Carburetor of outboard engine
By designing a raised loop protection nut in the outboard carburetor and combining the design of spring and internal threads, the problem of the adjustment screw being susceptible to collision and bending due to the nut is solved, achieving long-term use and convenient adjustment of the carburetor.
Patent Information
- Application Number
- CN202421571608.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The adjustment screws of the existing outboard carburetor are susceptible to collision and bend due to exposure of the nut, which cannot be twisted and loses the adjustment function, affecting the service life of the carburetor.
An outboard carburetor is designed, with the raised collar of the adjustment channel outer edge protecting the nuts of the adjustment screws, preventing collision bending, and enhancing the connection stability through springs and internal threads.
It effectively protects the nuts of the adjustment screws, prevents bending, ensures the normal operation of the adjustment screws, extends the service life of the carburetor, simplifies the adjustment process, and improves assembly efficiency.
Smart Images
Figure CN222633326U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine accessories, in particular to an outboard engine carburetor. Background Art
[0002] The carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the engine. As a precision mechanical device, the carburetor uses the kinetic energy of the inhaled air flow to atomize the gasoline. The carburetor will automatically proportion the corresponding concentration and output the corresponding amount of mixed gas according to the different working state requirements of the engine. In order to make the mixed gas mixed more evenly, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine.
[0003] An outboard motor is a propulsion engine installed on the outside of a ship's side, and is also equipped with a carburetor. An adjusting screw for adjusting the fuel flow is usually installed on the outboard motor carburetor. The outboard motor carburetor body and the adjusting screw in the prior art are only connected by threads, and the nut is partially exposed to the outside, which greatly increases the risk of collision. If the adjusting screw is bent and deformed after a collision, it will become impossible to turn it, and thus lose its adjustment function. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an outboard carburetor. The utility model has a structure for protecting the adjusting screw, namely a collar protruding from the outer edge of the adjusting channel, through which the nut of the adjusting screw exposed to the outside is protected to prevent the nut from being bent by collision and to increase the service life.
[0005] The technical solution adopted by the utility model is as follows: an outboard motor carburetor, comprising a carburetor body and an adjusting screw, wherein an air intake passage and a fuel passage connected to the air intake passage are arranged inside the carburetor body, the fuel passage is connected to an adjusting passage extending to the outside of the carburetor body, the adjusting screw comprises an adjusting section, a threaded section and a nut connected in sequence, an adjusting hole is connected between the air intake passage and the fuel passage, the air intake passage and the fuel passage are blocked when the adjusting section is in sealing cooperation with the adjusting hole, the adjusting screw is threadedly connected to the adjusting passage through the threaded section, the outer edge protrusion of the carburetor body corresponding to the adjusting passage is provided with a collar surrounding the nut, and the nut is located inside the collar when the adjusting screw is threadedly connected to the adjusting passage.
[0006] The inner wall of the sleeve ring is provided with a boss.
[0007] The inner wall of the adjustment channel is provided with an internal thread matched with the threaded section, and the outer sleeve of the adjustment screw is provided with a spring, and the spring abuts between the nut and the internal thread.
[0008] The adjusting section is arranged in a conical shape, and the diameter of one end of the adjusting section away from the threaded section is smaller than the diameter of one end of the adjusting section close to the threaded section.
[0009] The carburetor body is also connected to an oil cup, and a fuel chamber is formed between the oil cup and the carburetor body. The carburetor body is provided with two positioning columns and a float hinged to the two positioning columns through a pin shaft at the position corresponding to the fuel chamber. The pin shaft simultaneously passes through the two positioning columns and is rotatably connected to the two positioning columns.
[0010] The fuel chamber is connected to a refueling channel, in which a float valve is arranged. The float valve is connected to a float through a connecting piece. When the float rotates, the float valve moves along the refueling channel. When the end of the float away from the pin shaft rotates to approach the carburetor body, the float valve and the refueling channel are sealed and matched.
[0011] The inner wall of the oil cup is recessed with a limiting groove for two positioning columns to extend into, and the inner walls on both sides of the limiting groove form a limiting fit with the two ends of the pin shaft.
[0012] The beneficial effects of the utility model are as follows: the utility model has a structure for protecting the adjusting screw, that is, a collar protruding from the outer edge of the adjusting channel, through which the nut of the adjusting screw exposed to the outside is protected to prevent the nut from being bent by collision, thereby ensuring that the adjusting screw can be adjusted normally and extending the service life of the carburetor. Because the adjusting screw needs to be turned frequently to adjust the flow rate, the collar can also guide the adjusting screw, making it easier to turn the adjusting screw, and a plug can be added above the nut in the collar to achieve an anti-tampering function. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.
[0014] Figure 1 This is a structural schematic diagram of an outboard engine carburetor of the utility model;
[0015] Figure 2 It is a cross-sectional schematic diagram of the utility model;
[0016] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;
[0017] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle;
[0018] Figure 5 This is a schematic diagram of the structure of the utility model without the oil cup;
[0019] Figure 6 This is a schematic diagram of the structure of the oil cup of the utility model;
[0020] In the figure, 1-carburetor body, 2-adjusting screw, 3-intake channel, 4-fuel channel, 5-adjusting channel, 6-adjusting section, 7-threaded section, 8-nut, 9-adjusting hole, 10-ring, 11-boss, 12-spring, 13-oil cup, 14-fuel chamber, 15-positioning column, 16-pin shaft, 17-float, 18-fueling channel, 19-float valve, 20-connecting piece, 21-limiting groove. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.
[0022] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.
[0023] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.
[0024] like Figures 1 to 6 As shown, an embodiment of the utility model is an outboard carburetor, comprising a carburetor body 1 and an adjusting screw 2, wherein an air intake passage 3 and a fuel passage 4 connected to the air intake passage 3 are provided inside the carburetor body 1, wherein the fuel passage 4 is connected to an adjusting passage 5 extending to the outside of the carburetor body 1, wherein the adjusting screw 2 comprises an adjusting section 6, a threaded section 7 and a nut 8 connected in sequence, wherein an adjusting hole 9 is connected between the air intake passage 3 and the fuel passage 4, wherein the air intake passage 3 and the fuel passage 4 are blocked when the adjusting section 6 is in sealing cooperation with the adjusting hole 9, wherein the adjusting screw 2 is threadedly connected to the adjusting passage 5 via the threaded section 7, wherein the outer edge protrusion of the carburetor body 1 corresponding to the adjusting passage 5 is provided with a collar 10 surrounding the nut 8, wherein the nut 8 is located inside the collar 10 when the adjusting screw 2 is threadedly connected to the adjusting passage 5.
[0025] The beneficial effects of such a configuration are as follows: the utility model has a structure for protecting the adjusting screw, i.e., a raised collar on the outer edge of the adjusting channel, through which the nut of the adjusting screw exposed to the outside is protected to prevent the nut from being bent by collision, thereby ensuring that the adjusting screw can be normally adjusted and extending the service life of the carburetor. Because the adjusting screw needs to be frequently turned to adjust the flow rate, the collar can also guide the adjusting screw, making it easier for a screwdriver to reach in and turn the adjusting screw for easy adjustment. A plug can also be added above the nut in the collar to achieve an anti-tampering function.
[0026] It is further provided that a boss 11 is provided on the inner wall of the collar 10 .
[0027] The beneficial effects of such a configuration are as follows: the diameter of the inner edge of the outer end of the collar is increased by the boss, and the adjusting screw is guided to be installed into the adjusting channel, thereby improving assembly efficiency.
[0028] It is further provided that the inner wall of the adjustment channel 5 is provided with an internal thread matched with the threaded section 7, and the outer sleeve of the adjustment screw 2 is provided with a spring 12, and the spring 12 abuts between the nut 8 and the internal thread.
[0029] The beneficial effect of such a configuration is as follows: the adjusting screw can improve the stability of the assembly and increase the connection strength through the spring of the outer sleeve.
[0030] It is further provided that the adjusting section 6 is provided in a conical shape, and a diameter of an end of the adjusting section 6 away from the threaded section 7 is smaller than a diameter of an end of the adjusting section 6 close to the threaded section 7 .
[0031] The beneficial effect of such arrangement is as follows: the flow rate passing through is controlled by the adjusting section and the extending into or out of the adjusting hole, and the conical structure of the adjusting section makes it easier to control the flow rate.
[0032] It is further configured that the carburetor body 1 is also connected to an oil cup 13, and a fuel chamber 14 is formed between the oil cup 13 and the carburetor body 1. The carburetor body 1 is provided with two positioning columns 15 and a float 17 hinged to the two positioning columns 15 through a pin shaft 16 at the position corresponding to the fuel chamber 14. The pin shaft 16 simultaneously penetrates the two positioning columns 15 and is rotatably connected to the two positioning columns 15.
[0033] The beneficial effects of such a configuration are as follows: the pin directly passes through the sides of the two positioning columns, and the float is hinged between the two positioning columns through the pin, eliminating the need for fasteners such as screws to limit and install the pin, simplifying and optimizing the structure, greatly saving costs, and improving assembly efficiency.
[0034] It is further configured that the fuel chamber 14 is connected to a refueling channel 18, a float valve 19 is provided in the refueling channel 18, the float valve 19 is connected to the float 17 through a connecting piece 20, when the float 17 rotates, the float valve 19 moves along the refueling channel 18, when the end of the float 17 away from the pin 16 rotates to approach the carburetor body 1, the float valve 19 and the refueling channel 18 are sealed and matched.
[0035] The beneficial effects of such a configuration are as follows: the float valve moves with the rotation of the float. When the amount of oil in the fuel chamber is insufficient, the float rotates around the pin shaft and drives the float valve to move through the connecting piece, and the refueling channel is opened to refuel the fuel chamber. When the amount of oil is sufficient, the float floats up and drives the float valve to move together, and the refueling channel is closed to stop refueling.
[0036] It is further provided that the inner wall of the oil cup 13 is recessed with a limiting groove 21 for the two positioning columns 15 to extend into, and the inner walls on both sides of the limiting groove 21 form a limiting fit with the two ends of the pin shaft 16 .
[0037] The beneficial effect of such arrangement is as follows: the pin is limited by the limiting groove to prevent the pin from falling off from the side of the positioning column, thereby ensuring the normal operation of the carburetor.
[0038] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. An outboard engine carburetor, comprising a carburetor body (1) and an adjusting screw (2), wherein the carburetor body (1) is provided with an air intake passage (3) and a fuel passage (4) connected to the air intake passage (3), wherein: The fuel channel (4) is connected to an adjustment channel (5) extending to the outside of the carburetor body (1); the adjustment screw (2) comprises an adjustment section (6), a threaded section (7) and a nut (8) connected in sequence; an adjustment hole (9) is connected between the air intake channel (3) and the fuel channel (4); when the adjustment section (6) and the adjustment hole (9) are in sealing cooperation, the air intake channel (3) and the fuel channel (4) are blocked; the adjustment screw (2) is threadedly connected to the adjustment channel (5) through the threaded section (7); the outer edge of the carburetor body (1) corresponding to the adjustment channel (5) is protruded with a collar (10) surrounding the nut (8); when the adjustment screw (2) is threadedly connected to the adjustment channel (5), the nut (8) is located inside the collar (10).
2. The outboard engine carburetor according to claim 1, characterized in that: The inner wall of the collar (10) is provided with a boss (11).
3. The outboard engine carburetor according to claim 1, characterized in that: The inner wall of the adjustment channel (5) is provided with an internal thread matched with the threaded section (7); the outer sleeve of the adjustment screw (2) is provided with a spring (12), and the spring (12) abuts between the nut (8) and the internal thread.
4. The outboard engine carburetor according to claim 1, characterized in that: The adjusting section (6) is arranged in a conical shape, and the diameter of one end of the adjusting section (6) away from the threaded section (7) is smaller than the diameter of one end close to the threaded section (7).
5. The outboard engine carburetor according to claim 1, characterized in that: The carburetor body (1) is also connected to an oil cup (13), a fuel chamber (14) is formed between the oil cup (13) and the carburetor body (1), and the carburetor body (1) is provided with two positioning columns (15) and a float (17) hingedly connected to the two positioning columns (15) via a pin shaft (16) at positions corresponding to the fuel chamber (14), wherein the pin shaft (16) simultaneously passes through the two positioning columns (15) and is rotatably connected to the two positioning columns (15).
6. The outboard engine carburetor according to claim 5, characterized in that: The fuel chamber (14) is connected to a fuel filling passage (18), and a float valve (19) is arranged in the fuel filling passage (18). The float valve (19) is connected to the float (17) through a connecting piece (20). When the float (17) rotates, the float valve (19) moves along the fuel filling passage (18). When the end of the float (17) away from the pin shaft (16) rotates to approach the carburetor body (1), the float valve (19) and the fuel filling passage (18) are sealed and matched.
7. The outboard engine carburetor according to claim 5, characterized in that: The inner wall of the oil cup (13) is recessed with a limiting groove (21) for two positioning columns (15) to extend into, and the inner walls on both sides of the limiting groove (21) form a limiting fit with the two ends of the pin shaft (16).