CN115126625A

CN115126625A - Adjusting structure and carburetor

Info

Publication number: CN115126625A
Application number: CN202210898986.3A
Authority: CN
Inventors: 郭炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-09-30

Abstract

The invention provides an adjusting structure and a carburetor, and relates to the technical field of carburetors. Be equipped with the holding chamber in the throttle and locate the slide rail in holding chamber, the holding chamber is located to the moving part, and moving part sliding connection is in the slide rail. The holding chamber is located to the rotation piece, rotates a threaded connection in the moving part, and rotation piece can rotate relative to the moving part, and through screw-thread fit and order about the moving part and make a round trip to slide along the slide rail, and then the height position of the oil needle of adjusting and being connected with the moving part. The adjusting structure can be applied to a carburetor, and one end of the moving part, back to the rotating part, of the adjusting structure can be connected with an oil needle. When the height position of the oil needle needs to be adjusted, the rotating part can rotate relative to the moving part, the moving part is driven to slide back and forth along the sliding rail through thread matching, and then the height position of the oil needle is adjusted. The whole throttle valve does not need to be detached from the carburetor, time and labor are saved, and the user experience is good.

Description

Adjusting structure and carburetor

Technical Field

The invention relates to the technical field of carburetors, in particular to an adjusting structure and a carburetor.

Background

A carburetor, which is an important component of a vehicle such as a motorcycle, has a main function of mixing and atomizing fuel oil and air in a certain ratio to sufficiently burn the atomized fuel oil mixture. The carburetor can automatically prepare mixed gas with corresponding concentration according to the requirements of different working states of the engine, and outputs the mixed gas with corresponding amount for the combustion of the engine to do work.

In order to make the motorcycle adapt to different altitudes, air temperature and humidity and keep the normal work of the engine, the height position of an oil needle needs to be adjusted sometimes to adjust the oil output of fuel oil. However, the existing oil needle adjustment needs to remove the whole throttle valve from the carburetor, which is time-consuming and labor-consuming, and has poor user experience.

Disclosure of Invention

Therefore, it is necessary to provide an adjusting structure and a carburetor for solving the problems that the adjustment of the height of the fuel needle of the carburetor requires time and labor for detaching the whole throttle valve.

The present invention provides an adjustment structure comprising:

the throttle valve is internally provided with an accommodating cavity and a slide rail arranged in the accommodating cavity;

the movable piece is arranged in the accommodating cavity and is connected to the sliding rail in a sliding manner;

the rotation piece is located the holding chamber, rotate a piece threaded connection in the moving part, it can be relative to rotate the moving part, order about through the screw-thread fit the moving part along the slide rail makes a round trip to slide, and then adjust with the height position of the oil needle that the moving part is connected.

The adjusting structure can be applied to a carburetor, and one end of the moving part, back to the rotating part, of the adjusting structure can be connected with an oil needle. When the height position of the oil needle needs to be adjusted, the rotating part can rotate relative to the moving part, the moving part is driven to slide back and forth along the sliding rail through thread matching, and then the height position of the oil needle is adjusted. The whole throttle valve does not need to be detached from the carburetor, time and labor are saved, and the user experience is good.

In one embodiment, the cavity wall of the accommodating cavity is provided with a plurality of sliding grooves, and the sliding grooves form the sliding rails; the moving part includes a plurality of joint flanges, each the joint flange with correspond spout cooperation joint, so that the moving part can along the slide rail slides back and forth.

In one embodiment, the adjusting structure further comprises a reset member, the reset member is connected with the throttle valve and the movable member, and when the rotating member rotates relative to the movable member to drive the movable member to approach the reset member, the reset member accumulates reset force; the reset piece can release the reset force and press the movable piece so that the movable piece drives the rotating piece to be positioned on the top of the cavity of the accommodating cavity.

In one embodiment, a plurality of limiting grooves are formed in the circumferential side wall of the rotating part, the adjusting structure further comprises a limiting screw, and the limiting screw can be clamped in any one of the limiting grooves to limit the rotating part to rotate relative to the moving part.

The invention also provides a carburetor, which comprises a shell, an oil needle and the adjusting structure, wherein the shell is provided with a float chamber, an oil outlet channel and an airflow channel, the oil outlet channel is communicated with the float chamber and the airflow channel, one end of the oil needle is connected with the movable piece, the other end of the oil needle is inserted into the oil outlet channel, and the rotary piece can rotate relative to the movable piece so as to drive the oil needle to slide relative to the oil outlet channel and adjust the oil outlet space of the oil outlet channel.

In one embodiment, the carburetor further comprises an adjusting assembly, the adjusting assembly comprises a cover plate and an adjusting piece, the adjusting piece is rotatably connected with the cover plate, the cover plate is connected with the casing, and the adjusting piece can be in clamping fit with the rotating piece, so that when the adjusting piece rotates relative to the cover plate, the adjusting piece can drive the rotating piece to rotate relative to the moving piece, and then the height position of the oil needle is adjusted.

In one embodiment, the adjusting assembly further comprises an elastic member, the elastic member is connected with the cover plate and the adjusting member, the adjusting member can slide relative to the cover plate to be in clamping fit with the rotating member, and meanwhile the adjusting member drives the elastic member to accumulate elastic force; the elastic element can release the elastic force to drive the adjusting element to be separated from the rotating element.

In one embodiment, the throttle valve is slidably connected to the housing, and the throttle valve has a first guide surface arranged at an angle to the axial direction of the intake passage, and the radial dimension of the first guide surface decreases in the intake direction of the intake passage; the throttle valve can slide relative to the shell movably so as to adjust the windward area of the first guide surface on the air inlet channel.

In one embodiment, the carburetor further includes an extension pipe having one end connected to the housing and communicating with the float chamber, and a packing member having the other end connected to the packing member, the packing member being switchable between a closed state and an open state; when the packaging component is in the closed state, the fuel in the float chamber can not flow to the outside; when the packing member is in the open state, the fuel in the float chamber can flow to the outside through the extension pipe and the packing member.

In one embodiment, the carburetor further includes a control member threadably connected to the housing, the control member being rotatable relative to the housing to adjust a flow space between the fuel outlet passage and the float chamber.

Drawings

FIG. 1 is a schematic view of the carburetor of the present invention;

FIG. 2 is a schematic structural view of the oil needle of the present invention;

FIG. 3 is a schematic cross-sectional view of an adjustment structure according to the present invention;

FIG. 4 is a schematic view of an adjustment mechanism according to the present invention;

FIG. 5 is a schematic sectional view of a throttle valve according to the present invention;

FIG. 6 is a schematic view showing the structure of a throttle valve according to the present invention;

FIG. 7 is a schematic view of a rotating member according to the present invention;

FIG. 8 is a schematic view of a perspective view of the adjustment assembly of the present invention;

FIG. 9 is a schematic view of an alternative embodiment of the adjustment assembly of the present invention;

FIG. 10 is a schematic view of a coupling structure of the rotating member and the moving member according to another embodiment of the present invention;

FIG. 11 is a schematic structural view of another embodiment of a throttle valve of the present invention;

FIG. 12 is a schematic structural view of another embodiment of a carburetor of the present invention;

FIG. 13 is a schematic view of the outline structure of the second body according to the present invention;

FIG. 14 is a schematic structural view of another embodiment of a carburetor of the present invention;

fig. 15 is a schematic structural view of the package assembly of the present invention;

FIG. 16 is a cross-sectional view of a second connector of the present invention;

FIG. 17 is a schematic structural view of another embodiment of a carburetor of the present invention;

FIG. 18 is a schematic structural view of another embodiment of a carburetor of the present invention;

fig. 19 is an enlarged schematic view of a portion a in fig. 18;

fig. 20 is a schematic structural view of another embodiment of the control member of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

100. a carburetor;

1. an adjustment structure;

11. a throttle valve; 111. an accommodating cavity; 1111. a first cavity; 1112. a second cavity; 1113. a card slot; 1114. a chute; 1115. a limiting step; 1116. a screw hole; 112. a clamping groove; 113. a first guide surface; 114. a second guide surface; 115. a guide groove;

12. a movable member; 121. a flange; 122. a first threaded hole;

13. a rotating member; 131. a second threaded hole; 132. a hexagonal driving groove; 133. a limiting groove;

14. a connecting member; 141. a fixed seat; 142. a first stud; 143. a second stud; 15. a reset member;

2. a housing; 21. a float chamber; 22. an oil outlet channel; 23. an air flow channel; 24. a first body; 25. a second body; 251. a first arc surface; 252. a second arc surface; 26. installing a channel; 27. an air pressure channel; 28. a balance hole;

3. an oil needle; 31. an external thread; 32. an inclined notch;

4. an adjustment assembly; 41. a cover plate; 411. mounting holes; 42. an adjustment member; 421. a base; 4211. a groove; 422. a rod body; 423. a control cap; 43. an elastic member;

5. an extension pipe;

6. a package assembly; 61. a first connecting member; 611. a handle is rotated; 612. a helical strip; 613. sealing the column; 62. a second connecting member; 621. a first stage; 6211. a connecting screw hole; 622. a second stage; 6221. a stepped bore; 6222. a ring groove; 6223. an annular flange;

7. a control member; 71. a flow restriction portion; 72. inserting grooves; 73. an oblique notch; 74. a seal ring; 75. a return spring.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is apparent that the specific details set forth in the following description are merely exemplary of the invention, which can be practiced in many other embodiments that depart from the specific details disclosed herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, the present invention provides a carburetor 100, the carburetor 100 is used for mixing fuel and air, and delivering the mixture to a combustion chamber of a motor vehicle for combustion to drive an engine to do work, so that the engine drives the motor vehicle to run, and the motor vehicle can be a motorcycle or the like.

The carburetor 100 can finely adjust the amount of oil entering the combustion chamber without the aid of other tools, maintain the normal work of the engine, provide sufficient power for the motorcycle, and enable the motorcycle to adapt to various environments with different altitudes, air temperatures and humidity.

Referring to fig. 1, a carburetor 100 includes an adjustment structure 1, a housing 2, and an oil needle 3, wherein the adjustment structure 1 and the oil needle 3 are both disposed in the housing 2, and the oil needle 3 is connected to the adjustment structure 1.

The shell 2 is internally provided with a float chamber 21, an oil outlet channel 22 and an air flow channel 23, wherein the oil outlet channel 22 is communicated with the float chamber 21 and the air flow channel 23. The float chamber 21 is used for containing fuel, and the carburetor 100 can make the air flow passage 23 form negative pressure when the piston of the engine reciprocates, so that the external air flows into the air flow passage 23 to form air flow. When the air flow passes through the oil outlet channel 22, the oil outlet channel 22 is driven to form negative pressure, and the fuel oil in the float chamber 21 is driven to flow to the air flow channel 23 through the oil outlet channel 22 and is mixed with the air flow in the air flow channel 23 to form a fuel oil mixture. After the fuel mixture enters the combustion chamber for combustion, the engine is driven to do work, and then the motorcycle is driven to run.

The oil needle 3 is movably inserted into the oil outlet channel 22, and the oil needle 3 can slide relative to the oil outlet channel 22 under the driving of the adjusting structure 1, so as to adjust the oil outlet space of the oil outlet channel 22. When the oil outlet space of the oil outlet passage 22 is different, the oil amount of oil outlet from the oil outlet passage 22 in unit time is also different, the mixing proportion of fuel oil and air after being mixed with air flow is also different, and further the power provided for the motorcycle is also different. In order to adapt to different environments and different vehicle conditions, the oil outlet space of the oil outlet channel 22 needs to be adjusted by the oil needle 3, and the oil quantity of oil flowing out from the oil outlet channel 22 in unit time is further adjusted, so that the motorcycle can have sufficient power in different environments and different vehicle conditions.

Referring to fig. 2, fig. 2 shows a schematic structural view of the oil needle 3. The end of the oil needle 3 close to the adjusting structure 1 is defined as a near end, and the end far away from the adjusting structure 1 is defined as a far end. The proximal end of the oil needle 3 is provided with an external thread 31, and the external thread 31 is used for being in threaded connection with the adjusting structure 1. Of course, in other embodiments, the oil needle 3 may also be connected to the adjustment structure 1 in other ways.

The oil needle 3 is provided with an inclined notch 32, and the cross-sectional area of the oil needle 3 increases progressively in the direction from the far end to the near end of the oil needle 3. Wherein the cross section is a plane perpendicular to the central axis of the oil needle 3. In the process of drawing the oil needle 3 out of the oil outlet channel 22, the proximal end of the oil needle 3 is firstly separated from the oil outlet channel 22, and the distal end of the oil needle 3 is separated from the oil outlet channel 22. Therefore, when the adjusting structure 1 drives the oil needle 3 to gradually separate from the oil outlet channel 22, the oil outlet space occupied by the oil needle 3 in the oil outlet channel 22 becomes smaller and smaller, so that the oil outlet space in the oil outlet channel 22 becomes larger and larger. When the adjusting structure 1 drives the oil needle 3 to be gradually inserted into the oil outlet channel 22, the oil outlet space occupied by the oil needle 3 in the oil outlet channel 22 is larger and larger, so the oil outlet space of the oil outlet channel 22 is smaller and smaller. The structure of the oil needle 3 can more finely adjust the oil outlet space of the oil outlet channel 22, thereby more finely adjusting the oil outlet amount.

The oil needle 3 used in the invention has a short length, compared with the oil needle 3 with a long length, the oil needle 3 with a short length is less affected by internal stress in the production and processing process, and the oil needle 3 is not easy to deform, so that the sealing performance of the oil needle 3 is ensured, and the oil needle 3 can completely seal the oil outlet channel 22 when being completely inserted into the oil outlet channel 22, thereby avoiding oil leakage. In addition, the oil needle 3 does not have a pause phenomenon when sliding up and down relative to the oil outlet channel 22.

Referring to fig. 3 and 4, the adjusting structure 1 includes a throttle 11, a movable element 12, a rotating element 13, a connecting element 14 and a reset element 15, wherein the movable element 12, the rotating element 13 and the connecting element 14 are all disposed inside the throttle 11, and two ends of the connecting element 14 are respectively connected to the movable element 12 and the rotating element 13 through threads.

Referring to fig. 5, an accommodating chamber 111 is provided in the throttle valve 11, and the accommodating chamber 111 is used for accommodating the movable element 12 and the rotating element 13. The accommodating cavity 111 comprises a first cavity 1111, a second cavity 1112 and a clamping groove 1113 which are sequentially communicated, and the diameter of the first cavity 1111 is smaller than that of the second cavity 1112. The first cavity 1111 is used for installing the movable part 12, the second cavity 1112 is used for installing the rotating part 13, and the radial size of the rotating part 13 is larger than the diameter of the first cavity 1111, so that the rotating part 13 can always stay in the second cavity 1112.

The locking slot 1113 is used for installing a clamp spring, and the clamp spring can limit the rotating member 13 located in the second cavity 1112 to prevent the rotating member 13 from separating from the second cavity 1112.

Referring to fig. 5 and 6, the cavity wall of the first cavity 1111 is provided with two sliding grooves 1114, and the two sliding grooves 1114 are disposed opposite to each other to form the sliding rail, so that the movable element 12 can slide up and down. Of course, in other embodiments, the number of the chutes 1114 may also be other numbers, such as three or more, and is not limited herein.

The accommodating cavity 111 is further internally provided with a limiting step 1115, the limiting step 1115 is used for limiting the resetting piece 15, and meanwhile, the limiting step 1115 is opened and can be penetrated by the oil needle 3.

The throttle 11 further has a screw hole 1116 therein, and the screw hole 1116 allows a limit screw to pass through so that the limit screw limits the rotating member 13 located in the second cavity 1112. The limit screw can be a wave screw commonly used in the field.

Referring to fig. 1 and 4, the throttle valve 11 has clamping grooves 112 on both sides thereof, and the clamping grooves 112 can be in clamping fit with the housing 2 so that the throttle valve 11 can slide relative to the housing 2, thereby adjusting the shielding area of the throttle valve 11 in the airflow passage 23.

Referring to fig. 3, the connecting member 14 includes a fixing seat 141, a first stud 142 and a second stud 143, which are integrally formed, and the first stud 142 and the second stud 143 are disposed on opposite sides of the fixing seat 141. The first stud 142 is used for screwing the movable member 12, and the second stud 143 is used for screwing the rotatable member 13.

Referring to fig. 3, two sides of the movable member 12 have flanges 121, and the two flanges 121 are respectively engaged with the two sliding grooves 1114, so that the movable member 12 can slide back and forth in the first cavity 1111.

The movable member 12 has a first threaded hole 122 formed therethrough, and the first threaded hole 122 is threadedly connected to the first stud 142. In addition, the end of the first threaded hole 122 facing away from the first stud 142 is screwed to the oil needle 3.

Referring to fig. 3 and 7, the rotating member 13 has a second threaded hole 131 formed therethrough, and the second threaded hole 131 is threadedly coupled to the second stud 143. In addition, a hexagonal driving groove 132 is formed in one side of the rotating member 13, which faces away from the moving member 12, and the hexagonal driving groove 132 can be clamped by a hexagonal wrench, so that the hexagonal wrench drives the rotating member 13 to rotate, which is convenient to operate. Of course, in other embodiments, the hexagonal driving groove 132 may be replaced by other structural grooves, such as a non-circular groove or an irregular groove, for example, a straight groove, a cross groove, a triangular groove, a flat groove, etc., which are not limited herein.

The circumferential side wall of the rotating member 13 is provided with a plurality of limiting grooves 133, and each limiting groove 133 can be in damping clamping connection with a limiting screw, so that the limiting screw limits the rotating member 13 to rotate relative to the moving member 12, and the rotating member 13 is prevented from rotating accidentally. When the rotating member 13 needs to rotate, a large acting force can be applied to the rotating member 13, so as to overcome the resistance of the limit screw to the rotating member 13, and drive the rotating member 13 to rotate relative to the moving member 12.

The rotating part 13 can be made of metal material or high-strength plastic material, so that when the limit screw is switched and clamped with different limit grooves 133 of the rotating part 13, an obvious clicking sound can be sent between the limit screw and the rotating part 13. When the user drives the rotating member 13 to rotate, the user can listen to the emitted sound in real time, and the sound represents that the rotating member 13 rotates by a unit angle, and the unit angle is an included angle formed between two adjacent limiting grooves 133. It should be noted that, the plurality of limiting grooves 133 disposed on the rotating member 13 are distributed at equal angles, so that the user can finely adjust the rotating member 13. The embodiment of fig. 7 has ten spacing grooves 133, and the unit angle is 36 °. During rotation of the rotary member 13, the user hears a sound, which represents that the rotary member 13 is rotated by 36 °. Of course, in other embodiments, the number of the limiting grooves 133 may also be other numbers, such as twelve, which is not limited herein.

The adjusting structure 1 further includes a reset member 15, the reset member 15 of the embodiment shown in fig. 3 is a reset spring, the reset spring is sleeved on the outer wall of the moving member 12, one end of the reset spring abuts against the limit step 1115, and the other end of the reset spring abuts against the moving member 12. When the rotating member 13 rotates relative to the moving member 12 to drive the moving member 12 to slide back to the rotating member 13, the moving member 12 presses the return spring, and the return spring is driven to accumulate the elastic force. The return spring can also release the elastic force to press the movable element 12, so that the movable element 12 and the rotating element 13 are kept in a tightly meshed state.

When the fuel injection concentration of the carburetor needs to be reduced, the rotating piece 13 can be controlled to rotate reversely, the rotating piece 13 drives the moving piece 12 to slide back to the rotating piece 13 through thread matching, the moving piece 12 drives the fuel needle 3 to be gradually inserted into the fuel outlet channel 22, and the fuel outlet area of the fuel outlet channel 22 is reduced.

When the fuel injection concentration of the carburetor needs to be increased, the rotating member 13 can be controlled to rotate in the forward direction, the rotating member 13 drives the moving member 12 to slide towards the rotating member 13 through thread matching, the moving member 12 drives the fuel needle 3 to gradually get away from the fuel outlet passage 22, and the fuel outlet area of the fuel outlet passage 22 is increased.

Referring to fig. 8 and 9, the carburetor 100 further includes an adjustment assembly 4, wherein the adjustment assembly 4 is used for controlling the rotation of the rotation member 13, so that the rotation member 13 drives the movable member 12 to slide back and forth.

The adjusting assembly 4 comprises a cover plate 41, an adjusting piece 42 and an elastic piece 43, wherein the adjusting piece 42 is connected with the cover plate 41 in a sliding and rotating mode, and the adjusting piece 42 can rotate and slide relative to the cover plate 41. The elastic member 43 is sleeved on the adjusting member 42, and two ends of the elastic member 43 abut against the cover plate 41 and the adjusting member 42.

The cover plate 41 has a plurality of mounting holes 411, and the mounting holes 411 can be provided for screws to penetrate through so as to enable the screws to be connected with the shell 2, thereby fixing the adjusting component 4 on the shell 2 and facilitating the rotation of the rotating component 13 controlled by the adjusting component 42.

The adjusting member 42 includes a base 421, a rod 422 and a control cap 423, wherein two ends of the rod 422 are connected to the base 421 and the control cap 423. The cover plate 41 is inserted through one end of the rod 422 close to the base 421, and the end is a regular hexagonal prism and is used for being matched with the hexagonal driving groove of the rotating member 13 in a clamping manner. The user can push the control cap 423 first, and the control cap 423 drives the rod 422 to move towards the rotating member 13, so that the end of the rod 422 is engaged with the hexagonal driving groove of the rotating member 13, and then the control cap 423 is rotated to drive the rotating member 13 to rotate.

When the cap 423 slides toward the rotation member 13, the cap 423 presses against the elastic member 43, and the elastic member 43 is driven to accumulate the elastic force. When the rotation member 13 is not required to be driven to rotate, the elastic member 43 drives the cap 423 and the rod 422 to move away from the rotation member 13, so that the rod 422 is separated from the hexagonal driving groove of the rotation member 13 for safety.

The base 421 has a groove, the elastic member 43 abuts against the bottom of the groove, and the groove can limit the elastic member 43.

When the oil outlet space of the oil outlet channel 22 is adjusted, the control cap 423 only needs to be adjusted manually, the height position of the oil needle is adjusted, the whole throttle valve does not need to be detached from the carburetor, time and labor are saved, and the user experience is good.

Referring to fig. 10, in an alternative embodiment, the connecting member 14 may be replaced by a longer screw rod, which is integrally formed with the rotating member 13. The thickness of the rotating member 13 can be reduced, the thickness of the movable member 12 can be increased, and the screw is in threaded connection with the first threaded hole 122 of the movable member 12. When adjusting part 4 ordered about to rotate piece 13 and rotated, rotated piece 13 drove the screw rod and rotates, and the screw rod passes through screw-thread fit, orders about moving part 12 and slides from top to bottom to also can realize adjusting the height position of oil needle 3. Compared with the above embodiment, the present embodiment has a simpler structure and is convenient to use.

Referring to fig. 11, in a possible embodiment, the throttle 11 is provided with a first guide surface 113 and a second guide surface 114, and the first guide surface 113 and the second guide surface 114 are in engagement transition with each other.

The first guide surface 113 is an arc surface, and the arc of the arc surface is not limited, and may be, for example, 1 to 2 arcs, and the arc of the first guide surface 113 of the embodiment shown in fig. 11 is 1 arc, but may be other arcs, and is not limited herein.

In the air intake direction of the air flow channel 23, the first guide surface 113 is arranged at an angle of 60 ° with the axial direction of the air flow channel 23, but the angle may be other angles, such as 45 ° or 70 °, and is not limited herein. In addition, the radial dimension of the first guide surface 113 decreases such that the guiding action of the gas flow flowing through the first guide surface 113 does not create strong gas turbulence. The radial dimension of the first guide surface 113 is the distance between the first guide surface 113 and the central axis of the air flow passage 23. In addition, the area of the first guide surface 113 decreases in the air intake direction of the air flow channel 23, which is more favorable for alleviating air turbulence.

Referring to fig. 11, the second guiding surface 114 is connected to the end of the first guiding surface 113 with the smallest radial dimension, and the second guiding surface 114 is also an arc surface, and the arc degree of the arc surface is not limited, for example, it may be 1 arc degree to 2 arc degrees, and the arc degree of the second guiding surface 114 of the embodiment shown in fig. 11 is 1.2 arc degrees, of course, it may also be other arc degrees, and it is not limited herein.

In addition, the radial dimension of the second guide surface 114 decreases in the air intake direction of the air flow passage 23.

The airflow entering the airflow channel 23 sequentially flows through the first guide surface 113 and the second guide surface 114, and because the radial dimensions of the first guide surface 113 and the second guide surface 114 are decreased gradually in the air intake direction of the airflow channel 23, the airflow can smoothly pass through the first guide surface 113 and the second guide surface 114, the influence of the throttle valve 11 on the airflow is small, the flow speed of the airflow flowing through the oil outlet channel 22 is high, high negative pressure can be formed on the oil outlet channel 22 to drive more fuel to be sprayed out from the oil outlet channel 22, the mixture mixed with the airflow contains more fuel, and the mixture can provide high power for the engine after flowing into the combustion chamber for combustion.

Referring to fig. 11, guide grooves 115 are formed on both sides of the throttle valve 11, and the guide grooves 115 are used for slidably connecting with the housing 11, so that the throttle valve 11 can slide up and down relative to the housing 2 to adjust the open area of the air flow passage 23. The larger the open area, the larger the airflow volume of the airflow channel 23, and vice versa. In a preferred state, the first guide surface 113 of the throttle valve 11 is located exactly completely in the air flow channel 23, and the vertical side wall of the throttle valve 11 is not located in the air flow channel 23, so that the air flow flowing through the air flow channel 23 does not substantially form air turbulence on the throttle valve 11, the air flow has a greater flow speed through the oil outlet channel 22, the power for sucking the fuel is greater, more fuel can be sucked and mixed with the air flow, and the engine can be provided with more power after combustion.

Referring to fig. 12, the air inlet portion of the housing 2 includes a first body 24 and a second body 25 connected to each other, and the first body 24 and the second body 25 are formed as an integral structure. In the air intake direction of the air flow passage 23, the first body 24 is tapered in radial size and is shaped like a bell mouth.

Referring to fig. 13, fig. 13 shows a schematic outline of the corresponding channel of the second body 25. The inner wall of the second body 25 includes a first arc surface 251 and a second arc surface 252, and the diameter of the second arc surface 252 is smaller than that of the first arc surface 251. In the process of gradually opening the air flow passage 23, the throttle 11 passes through the second arc surface 252 with a smaller diameter and then passes through the first arc surface 251 with a larger diameter. When the engine is in a low-speed state, the throttle valve 11 firstly passes through the second cambered surface 252, the change of the unblocked area of the airflow channel 23 is not large, the negative pressure of the airflow channel 23 cannot be reduced quickly, the pressure difference of the air inlet of the airflow channel 23 is large, so that the airflow velocity entering the airflow channel 23 is large, the atomization effect on fuel oil is good, fuel can be combusted fully, the exhaust gas discharged after the fuel oil is combusted is less, the environment protection is facilitated, and sufficient power can be provided for the engine even in the low-speed state of the engine.

Referring to fig. 14, the carburetor 100 further includes an extension pipe 5 and a packing member 6, one end of the extension pipe 5 is connected to the housing 2, the extension pipe 5 communicates with the float chamber 21, and the other end of the extension pipe 5 is connected to the packing member 6.

The packing member 6 can be switched between a closed state and an open state, and when the packing member 6 is in the closed state, the fuel in the float chamber 21 cannot flow to the outside. When the packing member 6 is in the open state, the fuel in the float chamber 21 can flow to the outside through the extension pipe 5 and the packing member 6. Because the motorcycle is after wading and riding, easily leads to intaking in the carburetion structure 100, can cause the unable abundant burning of fuel in the serious time, just need switch the encapsulation subassembly 6 to the open mode this moment to the fuel with water discharges to the outside, thereby the fuel can fully burn and order about engine normal work.

The packing assembly 6 comprises a first connector 61 and a second connector 62, the first connector 61 is connected with one end of the extension pipe 5 far away from the float chamber 21, and the second connector 62 can move relative to the first connector 61 so as to switch the packing assembly 1 between a closed state and an open state.

There are many ways in which the first connector 61 and the second connector 62 can be movably connected, such as a threaded connection, a snap connection, etc. Referring to fig. 15, the first and

second connectors

61 and 62 are threadedly coupled to hermetically connect or disconnect the first and

second connectors

61 and 62. When the first and

second connectors

61 and 62 are detached and separated, the packing assembly 1 is in an open state, and fuel can be discharged to the outside through the extension pipe 5 and the first connector 61. When the first connector 61 and the second connector 62 are connected in a sealing manner, the packing assembly 6 is in a closed state, and the second connector 62 blocks the first connector 61, preventing fuel from being discharged to the outside through the first connector 61.

The first connecting member 61 includes a stem 611, a screw 612 and a sealing post 613, wherein the screw 612 is located between the stem 611 and the sealing post 613. The user can manually rotate the handle 611 to drive the screw 612 to be screwed to the second connector 62, so that the sealing post 613 seals the second connector 62.

The sealing post 613 is tapered and the diameter of the sealing post 613 decreases in the direction from the stem 611 to the flight 612 so that the sealing post 613 facilitates sealing of the second connector 62.

Referring to fig. 16, the second connecting member 62 includes a first segment 621 and a second segment 622, and the first segment 621 and the second segment 622 are integrally formed. The first section 621 is provided with a coupling screw hole 6211 therein, and the coupling screw hole 6211 is adapted to be threadedly coupled to the first coupling member 61, so as to threadedly couple or decouple the first coupling member 61 and the second coupling member 62.

The second section 622 is used for connecting the extension pipe 5, and the outer diameter of the second section 622 is smaller than that of the first section 621 so as to limit the extension pipe 5. The second section 622 is provided with a stepped hole 6221 therein, and the diameter of the stepped hole 6221 is smaller than that of the coupling screw hole 6211. The stepped hole 6221 allows the sealing post 613 of the first connecting member 61 to be blocked or unblocked, and when the sealing post 613 blocks the stepped hole 6221, fuel cannot flow out of the second connecting member 62. When the first connecting member 61 is separated from the second connecting member 62, and the sealing column 613 does not block the stepped hole 1121, fuel can flow out from the second connecting member 62 to the outside.

The outer wall of the second section 622 is provided with a plurality of spaced ring grooves 6222, so that the second section 622 forms a plurality of ring-shaped flanges 6223, the extension pipe 5 is sleeved on the second section 622 and abuts against the ring-shaped flanges 6223, so that the extension pipe 5 is stably connected with the second section 622 and is not easy to fall off. Of course, in order to make the connection between the extension pipe 5 and the second segment 622 more stable, it is even possible to tie iron wires outside the extension pipe 5.

The package assembly 6 further includes a seal ring 63, and the seal ring 63 is sleeved on the first connecting member 61. When the first connecting piece 61 is in threaded connection with the second connecting piece 62, the first connecting piece 61 and the second connecting piece 62 can abut against the sealing ring 63, so that the sealing performance between the first connecting piece 61 and the second connecting piece 62 is further improved, and fuel oil is prevented from flowing out accidentally.

The extension pipe 5 may be composed of a plurality of bent hard metal pipes, or may be a single soft material hose. The extension pipe 5 of the embodiment shown in fig. 14 is a plastic hose which can be easily deformed to adjust the position of the fuel outlet for discharging the fuel. Even if various complicated parts are shielded near the connection between the extension pipe 5 and the housing 2, the extension pipe 5 can be freely shuttled to adjust the position of the fuel outlet to an appropriate position to discharge the fuel. The length of the extension pipe 5 is not limited, and even if the other structure of the carburetor 100 is complicated, the end of the extension pipe 5 remote from the float chamber 21 can be extended to a position convenient for operation.

Referring to fig. 14, the case 2 is opened with a balance hole 28, and the balance hole 28 communicates the float chamber 21 with the outside of the case 2 to communicate the float chamber 21 with the atmosphere outside the case 2. When the air flow passes through the oil outlet passage 22 in the air flow passage 23, the air flow forms negative pressure to the oil outlet passage 22. Since the float chamber 21 is communicated with the atmosphere, the fuel in the float chamber 21 can smoothly flow through the fuel outlet passage 22 to the air flow passage 23 without affecting the fuel flowing into the fuel outlet passage 22.

Referring to fig. 17, the housing 2 of the embodiment shown in fig. 17 is provided with an air pressure channel 27, the air pressure channel 27 is disposed close to the air flow channel 23, when an air flow passes through the air flow channel 23, a part of the air will be collided into the air pressure channel 27 and enter the float chamber 21, and the air pressure in the float chamber 21 will gradually increase. When the air pressure of the float chamber 21 increases to a certain degree, the air pressure drives the fuel in the float chamber 21 to flow to the air flow passage 23 through the fuel outlet passage 22. Meanwhile, in the flowing process of the airflow channel 23, according to the bernoulli law, negative pressure is generated inside the airflow, and simultaneously the oil outlet channel 22 forms negative pressure, so that the fuel oil in the float chamber 21 can flow to the airflow channel 23 more quickly under the dual actions of the negative pressure and the positive pressure of the oil outlet channel 22. The airflow and more fuel flow into the combustion chamber to be combusted can provide more sufficient power for the engine.

The air pressure passage 27 includes two sections perpendicular to each other so that the air flow can flow into the float chamber 21 more smoothly when entering the air pressure passage 27. In addition, the air pressure channel 27 of the present embodiment is closer to the air flow channel 23, and the air flow flowing into the air pressure channel 27 in a unit time is more, so that a larger air pressure can be formed in the float chamber 21 more quickly, and the fuel oil is driven to enter the oil outlet channel 22 and then enter the air flow channel 23 through the oil outlet channel 22. Of course, in other embodiments, the air pressure channel 27 includes two mutually perpendicular channels, and may be disposed at other included angles, which is not limited herein.

Referring to fig. 18, in order to make the oil discharge amount of the carburetor 100 more finely adjustable, a control member 7 may be provided in the carburetor 100, the control member 7 being screw-coupled to the housing 2, the control member 7 being rotatable relative to the housing 2 to adjust a flow space between the oil discharge passage 22 and the float chamber 21, thereby adjusting the oil discharge amount of the oil discharge passage 22. When the flow space is larger, the amount of fuel flowing from the float chamber 21 into the oil outlet passage 22 per unit time is larger and the amount of fuel flowing into the air flow passage 23 is larger under the same negative pressure. When the flow space is smaller, the amount of fuel flowing from the float chamber 21 into the oil outlet passage 22 per unit time is smaller and the amount of fuel flowing into the air flow passage 23 is smaller under the same negative pressure.

The housing 2 has a mounting passage 26 at a portion adjacent to the oil outlet passage 22, and the control member 7 is screw-coupled to the mounting passage 26. One end of the control member 7 close to the oil outlet passage 22 is provided with a flow restriction portion 71, and the other end of the control member 7 is provided with an insertion groove 72. A user can use a screwdriver to plug in the plug-in slot 72, and the screwdriver drives the control element 7 to rotate, so that the flow restriction portion 71 moves back and forth in the oil outlet channel 22, and the flow restriction portion 71 adjusts the flow space between the oil outlet channel 22 and the float chamber 21.

The restrictor 71 of the embodiment shown in fig. 19 has a tapered shape, and the longitudinal cross-sectional shape of the restrictor 71 is circular, and the longitudinal cross-section is a plane perpendicular to the central axis of the restrictor 71.

Referring to fig. 20, in other embodiments, the flow restrictor 71 may also be a cylinder with a beveled notch 73, without being overly limited herein. When the restrictor 71 moves toward the oil outlet passage 22, the restrictor 71 gradually blocks the oil outlet passage 22, and the oil outlet space of the oil outlet passage 22 becomes smaller. When the flow restriction portion 71 moves away from the oil outlet passage 22, the flow restriction portion 71 gradually opens the oil outlet passage 22, and the oil outlet space of the oil outlet passage 22 becomes larger.

Referring to fig. 19, a sealing ring 74 and a return spring 75 are sleeved on the control member 7, the sealing ring 74 is made of rubber or silica gel, and an outer wall of the sealing ring 74 abuts against an inner wall of the installation channel 26, so that the control member 7 is not easily separated from the installation channel 26. In addition, the seal ring 74 can prevent fuel in the float chamber 21 from leaking out.

The return spring 75 is always in a compressed state, so that the return spring 75 can always exert an elastic force on the control member 7, driving the control member 7 to be always in a tensioned state. The control member 7 is not easy to accidentally rotate to mistakenly adjust the oil outlet space of the oil outlet channel 22 in a natural state, so that the use safety is improved.

In the field of internal combustion engine technology, it is well known that carburetors often provide power outputs beyond electronic fuel injection systems. Because the electronic fuel injection system has a large number of complex sensors, the sensors can transmit collected signals to the central controller ECU, the ECU controls the fuel injection system to inject fuel to the engine to do work after calculation, and the whole process needs a certain time. The carburetor completely follows the physical law, the accurate fuel can be provided for the engine at the moment of opening the throttle valve, and the engine can respond to the accurate fuel at the first time and completely release power due to the fine fuel atomization effect. Compared with the traditional closed carburetor, all adjustable mechanisms of the carburetor are exposed outside, can be adjusted without any tool, and are very convenient, and meanwhile, the carburetor is a mechanical fuel system, and is more stable and reliable in operation under a severe environment compared with an electronic fuel injection system.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes, substitutions and alterations can be made by those skilled in the art without departing from the spirit of the invention, and these are all intended to be covered by the scope of the invention. Therefore, the protection scope of the present invention should be subject to the claims.

Claims

1. An adjustment structure, comprising:

2. The adjusting structure according to claim 1, wherein a plurality of sliding grooves are formed on a cavity wall of the accommodating cavity, and the sliding grooves form the sliding rail; the moving part includes a plurality of joint flanges, each the joint flange with correspond spout cooperation joint, so that the moving part can along the slide rail slides back and forth.

3. The adjusting structure according to claim 1, further comprising a reset member, wherein the reset member is connected to the throttle valve and the movable member, and accumulates a reset force when the movable member is driven to approach the reset member by the rotation of the rotating member relative to the movable member; the reset piece can release the reset force and press the movable piece so that the movable piece drives the rotating piece to be positioned on the top of the cavity of the accommodating cavity.

4. The adjusting structure of claim 3, wherein a plurality of limiting grooves are formed in a circumferential side wall of the rotating member, the adjusting structure further comprises a limiting screw, and the limiting screw can be clamped in any one of the limiting grooves to limit the rotating member to rotate relative to the moving member.

5. A carburetor, comprising a housing, an oil needle and the adjusting structure according to any one of claims 1-4, wherein the housing has a float chamber, an oil outlet passage and an air flow passage, the oil outlet passage communicates with the float chamber and the air flow passage, one end of the oil needle is connected to the movable member, the other end of the oil needle is inserted into the oil outlet passage, and the rotatable member is capable of rotating relative to the movable member to drive the oil needle to slide relative to the oil outlet passage to adjust the oil outlet space of the oil outlet passage.

6. The carburetor of claim 5, further comprising an adjustment assembly including a cover plate and an adjustment member, wherein the adjustment member is rotatably connected to the cover plate, the cover plate is connected to the housing, and the adjustment member is capable of engaging with the rotating member such that when the adjustment member rotates relative to the cover plate, the adjustment member is capable of driving the rotating member to rotate relative to the moving member, thereby adjusting the high-low position of the oil needle.

7. The carburetor of claim 6, wherein the adjustment assembly further includes a resilient member connecting the cover plate and the adjustment member, the adjustment member being slidable relative to the cover plate into snap-fit engagement with the rotational member, and the adjustment member urging the resilient member to accumulate a resilient force; the elastic element can release the elastic force to drive the adjusting element to be separated from the rotating element.

8. A carburettor according to claim 5 wherein the throttle valve is slidably connected to the housing and has a first guide surface angled with respect to the axial direction of the inlet passage, the radial dimension of the first guide surface decreasing in the direction of inlet of the inlet passage; the throttle valve can slide relative to the shell movably so as to adjust the windward area of the first guide surface on the air inlet channel.

9. The carburetor of claim 5, further comprising an extension tube connected at one end to the housing and communicating with the float chamber, and a packing assembly connected at the other end to the extension tube, the packing assembly being switchable between a closed state and an open state; when the packaging component is in the closed state, the fuel oil in the float chamber cannot flow to the outside; when the packing member is in the open state, the fuel in the float chamber can flow to the outside through the extension pipe and the packing member.

10. A carburetor according to claim 5, further comprising a control member threadably connected to the housing, the control member being rotatable relative to the housing to adjust a flow space between the fuel outlet passage and the float chamber.