Adjusting structure and carburetor

Abstract

The application provides a regulating structure and a carburetor, and relates to the technical field of carburetors. The regulating structure comprises a throttle valve, a movable piece and a rotating piece. The throttle valve is internally provided with a containing cavity and a sliding rail arranged in the containing cavity. The movable piece is arranged in the containing cavity and is slidingly connected to the sliding rail. The rotating piece is arranged in the containing cavity and is threadedly connected to the movable piece. The rotating piece can rotate relative to the movable piece. The movable piece is driven to slide back and forth along the sliding rail through thread cooperation, so as to adjust the height position of an oil needle connected to the movable piece. The regulating structure can be applied to the carburetor. One end of the movable piece away from the rotating piece can be connected to the oil needle. When the height position of the oil needle needs to be adjusted, the rotating piece can be rotated relative to the movable piece. The movable piece is driven to slide back and forth along the sliding rail through thread cooperation, so as to adjust the height position of the oil needle. The whole throttle valve does not need to be disassembled from the carburetor, time and labor are saved, and the user experience is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carburetors, and particularly relates to a regulating structure and a carburetor. BACKGROUND

[0002] As an important component of motorcycles and other vehicles, the carburetor mainly functions to mix fuel and air in a certain proportion and atomize the mixed fuel so that the atomized mixed fuel can be fully combusted. The carburetor can automatically mix air and fuel in a certain proportion according to the requirements of different working states of the engine, and output a corresponding amount of mixed gas for the engine to combust and do work.

[0003] In order to adapt the motorcycle to different altitudes, air temperatures and humidities and keep the engine normally working, sometimes the height position of the oil needle needs to be adjusted to adjust the fuel output. However, the existing oil needle adjustment needs to disassemble the entire throttle valve from the carburetor, which is time-consuming and laborious and has poor user experience. SUMMARY

[0004] Therefore, it is necessary to provide a regulating structure and a carburetor to solve the problem that the height position of the oil needle needs to be adjusted by disassembling the entire throttle valve from the carburetor.

[0005] The present application provides a regulating structure, comprising:

[0006] a throttle valve, which is internally provided with a containing cavity and a sliding rail arranged in the containing cavity;

[0007] a movable part, which is arranged in the containing cavity and is slidingly connected to the sliding rail;

[0008] a rotating part, which is arranged in the containing cavity and is threadedly connected to the movable part, and the rotating part can rotate relative to the movable part, and the rotating part drives the movable part to slide back and forth along the sliding rail through thread cooperation, thereby adjusting the height position of the oil needle connected to the movable part.

[0009] The regulating structure can be applied to the carburetor, and one end of the movable part of the regulating structure away from the rotating part can be connected to the oil needle. When the height position of the oil needle needs to be adjusted, the rotating part can be rotated relative to the movable part, the movable part is driven to slide back and forth along the sliding rail through thread cooperation, and the height position of the oil needle is adjusted. The entire throttle valve does not need to be disassembled from the carburetor, which saves time and labor and has good user experience.

[0010] In one of the embodiments, the cavity wall of the containing cavity is provided with a plurality of sliding grooves, and the plurality of sliding grooves form the sliding rail; the movable part comprises a plurality of clamping flanges, each clamping flange is clamped in cooperation with the corresponding sliding groove, so that the movable part can slide back and forth along the sliding rail.

[0011] In one of the embodiments, the adjusting structure further comprises a reset member, the reset member is connected with the throttle valve and the movable member, 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 member can release the reset force to press the movable member, so that the movable member drives the rotating member to be positioned at the top of the accommodating cavity.

[0012] In one of the embodiments, the circumferential side wall of the rotating member is provided with a plurality of limiting grooves, and the adjusting structure further comprises a limiting screw, the limiting screw can be clamped in any one of the limiting grooves to limit the rotation of the rotating member relative to the movable member.

[0013] The application further provides a carburetor, which comprises a shell, a fuel needle and the adjusting structure as described above, the shell has 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 fuel needle is connected with the movable member, the other end of the fuel needle is inserted into the oil outlet channel, and the rotating member can rotate relative to the movable member to drive the fuel needle to slide relative to the oil outlet channel and adjust the oil outlet space of the oil outlet channel.

[0014] In one of the embodiments, the carburetor further comprises an adjusting assembly, the adjusting assembly comprises a cover plate and an adjusting member, the adjusting member is rotationally connected with the cover plate, the cover plate is connected with the shell, and the adjusting member can be clamped and matched with the rotating member, so that when the adjusting member rotates relative to the cover plate, the adjusting member can drive the rotating member to rotate relative to the movable member, and then the height position of the fuel needle is adjusted.

[0015] In one of the embodiments, 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 clamped and matched with the rotating member, and at the same time, the adjusting member drives the elastic member to accumulate elastic force; the elastic member can release the elastic force to drive the adjusting member to be separated from the rotating member.

[0016] In one of the embodiments, the throttle valve is slidingly connected with the shell, the throttle valve has a first guide surface, the first guide surface is arranged at an angle with the axial direction of the air inlet channel, and in the air inlet direction of the air inlet channel, the radial dimension of the first guide surface decreases; the throttle valve can slide relative to the shell to adjust the windward area of the first guide surface in the air inlet channel.

[0017] In one of the embodiments, the carburetor further comprises an extension pipe and a sealing assembly, one end of the extension pipe is connected to the housing and the extension pipe is communicated with the float chamber, the other end of the extension pipe is connected to the sealing assembly, the sealing assembly is capable of switching between a closed state and an open state; when the sealing assembly is in the closed state, fuel in the float chamber cannot flow to the outside; when the sealing assembly is in the open state, fuel in the float chamber can flow to the outside through the extension pipe and the sealing assembly.

[0018] In one of the embodiments, the carburetor further comprises a control member, the control member is threadedly connected to the housing, the control member is capable of rotating relative to the housing to adjust the flow space between the oil outlet channel and the float chamber. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the carburetor of the present application;

[0020] Figure 2 It is a structural schematic diagram of the oil needle of the present application;

[0021] Figure 3 It is a sectional structural schematic diagram of the adjusting structure of the present application;

[0022] Figure 4 It is a structural schematic diagram of the adjusting structure of the present application;

[0023] Figure 5 It is a sectional structural schematic diagram of the throttle valve of the present application;

[0024] Figure 6 It is a structural schematic diagram of the throttle valve of the present application;

[0025] Figure 7 It is a structural schematic diagram of the rotating member of the present application;

[0026] Figure 8 It is a structural schematic diagram of the adjusting assembly of the present application from one perspective;

[0027] Figure 9 It is a structural schematic diagram of the adjusting assembly of the present application from another perspective;

[0028] Figure 10 It is a connecting structural schematic diagram of another embodiment of the rotating member and the movable member of the present application;

[0029] Figure 11 It is a structural schematic diagram of another embodiment of the throttle valve of the present application;

[0030] Figure 12 It is a structural schematic diagram of another embodiment of the carburetor of the present application;

[0031] Figure 13 A profile structure diagram of a second body of the present application;

[0032] Figure 14 A structure diagram of another embodiment of the carburetor of the present application;

[0033] Figure 15 A structure diagram of the packaging assembly of the present application;

[0034] Figure 16 A profile structure diagram of a second connecting piece of the present application;

[0035] Figure 17 A structure diagram of another embodiment of the carburetor of the present application;

[0036] Figure 18 A structure diagram of another embodiment of the carburetor of the present application;

[0037] Figure 19 A Figure 18 enlarged diagram of part A in FIG. 1;

[0038] Figure 20 A structure diagram of another embodiment of the control piece of the present application.

[0039] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0040] 100, carburetor;

[0041] 1, adjusting structure;

[0042] 11, throttle valve; 111, accommodating cavity; 1111, first cavity; 1112, second cavity; 1113, clamping groove; 1114, sliding groove; 1115, limiting step; 1116, screw hole; 112, clamping groove; 113, first guide surface; 114, second guide surface; 115, guide groove;

[0043] 12, movable piece; 121, flange; 122, first threaded hole;

[0044] 13, rotating piece; 131, second threaded hole; 132, hexagonal driving groove; 133, limiting groove;

[0045] 14, connecting piece; 141, fixing seat; 142, first threaded stud; 143, second threaded stud; 15, reset piece;

[0046] 2, housing; 21, float chamber; 22, oil outlet passage; 23, airflow passage; 24, first body; 25, second body; 251, first arc surface; 252, second arc surface; 26, mounting passage; 27, air pressure passage; 28, balance hole;

[0047] 3, oil needle; 31, external thread; 32, bevel cutout;

[0048] 4, adjusting assembly; 41, cover plate; 411, mounting hole; 42, adjusting piece; 421, base; 4211, groove; 422, rod body; 423, control cap; 43, elastic piece;

[0049] 5, extension tube;

[0050] 6, packaging assembly; 61, first connecting piece; 611, handle; 612, screw strip; 613, sealing column; 62, second connecting piece; 621, first section; 6211, connecting screw hole; 622, second section; 6221, stepped hole; 6222, annular groove; 6223, annular flange;

[0051] 7, control piece; 71, flow limiting part; 72, plug-in slot; 73, bevel cutout; 74, sealing ring; 75, return spring. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the specific details described below are only part of the embodiments of the present application, and the present application can also be implemented in many other embodiments different from those described herein. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0053] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0054] Unless otherwise defined, 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0055] Reference Figure 1 The present application provides a carburetor 100 for mixing fuel and air and delivering to a combustion chamber of a motor vehicle for combustion to drive the engine to work, and then the engine drives the motor vehicle to run, which can be a motorcycle or the like.

[0056] The carburetor 100 can finely adjust the oil amount 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 altitudes, temperatures, and humidity environments.

[0057] Reference Figure 1 The carburetor 100 includes an adjusting structure 1, a housing 2, and an oil needle 3, the adjusting structure 1 and the oil needle 3 are both arranged in the housing 2, and the oil needle 3 is connected to the adjusting structure 1.

[0058] The housing 2 is provided with a float chamber 21, an oil outlet channel 22, and an airflow channel 23, and the oil outlet channel 22 communicates the float chamber 21 and the airflow channel 23. The float chamber 21 is used to store fuel, and the carburetor 100 can form negative pressure in the airflow channel 23 when the piston of the engine reciprocates, so that external air flows into the airflow channel 23 to form an air flow. When the air flow flows through the oil outlet channel 22, it drives the oil outlet channel 22 to form negative pressure, thereby driving the fuel in the float chamber 21 to flow through the oil outlet channel 22 to the airflow channel 23, and mixing with the air flow in the airflow channel 23 to form a fuel mixture. After the fuel mixture enters the combustion chamber and burns, it drives the engine to work, thereby driving the motorcycle to run.

[0059] The oil needle 3 is movably inserted in 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 to adjust the oil outlet space of the oil outlet channel 22. When the oil outlet space of the oil outlet channel 22 is different, the oil amount discharged from the oil outlet channel 22 per unit time is also different, and the fuel-air mixing ratio after mixing with the air flow is also different, thereby providing different power for the motorcycle. In order to enable the motorcycle to adapt to different environments and different vehicle conditions, it is necessary to use the oil needle 3 to adjust the oil outlet space of the oil outlet channel 22, thereby adjusting the oil amount discharged from the oil outlet channel 22 per unit time, so that the motorcycle can have sufficient power in different environments and different vehicle conditions.

[0060] Reference Figure 2 , Figure 2 The structure of the oil needle 3 is shown. The end of the oil needle 3 close to the adjusting structure 1 is defined as the proximal end, and the end away from the adjusting structure 1 is defined as the distal end. The proximal end of the oil needle 3 has an external thread 31 for threaded connection with the adjusting structure 1. Of course, in other embodiments, the oil needle 3 can also be connected to the adjusting structure 1 by other means.

[0061] The oil needle 3 has an oblique notch 32, and its cross-sectional area increases from the distal end to the proximal end. The cross-section is a plane perpendicular to the central axis of the oil needle 3. During the withdrawal of the oil needle 3 from the oil outlet channel 22, the proximal end of the oil needle 3 detaches first, followed by the distal end. Therefore, as the adjusting structure 1 gradually moves the oil needle 3 away from the oil outlet channel 22, the oil needle 3 occupies less and less of the oil outlet space in the channel, thus increasing the oil outlet space. Conversely, as the adjusting structure 1 gradually inserts the oil needle 3 into the oil outlet channel 22, the oil needle 3 occupies more and more of the oil outlet space, thus decreasing the oil outlet space. This oil needle 3 structure allows for more precise adjustment of the oil outlet space in the oil outlet channel 22, thereby enabling more precise adjustment of the oil output.

[0062] The oil needle 3 used in this invention is relatively short. Compared to a longer oil needle 3, the shorter oil needle 3 is less affected by internal stress during manufacturing and is less prone to deformation, thus ensuring the sealing performance of the oil needle 3. When the oil needle 3 is fully inserted into the oil outlet channel 22, it can completely seal the oil outlet channel 22, preventing oil leakage. In addition, the oil needle 3 will not get stuck when sliding up and down relative to the oil outlet channel 22.

[0063] refer to Figure 3 and Figure 4 The adjustment structure 1 includes a throttle valve 11, a movable part 12, a rotating part 13, a connecting part 14, and a reset part 15. The movable part 12, the rotating part 13, and the connecting part 14 are all located inside the throttle valve 11, and the two ends of the connecting part 14 are threaded to the movable part 12 and the rotating part 13, respectively.

[0064] refer to Figure 5 The throttle body 11 has a receiving cavity 111 for accommodating the movable component 12 and the rotating component 13. The receiving cavity 111 includes a first cavity 1111, a second cavity 1112, and a slot 1113 connected in sequence. The diameter of the first cavity 1111 is smaller than the diameter of the second cavity 1112. The first cavity 1111 is used to install the movable component 12, and the second cavity 1112 is used to install the rotating component 13. The radial dimension of the rotating component 13 is larger than the diameter of the first cavity 1111, so that the rotating component 13 can remain in the second cavity 1112.

[0065] The slot 1113 is used to install a retaining ring, which can limit the rotation member 13 located in the second cavity 1112 to prevent the rotation member 13 from disengaging from the second cavity 1112.

[0066] refer to Figure 5 and Figure 6The cavity wall of the first cavity 1111 is provided with two sliding grooves 1114, which are oppositely arranged to form the sliding rail for the up-and-down sliding of the movable member 12. Of course, in other embodiments, the number of the sliding grooves 1114 can also be other numbers, for example, three or more, which are not limited herein.

[0067] The accommodating cavity 111 is further provided with a limiting step 1115 for limiting the reset member 15, and the limiting step 1115 is open to allow the oil needle 3 to pass through.

[0068] The throttle valve 11 is further provided with a threaded hole 1116 for the limiting screw to pass through, so that the limiting screw limits the rotating member 13 in the second cavity 1112. The limiting screw can be a common wave screw in the field.

[0069] Referring to Figure 1 and Figure 4 The throttle valve 11 has clamping grooves 112 on both sides, which can be clamped and matched with the shell 2, so that the throttle valve 11 can slide relative to the shell 2, thereby adjusting the blocking area of the throttle valve 11 in the airflow passage 23.

[0070] Referring to Figure 3 The connecting member 14 includes a fixed seat 141, a first threaded column 142 and a second threaded column 143, which are integrally formed. The first threaded column 142 and the second threaded column 143 are arranged on opposite sides of the fixed seat 141. The first threaded column 142 is used for threadedly connecting the movable member 12, and the second threaded column 143 is used for threadedly connecting the rotating member 13.

[0071] Referring to Figure 3 The movable member 12 has flanges 121 on both sides, which are clamped in the two sliding grooves 1114 respectively, so that the movable member 12 can slide back and forth in the first cavity 1111.

[0072] The movable member 12 is provided with a first threaded hole 122, which is threadedly connected with the first threaded column 142. In addition, the end of the first threaded hole 122 away from the first threaded column 142 is threadedly connected with the oil needle 3.

[0073] Referring to Figure 3 and Figure 7The rotating member 13 is provided with a second threaded hole 131 penetrating through the rotating member 13, and the second threaded hole 131 is threadedly connected with the second threaded stud 143. In addition, the side of the rotating member 13 away from the movable member 12 is provided with a hexagonal driving slot 132, and the hexagonal driving slot 132 can be clamped by a hexagonal wrench to drive the rotating member 13 to rotate. Of course, in other embodiments, the hexagonal driving slot 132 can also be replaced by other structure slots, such as a straight slot, a cross slot, a triangular slot, a flat slot, and the like, and the present application is not limited in this regard.

[0074] 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 clamped by a limiting screw to limit the rotating member 13 from rotating relative to the movable member 12, thereby preventing the rotating member 13 from accidentally rotating. When it is necessary to rotate the rotating member 13, a greater force can be applied to the rotating member 13 to overcome the resistance of the limiting screw to the rotating member 13, thereby driving the rotating member 13 to rotate relative to the movable member 12.

[0075] The rotating member 13 can be made of metal material or high-strength plastic material, so that when the limiting screw is switched and clamped in different limiting grooves 133 of the rotating member 13, a clear click sound will be emitted between the limiting screw and the rotating member 13. When driving the rotating member 13 to rotate, the user can listen to the sound in real time, and one click represents that the rotating member 13 rotates by one unit angle, and the unit angle is the included angle between adjacent limiting grooves 133. It should be noted that the plurality of limiting grooves 133 of the rotating member 13 are equally angularly distributed, which facilitates the user to finely adjust the rotating member 13. Figure 7 The number of limiting grooves 133 in the illustrated embodiment is ten, and the unit angle is 36°. During the rotation of the rotating member 13, when the user hears a click, it means that the rotating member 13 has rotated by 36°. Of course, in other embodiments, the number of limiting grooves 133 can also be other numbers, such as twelve, and the present application is not limited in this regard.

[0076] The adjusting structure 1 further comprises a reset member 15, Figure 3 The reset member 15 in the illustrated embodiment is a reset spring, which is sleeved on the outer wall of the movable member 12, and one end of the reset spring abuts against the limiting step 1115, and the other end abuts against the movable member 12. When the rotating member 13 rotates relative to the movable member 12 to drive the movable member 12 to slide away from the rotating member 13, the movable member 12 presses the reset spring to accumulate elastic force. The reset spring can also release the elastic force to press the movable member 12, so that the movable member 12 and the rotating member 13 remain in a tightly engaged state.

[0077] When it is necessary to reduce the fuel injection concentration of the carburetor, the rotating part 13 can be controlled to rotate in the opposite direction. The rotating part 13 drives the movable part 12 to slide away from the rotating part 13 through the threaded engagement. The movable part 12 drives the needle 3 to gradually insert into the oil outlet channel 22, reducing the oil outlet area of ​​the oil outlet channel 22.

[0078] When it is necessary to increase the fuel injection concentration of the carburetor, the rotating part 13 can be controlled to rotate in the forward direction. The rotating part 13 drives the movable part 12 to slide towards the rotating part 13 through the threaded engagement. The movable part 12 drives the needle 3 to gradually move away from the fuel outlet channel 22, thereby increasing the fuel outlet area of ​​the fuel outlet channel 22.

[0079] refer to Figure 8 and Figure 9 The carburetor 100 also includes an adjustment assembly 4, which controls the rotation of the rotating member 13 so that the rotating member 13 drives the movable member 12 to slide back and forth.

[0080] The adjusting assembly 4 includes a cover plate 41, an adjusting member 42, and an elastic member 43. The adjusting member 42 is slidably and rotatably connected to the cover plate 41, and the adjusting member 42 can rotate and slide relative to the cover plate 41. The elastic member 43 is sleeved on the adjusting member 42, and both ends of the elastic member 43 abut against the cover plate 41 and the adjusting member 42.

[0081] The cover plate 41 has multiple mounting holes 411, which allow screws to pass through so that the screws are threaded into the housing 2, thereby fixing the adjusting component 4 onto the housing 2 and facilitating the adjusting component 42 to control the rotation of the rotating component 13.

[0082] The adjusting component 42 includes a base 421, a rod 422, and a control cap 423. Both ends of the rod 422 are connected to the base 421 and the control cap 423. A cover plate 41 passes through the end of the rod 422 closest to the base 421. This end is a regular hexagonal prism, used to engage with the hexagonal drive slot of the rotating component 13. The user can first push the control cap 423, which drives the rod 422 towards the rotating component 13, so that the end of the rod 422 engages with the hexagonal drive slot of the rotating component 13. Then, rotating the control cap 423 will cause the rotating component 13 to rotate.

[0083] When the control cap 423 slides toward the rotating member 13, the control cap 423 presses against the elastic member 43, causing the elastic member 43 to accumulate elastic force. When it is not necessary to drive the rotating member 13 to rotate, the elastic member 43 drives the control cap 423 and the rod 422 to move away from the rotating member 13, so that the rod 422 disengages from the hexagonal drive groove of the rotating member 13 for a safety function.

[0084] The base 421 has a groove, and the elastic element 43 abuts against the bottom of the groove, and the groove can limit the elastic element 43.

[0085] The present application only needs to manually adjust the control cap 423 to adjust the height position of the oil needle when adjusting the oil outlet space of the oil outlet channel 22, without the need to disassemble the entire throttle valve from the carburetor, saving time and effort, and providing a good user experience.

[0086] Reference Figure 10 In an alternative embodiment, the connecting piece 14 described above can be replaced by a longer screw rod, which is integrally formed with the rotating piece 13. The thickness of the rotating piece 13 can be reduced, and the thickness of the movable piece 12 is increased. The screw rod is screwed with the first threaded hole 122 of the movable piece 12. When the adjusting assembly 4 drives the rotating piece 13 to rotate, the rotating piece 13 drives the screw rod to rotate, and the screw rod drives the movable piece 12 to slide up and down through the threaded cooperation, thereby also being able to realize the height position adjustment of the oil needle 3. Compared with the above-mentioned embodiment, the present embodiment has a simpler structure and is convenient to use.

[0087] Reference Figure 11 In a feasible embodiment, the throttle valve 11 is provided with a first guide surface 113 and a second guide surface 114, which are connected to each other in transition.

[0088] The first guide surface 113 is an arc surface, and the radian of the arc surface is not limited, for example, it can be 1 radian-2 radian, Figure 11 The radian of the first guide surface 113 of the illustrated embodiment is 1 radian, and of course, it can also be other radian, which is not limited here.

[0089] In the air inlet direction of the airflow channel 23, the first guide surface 113 is arranged at an included angle with the axial direction of the airflow channel 23, and the included angle is 60°, and of course, the included angle can also be other angles, such as 45° or 70°, etc., which is not limited here. In addition, the radial dimension of the first guide surface 113 decreases, so that the airflow flowing through the first guide surface 113 will not form strong gas turbulence under the guiding action of the first guide surface 113. The radial dimension of the first guide surface 113 is the distance between the first guide surface 113 and the center axis of the airflow channel 23. In addition, in the air inlet direction of the airflow channel 23, the area of the first guide surface 113 decreases, which is more conducive to relieving gas turbulence.

[0090] Reference Figure 11 The second guide surface 114 is connected with the end of the first guide surface 113 with the smallest radial dimension, and the second guide surface 114 is also an arc surface, and the radian of the arc surface is not limited, for example, it can be 1 radian-2 radian, Figure 11 The radian of the second guide surface 114 of the illustrated embodiment is 1.2 radian, and of course, it can also be other radian, which is not limited here.

[0091] In addition, in the air inlet direction of the airflow channel 23, the radial dimension of the second guide surface 114 decreases.

[0092] The air flow entering the air flow passage 23 flows through the first guide surface 113 and the second guide surface 114 in sequence. Since the radial dimensions of the first guide surface 113 and the second guide surface 114 are both decreasing in the air inlet direction of the air flow passage 23, the air flow can smoothly pass through the first guide surface 113 and the second guide surface 114, the influence of the throttle valve 11 on the air flow is small, the flow rate of the air flow passing through the oil outlet passage 22 is large, a large negative pressure can be formed on the oil outlet passage 22 to drive more fuel to be sprayed from the oil outlet passage 22, and the mixture after the fuel is mixed with the air flow contains more fuel, so that the engine can be provided with more power after the mixture is burned in the combustion chamber.

[0093] Referring to Figure 11 The throttle valve 11 is provided with guide grooves 115 on both sides, which are used in sliding connection with the housing 2 to enable the throttle valve 11 to 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 air flow volume of the air flow passage 23, and vice versa. In a preferred state, the first guide surface 113 of the throttle valve 11 is located completely in the air flow passage 23, and the vertical side wall of the throttle valve 11 is not located in the air flow passage 23, so that the air flow flowing through the air flow passage 23 basically does not form air turbulence on the throttle valve 11, the flow rate of the air flow passing through the oil outlet passage 22 is larger, the power for sucking fuel is sufficient, and more fuel can be sucked to be mixed with the air flow, so that the engine can be provided with more power after the fuel is burned.

[0094] Referring to Figure 12 The air inlet part of the housing 2 includes a first body 24 and a second body 25 connected together, and the first body 24 and the second body 25 are integrally formed. In the air inlet direction of the air flow passage 23, the radial dimension of the first body 24 is decreasing, and the shape is similar to a bell mouth.

[0095] Referring to Figure 13 , Figure 13 The profile of the second body 25 corresponding to the passage is shown in the schematic view. 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 valve 11 first 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 first passes through the second arc surface 252, the open area of the air flow passage 23 changes is not very large, the negative pressure of the air flow passage 23 is not quickly reduced, the pressure difference of the air inlet of the air flow passage 23 is large, the flow rate of the air flow entering the air flow passage 23 is large, the atomization effect of the fuel is better, the fuel can be fully burned, the exhaust gas after the fuel is burned is less, which is beneficial to environmental protection, and the engine can be provided with sufficient power even in a low-speed state.

[0096] Reference Figure 14 The carburetor 100 further comprises an extension pipe 5 and a sealing assembly 6, one end of the extension pipe 5 is connected to the housing 2 and the extension pipe 5 communicates with the float chamber 21, the other end of the extension pipe 5 is connected to the sealing assembly 6.

[0097] The sealing assembly 6 is capable of switching between a closed state and an open state, when the sealing assembly 6 is in the closed state, the fuel in the float chamber 21 cannot flow to the outside. When the sealing assembly 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 sealing assembly 6. After the motorcycle is ridden in water, water is easily introduced into the carburetor structure 100, which can cause the fuel to be unable to be fully combusted, at this time, the sealing assembly 6 needs to be switched to the open state to discharge the fuel containing water to the outside, so that the fuel can be fully combusted to drive the engine to work normally.

[0098] The sealing assembly 6 comprises a first connecting piece 61 and a second connecting piece 62, the first connecting piece 61 is connected to the end of the extension pipe 5 away from the float chamber 21, and the second connecting piece 62 is movable relative to the first connecting piece 61 to switch the sealing assembly 1 between the closed state and the open state.

[0099] There are many ways for the first connecting piece 61 and the second connecting piece 62 to be movably connected, such as threaded connection, buckle connection, etc. Figure 15 The first connecting piece 61 and the second connecting piece 62 are threadedly connected to enable the first connecting piece 61 and the second connecting piece 62 to be sealingly connected or disassembled. When the first connecting piece 61 and the second connecting piece 62 are disassembled, the sealing assembly 1 is in the open state, and the fuel can be discharged to the outside through the extension pipe 5 and the first connecting piece 61. When the first connecting piece 61 and the second connecting piece 62 are sealingly connected, the sealing assembly 6 is in the closed state, the second connecting piece 62 blocks the first connecting piece 61, preventing the fuel from being discharged to the outside through the first connecting piece 61.

[0100] The first connecting piece 61 comprises a knob 611, a screw strip 612 and a sealing column 613 in a one-piece structure, and the screw strip 612 is located between the knob 611 and the sealing column 613. The user can manually rotate the knob 611 to drive the screw strip 612 to be threadedly connected to the second connecting piece 62, and then the sealing column 613 seals the second connecting piece 62.

[0101] The sealing column 613 is tapered, and the diameter of the sealing column 613 decreases in the direction from the knob 611 to the screw strip 612, so that the sealing column 613 is convenient for sealing the second connecting piece 62.

[0102] Reference Figure 16The second connecting piece 62 comprises a first section 621 and a second section 622, which are integrally formed. The first section 621 is provided with a connecting screw hole 6211, which is used to be screwed with the first connecting piece 61, so that the first connecting piece 61 and the second connecting piece 62 are screwed or separated.

[0103] The second section 622 is used to connect 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, and the diameter of the stepped hole 6221 is smaller than that of the connecting screw hole 6211. The stepped hole 6221 can be blocked or unblocked by the sealing column 613 of the first connecting piece 61. When the sealing column 613 blocks the sealing stepped hole 6221, the fuel cannot flow out of the second connecting piece 62. When the first connecting piece 61 is separated from the second connecting piece 62, the sealing column 613 does not block the stepped hole 1121, and the fuel can flow out of the second connecting piece 62 to the outside.

[0104] 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 annular flanges 6223. The extension pipe 5 is sleeved on the second section 622 and abuts against the annular flanges 6223, so that the extension pipe 5 and the second section 622 are connected stably and are not easy to fall off. Of course, in order to make the connection between the extension pipe 5 and the second section 622 more stable, even a wire can be tied outside the extension pipe 5.

[0105] The packaging assembly 6 further comprises a sealing ring 63, which is sleeved on the first connecting piece 61. When the first connecting piece 61 is screwed with the second connecting piece 62, the first connecting piece 61 and the second connecting piece 62 can press the sealing ring 63, so as to further improve the sealing between the first connecting piece 61 and the second connecting piece 62, and prevent the fuel from flowing out accidentally.

[0106] The extension pipe 5 can be composed of a plurality of bent hard metal pipes, or can be a soft pipe made of soft material. Figure 14 The extension pipe 5 of the embodiment is a plastic soft pipe, which can be deformed conveniently to adjust the position of the fuel outlet and facilitate the discharge of fuel. Even if there are various complex parts near the connection between the extension pipe 5 and the housing 2, the extension pipe 5 can still shuttle freely and adjust the position of the fuel outlet to a suitable position to discharge the fuel. The length of the extension pipe 5 is not limited, and even if the other structures of the carburetor 100 are more complex, the end of the extension pipe 5 away from the float chamber 21 can also extend out to a position convenient for operation.

[0107] Reference Figure 14The housing 2 has a balance hole 28, which connects the float chamber 21 to the outside of the housing 2, allowing the float chamber 21 to communicate with the atmosphere outside the housing 2. When airflow passes through the oil outlet channel 22 in the airflow channel 23, the airflow creates a negative pressure on the oil outlet channel 22. Since the float chamber 21 is connected to the atmosphere, it does not affect the flow of fuel from the float chamber 21 into the oil outlet channel 22, allowing the fuel to flow smoothly through the oil outlet channel 22 to the airflow channel 23.

[0108] refer to Figure 17 , Figure 17 The housing 2 of the illustrated embodiment has a pressure channel 27, which is located close to the airflow channel 23. When airflow passes through the airflow channel 23, some air will enter the pressure channel 27 and then the float chamber 21, gradually increasing the pressure in the float chamber 21. When the pressure in the float chamber 21 reaches a certain level, the pressure forces the fuel in the float chamber 21 to flow through the fuel outlet channel 22 to the airflow channel 23. Simultaneously, during the flow of air in the airflow channel 23, according to Bernoulli's principle, a negative pressure is generated inside the airflow, which in turn causes a negative pressure to form in the fuel outlet channel 22. Under the combined effect of negative and positive pressure, the fuel in the float chamber 21 can flow to the airflow channel 23 more quickly and in greater quantities. The increased airflow and fuel entering the combustion chamber and burning provides more power to the engine.

[0109] The pressure channel 27 includes two mutually perpendicular channels, allowing airflow to flow more smoothly into the float chamber 21 upon entering the pressure channel 27. Furthermore, in this embodiment, the pressure channel 27 is closer to the airflow channel 23, resulting in a greater airflow rate into the pressure channel 27 per unit time. This allows for a faster formation of higher pressure in the float chamber 21, driving fuel into the fuel outlet channel 22, and then from the fuel outlet channel 22 into the airflow channel 23. Of course, in other embodiments, the pressure channel 27, including the two mutually perpendicular channels, can be arranged at other angles; this is not limited here.

[0110] refer to Figure 18 To enable more precise adjustment of the fuel output of the carburetor 100, a control element 7 can be installed inside the carburetor 100. The control element 7 is threadedly connected to the housing 2 and can rotate relative to the housing 2 to adjust the flow space between the fuel outlet channel 22 and the float chamber 21, thereby adjusting the fuel output of the fuel outlet channel 22. When the flow space is larger, under the same negative pressure, more fuel flows from the float chamber 21 into the fuel outlet channel 22 per unit time, and more fuel flows into the airflow channel 23. When the flow space is smaller, under the same negative pressure, less fuel flows from the float chamber 21 into the fuel outlet channel 22 per unit time, and less fuel flows into the airflow channel 23.

[0111] The housing 2 has a mounting channel 26 adjacent to the oil outlet channel 22, and the control member 7 is screwed with the mounting channel 26. The control member 7 has a flow limiting part 71 at one end close to the oil outlet channel 22, and the other end of the control member 7 is provided with a plug-in slot 72. A user can use a screwdriver to plug into the plug-in slot 72, and rotate the control member 7 by the screwdriver to make the flow limiting part 71 move back and forth in the oil outlet channel 22, so that the flow limiting part 71 adjusts the flow space between the oil outlet channel 22 and the float chamber 21.

[0112] Figure 19 The flow limiting part 71 of the embodiment is conical, and the longitudinal section of the flow limiting part 71 is circular.

[0113] Reference Figure 20 In other embodiments, the flow limiting part 71 can also be a cylinder with a beveled notch 73, which is not limited here. When the flow limiting part 71 moves towards the oil outlet channel 22, the flow limiting part 71 gradually blocks the oil outlet channel 22, and the oil outlet space of the oil outlet channel 22 becomes smaller and smaller. When the flow limiting part 71 moves away from the oil outlet channel 22, the flow limiting part 71 gradually opens the oil outlet channel 22, and the oil outlet space of the oil outlet channel 22 becomes larger and larger.

[0114] Reference Figure 19 The control member 7 is sleeved with a sealing ring 74 and a reset spring 75, the sealing ring 74 is made of rubber or silicone, and the outer wall of the sealing ring 74 abuts against the inner wall of the mounting channel 26, so that the control member 7 is not easy to be separated from the mounting channel 26. In addition, the sealing ring 74 can also prevent the fuel in the float chamber 21 from leaking out.

[0115] The reset spring 75 is always in a compressed state, so that the reset spring 75 can always exert an elastic force on the control member 7 to drive the control member 7 to be always in a taut state. The control member 7 is not easy to be accidentally rotated to misadjust the oil outlet space of the oil outlet channel 22 in a natural state, which improves the safety of use.

[0116] In the field of internal combustion engines, it is well known that the power output of carburetors often exceeds that of electronic injection systems. Because the electronic injection system has a large number of and complex sensors, the sensors will transmit the collected signals to the central controller ECU, and the ECU will control the fuel injection system to inject fuel to the engine to do work after calculation, which needs a certain time. The carburetor completely follows the law of physics and can provide precise fuel to the engine at the moment the throttle is opened. Due to the fine fuel atomization effect, the engine can respond in the first time and completely release power. Compared with the traditional closed carburetor, all adjustable mechanisms of the carburetor of the present application are exposed and can be adjusted without the aid of any tools, which is very convenient. At the same time, it is a mechanical fuel system, which works more stably and reliably than the electronic injection system in a harsh environment.

[0117] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present disclosure.

[0118] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, substitutions and improvements can be made, which should be covered within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the claims.

Claims

1. A conditioning structure, characterized by, The adjusting structure comprises: a throttle valve, which is internally provided with a containing cavity and a sliding rail arranged in the containing cavity; a movable element, which is arranged in the containing cavity and is slidingly connected to the sliding rail; a rotating element, which is arranged in the containing cavity and is threadedly connected to the movable element, the rotating element being capable of rotating relative to the movable element, and driving the movable element to slide back and forth along the sliding rail through thread cooperation, thereby adjusting the height position of an oil needle connected to the movable element; the adjusting structure further comprises a reset element, which is connected to the throttle valve and the movable element, when the rotating element rotates relative to the movable element and drives the movable element to approach the reset element, the reset element accumulates reset force; the reset element can release the reset force to press the movable element, so that the movable element drives the rotating element to be positioned at the top of the containing cavity; a plurality of limiting grooves are arranged on the circumferential side wall of the rotating element, and the adjusting structure further comprises a limiting screw, which can be clamped in any one of the limiting grooves to limit the rotation of the rotating element relative to the movable element.

2. The adjustment structure of claim 1, wherein, A plurality of sliding grooves are arranged on the cavity wall of the containing cavity, and the sliding grooves form the sliding rail; the movable element comprises a plurality of clamping flanges, each clamping flange is clamped in cooperation with a corresponding sliding groove, so that the movable element can slide back and forth along the sliding rail.

3. A carburettor characterised in that, The carburetor further comprises a housing, an oil needle, and the adjusting structure according to any one of claims 1-2, the housing has a float chamber, an oil outlet channel, and an airflow channel, the oil outlet channel communicates the float chamber and the airflow channel, one end of the oil needle is connected to the movable element, the other end of the oil needle is inserted into the oil outlet channel, and the rotating element can rotate relative to the movable element to drive the oil needle to slide relative to the oil outlet channel, thereby adjusting the oil outlet space of the oil outlet channel.

4. The carburetor of claim 3, wherein The carburetor further comprises an adjusting assembly, the adjusting assembly comprises a cover plate and an adjusting element, the adjusting element is rotationally connected to the cover plate, the cover plate is connected to the housing, and the adjusting element can be clamped in cooperation with the rotating element, so that when the adjusting element rotates relative to the cover plate, the adjusting element can drive the rotating element to rotate relative to the movable element, thereby adjusting the height position of the oil needle.

5. The carburetor of claim 4, wherein The adjusting assembly further comprises an elastic element, the elastic element is connected to the cover plate and the adjusting element, the adjusting element can slide relative to the cover plate to be clamped in cooperation with the rotating element, and at the same time, the adjusting element drives the elastic element to accumulate elastic force; the elastic element can release the elastic force to drive the adjusting element to be separated from the rotating element.

6. The carburetor of claim 3, wherein The throttle valve is slidingly connected to the housing, the throttle valve has a first guide surface, the first guide surface is arranged at an angle with the axial direction of the airflow channel, and in the air inlet direction of the airflow channel, the radial dimension of the first guide surface decreases; the throttle valve can slide relative to the housing to adjust the windward area of the first guide surface in the airflow channel.

7. The carburetor of claim 3, wherein The carburetor further comprises an extension pipe and a sealing assembly, one end of the extension pipe is connected to the shell and the extension pipe communicates with the float chamber, the other end of the extension pipe is connected to the sealing assembly, the sealing assembly is switchable between a closed state and an open state; when the sealing assembly is in the closed state, fuel in the float chamber cannot flow to the outside; when the sealing assembly is in the open state, fuel in the float chamber can flow to the outside through the extension pipe and the sealing assembly.

8. The carburetor of claim 3, wherein The carburetor further comprises a control member, the control member is threadedly connected to the shell, the control member is rotatable relative to the shell to adjust the flow space between the oil outlet passage and the float chamber.

Images