Oil-rich simple starting carburetor

Abstract

The utility model belongs to the field of engines, and provides an oil-rich carburetor easy to start. Comprising a body, a choke valve and an oil supplementing valve. Wherein an oil-gas mixing channel, an oil inlet connector used for being connected with an external oil can and a main nozzle arranged in the oil-gas mixing channel and connected to the oil inlet connector are formed in the body; the choke valve is arranged at one end of the oil-gas mixing channel and forms a notch used for increasing the gas inflow of the oil-gas mixing channel. The oil supplementing valve comprises a valve body, an oil pumping ball made of elastic materials and a one-way cap made of elastic materials, an oil supplementing connector, an oil return connector and an oil suction connector are further formed in the valve body, an oil supplementing pipe is connected between the oil supplementing connector and the oil-gas mixing channel, the oil return connector is communicated with an external oil can, and an oil suction pipe is connected between the oil suction connector and the oil inlet connector.

Description

Technical Field

[0001] The present application belongs to the field of engines, and more specifically, relates to an oil-rich simple starting carburetor. Background Art

[0002] In a general-purpose gasoline engine, a carburetor is usually used to mix the fuel in the fuel supply system with air to form a gas mixture to supply the engine. In the prior art, when starting a general-purpose gasoline engine, the air content is usually reduced by closing the choke to relatively increase the proportion of fuel vapor in the air. Although this method increases the concentration of the mixed gas, it is still not easy to start due to the reduction of intake air. For this reason, the choke needs to be manually half-opened during the starting process. This operation method is also a common general-purpose engine starting method: when people start a general-purpose engine, they first close the choke, manually pump oil, and then half-pull the pull rope for starting, so that the general-purpose engine makes a puffing sound, and then open the choke to a half-open state, and then pull the pull rope hard to start the engine and warm it up, and then open the choke to full open. The operation is complicated and requires certain skills; the engine needs a longer starting time. Simply increasing the intake passage of the choke will reduce the concentration of the combustible mixture, so that the ignition concentration cannot be reached. Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an oil-rich simple starting carburetor to solve the technical problem of difficult cold starting of an engine in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is: to provide an oil-rich simple starting carburetor, comprising:

[0005] A main body, forming an oil-gas mixing passage, an oil inlet interface for connecting to an external oil pot, and a main nozzle disposed in the oil-gas mixing passage and connected to the oil inlet interface;

[0006] A choke, disposed at one end of the oil-gas mixing passage and forming a notch for increasing the air intake amount of the oil-gas mixing passage;

[0007] The oil replenishing valve comprises a valve body and an oil pump ball made of an elastic material, wherein the oil pump ball is connected to the valve body and cooperates with the valve body to form a first cavity, the valve body is used to form a vertical depression on the end surface of the first cavity to form a second cavity and an annular groove arranged around the second cavity, the oil replenishing valve also comprises a one-way cap made of an elastic material, the one-way cap has a guide portion slidably connected to the side wall of the second cavity and an umbrella portion connected to the guide portion and used to abut against the end surface of the valve body, the annular groove is entirely located within the edge contour range of the umbrella portion and can abut against the umbrella portion The end face of the valve body is connected to the valve body and isolated from the first cavity. The guide portion forms a gap that can be opened when the pressure in the first cavity exceeds a threshold value to connect the first cavity and the second cavity. The valve body also forms an oil replenishment interface, an oil replenishment hole connecting the oil replenishment interface and the first cavity, an oil return interface connecting the second cavity, and an oil suction interface connecting the annular groove. An oil replenishment pipe is connected between the oil replenishment interface and the oil-gas mixing channel, the oil return interface is connected to an external oil pot, and an oil suction pipe is connected between the oil suction interface and the oil inlet interface.

[0008] Optionally, the oil replenishing valve further comprises a valve sleeve disposed in the second cavity and coaxial with the guide portion, and the guide portion passes through the valve sleeve and is slidably connected to the valve sleeve.

[0009] Optionally, the one-way cap has a convex ring protruding from the surface of the guide portion along the radial direction of the guide portion, and the guide portion is slidably connected to the valve sleeve via the convex ring.

[0010] Optionally, one end of the oil replenishing pipe leading to the oil-gas mixing passage is connected to a one-way valve for enabling one-way conduction from the oil replenishing pipe to the oil-gas mixing passage.

[0011] Optionally, the one-way valve comprises a valve hole connected to the oil replenishing pipe and a sealing gasket abutting against the valve hole, and further comprises a baffle plate spaced apart from the sealing gasket and a spring with two ends respectively abutting against the sealing gasket and the baffle plate;

[0012] The spring has a preset restoring elastic force so that the sealing gasket can automatically close the valve hole.

[0013] Optionally, an oil replenishing hole with a fixed diameter is formed on the main body, one end of the oil replenishing hole is connected to the oil-gas mixing channel, and the other end is connected to the oil outlet end of the one-way valve.

[0014] Optionally, the oil replenishing valve further comprises a copper sleeve which is arranged on the main body and is used to fix the oil replenishing pipe, and the oil replenishing pipe passes through the copper sleeve and is connected to the one-way valve.

[0015] The beneficial effects of the oil-rich simple starting carburetor provided by the present application are as follows: compared with the prior art, in the oil-rich simple starting carburetor provided by the present application, the choke forms a gap for increasing the air intake amount of the oil-gas mixing channel, which can increase the air intake amount in the oil-gas mixing channel; by squeezing the pump oil ball in the oil replenishing valve, the fuel in the first cavity can be transported to the oil-gas mixing channel through the oil replenishing hole, the oil replenishing joint and the oil replenishing pipe in sequence, and mixed with the fuel entering the oil-gas mixing channel from the main nozzle, that is, the amount of fuel entering the oil-gas mixing channel is quantitatively increased, so that the oil-gas mixing channel is in an oil-rich state and adapts to the air amount increased by the choke gap design, so that the combustible mixed gas in the oil-gas mixing channel can quickly reach the ignition concentration. For an engine using the carburetor of the present technical solution, it is only necessary to close the choke, squeeze the pump oil ball, fully pull the pull rope to start the engine to warm up, and then open the choke to full open, which significantly improves the starting reliability of the engine, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 The overall structure of the rich oil easy start carburetor provided in the embodiment of the present application is schematically shown. Figure 1 ;

[0018] Figure 2 The overall structure of the rich oil easy start carburetor provided in the embodiment of the present application is schematically shown. Figure 2 ;

[0019] Figure 3 The overall structure of the rich oil easy start carburetor provided in the embodiment of the present application is schematically shown. Figure 3 ;

[0020] Figure 4 The overall structure of the rich oil easy start carburetor provided in the embodiment of the present application is schematically shown. Figure 4 ;

[0021] Figure 5 A partial structural cross-section of the oil replenishment valve provided in the embodiment of the present application Figure 1 ;

[0022] Figure 6 A partial structural cross-section of the oil replenishment valve provided in the embodiment of the present application Figure 2 ;

[0023] Figure 7A cross-sectional view of a local structure of a one-way valve provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of the choke structure provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the one-way cap structure provided in an embodiment of the present application.

[0026] 10. The axial flowmeter of the present invention is as follows: 100, main body; 101, oil-gas mixing channel; 102, oil inlet interface; 103, main nozzle; 104, oil replenishing hole; 200, choke; 201, notch; 300, oil replenishing valve; 301, valve body; 302, pump oil ball; 303, first cavity; 304, second cavity; 305, annular groove; 306, one-way cap; 307, oil replenishing interface; 308, oil replenishing hole; 309, return oil interface; 310, oil suction interface; 311, oil replenishing pipe; 312, oil suction pipe; 313, valve sleeve; 314, copper sleeve; 361, guide part; 362, umbrella part; 363, gap; 364, convex ring; 400, one-way valve; 401, valve hole; 402, sealing gasket; 403, baffle; 404, spring. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] Please also read Figures 1 to 9 Now, a rich oil simple starting carburetor provided in an embodiment of the present application is described. The rich oil simple starting carburetor comprises a body 100, a choke 200 and an oil replenishing valve 300. Among them:

[0032] The main body 100 forms an oil-gas mixing channel 101, an oil inlet interface 102 for connecting an external oil tank, and a main nozzle 103 disposed in the oil-gas mixing channel 101 and connected to the oil inlet interface 102. The main nozzle 103 provided in this embodiment is mainly used to inject fuel into the oil-gas mixing channel 101. The choke 200 is disposed at one end of the oil-gas mixing channel 101 and forms a notch 201 for increasing the air intake of the oil-gas mixing channel 101. The notch 201 disposed on the choke 200 can increase the air intake of the oil-gas mixing channel 101. Here, it can be understood that the metering chamber disposed between the oil inlet interface 102 and the main nozzle 103 and other component structures for controlling the oil intake of the main nozzle 103 adopt the existing technology of the carburetor, which will not be repeated here.

[0033] The oil replenishing valve 300 includes a valve body 301 and an oil pump ball 302 made of elastic material. The oil pump ball 302 is connected to the valve body 301 and cooperates with the valve body 301 to form a first cavity 303. The valve body 301 is used to form a vertical depression on the end surface of the first cavity 303 to form a second cavity 304 and an annular groove 305 arranged around the second cavity 304. The oil replenishing valve 300 also includes a one-way cap 306 made of elastic material. The one-way cap 306 has a guide portion 361 slidably connected to the side wall of the second cavity 304 and an umbrella portion 362 connected to the guide portion 361 and used to abut on the end surface of the valve body 301. The annular groove 305 is entirely located within the edge contour range of the umbrella portion 362 and can abut on the umbrella portion 362. After being connected to the end face of the valve body 301, it is isolated from the first cavity 303. The guide portion 361 forms a gap 363 which can be opened when the pressure in the first cavity 303 exceeds a threshold value to connect the first cavity 303 with the second cavity 304. The valve body 301 also forms an oil replenishment interface 307, an oil replenishment hole 308 connecting the oil replenishment interface 307 and the first cavity 303, an oil return interface 309 connected to the second cavity 304, and an oil suction interface 310 connected to the annular groove 305. An oil replenishment pipe 311 is connected between the oil replenishment interface 307 and the oil-gas mixing channel 101, the oil return interface 309 is connected to an external oil pot, and an oil suction pipe 312 is connected between the oil suction interface 310 and the oil inlet interface 102.

[0034] According to the above structure provided in the present embodiment, the choke 200 is provided with a notch 201, which will cause the air intake in the oil-gas mixing channel 101 to increase but the fuel gas concentration to decrease. Therefore, in order to supplement the fuel concentration in the oil-gas mixing channel 101, the fuel in the first cavity 303 can be transported to the oil-gas mixing channel 101 through the oil replenishing hole 308, the oil replenishing joint and the oil replenishing pipe 311 in sequence by squeezing the pump oil ball 302 and causing the pump oil ball 302 to undergo elastic deformation, and then mixed with the fuel entering the oil-gas mixing channel 101 from the main nozzle 103. That is, the amount of fuel entering the oil-gas mixing channel 101 is quantitatively increased, so that the oil-gas mixing channel 101 is in an oil-rich state and adapts to the air volume increased by the choke gap design, so that the oil-gas mixing channel is in an oil-rich state, thereby enabling the combustible mixed gas in the oil-gas mixing channel 101 to quickly reach an ignition concentration. When starting an engine with a carburetor using the technical solution, it is only necessary to close the choke, squeeze the pump oil ball, fully pull the pull rope to start the engine to warm it up, and then open the choke to full open, which significantly improves the starting reliability of the engine and is far superior to the existing technology.

[0035] In the process of refueling the oil-gas mixing channel 101, squeezing the pump oil ball 302 will increase the pressure in the first cavity 303. On the one hand, the pressure in the inner cavity of the guide portion 361 in the one-way cap 306 can reach the pressure threshold. Fig. 9The guide portion 361 is a hollow structure and has a trapezoidal longitudinal cross-section, and the gap 363 is provided at the bottom of the guide portion 361, so that when the pressure in the inner cavity of the guide portion 361 reaches the pressure threshold, the gap 363 on the guide portion 361 will open and connect the first cavity 303 and the second cavity 304; in this way, the fuel in the first cavity 303 can also flow back to the external oil pot through the second cavity 304 and the return oil interface 309 connected to the second cavity 304, which can save fuel and reduce the oil pressure in the first cavity 303. In this way, the amount of oil added to the oil-gas mixing channel 101 is ensured to be kept within the set value through the synergistic effect of the oil replenishment hole 104 and the gap 363. In addition, the umbrella portion 362 in the one-way cap 306 will be driven by the fuel in the first cavity 303 to press against the end face of the valve body 301 used to form the first cavity 303, thereby isolating the first cavity 303 and the annular groove 305, which is beneficial to prevent the fuel in the first cavity 303 from flowing back from the annular groove 305 to the oil inlet interface 102.

[0036] When the pump oil ball 302 loses external pressure, negative pressure will be formed inside. In this way, on the one hand, the oil pressure on the guide part 361 will instantly be lower than the threshold of the guide part 361 and the entity of the guide part 361 will shrink toward its own interior, thereby automatically closing the gap 363 set on the guide part 361, thereby isolating the first cavity 303 and the second cavity 304 and preventing the fuel in the first cavity 303 from flowing back from the second cavity 304 to the external oil pot. On the other hand, the umbrella part 362 of the one-way cap 306 will be driven away from the end face of the valve body 301 by the fuel in the first cavity 303, so that the first cavity 303 and the annular groove 305 are connected, so that the fuel in the external oil pot can flow from the oil inlet interface 102, the oil inlet pipe and the oil suction interface 310 to the first cavity 303 in turn and replenish the fuel in the first cavity 303, thereby realizing the recycling of the first cavity 303, with good use effect.

[0037] In another embodiment of the present application, please refer to Figures 1 to 9 The oil replenishing valve 300 further includes a valve sleeve 313 disposed in the second cavity 304 and coaxial with the guide portion 361, and the guide portion 361 passes through the valve sleeve 313 and is slidably connected to the valve sleeve 313. According to the above structure provided in this embodiment, the movement stability of the guide portion 361 can be significantly improved by sleeved on the guide portion 361, which is conducive to further reducing the starting difficulty of the rich oil easy starting carburetor in this embodiment.

[0038] In another embodiment of the present application, please refer to Figures 1 to 9The one-way cap has a protruding ring 364 protruding from the surface of the guide portion 361 along the radial direction of the guide portion 361, and the guide portion 361 is slidably connected to the valve sleeve 313 through the protruding ring 364. According to the above structure provided in this embodiment, the protruding ring 364 provided on the guide portion 361 is conducive to achieving a tighter connection between the guide portion 361 and the valve sleeve 313, and can better isolate the first cavity 303 and the second cavity 304, so that the oil pressure output from the first cavity 303 from the oil replenishing hole 308 is more stable, which is conducive to further reducing the starting difficulty of the rich oil easy starting carburetor in this embodiment.

[0039] In another embodiment of the present application, please refer to Figures 1 to 9 One end of the oil replenishing pipe 311 leading to the oil-gas mixing passage 101 is connected to a one-way valve 400 for one-way conduction from the oil replenishing pipe 311 to the oil-gas mixing passage 101. According to the above structure provided in this embodiment, by providing a one-way conduction one-way valve 400 between the oil replenishing pipe 311 and the oil-gas mixing passage 101, it is helpful to prevent the fuel in the oil-gas mixing passage 101 from flowing back into the oil replenishing pipe 311, and further, it is helpful to enable the rich oil simple starting carburetor provided in this embodiment to be used stably for a long time.

[0040] In another embodiment of the present application, please refer to Figures 1 to 9 The one-way valve 400 includes a valve hole 401 connected to the oil replenishing pipe 311 and a sealing gasket 402 abutting against the valve hole 401, and also includes a baffle 403 spaced apart from the sealing gasket 402 and a spring 404 with two ends respectively abutting against the sealing gasket 402 and the baffle 403, and the spring 404 has a preset restoring elastic force to enable the sealing gasket 402 to automatically close the valve hole 401. According to the above structure provided in this embodiment, when the oil pressure output from the oil replenishing pipe 311 is greater than the pressure of the spring 404, the sealing gasket 402 and the valve hole 401 can be separated, so that the fuel in the oil replenishing pipe 311 can smoothly enter the oil-gas mixing channel 101, and when the oil pressure output from the oil replenishing pipe 311 is less than the pressure of the spring 404, the sealing gasket 402 can well close the valve hole 401, thereby isolating the oil replenishing pipe 311 and the oil-gas mixing channel 101, and achieving the one-way conduction effect of the one-way valve 400 in this embodiment.

[0041] In another embodiment of the present application, please refer to Figures 1 to 9 A fixed diameter oil filling hole 104 is formed on the main body 100, one end of the oil filling hole 104 is connected to the oil-gas mixing channel 101, and the other end is connected to the oil outlet end of the one-way valve 400. According to the above structure provided in this embodiment, the fixed diameter oil filling hole 104 can be used to better control the amount of fuel entering the oil-gas mixing channel 101 from the oil filling pipe 311, which is conducive to more accurately controlling the concentration of the combustible mixed gas and further reducing the starting difficulty of the rich oil simple starting carburetor in this embodiment.

[0042] In another embodiment of the present application, please refer to Figures 1 to 9 The oil replenishing valve 300 further includes a copper sleeve 314 disposed on the body 100 and used to fix the oil replenishing pipe 311. The oil replenishing pipe 311 passes through the copper sleeve 314 and is connected to the one-way valve 400. According to the above structure provided in this embodiment, the copper sleeve 314 disposed on the body 100 can more stably support and fix the oil replenishing pipe 311, which is conducive to the long-term and stable use of the rich oil simple starting carburetor provided in this embodiment.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A rich oil simple starting carburetor, characterized in that: include: A main body (100) is formed with an oil-gas mixing passage (101), an oil inlet interface (102) for connecting to an external oil tank, and a main nozzle (103) disposed in the oil-gas mixing passage (101) and connected to the oil inlet interface (102); A choke (200) is arranged at one end of the oil-gas mixing passage (101) and forms a notch (201) for increasing the air intake amount of the oil-gas mixing passage (101); The oil replenishing valve (300) comprises a valve body (301) and an oil pumping ball (302) made of an elastic material, wherein the oil pumping ball (302) is connected to the valve body (301) and cooperates with the valve body (301) to form a first cavity (303), the valve body (301) is used to form a vertical depression on the end surface of the first cavity (303) to form a second cavity (304) and an annular groove (305) arranged around the second cavity (304), and the oil replenishing valve (300) further comprises a one-way cap (306) made of an elastic material, wherein the one-way cap (306) comprises a guide portion (361) slidably connected to the side wall of the second cavity (304) and an umbrella portion (362) connected to the guide portion (361) and used to abut against the end surface of the valve body (301), wherein the annular groove (305) is entirely located within the edge contour range of the umbrella portion (362) and can abut against the umbrella portion (362). After being connected to the end surface of the valve body (301), it is isolated from the first cavity (303); the guide portion (361) forms a gap (363) that can be opened when the pressure in the first cavity (303) exceeds a threshold value to connect the first cavity (303) and the second cavity (304); the valve body (301) is also formed with an oil replenishment interface (307), an oil replenishment hole (308) connecting the oil replenishment interface (307) and the first cavity (303), an oil return interface (309) connecting the second cavity (304), and an oil suction interface (310) connecting the annular groove (305); an oil replenishment pipe (311) is connected between the oil replenishment interface (307) and the oil-gas mixing channel (101); the oil return interface (309) is connected to an external oil pot; and an oil suction pipe (312) is connected between the oil suction interface (310) and the oil inlet interface (102).

2. The rich oil easy start carburetor according to claim 1, characterized in that: The oil replenishing valve (300) further comprises a valve sleeve (313) which is arranged in the second cavity (304) and is coaxial with the guide portion (361); the guide portion (361) passes through the valve sleeve (313) and is slidably connected to the valve sleeve (313).

3. The rich oil easy start carburetor according to claim 2, characterized in that: The one-way cap (306) has a convex ring (364) protruding from the surface of the guide portion (361) along the radial direction of the guide portion (361), and the guide portion (361) is slidably connected to the valve sleeve (313) via the convex ring (364).

4. The rich oil easy start carburetor according to claim 1, characterized in that: One end of the oil replenishment pipe (311) leading to the oil-gas mixing passage (101) is connected to a one-way valve (400) for enabling one-way conduction from the oil replenishment pipe (311) to the oil-gas mixing passage (101).

5. The rich oil easy start carburetor according to claim 4, characterized in that: The one-way valve (400) comprises a valve hole (401) connected to the oil supply pipe (311) and a sealing gasket (402) abutting against the valve hole (401), and also comprises a baffle (403) spaced apart from the sealing gasket (402) and a spring (404) with two ends respectively abutting against the sealing gasket (402) and the baffle (403); The spring (404) has a preset restoring elastic force so that the sealing gasket (402) can automatically close the valve hole (401).

6. The rich oil easy start carburetor according to claim 5, characterized in that: An oil replenishment hole (104) with a fixed diameter is formed on the body (100); one end of the oil replenishment hole (104) is connected to the oil-gas mixing channel (101), and the other end is connected to the oil outlet end of the one-way valve (400).

7. The rich oil easy start carburetor according to claim 4, characterized in that: The oil replenishment valve (300) further comprises a copper sleeve (314) arranged on the body (100) and used to fix the oil replenishment pipe (311); the oil replenishment pipe (311) passes through the copper sleeve (314) and is connected to the one-way valve (400).

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