TW201336708A - Cap-lock device for oil tank - Google Patents

Abstract

The present invention relates to a cap-lock device for oil tank. The cap-lock device contains a base body fixedly disposed at the refueling nozzle of the oil tank, and an oil cap pivotally disposed on the base body. The oil cap is provided therein with a concave chamber, in which an installation chamber is disposed, the installation chamber is disposed with a first valve abutted against by a first spring and a second valve abutted against by a second spring. When the oil tank generates the attraction therein due to the negative pressure, the first valve is driven to displace, so that the air outside the oil tank can enter into the oil tank; when the oil tank generates the thrust due to the positive pressure, the first and the second valves are simultaneously driven to displace, so that the oil gas inside the oil tank can be dissipated out of the oil cap, and the pressure in the oil tank becomes slightly different from that in the exterior, the first and the second valves are tightly closed so that the fuel in the oil tank will not leak and the substance from the exterior cannot enter into the oil tank, either.

Description

Locking device for fuel tank

The invention relates to a locking device for a fuel tank, in particular to a locking device which is installed on a fueling nozzle of a fuel tank such as a steam or a locomotive for closing a fueling nozzle so that fuel or oil and gas in the fuel tank does not leak.

Generally, vehicles such as cars or locomotives are equipped with fuel tanks for storing gasoline or diesel fuel. The fuel tanks are provided with a fuel filler nozzle. Gasoline or diesel oil can be added to the fuel tank by a fuel filler nozzle. In addition, a lock device is also provided at the fuel filler nozzle of the fuel tank. The capping device comprises a body fixed around the fueling nozzle, and an oil cap detachably coupled with the seat body, the oil cap is used for sealing the fueling nozzle, so that the fuel in the fuel tank or the material outside the fuel tank is not easily Enter and exit the fuel tank.

The pressure inside the fuel tank will change depending on the environment in which the vehicle is located or the engine. In detail, for example, the vehicle is heated by the sun in the stopped state, and the internal pressure is increased due to the temperature increase. Or when the vehicle is running, the fuel tank will generate negative pressure due to the reduction of internal fuel. The negative pressure will cause suction inside the fuel tank, so the fuel is less likely to flow to the engine, and the engine oil supply is not smooth. To this end, the oil cap is usually provided with a small hole, so that the fuel tank can communicate with the outside of the fuel tank to maintain the balance between the internal pressure of the fuel tank and the external pressure, so that the fuel tank can supply oil to the engine smoothly.

In this normal state, the oil cap with the small hole will be continuously lost in the small hole of the oil tank, and when the vehicle falls over, the fuel will easily flow out from the small hole of the oil cover, resulting in a fire burning. risk.

In order to solve the problem, the present invention provides a lock device for a fuel tank including a body having a space formed inside the seat body, and the seat system is fixed at a fuel filler nozzle of the oil tank, and is detachably engaged with the seat body. An oil cap in the space, the oil cap includes an upper surface and a lower surface, and the oil cap includes an alcove extending from the upper surface toward the lower surface but spaced apart from the lower surface, the recess having a bottom surface, the recessed chamber and the bottom surface The first annular wall has a surface, and the mounting space includes a first groove extending from the surface toward the lower surface but spaced apart from the lower surface, the first groove facing away from the bottom surface of the first groove a second groove extending from the lower surface but spaced apart from the lower surface, a third groove extending from the bottom surface of the second groove toward the lower surface but spaced apart from the lower surface, and extending from the bottom end of the third groove toward the lower surface but below a fourth groove spaced apart from the surface, the fourth groove has a bottom surface, and the installation space further includes a first step formed at a boundary between the third groove and the fourth groove, and a boundary formed between the second groove and the third groove a second step surface, the oil cover further comprises a passage extending from the lower surface to the fourth slot, a vent hole is formed on the bottom surface and located outside the installation space, a slot is formed on the lower surface, and the slot is surrounded by the oil cover The surface extends to the passage, and is coupled to a gasket outside the oil cover and adjacent to the lower surface. The gasket has a flange, and the flange is detachably abutted against the end surface of the grease fitting to connect the grease fitting to the fuel tank. One of the tank passages is connected to the slot and is movably mounted The first valve is a three tank, a first valve comprising a first side and a second side surface facing the first surface of the stage; a first spring is mounted between the bottom surface of the fourth groove of the oil cap and the first valve, the first spring is oppositely biased with the first valve, and is movably mounted to a second valve in the second groove, the second The valve includes a first end surface and a second end surface facing the second step surface, the second valve further includes a through hole extending between the first and second end faces, and the second valve is movable along the second groove in the first position Displacement between the second position and a cover cover covering the surface of the first ring wall to cover the installation space, the lock cover has an upper end surface and a lower end surface, the lock cover further includes a vent hole, and a sealing ring is sealingly coupled Between the first slot and the lower end surface of the lock cover, a second spring, coupled between the lock cover and the first end surface of the second valve, elastically and biasedly holds the second valve in the first position.

When the internal pressure of the oil tank is balanced with the outside, the first valve is biased by the first spring such that the first side closely abuts against the second end surface of the second valve, and the perforation is closed, and the second valve is second The spring bias is located at the first position, the second end surface is closely abutted against the second step surface, and the third and fourth slots are closed to prevent oil and gas leakage in the fuel tank. When the suction force generated inside the oil tank is greater than the elastic force of the first spring supporting the first valve, the first valve compresses the first spring displacement to disengage the first side from the second end surface. The hole, the external air enters the fuel tank through the passage through the vent hole, the vent hole, the through hole, the third groove and the fourth groove, When the pressure generated inside the oil tank is greater than the elastic force of the second spring supporting the second valve in the first position, the second valve compresses the second spring to the second position, so that the second end surface is disengaged from the second step, and the pressure inside the tank is via The passage enters the third and fourth slots and is released to the outside through the vent holes and the vent holes.

The invention utilizes the change of the pressure of the fuel tank. When the pressure inside the oil tank is negative pressure, the generated suction force can displace the first valve, so that the air outside the oil cover enters the equilibrium pressure in the oil tank, and when the oil tank is positive pressure, the generated thrust is generated. The first and second valves can be simultaneously pushed to dissipate the oil and gas inside the fuel tank to the outside of the oil cap, and when the internal pressure of the oil tank is balanced with the outside, the first and second valves have a close function, so that when the vehicle is overturned, the fuel tank is inside The fuel is not easy to leak.

The end surface of the oil cover and the vent hole form an extension wall, and the vent hole is located in the extension wall.

The design of the venting hole and the extension wall is a physical phenomenon in which the water flows downward, so that the air outside the oil cap can easily enter the oil cap, but the moisture or impurities outside the oil cap are not easily passed through the vent hole through the extending wall. Enter the recessed chamber of the oil cover.

All of the following drawings are merely illustrative of the basic teachings of the present invention, and the number, position, relationship, and size of the elements constituting the preferred embodiments will be described in the drawings. Post-guided changes are implemented in industry skills. In addition, after reading and understanding the teachings of the present invention, changes in the exact dimensions and size ratios associated with particular strengths, weights, strengths, and the like are also within the skill of the art.

In the different figures, the same reference numerals are used to designate the same or similar elements; in addition, please refer to the text such as "first", "second", "third", "upper", "lower", "before", "after" , "inside", "outside", "end", "part", "segment", "horizontal", "vertical", "inward", "outward", "twist", "length", "zone" "," around, "side", "radial", "axial", etc. The equivalents and similar language are only for ease of reference to the figures in the drawings and are merely used to help describe the invention.

According to the embodiment shown in the drawings, the capping device 10 of the present invention is mounted on a grease fitting 319 of a fuel tank. The capping device 10 includes a body 20 having a tubular peripheral wall 22, A space 24 is defined on the inner side of the surrounding wall 22. The outer side of the surrounding wall 22 forms a U-shaped pivot portion 26. The pivot portion 26 includes a pivot groove 28, and the peripheral wall 22 is aligned with the pivot groove 28 to form a connection space. 24 and a first opening 30 of the pivoting groove 28, and an outer portion of the surrounding wall 22 is further provided with an erecting portion 32. The erecting portion 32 is spaced apart from the pivot portion 26 in the radial direction of the surrounding wall 22. The erecting portion 32 has an upper surface 34 and A lower surface 36, an active space 38 is formed on the lower surface 36 and spaced apart from the upper surface 34. The second wall 40 of the connecting space 24 and the movable space 38 is disposed at a position on the surrounding wall 22 aligned with the movable space 38. A side wall of the opening 40 defines an engaging portion 41. Further, an outer side of the surrounding wall 22 and between the pivot portion 26 and the mounting portion 32 are provided with two engaging blocks 42 for engaging with one end of the cable. Figure 6 shows the imaginary line), the other end of the cable is connected to the main vehicle (such as the locomotive) Locking joint, causing the main switch operation to pull the cable lock.

The capping device 10 further includes a top block 44 movably mounted within the movable space 38, the top block 44 having a raised portion 46, the top block 44 further including an arcuate guide channel 48, the raised portion 46 of the top block 44 Leaving toward the second opening 40, and the top block 44 is displaced along the movable space 38 between the retracted position (as shown in Figures 4 to 7) and the extended position (as shown in Figure 8), when the top block 44 is located In the retracted position, the projection 46 is located within the active space 38 and the projection 46 extends into the space 24 when the top block 44 is in the extended position.

The locking device 10 further includes an L-shaped cover 50 coupled to the lower surface 36 of the mounting portion 32. The cover 50 has a long slot 52 for covering the movable space 38 so that the top block 44 does not disengage. Activity space 38.

The capping device 10 also includes an actuating member 54 pivotally mounted on the cover plate 50. The actuating member 54 includes a first end 56 and a second end 58 and is formed. At a pivot hole 62 between the first and second ends 56, 58, the first end 56 of the actuating member 54 has a lever 60. The actuating member 54 passes through the pivot hole 62 with a bolt 64 and locks into the mounting portion 32. Inside, the actuating member 54 is pivotally coupled to the outside of the cover 50 (as shown in Figure 4). And the lever 60 extends into the guide groove 48 through the long slot 52. The long slot 52 provides a space for the lever 60 to move, and the second end 58 of the actuating member 54 provides the end connection of the cable, so when the main switch lock is operated, The steel cable action member 54 is driven such that the lever 60 urges the top block 44 to be displaced between the extended position and the retracted position.

The cover device 10 further includes an outer cover 66. The central portion of the outer cover 66 defines an opening 68. A ring wall 70 is formed under the outer cover 66. The annular wall 70 is provided with two engaging holes 72, and the outer cover 66 is sleeved. The upper end of the peripheral wall 22 of the base 20 is disposed, and the peripheral wall 22 abuts against the inner side of the annular wall 70, and each of the engaging holes 72 is engaged with an engaging block 42 to cause the opening 68 of the outer cover 66 to be aligned with the space 24.

According to the drawings, the capping device 10 includes an oil cap 74 that removably engages within the space 24 of the seat body 20. The oil cap 74 includes a first portion 76 and a second portion 84 that is smaller than the first portion 76. The oil cap 74 further includes an upper surface 78 at the end of the first portion 76, a lower surface 86 at the end of the second portion 84, and an end surface 79 at the junction of the first portion 76 and the second portion 84. The first portion 76 includes A peripheral wall 82 of the upper surface 78 and the end surface 79 is joined, and the peripheral wall 82 is gradually tapered from the upper surface 78 toward the end surface 79. The first portion 76 also includes a portion extending from the upper surface 78 toward the lower surface 86 but spaced from the end surface 79. The recess 88 has a vent hole 81 formed in the bottom surface 93 and extending to the end surface 79, so that the vent hole 81 communicates with the outside of the recess 88 and the oil cover 74, and the end surface 79 faces downward at the position corresponding to the vent hole 81. The surface 86 extends a tubular extending wall 83. The venting hole 81 is located in the extending wall 83. The first annular wall 90 and the second annular wall 131 are formed on the bottom surface 93 and extend toward the upper surface 91. And the end of the second ring wall 131 is aligned with the upper surface 91, and the first ring wall 90 A surface 91 is provided between the upper surface 78 and the bottom surface 93, and the first annular wall 90 An installation space 92 is defined in the recess 88. The second ring wall 131 partitions a movable slot 133 located in the recess 88 from the mounting space 92. The mounting space 92 includes a surface 91 facing downward. A first slot 94 extending 86 but spaced from the lower surface 86, a second slot 96 extending from the bottom surface of the first slot 94 toward the lower surface 86 but spaced from the lower surface 86, from the bottom surface of the second slot 96 to the lower surface a third slot 98 extending 86 but spaced from the lower surface 86, and a fourth slot 111 extending from the bottom surface of the third slot 98 toward the lower surface 86 but spaced from the lower surface 86, the fourth slot 111 having a lower surface A bottom surface 115 between the surface 86 and the surface 91 further includes a first step 113 formed at a boundary between the third groove 98 and the fourth groove 111, and a second groove 96 and a third groove 98. A second step 114 of the interface, the fourth slot 111 includes four channels 117 formed on the inner ring wall and extending between the first step 113 and the bottom surface 115, and further the peripheral wall 82 is aligned with the movable slot 133 A notch 135 is formed at the position, and the oil cover 74 further includes a passage 139 extending from the lower surface 86 to the fourth groove 111, and surrounded by the second portion 84. Extending to a slot 140 of the channel 139, the channel 139 includes a through hole 141 formed in the bottom surface 115 of the fourth slot 111 and having a smaller inner diameter. The channel 139 further includes a blocking section adjacent to the through hole 141 and having a tapered shape. 143, the lower surface 86 of the oil cover 74 is convexly formed with a positioning post 137. The oil cover 74 further includes four groove chambers 89 formed on the lower surface 86. A pivoting arm 151 has a connecting end 153 coupled to the surrounding wall 82. The pivoting arm 151 has a pivoting end 155 spaced from the connecting end 153. The pivoting end 155 has a pivot hole 156. A spherical plug 145 is movably disposed in the passage 139 and outside the through hole 141.

The oil cover 74 is received in the space 24, and the pivoting end 155 of the pivoting arm 151 is inserted into the pivot slot 28 by the first opening 30. The oil cover 74 passes through the pivot portion 26 and the pivot hole 156 with a pivot 298. (as shown in Fig. 5), the oil cover 74 can be pivoted relative to the base 20.

The locking device 10 further includes a locking block 297 slidably mounted in the movable slot 133 and a resilient member 317, the locking block 297 including an inner end 2 99 and an outer end 311, and a convex portion 315 formed on the outer end 311, the inner end 299 of the locking block 297 forms a cavity 313. The convex portion 315 of the locking block 297 faces the notch 135, and the locking block 297 can extend the convex portion 315 into the engaging position (shown in the fourth to seventh figures) and the indentation of the outer side of the surrounding wall 82 in the movable groove 133. Displacement between the disengagement positions (shown in the eighth figure) in the surrounding wall 82, the elastic member 317 is disposed between the movable groove 133 and the end wall of the cavity 313 of the lock block 297, and the elastic member 317 elasticizes the lock block 297. Positioned at the snap position.

The capping device 10 also includes a sealing pad 157 coupled to the outside of the oil cap 74 and four springs 175. The gasket 157 has a cylindrical sleeve portion 159 and a flange 171 formed on the outside of the socket portion 159. An end face of the ferrule 159 is formed to provide a slot 160 through which the lower surface 86 of the second portion 84 passes. The flange 171 includes a sealing surface 173. The second portion 84 of the oil cover 74 and the portion near the lower surface 86 are sleeved in the socket portion 159 of the gasket 157, and the passage 139 is located in the slot 160, and the springs 175 are mounted in the slot chamber 89. And one end of each spring 175 biases the gasket 171.

A gasket 177 made of metal is disposed under the gasket 157. The gasket 177 has a positioning hole 191 and a locking hole 193. The spacer 177 is inserted into the second portion 84 of the oil cover 74 through a locking hole 193 and the slot 160 through a screw 195, and the positioning post 137 of the oil cover 74 is engaged with the positioning hole 191, so that the spacer 177 cannot be rotated. Thus, the gasket 157 is positioned between the gasket 177 and the spring 175 such that the gasket 157 can compress the springs 175 along the second portion 84 toward the direction away from the gasket 177, resulting in the oil cap 74 being closed to the grease fitting 319. The effect of the cushioning, and when the oil cap 74 is not closed, the springs 175 bias the gasket 157 against the spacer 177.

A first valve 213 made of rubber, a second valve 231 made of rubber, a first spring 197, a second spring 255, and two metal spacers 199 and 251 are provided in the installation space of the oil cover 74. One valve 213 pack The first valve 213 further includes a protrusion 219 formed on the second side surface 217, and the first valve 213 is movably mounted on the first side surface 215. Three slots 98 inside. The spacer 199 is coupled to the first valve 213. The spacer 199 has a coupling hole 211, and a peripheral wall of the spacer 199 forms a ring wall 212. The protrusion 219 is engaged with the coupling hole 211 of the spacer 199 to make the spacer 199. Located on the second side 217 of the first valve 213, the outer diameter of the annular wall 212 of the spacer 199 is slightly smaller than the inner diameter of the third groove 98, and the annular wall 212 is used to hold the first valve 213 in the third groove. The position of the center axis of 98 is aligned. The first spring 197 is mounted in the fourth slot 111 and has two ends abutting against the bottom surface 115 and the surface of the spacer 199, respectively. The metal spacer 199 has better rigidity, so the first spring 197 is pushed through the bias pad 199. The first valve 213 can prevent the first valve 213 from being deformed by being biased by the first spring 197, so that the first valve 213 has a better sealing effect.

The second valve 231 includes a first end surface 233 and a second end surface 235 facing the second step surface 114. The second valve 231 further includes a through hole 239 extending between the first and second end surfaces 233 and 235. 231 further includes a coupling post 237 formed on the first end surface 233, the second valve 231 is movably mounted in the second slot 96, and the second valve 231 can follow the second slot 96 in the first position and the second position. Between the displacements, when the second valve 231 is in the first position (as shown in FIG. 3), the second end surface 235 is closely attached to the second step surface 114, and when the second valve 231 is in the second position At time (as shown in FIG. 7), the second end surface 235 is spaced apart from the second step surface 114. The spacer 251 is coupled to the second valve 231. The center of the spacer 251 has a coupling hole 253, and a peripheral wall of the spacer 251 forms a ring wall 254. The coupling post 237 of the second valve 231 is fitted into the coupling hole 253. The spacer 251 is positioned on the first end surface 233. The outer diameter of the annular wall 254 of the spacer 251 is slightly smaller than the inner diameter of the second slot 96, and the annular wall 254 is used to hold the second valve 231 in the second slot 96. The position where the center axis is aligned.

According to the drawings, the lock cover device 10 further includes a lock cover 259. The lock cover 259 has an upper end surface 271 and a lower end surface 273, and a ring wall 275 extending from the lower end surface 273 (as shown in FIG. 4). The ring wall 275 has a distal end surface 276, and four end grooves are formed on the end surface 276. 280, the inner side of the annular wall 275 partitions a chamber 277 that communicates with the recess 280. The lock cover 259 further includes a vent 278 extending from the upper end surface 271 to the chamber 277. The lock cover 259 is coupled to the surface 91 of the first ring wall 90, and a seal ring 257 is disposed between the lower end surface 273 of the lock cover 259 and the first groove 94, and the seal ring 257 is located outside the ring wall 275, so that the lock cover The lower end surface 273 of the 259 is in close contact with the first groove 94 such that the first groove 94 can communicate only with the outside of the lock cover 259 through the vent hole 278, and the ring wall 275 extends into the second groove 96.

The second spring 255 is mounted in the chamber 277 of the lock cover 259, and the elastic force of the second spring 255 is greater than the first spring 197. The two ends of the second spring 255 abut against the surface of the lower end surface 273 and the spacer 251, respectively. The second spring 255 is pressed against the second valve 231 through the metal spacer 251. Since the rigidity of the spacer 251 is better, the second valve 231 can be prevented from being deformed by the second spring 255 being pressed, so that the second valve 231 is second. The step 114 can have a better adhesion effect. In addition, the second spring 255 has a higher modulus of elasticity than the first spring 197, such that the first valve 213 can be supported by the first spring 197 such that the first side 215 abuts against the second end surface 235 of the second valve 231 (eg, 4th) The second spring 255 can elastically hold the second valve 231 in the first position.

According to the drawings, the capping device 10 further includes a trim cover 279 combined with the oil cap 74 and a sealing gasket 333, wherein the trim cover 279 has a peripheral wall 291, and the peripheral wall 291 has a lower surface 293, and the gasket The sheet 333 includes a first portion 335 having the same cross-sectional shape as the upper surface 78, and a second portion 337 having the same cross-sectional shape as the second ring wall 131. The first portion 335 of the gasket 333 abuts against the upper surface 78 of the oil cap 74, the second portion 337 abuts the end surface of the second ring wall 131 aligned with the upper surface 78, and the trim cover 279 is located above the gasket surface 333 And locked in The oil cover 74 causes the lower surface 293 of the trim cover 279 to clamp the first and second portions 335, 337 of the sealing sheet 333, such that the trim cover 279 cooperates with the first portion 335 to prevent oil, water, air or other substances from being covered by the cover. The gap between the 279 and the oil cover 74 enters and exits the recess 88, and the second portion 337 cooperates with the trim cover 279 to sealably separate the recess 88 from the movable slot 133, thereby preventing oil, water, air or other substances from being able to pass the gap 155. The movable chamber 133 enters and exits the recess 88, so that the recess 88 can communicate with the outside of the oil cover 74 only through the vent hole 81.

Referring to the third and fourth figures, for convenience of explanation, it is assumed that the oil cover 74 is closed on the grease fitting 319, at which time the sealing surface 173 of the gasket 157 is in close contact with the end surface of the grease fitting 319, and the plug member 145 is affected by gravity. The channel 139 is located near the slot 140 and abuts against the surface of the spacer 177, so that the channel 139 communicates with the mounting space 92 through the through hole 141, and the gasket 157 is displaced by the grease fitting 319 in a direction away from the spacer 177. A small distance (about 2 mm) is caused to be opened by the slot 140 of the cover 74 (as shown in FIG. 4A), so that the tank passage 331 in the grease fitting 319 communicates with the fourth slot 111 through the slot 140 and the passage 139, and when When the oil cover 74 is closed, the convex portion 315 of the locking block 297 extends into the second opening 40 to engage with the engaging portion 41, the top block 44 is located at the retracted position, and the convex portion 46 abuts against the convex portion of the locking block 297. The end face 315 causes the oil cap 74 to remain in the closed state. Figure 4 shows that when the pressure inside the tank is balanced or the pressure outside the tank is small, the first and second valves 213, 231 are only biased by the first or second springs 197, 255, respectively, and because the second spring 255 The spring force is greater than the first spring 197, causing the second valve 231 to remain in the first position, so the second valve 231 closes the third slot 98 and the first side 215 of the first valve 213 abuts against the second valve The second end surface 235 of the second valve 231, such that the perforation 239 of the second valve 231 is closed by the first valve 213, in such a state, the fuel or oil and gas in the fuel tank can only flow to the third tank 98 at the top, and the material outside the fuel tank At most, the air can flow to the second tank 96 at the top, that is, the first and second valves 213, 231 are sealingly blocked in the second tank 96 and the third tank 9 Between 8 and 8, when the vehicle is overturned or dumped, the fuel in the fuel tank is not easily leaked through the oil cover 74, and the oil and gas in the oil tank is not easily leaked through the oil cover 74.

When the fuel in the fuel tank is reduced due to the engine operation of the vehicle, the oil tank 74 is in a closed state due to the oil cover 74, which causes a negative pressure state inside the fuel tank, so that suction inside the fuel tank is generated, and the negative pressure inside the fuel tank reaches 10kpa~ At 15 kPa, the suction force generated inside the fuel tank to the first valve 213 will be sufficient to overcome the elastic force of the first spring 197, so that the first valve 213 is attracted by the suction force generated by the oil tank and displaced toward the first step 113 until the ring of the gasket 199 The wall 212 abuts against the first step surface 113 (as shown in FIG. 5), at which time the first side 215 of the first valve 213 will be spaced apart from the second end surface 235 of the second valve 231, causing the second valve 231 The through hole 239 is turned on, and since the spacer 199 is smaller than the third groove 98, the spacer 199 cannot completely cover the first step surface 113 (as shown in FIG. 6), so the third groove 98 and the fourth groove 111 are connected. The air is communicated through the four channels 117. In this state, the air outside the oil cap 74 enters the recess 88 through the vent hole 81, and the air further enters the third slot 98 through the vent hole 278 and the through hole 239. The air in the tank 98 passes through the four channels 117 After the four slots 111 enter the tank passage 331 through the passage 139, the air outside the oil cover 74 can be introduced into the oil tank, thereby causing the internal pressure to decrease the negative pressure value due to the air entering the fuel tank, so that the fuel tank can smoothly supply the fuel to the tank. engine. When the negative pressure value is reduced to be insufficient to resist the elastic force of the first spring 197, the first valve 213 is again biased by the first spring 197 to urge the first side surface 215 to abut against the second end surface of the second valve 231. 235.

When the vehicle is not in the state of being fired, the fuel tank will generate high temperature due to exposure to the sun, such that the oil and gas inside the fuel tank will increase, so that the pressure inside the fuel tank will increase. When the positive pressure inside the fuel tank is greater than 20 kPa, the inside of the fuel tank The pressure pushes the first and second valves 213, 231 through the passage 139 against the elastic force of the second spring 255, and the first and second valves 213, 231 may produce two different states, as shown in Fig. 7. The first state after the first and second valves 213 are pushed by the pressure inside the fuel tank, when the second valve 231 When the first position is displaced from the first position to the second position, the first side surface 215 of the first valve 213 closely closes the second end surface 235 of the second valve 231 to close the through hole 239, and the second end surface 235 of the second valve 231 The second step 114 is spaced apart and the spacer 251 abuts against the end face 276 of the lock cover 259 (as shown in Figure 7), although the spacer 251 abuts against the end face 276 of the lock cover 259, but due to the end face 276 Four recesses 280 are provided so that the chamber 277 remains in communication with the second slot 96. After the second valve 231 is in the second position, the pressure inside the tank enters the third and fourth slots 98, 111 via the passage 139, and The recess 280 and the vent hole 278 enter the recess 88, and finally are released to the outside through the vent hole 81 to balance the pressure, causing the positive pressure value inside the tank to decrease.

Referring to FIG. 7A, the second state after the first and second valves 213 are pushed by the pressure inside the fuel tank, although the second valve 231 is pushed by the internal pressure of the tank to the second position, the first of the first valve 213 The side 215 does not abut against the second side 235 of the second valve 231, so that the perforation 239 of the second valve 231 is not closed by the first valve 213, and the pressure inside the tank enters the third and fourth slots 98 via the passage 139, 111, through the second valve 235, the through hole 239 and the vent hole 278 enter the concave chamber 88, and finally released to the outside through the vent hole 81 to balance the pressure, causing the positive pressure value inside the fuel tank to decrease.

When fuel is to be added to the fuel tank, the main switch lock is operated to cause the actuating member 54 to be rotated by the cable, and the lever 60 of the actuating member 54 displaces the interlocking top block 44 from the retracted position (as shown in Fig. 6) to the extension. The out position (as shown in Fig. 8), when the top block 44 is in the extended position, the lock block 297 is pushed by the convex portion 46 of the top block 44 and the displacement is disengaged from the engaging portion 41 (as shown in Fig. 8), The oil cover 74 is released, and the oil cover 74 is further pivoted about the axis of rotation defined by the pivot 298 to open the fuel tank passage 331 of the fuel filler nozzle 319 to add fuel into the fuel tank.

In addition, when the vehicle is tilted and the lock device 10 is turned over (as shown in Fig. 9), the plug member 145 is moved by gravity into the blocking section 143, so that the gasoline in the fuel tank flows into the passage 139 and is plugged. 145 blocked, thus The speed at which the gasoline enters the installation space 92 through the through hole 141 is lowered, further reducing the speed at which the gasoline in the fuel tank overflows outside the lock device 10.

The invention utilizes the change of the pressure of the fuel tank. When the pressure inside the oil tank is negative pressure, the generated suction force can displace the first valve 213, so that the air outside the oil cover 74 enters the equilibrium pressure in the oil tank, and when the inside of the oil tank is positive pressure, the pressure is generated. The thrust can simultaneously push the first and second valves 213, 231 to dissipate the oil and gas inside the fuel tank to the outside of the oil cover 74, and the first and second valves 213, 231 are in close contact when the internal pressure of the oil tank is balanced with the outside. The function makes it difficult for the fuel in the fuel tank to leak when the vehicle is overturned. In addition, the vent hole 81 cooperates with the design of the extension wall 83 to utilize the physical phenomenon that the water flows downward, so that the air outside the oil cover 74 can easily enter the oil cover 74, but the moisture or impurities outside the oil cover 74 are substances. It is not easy to pass through the vent hole 81 through the vent hole 81 into the recess 88 of the oil cap 74.

The basic teachings of the present invention have been described, and many extensions and variations will be apparent to those of ordinary skill in the art. For example, the capping device 10 of the present invention may not include the spacer 199. In the state lacking the spacer 199, the first valve 213 needs to have the ability to abut against the first step 113 without closing the channels. The second side 217 of the 117, when a negative pressure is generated in the oil tank, the second side surface 217 of the first valve 213 can abut against the first step surface 113, and one end of the first spring 197 abuts against the second side surface 217 on. Alternatively, the capping device 10 of the present invention may not include the spacer 251. When the second valve 231 is displaced to the second position in a state where the spacer 251 is absent, the first end surface 233 abuts against the end surface of the lock cover 259. 276, and one end of the second spring 255 abuts against the first end surface 233. Or the oil cover 74 of the capping device 10 of the present invention is not only pivotally connected to the seat body 20, for example, the oil cap 74 can be directly engaged with the seat body 20, or the outer surface of the oil cap 74 is provided with external threads, and the seat body 20 is disposed. The inner surface of the screw provides the oil cover 74 to be locked to the base body 20, that is, the oil cover 74 is detachably coupled to the base body 20 in any known manner, and does not affect the first and the first aspect of the present invention. The operation of the two valves 213, 231, so that the capping device 10 of the present invention can retain the same work can. Alternatively, the capping device 10 of the present invention may not include the cap 279. Since the two shim 199, 251 has a function of preventing the external matter of the oil cap 74 from entering the oil tank, only the cap 71 is made in the state lacking the cap 279. The internal structure is exposed without affecting the function of the capping device 10 of the present invention.

Further, the vent hole 81 can be disposed outside the bottom surface (93), for example, the vent hole 81 is disposed on the peripheral wall 82 of the first portion 76, and the extension wall 83 corresponding to the vent hole 81 is extended from the outer surface of the peripheral wall 82. The L shape of the lower surface 86 can also be achieved, and the outside air easily enters the oil cover 74, but effects such as moisture or impurities are less likely to enter the oil cover 74.

The present invention disclosed in the specification is intended to be illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and is not intended to

10‧‧‧Locking device

20‧‧‧ body

22‧‧‧ surrounding walls

24‧‧‧ Space

26‧‧‧Band

28‧‧‧ pivot slot

30‧‧‧first opening

32‧‧‧ erection department

34‧‧‧ upper surface

36‧‧‧ lower surface

38‧‧‧Event space

40‧‧‧second opening

41‧‧‧Care Department

42‧‧‧卡合块

44‧‧‧Top block

46‧‧‧ convex

48‧‧‧ Guide slot

50‧‧‧ cover

52‧‧‧Long slot

54‧‧‧actuation

56‧‧‧ first end

58‧‧‧ second end

60‧‧ ‧ lever

62‧‧‧ pivot hole

64‧‧‧ bolt

66‧‧‧Outer cover

68‧‧‧ openings

70‧‧‧Circle

72‧‧‧Snap hole

74‧‧‧ oil cover

76‧‧‧Part I

78‧‧‧Upper surface

79‧‧‧ end face

81‧‧‧Ventinel

82‧‧‧ surrounding walls

83‧‧‧Extended wall

84‧‧‧Part II

86‧‧‧ lower surface

88‧‧ ‧ alcove

89‧‧‧Slot room

90‧‧‧First ring wall

91‧‧‧ surface

92‧‧‧Installation space

93‧‧‧ bottom

94‧‧‧first slot

96‧‧‧second slot

98‧‧‧ third slot

111‧‧‧fourth slot

113‧‧‧ first stage

114‧‧‧ second stage

115‧‧‧ bottom

117‧‧‧ channel

131‧‧‧second ring wall

133‧‧‧ activity slot

135‧‧ ‧ gap

137‧‧‧Positioning column

139‧‧‧ channel

140‧‧‧Slots

141‧‧‧through hole

143‧‧‧ Blocking section

145‧‧‧plugs

151‧‧‧ pivot arm

153‧‧‧Connecting end

155‧‧‧ pivot end

156‧‧‧ pivot hole

157‧‧‧ Seal

159‧‧‧ Sockets

160‧‧‧ slots

171‧‧‧Flange

173‧‧‧ sealing surface

175‧‧ ‧ spring

177‧‧‧shims

191‧‧‧Positioning holes

193‧‧‧Keyhole

195‧‧‧ screws

197‧‧‧First spring

199‧‧‧shims

211‧‧‧bond hole

212‧‧‧Circle wall

213‧‧‧first valve

215‧‧‧ first side

217‧‧‧ second side

219‧‧‧Bump

231‧‧‧Second valve

233‧‧‧ first end face

235‧‧‧second end face

237‧‧‧ binding column

239‧‧‧Perforation

251‧‧‧shims

253‧‧‧Combination hole

254‧‧‧ ring wall

255‧‧‧Second spring

257‧‧‧Seal ring

259‧‧‧Lock cover

271‧‧‧ upper end

273‧‧‧ lower end

275‧‧‧ ring wall

276‧‧‧End face

277‧‧ ‧ room

278‧‧‧vents

279‧‧‧ Cover

280‧‧‧ Groove

291‧‧‧ surrounding walls

293‧‧‧ lower surface

297‧‧‧Lock block

298‧‧‧ pivot

299‧‧‧ inner end

311‧‧‧Outside

313‧‧‧ 容容

315‧‧‧ convex

317‧‧‧Flexible components

319‧‧‧ Fuel nozzle

331‧‧‧ tank passage

333‧‧‧Sealing gasket

335‧‧‧Part 1

337‧‧‧Part II

Fig. 1 is a perspective exploded perspective view of the capping device of the present invention.

Fig. 2 is a partially exploded perspective view of the oil cap of the present invention.

Figure 3 is a perspective assembled view of the oil cap of the present invention.

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.

Fig. 4A is a cross-sectional view taken along line 4A-4A of Fig. 3.

Fig. 5 is a state diagram after the first valve is displaced when a negative pressure is generated in the oil tank in the state of Fig. 4.

Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5.

Fig. 7 is a first state diagram after displacement of the first and second valves when a positive pressure is generated in the fuel tank in the state of Fig. 4.

Fig. 7A is a second state diagram after the first and second valves are displaced when a positive pressure is generated in the fuel tank in the state of Fig. 4.

Fig. 8 is a view showing a state in which the lock block is opened to open the oil cover after the actuator is rotated.

Fig. 9 is a view showing a state in which the plug member blocks the through hole after the lock device is turned over when the vehicle is tilted.

74‧‧‧ oil cover

76‧‧‧Part I

78‧‧‧Upper surface

79‧‧‧ end face

81‧‧‧Ventinel

82‧‧‧ surrounding walls

83‧‧‧Extended wall

84‧‧‧Part II

86‧‧‧ lower surface

88‧‧ ‧ alcove

89‧‧‧Slot room

90‧‧‧First ring wall

91‧‧‧ surface

92‧‧‧Installation space

93‧‧‧ bottom

94‧‧‧first slot

96‧‧‧second slot

98‧‧‧ third slot

111‧‧‧fourth slot

113‧‧‧ first stage

114‧‧‧ second stage

115‧‧‧ bottom

117‧‧‧ channel

131‧‧‧second ring wall

133‧‧‧ activity slot

135‧‧ ‧ gap

137‧‧‧Positioning column

139‧‧‧ channel

140‧‧‧Slots

141‧‧‧through hole

143‧‧‧ Blocking section

145‧‧‧plugs

151‧‧‧ pivot arm

153‧‧‧Connecting end

155‧‧‧ pivot end

156‧‧‧ pivot hole

157‧‧‧ Seal

159‧‧‧ Sockets

160‧‧‧ slots

171‧‧‧Flange

173‧‧‧ sealing surface

175‧‧ ‧ spring

177‧‧‧shims

191‧‧‧Positioning holes

193‧‧‧Keyhole

195‧‧‧ screws

197‧‧‧First spring

199‧‧‧shims

211‧‧‧bond hole

212‧‧‧Circle wall

213‧‧‧first valve

215‧‧‧ first side

217‧‧‧ second side

219‧‧‧Bump

231‧‧‧Second valve

233‧‧‧ first end face

235‧‧‧second end face

237‧‧‧ binding column

239‧‧‧Perforation

251‧‧‧shims

253‧‧‧Combination hole

254‧‧‧ ring wall

255‧‧‧Second spring

257‧‧‧Seal ring

259‧‧‧Lock cover

271‧‧‧ upper end

275‧‧‧ ring wall

276‧‧‧End face

277‧‧ ‧ room

278‧‧‧vents

279‧‧‧ Cover

280‧‧‧ Groove

291‧‧‧ surrounding walls

293‧‧‧ lower surface

297‧‧‧Lock block

299‧‧‧ inner end

311‧‧‧Outside

313‧‧‧ 容容

315‧‧‧ convex

317‧‧‧Flexible components

333‧‧‧Sealing gasket

335‧‧‧Part 1

337‧‧‧Part II

Claims (11)

A lock device for a fuel tank, comprising: a body (20) having a space (24) formed inside, the seat body (20) being fixed to a fuel tank provided by a fuel tank (319) ); an oil cap (74) detachably engaged in the space (24) of the seat body (20), the oil cap (74) including an upper surface (78) and a lower surface (86), the oil cap (74) ) includes an alcove (88) extending from the upper surface (78) toward the lower surface (86) but spaced from the lower surface (86), the recess (88) having a bottom surface (93) within the recess (88) And extending from the bottom surface (93) to form a first annular wall (90) separating the installation space (92), the first annular wall (90) has a surface (91), and the installation space (92) comprises a surface ( 91) A first groove (94) extending toward the lower surface (86) but spaced from the lower surface (86), extending from the bottom surface of the first groove (94) toward the lower surface (86) but separated from the lower surface (86) a second slot (96) opened, a third slot (98) extending from the bottom surface of the second slot (96) toward the lower surface (86) but spaced from the lower surface (86), and a third slot (98) a fourth groove (111) extending from the bottom end toward the lower surface (86) but spaced apart from the lower surface (86), the fourth groove (111) having a bottom surface (115), the mounting space (92) further comprising a first step (113) at a boundary between the third groove (98) and the fourth groove (111), and a second portion formed at a boundary between the second groove (96) and the third groove (98) The step (114), the oil cover (74) further includes a passage (139) extending from the lower surface (86) to the fourth groove (111), and a vent hole (81) is formed on the bottom surface (93) and located in the installation space ( 92) outside, a slot (140) is formed in the lower surface (86), and the slot (140) extends from the outer peripheral surface of the oil cover (74) to the passage (139); a gasket (157) is coupled to the oil cover (74) outside and near the lower surface (86), the gasket (157) has a flange (171) that is detachably abutted against the end surface of the grease fitting (319), The fuel filler nozzle (319) communicates with the fuel tank one of the tank passages (331) and the slot (140) communicating; a first valve (213) movably mounted in the third slot (98), the first valve (213) including a first side (215) and facing the first step (113) a second side (217); a first spring (197) is mounted between the bottom surface (115) of the fourth slot (111) of the oil cap (74) and the first valve (213), the first spring ( 197) relatively biasing the first valve (213); a second valve (231) movably mounted in the second slot (96), the second valve (231) including a first end face (233) and facing a second end face (235) of the second-order surface (114), the second valve (231) further includes a through hole (239) extending between the first and second end faces (233, 235), and the second valve (231) Between the first position and the second position along the second slot (96); a lock cover (259), which is bonded to the surface (91) of the first ring wall (90), covers the mounting space (92) The lock cover (259) has an upper end surface (271) and a lower end surface (273). The lock cover (259) further includes a vent hole (278); a seal ring (257) sealingly coupled to the first groove (94) Between the lower end surface (273) of the lock cover (259); a second spring (255) coupled between the lock cover (259) and the first end surface (233) of the second valve (231), The second valve (231) is elastically and biased to be in the first position; when the internal pressure of the tank is balanced with the outside, the first valve (213) is biased by the first spring (197) to make the first side (215) Closely abutting against the second end surface (235) of the second valve (231), the perforation (239) is closed, and the second valve (231) is biased by the second spring (255) in the first position, so that The second end surface (235) closely abuts against the second step surface (114), and closes the third and fourth slots (98, 111) to prevent oil and gas leakage inside the fuel tank, and suction generated inside the fuel tank. Greater than the first spring (197) supporting the first valve (213), the first valve (213) compresses the displacement of the first spring (197) such that the first side surface (215) is separated from the second end surface (235) to open the perforation (239), and the external air is vented (81), The vent (278), the perforation (239), the third slot (98), and the fourth slot (111) enter the fuel tank via the passage (139), and the pressure generated inside the fuel tank is greater than the second spring (255) supporting the second valve. (231) When the spring force is in the first position, the second valve (231) compresses the second spring (255) to the second position, and the second end surface (235) is disengaged from the second step (114), and the pressure inside the fuel tank The third and fourth slots (98, 111) enter through the passage (139), and are released to the outside through the vent holes (278) and the vent holes (81). The lock device for a fuel tank according to claim 1, wherein the fourth groove (111) of the oil cover (74) is formed on the inner ring wall and on the first step (113) and the bottom surface (115) a channel (117) extending between the first valve (213) including a stud (219) formed on the second side (217), the capping device (10) further including a first valve (213) a combined gasket (199), the gasket (199) has a coupling hole (211), and the protrusion (219) of the first valve (213) is engaged with the coupling hole (211) of the gasket (199) The gasket (199) is located in the third groove (98), and the gasket (199) is smaller than the third channel (98), and one end of the first spring (197) abuts against the gasket (199). When the internal pressure of the fuel tank is balanced with the outside, the gasket (199) is separated from the first step surface (113); when the suction force generated inside the fuel tank is greater than the elastic force of the first spring (197) supporting the first valve (213) When the gasket (199) is displaced with the first valve (213) and the gasket (199) abuts against the first step (113), the air outside the oil cap (74) is passed through the vent (81). Vent (278), perforation (239), third slot (98), and enter the fourth slot (111) from the channel (117) and then through the channel (139) Equilibrium pressure within the tank. A lock device for a fuel tank according to item 2 of the patent application, wherein The gasket (199) includes a ring wall (212) formed on the outer periphery, the outer diameter of the ring wall (212) being slightly smaller than the inner diameter of the third groove (98), causing the gasket (199) to pass the first valve (213) It is maintained on the center line of the third slot (98). The lock device for a fuel tank according to claim 1, wherein the second valve (231) includes a coupling post (237) formed on the first end surface (233), and the locking device (10) further includes a gasket (251) combined with the second valve (231), the gasket (251) has a coupling hole (253), the coupling column (237) is engaged with the coupling hole (253), and the second spring (255) One end is pressed against the gasket (251); when the internal pressure of the tank is balanced with the outside, the gasket (251) is separated from the end surface (276) of the lock cover (259), and the pressure generated inside the fuel tank is greater than When the second spring (255) supports the spring force of the second valve (231) in the first position, the spacer (251) abuts against the end face (276) of the lock cover (259). The lock device for a fuel tank according to claim 4, wherein the gasket (251) further comprises a ring wall (254) formed on the outer circumference, the outer diameter of the ring wall (254) being slightly smaller than the second groove ( The inner diameter of 96) causes the gasket (251) to hold the second valve (231) on the centerline of the second groove (96). The capping device for a fuel tank according to claim 1, wherein the oil cap (74) comprises a first portion (76) and a second portion (84), and an upper surface (78) of the oil cap (74) Located at the end of the first portion (76), the lower surface (86) is located at the end of the second portion (84), and the oil cap (74) is further formed between the first portion (76) and the second portion (84). An end surface (79), the vent hole (81) extends from the bottom surface (93) to the end surface (79). The lock device for a fuel tank according to claim 6, wherein the end surface (79) and the vent hole (81) form an extension wall (83), and the vent hole (81) is located at the extension wall (83). Among them. The capping device for a fuel tank according to claim 1, wherein the capping device (10) further comprises a gasket (333) and a cap (279) disposed on the upper surface (78), The cover (279) abuts against the sealing gasket (333) and is locked to the oil cover (74), and the decorative cover (279) is fitted with the upper surface (78) of the oil cover (74) to clamp the sealing gasket ( 333), causing the upper surface (78) of the oil cap (74) to be in close contact. The lock device for a fuel tank according to claim 1, wherein a lower end surface (273) of the lock cover (259) further extends a ring wall (275), and the ring wall (275) has a distal end surface (276). A groove (280) is formed on the end surface (276), and a space chamber (277), a groove (280) and a chamber (277), which communicate with the groove (280), are partitioned from the inner side of the ring wall (275). Connecting, the ring wall (275) of the lock cover (259) extends into the second slot (96), and the seal ring (257) is located outside the ring wall (275), and the second spring (255) is located in the chamber (277) When the second valve (231) is in the second position, the second valve (231) is positioned relative to the end face (276) of the ring wall (275) of the lock cover (259), the first valve (213) The first side (215) abuts against the second end surface (235) of the second valve (231), closes the perforation (239) of the second valve (231), and the pressure in the oil tank is via the lock cover (259) The groove (280) enters the chamber (277) and is released to the outside through the vent (278) and the vent (81). The lock device for a fuel tank according to claim 1, wherein a lower end surface (273) of the lock cover (259) further extends a ring wall (275), and the ring wall (275) has a distal end surface (276). A groove (280) is formed on the end surface (276), and a space chamber (277), a groove (280) and a chamber (277), which communicate with the groove (280), are partitioned from the inner side of the ring wall (275). Connecting, the ring wall (275) of the lock cover (259) extends into the second slot (96), and the seal ring (257) is located outside the ring wall (275), and the second spring (255) is located in the chamber (277) Inside; when the second valve (231) is in the second position, the second valve (231) phase Positioning the end face (276) of the ring wall (275) against the lock cover (259), the first side (215) of the first valve (213) and the second end face (235) of the second valve (231) Separated, thus opening the perforation (239) of the second valve (231), the pressure in the tank enters the chamber (277) through the perforation (239) of the second valve (231) and passes through the vent (278) and the vent (81) Released to the outside world. The lock device for a fuel tank according to claim 1, wherein the passage (139) includes a through hole (141) formed on the bottom surface (115) of the fourth groove (111) and having a smaller inner diameter, the passage ( 139) further comprising a blocking section (143) close to the through hole (141) and having a tapered shape, wherein a plug (145) is movably disposed in the passage (139), and the plug (145) is located in the passage ( a slot (140) of 139); when the locking device (10) causes the plug member (145) to move into the blocking portion (143) by gravity, the plug member (145) lowers the passage of gasoline in the fuel tank through the through hole (141). The speed of entering the installation space 92 further causes the gasoline to overflow to the speed of the lock cover device (10).