High-reliability flat suction type motorcycle carburetor

Abstract

The utility model relates to the technical field of motorcycle components, and discloses a high-reliability flat suction type motorcycle carburetor which comprises a shell, an opening is formed in the middle of the top end of the shell, a floater chamber is fixedly installed at the top end of the shell and located on the outer side of the opening, and a pneumatic floater is slidably connected into the floater chamber in a sealed mode. The bottom end of the pneumatic floater is hermetically and slidably connected into the opening. By adopting the design of the pneumatic floater structure, the floater structure comprises the floater chamber, the floater chamber is fixedly installed above the middle of the shell, the pneumatic floater is installed in the floater chamber in a sealed and sliding mode, when the pneumatic floater is pressed to rise, the pneumatic floater is compressed with air in the floater chamber, and when the pneumatic floater is not pressed, the pneumatic floater is compressed with air in the floater chamber. Compared with a spring piston type floater structure, the pneumatic floater structure has the advantage that the durability and the reliability of the pneumatic floater structure are better.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle components, in particular to a high-reliability flat-suction motorcycle carburetor. Background Art

[0002] A flat-draft motorcycle carburetor primarily consists of a float chamber, throat, metering orifice, nozzle, and throttle. It operates by utilizing the Bernoulli principle, which changes the cross-sectional area of ​​the intake duct to create negative pressure, thereby drawing in and atomizing the fuel. This atomized fuel mixes with air to form a combustible mixture that enters the engine for combustion.

[0003] The existing flat-draft motorcycle carburetors still have the following problems during use: their float structures mostly adopt a spring piston type float structure design, which mainly relies on the elastic force of the spring to reset the float. However, since the spring is easily damaged by excessive compression, it is very easy to cause damage to the entire float structure, resulting in poor reliability. Moreover, since the float structure is set inside the carburetor, it is not easy to replace. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a highly reliable flat-suction motorcycle carburetor, which solves the problems raised in the background art.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a highly reliable flat-suction motorcycle carburetor, comprising a shell, an opening being provided in the middle of the top of the shell, and a float chamber being fixedly installed on the top of the shell and located outside the opening, a pneumatic float being sealingly and slidingly connected in the float chamber, and the bottom end of the pneumatic float being sealingly and slidingly connected in the opening.

[0008] As a further solution of the present invention: a through hole is opened in the middle of the bottom end of the shell, and a metering hole connecting tube is fixedly installed in the through hole, a metering hole is provided at the bottom of the metering hole connecting tube, an oil needle is slidably installed at the top of the metering hole connecting tube, a fixed sleeve is fixedly connected to the center position of the bottom end of the pneumatic float, the top end of the oil needle is fixedly connected to the fixed sleeve, a throttle is provided at one end of the shell, an oil inlet is provided at the bottom front end of the metering hole connecting tube, and a fixing seat is fixedly connected to the bottom of the other end of the metering hole connecting tube.

[0009] As a further solution of the present invention: a circular hole is provided on the front end side of the outer wall of the outer shell, the throttle valve includes a connecting shaft which is sealed and rotatably connected to the circular hole, a through groove is provided between the two side walls of the connecting shaft located in the outer shell, a door panel is provided in the through groove, two through holes are provided between the upper and lower outer walls of the connecting shaft in a front-to-back symmetrical shape, and a matching hole is also provided between the upper and lower side walls of the door panel corresponding to the two through holes, and the same bolt is fixedly installed in the matching hole and the two through holes on the corresponding side.

[0010] As a further solution of the present invention: the connecting shaft is located on the other side of the front end outside the shell and is arranged in a convex shape, and a stopper is slidably fitted on the top of the protruding end of the front side of the connecting shaft, and the rear end of the stopper is fixedly connected to the outer side wall of the front end of the shell, and a circular hole is opened on one side of the top of the shell, and a joint is fixedly installed at the top of the shell and at the opening of the circular hole, and the upper outer side of the measuring hole connecting tube is fixedly connected to the bottom of the shell by a nut.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the utility model, a pneumatic float structure is adopted. The float structure includes a float chamber, which is fixedly installed above the middle part of the shell, and a pneumatic float is sealed and slidably installed in the float chamber. When the pneumatic float is pressurized and rises, the pneumatic float and the air in the float chamber are compressed. When the pneumatic float is not pressurized, the potential energy of the compressed air can push the pneumatic float to reset. Compared with the spring piston type float structure, the pneumatic float is more durable and reliable.

[0013] 2. In the utility model, a connecting shaft is provided through the throttle valve, and the connecting shaft is provided at the opening at one end of the outer shell, and the door plate of the valve is provided in the through groove in the middle of the connecting shaft, and the door plate and the connecting shaft are fixed by two bolts. The reliability of the overall throttle valve structure is high, and a block is provided to cooperate with the connecting shaft to prevent the connecting shaft from rotating excessively. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall three-dimensional Figure 1 ;

[0015] Figure 2 The overall three-dimensional Figure 2 ;

[0016] Figure 3 It is an overall sectional stereoscopic view of the present invention.

[0017] In the figure: 1. Housing; 2. Float chamber; 3. Pneumatic float; 4. Measuring hole connecting pipe; 5. Nut; 6. Oil needle; 7. Fixing sleeve; 8. Connecting shaft; 9. Bolt; 10. Door panel; 11. Connector; 12. Stopper; 13. Oil inlet; 14. Fixing seat. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] See also Figures 1 to 3 In the embodiment of the utility model, a high-reliability flat-suction motorcycle carburetor includes a shell 1, an opening is opened in the middle of the top of the shell 1, and a float chamber 2 is fixedly installed on the outside of the top of the shell 1 and located at the outside of the opening, a pneumatic float 3 is sealed and slidably connected in the float chamber 2, and the bottom end of the pneumatic float 3 is sealed and slidably connected in the opening. The whole adopts a pneumatic float structure design, and its float structure includes a float chamber 2, which is fixedly installed above the middle of the shell 1, and a pneumatic float 3 is sealed and slidably installed in the float chamber 2. When the pneumatic float 3 is pressurized and rises, the pneumatic float 3 and the air in the float chamber 2 are compressed. When the pneumatic float 3 is not pressurized, the potential energy of the compressed air can push the pneumatic float 3 to reset. Compared with the spring piston type float structure, its durability and reliability are better.

[0022] A through hole is provided in the middle of the bottom end of the shell 1, and a metering orifice connecting tube 4 is fixedly installed in the through hole, a metering hole is provided at the bottom of the metering orifice connecting tube 4, an oil needle 6 is slidably installed at the top of the metering orifice connecting tube 4, a fixed sleeve 7 is fixedly connected to the center position of the bottom end of the pneumatic float 3, the top end of the oil needle 6 is fixedly connected to the fixed sleeve 7, and the lifting of the pneumatic float 3 can drive the oil needle 6 to rise and fall. A throttle is provided at one end of the shell 1, and an oil inlet 13 is provided at the bottom front end of the metering orifice connecting tube 4, and oil can be injected into the metering orifice connecting tube 4 through the oil inlet 13. A fixing seat 14 is fixedly connected to the bottom of the other end of the metering orifice connecting tube 4, and the metering orifice connecting tube 4 can be fixed by the fixing seat 14 in conjunction with the fixing piece.

[0023] A circular hole is provided on the front end side of the outer wall of the outer shell 1, and the throttle valve includes a connecting shaft 8 that is sealed and rotatably connected to the circular hole. A through groove is provided between the connecting shaft 8 and the two side walls inside the outer shell 1, and a door panel 10 is provided in the through groove. Two through holes are provided between the upper and lower outer walls of the connecting shaft 8 in a front-to-back symmetrical shape, and matching holes are also provided between the upper and lower side walls of the door panel 10 corresponding to the two through holes. The same bolt 9 is fixedly installed in the matching hole and the two through holes on the corresponding side. The throttle valve is provided with a connecting shaft 8, and the connecting shaft 8 is provided at the opening at one end of the outer shell 1, and the door panel 10 of the valve is provided in the through groove in the middle of the connecting shaft 8, and the door panel 10 and the connecting shaft 8 are fixed by two bolts 9. The reliability of the overall throttle valve structure is high.

[0024] The connecting shaft 8 is located on the other side of the front end outside the shell 1 and is set in a convex shape. A stopper 12 is slidably fitted on the top of the protruding end of the front side of the connecting shaft 8. The rear end of the stopper 12 is fixedly connected to the outer side wall of the front end of the shell 1. A stopper 12 that cooperates with the connecting shaft 8 is provided to prevent the connecting shaft 8 from rotating excessively. A circular hole is opened on one side of the top of the shell 1, and a joint 11 is fixedly installed at the top of the shell 1 and at the opening of the circular hole. The upper outer side of the measuring hole connecting pipe 4 is fixedly connected to the bottom of the shell 1 by a nut 5, which fixes the measuring hole connecting pipe 4 to the bottom of the shell 1.

[0025] The working principle of the utility model is as follows: oil can be injected into the metering orifice connecting pipe 4 through the oil inlet 13. When the engine is running, air passes through the air filter and enters the carburetor through one end of the housing 1. When passing through the throat pipe in the housing 1, the cross-sectional area of ​​the throat pipe decreases, the air flow rate increases, the pressure decreases, and a negative pressure is generated at the throat pipe. The pneumatic float 3 in the float chamber 2 is pressurized and rises, driving the oil needle 6 to rise. Under the action of atmospheric pressure, the fuel in the metering orifice connecting pipe 4 is sucked into the throat pipe through the metering orifice and the nozzle above the metering orifice connecting pipe 4, where it mixes with the air to form a combustible mixture. The concentration of the mixture can be adjusted by the opening of the throttle plate 10. The larger the throttle opening, the more mixed gas enters the engine, and the greater the engine power. Conversely, the smaller the throttle opening, the less mixed gas enters the engine, and the lower the engine power.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-reliability flat-draft motorcycle carburetor, including a housing (1); Its characteristics are: An opening is provided in the middle of the top of the housing (1), and a float chamber (2) is fixedly installed on the top of the housing (1) and outside the opening. A pneumatic float (3) is sealingly and slidably connected in the float chamber (2), and the bottom end of the pneumatic float (3) is sealingly and slidably connected in the opening. A through hole is provided in the middle of the bottom end of the housing (1), and a metering hole connecting tube (4) is fixedly installed in the through hole. A metering hole is provided at the bottom of the metering hole connecting tube (4), and an oil needle (6) is slidably installed at the top of the metering hole connecting tube (4). A fixed sleeve (7) is fixedly connected to the center position of the bottom end of the pneumatic float (3), and the top end of the oil needle (6) is fixedly connected inside the fixed sleeve (7); A throttle valve is provided at one end of the housing (1); An oil inlet (13) is provided at the bottom of the front end of the metering hole connecting tube (4), and a fixing seat (14) is fixedly connected to the bottom of the other end of the metering hole connecting tube (4).

2. The high-reliability flat-draft motorcycle carburetor according to claim 1, characterized in that: A circular hole is provided on one side of the front end of the outer wall of the housing (1), and the throttle valve comprises a connecting shaft (8) which is sealed and rotatably connected to the circular hole.

3. The high-reliability flat-draft motorcycle carburetor according to claim 2, characterized in that: The connecting shaft (8) is provided with a through groove between the two side walls in the housing (1), a door panel (10) is provided in the through groove, and two through holes are provided in a front-to-back symmetrical shape between the upper and lower outer side walls of the connecting shaft (8).

4. The high-reliability flat-draft motorcycle carburetor according to claim 3, characterized in that: Matching holes are also provided between the two corresponding through holes on the upper and lower side walls of the door panel (10), and the same bolt (9) is fixedly installed in the matching hole and the two through holes on the corresponding side.

5. The high-reliability flat-draft motorcycle carburetor according to claim 2, characterized in that: The connecting shaft (8) is located on the other side of the front end outside the housing (1) and is arranged in a convex shape. A stopper (12) is slidably fitted on the top of the convex end on the front side of the connecting shaft (8).

6. The high-reliability flat-draft motorcycle carburetor according to claim 5, characterized in that: The rear end of the stopper (12) is fixedly connected to the front outer side wall of the housing (1).

7. The high-reliability flat-draft motorcycle carburetor according to claim 1, characterized in that: A circular hole is provided on one side of the top end of the housing (1), and a joint (11) is fixedly installed at the top end of the housing (1) and located at the opening of the circular hole. The upper outer side of the metering hole connecting pipe (4) is fixedly connected to the bottom of the housing (1) via a nut (5).

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