Oil gun for refueling motorcycle and splash guard of oil gun

Abstract

The utility model relates to a refueling gun for motorcycle refueling and a splash guard thereof, the splash guard for the motorcycle refueling gun comprises a shell, the shell comprises a connecting part, a turning part and an extending part, the connecting part is connected with the refueling gun, the turning part is located between the connecting part and the extending part, and the extending part is connected with the connecting part. The first end face of the extending part is connected with the turning part, and the second end face of the extending part can cover an oil tank opening of the motorcycle. And the rigid supporting piece is arranged in the extension part of the shell and is used for supporting the oil gun when the extension part covers the oil filling port of the motorcycle. The oil gun can be supported by the splash guard of the oil gun, and fatigue of operators in the oil filling process can be effectively relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of motorcycle refueling, in particular to a refueling gun for motorcycle refueling and its splash guard cover. BACKGROUND

[0002] With the rapid development of the automobile industry, urban traffic congestion, parking difficulty, high fuel consumption and other problems are increasingly prominent. These drawbacks prompt some consumers and urban residents to seek more flexible and efficient travel methods, which promotes the development of the motorcycle market. Motorcycles have become an ideal means of transport in congested urban environments due to their smaller size, lower fuel consumption and higher mobility. In addition, the purchase and maintenance costs of motorcycles are generally lower than those of cars, attracting the favor of young people and urban commuters.

[0003] However, the design of the oil gun in the prior art is mainly to meet the needs of the automobile fuel tank, and the size and shape of the splash guard cover are suitable for the structure of the automobile fuel tank. When refueling the motorcycle, this design has significant limitations. First, due to the design characteristics of the motorcycle fuel tank, the oil gun barrel cannot be inserted as deeply into the fuel tank as when refueling a car, so the splash guard cover cannot effectively cover the motorcycle fuel tank opening. Second, the motorcycle requires a lower flow rate for refueling, which causes the overflow self-sealing function of the traditional oil gun to fail, which forces the operator to visually observe the refueling condition in the fuel tank and manually stop refueling when the tank is full. In order to clearly observe the state of the fuel tank, the splash guard cover cannot also block the fuel tank opening.

[0004] Without the splash guard cover covering the fuel tank opening, the operator needs to hold the refueling gun continuously during the refueling process, which cannot be assisted, increasing the operator's refueling fatigue. It can also cause the oil vapor emitted from the fuel tank during refueling to be ineffective in being collected and recovered by the splash guard cover, affecting the environment of the gas station and the personal health of the operator. Moreover, it can cause oil splashing, which, if splashed on the high-temperature shell of the motorcycle engine, poses a potential risk of causing a fire. These problems indicate that the existing oil gun design has obvious deficiencies in meeting the needs of motorcycle refueling, and needs to be improved to ensure the safety and environmental protection of motorcycle refueling. SUMMARY

[0005] In view of the technical problems existing in the prior art, the utility model provides a refueling gun for motorcycle refueling and its splash guard cover, which can support the oil gun during refueling and effectively reduce the operator's fatigue during refueling.

[0006] The application provides a splash-proof cover for a motorcycle fuel gun, comprising: a shell comprising a connecting portion, a turning portion and an extending portion, the connecting portion being connected to the fuel gun, the turning portion being between the connecting portion and the extending portion, a first end surface of the extending portion being connected to the turning portion, and a second end surface being capable of covering a motorcycle fuel tank opening; and a rigid support arranged in the extending portion of the shell for supporting the fuel gun when the extending portion covers the motorcycle fuel opening.

[0007] The splash-proof cover for a motorcycle fuel gun as described above, wherein the turning portion comprises one or more corrugated folds formed by concave-convex bending in a direction perpendicular to the axis of the connecting portion.

[0008] The splash-proof cover for a motorcycle fuel gun as described above, wherein the angle between the axis of the extending portion and the axis of the connecting portion is 175°-140°.

[0009] The splash-proof cover for a motorcycle fuel gun as described above, wherein the plane in which the first end surface of the extending portion is located is perpendicular to the axis of the connecting portion.

[0010] The splash-proof cover for a motorcycle fuel gun as described above, wherein the peripheral size of the extending portion gradually increases from the first end surface to the second end surface.

[0011] The splash-proof cover for a motorcycle fuel gun as described above, wherein the rigid support has the same shape as the extending portion, and the extending portion is wrapped around the rigid support.

[0012] The splash-proof cover for a motorcycle fuel gun as described above, wherein the rigid support is a support ring or a hollow support ring.

[0013] According to another aspect of the application, a fuel gun for refueling a motorcycle is provided, comprising: a gun body, a gun tube assembly arranged in a gun tube assembly cavity of the gun body, and a splash-proof cover for a motorcycle fuel gun as described above.

[0014] The fuel gun for refueling a motorcycle as described above, wherein the gun tube assembly comprises an oil tube and an air tube, a first end of the oil tube being arranged in the gun tube assembly, and a second end of the oil tube extending out of the gun body, the air tube being sleeved on the oil tube and connected to the first end of the oil tube.

[0015] The fuel gun for refueling a motorcycle as described above, wherein the connecting portion is connected to the air tube, the extending portion extends towards the second end of the oil tube, and the distance between the second end surface of the extending portion and the second end of the oil tube is 30mm-70mm.

[0016] The splash-proof cover of the refueling gun can completely cover the oil tank opening of the motorcycle, can greatly reduce the fatigue of the operator during refueling, can effectively collect and recycle oil gas, can prevent oil from splashing out of the oil tank, and can effectively solve the problems in the refueling process of the motorcycle. BRIEF DESCRIPTION OF DRAWINGS

[0017] In the following, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, in which:

[0018] Figures 1A-1D a schematic diagram of a refueling gun according to an embodiment of the present application;

[0019] Figure 2 a schematic diagram of a resistance filter according to an embodiment of the present application;

[0020] Figure 3 a schematic diagram of a gun barrel assembly according to an embodiment of the present application;

[0021] Figure 4 a schematic diagram of a vacuum cap according to an embodiment of the present application;

[0022] Figure 5 a graph showing the change of refueling pressure curve according to an embodiment of the present application;

[0023] Figures 6A-6C a schematic diagram of a splash-proof cover according to an embodiment of the present application; and

[0024] Figure 7 a schematic diagram of a refueling scene according to an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 100, fuel gun; 110, gun body; 101, oil inlet; 102, oil outlet; 104, oil passage; 105, gas passage; 106, oil pressure passage; 107, gas pressure passage; 108, vacuum passage; 120, valve assembly; 121, first valve seat; 1211, oil passage; 1212, gas passage; 122, first valve core; 1221, valve rod; 1222, oil valve core; 1223, gas valve core; 130, driving mechanism; 131, driving shaft; 1311, connecting part; 1312, driving part; 132, trigger; 133, connecting piece; 140, resistance filter screen; 141, first area; 142, second area; 143, oil liquid through hole; 144, gas through hole; 145, reinforcing edge; 150, gun tube assembly; 151, oil pipe; 152, gas pipe; 153, venturi valve; 1531, second valve seat; 1532, second valve core; 1533, vacuum spring; 1534, vacuum hole; 154, 600 splash guard; 160, vacuum cap; 161, cap cover; 1611 through hole; 1612, spacing; 162 base; 163, piston; 164, self-sealing spring; 165, diaphragm; 166, gun spring; 167, blocking pin seat; 1671, blocking pin; 610, shell; 611, connecting part; 612, turning part; 6121, wrinkle; 613, extension; 620, rigid support; DETAILED DESCRIPTION

[0027] The principles and spirits of the present application will be described below with reference to several exemplary embodiments. It should be understood that the purpose of providing these embodiments is to make the principles and spirits of the present application clearer and more thorough, so that those skilled in the art can better understand and implement the principles and spirits of the present application. The exemplary embodiments provided herein are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments herein, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] In the following detailed description, reference can be made to the various drawings that form a part of the present disclosure and are used to illustrate certain embodiments of the present application. In the drawings, like reference numerals describe substantially similar components throughout the several views. Various specific embodiments of the present application are described in sufficient detail below to enable one of ordinary skill in the art to implement the subject matter of the present application. It should be understood that other embodiments can be utilized and structural, logical, and electrical changes can be made without departing from the scope of the present application. Moreover, the use of the terms first, second, third, etc., in the present application are used to distinguish one entity (or action) from another, and are not meant to require or imply any order or sequence between these entities (or actions).

[0029] The application provides a refueling gun (or simply referred to as "oil gun") which can be used for refueling a motorcycle. The oil gun can stably maintain low flow rate refueling, can be adapted to the oil tank of the motorcycle, and can prevent oil splashing. During the refueling process, the trigger of the oil gun can be hung on the gear of the oil gun, and the operator does not need to continuously control the trigger, thereby reducing the refueling fatigue of the operator. Moreover, the oil gun can realize the overflow self-sealing function of the oil gun during low-speed refueling, that is, the oil gun can automatically jump, the operator does not need to visually observe the refueling condition, and different refueling conditions of the oil gun can be met.

[0030] The application further provides a splash-proof cover of the oil gun which can completely cover the oil tank opening of the motorcycle, can support the oil gun during the refueling process, can effectively solve the fatigue of the operator during the refueling of the motorcycle, can effectively collect and recycle oil gas, and can prevent oil splashing out of the oil tank.

[0031] The technical solutions of the application are further described below through specific embodiments. Those skilled in the art should understand that, under the guidance of the following embodiments, other alternative solutions capable of realizing the same or similar functions can still be provided. These alternative solutions are also within the protection scope of the application.

[0032] Figures 1A-1D It is a schematic view of the oil gun according to an embodiment of the application. Figure 1A It is a perspective view of the oil gun, Figure 1B It is a sectional view of the oil gun, Figure 1C and Figure 1D It is an enlarged view of a part of the oil gun.

[0033] As shown in the figure, the oil gun 100 comprises a gun body 110, a valve assembly 120, a driving mechanism 130, a resistance filter screen 140 and a gun barrel assembly 150. The gun body 110 comprises an oil inlet 101 and an oil outlet 102. The oil inlet 101 can be connected with a rubber tube through an inlet thread, and the oil gun can be connected to a refueling machine. The oil of the refueling machine enters the gun body through the oil inlet, and then flows out of the gun body through the oil outlet. The valve assembly 120 is arranged on the gun body 110 and close to the oil inlet, and can control the oil to enter the gun body. The driving mechanism 130 is arranged on the gun body 110 and connected with the valve assembly, and can be used for controlling the valve assembly. The gun barrel assembly 150 is arranged on the gun body and close to the oil outlet, and can be inserted into the oil tank of the motorcycle, and the oil flowing out of the oil outlet of the gun body can be added to the oil tank. The resistance filter screen 140 is arranged on the valve assembly and close to the oil inlet of the gun body, and can be used for reducing the flow rate of the oil entering the gun body, so as to adapt to the refueling of the motorcycle.

[0034] In some embodiments, the fueling gun of the present application can also have an automatic shut-off function. The fueling gun 100 can further include a vacuum cap 160 disposed on the gun body 110 and configured to lock the drive mechanism 130. When the drive mechanism 130 is in a locked state, the drive mechanism 130 becomes an integral whole and is in an available state, and the valve assembly 120 can be controlled. When the drive mechanism 130 is in an unlocked state, the drive mechanism 130 is in an unavailable state, and the valve assembly 120 cannot be controlled. When fueling is needed, the vacuum cap can make the drive mechanism in a locked state, and the valve assembly can be opened so that fuel can enter the gun body for fueling. When the tank is full, the vacuum cap can make the drive mechanism in an unlocked state, and the valve assembly can be automatically closed, so that fueling can be stopped, and the automatic shut-off of the fueling gun can be achieved.

[0035] The structures of the fueling gun will be described in detail below.

[0036] In some embodiments, the gun body 110 can include multiple chambers for accommodating various components of the fueling gun, including but not limited to a valve assembly chamber for accommodating the valve assembly 120, a drive mechanism chamber for accommodating the drive mechanism 130, a gun tube assembly chamber for accommodating at least part of the gun tube assembly 150, and a vacuum cap chamber for accommodating the vacuum cap 160. According to an embodiment of the present application, the gun body 110 can be injection molded, and the material thereof can be metal or alloy, such as aluminum or stainless steel.

[0037] In some embodiments, the gun body 110 can further include a fuel passage 104 disposed between the fuel inlet 101 and the fuel outlet 102, which can define a passage for fuel to pass through the gun body 110 and enter the vehicle tank. In some embodiments, the fueling gun of the present application also has a fuel vapor (which can be referred to as "fuel gas" for short) recovery function, and the gun body 110 can further include a gas passage 105, which can define a passage for fuel vapor to pass through the gun body 110 and be recovered into the fueling machine.

[0038] In some embodiments, the gun body 110 can include an oil pressure passage 106 and an air pressure passage 107. Fuel can pass through the oil pressure passage 106 to the vacuum cap 160, and the oil pressure provided by the fuel can lock the drive mechanism 130 with the vacuum cap 160, so that the drive mechanism 130 enters an available state. One end of the air pressure passage 107 is connected to the vacuum cap chamber. When air in the vacuum cap 160 is extracted through the air pressure passage 107, the vacuum cap can be separated from the drive mechanism 130, so that the drive mechanism 130 enters an unavailable state. In some embodiments, the oil pressure passage 106 is connected between the valve assembly chamber and the vacuum cap chamber. In some embodiments, the connection point of the oil pressure passage and the valve assembly is closer to the fuel inlet of the gun body than the valve assembly, so that fuel can enter the vacuum cap through the oil pressure passage 106 without passing through the valve assembly, lock the drive mechanism, and make the drive mechanism in a usable state, so that the valve assembly can be opened.

[0039] Reference Figure 1C In some embodiments, the valve assembly 120 is cylindrical as a whole, which can include a first valve seat 121 and a first valve core 122. The first valve seat 121 is arranged in the valve assembly cavity of the gun body near the oil inlet, and the first valve core 122 is arranged in the first valve seat.

[0040] In some embodiments, the first valve seat 121 can include a liquid passage 1211, which is in communication with the oil passage 104 of the gun body, and can be used to accommodate the passage of oil into the oil passage of the gun body. The first valve core 122 includes a valve stem 1221 and an oil passage valve core 1222 arranged on the valve stem, wherein the valve stem is arranged in the liquid passage 1211, and the oil passage valve core can control the communication between the liquid passage and the oil passage. When the oil passage valve core is pressed against the first valve seat, the liquid passage 1211 is not in communication with the oil passage 104. When the oil passage valve core is not pressed against the first valve seat, the liquid passage 1211 is in communication with the oil passage 104. In some embodiments, the valve stem 1221 is arranged concentrically with the liquid passage 1211 and can reciprocate in the liquid passage, which can drive the oil passage valve core to control the communication between the liquid passage 1211 and the oil passage 104.

[0041] In some embodiments, the first valve seat 121 can further include a gas passage 1212, which can be in communication with the gas passage 105 of the gun body 110, and can be used to accommodate the recovery of oil vapor. The first valve core 122 can further include a gas passage valve core 1223 arranged on the valve stem 1221, which can control the communication between the gas passage and the gas passage 105. When the gas passage valve core is pressed against the first valve seat, the gas passage 1212 is not in communication with the gas passage 105. When the gas passage valve core is not pressed against the first valve seat, the gas passage 1212 is in communication with the gas passage 105. In some embodiments, the gas passage 1212 is arranged concentrically with the liquid passage 1211, and the gas passage 1212 can be arranged inside the liquid passage 1211.

[0042] In some embodiments of the present application, the valve assembly 120 is cylindrical as a whole, which can control the communication of the gas passage and / or the liquid passage, and by arranging two different function valve cores on the same valve stem, synchronous adjustment can be achieved. As understood by those skilled in the art, the specific structure of the valve assembly of the present application can also be other structures, such as the valve assembly structure mentioned in the utility model patent application No. 201910935801.X, which can be incorporated by reference in its entirety into the present application.

[0043] In some embodiments, the driving mechanism 130 can include a driving shaft 131, a trigger 132, and a connecting piece 133. The driving shaft 131 can be arranged in the driving mechanism cavity of the gun body 110. The trigger 132 is arranged outside the gun body 110, and the connecting piece 133 is connected between the trigger 132 and the driving shaft 131. When the trigger is pulled, the connecting piece can push the trigger to move linearly in the driving mechanism cavity. In some embodiments, the gun body can include an opening, which can be located on one side or both sides of the gun body. The connecting piece 133 can be connected to the driving shaft in the driving mechanism cavity through the opening. The opening can also guide the connecting piece, so as to push the driving shaft to move linearly.

[0044] In some embodiments, one end of the connecting piece is rotatably connected to the gun body, and the other end is connected to the trigger. When the trigger is pulled, the connecting piece can rotate. The connecting piece extends into the gun body at the opening of the gun body, and can push the driving shaft to open the valve assembly, so as to refuel the motorcycle. When the motorcycle is refueled, the trigger needs to be released, the driving shaft is reset, and the valve assembly is automatically closed, so as to end the refueling.

[0045] In order to realize the automatic trigger release function of the refueling gun, that is, when the refueling is completed, the operator does not need to operate the trigger, and the automatic reset of the driving shaft can be realized. Referring to Figure 1D In some embodiments, the driving shaft 131 can be arranged in a split manner, which can include a connecting part 1311 and a driving part 1312. The connecting part 1311 is connected to the connecting piece 133, and the driving part 1312 is connected to the valve rod 1221 in the valve assembly 120. The connecting part 1311 and the driving part 1312 are independent of each other. The state of the connecting part 1311 and the driving part 1312 is controlled by the vacuum cap. When the connecting part 1311 and the driving part 1312 are locked, they form a whole and are in a usable state. When the trigger is pulled, the connecting piece 133 can push them to open the valve assembly. When the connecting part 1311 and the driving part 1312 are not locked, they are independent of each other and are in an unusable state. When the trigger is pulled, the connecting piece 133 can only push the connecting part to move.

[0046] The driving shaft of the present application is a split driving mechanism, which needs to be locked by a special "gear shifting" locking mechanism to form a whole structure. When the trigger is pulled, the driving mechanism can push the valve assembly. As understood by those skilled in the art, the specific structure of the driving mechanism of the present application can also be other structures, such as the structure of the driving mechanism mentioned in the utility model patent application No. 201910935801.X, which can be incorporated by reference in the present application.

[0047] Referring to Figure 2 , Figure 2Figure 1 is a schematic view of a resistance screen according to an embodiment of the present application. In some embodiments, the resistance screen 140 is circular and can be disposed on the end face of the first valve seat of the valve assembly proximate the oil inlet, and can completely cover the end face of the first valve seat. In some embodiments, the resistance screen 140 can include multiple regions. For example, a first region 141 covering the liquid passage and a second region 142 covering the gas passage.

[0048] In some embodiments, the resistance screen 140 can include multiple oil liquid through holes 143 that are in communication with the liquid passage and can be used to accommodate the passage of oil liquid into the liquid passage 1211 of the valve assembly. In some embodiments, the total flow area of the oil liquid through holes accounts for 3-5% of the flow area of the liquid passage, so as to shield part of the liquid passage and reduce the flow rate of the oil liquid entering the liquid passage. In some embodiments, the multiple oil liquid through holes 143 are uniformly distributed in the first region of the resistance screen covering the liquid passage. According to an embodiment of the present application, the resistance screen includes 12 oil liquid through holes with a diameter of 1 mm.

[0049] In some embodiments, the resistance screen 140 can also include gas through holes 144 that can be disposed in the second region of the resistance screen covering the gas passage and can be in communication with the gas passage. In some embodiments, the area of the gas through holes 144 can be the same as the cross-sectional area of the gas passage to avoid affecting the oil and gas recovery efficiency of the oil and gas. In some embodiments, the gas through holes can be located at the center of the resistance screen.

[0050] In some embodiments, the resistance screen 140 can also include reinforcing edges 145 that can be disposed at the edges of the first region and / or the second region and extend to one side or both sides of the resistance screen, and can be used to increase the strength of the resistance screen and also separate different regions of the resistance screen. In some embodiments, the reinforcing edges 145 can also be pressed against the first valve seat.

[0051] The resistance screen of the present application can effectively reduce the flow rate of the oil liquid, so as to reduce the flow rate of the oil gun and prevent the oil gun from splashing when refueling a motorcycle. In some embodiments, the oil gun of the present application can maintain the flow rate of the oil gun at 2.5-11.5 LPM. To ensure that the oil gun can achieve the automatic jump function when refueling at a low flow rate, the present application improves the gun barrel assembly and the vacuum cap. Specifically as follows:

[0052] Reference Figure 3 , Figure 3Figure 1 is a schematic diagram of a gun barrel assembly according to an embodiment of the present application. In some embodiments, the gun barrel assembly 150 can include an oil pipe 151, one end of which is disposed in the gun barrel assembly cavity and communicates with the oil passage 104 of the gun body 110, and the other end of which is disposed outside the gun body and can be inserted into the oil tank of a motorcycle, so that the motorcycle can be refueled.

[0053] In some embodiments, the gun barrel assembly 150 can further include an air pipe 152, which can be sleeved outside part of the oil pipe 151, and the gap between the air pipe and the oil pipe can be used to collect oil vapor and communicate with the gas passage 105 on the gun body, so that the oil vapor can be recovered. In some embodiments, the air pipe 152 can also be disposed with one end in the gun barrel assembly cavity and the other end inserted into the oil tank, so as to facilitate the collection of oil vapor.

[0054] In some embodiments, the gun barrel assembly 150 can further include a splash guard 154, which is sleeved outside the air pipe 152, so as to prevent oil vapor from overflowing into the air and oil from splashing out of the oil tank. Referring to Figure 1B According to an embodiment of the present application, the splash guard can be connected to the end of the air pipe extending towards the oil tank, so as to facilitate the entry of oil gas into the gap between the air pipe and the oil pipe.

[0055] In some embodiments, the gun barrel assembly 150 can further include a Venturi valve 153, which can be disposed in the gun barrel assembly cavity of the gun body and connected to the end of the oil pipe disposed in the gun barrel assembly cavity. In some embodiments, the Venturi valve 153 includes a second valve seat 1531 and a second valve core 1532, as well as a vacuum spring 1533, wherein one end of the second valve seat is connected to the liquid passage of the gun body 110, and the other end is connected to the oil pipe. The second valve core 1532 can act on the second valve seat 1531 to block the passage of oil, and the vacuum spring 1533 is disposed between the second valve seat and the second valve core, and can be used for the second valve core to reset the second valve seat. In some embodiments, the stiffness of the vacuum spring can be greater than 0.7 N / mm, and when the second valve core is pressed against the second valve seat under the action of the vacuum spring, the installation height of the vacuum spring is not greater than 16 mm, and the spring force is greater than 8 N.

[0056] According to an embodiment of the present application, the contact surface between the second valve core 1532 and the second valve seat 1531 is a bevel. When the oil presses the second valve core away from the second valve seat, the oil passing through the second valve core 1532 will produce a "Venturi" effect, forming a vacuum, and the second valve seat 1531 can include one or more vacuum holes 1534 that communicate the contact between the second valve seat 1531 and the second valve core 1532 with the outside of the second valve seat, for supplementing air to make up for the vacuum formed by the "Venturi" effect of the Venturi valve, and maintaining the balance of air pressure.

[0057] In some embodiments, the venturi valve has two air inlets: one is through the vacuum channel 108, which can connect the venturi valve with the outside of the oil gun. The vacuum channel 108 includes two parts, where the first part extends along the oil pipe 151, and the second part is arranged on the gun body 110. The other is through the air pressure channel 107 from the vacuum cap cavity. Among them, the vacuum hole 1534 can correspond to the position of the air pressure channel 107 and / or the vacuum channel 108 on the gun body 110.

[0058] The gun pipe assembly of the present application can be adjusted by adjusting the structure of the venturi valve, so that the venturi valve can convert more "vacuum degree" from the "flow rate" of the oil, and the vacuum degree of the oil gun at low flow rate can be improved. As understood by those skilled in the art, the specific structure of the gun pipe assembly of the present application can also be other structures, such as the gun pipe assembly structure mentioned in the utility model patent application No. 201910935801.X, which can be incorporated by reference in its entirety into the present application.

[0059] Reference Figure 4 , Figure 4 is a schematic diagram of a vacuum cap according to an embodiment of the present application. In some embodiments, the vacuum cap 160 can include a cap cover 161 and a base 162. Among them, the cap cover 161 is a hollow cylinder as a whole, which is arranged on the base 162 to form the internal space of the vacuum cap. The base 162 is fixed in the vacuum cap cavity and provides a basis for other parts of the vacuum cap 160. In some embodiments, the side of the cap cover 161 can include one or more through holes 1611, which can communicate the inside and outside of the cap cover 161, and can be part of the oil pressure channel 106 on the gun body 110, facilitating the oil entering the internal space of the vacuum cap through the oil pressure channel 106. In some embodiments, the cap cover 161 and the base 162 can include a certain spacing 1612 therebetween, and the position of the spacing between the two can define the air pressure channel 107 of the gun body 110. In some cases, the air pressure channel 107 can suck air between the cap cover 161 and the base 162.

[0060] In some embodiments, the vacuum cap 160 can further include a piston 163 and a self-sealing spring 164. Among them, the piston 163 is arranged inside the cap cover 161 and can move up and down in the inside of the cap cover 161, and the self-sealing spring 164 is arranged between the piston 163 and the base 162, and can be used to restore the position of the piston 163. In some embodiments, the oil from the oil pressure channel 106 can enter between the cap cover 161 and the piston 163 through the through hole 1611 on the cap cover. Under the action of oil pressure, the piston 163 will be pushed downward by the oil; when the oil pressure decreases or there is no oil pressure, the self-sealing spring 164 will push the piston 163 upward to return to the initial position.

[0061] In some embodiments, the vacuum cap 160 can further include a diaphragm 165 and a snap spring 166. The diaphragm 165 is arranged between the base and the step of the gun body vacuum cap cavity, which can be used to isolate the air above and below the base. The snap spring 166 is arranged between the piston 163 and the diaphragm 165, which can be used for automatic reset of the diaphragm. In some embodiments, the diaphragm 165 and the piston 163 are respectively arranged on both sides of the base 162, defining a gas part in the vacuum cap. The gas passage on the gun body 110 is in communication with the gas part. When the gas passage sucks the gas in the gas part, the diaphragm is sucked upward under the action of the gas suction force. When the gas suction force decreases or there is no gas suction force, the snap spring pushes the diaphragm downward to return to the initial position.

[0062] In some embodiments, the diaphragm includes one or more up-and-down concave-convex corrugations from the center to the periphery, which can provide sufficient amplitude for diaphragm deformation and reduce the difficulty of diaphragm deformation. In some embodiments, the stiffness of the snap spring can be less than 2N / mm. When the diaphragm is in the initial position, the installation height of the snap spring is not less than 8.7mm, and the spring force is less than 2N, so as to facilitate the reduction of the difficulty of diaphragm deformation.

[0063] In some embodiments, the vacuum cap 160 can further include a blocking pin seat 167 arranged below the diaphragm, which can move up and down with the diaphragm. When the blocking pin moves downward to the second position, it can lock the drive shaft of the drive mechanism. When the blocking pin moves upward to the first position, it can unlock the drive shaft. In some embodiments, the blocking pin seat 167 is provided with a blocking pin 1671, which can move linearly in the blocking pin seat and can lock the drive shaft.

[0064] The working process of the vacuum cap is as follows: for the oil part, when the oil enters the vacuum cap, the oil pressure pushes the piston downward, which in turn pushes the compression self-sealing spring and the snap spring; the snap spring continues to push the diaphragm downward, so that the blocking pin of the blocking pin seat falls into the drive mechanism, and the drive mechanism is locked; when the oil is removed from the vacuum cap, there is no oil pressure, the self-sealing spring pushes the piston upward, and the diaphragm is lifted, driving the blocking pin seat to move upward, so that the blocking pin is separated from the drive mechanism, and the state of the drive mechanism changes to the unlocked state; for the gas part, when the gas between the piston and the diaphragm is extracted, the diaphragm moves upward, compressing the snap spring, lifting the diaphragm, driving the blocking pin seat to move upward, so that the blocking pin is separated from the drive mechanism, and the state of the drive mechanism changes to the unlocked state. When the drive mechanism is in the unlocked state, the drive mechanism cannot be used to drive the valve assembly, the oil passage and / or the gas passage are cut off, and the oil gun automatically stops refueling.

[0065] The vacuum cap of the present application can control the driving mechanism, and actually change between the locked state and the unlocked state, so as to adapt to different refueling modes of the refueling gun. Through the structural adjustment of the vacuum cap, the refueling gun can realize the automatic jump gun function at a flow rate of at least 2.5 LPM. As understood by those skilled in the art, the specific structure of the vacuum cap of the present application can also be other structures, such as the vacuum cap structure mentioned in the utility model patent application No. 201910935801.X, which can be incorporated by reference in its entirety into the present application.

[0066] The refueling gun of the present application can realize low flow rate refueling, and can adapt to the characteristics and needs of motorcycle fuel tanks, and can effectively solve the drawbacks of motorcycle refueling. Referring to Figure 5 , Figure 5 is a refueling pressure curve change diagram according to an embodiment of the present application. As shown in the figure, the refueling pressure curve of the refueling gun of the present application is close to linear change, and even if the refueling machine pressure fluctuates within 50%, it can be maintained within the flow rate range of 2.5-11.5 LPM, and automatic jump gun can also be realized within this range. So that the motorcycle can hang the trigger of the oil gun on the gear of the oil gun during refueling, without the need for the operator to manually control continuously to complete smooth refueling. Can effectively reduce the risk of personnel fatigue and full jump gun.

[0067] And the splash guard of the current refueling gun cannot adapt to motorcycle refueling, and the present application also improves the splash guard. Specifically as follows:

[0068] Figures 6A-6C is a schematic diagram of the splash guard according to an embodiment of the present application.

[0069] As shown in the figure, the splash guard 600 can include a housing 610 and a rigid support 620. The housing 610 can include a connecting portion 611, a turning portion 612, and an extension portion 613, the connecting portion 611 can be connected with the refueling gun, the turning portion 612 is located between the connecting portion 611 and the extension portion 613, the first end surface of the extension portion 613 is connected with the turning portion 612, and the second end surface can cover the motorcycle fuel tank opening. The rigid support 620 is arranged in the extension portion 613 of the housing, which can improve the support strength of the splash guard, and when the extension portion of the housing covers the motorcycle fuel tank opening, it can support the refueling gun, so that the operator does not need to hold the refueling gun, and the fatigue of the operator can be reduced.

[0070] In some embodiments, the housing 610 can be a soft material, such as fluoroelastomer, nitrile rubber, polyurethane, etc. In some embodiments, the housing 610 can be integrally formed, and is sleeved on the air pipe through the connecting portion 611, and the axis of the connecting portion coincides with the axis of the air pipe.

[0071] In some embodiments, the transition portion 612 can include one or more corrugated folds 6121, which can allow the outer shell of the splash guard to compress on the fuel tank opening of the motorcycle during refueling. In some embodiments, the folds 6121 propagate in a direction that is convexly curved perpendicular to the axis of the connecting portion, which facilitates the axial compression and retraction of the outer shell during refueling, facilitates the production process demolding action of the splash guard, reduces the production cost of the splash guard, and facilitates the expansion of the diameter of the outer shell from the connecting portion to the extension portion.

[0072] In some embodiments, the extension portion 613 is tapered as a whole, with its peripheral size gradually increasing from the first end face to the second end face, so that the second end of the extension portion can completely cover the fuel tank opening of the motorcycle. In some embodiments, the first end face of the extension portion 613 connected to the transition portion 612 is inclined, so that the extension portion can adapt to the bending direction of the oil pipe. In some embodiments, the plane of the first end face is perpendicular to the axis of the connecting portion. In some embodiments, the extension portion 613 is bent relative to the connecting portion 611, so as to adapt to the structure of the oil gun oil pipe. In some embodiments, the angle θ between the axis of the extension portion and the axis of the connecting portion can be 175°-140°. In some embodiments, the extension portion 613 can extend to the end of the oil pipe inserted into the oil gun, and as close to the end of the oil pipe as possible, so that when the oil gun is refueling the motorcycle, the oil pipe can be inserted into the fuel tank, and the extension portion can cover the fuel tank opening. In some embodiments, the distance between the second end face of the extension portion and the end of the oil gun inserted into the fuel tank is 30mm-70mm, preferably 50mm.

[0073] In some embodiments, the rigid support 620 has the same shape as the extension portion, and is completely fitted with the extension portion. The extension portion can wrap the rigid support, and the rigid support can support the longer extension portion and improve the strength of the extension portion. In some embodiments, the rigid support can be a support ring or a hollow support ring. The material of the rigid support can be metal, such as stainless steel, aluminum alloy, etc., or non-metal, such as polyformaldehyde, nylon, etc.

[0074] Reference Figure 7 , Figure 7 Figure 1 is a schematic diagram of a refueling scene according to an embodiment of the present application. The splash guard of the present application can completely cover the fuel tank opening during refueling by adding an extension portion to the splash guard, which can effectively recover oil vapor and prevent oil from splashing outside the fuel tank. Moreover, the splash guard of the present application adds a rigid support in the extension portion, which can provide stable support for the oil gun by allowing the oil gun to rest on the rigid support inside the splash guard during refueling, thereby reducing the fatigue of the operator who holds the oil gun for a long time.

[0075] The above merely describes a specific implementation of the present application. Those skilled in the art can clearly understand the specific working processes of the system, modules and units described above for the convenience and brevity of description, and can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein again. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A splash guard for a motorcycle fueling gun, comprising: The housing, characterized in that the housing comprises a connecting part, a turning part and an extending part, the connecting part is connected with the fuel gun, the turning part is between the connecting part and the extending part, the first end surface of the extending part is connected with the turning part, and the second end surface can cover the motorcycle fuel tank opening; and a rigid support is arranged in the extending part of the housing, and is used for supporting the fuel gun when the extending part covers the motorcycle fuel opening.

2. Splash guard shield for a motorcycle fuel gun according to claim 1, characterized in that, The turning part comprises one or more corrugated folds which are concave-convex bent along the direction perpendicular to the axis of the connecting part.

3. Splash guard shield for a motorcycle fuel gun according to claim 1, characterized in that, The angle between the axis of the extending part and the axis of the connecting part is 175°-140°.

4. Splash guard shield for a motorcycle fuel filler neck according to claim 1, characterized in that Wherein, the plane where the first end surface of the extending part is located is perpendicular to the direction of the axis of the connecting part.

5. Splash guard shield for a motorcycle fuel gun according to claim 1, characterized in that, The peripheral size of the extending part gradually increases from the first end surface to the second end surface.

6. Splash guard according to claim 1, characterized in that The shape of the rigid support is the same as the shape of the extending part, and the extending part is wrapped on the rigid support.

7. Splash guard shield for a motorbike fuel gun according to claim 1, characterized in that, The rigid support is a support ring or a hollow support ring.

8. A refueling gun for motorcycles, comprising: The gun body is characterized in that the gun barrel assembly cavity of the gun body is provided with a gun barrel assembly and a splash-proof cover for a motorcycle fuel gun according to any one of claims 1-7.

9. Refuelling gun for motorbikes according to claim 8, characterized in that, The gun barrel assembly comprises an oil pipe and an air pipe, the first end of the oil pipe is arranged in the gun barrel of the gun barrel assembly, and the second end extends outward from the gun body, the air pipe is sleeved on the oil pipe and connected with the first end of the oil pipe.

10. Refuelling gun for motorbikes according to claim 9, characterized in that, The connecting part is connected with the air pipe, the extending part extends to the second end of the oil pipe, and the distance between the second end surface of the extending part and the second end of the oil pipe is 30mm-70mm.

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