A carburetor with adjustable structure

Abstract

The invention discloses a carburetor with an adjustable structure, including a carburetor body, a rotary valve, and an enrichment valve. The carburetor body has a containing cavity, and the carburetor is provided with an injection pipe; the rotary valve has a mixing cavity, the rotary valve has a valve stem, the valve stem is provided with an oil needle, one side of the injection pipe is provided with an injection port, the oil needle is inserted into the injection pipe and extends to the injection port, the end of the valve stem is provided with a rocker arm, and the bottom of the rocker arm is provided with a slot; the enrichment valve is provided with a threaded through hole, the enrichment valve is provided with a swing arm buckle, the threaded through hole is threadedly connected with an adjustment pin, and one end of the adjustment pin presses the swing arm buckle toward the slot. When different carburetors are assembled, by screwing in or loosening the adjustment pin, the area where the injection port can spray oil is adjusted, so that the areas where the injection ports of different carburetors can spray oil are closer, the difference in the air-fuel ratio of the mixed gas in the starting state is reduced, and the air-fuel ratio of the mixed gas is better allowed to reach the air-fuel ratio required by the engine, which is conducive to the starting of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of vehicles, and in particular to a carburetor with an adjustable structure. Background Art

[0002] When the carburetor is in the starting state, the enrichment valve is needed to enrich the mixture in the carburetor to provide the engine with a mixture with a suitable air-fuel ratio, making it easier to start the engine. However, due to the existence of workpiece tolerances and matching tolerances, the area of ​​the injection port covered by the oil needle varies in size when the fuel injection port is in the starting state, that is, the area of ​​the injection port that can spray fuel varies in size, and the amount of fuel injection will be different. If the same enrichment valve is used, the air-fuel ratio of the mixture in the starting state will vary greatly, which is not conducive to the starting of the engine. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a carburetor with an adjustable structure, wherein the carburetor with an adjustable structure can adjust the area of ​​the fuel needle shielding the fuel injection port to reduce the difference in the air-fuel ratio of the mixed gas in the starting state, thereby facilitating the engine starting.

[0004] The present invention provides a carburetor with an adjustable structure, comprising a carburetor body, a rotary valve and an enrichment valve, wherein the carburetor body has an accommodating chamber, and the carburetor is provided with an oil injection pipe located in the accommodating chamber; the rotary valve has a mixing chamber, the rotary valve is located in the accommodating chamber, the oil injection pipe is inserted into the mixing chamber, the rotary valve has a valve stem, the valve stem is provided with an oil needle located in the mixing chamber, the length direction of the oil needle is parallel to the length direction of the valve stem, a fuel injection port is provided on one side of the fuel injection pipe, the oil needle is inserted into the fuel injection pipe and extends to the fuel injection port, a rocker arm is provided at the end of the valve stem, and a clamping groove is provided at the bottom of the rocker arm; the enrichment valve is arranged on the carburetor body, a threaded through hole is provided in the middle of the enrichment valve, a swing arm buckle matched with the clamping groove is provided at one end of the threaded through hole, the threaded through hole is threadedly connected with an adjusting nail, and one end of the adjusting nail presses the swing arm buckle toward the clamping groove.

[0005] The carburetor with an adjustable structure according to the embodiment of the present invention has at least the following beneficial effects: by screwing in or loosening the adjusting pin and allowing the rocker arm buckle to lift the rocker arm or allowing the rocker arm to drop along with the rocker arm buckle, the depth of the oil needle inserted into the fuel injection pipe can be changed, that is, the area over which the fuel injection port can spray fuel can be adjusted. Therefore, after different carburetors are assembled, the area over which the fuel injection port can spray fuel can be adjusted by screwing in or loosening the adjusting pin, so that the areas over which the fuel injection ports of different carburetors can spray fuel in the starting state can be closer, and the fuel injection amounts of different carburetors can be more stable, thereby narrowing the difference in the air-fuel ratio of the mixture in the starting state, and better allowing the air-fuel ratio of the mixture to reach the air-fuel ratio required by the engine, which is beneficial to engine starting.

[0006] According to some embodiments of the present invention, the carburetor body is provided with a valve cover, a rotation hole is provided in the middle of the valve cover, the valve stem passes through the rotation hole and the rocker arm is located on a side of the valve cover away from the carburetor body, and the enrichment valve is arranged on the valve cover.

[0007] According to some embodiments of the present invention, the valve cover is provided with a mounting seat, the mounting seat is provided with a mounting hole, and the enrichment valve is located in the mounting hole.

[0008] According to some embodiments of the present invention, a fixing groove is provided on the outer side of the enrichment valve, the length direction of the fixing groove is parallel to the direction of the mounting hole, and the mounting seat is provided with a fixing pin inserted into the fixing groove.

[0009] According to some embodiments of the present invention, a limit head is provided at one end of the enrichment valve away from the clamping groove, and the outer diameter of the limit head is larger than the inner diameter of the mounting hole.

[0010] According to some embodiments of the present invention, the enrichment valve is provided with a flat position, and the mounting hole is provided with a flat position surface matched with the flat position.

[0011] According to some embodiments of the present invention, the carburetor body is provided with an input port connected to the fuel injection pipe.

[0012] According to some embodiments of the present invention, the insertion end of the oil needle is provided with a first chamfer.

[0013] According to some embodiments of the present invention, a second chamfer is provided at one end of the adjusting pin facing the slot.

[0014] According to some embodiments of the present invention, an outer diameter of an end of the adjusting pin away from the clamping slot is smaller than an inner diameter of the threaded through hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of a decomposed structure according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 The cross-sectional structure diagram of the carburetor body and the rotary valve is shown in FIG.

[0019] Reference numerals:

[0020] Carburetor body 100, accommodating chamber 110, fuel injection pipe 120, fuel injection port 130, valve cover 140, rotation hole 141, mounting seat 142, mounting hole 143, fixing pin 144, flat surface 145, input port 150,

[0021] Rotary valve 200, mixing chamber 210, valve stem 220, oil needle 230, first chamfer 231, rocker arm 240, slot 241,

[0022] The enrichment valve 300 , the threaded through hole 310 , the swing arm buckle 320 , the adjustment pin 330 , the second chamfer 321 , the fixing groove 340 , the limit head 350 , and the flat position 360 . DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 1 to Figure 2A carburetor with an adjustable structure includes a carburetor body 100, a rotary valve 200, and a enrichment valve 300. The carburetor body 100 has a receiving chamber 110, and the carburetor is provided with an injection pipe 120 located in the receiving chamber 110; the rotary valve 200 has a mixing chamber 210, the rotary valve 200 is located in the receiving chamber 110, the injection pipe 120 is inserted into the mixing chamber 210, the rotary valve 200 has a valve stem 220, the valve stem 220 is provided with an oil needle 230 located in the mixing chamber 210, the length direction of the oil needle 230 is the same as the length direction of the valve stem 220, and the injection pipe 120 is inserted into the mixing chamber 210. 0 is provided with a fuel injection port 130 on one side, a fuel needle 230 is inserted into the fuel injection pipe 120 and extends to the fuel injection port 130, a rocker arm 240 is provided at the end of the valve stem 220, and a clamping groove 241 is provided at the bottom of the rocker arm 240; the enrichment valve 300 is provided on the carburetor body 100, a threaded through hole 310 is provided in the middle of the enrichment valve 300, and a rocker arm buckle 320 adapted to the clamping groove 241 is provided at one end of the threaded through hole 310 of the enrichment valve 300, and an adjusting pin 330 is threadedly connected to the threaded through hole 310, and one end of the adjusting pin 330 presses the rocker arm buckle 320 toward the clamping groove 241. The valve stem 220 of the rotary valve 200 is parallel to the length direction of the fuel needle 230, and the valve stem 220, the fuel needle 230 and the rocker arm 240 of the rotary valve 200 are threadedly connected to form a whole that can move together. The fuel injection pipe 120 is provided with a socket, and the fuel needle 230 is inserted into the fuel injection pipe 120 from the socket, so that the insertion end of the fuel needle 230 extends to the fuel injection port 130 on the side of the fuel injection pipe 120, so that the insertion end of the fuel needle 230 can cover part or all of the fuel injection port 130, so as to adjust the size of the fuel injection port 130 and adjust the oil output of the fuel injection port 130. The swing arm buckle 320 of the enrichment valve 300 is buckled on the slot 241, that is, the top of the swing arm buckle 320 is against the bottom of the slot 241, when the adjustment pin 330 is turned to approach the slot 241, the top of the swing arm buckle 320 will rise under the push of the insertion end of the adjustment pin 330, thereby raising the height of the rocker arm 240 and the fuel needle 230, so that the area of ​​the fuel injection port 130 covered by the insertion end of the fuel needle 230 becomes smaller, and the area of ​​the fuel injection port 130 that can spray fuel increases. Similarly, when the adjusting pin 330 is away from the card slot 241, the top height of the swing arm buckle 320 will gradually decrease as the adjusting pin 330 is withdrawn, so that the height of the rocker arm 240 and the oil needle 230 can be lowered, so that the insertion end of the oil needle 230 can better shield the fuel injection port 130, and reduce the area where the fuel injection port 130 can spray fuel. That is, by screwing in or loosening the adjusting pin 330, the area where the fuel injection port 130 can spray fuel can be adjusted. Therefore, after the carburetor is assembled, the area where the fuel injection port 130 can spray fuel can be adjusted by screwing in or loosening the adjusting pin 330, so that the area where the fuel injection port 130 of the carburetor can spray fuel in the starting state is closer, the fuel injection amount is more stable, the air-fuel ratio difference of the mixed gas in the starting state is reduced, and the air-fuel ratio of the mixed gas can better reach the air-fuel ratio required by the engine, which is conducive to the engine starting.

[0028] Reference Figure 1 to Figure 2 In some embodiments of the present invention, the carburetor body 100 is provided with a valve cover 140, a rotation hole 141 is provided in the middle of the valve cover 140, the valve stem 220 passes through the rotation hole 141, and the rocker arm 240 is located on the side of the valve cover 140 away from the carburetor body 100, and the enrichment valve 300 is arranged on the valve cover 140. The valve cover 140 is fixed to the carburetor body 100 by screws, the rotation hole 141 is used for the valve stem 220 to pass through, and the rocker arm 240 is located at one end of the valve stem 220 where the valve stem 220 passes through the rotation hole 141. The valve cover 140 can fix the rotary valve on the carburetor body 100 to prevent the rotary valve from falling off. The enrichment valve 300 is installed on the valve cover 140, so that the enrichment valve 300 can better support the rocker arm 240, which is convenient for adjusting the height of the oil needle 230. Among them, the valve stem 220 can be raised and lowered along the rotating hole 141, so that the rocker arm buckle 320 can adjust the height of the oil needle 230, so as to facilitate the adjustment of the area where the injection port 130 can spray oil.

[0029] Reference Figure 1 to Figure 2 In some embodiments of the present invention, the valve cover 140 is provided with a mounting seat 142, and the mounting seat 142 is provided with a mounting hole 143, and the enrichment valve 300 is located in the mounting hole 143. The mounting seat 142 is used to install the enrichment valve 300, wherein the mounting seat 142 covers the enrichment valve 300, so that the enrichment valve 300 is better fixed on the valve cover 140.

[0030] Reference Figure 1 to Figure 2 In some embodiments of the present invention, a fixing groove 340 is provided on the outer side of the enrichment valve 300, the length direction of the fixing groove 340 is parallel to the direction of the mounting hole 143, and the mounting seat 142 is provided with a fixing pin 144 inserted into the fixing groove 340. The fixing pin 144 is used to fix the position of the enrichment valve 300 to prevent the enrichment valve 300 from falling from the mounting hole 143, and the end of the fixing pin 144 is smaller than the length of the fixing groove 340, so that the enrichment valve 300 can be moved along the fixing groove 340, and the fixing pin 144 can be easily installed and inserted into the fixing groove 340.

[0031] Reference Figure 1 to Figure 2 In some embodiments of the present invention, a limit head 350 is provided at one end of the enrichment valve 300 away from the slot 241, and the outer diameter of the limit head 350 is larger than the inner diameter of the mounting hole 143. The limit head 350 can prevent the enrichment valve 300 from excessively extending into the mounting hole 143, avoid installation offside, and facilitate assembly.

[0032] Reference Figure 1 to Figure 2In some embodiments of the present invention, the enrichment valve 300 is provided with a flat position 360, and the mounting hole 143 is provided with a flat position surface 145 adapted to the flat position 360. The flat position 360 allows the enrichment valve 300 to be better positioned and inserted into the mounting hole 143, and can also prevent the enrichment valve 300 from rotating, making it easier to install the enrichment valve 300, and allowing the swing arm buckle 320 to better lift the clamping groove 241 on the rocker arm 240.

[0033] Reference Figure 1 to Figure 2 In some embodiments of the present invention, the carburetor body 100 is provided with an input port 150 connected to the fuel injection pipe 120. The input port 150 is used to connect to the fuel tank so that gasoline can be input into the carburetor from here for starting.

[0034] Reference Figure 1 to Figure 2 In some embodiments of the present invention, the insertion end of the oil needle 230 is provided with a first chamfer 231, which can make it easier for the oil needle 230 to be inserted into the fuel injection pipe 120, thereby facilitating assembly.

[0035] Reference Figure 1 to Figure 2 In some embodiments of the present invention, a second chamfer 321 is provided at one end of the adjusting pin 330 facing the slot 241, so that the adjusting pin 330 can better abut against the swing arm buckle 320 to prevent the swing arm buckle 320 from being cut off due to the sharp end of the adjusting pin 330, and the contact area between the adjusting pin 330 and the swing arm buckle 320 can be larger, making it easier for the adjusting pin 330 to push the swing arm buckle 320.

[0036] Reference Figure 1 to Figure 2 In some embodiments of the present invention, the outer diameter of the end of the adjusting pin 330 away from the slot 241 is smaller than the inner diameter of the threaded through hole 310. That is, the adjusting pin 330 can be fully inserted into the threaded through hole 310, which plays the role of shielding the adjusting pin 330 and is more beautiful.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0039] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A carburetor with an adjustable structure, characterized in that: include: A carburetor body (100) having a receiving chamber (110), wherein the carburetor is provided with a fuel injection pipe (120) located in the receiving chamber (110); A rotary valve (200) having a mixing chamber (210), the rotary valve (200) being located in the accommodating chamber (110), the fuel injection pipe (120) being inserted into the mixing chamber (210), the rotary valve (200) having a valve stem (220), the valve stem (220) being provided with a fuel needle (230) being located in the mixing chamber (210), the length direction of the fuel needle (230) being parallel to the length direction of the valve stem (220), a fuel injection port (130) being provided on one side of the fuel injection pipe (120), the fuel needle (230) being inserted into the fuel injection pipe (120) and extending to the fuel injection port (130), a rocker arm (240) being provided at the end of the valve stem (220), and a clamping groove (241) being provided at the bottom of the rocker arm (240); An enrichment valve (300) is arranged on the carburetor body (100); a threaded through hole (310) is arranged in the middle of the enrichment valve (300); a swing arm buckle (320) adapted to the clamping groove (241) is arranged at one end of the threaded through hole (310); an adjustment pin (330) is threadedly connected to the threaded through hole (310); one end of the adjustment pin (330) presses the swing arm buckle (320) toward the clamping groove (241); The carburetor body (100) is provided with a valve cover (140), a rotation hole (141) is provided in the middle of the valve cover (140), the valve stem (220) passes through the rotation hole (141), and the rocker arm (240) is located on a side of the valve cover (140) away from the carburetor body (100), the enrichment valve (300) is arranged on the valve cover (140), the valve cover (140) is provided with a mounting seat (142), the mounting seat (142) is provided with a mounting hole (143), the enrichment valve (300) is located in the mounting hole (143), and the A fixing groove (340) is provided on the outer side of the enrichment valve (300), the length direction of the fixing groove (340) is parallel to the direction of the mounting hole (143), the mounting seat (142) is provided with a fixing pin (144) inserted into the fixing groove (340), a limiting head (350) is provided at one end of the enrichment valve (300) away from the clamping groove (241), the outer diameter of the limiting head (350) is larger than the inner diameter of the mounting hole (143), and the outer diameter of one end of the adjusting pin (330) away from the clamping groove (241) is smaller than the inner diameter of the threaded through hole (310).

2. A carburetor with an adjustable structure according to claim 1, characterized in that: The enrichment valve (300) is provided with a flat portion (360), and the mounting hole (143) is provided with a flat portion surface (145) adapted to the flat portion (360).

3. The carburetor with an adjustable structure according to claim 1, characterized in that: The carburetor body (100) is provided with an input port (150) connected to the fuel injection pipe (120).

4. A carburetor with an adjustable structure according to claim 1, characterized in that: The insertion end of the oil needle (230) is provided with a first chamfer (231).

5. The carburetor with an adjustable structure according to claim 1, characterized in that: One end of the adjusting pin (330) facing the clamping slot (241) is provided with a second chamfer (321).

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