Oil gun for oiling motorcycle

Abstract

The utility model relates to a refueling gun for refueling a motorcycle, which comprises a gun body which comprises an oil inlet, an oil outlet and an oil channel which is arranged between the oil inlet and the oil outlet and is used for oil to pass through; the valve assembly is arranged in a valve assembly cavity at the oil inlet of the gun body and is used for allowing or preventing oil liquid from entering the oil liquid channel; the driving mechanism is arranged in the driving mechanism cavity of the gun body and is used for controlling opening or closing of the valve assembly; at least part of the gun barrel assembly is arranged in a gun barrel assembly cavity at the oil outlet of the gun body, and the gun barrel assembly is connected with the oil liquid channel; and a resistance filter screen is arranged on the valve assembly, is close to the oil inlet of the gun body, and is used for reducing the flow rate of oil entering the oil channel. According to the oil gun, the oil filling flow speed can be effectively reduced, low-flow-speed oil filling of a motorcycle can be achieved, and fatigue of operators can be relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of motorcycle refueling, in particular to a refueling gun for motorcycle refueling. 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 small 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, there are some problems in the current refueling of motorcycles. The traditional refueling gun design mainly serves the automobile industry and does not fully consider the special needs of motorcycle fuel tanks. During the refueling of motorcycles, due to the small volume of the fuel tank and the shallow inlet pipe of the fuel tank, a stable low flow rate is usually required for refueling to prevent fuel from splashing. Ideally, the refueling flow rate should be maintained at around 10 liters per minute (LPM). However, the flow rate of existing refueling guns is relatively high, and even if the lowest flow rate is selected, the actual flow rate is still much higher than the demand for motorcycle refueling.

[0004] In this case, when refueling a motorcycle, the operator has to manually hold the trigger of the refueling gun to control the flow rate at a lower level for fueling. The opening force of the refueling gun trigger is generally between 30 and 60 Newtons (N), which continuously pulls the trigger during the entire refueling process, not only causing the operator to become tired, but also making it difficult to maintain the stability of the flow rate. There is an urgent need in the art for a refueling gun that can adapt to the characteristics and needs of motorcycle fuel tanks. SUMMARY

[0005] To solve the technical problems existing in the prior art, the utility model provides a refueling gun for motorcycle refueling, which can effectively reduce the refueling flow rate of the refueling gun, achieve low flow rate refueling of motorcycles, avoid oil splashing, and reduce operator fatigue without the need for the operator to manually hold the refueling gun trigger for a long time during refueling.

[0006] The application provides a refueling gun for motorcycles, comprising: a gun body comprising an oil inlet, an oil outlet, and an oil passage for oil to pass through between the oil inlet and the oil outlet; a valve assembly comprising: a first valve seat arranged in a valve assembly cavity at the oil inlet of the gun body, and comprising a liquid passage in communication with the oil passage; and a first valve core comprising a valve rod concentrically arranged with the liquid passage, and a liquid passage valve core arranged on the valve rod to control the communication between the liquid passage and the oil passage; a driving mechanism comprising a driving shaft arranged in a driving mechanism cavity of the gun body and coupled with the valve rod, a trigger, and a connecting piece connected with the driving shaft and the trigger; the connecting piece pushes the driving shaft to move towards the valve rod, and the liquid passage valve core on the valve rod controls the communication between the liquid passage and the oil passage; a gun barrel assembly comprising an oil pipe, one end of the oil pipe being arranged in a gun barrel assembly cavity of the gun body, the other end of the oil pipe being arranged outside the gun body and being connected with the oil passage; and a resistance filter screen arranged on the valve assembly, the resistance filter screen being arranged on an end face of the first valve seat close to the oil inlet, covering the oil passage, and shielding at least part of the oil passage to reduce the flow rate of oil entering the oil passage.

[0007] The refueling gun for motorcycles as described above, the gun barrel assembly comprises an air pipe, the air pipe is sleeved on part of the oil pipe and is close to the gun body, and a gap between the air pipe and the oil pipe is used for collecting oil vapor, and the gun body further comprises a gas passage for recovering oil vapor.

[0008] The refueling gun for motorcycles as described above, the valve assembly can control oil vapor to pass through the gas passage, the first valve seat further comprises a gas passage concentrically arranged with the liquid passage and in communication with the gas passage, and the first valve core further comprises a gas passage valve core arranged on the valve rod to control the communication of the gas passage.

[0009] The refueling gun for motorcycles as described above, the resistance filter screen comprises a plurality of oil passage holes in communication with the liquid passage, and the flow area of the oil passage holes accounts for 3%-5% of the flow area of the liquid passage.

[0010] The refueling gun for motorcycles as described above, the resistance filter screen further comprises a gas passage hole arranged at the center of the resistance filter screen and in communication with the gas passage.

[0011] The refueling gun for motorcycles as described above, the resistance filter screen comprises a reinforcing edge arranged at the edge of the resistance filter screen and / or the gas passage hole and extending to one side or both sides of the resistance filter screen.

[0012] The fuel gun for refueling motorcycles as described above, the gun barrel assembly further comprises a venturi valve arranged in the gun barrel assembly cavity and connected with the oil pipe for detecting the refueling condition of the vehicle, the venturi valve is connected with the outside of the fuel gun and comprises a vacuum passage, the vacuum passage comprises a first part extending along the oil pipe and a second part located in the gun body.

[0013] The fuel gun for refueling motorcycles as described above, the venturi valve comprises a second valve seat, a second valve core and a vacuum spring arranged between the second valve seat and the second valve core and capable of controlling the second valve core to move between a first position and a second position of the second valve seat; wherein the stiffness of the vacuum spring is above 0.7 N / mm, when the second valve core is located at the first position, the second valve core is pressed on the second valve seat, the installation height of the vacuum spring is not more than 16 mm, and the spring force is above 8 N.

[0014] The fuel gun for refueling motorcycles as described above, the drive shaft comprises a drive part and a connecting part, the drive part is coupled with the valve rod, the connecting part is connected with the connecting piece, and the connecting part is separable from the drive part; when the connecting part and the drive part are separated, the drive shaft is in an unusable state; when the connecting part and the drive part are locked, the drive shaft is in an available state.

[0015] The fuel gun for refueling motorcycles as described above, further comprising a vacuum cap capable of locking the drive part and the connecting part, arranged in the vacuum cap cavity of the gun body, the vacuum cap comprising a cap, a base, a piston, a self-sealing spring, a diaphragm, a gun spring and a blocking pin seat, the cap is arranged above the base, the piston is arranged in the cap and is movable along the cap, the self-sealing spring is arranged between the piston and the base and is used to restore the position of the piston, the diaphragm is arranged below the base and is used to separate the vacuum cap cavity and the drive mechanism cavity, the blocking pin seat is arranged below the diaphragm and is connected with the diaphragm and the piston and extends into the drive mechanism cavity and is movable between a first position and a second position, when the blocking pin seat is located at the second position, the blocking pin seat locks the drive part and the connecting part, the gun spring is arranged between the diaphragm and the piston and controls the distance between the diaphragm and the piston; wherein the diaphragm comprises one or more concave-convex corrugations from the center to the periphery, the stiffness of the gun spring is below 2 N / mm, the installation height of the gun spring is not less than 8.7 mm when the blocking pin seat is located at the first position, and the spring force is below 2 N.

[0016] The refueling gun of the application can realize low flow rate refueling of a motorcycle, avoid splashing of oil, and does not require an operator to manually hold the trigger of the refueling gun for a long time, thereby reducing fatigue of the operator, and the refueling gun of the application can also realize automatic jump refueling at a low flow rate. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the application will be further described in detail below 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 application;

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

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

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

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

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

[0024] Figure 7 a schematic diagram of a refueling scene according to an embodiment of the 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] This application discloses a fuel nozzle (or simply "fuel nozzle") for refueling motorcycles. This fuel nozzle can maintain a stable low flow rate for refueling, is adaptable to motorcycle fuel tanks, and prevents fuel splashing. Furthermore, during refueling, the trigger of the fuel nozzle can be engaged in the fuel nozzle stop position, eliminating the need for continuous trigger control by the operator and reducing operator fatigue. Moreover, this fuel nozzle also features a self-sealing function during low-speed refueling, automatically shutting off the nozzle without requiring visual observation of the refueling process, thus meeting various refueling needs.

[0030] The technical solution of this utility model is further illustrated below through specific embodiments. Those skilled in the art should understand that, based on the teachings of the following embodiments, other alternative solutions capable of achieving the same or similar functions are possible. These alternative solutions are also within the protection scope of this utility model.

[0031] Figures 1A-1D This is a schematic diagram of a refueling nozzle according to one embodiment of the present application. Figure 1A A 3D diagram of a fuel nozzle. Figure 1B This is a cross-sectional view of the fuel nozzle. Figure 1C and Figure 1D This is a magnified view of a section of the refueling nozzle.

[0032] As shown in the figure, the fuel nozzle 100 includes: a nozzle body 110, a valve assembly 120, a drive mechanism 130, a resistance filter 140, and a barrel assembly 150. The nozzle body 110 includes an inlet 101 and an outlet 102. The inlet 101 can be connected to a hose via an inlet thread, thus connecting the nozzle to a fuel dispenser. Fuel from the fuel dispenser enters the nozzle body through the inlet and exits through the outlet. The valve assembly 120 is located on the nozzle body 110 near the inlet and controls the flow of fuel into the nozzle. The drive mechanism 130 is located on the nozzle body 110 and connected to the valve assembly, used to control the valve assembly. The barrel assembly 150 is located on the nozzle body near the outlet and can extend into the motorcycle's fuel tank to add fuel from the nozzle's outlet to the tank. The resistance filter 140 is located on the valve assembly and near the oil inlet of the gun body. It can be used to reduce the flow rate of oil into the gun body to suit motorcycle refueling.

[0033] 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.

[0034] The structures of the fueling gun will be described in detail below.

[0035] 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 nozzle assembly chamber for accommodating at least part of the nozzle 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.

[0036] 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.

[0037] 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 cause the vacuum cap 160 to lock the drive mechanism 130 and make it available. One end of the air pressure passage 107 is connected to the vacuum cap chamber, and 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 and made unavailable. 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 to 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, make the drive mechanism available, and thus open the valve assembly.

[0038] 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.

[0039] 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.

[0040] 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 on the inner side of the liquid passage 1211.

[0041] 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 the present application.

[0042] 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.

[0043] 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 finishes refueling, the trigger needs to be released, the driving shaft is reset, and the valve assembly is automatically closed, so as to end the refueling.

[0044] 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. 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.

[0045] The driving shaft of the present application is a split driving mechanism, which needs to be locked by a special "gear 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 into the present application.

[0046] Reference Figure 2 , Figure 2Figure 1 shows a schematic view of a resistance screen according to an embodiment of the present application. In some embodiments, the resistance screen 140 is circular, which can be arranged on the end face of the first valve seat of the valve assembly near 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.

[0047] In some embodiments, the resistance screen 140 can include multiple oil liquid through holes 143, which are in communication with the liquid passage and can be used to accommodate the flow 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 evenly 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.

[0048] In some embodiments, the resistance screen 140 can also include gas through holes 144, which can be arranged 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, so as 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.

[0049] In some embodiments, the resistance screen 140 can also include reinforcing edges 145, which can be arranged at the edges of the first region and / or the second region and extend to one side or both sides of the resistance screen, which 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.

[0050] 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 keep the flow rate of the oil gun at 2.5-11.5 LPM. In order to ensure that the oil gun can realize the automatic jump function when refueling at a low flow rate, the barrel assembly and the vacuum cap of the present application are improved. Specifically as follows:

[0051] 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.

[0052] 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 have one end disposed in the gun barrel assembly cavity and the other end inserted into the oil tank, so as to facilitate the collection of oil vapor.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Reference Figure 4 , Figure 4 is a schematic view 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 in the form of 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 become 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, a certain gap 1612 can be included between the cap cover 161 and the base 162, and the position of the gap 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.

[0059] In some embodiments, the vacuum cap 160 can also 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, which 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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:

[0067] Figures 6A-6C is a schematic diagram of the splash guard according to an embodiment of the present application.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 fueling gun for motorcycles, comprising: a gun body comprising an oil inlet and an oil outlet, and an oil passage for oil to pass between the oil inlet and the oil outlet; a valve assembly comprising a first valve seat and a first valve core, the first valve seat being disposed in a valve assembly cavity at the oil inlet of the gun body and comprising a liquid passage, the liquid passage being in communication with the oil passage, the first valve core comprising a valve stem concentrically disposed with the liquid passage, and a liquid passage valve core disposed on the valve stem, the liquid passage valve core controlling the communication between the liquid passage and the oil passage; a drive mechanism comprising a drive shaft, a trigger, and a connecting member connected to the drive shaft and the trigger, the drive shaft being disposed in a drive mechanism cavity of the gun body and coupled to the valve stem, pulling the trigger, the connecting member pushing the drive shaft to move towards the valve stem, the liquid passage valve core on the valve stem controlling the communication between the liquid passage and the oil passage; a gun tube assembly comprising an oil tube, one end of the oil tube being disposed in a gun tube assembly cavity of the gun body, the other end of the oil tube being disposed outside the gun body and being connected to the oil passage; and characterized in that the valve assembly is provided with a resistance filter screen, the resistance filter screen being disposed on an end face of the first valve seat close to the oil inlet, covering the liquid passage and shielding at least part of the liquid passage, for reducing the flow rate of oil entering the liquid passage.

2. Refuelling gun for motorbikes according to claim 1, characterised in that, The gun tube assembly comprises an air tube, the air tube being sleeved on part of the oil tube and being close to the gun body, the gap between the air tube and the oil tube being used for collecting oil vapor, the gun body further comprising a gas passage for oil vapor recovery.

3. Refuelling gun for motorbikes according to claim 2, characterised in that, The valve assembly can control oil vapor to pass through the gas passage, the first valve seat further comprising a gas passage concentrically disposed with the liquid passage and in communication with the gas passage, the first valve core further comprising a gas passage valve core disposed on the valve stem, the gas passage valve core controlling the communication of the gas passage.

4. Refuelling gun for motorbikes according to claim 3, characterised in that, The resistance filter screen comprises a plurality of oil passage holes in communication with the liquid passage, the flow area of the oil passage holes accounting for 3%-5% of the flow area of the liquid passage.

5. Refuelling gun for motorbikes according to claim 4, characterised in that, The resistance filter screen further comprises a gas passage hole disposed at the center of the resistance filter screen and in communication with the gas passage.

6. Refuelling gun for motorbikes according to claim 5, characterized in that, The resistance filter screen comprises a reinforcing edge disposed at the edge of the resistance filter screen and / or the gas passage hole and extending to one side or both sides of the resistance filter screen.

7. Refuelling gun for motor vehicles according to claim 1, characterised in that, The gun tube assembly further comprises a Venturi valve disposed in the gun tube assembly cavity and connected to the oil tube, for detecting the fueling condition of the vehicle, the Venturi valve being in communication with the outside of the fueling gun comprising a vacuum passage, the vacuum passage comprising a first part extending along the oil tube and a second part located in the gun body.

8. Refuelling gun for motorbikes according to claim 7, characterized in that, The venturi valve comprises a second valve seat, a second valve core and a vacuum spring arranged between the second valve seat and the second valve core and capable of controlling the second valve core to move between a first position and a second position of the second valve seat; wherein the stiffness of the vacuum spring is above 0.7 N / mm, the second valve core is pressed on the second valve seat when the second valve core is in the first position, the installation height of the vacuum spring is not more than 16 mm, and the spring force is above 8 N.

9. Refuelling gun for motorbikes according to claim 7, characterised in that, The drive shaft comprises a driving part and a connecting part, the driving part is coupled with the valve rod, the connecting part is connected with the connecting piece, and the connecting part is separable from the driving part; when the connecting part and the driving part are separated, the drive shaft is in an unusable state; when the connecting part and the driving part are locked, the drive shaft is in a usable state.

10. Refuelling gun for motor vehicles according to claim 9, characterized in that, Further comprising a vacuum cap capable of locking the driving part and the connecting part, which is arranged in a vacuum cap cavity of the gun body, the vacuum cap comprises a cap cover, a base, a piston, a self-sealing spring, a diaphragm, a jump gun spring and a blocking pin seat, the cap cover is arranged above the base, the piston is arranged in the cap cover and is movable along the cap cover, the self-sealing spring is arranged between the piston and the base and is used to restore the position of the piston, the diaphragm is arranged below the base and is used to separate the vacuum cap cavity and the driving mechanism cavity, the blocking pin seat is arranged below the diaphragm, is connected with the diaphragm and / or the piston and extends into the driving mechanism cavity, and is movable between a first position and a second position; when the blocking pin seat is in the second position, the blocking pin seat locks the driving part and the connecting part, the jump gun spring is arranged between the diaphragm and the piston and controls the distance between the diaphragm and the piston; wherein the diaphragm comprises one or more concave-convex corrugations from the center to the periphery, the stiffness of the jump gun spring is below 2 N / mm, the installation height of the jump gun spring is not less than 8.7 mm when the blocking pin seat is in the first position, and the spring force is below 2 N.

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