CN110734033A - oil gun - Google Patents

Abstract

The invention relates to an oil gun, which comprises a gun body, a valve component and a barrel component, wherein the gun body comprises a liquid channel for oil to pass through, the valve component is arranged in a valve component cavity of the gun body and is configured to allow or prevent the oil from passing through the liquid channel, a driving mechanism is arranged in a driving mechanism cavity of the gun body and is configured to control the opening or closing of the valve component, the barrel component is at least partially arranged in a barrel component cavity of the gun body and is configured to accommodate the liquid channel, the barrel component comprises a Venturi valve which is arranged in the barrel component cavity, and the oil gun is reasonable in structure, facilitates the formation of the unobstructed oil and gas channel and is more convenient to maintain.

Description

oil gun

Technical Field

The invention relates to the field of refueling equipment, in particular to an fuel filling gun.

Background

With the development of science and technology and the improvement of living standard, automobiles enter more and more households. The increasing number of cars has led to an ever expanding construction of gasoline stations. In daily life, a gasoline station comprises: the system comprises a fuel storage tank arranged underground and a plurality of refueling devices connected with the fuel storage tank. Each refueling device fills oil into the automobile through a refueling gun on the refueling device.

However, oil products such as gasoline or diesel oil of the gas station are mostly volatile and have -fixed toxicity, and the ignition point is low, so that the oil gun with the oil gas recovery function is easily ignited, and has higher and higher requirements on the problems of environmental protection, safety and the like of the gas station along with the rising of the environmental protection requirement.

Disclosure of Invention

In view of the technical problems in the prior art, the invention provides oil guns, which comprise a gun body comprising a liquid passage for oil to pass through, a valve assembly arranged in a valve assembly cavity of the gun body and configured to allow or prevent the oil from passing through the liquid passage, a driving mechanism arranged in a driving mechanism cavity of the gun body and configured to control the opening or closing of the valve assembly, and a barrel assembly arranged at least partially in a barrel assembly cavity of the gun body and configured to accommodate the liquid passage, wherein the barrel assembly comprises a venturi valve arranged in the barrel assembly cavity.

The fuel gun as described above wherein the valve assembly chamber and the actuator chamber are co-located on the same axis of and the barrel assembly chamber and the valve assembly chamber and the actuator chamber are not co-located on the same axis of .

The fuel gun as described above wherein the barrel assembly includes a barrel having an end connected to the venturi valve and an end disposed outside the gun body.

The fuel nozzle as described above wherein the angle between the venturi valve and the drive mechanism is obtuse.

As with the fuel gun described above, step includes a vacuum passageway that communicates the venturi valve with an exterior of the fuel gun and is configured to replenish gas for the venturi valve, wherein the vacuum passageway includes a th portion extending along the barrel and a second portion located within the gun body.

The fuel gun as described above wherein the th section of the vacuum passageway is integral with the barrel.

The fuel gun as described above, wherein the gun body further includes a gas passage configured to recycle the collected oil vapor to the fuel dispenser, and wherein the barrel assembly further includes a gas tube extending at least partially along the barrel, the gas tube communicating with the gas passage in the gun body.

The fuel gun as described above further includes a connector that securely connects the air tube to the barrel or venturi valve.

The fuel gun as described above wherein the connector is configured to connect the th section of the vacuum passageway extending along the barrel to the second section of the vacuum passageway in the gun body while securing the air tube to the barrel but maintaining the vacuum passageway disconnected from the air passageway.

As with the fuel gun described above, step includes an attitude device disposed in the second portion of the vacuum passageway configured to control the opening and closing of the vacuum passageway according to different angles of the fuel gun.

The fuel gun as described above, wherein the posture means includes the moving member freely movable along the second portion of the vacuum passage, the vacuum passage is communicated when the inlet and outlet of the second portion of the vacuum passage are located on the side of the moving member , and the vacuum passage is blocked by the moving member when the inlet and outlet of the second portion of the vacuum passage are located on both sides of the moving member.

As with the fuel gun described above, step includes a vacuum cap disposed in a vacuum cap cavity of the gun body and configured to lock the drive mechanism in a usable state, wherein the vacuum cap cavity and the venturi valve include an air pressure passage therebetween.

The oil gun has reasonable structure, is beneficial to forming smooth oil and gas channels and is more convenient to maintain.

Drawings

A preferred embodiment of the present invention will now be described in further detail at with reference to the accompanying drawings, in which:

FIGS. 1A-1F are schematic diagrams of a structure of a fuel gun according to embodiments of the present application;

FIG. 2 is an exploded view of a fuel gun configuration according to embodiments of the present application;

3A-3D are schematic views of a valve assembly according to embodiments of the present application;

FIG. 4 is an exploded view of a valve assembly according to embodiments of the present application;

FIGS. 5A-5D are schematic views of a drive mechanism according to embodiments of the present application;

FIG. 6 is an exploded view of a drive mechanism according to embodiments of the present application;

7A-7D are schematic diagrams of vacuum caps according to embodiments of the present application;

FIG. 8 is an exploded view of a vacuum cap according to embodiments of the present application;

fig. 9A-9D are schematic diagrams of barrel assemblies according to embodiments of the present application, an

Fig. 10 is an exploded view of an barrel assembly according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of of the present invention, rather than all embodiments.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments in which like numerals may be used to describe substantially similar components in various figures.

The oil gun is connected with the oiling machine through a rubber pipe, oil enters the oil gun through the rubber pipe, passes through an oil path valve and a Venturi valve in the oil gun, flows out of a gun barrel and is added into an oil tank of a vehicle, a trigger on the oil gun can control the opening and closing of the oil path valve through a driving mechanism, a vacuum cap can lock the driving mechanism, in an oil-gas recovery function, steam of the oil is recovered into the oiling machine through a gas channel and the gas path valve, in the current design of the oil gun, the oil path valve, the Venturi valve, the gas path valve and the like are all intensively arranged at , so that the flow path of the oil is frequently changed, the flowing environment of the oil is complex, the energy of the oil is consumed, the flow rate of the oil gun is slow and the like, and the problems of assembly, maintenance and the like are caused by the centralized arrangement of a plurality of valves.

The application has provided kind of new design's nozzle in new design, the position of a plurality of valves has optimized in the nozzle, merges to whole or alternate segregation as far as possible to advance step and optimize the runner that fluid passed through, make this application nozzle possess when the high velocity of flow structure more reasonable, nozzle assembly and maintenance are comparatively convenient.

The present invention will be further illustrated by way of specific embodiments it will be appreciated by those skilled in the art that the following descriptions are provided only for the convenience of understanding the present invention and should not be used to limit the scope of the present invention.

FIGS. 1A-1F are schematic diagrams of structures of an embodiment fuel gun according to the present application, FIGS. 1A and 1B are perspective views of the fuel gun in different directions showing the overall shape thereof, FIG. 1C is a sectional view taken along line A-A in FIG. 1A, and FIGS. 1D-1F are sectional views taken along lines B-B, C-C, and D-D in FIG. 1C, respectively, showing the sectional shapes of the fuel guns, and FIG. 2 is an exploded view of a embodiment fuel gun according to the present application.

As shown, the fuel gun 100 includes a gun body 110 including an oil inlet 101 and an oil outlet 102. the oil inlet 101 can be connected to a hose by inlet threads and thereby connect the fuel gun to a fuel dispenser.

As shown, the fuel gun 100 further includes a valve assembly 120, a driving mechanism 130, a vacuum cap 140 and a barrel assembly 150 arranged from an oil inlet to an oil outlet of the gun body 110. the valve assembly 120 is used for allowing or preventing oil from passing through the gun body 110 and allowing or blocking oil vapor from being recovered and then passing through the gun body 110. the driving mechanism 130 is connected with the valve assembly 120, and controls the on-off of the valve assembly 120, so that oil and/or oil vapor can be controlled to pass through the valve assembly.A vacuum cap 140 is used for locking the driving mechanism 130. when the driving mechanism 130 is in a locked state, the driving mechanism 130 is formed as an whole, and is in an available state. when the driving mechanism 130 is in an unlocked state, the driving mechanism 130 is not available, and the opening and closing of the valve assembly 120 cannot be controlled.A barrel assembly 150 is arranged at the front of the gun body 110.

In some embodiments , gun body 110 further includes a plurality of chambers for receiving the various components of the fuel gun described above, including, but not limited to, a valve assembly chamber for receiving valve assembly 120, a drive mechanism chamber for receiving drive mechanism 130, a vacuum cap chamber for receiving vacuum cap 140, and a barrel assembly chamber for receiving at least a portion of barrel assembly 150.

In embodiments, the valve assembly chamber and the drive mechanism chamber are aligned substantially parallel, having substantially the same axis, to ensure that the fluid path remains substantially -induced orientation, the barrel assembly chamber and the valve assembly chamber and the drive mechanism chamber do not have substantially the same axis, but are angled at .

embodiments, the gun body 110 may further comprise a fluid passage 104 and a gas passage 105 between the valve assembly chamber and the barrel assembly chamber, wherein the fluid passage 104 defines a passage for oil to enter the vehicle tank through the gun body 110, and the gas passage 105 defines a passage for oil vapor to be recovered to the fuel dispenser through the gun body 110. in embodiments, the fluid passage 104 protrudes outside the gun body at a portion of the drive mechanism chamber to compensate for the oil passage occupied by the drive mechanism chamber so that the same flow area as the oil in the valve assembly avoids creating an area bottleneck and losing energy of the oil.

In , the gun body 110 may further include an oil pressure passage 106 between the valve assembly chamber and the vacuum cap chamber and an air pressure passage 107 between the vacuum cap chamber and the barrel assembly chamber, oil enters the vacuum cap 140 through the oil pressure passage 106, and the oil pressure provided by the oil pushes the vacuum cap 140 to lock the actuator 130 into an operable state, the end of the air pressure passage 107 is connected to the vacuum cap chamber and the end is connected to the venturi valve, which, when air is drawn from the vacuum cap 140 through the air pressure passage 107, disengages the actuator 130 into an inoperable state.

In embodiments, the fuel gun 100 further includes a trigger 160 located outside the gun body 110 and coupled to the drive mechanism 130 through a transition piece 161 that can be used to control the drive mechanism embodiments include a transition piece 161 also located outside the gun body and having its end coupled to the trigger 160. either or both sides of the gun body 110 include an opening 103 and the other end of the transition piece 161 is coupled to the drive mechanism 130 through the opening 103. in a locked state, when the trigger 160 is pulled, the drive mechanism 130 can be pushed through the transition piece 161 to control the valve assembly 120.

In the fuel gun may further include a trigger 164 that is disposed outside of the trigger 160 and removably attached to the gun body 110 for hand protection during refueling, in the trigger 164 may include or more pins 165 that engage the trigger 160 to facilitate operator retention of the trigger 160 during refueling, accordingly, the trigger 160 may also include snap features that are disposed at the rear of the trigger 160 and that may be pushed into the respective pins of the trigger 164 to provide different oil flow rates.

In embodiments, the fuel gun 100 can further include an anti-friction band 166 disposed on the gun body between the gun body and the transition piece, where the anti-friction band 166 can be made of felt, rubber, plastic, etc. to help reduce friction between the transition piece 161 and the gun body 110 when the trigger 160 is actuated, making it easier and smoother for an operator to actuate the trigger.

The technical solution of the present invention is further illustrated below by means of specific examples of each component it will be understood by those skilled in the art that the illustration of these components is not meant to limit the solution of the present invention other components with similar functions can be applied here as well, forming part of the technical solution of the present invention.

Fig. 3A-3D are schematic views of a valve assembly according to embodiments of the present application, fig. 3A and 3B are perspective views of the valve assembly in different directions showing its overall shape, fig. 3C is a side view of the valve assembly showing its side shape, fig. 3D is a schematic cross-sectional view of fig. 3C showing its cross-sectional shape, and fig. 4 is an exploded view of a valve assembly according to embodiments of the present application.

Referring to fig. 1D-1F, 3A-3D, and 4, the valve assembly 120 is generally cylindrical in shape, including an oil circuit valve 310 and an air circuit valve 320; the oil valve 310 is disposed on the liquid passage 104 in the gun body 110, and is used for controlling oil to pass through the gun body 110; the gas path valve 320 is disposed on the gas passage 105 of the gun body 110 for controlling oil vapor recovery.

Valve assembly 120 may have other shapes, such as a conical shape, or a Mongolian shape, etc., or alternatively, may be either conical or Mongolian shaped, for example, for each of the oil and gas circuit valves 310, 320, or both, as will be appreciated by those skilled in the art.

According to embodiments of the present application, the oil valve 310 may be connected to the gas valve 320 as . in , the two may also be formed as a valve assembly 120 that controls both the passage of liquid and the passage of gas.

In the embodiments, the gas passage is deflected in the direction of the valve assembly 120 while the direction of the liquid passage remains substantially unchanged in the embodiments, step is that the gas passage is located inside the liquid passage in the valve assembly 120, and has a lower influence on the flow rate of the oil, so that the liquid passage occupies a larger cross-sectional area more easily, which is beneficial to increasing the flow rate of the oil.

In , the oil valve 310 includes a valve seat 311 and a valve element 312, wherein the valve element 312 is substantially flat and has a end coupled to the driving mechanism 130. when the valve element 312 abuts against the valve seat 311, oil is prevented from passing through the oil gun. when the driving mechanism 130 abuts the valve element 312 away from the valve seat 311, oil is allowed to pass through.

In embodiments, the diameter of the fluid path between the gun body 110 from the oil inlet to the oil path valve is approximately equal to the diameter of the oil inlet thread, for example, in the case where the inlet thread can be M34 x 1.5, the diameter of the fluid path of the oil path valve seat when not passing through the valve core can reach phi 32mm, so that a higher flow rate can be supported.

In , the outside of the valve seat 311 near the valve element 312 includes a recess 314 at a location corresponding to the location of the oil pressure port 106 on the gun body, after oil enters the oil valve, before the valve element is opened, oil may enter the recess 314 from the fluid port in the oil valve 310 through a gap or a pre-defined passage (not shown) between the oil valve 310 and the gun body 110 and may enter the oil pressure port 106 to the vacuum cap chamber in the gun body 110. in embodiments, the gap or passage is designed such that the flow rate of oil entering the vacuum cap chamber or returning from the vacuum cap chamber to the valve assembly chamber is a predetermined flow rate to prevent the vacuum cap chamber oil pressure from changing too quickly.

In , the valve seat 310 further includes a sealing ring 315 and a retaining groove 316, wherein the retaining groove 316 is configured to receive the sealing ring 315. the retaining groove can define the position of the sealing ring 315 to prevent the position of the sealing ring from changing during installation and affecting the sealing effect of the oil gun. the retaining groove 316 is disposed outside the recess 314 (on the side away from the valve element 312) to prevent oil leakage.

In embodiments, the end of the oil valve 310 away from the oil inlet further includes a deflector cone 317. for example, the deflector cone 317 may be shaped like a Mongolian yurt and may have a taper shape from large to small along the direction of oil flow, rather than a taper shape from small to large.this configuration is because the deflector cone 317 may guide oil passing through the poppet 312 to prevent the oil from swirling and losing energy of the oil after passing through the poppet.As will be appreciated by those skilled in the art, the deflector cone 317 may have other shapes.

the gas circuit valve 320 includes a valve seat 321 and a valve stem 322, wherein the valve seat 321 is circular ring shape, it includes an outer ring 323 and an inner ring 324, the outer ring 323 is used for oil passing, the inner ring 324 is used for oil steam passing, the valve stem 322 is partially reduced in diameter and is arranged in the valve seat 321 for controlling oil steam passing, end of the valve stem 322 is extended to connect with the valve core 312, it is beneficial for the driving mechanism 130 to open the oil circuit valve and the gas circuit valve synchronously, the valve stem 322 and the valve core 312 can be fixed connection, such as screw connection, the valve stem 322 and the valve core 312 can also be movable connection, such as direct contact, in embodiments, the outer ring diameter of the valve seat 321 is the same as the diameter of the oil inlet of the gun body or the difference is less than 3mm, in embodiments, the outer ring diameter of the valve seat 321 has a cross-sectional area which is the same as the cross.

In some embodiments , the gas circuit valve 320 further includes a seal seat 327 disposed between the valve stem 322 and the valve seat 321. As shown in the drawings, the seal seat 327 is fixed to the valve seat 321 by a plurality of retaining grooves 328 formed therein. the seal seat 327 is used to separate the liquid passage and the gas passage of the gas circuit valve, thereby preventing the mixing of oil and oil vapor, and further preventing the direct friction between the valve stem 322 and the valve seat 321, thereby increasing the service life of the oil gun and facilitating the maintenance and replacement thereof.in some embodiments , the connection portion between the valve stem 322 and the valve element 312 may also be located in the seal seat 327. further , or more sealing rings are disposed between the seal seat and the valve stem 322, thereby achieving the sealing between the oil passage and the gas circuit passage.

In embodiments, the valve stem 322 is reduced in diameter and is beveled to provide a valve structure with a larger contact surface for the air passage valve 320, against a corresponding counter-bevel in the seat 327. of course, the valve stem 322 may be adapted to contact the seat 327 by including a valve head with a larger diameter, when the valve stem 322 contacts the seat 327, oil vapor is inhibited from passing through the air passage.

, the valve seat 321 includes or more orifices 325 that pass through the outer ring 323 of the valve seat 321 but do not communicate with the outer ring 323, but rather communicate the exterior of the valve seat 321 with the inner ring 324 of the valve seat, which can be used to accommodate the passage of oil vapor.

In embodiments, the valve seat 321 may include a groove 326 near the plurality of holes 325, which may connect the plurality of holes 325 to form pieces of whole bodies, in embodiments, the valve seat 321 further may include a plurality of sealing rings disposed at both sides of the holes 325 or the groove 326, which may seal the oil vapor passage and prevent the oil vapor from leaking, and in embodiments, the valve seat 321 further may include a plurality of retaining grooves for receiving the sealing rings, which may be used to limit the positions of the sealing rings and prevent the positions of the sealing rings from being changed during the assembly process, which may affect the sealing effect of the oil gun.

In the embodiments, the air circuit valve 320 further includes a return spring 329 that fits over the valve stem 322. in the embodiments, the return spring 329 is located in the return spring 313 with the end disposed on the valve stem 322, such as on the portion where the valve spool 312 is attached, and the end disposed on the seal 327. the return spring 329 returns the air circuit valve 320 by pushing on the valve stem 322, i.e., pushing the end of the valve stem into the seal.

in some embodiments, the end of the return spring 313 is set on the valve core, another end is set on the inner ring wall of the valve seat of the air path valve, the inner ring wall and the sealing seat are not moved, when the trigger 160 of the oil gun is pulled to push the driving mechanism 130 to open the oil path valve 310 and the air path valve 320, the return springs 313 and 329 are compressed, when the pushing force of the driving mechanism 130 is removed, the return springs 313 and 329 are restored to their original state to respectively reset the valve core and the valve rod, therefore, the acting force of the return springs 313 and 329 and the pressure of the oil are overcome to open the oil path valve and the air path valve, and the acting force of the return springs 313 and 329 press the oil path valve and the air path valve simultaneously when the oil path valve and the air path valve are closed.

In the ' embodiments, the valve assembly 120 further comprises a positioning ring 330 disposed on the side of the positioning ring away from the oil and gas valves to define the position of the oil and gas valves, the positioning ring 330 can be screwed to push the oil and gas valves 310 and 320 into the valve assembly cavity of the gun body 110 during installation, and the positioning ring can further fix the position of the oil and gas valves 310 and 320 from moving toward the oil inlet of the gun body 110. in the' embodiments, the positioning ring 330 can include threads that engage the threads of the gun body 110 to facilitate installation and positioning of the valve assembly 120.

In the event of fuel loading, the fuel from the fuel dispenser may become contaminated with contaminants due to corrosion of the internal fuel lines of the fuel dispenser, the valve assembly further includes a filter screen 340 disposed between the retaining ring 330 and the fuel valve 320 to filter the fuel from the fuel dispenser and prevent contaminants from entering the components of the fuel gun, for example, the filter screen 340 may be circular in shape and may conform to the cross-section of the valve seat of the fuel valve to effectively filter contaminants from the fuel.

In the embodiments of the present invention, the valve assembly 120 is cylindrical, the cross-sectional area of the oil passage in the valve assembly is not changed or changed greatly, so that the energy loss of the oil is not caused, and the flow rate of the oil gun is increased, and the valve seat of the oil valve is hollow as much as possible, so that steps increase the cross-sectional area of the oil passage, and increase the flow rate of the oil gun, steps may connect the air passage valve and the oil valve into whole bodies, the driving mechanism 130 pushes the valve core 312 of the oil valve 310 to open the air passage valve 320 at the same time, so that the air passage valve and the oil valve can act in , and the recovery of the oil vapor can be performed while the oil passage is opened.

Fig. 5A-5D are schematic views of a drive mechanism according to embodiments of the present application, fig. 5A and 5B are perspective views of the drive mechanism in different directions, respectively, showing its overall shape, fig. 5C is a side view of the drive mechanism, showing its side shape, fig. 5D is a cross-sectional view of the drive mechanism, showing its cross-sectional shape, and fig. 6 is an exploded view of the drive mechanism according to embodiments of the present application.

Referring to fig. 1D-1F, 5A-5D and 6, the driving mechanism 130 includes a fixed sleeve 510, a driving sleeve 520 and a driving shaft 530, wherein the driving shaft 530 is adapted to be fitted in the driving sleeve 520, the end of the driving sleeve 520 in contact with the driving shaft 530 is adapted to be fitted in the fixed sleeve 510, and correspondingly, the other end of the driving shaft 530 is also adapted to be fitted in the fixed sleeve 510 to form a stacked assembly structure, in embodiments, the fixed sleeve 510 is fixed in the driving mechanism cavity of the gun body 110, and the driving sleeve 520 and the driving shaft 530 can respectively reciprocate along the axial direction of the fixed sleeve.

According to embodiments of the present invention, the fixed boss 510 is generally cylindrical and hollow, and the end includes an opening 511 for receiving the drive boss 520 therethrough such that the drive boss extends into the interior of the fixed boss 510. in embodiments, the second end of the fixed boss 510 is tapered to facilitate the assembly of the fixed boss into the drive mechanism cavity of the gun body 110 without affecting the air pressure passage of the gun body 110, making the air pressure passage straight and avoiding the formation of a complicated air pressure passage, which increases the difficulty of casting the gun body 110.

in some embodiments, the fixed hub 510 further includes openings 512 and 513 disposed on opposite sides of the fixed hub 510 and extending from the second end of the fixed hub 510 toward the middle of the fixed hub 510 corresponding to the opening 103 in the gun body 110. As will be appreciated by those skilled in the art, the direction of the drive mechanism is shown in FIG. 5C as a reference direction, the transition piece 161 can be coupled to the drive shaft 530 through the openings 512 and 513. in particular, the transition piece 161 can include a connecting piece 162 and a driving piece 163. the connecting piece 162 can be a U-shaped connecting piece with an open end disposed on the gun body, a U-shaped bottom end connected to the trigger 160, and the driving piece 163 can be a pin, rod, stick, nail, etc. that can be inserted through the opening 103 in the gun body into the openings 512 and 513 in the fixed hub 510 and then through the gun body 110 to connect to the connecting piece 162. when the trigger 160 is actuated, the connecting piece 162 rotates circumferentially relative to the fixed point on the gun body 110, the driving piece 163 moves linearly along the openings 103, 512 and 513 to push the axis of the fixed hub 510.

In embodiments, the fixed sleeve 510 further comprises a recess 514 for defining the position of the fixed sleeve referring to fig. 1D, the relative position of the fixed sleeve and the gun body can be defined or fixed by a retaining element 501, for example, the retaining element 501 can be a retaining pin, a retaining nail, a retaining rod, a retaining element, a screw, etc.

the fixed hub 510 may further include a slot 515 disposed at the bottom of the fixed hub 510 for receiving the stop lever 502 therethrough, referring to FIG. 5D, the fixed hub 510, the driving hub 520 and the driving shaft 530 may be retained by the stop lever 502 to prevent axial rotation therebetween and change the relative position therebetween, the stop lever 502 may also act correspondingly in the slot 515 when the driving shaft 530 or the driving hub 520 moves within the fixed hub, the stop lever 502 or a portion thereof may include threads that may be threadably engaged with the driving shaft, and in embodiments, the stop lever 502 may be fixedly coupled to the driving shaft 530 in other manners, such as snap fit, adhesion, interference fit, transition fit, or the like.

, the fixed bushing 510 may further include an opening 516 disposed above the fixed bushing 510 between the recess 514 and the end of the fixed bushing 510 for receiving a catch pin holder of a vacuum cap.

In embodiments, the fixed sleeve 510 may further include a -th sealing ring 517 and a second sealing ring 518, wherein the -th sealing ring 517 and the second sealing ring 518 are located at a -th end of the fixed sleeve 510, and the -th sealing ring 517 is used for sealing the fixed sleeve 510 and the gun body 110 to prevent oil from entering the driving mechanism cavity of the gun body 110 and leaking out of the gun through the opening 103, and the second sealing ring 518 is used for sealing the fixed sleeve 510 and the driving sleeve 520 to prevent oil from entering the inside of the fixed sleeve and leaking out of the gun through the opening in the fixed sleeve.

According to embodiments of the present invention, the drive hub 520 is generally cylindrical in shape and hollow to receive the drive shaft 530 therethrough and into the interior of the drive hub. according to embodiments of the present invention, the drive hub 520 may include a recess 521 at the end of the drive hub, the recess 521 corresponding to the location of the openings 512 and 513 of the fixed hub 510 to receive the driver 163 of the shifting element 161. in embodiments, the drive hub 520 may not include the recess 521 and the end of the drive hub 520 does not extend beyond the openings 512 or 513 of the fixed hub 510.

In accordance with embodiments of the present application, the second end of the drive sleeve 520 includes a protrusion 522 that contacts the cone 317 (e.g., contacts the protrusion 318 of the cone 317) to push the cone 317 or the poppet 312 to facilitate increasing the distance between the drive mechanism and the cone and facilitating the drive mechanism to push the cone embodiments, the protrusion 522 may further include or more lands 523 thereon to define the position of the drive sleeve, prevent rotation thereof, and facilitate determining the assembly position between the gun parts.

in some embodiments, the drive bushing 520 may further include an opening 524 disposed above the drive bushing 520 near the middle of the drive bushing 520 for receiving the catch pin of the vacuum cap catch pin holder, and accordingly, the corresponding location of the drive shaft also includes an opening 531 that is the same size as the opening 524. when the catch pin of the vacuum cap catch pin holder is dropped into the opening 524 and the opening 531, the drive shaft is integral with the drive bushing (i.e., the gun achieves "catch").

According to embodiments of the present invention, the drive shaft 530 is generally cylindrical, the end adjacent the end in contact with the drive bushing 520 includes a dry test hole 532 positioned to correspond to the notch 521 of the drive bushing 520 for locking the drive shaft 530 and the drive bushing 520 together in blocks from outside the gun body to facilitate dry testing of the grease gun (i.e., simulated grease testing) prior to use thereof. specifically, the drive shaft 530 is inserted from the opening 103 of the gun body 110 through the dry test hole 512, through the notch 521 of the drive bushing 520, through the dry test hole 532, and then out through the opening 513 of the fixed bushing 510 using a positioning member (e.g., a pin, nail, stick, rod, etc.) to move the drive shaft 530 in the axial direction of the fixed bushing 510, the drive shaft 530 simultaneously moving the positioning member to push the notch 521 of the drive bushing 520 to thereby move the drive bushing 520. thus, the dry test assembly can be opened by dropping the retaining pin into the openings 531 and 524 of the drive shaft and drive bushing 530 and drive bushing 520, thereby locking the drive bushing 520 together.

In , the drive mechanism 130 may further include a spring 540 between the drive shaft 530 and the drive sleeve 520 to return the drive shaft and to dampen movement between the drive sleeve and the drive shaft, for example, when the latch pin of the vacuum cap latch portion is not received in the opening 524 and the opening 531, the trigger switch 161 is pulled to move the drive shaft, but the drive sleeve does not move with the drive shaft, the drive shaft only compresses the spring 540. the valve assembly 120 does not open, and the spring 540 returns the drive shaft to its original position upon release of the trigger.

The driving mechanism is a separated driving mechanism, and needs to be locked through a special gear engaging locking mechanism, so that integral structures are formed, the driving mechanism can push the valve assembly only by pulling a trigger, and the separated driving mechanism limits the relative circumferential positions of all parts through the limiting rod, so that the positions of all parts of the driving mechanism are accurate, and the assembly is convenient.

Fig. 7A-7D are schematic views of a vacuum cap according to embodiments of the present application, fig. 7A and 7B are perspective views of the vacuum cap in different directions, respectively, showing its overall shape, fig. 7C is a side view of the vacuum cap showing its side shape, and fig. 7D is a cross-sectional view of the vacuum cap showing its cross-sectional shape, fig. 8 is an exploded view of a embodiment of the present application, the vacuum cap is primarily used to pre- "engage" the drive mechanism (i.e., lock the drive mechanism) when refueling, so that the drive mechanism forms as a whole in a usable state, and to cancel "engagement" the drive mechanism (i.e., the drive mechanism is in an unlocked state) when refueling is complete.

Referring to fig. 1D-1F, 7A-7D, and 8, the vacuum cap 140 includes a cap 710 and a base 720. The cap 710 has a hollow cylindrical shape, and is disposed on the base 720 to form an inner space of the vacuum cap. The base 720 is secured in the vacuum cap cavity and provides a foundation for the rest of the vacuum cap 140.

In embodiments, the portion of the cap 710 outside or outside includes threads 714 that attach the cap 710 to the vacuum cap cavity of the gun body 110. accordingly, threads are present in the gun body vacuum cap cavity that engage it. the cap 710 simultaneously compresses the base 720 beneath it to achieve a secure attachment between the two and the vacuum cap cavity.

In some embodiments, the base 720 includes or more stops 721 spaced around the circumference of the base 720 and adjacent to the cap 710 to define the position of the cap 710 such that is spaced apart from the cap 710. the spaced apart position defines the air pressure channel 107 of the gun body 110. in some cases, the air pressure channel 107 can draw air between the cap 710 and the base 720. in other embodiments, the stops 721 can be located elsewhere on the base 720.

In , the side of the cap 710 may include or more through holes 711 that communicate between the inside and outside of the cap 710 and become part of of the oil pressure passage 106 on the gun body 110 to facilitate oil entering the vacuum cap interior space through the oil pressure passage 106.

In , the cap 710 can further include a plurality of sealing rings 712 disposed between the cap 710 and the gun body 110 and located at upper and lower sides of the through hole 711 to prevent oil from entering the vacuum cap cavity from the oil pressure channel 106 and leaking out of the oil gun, or further flowing into the driving mechanism cavity and leaking out of the oil gun, taking the vacuum cap setting direction as a reference direction in fig. 7C, in , the cap 710 can further include a plurality of limiting grooves 713 for receiving the sealing rings 712 to limit the sealing rings and prevent the sealing rings from moving during installation to affect the sealing effect of the oil gun.

In , the vacuum cap 140 may further include a piston 730 disposed within the cap 710 to move up and down within the cap 710, oil is allowed to pass from the oil pressure passage 106 through a through hole 711 in the cap between the cap 710 and the piston 730, the piston 730 is pushed by the oil to move down when oil pressure is present, the piston 730 moves up with the oil in the cap when oil pressure is removed, the cap 710 and the piston 730 define the oil portion of the vacuum cap, and in embodiments, the piston 730 further may further include or more sealing rings 731 disposed on the circumference of the piston and in contact with the side wall of the cap to seal between the piston and the cap to prevent leakage of oil beneath the piston.

According to embodiments of the present application, the piston 730 includes or a plurality of recesses 733, which are circular ring-shaped, and correspondingly, the portion of the cap contacting the cap includes or a plurality of protrusions 716, which are similar to the recesses 733 and can cooperate with each other to define a path for oil therebetween, and or more recesses 733 and protrusions 716 can increase the contact area with the oil to absorb the change of the oil pressure.

in some embodiments, the vacuum cap may further include a self-sealing spring 701 disposed between the piston 730 and the base 720 for restoring the position of the piston 730. specifically, when the pressure of the oil decreases, the self-sealing spring 701 may push the piston 730 back to the initial position.

in some embodiments, the vacuum cap may further include a membrane 740 shaped and sized similar to the base and disposed between the base and the step of the vacuum cap cavity of the gun body to isolate the air above and below the base according to embodiments of the present application, the membrane 740 is made of a flexible or partially flexible material that changes state when subjected to an applied force, such as rubber, silicone, plastic, etc. the membrane 740 and the piston 730 are located on either side of the base 720 to define a gas portion of the vacuum cap, and the gas channel on the base 720 communicates with the gas portion.

In , the vacuum cap may further include a jump gun spring 703 disposed between the spring seat 702 and the diaphragm 740. according to embodiments of the present application, the diaphragm 740 may include or more spacers 741 disposed on both sides of the diaphragm and operable to clamp the diaphragm 740. wherein the upper spacer contacts the end of the jump gun spring 703 for receiving the force of the spring, thereby facilitating the balance of the force of the diaphragm and preventing the spring from damaging the diaphragm.

In embodiments, the vacuum cap can further include a catch pin holder 750 disposed below the diaphragm to move up and down with the diaphragm, a catch pin 752 disposed in the catch pin holder 750 for linear movement in the catch pin holder, in embodiments the catch pin holder further includes tracks 753 and 754, the catch pin 752 can move along the tracks 753 and 754 to ensure positional accuracy of movement, as previously described, the catch pin holder 750 mates with the opening 516 of the fixed hub 510, when the catch pin holder 750 is received in the opening 516 of the fixed hub, the catch pin can be received in the drive shaft opening 531 and the drive hub opening 524 to integrate the drive shaft with the drive hub in pieces.

In the embodiment, the vacuum cap may further include a connector 704 having a end connected to the catch pin holder 750 and a end connected to the diaphragm, in the embodiment, the end of the connector 704 connected to the diaphragm may also extend through the jump gun spring into the spring seat to connect to the spring seat, which may help to strengthen the connection to the catch pin holder and guide its movement.

The working process of the vacuum cap is roughly as follows: for the oil part, when oil enters the vacuum cap, the piston is pushed downwards by the oil pressure, and then the spring seat is pushed, and the self-sealing spring and the gun-jumping spring are compressed; the gun jumping spring can continuously push the diaphragm to move downwards, so that the gear engaging pin of the gear engaging pin seat can fall into the driving mechanism, and the driving mechanism is locked; when oil leaves the vacuum cap, the self-sealing spring pushes the spring seat upwards without the pressure of the oil, so that the piston is pushed upwards, the diaphragm can be lifted up, the gear-engaging pin seat is driven to move upwards, the gear-engaging pin is separated from the driving mechanism, and the state of the driving mechanism is changed into a non-locking state; for the gas part, when gas between the piston and the diaphragm is extracted, the diaphragm moves upwards, the gun jump spring is compressed, the diaphragm is lifted up, the gear engaging pin seat is driven to move upwards, the gear engaging pin is separated from the driving mechanism, and the state of the driving mechanism is changed into a non-locking state.

Fig. 9A-9D are schematic diagrams of barrel assemblies according to embodiments of the present application, fig. 9A and 9B are perspective views of the barrel assemblies in different directions to show their overall shapes, fig. 9C is a side view of the barrel assemblies to show their side shapes, fig. 9D is a cross-sectional view of the barrel assemblies to show their cross-sectional shapes, and fig. 10 is an exploded view of a embodiment of the present application.

Referring to fig. 1D-1F, 9A-9D and 10, barrel assembly 150 includes venturi valve 910, barrel 920 and air tube 930, wherein venturi valve 910 is disposed at end of barrel 920, and the other end of barrel 920 is insertable into the vehicle's tank, air tube 930 is fitted over barrel 920 for recovering oil vapor, air tube 920 end is in communication with the air passage, and the other end may also extend into the vehicle's tank and be slightly open to accommodate recovery of oil vapor.

In some embodiments , tube 930 is attached to the outside of barrel 920 or venturi valve 910. for example, tube 930 is attached to the body of venturi valve 910 by a threaded connection, and in some embodiments , tube may be attached to barrel 920 or venturi valve 910 by other attachment means, such as welding, snapping, or transition fitting.

In , Venturi valve 910 includes a valve seat 911 and a valve plug 912, wherein the valve seat is connected to the fluid passage of the gun body 110, and is connected to the gun barrel, the valve plug 912 can act on the valve seat 911 to block the passage of oil, in embodiments, the portion of the valve seat 911 not in contact with the valve plug 912 is hollowed out to increase the cross-sectional area of the fluid passage in the Venturi valve, so that the fluid passage of the fluid in the gun is as large as possible, which is beneficial to reducing the energy loss of the oil and increasing the flow rate of the gun.

In , the valve seat 911 is a split valve seat, i.e., the valve seat includes multiple, spliced portions, e.g., for contacting the poppet and for not contacting the poppet, which are threadably connected to form pieces.

According to embodiments of the present application, the contact surface between the valve element 912 and the valve seat 911 is an inclined surface, when oil presses the valve element away from the valve seat, the oil will generate a "venturi" effect through the valve element 912 to form a vacuum, in embodiments, the valve seat 911 includes or more vacuum holes 913, which communicate the contact position between the valve seat 911 and the valve element 912 and the outside of the valve seat, for supplementing air to compensate the vacuum formed by the "venturi" effect of the venturi valve, so as to maintain the balance of air pressure.

, the Venturi valve has two air supply paths, for supplying air from the vacuum cap cavity through the air pressure path 107, vacuum holes 913 corresponding to the position of the air pressure path 107 on the gun body 110, which can be connected to the vacuum cap cavity through the air pressure path 107, for supplying air through the vacuum path 108, the vacuum path 108 extends along the barrel 920, with end communicating with the vacuum holes 913 on the valve seat 911 and end communicating with the outside along the barrel 920, and , the vacuum path 108 is disposed on the barrel 920 and integrally formed with the barrel 920 .

In embodiments, referring to FIG. 1E, the gun 100 may further comprise a position device 170 disposed below the barrel assembly and positioned in the vacuum channel 108 of the gun body 110. the position device 170 may follow different elevations of the gun to clear or block the vacuum channel. for example, the position device 170 comprises a steel ball 171 and a plug 172. the steel ball 171 may reciprocate in a partial vacuum channel (e.g., on both sides of the connection of the gun body vacuum channel to the barrel). the cross-sectional area of the vacuum channel through which the steel ball 171 moves is greater than the cross-sectional area of the rest of the vacuum channel on the gun body, preventing the steel ball from moving to other positions. the plug 172 is disposed at the end of the vacuum channel to seal the vacuum channel. when the steel ball 171 moves near the plug 172, the barrel vacuum channel is above the steel ball 171 and is in communication with the vacuum channel on the gun body, when the ball moves away from the plug, the barrel vacuum channel is below the steel ball 171, the ball 171 blocks the vacuum channel.

in some embodiments, the valve seat 911 and the gun body further comprises a plurality of sealing rings 914 disposed between the valve seat 911 and the gun body 110 and located on both sides of the hollow portion of the valve seat and both sides of the vacuum hole to prevent oil from leaking out of the gun body, or the vacuum hole is supplemented with air from other locations, and the valve seat 911 comprises a plurality of retaining grooves 915 for receiving the sealing rings 914 to retain the sealing rings to prevent the positions of the sealing rings from moving during installation.

, barrel 920 is a bent round tube that may include a vacuum channel 921, the vacuum channel 921 being the same length as the barrel, being located at the bottom of the barrel (with reference to the orientation of the barrel as shown in FIG. 1E), and being in communication with the vacuum channel 108 of the barrel 110. in embodiments , barrel assembly 150 includes a connector 940 that may be used to connect barrel 920 to air tube 930. for example, connector 940 is located at the bottom of the barrel and air tube and extends through the air tube and the barrel vacuum channel. in embodiments , connector 940 includes a through hole 941 that may connect barrel vacuum channel 921 to the vacuum channel 108 of the barrel 110. for example, connector 940 may be a screw that includes a through hole.

According to embodiments of the present application, the barrel and the air tube and the gun body may include a plurality of sealing rings 901 on both sides of the connector 940, and the air tube includes a plurality of limiting grooves 931, which are not described herein.

In some embodiments, tube 930 is connected to venturi valve 910 at its end 930 , and in addition is flared to collect oil vapors from the gun and return the vapors to the fuel dispenser through the gun body's gas passage.A tube, for example, includes an opening 932 disposed below tube 930 and corresponding to the gas passage of gun body 110. in some embodiments, tube 932 is a separate tube, i.e., tube is made from multiple pieces joined together.A portion for collecting tank gases is connected to a portion of the gun body, which may be connected by screws to form a body, which facilitates assembly of the gun barrel assembly and facilitates replacement and maintenance.

the barrel assembly 150 may further include a gas skirt 950 that fits around the outside of the air tube and fits over the oil fill port of the oil tank to prevent oil vapor from escaping into the air and oil from splashing out of the oil tank, the gas skirt 950 may be provided with a plurality of corrugations to help cushion the force of the oil gun extending into the oil tank in accordance with embodiments of the present application, the gas skirt 950 may be made of a flexible or partially flexible material in accordance with embodiments, such as rubber, silicone, plastic, etc.

The foregoing details describe the various components of the oil gun of the present application. As will be appreciated by those skilled in the art, there are only two ways of refueling available, namely, rate-rated refueling and top-up refueling. The operation of the above-mentioned components of the oil gun will be described in two ways.

during a rated fueling event, when a fueling amount is inputted to the fuel dispenser, the fuel dispenser supplies the fuel to the valve assembly of the fuel gun through the hose, since the valve element of the fuel line valve is not opened, the fuel does not flow into the fluid passage of the gun body, but flows from the oil pressure passage of the gun body into the vacuum cap, pushing the piston toward the actuator, thereby engaging the catch pin with the actuator, and at this time, if the trigger is actuated, the actuator sleeve moves toward the valve assembly along with the actuator shaft , thereby opening the valve element of the fuel line valve .

In , the contact area with oil is increased by increasing the protrusion or the recess between the cap body of the vacuum cap and the piston, when the oil hydraulic pressure is reduced, the friction force between the oil is used for preventing the gear engaging pin from being quickly separated from the driving mechanism due to the fact that the oil hydraulic pressure changes too fast, so that the valve core of the oil path valve is pushed and reset by the reset spring to cause the gun to jump (namely, the oil gun stops oil when the oil gun is not added to a preset amount), in the embodiment of step , the oil in the oil path valve enters the oil pressure to pass through the gap between the oil path valve and the gun body, and the gap between the oil path valve and the gun body is small in distance, so that the friction force between the oil path valve and the oil is also increased to prevent the pressure from changing too fast to cause the gun jump.

In another scenario, when the fuel tank is full, the fuel stops filling, when the fuel dispenser supplies fuel through the hose to the valve assembly of the fuel gun, because the spool of the fuel line valve is not open, the fuel does not flow into the fluid passage of the gun body, and therefore the fluid flows from the oil pressure passage of the gun body into the vacuum cap, pushing the piston toward the drive mechanism, and thus the latch pin is latched into the drive mechanism, pulling the trigger, the drive sleeve moves toward the valve assembly with the drive shaft , and thus the spool of the fuel line valve is opened, the fuel flows to the venturi valve along with the fluid passage of the gun body, pushing the spool of the venturi valve, flowing through the venturi valve into the barrel, and flowing into the fuel tank.

In embodiments, the oil gun of the present application is designed to be as simple and straight as possible for the oil flowing channel, the oil enters from the oil inlet of the gun body and flows out from the gun barrel, and the flowing direction is changed to 135-150 degrees, so that the oil has less energy loss in the flowing process, and is not easy to generate vortex, and the flow rate of the oil gun can be effectively improved.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.

Claims (12)

1, A fuel nozzle, comprising:

a gun body including a liquid passage through which oil passes;

a valve assembly disposed in a valve assembly cavity of the gun body configured to allow or prevent oil from passing through the liquid passage;

a drive mechanism disposed in the drive mechanism cavity of the gun body configured to control opening or closing of the valve assembly; and

a barrel assembly at least partially disposed in the barrel assembly cavity of the gun body configured to receive a liquid passage; wherein, the barrel subassembly includes the venturi valve, and it sets up in the barrel subassembly chamber.

2. The fuel nozzle of claim 1, wherein the valve assembly chamber and the actuator chamber are located on the same axis of , and the barrel assembly chamber and the valve assembly chamber are located on different axes of than the actuator chamber.

3. The fuel gun of claim 1, wherein the barrel assembly includes a barrel having an end connected to the venturi valve and an end disposed outside the body.

4. The fuel nozzle of claim 3, wherein the angle between the venturi valve and the drive mechanism is obtuse.

5. The fuel gun of claim 3, further comprising a vacuum channel communicating the venturi valve with an exterior of the fuel gun and configured to replenish gas for the venturi valve, wherein the vacuum channel comprises a th portion extending along the barrel and a second portion located within the gun body.

6. The fuel nozzle of claim 5, wherein the th portion of the vacuum passageway is -piece with the barrel.

7. The fuel gun of claim 5, wherein the gun body further comprises a gas passage configured to recycle the collected oil vapor to the fuel dispenser, and wherein the barrel assembly further comprises a gas tube extending at least partially along the barrel, the gas tube communicating with the gas passage in the gun body.

8. The fuel nozzle of claim 7, further comprising a connector that securely connects the gas tube to the barrel or venturi valve.

9. The fuel nozzle of claim 8, wherein the connector is configured to connect a portion of the vacuum passageway extending along the barrel to a portion of the vacuum passageway in the body while securing the air tube to the barrel, but to keep the vacuum passageway from communicating with the air passageway.

10. The fuel nozzle of claim 4, further comprising a position device disposed in the second portion of the vacuum passageway and configured to control the opening and closing of the vacuum passageway according to different angles of the fuel nozzle.

11. The fuel nozzle as claimed in claim 10, wherein the posture means includes a moving member freely movable along the second portion of the vacuum passage, the vacuum passage is communicated when the inlet and outlet of the second portion of the vacuum passage are located on the side of the moving member , and the vacuum passage is blocked by the moving member when the inlet and outlet of the second portion of the vacuum passage are located on both sides of the moving member.

12. The fuel nozzle of claim 1, further comprising a vacuum cap disposed in the vacuum cap cavity of the nozzle body and configured to lock the drive mechanism in a usable state, wherein the vacuum cap cavity and the venturi valve comprise a pneumatic channel therebetween.

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