Anti-tipping carburetor

Abstract

This utility model discloses an anti-tipping and leak-proof carburetor, belonging to the field of carburetor technology. It includes a carburetor body with a throat and a main airflow orifice, and a float chamber at the lower end. The carburetor body has a specially structured balance orifice channel. The balance orifice channel consists of a series of interconnected inclined channel sections, a top channel section, a blocking channel section, and an external horizontal channel section, forming an arc around the throat. The blocking channel section is inclined downwards and has an internal capacity-enhancing groove. The outlet connecting channel is positioned high above the blocking channel section. This utility model abandons the traditional straight-through balance orifice structure, and through a multi-stage, tortuous, and staggered channel structure combined with a capacity-enhancing fuel storage structure, it significantly extends the fuel leakage path. During instantaneous tilting, it can contain and buffer leaking fuel, preventing fuel leakage. This solves the safety hazard of carburetor leakage when the engine of construction machinery or racing vehicles tilts instantaneously, while ensuring air pressure balance in the float chamber and stabilizing the air-fuel mixture concentration. The structure is simple and the leak-proof effect is excellent.

Description

Technical Field

[0001] This utility model belongs to the technical field of internal combustion engine carburetors, specifically relating to an anti-tipping and oil-leaking carburetor suitable for the engines of engineering machinery and racing vehicles. Background Technology

[0002] The carburetor is the core fuel supply device of an internal combustion engine. Its core function is to mix fuel and air in a preset ratio to form a combustible mixture suitable for engine operating conditions, ensuring stable engine operation. A conventional carburetor mainly consists of the carburetor body, choke assembly, throttle body assembly, float chamber, and balance hole. Among these, the balance hole is the core pressure-stabilizing structure. Its function is to connect the float chamber with the outside atmosphere, ensuring that the air pressure inside the float chamber is always balanced with the outside atmospheric pressure. This ensures a stable pressure difference between the inside and outside of the float chamber, allowing fuel to be smoothly drawn out, maintaining a constant air-fuel mixture concentration, and preventing problems such as unstable fuel supply, idling vibration, and insufficient power in the engine.

[0003] Currently, most carburetors use a simple straight-through channel structure for their balance holes, directly creating a vertical or horizontal through-hole above the float chamber to achieve air pressure balance. While this structure is simple and easy to manufacture, and can meet the air pressure balance requirements under normal stable operating conditions, it has significant structural defects and extremely poor adaptability.

[0004] For specialized equipment such as construction machinery and racing vehicles, extreme conditions such as instantaneous tilting, bumping, and tipping frequently occur during operation and travel. When the equipment tilts instantly or significantly, the fuel in the float chamber will rush into the straight-through balance hole due to inertia. Since traditional balance holes have no obstruction, buffer, or fuel storage structure, fuel will quickly leak directly out through the balance hole, causing carburetor leakage problems.

[0005] Carburetor leaks not only waste fuel and cause an imbalance in the air-fuel mixture, leading to engine stalling and power loss, but also pose serious safety hazards. Leaking fuel can easily come into contact with high-temperature engine components, causing fires and explosions, which seriously threaten the safe operation of equipment and the personal safety of operators.

[0006] There is currently no dedicated anti-leakage balance hole structure for instantaneous tilting conditions, which cannot effectively solve the technical problem of carburetor tipping and leakage under extreme conditions. Therefore, there is an urgent need to design a carburetor with optimized structure, good pressure stabilization effect and anti-tilting and leakage function. Utility Model Content

[0007] This utility model aims to overcome the defects of the prior art and solve the technical problem that the existing carburetor with a straight-through balance hole structure is prone to oil leakage under the conditions of instantaneous tilting and tipping of engineering machinery and track vehicles, which poses a great safety hazard, and has poor fuel supply stability under extreme conditions.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a carburetor designed to prevent tipping and fuel leakage, comprising a carburetor body, wherein the carburetor body is provided with a throat and a main air volume orifice, a float chamber is connected to the lower end of the carburetor body, a balance hole channel communicating with the float chamber is opened on the bottom surface of the carburetor body, and a balance hole channel inlet is opened on the inner wall of the float chamber of the carburetor body, the balance hole channel comprising an inclined channel section, a top channel section, a blocking channel section, and an external horizontal channel section with an independent straight-through structure connected in sequence, the balance hole channel inlet communicating with the inclined channel section, the inclined channel section, the top channel section, and the blocking channel section being arranged in an arc around the throat, the blocking channel section being arranged inclined downwards, the inner end of the external horizontal channel section communicating with the blocking channel section through an outlet connecting channel, the inlet of the outlet connecting channel being located at the upper part of the blocking channel section, a pipe joint being connected to the outer end of the external horizontal channel section, the top channel section being arranged through the central axis of the main air volume orifice, and a capacity-enhancing groove for accommodating leaked fuel being opened inside the blocking channel section.

[0009] Furthermore, the inclined channel section extends upward from the inlet of the balance hole channel and smoothly transitions to connect with the top channel section, forming an overall tortuous channel structure with low-level oil inlet and high-level flow guidance.

[0010] Furthermore, the blocking channel section and the outlet connecting channel form a staggered structure, with the inlet height of the outlet connecting channel being higher than the bottom groove height of the blocking channel section.

[0011] Furthermore, the capacity-enhancing groove is a concave groove structure, and the volume of the capacity-enhancing groove is greater than the maximum single leakage fuel volume when the carburetor is momentarily tilted.

[0012] Furthermore, the external horizontal channel section is a horizontal straight-through pipe, and the inner diameter of the pipe is smaller than the inner diameter of the blocking channel section.

[0013] The beneficial effects of this utility model are: 1. This utility model abandons the traditional straight-through balance hole structure and adopts a multi-level tortuous and arc-shaped composite channel structure, which greatly extends the fuel leakage path. During the instantaneous tilting of the carburetor, the fuel cannot pass through the entire balance hole channel in a short time, thus reducing the probability of fuel leakage from the root.

[0014] 2. By setting a capacity-enhancing groove in the blocking channel section, fuel leakage under momentary tilting conditions can be temporarily contained. Combined with the staggered height structure of the outlet connection channel and the blocking channel section, a physical barrier buffer is formed, effectively preventing fuel from leaking out to the external horizontal channel section, resulting in a significant oil leakage prevention effect.

[0015] 3. The top channel section runs through the central axis of the main air volume orifice. In conjunction with the overall channel structure, it can stably achieve air pressure balance between the float chamber and the outside atmosphere, ensuring stable air-fuel mixture concentration under normal operating conditions and slight tilting conditions, without affecting the normal fuel supply performance of the carburetor.

[0016] 4. The overall structure is integrated inside the carburetor body, eliminating the need for additional complex parts. It features a compact structure, convenient processing, and strong adaptability, making it widely compatible with various engineering machinery and racing vehicle engines. This completely solves the safety hazards caused by instantaneous spillage and oil leakage, improving the safety and stability of equipment operation.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 A cross-sectional view of a specific embodiment of this utility model. Figure 1 ; Figure 2 A cross-sectional view of a specific embodiment of this utility model. Figure 2 ; Figure 3 A cross-sectional view of a specific embodiment of this utility model. Figure 3 .

[0019] Explanation of reference numerals in the attached diagram: 1. Carburetor body; 2. Throat; 3. Main air volume orifice; 4. Float chamber; 5. Balance hole channel inlet; 6. Inclined channel section; 7. Top channel section; 8. Blocking channel section; 9. External horizontal channel section; 10. Outlet connection channel; 11. Pipe joint; 12. Capacity expansion slot. Detailed Implementation

[0020] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] like Figure 1 — Figure 3 As shown, this embodiment discloses an anti-tipping and leaking carburetor, including a carburetor body 1. A throat 2 and a main airflow orifice 3 are integrated in the middle of the carburetor body 1. The throat 2 is used to accelerate airflow and create negative pressure to draw in fuel, while the main airflow orifice 3 is used to regulate the intake air volume and match the fuel-air mixture ratio. A float chamber 4 is fixedly connected to the lower end of the carburetor body 1. The float chamber 4 stores fuel, providing fuel reserves for the carburetor's fuel supply. A through structure is provided on the bottom surface of the carburetor body 1, enabling communication between the balance hole channel and the interior of the float chamber 4.

[0022] The carburetor body 1 has a balance hole channel inlet 5 on the inner wall corresponding to the float chamber 4. The balance hole channel inlet 5 serves as the initial port for air pressure exchange and fuel leakage in the float chamber 4. The balance hole channel consists of four functional channels: an inclined channel section 6, a top channel section 7, a blocking channel section 8, and an external horizontal channel section 9. These channels are smoothly connected sequentially, with the external horizontal channel section 9 being an independent straight-through pipe structure. The balance hole channel inlet 5 connects upward to the inclined channel section 6, which extends upward at an incline, smoothly transitioning to the top channel section 7 at its upper end. The top channel section 7 is horizontally arc-shaped and runs through the central axis of the main air volume orifice 3. The end of the top channel section 7 connects to the blocking channel section 8. The inclined channel section 6, top channel section 7, and blocking channel section 8 are arranged in an arc around the outside of the throat pipe 2, maximizing the extension of the channel path without occupying the core working area.

[0023] The blocking channel section 8 is arranged at a downward angle. A channel interface is located at the upper part of the blocking channel section 8, which connects to the inner end of the external horizontal channel section 9 via an outlet connecting channel 10, forming a staggered connection structure. The inlet height of the outlet connecting channel 10 is higher than the bottom of the blocking channel section 8, effectively preventing fuel from overflowing upwards from the bottom. A pipe connector 11 is fixedly installed at the outer end of the external horizontal channel section 9, enabling communication with the outside atmosphere and ensuring pressure balance.

[0024] The inner bottom side of the blocking channel section 8 is provided with a concave capacity-enhancing groove 12. The capacity-enhancing groove 12 is a special tank for oil storage. Its preset volume is larger than the volume of a single fuel leak under the extreme instantaneous tilting condition of the carburetor, which can completely contain the leaked fuel and prevent fuel accumulation and overflow. At the same time, the inner diameter of the pipe of the external horizontal channel section 9 is smaller than the inner diameter of the channel of the blocking channel section 8, forming a narrowing barrier structure, which further improves the oil leakage prevention effect.

[0025] The working principle of this utility model is as follows: Under normal stable operating conditions, the float chamber 4 is connected to the outside atmosphere through the through channel composed of the inclined channel section 6, the top channel section 7, the blocking channel section 8, the outlet connecting channel 10, and the external horizontal channel section 9, ensuring a constant air pressure in the float chamber 4 and stabilizing the fuel supply pressure and air-fuel mixture concentration. When construction machinery or track vehicles tilt or tip over momentarily, if the fuel level in the float chamber 4 is lower than the balance hole channel inlet 5, fuel cannot enter the channel, and there is no risk of fuel leakage. If the fuel level is higher than the balance hole channel inlet 5, a small amount of fuel will seep into the inclined channel section 6 under inertia and flow into the blocking channel section 8. The leaked fuel can be directly collected inside the expansion slot 12. Due to the long overall path and many bends of the channel, and the high-level arrangement of the outlet connecting channel 10 and the narrowing obstruction of the external horizontal channel section 9, fuel cannot reach the external horizontal channel section 9 to leak out during the short period of momentary tilting. After the tilting condition is restored, the collected fuel can flow back to the float chamber 4, completely eliminating the problem of tipping and leakage and eliminating safety hazards.

Claims

1. A carburetor designed to prevent tipping and leaking oil, comprising a carburetor body (1), wherein the carburetor body (1) is provided with a throat (2) and a main air flow port (3), a float chamber (4) is connected to the lower end of the carburetor body (1), and a balance hole channel communicating with the float chamber (4) is provided on the bottom surface of the carburetor body (1), characterized in that, The carburetor body (1) has a balance hole channel inlet (5) on the inner wall of the float chamber (4). The balance hole channel includes an inclined channel section (6), a top channel section (7), a blocking channel section (8), and an external horizontal channel section (9) with an independent straight-through structure connected in sequence. The balance hole channel inlet (5) is connected to the inclined channel section (6). The inclined channel section (6), the top channel section (7), and the blocking channel section (8) are arranged in an arc around the throat (2). The blocking channel section (8) is arranged inclined downward. The inner end of the external horizontal channel section (9) is connected to the blocking channel section (8) through the outlet connection channel (10). The inlet of the outlet connection channel (10) is located at the upper part of the blocking channel section (8). The outer end of the external horizontal channel section (9) is connected to a pipe joint (11). The top channel section (7) is arranged through the central axis of the main air volume hole (3). The blocking channel section (8) has a capacity-enhancing groove (12) for accommodating leaked fuel inside.

2. The anti-tipping and oil-leaking carburetor according to claim 1, characterized in that, The inclined channel section (6) extends upward from the balance hole channel inlet (5) and smoothly transitions to connect with the top channel section (7), forming a tortuous channel structure with low-level oil inlet and high-level flow guidance.

3. The anti-tipping and oil-leaking carburetor according to claim 1, characterized in that, The blocking channel section (8) and the outlet connecting channel (10) form a staggered structure, with the inlet height of the outlet connecting channel (10) being higher than the bottom groove height of the blocking channel section (8).

4. The anti-tipping and oil-leaking carburetor according to claim 1, characterized in that, The expansion slot (12) is a concave slot structure.

5. The anti-tipping and oil-leaking carburetor according to claim 1, characterized in that, The external horizontal channel section (9) is a horizontal straight pipe, and the inner diameter of the pipe is smaller than the inner diameter of the blocking channel section (8).

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