CN112477590A

CN112477590A - Novel oil tank cover

Info

Publication number: CN112477590A
Application number: CN202011406022.XA
Authority: CN
Inventors: 曹洪亮; 石美云; 陈文发; 钟磊; 史江坤; 崔磊; 朱韬; 张红斌
Original assignee: Chengdu Est Filter Co ltd
Current assignee: Chengdu Est Filter Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-12

Abstract

The invention relates to the technical field of oil tank caps, in particular to a novel oil tank cap, which is characterized in that: comprises a cover body, a valve core, a control assembly and a valve closing assembly. The cover body is provided with an oil pipe socket and an oil inlet channel which are communicated with each other. The valve core is arranged on the oil inlet channel and used for controlling the on-off of the oil inlet channel. The valve closing assembly comprises a transmission assembly and an impeller arranged on the oil inlet channel. The transmission assembly is connected with the impeller and the valve core, so that the impeller pushes the valve core to close the oil inlet channel. The valve core is provided with a valve opening elastic piece. The elasticity of the valve opening elastic piece is used for pushing the valve core to open the oil inlet channel. When the valve core rotates and closes the oil inlet channel, the valve opening elastic part stores energy. The control assembly controls the valve core to rotate according to the oil level. The valve core automatically controls the on-off of the oil inlet channel according to the oil quantity in the oil tank. During the use, insert oil pipe with filling oil pipe and can the oil pipe socket, cut off full oil, open after oil to this circulation. And the manual watch is not needed. The device is particularly suitable for scenes that fixed equipment needs frequent oiling.

Description

Novel oil tank cover

Technical Field

The invention relates to the technical field of oil tank caps, in particular to a novel oil tank cap.

Background

The fuel tank cap is an important component of an automobile fuel tank. The fuel tank cover not only has the function of closing the fuel tank, but also is convenient to open so as to fill the fuel into the fuel tank. The fuel tank cap of a general automobile only has the function of opening and closing the fuel tank. The oil can be filled by inserting the oil filling pipe of the oil filling gun from the oil tank cover and opening the oil filling gun. After oiling is finished, the oiling gun is taken out from the oil tank cover and the oil tank cover is closed.

The fuel tank cap in the prior art is suitable for common refueling scenes. For some equipment which operates at a fixed position and consumes a large amount of oil, the oil needs to be added manually and continuously, so that the labor amount is increased.

Content of application

The invention aims to provide a novel oil tank cover which can automatically fill and close oil and save manpower.

The embodiment of the invention is realized by the following technical scheme:

a novel fuel tank cap comprises a cap body, a valve core, a control assembly and a valve closing assembly; the cover body is provided with an oil pipe socket and an oil inlet channel which are communicated with each other; the valve core is arranged in the oil inlet channel and used for controlling the on-off of the oil inlet channel;

the valve closing assembly comprises a transmission assembly and an impeller arranged in the oil inlet channel; the transmission assembly is connected with the impeller and the valve core so that the impeller pushes the valve core to close the oil inlet channel;

the valve core is provided with a valve opening elastic piece; the elasticity of the valve opening elastic piece is used for pushing the valve core to open the oil inlet channel; when the valve core rotates and closes the oil inlet channel, the valve opening elastic part stores energy;

the control component controls the valve core to rotate according to the oil level.

Further, the transmission assembly comprises a reduction gear set, an output gear and a transmission rack; the output gear is connected with the impeller through the reduction gear set; the rotating speed of the output gear is lower than that of the impeller; one end of the valve core is provided with a rotating shaft; the rotating shaft of the valve core is provided with driven teeth along the circumferential direction; the transmission rack is meshed with the output gear and the driven gear.

Furthermore, one end of the rotating shaft of the valve core, which is far away from the valve core, is provided with a rotating wheel; a transmission torsion spring is arranged between the reduction gear set and the output gear; the reduction gear set drives the output gear through the transmission torsion spring; the elasticity of the transmission torsion spring is larger than that of the valve opening elastic part; when the transmission torsion spring drives the output gear to rotate, the valve opening elastic piece is compressed; the output gear is a ratchet wheel; the transmission rack is provided with a plurality of ratchet teeth matched with the output gear, so that the output gear can only drive the transmission rack to move towards the direction of compressing the valve opening spring; the transmission rack is provided with a limiting ratchet;

the rotating wheel is provided with limiting teeth; the control component is provided with a limiting claw in cooperation with the limiting tooth; when the limiting claw is separated from the limiting teeth, the valve opening elastic piece drives the valve core to rotate; the control assembly is provided with a limit pawl matched with the limit ratchet; when the limiting pawl is separated from the limiting ratchet, the transmission rack moves towards the direction of compressing the valve opening spring.

Further, the control assembly comprises an oil pressure pipe, a return spring and a release piece; one end of the oil pressure pipe is arranged on the cover body, and the other end of the oil pressure pipe extends to the bottom of the oil tank; two ends of the inside of the oil pressure pipe are provided with pistons; a conducting fluid is sealed between the two pistons, so that the two pistons can be pushed to each other by squeezing the conducting fluid; the limiting claw and the limiting pawl are arranged on the tripping piece; the trip piece is arranged at one end of the oil pressure pipe, so that the piston can push the trip piece to move towards the valve core; the elastic force of the return spring is used for pushing the trip piece to move in the direction away from the valve core;

when the release piece moves towards the valve core, the pawl is gradually matched with the ratchet wheel, and the limiting pawl is gradually separated from the limiting teeth; when the release piece moves away from the valve core, the pawl is gradually released from the ratchet wheel, and the limiting pawl is gradually matched with the limiting teeth.

Further, the pipe diameter of the oil pressure pipe in the oil tank is smaller than that in the cover body.

Further, the device also comprises a locking assembly; the locking assembly comprises a locking gear, a driving rack and a driven rack; the driving rack and the driven rack are respectively positioned on two opposite sides of the locking gear; the locking gear is provided with a reset torsion spring; the elasticity of the locking torsion spring enables one end of the driving rack to extend to the oil pipe socket and enables one end of the driven rack to be meshed with the limiting teeth of the rotating wheel; when the oil filling pipe is inserted into the oil pipe socket, the oil filling pipe extrudes the driving rack, and the driven rack is separated from the limiting teeth.

Furthermore, the cover body is also provided with an exhaust passage; one end of the exhaust passage is communicated with the oil pipe socket, and the other end of the exhaust passage is communicated with the inside of the oil tank; the oil filling pipe comprises an oil outlet pipe and an exhaust pipe; when the oil filling pipe is inserted into the oil pipe socket, the oil outlet pipe is communicated with the oil inlet channel, and the exhaust pipe is communicated with the exhaust channel.

Furthermore, the exhaust passage is also internally provided with active carbon.

Furthermore, an annular groove is formed in the inner wall of the oil inlet channel along the circumferential direction of the oil inlet channel; the impeller comprises an annular rotating ring; the rotating ring is accommodated in the annular groove and can rotate along the annular groove; the rotating ring is provided with a plurality of transmission teeth along the circumferential direction; the transmission teeth are meshed with the transmission assembly.

Furthermore, a plurality of stop assemblies are further arranged on the inner wall of the oil pipe socket along the circumferential direction of the inner wall; the stop assembly comprises a mandril and a jacking spring; the ejector rod extends into the oil pipe socket under the elastic force of the jacking spring; the outer wall of the oil filling pipe is provided with a limiting groove along the circumferential direction in a matching manner with the ejector rod, so that the ejector rod is accommodated in the limiting groove when the oil filling pipe is inserted into the oil pipe socket.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

when the novel oil tank cover is used, the oil filling pipe is inserted into the oil pipe socket. If there is not oil in the oil tank, control assembly control case rotates, and then makes the oil feed passageway open. Oil enters the oil tank through the oil inlet channel. In the process that oil passes through the oil inlet channel, the fast flowing oil impacts the impeller, so that the impeller rotates. After the oil tank is full of oil, the control assembly controls the rotation of the valve core, and the impeller drives the valve core to rotate through the transmission assembly so as to close the oil inlet channel. And in the process that the valve core rotates and closes the oil inlet channel, the valve opening power part stores energy. When the oil in the oil tank is used up, the valve opening power part releases energy, and then the valve core is pushed to rotate to open the oil inlet channel.

Through the mode, the valve core automatically controls the on-off of the oil inlet channel according to the oil quantity in the oil tank. During the use, insert oil pipe with filling oil pipe and can the oil pipe socket, cut off full oil, open after oil to this circulation. And the manual watch is not needed. The device is particularly suitable for scenes that fixed equipment needs frequent oiling.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a fuel tank cap according to the present invention;

FIG. 2 is an enlarged view taken at a point a in FIG. 1;

FIG. 3 is a schematic view of the engagement of the drive rack with the limit pawl;

fig. 4 is a schematic view of an impeller.

Icon: 1-cover body, 11-oil pipe socket, 12-oil inlet channel, 121-annular groove, 13-exhaust channel, 131-active carbon, 14-ejector rod, 15-tightening spring, 16-air suction channel, 17-one-way valve, 2-valve core, 21-valve opening elastic part, 22-oil passing hole, 23-rotating shaft, 231-driven tooth, 24-rotating wheel, 3-oil pressure pipe, 31-piston, 4-impeller, 41-rotating ring, 5-transmission component, 51-speed reduction gear set, 52-output gear, 53-transmission rack, 531-limit ratchet, 54-transmission torsion spring, 6-reset spring, 7-release piece, 71-limit pawl, 72-limit pawl and 721-push spring, 722-push rod, 8-locking component, 81-locking gear, 82-driving rack, 83-driven rack, 9-oil filling pipe, 91-oil outlet pipe, 92-exhaust pipe and 93-limiting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1 to 4, the present invention provides a novel fuel tank cap, which comprises a cap body 1, a valve core 2, a control assembly and a valve closing assembly. The cover body 1 is matched with the oil tank, and the cover body 1 can be arranged on the oil tank. The cover body 1 is provided with an oil pipe socket 11 and an oil inlet passage 12 which are communicated with each other. The oil pipe socket 11 is located on the outer side of the cover body 1, and the oil inlet channel 12 is located on the inner side of the cover body 1, so that the oil inlet channel 12 and the oil pipe socket 11 communicate the inside and the outside of the oil tank. The oil pipe socket 11 is used for inserting the oil filling pipe 9, and the oil filling pipe 9 is internally provided with an oil inlet channel 12 which enters the oil tank. The valve element 2 is disposed in the oil inlet passage 12. The valve core 2 is cylindrical, and oil passing holes 22 communicated with two opposite sides of the valve core 2 are formed in the side wall of the valve core 2 along the radial direction. When the valve core 2 rotates to enable the oil passing hole 22 to be communicated with the oil inlet channel 12, oil in the oil filling pipe 9 can enter the oil tank through the oil inlet channel 12. When the valve core 2 rotates to enable the oil passing hole 22 to be separated from the oil inlet channel 12, the oil inlet channel 12 is closed, and oil in the oil filling pipe 9 can not enter the oil tank through the oil inlet channel 12.

The valve closing assembly comprises a transmission assembly 5 and an impeller 4 arranged in an oil inlet passage 12. When oil flows into the tank through the oil inlet passage 12, the flowing oil drives the impeller 4 to rotate. The transmission assembly 5 connects the impeller 4 and the valve core 2, so that the impeller 4 pushes the valve core 2 to rotate and close the oil inlet channel 12.

The valve body 2 is provided with a valve-opening elastic member 21. The valve-opening elastic member 21 may be an elastic member such as a spring or a torsion spring. In this embodiment, the valve-opening elastic member 21 is a torsion spring. When the valve core 2 rotates and closes the oil inlet channel 12, the valve opening elastic part 21 stores energy, namely, the torsion spring is extruded to generate deformation. The elastic force of the valve-opening elastic member 21 serves to push the valve element 2 to rotate to open the oil inlet passage 12.

The control assembly controls the rotation of the spool 2 according to the oil level. When the quantity in the oil tank is small, the control assembly controls the valve opening elastic piece 21 to release energy, so that the valve core 2 rotates to open the oil inlet channel 12. When the oil in the oil tank is full, the control component controls the valve core 2 to rotate to close the oil inlet channel 12.

When the novel oil tank cover is used, the oil filling pipe 9 is inserted into the oil pipe socket 11. If there is no oil in the oil tank, the control assembly controls the valve core 2 to rotate, so that the oil inlet channel 12 is opened. Oil enters the tank interior through the oil inlet passage 12. During the passage of oil through the oil inlet passage 12, the rapidly flowing oil impacts the impeller 4, causing the impeller 4 to rotate. After the oil tank is full of oil, the control assembly controls the rotation of the valve core 2, and the impeller 4 drives the valve core 2 to rotate through the transmission assembly 5 to close the oil inlet channel 12. And in the process that the valve core 2 rotates and closes the oil inlet channel 12, the valve opening power part stores energy. When the oil in the oil tank is used up, the valve opening power part releases energy, and then the valve core 2 is pushed to rotate to open the oil inlet channel 12.

In this way, the valve core 2 automatically controls the on-off of the oil inlet channel 12 according to the oil quantity in the oil tank. In the using process, the oil filling pipe 9 is inserted into the oil pipe socket 11, the oil is cut off when the oil is full, and the oil is opened when the oil is full, so that the circulation is realized. And the manual watch is not needed. The device is particularly suitable for scenes that fixed equipment needs frequent oiling.

In this embodiment, the transmission assembly 5 includes a reduction gear set 51, an output gear 52, and a transmission rack 53. The output gear 52 is connected to the impeller 4 through a reduction gear set 51. The rotational speed of the output gear 52 is lower than that of the impeller 4. One end of the valve core 2 is provided with a rotating shaft 23. The rotary shaft 23 of the spool 2 is provided with driven teeth 231 along its circumferential direction. The transmission rack 53 is meshed with the output gear 52 and the driven gear 231. The impeller 4 rotates and drives the valve element 2 to rotate through the output gear 52 and the reduction gear set 51.

In fact, the tank capacity is large and the impeller 4 can rotate hundreds of rings during the refueling process. And the valve core 2 can complete the opening and closing of the oil inlet channel 12 only by rotating 90 degrees. After the reduction gear set 51 is arranged, the valve core 2 can rotate 90 degrees after the impeller 4 rotates for a plurality of circles. This enables the impeller 4 to rotate the valve element 2 with only a small output force.

In this embodiment, a transmission torsion spring 54 is disposed between the reduction gear set 51 and the output gear 52. The reduction gear set 51 drives the output gear 52 through a drive torsion spring 54. The driving rack 53 is provided with a limit ratchet 531. The control assembly is provided with a limit pawl 72 in cooperation with the limit ratchet 531. When the reduction gear set 51 rotates, if the limit pawl 72 is engaged with the limit ratchet 531, the transmission rack 53 is limited by the limit pawl 72 and cannot be driven by the output gear 52, that is, the output gear 52 cannot rotate at this time. In this process, the transmission torsion spring 54 is pressed and deformed to store energy. The driving rack 53 is released to drive the valve element 2 to rotate by the driving rack 53 only when the control assembly controls the limit pawl 72 to be disengaged from the limit ratchet 531. This allows the impeller 4 to store energy into the drive torsion spring 54 continuously during the oil feed from the oil feed passage 12 to the oil tank. When the oil level in the oil tank rises to full, the valve core 2 can rotate under the action of the transmission torsion spring 54 to close the oil inlet channel 12.

In practical use, if the valve core 2 rotates synchronously with the impeller 4 and gradually closes the oil inlet passage 12, some flow in the oil inlet passage 12 is gradually reduced, so that the flowing oil is not enough to push the impeller 4 to rotate. This may cause the valve element 2 not to completely close the oil inlet passage 12, which may affect the use effect.

The elastic force of the driving torsion spring 54 is larger than the elastic force of the valve-opening elastic member 21. When the transmission torsion spring 54 drives the output gear 52 to rotate, the valve opening elastic member 21 is compressed. This causes the valve-opening elastic member 21 to store energy during the process that the valve element 2 closes the oil inlet passage 12, and provides power for the valve element 2 to open the oil inlet passage 12.

And one end of the rotating shaft 23 of the valve core 2, which is far away from the valve core 2, is provided with a runner 24. The rotating wheel 24 is provided with a limiting tooth, and the control component is provided with a limiting claw 71 in cooperation with the limiting tooth. When the control assembly controls the limiting claw 71 to be separated from the limiting teeth, namely the oil quantity in the oil tank is reduced to be extremely small, the valve-opening elastic piece 21 drives the valve core 2 to rotate so as to open the oil inlet channel 12.

The control assembly causes the valve core 2 to open the oil inlet channel 12 when the oil quantity in the oil tank is low, and close the oil inlet channel 12 when the oil in the oil tank is full.

The output gear 52 is a ratchet. The driving rack 53 is provided with a plurality of ratchet teeth in cooperation with the output gear 52, so that the output gear 52 can only drive the driving rack 53 to move in a direction of compressing the valve opening spring. When the limit pawl 72 is matched with the limit ratchet 531, the limit pawl 72 limits the transmission rack 53, and further limits the rotation of the output gear 52, so that the transmission torsion spring 54 stores energy. When the limit pawl 72 is disengaged from the limit ratchet 531, the transmission rack 53 is released, and the transmission torsion spring 54 drives the valve element 2 to rotate to close the oil inlet passage 12. Similarly, in the case where the stopping pawl 72 is engaged with the stopping ratchet 531, after the stopping pawl 71 is disengaged from the stopping teeth, the stopping pawl 72 cannot limit the driving rack 53 from moving in the other direction, so that the driving rack 53 can slide relative to the output gear 52, and the driving rack 53 can be reset to wait for being pushed by the output gear 52.

The working logic of the novel oil tank cover is as follows: after the oil filling pipe 9 is inserted into the oil pipe socket 11, if the oil level in the oil tank is low, the piston 31 of the oil pressure pipe 3 extending into the bottom of the oil tank receives less hydraulic pressure from the oil, and the thrust which can be generated by the piston to push the other piston 31 is also less. The trip member 7 is urged away from the spool 2 by the return spring 6. At this time, the stopper claw 71 is disengaged from the stopper teeth, and the valve element 2 is rotated by the valve opening elastic member 21 to open the oil inlet passage 12, thereby filling oil into the oil tank. In this process, the drive rack 53 is moved by the rotation of the spool 2. Since the output gear 52 is a ratchet. The drive rack 53 is provided with a plurality of ratchet teeth in cooperation with the output gear 52. In this process, the driving rack 53 moves without the output gear 52 rotating.

The oil level in the oil tank rises gradually, the hydraulic pressure from the oil received by the piston 31 of the oil pressure pipe 3 extending into the bottom of the oil tank increases gradually, the piston 31 at the other end of the oil pressure pipe 3 pushes the release fastener 7, and the return spring 6 is compressed gradually. In this process, the impeller 4 rotates under the flow of the fluid, thereby causing the drive torsion spring 54 to store energy. When the oil is filled, the limit pawl 72 is pushed by the release part 7 to be separated from the limit ratchet 531, the transmission torsion spring 54 can drive the transmission rack 53 through the output gear 52, and then the valve core 2 rotates to close the oil inlet channel 12, and the oil filling is stopped.

As the oil level again bottoms out as it is used, the spool 2 rotates to open the oil inlet passage 12. Similarly, after the oil is filled, the valve core 2 rotates and the switch closes the oil inlet channel 12, so that the circulation can realize the oiling without the need of the operator on duty.

In this embodiment, the control assembly includes an oil pressure pipe 3, a return spring 6 and a release member 7. The oil pressure pipe 3 is tubular, one end of which is arranged on the cover body 1, and the other end of which extends to the bottom of the oil tank. Pistons 31 are provided at both ends of the inside of the oil pressure pipe 3. The conducting fluid is sealed between the two pistons 31, and when one piston 31 moves into the oil pressure pipe 3, the conducting fluid is compressed, and then the other piston 31 is pushed to move by the conducting fluid. The conductive fluid may be hydraulic oil, air, etc. The limiting claw 71 and the limiting pawl 72 are arranged on the fastening piece 7. The trip 7 is provided at one end of the hydraulic pipe 3 so that the piston 31 can push the trip 7 to move toward the valve body 2. The elastic force of the return spring 6 is used for pushing the trip piece 7 to move towards the direction away from the valve core 2, so that the trip piece 7 is reset.

When the release 7 moves toward the valve body 2, the restricting pawl 71 is gradually fitted to the restricting teeth and the restricting pawl 72 is gradually released from the restricting ratchet 531. When the release 7 moves away from the valve body 2, the restricting pawl 71 gradually disengages from the restricting teeth and the restricting pawl 72 gradually engages the restricting ratchet 531.

The pipe diameter of the oil pressure pipe 3 in the oil tank is smaller than that in the cover body 1. According to the hydraulic principle, the ratio of the thrust of the piston 31 positioned inside the cover body 1 to the thrust of the piston 31 positioned inside the oil tank is equal to the ratio of the pipe diameter of the oil pressure pipe 3 positioned inside the cover body 1 to the pipe diameter thereof positioned inside the oil tank. That is, the pressure of the oil pressure applied to the piston 31 located inside the oil tank is amplified. This enables the piston 31 located in the cover 1 to generate a greater thrust, which is in turn desirable.

In practice, the limit ratchet 531 is disposed at the side of the driving rack 53. The limit pawl 72 is provided with an urging spring 721. The limit pawl 72 is engaged with the limit ratchet 531 by the elastic force of the pushing spring 721. The trip member 7 is provided with a push rod 722 in cooperation with the limit pawl 72. When the release 7 moves toward the valve body 2, the push rod 722 pushes the limit pawl 72 to retreat and disengage from the limit ratchet 531. In this process, pusher spring 721 is compressed.

In this embodiment, a locking assembly 8 is also included. The locking assembly 8 includes a locking gear 81, a driving rack 82 and a driven rack 83. The driving rack 82 and the driven rack 83 are respectively located on opposite sides of the locking gear 81. The driving rack 82 and the driven rack 83 are both arranged along the axial direction of the oil pipe socket 11. When the driving rack 82 is pushed and moved, the driven rack 83 is moved in the opposite direction by the lock gear 81. The lock gear 81 is provided with a return torsion spring. When the driving rack 82 is released, both the driving rack 82 and the driven rack 83 move to the original positions and are reset under the action of the reset torsion spring.

One end of the passive spring is matched with the limiting teeth. The elasticity of the locking torsion spring enables one end of the driving rack 82 to extend to the oil pipe socket 11 and enables one end of the driven rack 83 to be meshed with the limiting teeth, and therefore the driven rack 83 can prevent the rotating wheel 24 from rotating. When the filler tube 9 is inserted into the tube receptacle 11, the filler tube 9 presses the driving rack 82, thereby disengaging the driven rack 83 from the gear teeth. In this case, if the oil level in the oil tank is low, the stopper claw 71 disengages from the stopper tooth, so that the valve body 2 is rotated by the valve-opening elastic member 21 to open the oil inlet passage 12. If the oil filling pipe 9 is not inserted into the oil pipe socket 11, the driven rack 83 is meshed with the limiting teeth under the action of the reset torsion spring. At this time, although the oil level in the oil tank is low, the stopper claw 71 is disengaged from the stopper teeth, and the passive rack 83 restricts the rotation of the runner 24, thereby preventing the valve element 2 from rotating by the valve-opening elastic member 21 to open the oil inlet passage 12. This prevents the oil feed passage 12 from being opened without inserting the filler pipe 9, and prevents impurities from entering the inside of the oil tank.

In this embodiment, the cover 1 is further provided with an exhaust passage 13. One end of the exhaust passage 13 is communicated with the oil pipe socket 11, and the other end is communicated with the inside of the oil tank. The filler pipe 9 includes a drain pipe 91 and an exhaust pipe 92. When the oil filling pipe 9 is inserted into the oil pipe socket 11, the oil outlet pipe 91 is communicated with the oil inlet channel 12 and the exhaust pipe 92 is communicated with the exhaust channel 13.

During refueling, oil flows from the oil storage tank into the oil tank. The air in the oil tank is discharged into the oil storage tank through the exhaust passage 13. Therefore, air filled with oil gas in the oil tank enters the oil storage tank to be stored, and unsafe factors caused by direct discharge of the oil gas to the air during oil filling are avoided.

In this embodiment, the exhaust duct 13 is further provided with activated carbon 131. The oil gas is adsorbed when passing through the active carbon 131, and then the oil gas is well recovered.

In this embodiment, the inner wall of the oil inlet passage 12 is provided with an annular groove 121 along the circumferential direction thereof. The impeller 4 comprises an annular rotating ring 41. The rotating ring 41 is received in the annular groove 121 and can rotate along the annular groove 121. The rotating ring 41 is provided with a plurality of gear teeth along its circumferential direction. The transmission gear is meshed with the transmission component 5. The center of rotation of the impeller 4 is free of the rotating shaft 23, which allows oil to pass through the impeller 4 smoothly. Meanwhile, the arrangement ensures that the reduction gear set 51 only needs to be matched with the periphery of the impeller 4, reduces the transmission mechanism and has simple structure.

In this embodiment, the inner wall of the oil pipe socket 11 is further provided with a plurality of stop assemblies along the circumferential direction. The stop assembly comprises a top rod 14 and a jacking spring 15. The ejector rod 14 extends into the oil pipe socket 11 under the elastic force of the jacking spring 15. The outer wall of the oil filling pipe 9 is provided with a limit groove 93 along the circumferential direction thereof in cooperation with the ejector rod 14, so that when the oil filling pipe 9 is inserted into the oil pipe socket 11, the ejector rod 14 is accommodated in the limit groove 93. The oil filling pipe 9 can be inserted and pulled out only by applying a certain force, and the oil filling gun is prevented from falling off in the practical process.

The lifting handle is also provided with a suction channel 16. Which communicates the outside of the lid 1 with the exhaust duct 13. A check valve is provided in the suction passage 16, which allows only the outside air to enter the exhaust passage 13 but does not allow the air in the exhaust passage 13 to be exhausted to the outside.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel fuel tank cap, characterized by: comprises a cover body (1), a valve core (2), a control assembly and a valve closing assembly; the cover body (1) is provided with an oil pipe socket (11) and an oil inlet channel (12) which are communicated with each other; the valve core (2) is arranged in the oil inlet channel (12) and used for controlling the on-off of the oil inlet channel (12);

the valve closing assembly comprises a transmission assembly (5) and an impeller (4) arranged on the oil inlet channel (12); the transmission assembly (5) is connected with the impeller (4) and the valve core (2) so that the impeller (4) pushes the valve core (2) to close the oil inlet channel (12);

the valve core (2) is provided with a valve opening elastic piece (21); the elastic force of the valve opening elastic piece (21) is used for pushing the valve core (2) to open the oil inlet channel (12); when the valve core (2) rotates and closes the oil inlet channel (12), the valve opening elastic piece (21) stores energy;

the control component controls the valve core (2) to rotate according to the oil level.

2. The new tank cap according to claim 1, characterized in that: the transmission assembly (5) comprises a reduction gear set (51), an output gear (52) and a transmission rack (53); the output gear (52) is connected with the impeller (4) through the reduction gear set (51); the rotational speed of the output gear (52) is lower than the rotational speed of the impeller (4); one end of the valve core (2) is provided with a rotating shaft (23); a rotating shaft (23) of the valve core (2) is provided with a driven tooth (231) along the circumferential direction; the transmission rack (53) is meshed with the output gear (52) and the driven gear (231).

3. The new tank cap according to claim 2, characterized in that: a rotating wheel (24) is arranged at one end of the rotating shaft (23) of the valve core (2) far away from the valve core (2); a transmission torsion spring (54) is arranged between the reduction gear set (51) and the output gear (52); the reduction gear set (51) drives the output gear (52) through the transmission torsion spring (54); the elasticity of the transmission torsion spring (54) is larger than that of the valve opening elastic piece (21); when the transmission torsion spring (54) drives the output gear (52) to rotate, the valve opening elastic piece (21) is compressed; the output gear (52) is a ratchet wheel; the transmission rack (53) is provided with a plurality of ratchet teeth matched with the output gear (52), so that the output gear (52) can only drive the transmission rack (53) to move towards the direction of compressing the valve opening spring; the transmission rack (53) is provided with a limiting ratchet (531);

the rotating wheel (24) is provided with limiting teeth; the control component is provided with a limiting claw (71) in cooperation with the limiting tooth; when the limiting claw (71) is separated from the limiting teeth, the valve opening elastic piece (21) drives the valve core (2) to rotate; the control component is provided with a limit pawl (72) in cooperation with the limit ratchet (531); when the limit pawl (72) is disengaged from the limit ratchet (531), the transmission rack (53) moves in a direction to compress the valve opening spring.

4. The new tank cap according to claim 3, characterized in that: the control assembly comprises an oil pressure pipe (3), a return spring (6) and a release piece (7); one end of the oil pressure pipe (3) is arranged on the cover body (1), and the other end of the oil pressure pipe extends to the bottom of the oil tank; both ends of the inside of the oil pressure pipe (3) are provided with pistons (31); a conducting fluid is sealed between the two pistons (31), so that the two pistons (31) can be mutually pushed by squeezing the conducting fluid; the limiting claw (71) and the limiting pawl (72) are arranged on the fastening releasing piece (7); the trip piece (7) is arranged at one end of the oil pressure pipe (3) so that the piston (31) can push the trip piece (7) to move towards the valve core (2); the elastic force of the return spring (6) is used for pushing the release piece (7) to move towards the direction far away from the valve core (2);

when the release piece (7) moves towards the valve core (2), the limiting pawl (71) is gradually matched with the limiting teeth, and the limiting pawl (72) is gradually separated from the limiting ratchet (531); when the release fastener (7) moves away from the valve core (2), the limiting pawl (71) gradually disengages from the limiting teeth and the limiting pawl (72) gradually fits the limiting ratchet (531).

5. The new tank cap according to claim 4, characterized in that: the oil pressure pipe (3) is located the inside pipe diameter of oil tank is less than its pipe diameter that is located inside lid (1).

6. The new tank cap according to claim 4, characterized in that: also comprises a locking assembly (8); the locking assembly (8) comprises a locking gear (81), a driving rack (82) and a driven rack (83); the driving rack (82) and the driven rack (83) are respectively positioned at two opposite sides of the locking gear (81); the locking gear (81) is provided with a reset torsion spring; the elasticity of the locking torsion spring enables one end of the driving rack (82) to extend to the oil pipe socket (11) and one end of the driven rack (83) to be meshed with the limiting teeth of the rotating wheel (24); when the oil filling pipe (9) is inserted into the oil pipe socket (11), the oil filling pipe (9) extrudes the driving rack (82), and the driven rack (83) is separated from the limiting teeth.

7. The new tank cap according to claim 6, characterized in that: the cover body (1) is also provided with an exhaust passage (13); one end of the exhaust passage (13) is communicated with the oil pipe socket (11), and the other end of the exhaust passage is communicated with the inside of the oil tank; the oil filling pipe (9) comprises an oil outlet pipe (91) and an exhaust pipe (92); when the oil filling pipe (9) is inserted into the oil pipe socket (11), the oil outlet pipe (91) is communicated with the oil inlet channel (12) and the exhaust pipe (92) is communicated with the exhaust passage (13).

8. The new tank cap according to claim 7, characterized in that: and the exhaust passage (13) is also internally provided with activated carbon (131).

9. The new tank cap according to claim 8, characterized in that: an annular groove (121) is formed in the inner wall of the oil inlet channel (12) along the circumferential direction of the oil inlet channel; the impeller (4) comprises an annular rotating ring (41); the rotating ring (41) is accommodated in the annular groove (121) and can rotate along the annular groove (121); the rotating ring (41) is provided with a plurality of transmission teeth along the circumferential direction; the transmission teeth are meshed with the transmission component (5).

10. The new tank cap according to claim 1, characterized in that: the inner wall of the oil pipe socket (11) is also provided with a plurality of stop components along the circumferential direction; the stop assembly comprises a top rod (14) and a jacking spring (15); the ejector rod (14) extends into the oil pipe socket (11) under the elastic force of the jacking spring (15); the outer wall of the oil filling pipe (9) is provided with a limiting groove (93) along the circumferential direction thereof in a matching manner with the ejector rod (14), so that when the oil filling pipe (9) is inserted into the oil pipe socket (11), the ejector rod (14) is accommodated in the limiting groove (93).