end of the ring groove B33 under the action of water ingress and closes the upper end of the ring groove B33 under the action of external oil leakage is installed in a ring groove B33 on the inner wall of the air groove A32.

[0040] As Figure 3 , 4As shown, a round rod 41 is installed in the annular groove B33 through a fixing rod 40, a thin film 42 is nested on the round rod 41, and two clamping rings 43 that clamp the thin film 42 are nested on the round rod 41 through nuts 44 screwed thereon; a cover for preventing water from entering the air groove B34 is installed at the lower end of the stud 26.

[0041] As Figure 1 , 2 shown, an oil outlet is provided at the bottom of the installation groove 2 of the fuel tank 1; a structure for pumping oil towards the oil outlet is provided in the fuel tank 1.

[0042] As Figure 1 , 2 shown, a mounting plate 54 for fixing it to the motorcycle body is provided at the rear end of the fuel tank 1 through bolts 37; the outer shell 6 and the fuel tank 1 are connected by a number of connecting strips 5 that communicate the gap between the fuel tank 1 and the outer shell 6 with the outside air.

[0043] As Figure 3 , 8 shown, the annular plate 23 is connected to three lugs 11 on the inner wall of the cylinder A8 through bolts 37.

[0044] As Figure 7 shown, a perforated pull block 50 is installed at the end of the pull rope 48, the pull block 50 is fitted with a round pin 51 and fixed to the round pin 51 through a nut 44 threadedly fitted with the round pin 51; a pulley 49 is fitted at each turning point of the pull rope 48.

[0045] As Figure 7 shown, the return spring 46 is located in the annular groove C56 on the inner wall of the guide sleeve 10, and the return spring 46 is a compression spring. One end of the return spring 46 is connected to the inner wall of the annular groove C56, and the other end is connected to the compression spring ring 47 on the slide rod 45.

[0046] As Figure 3 , 8 shown in FIGS. 11 and 12, a trapezoidal guide ring 15 is provided on the ring 14, and the terrain guide ring rotates in the annular trapezoidal guide groove 4 at the oil inlet 3 of the fuel tank 1.

[0047] The working process of the present invention: In the initial state, the water leakage hole 13 at the bottom of the cylinder B12 is in an open state, the thin film 42 is in a communicating state with the air groove A32, the lock tongue 30 of the lock core 29 is inserted into the limit groove 25 of the inner thread sleeve 24, the plug 31 is in a closed state for the oil inlet 3, and the return spring 46 is in a compressed state.

[0048] When water enters the position between the oil inlet 3 and the cylinder B12, the water will be discharged through the open water leakage hole 13, so as to achieve the waterproof effect, and the water will not accumulate in the outer shell 6.

[0049] When it is necessary to open the oil inlet 3 to refuel the fuel tank 1, first retract the lock tongue 30 into the lock core 29 with a key, and then rotate the circular plate 27 with a matching tool. The circular plate 27 drives the stud 26 to rotate away from the internal threaded sleeve 24. During the process of the stud 26 rotating away from the internal threaded sleeve 24, the internal threaded sleeve 24 drives the corresponding L rod 17 on the ring 14 through the shift rod 36 at its lower end. The L rod 17 drives the ring 14 to rotate. The ring 14 drives the two rods B20 on the rod A19 to rotate synchronously through the rod A19. A rod B20 on each rod A19 is inserted into a water leakage hole 13 on the cylinder B12 to clean the water leakage hole 13.

[0050] When rod B20 is fully inserted into leak hole 13 and reaches its limit, ring 14 stops rotating. As stud 26 continues to rotate, L-rod 17, driven by lever 36, swings. The two leaf springs 18 that return L-rod 17 to its original position deform accordingly. When lever 36 passes over L-rod 17, L-rod 17 instantly swings back to its original position, driven by the return action of the two leaf springs 18.

[0051] The L rod 17 is reciprocated by the shifting rod 36 as the stud 26 is rotated away from the internal threaded sleeve 24 and instantly swings back to its original position when the shifting rod 36 is disengaged.

[0052] When the oil tank 1 is filled with oil using a special oil filling tool, the stud 26 is screwed back into the internal threaded sleeve 24 to close the oil inlet 3 .

[0053] As the stud 26 is screwed into the internal threaded sleeve 24, the plug 31 gradually closes the oil inlet 3, and the lever 36 on the plug 31 drives the ring 14 to rotate and reset through the L rod 17. The ring 14 drives one rod B20 on the rod A19 to disengage from the corresponding water leakage hole 13 through the rod A19, and the other rod B20 enters the water leakage hole 13 on the other side and cleans the water leakage hole 13.

[0054] When rod B20 is fully inserted into leak hole 13 and reaches its limit, ring 14 stops rotating. As stud 26 continues to rotate, L-rod 17, driven by lever 36, swings. The two leaf springs 18 that return L-rod 17 to its original position deform accordingly. When lever 36 passes over L-rod 17, L-rod 17 instantly swings back to its original position, driven by the return action of the two leaf springs 18.

[0055] When the plug 31 seals and closes the oil inlet 3 , the circular plate 27 is in a compression state against the rubber pad 38 .

[0056] When the motorcycle rolls over, the oil in the fuel tank 1 enters the air groove A32 and pushes the film 42 to close the air groove A32, thereby preventing the oil in the fuel tank 1 from leaking.

[0057] When a large amount of water enters the space between the housing 6 and the fuel tank 1 , the water enters the air groove A32 through the air groove B34 and pushes the film 42 to close the air groove A32 , thereby preventing the water from entering the fuel tank 1 .

[0058] When someone steals oil, the bolts 37 between the flange 22 and the housing 6 are removed to disassemble the ring sleeve 21 and the plug 31 as a whole. Since the sliding rod 45 is inserted into the limiting groove 25 on the side wall of the internal threaded sleeve 24, the ring sleeve 21 and the plug 31 are prevented from being separated from the housing 6, thereby preventing the oil thief from stealing the oil.

[0059] When the car key is lost or damaged, it is impossible to disassemble the ring sleeve 21 and the plug 31 as a whole by removing the bolts 37 between the flange 22 and the housing 6. Therefore, the fuel tank 1 is removed from the motorcycle as a whole using tools. After the fuel tank 1 is removed from the motorcycle, the nut 44 on the round pin 51 is unscrewed and the pull block 50 is removed from the round pin 51, the pull rope 48 is released, and the slide rod 45 hits the lock tongue 30 of the lock core 29 under the action of the return spring 46 and causes the lock tongue 30 to be knocked into the lock core 29 and disengage from the limit groove 25. Then the circular plate 27 is rotated, and the circular plate 27 drives the stud 26 to rotate away from the internal threaded sleeve 24, thereby realizing the opening of the oil inlet 3.

[0060] In summary, the beneficial effects of the present invention are as follows: the leakage hole 13 on the cylinder B12 of the present invention will be cleaned during the process of screwing the stud 26 in or out, thereby avoiding the problem of water entering the oil tank 1 due to blockage 31 of the leakage hole 13.

[0061] When the motorcycle key is broken or lost, the fuel tank 1 is completely removed from the motorcycle and one end of the pull rope 48 is loosened and pulled back and forth to drive the slide bar 45 to push the lock tongue 30 on the lock cylinder 29 into the lock cylinder 29, thereby unlocking the motorcycle. This operation method can not only avoid the use of tools to pry the lock to generate debris and contaminate the fuel tank 1, but also prevent fuel thieves from easily opening the fuel tank 1 to steal fuel.

[0062] The air grooves A32 and B34 on the plug 31 of the present invention will be closed by the film 42 when water enters the oil tank 1 or the oil tank 1 leaks from the outside, thereby achieving the effective function of preventing water ingress and oil leakage.

Claims

1. A motorcycle fuel tank lock, characterized in that: It includes a fuel tank, a housing, cylinder A, a chute, a guide sleeve, cylinder B, a collar, a ring plate, an internal thread sleeve, a stud, a circular plate, a lock core, a lock tongue, a plug, a rubber gasket, a lock cover, a slide bar, a return spring, and a pull rope. The fuel tank is externally covered with a housing having a drainage gap therewith; the oil inlet at the top of the fuel tank and the circular groove A at the top of the housing are on the same central axis; there is a cylinder A at the circular groove A, and the cylinder A communicates the circular groove A with the oil inlet through a cylinder B bent uniformly in the circumferential direction; a collar is embedded and installed in the circular groove A, and the flange outside the upper end of the collar is installed in the annular groove A at the circular groove A through bolts, and an internal thread sleeve is installed inside the lower end of the collar through a ring plate; the internal thread of the internal thread sleeve is in threaded fit with a stud, and the circular plate at the upper end of the stud is matched with the ring plate through a rubber gasket; the lower end of the stud has a plug for opening and closing the oil inlet, and a lock cover for opening and closing the lock hole of the lock core inside the stud is hinged in the circular groove B on the circular plate, and the lock tongue of the lock core is matched with the limit groove on the side wall of the internal thread sleeve; there is a structure at the oil inlet of the fuel tank for cleaning all the water leakage holes at the bottom of the cylinder B during the process of screwing the stud into or out of the internal thread sleeve; the plug has an exhaust structure for preventing oil leakage and water ingress; A sliding sleeve slides horizontally in the guide sleeve at the chute on the side wall of the cylinder A and a spring C for resetting the sliding sleeve is installed, and a slide bar that is vertically slidable in the guide sleeve on the inner wall of the cylinder A and is matched with the limit groove on the internal thread sleeve and the lock tongue of the lock core is installed, and a return spring for resetting the slide bar is installed; the pull rope at the end of the slide bar passes through the gap between the housing and the fuel tank and is hooked on the round pin on the inner wall of the installation groove in the middle of the lower end of the fuel tank.

2. The motorcycle fuel tank lock according to claim 1, characterized in that: A ring is rotatably fitted at the oil inlet, and a torsion spring for rotating and resetting the ring is installed between the ring and the oil inlet; several L-shaped rods that are circumferentially and evenly distributed and are correspondingly matched with the lower end lever of the stud one by one are hinged at the upper end of the ring, and two leaf springs for swinging and resetting the L-shaped rods are installed between each L-shaped rod and the ring; several rod A are circumferentially and evenly distributed on the outer side wall of the ring, and each rod A has two arc-shaped rods B that are concentric with the ring and are matched with two corresponding water leakage holes at the lower end of the cylinder B.

3. A motorcycle fuel tank lock according to claim 1, characterized in that: The lower end of the plug has an air groove A, and the air groove A communicates with the air groove B on the side wall of the plug; a thin film that closes the lower end of the annular groove B under the action of water ingress and closes the upper end of the annular groove B under the action of external oil leakage is installed in the annular groove B on the inner wall of the air groove A.

4. The motorcycle fuel tank lock according to claim 3, characterized in that: A round rod is installed in the annular groove B through a fixing rod, the thin film is nested and installed on the round rod, and two clamping rings for clamping the thin film are nested on the round rod through nuts screwed with the round rod; a cover for preventing water from entering the air groove B is installed at the lower end of the stud.

5. A motorcycle fuel tank lock according to claim 1, characterized in that: The bottom of the installation groove of the fuel tank has an oil outlet; a structure for pumping oil towards the oil outlet is provided inside the fuel tank.

6. The motorcycle fuel tank lock according to claim 1, characterized in that: The rear end of the fuel tank has a mounting plate fixed to the motorcycle body through bolts; the housing and the fuel tank are connected by several connecting strips that communicate the gap between the fuel tank and the housing with the outside air.

7. A motorcycle fuel tank lock according to claim 1, characterized in that: The ring plate is connected to three lugs on the inner wall of the cylinder A through bolts.

8. A motorcycle fuel tank lock according to claim 1, characterized in that: A perforated pull block is installed at the end of the pull rope, the pull block is matched with the round pin and is fixed on the round pin through a nut that is in threaded fit with the round pin; a pulley is fitted at each turning point of the pull rope.

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