CN212615077U

CN212615077U - Carburetor capable of preventing fuel oil from overflowing

Info

Publication number: CN212615077U
Application number: CN202021872943.0U
Authority: CN
Inventors: 程学明; 许明坤; 王成; 何鑫; 秦明亮
Original assignee: Zhejiang Yinlong Vehicle Parts Co ltd
Current assignee: Zhejiang Yinlong Vehicle Parts Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-02-26
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses a prevent carburetor that fuel spills over, including the carburetor body, be equipped with float chamber, choke in the carburetor body, the fuel has been annotated to the inherent operating condition of float chamber, and the fuel of float chamber gets into through the major metering hole in the choke, the indoor float that is equipped with of float, the inner wall of float chamber is equipped with the inlet port, the inlet port is sealed by the needle valve, the needle valve activity sets up, needle valve and float adopt the components of a whole that can function independently to set up, be equipped with the link gear between float and the needle valve; when the float chamber is at a normal oil level or a high oil level, the action of the float does not influence the action of the needle valve through the linkage mechanism, and when the float chamber is at a low oil level, the action of the float influences the action of the needle valve through the linkage mechanism. Therefore, the technical effect of reliable and stable oil inlet is achieved, and the purpose of preventing fuel oil from overflowing is achieved.

Description

Carburetor capable of preventing fuel oil from overflowing

Technical Field

The utility model relates to a carburetor, concretely relates to prevent carburetor of fuel oil overflow.

Background

A conventional carburetor is shown in FIG. 1, and comprises a carburetor body 101, a float chamber 102 is provided in the carburetor body, the float chamber 102 is filled with fuel, the fuel in the float chamber 102 enters a throat of the carburetor through a main metering hole, a float 103 is provided in the float chamber 102, a needle valve 104 is provided on the float 103, an oil inlet 105 is provided on an inner wall of the float chamber, the oil inlet 105 is communicated with the float chamber 102, the needle valve 104 is connected to the float 103, a valve port ring 106 is provided in the oil inlet 105 to be fitted with a tip portion of the needle valve 104, the tip portion of the needle valve 104 is conical, the conical shape is abutted into an inner hole of the valve port ring 106 and can block the oil inlet 105, the needle valve can block the valve port ring 104 under the buoyancy of the float 103 to close the oil inlet 105, the float 103 drives the needle valve 104 to open the oil inlet 105 along with the fuel level after the fuel in the float chamber 102 is consumed and drops, the fuel can rapidly enter the float chamber under the negative, so that the fuel flows into the float chamber again to keep the fuel in a sufficient state in the float chamber at all times.

During the idling operation of the engine, most engines can shake to a certain degree, the float in the carburetor shakes with a certain amplitude in the shaking process, and then the needle valve shakes along with the float, so that the oil inlet hole of the needle valve can be in a discontinuous opening state in the shaking process, excessive fuel oil enters the float chamber, the fuel oil in the float chamber overflows out of the main metering orifice to flow into the throat of the oil carburetor and enter the engine, the running of the engine is unstable, and even the engine is flamed out.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a reliable and stable carburetor capable of preventing fuel oil from overflowing.

In order to achieve the above purpose, the utility model provides a following technical scheme: a carburetor capable of preventing fuel from overflowing comprises a carburetor body, wherein a float chamber and a throat pipe are arranged in the carburetor body, fuel is injected in the float chamber in a working state, the fuel in the float chamber enters the throat pipe through a main metering hole, a float is arranged in the float chamber, an oil inlet hole is formed in the inner wall of the float chamber, the oil inlet hole is blocked by a needle valve, the needle valve is movably arranged, the needle valve and the float are arranged in a split mode, and a linkage mechanism is arranged between the float and the needle valve; when the float chamber is at a normal oil level or a high oil level, the action of the float does not influence the action of the needle valve through the linkage mechanism, and when the float chamber is at a low oil level, the action of the float influences the action of the needle valve through the linkage mechanism.

The float pushes the linkage mechanism to influence the action of the needle valve by means of weight.

The oil inlet is arranged below the floater, the linkage mechanism comprises a swinging piece arranged in the floating chamber, one end of the swinging piece is connected with the needle valve, the other end of the swinging piece faces the floater, and the swinging piece is reset through the elastic piece after acting; when there is no contact with the float, the elastic member pushes the oscillating member to cause the needle valve to close the oil inlet hole.

The float is indoor to be equipped with the pivot, swing rotates to be installed in the pivot, swing with the pivot forms the longer power arm of one side length and the shorter resistance arm of opposite side length for the demarcation point, resistance arm with the needle valve is connected, the power arm bottom surface with the up end looks butt of elastic component.

The oil inlet is vertical, a mounting seat is arranged at the position, close to the oil inlet, of the float chamber, a limiting groove matched with the elastic piece is formed in the end face of the mounting seat, the lower portion of the elastic piece is arranged in the limiting groove, and the upper end of the elastic piece is in contact with the bottom surface of the swinging piece.

The elastic piece is a spring.

And a positioning lug boss is arranged on the bottom surface of the swinging piece and is abutted into the upper port of the spring.

The end of the power arm is provided with an adjusting part which is bent upwards.

The oil inlet hole is arranged above the floater, the linkage mechanism is a flexible traction rope, the upper end of the flexible traction rope is connected with the needle valve, the lower end of the flexible traction rope is connected with the floater, and the bottom of the needle valve is provided with a spring; when the floater does not tension the flexible traction rope, the spring pushes the needle valve to close the oil inlet hole.

The utility model discloses a structure, because the needle valve passes through shutoff inlet port under the elastic component effect for the engine is in the vibration, the inlet port can not be opened in easy removal to the needle valve, the float chamber is when normal oil level or high oil level, the action of float does not influence the action of needle valve through the link gear, the float chamber is when low oil level, the action of float passes through the action that the link gear influences the needle valve, so just realized the reliable stable technological effect of oil feed, thereby reach the purpose that prevents the fuel and spill over.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a view showing an internal structure of a conventional carburetor of the prior art;

FIG. 2 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2;

fig. 4 is a schematic structural diagram of a second embodiment of the present invention;

fig. 5 is an enlarged view of B in fig. 4.

Detailed Description

The present invention will be described in detail with reference to two embodiments.

The utility model discloses a concrete embodiment one: as shown in figures 2 and 3, the carburetor capable of preventing fuel oil from overflowing comprises a carburetor body 1, a float chamber 2 is arranged in the carburetor body 1, fuel oil is filled in the float chamber 2 in a working state, the fuel oil in the float chamber 2 enters a throat through a main metering hole, a float 3 is arranged in the float chamber 2, an oil inlet 4 is arranged on the inner wall of the float chamber 2, a needle valve 5 and a valve port ring 6 are arranged in the oil inlet 4, the tip of the needle valve 5 can seal the valve port ring 6, namely the oil inlet 4 is sealed by the needle valve 5, the needle valve is movably arranged, the needle valve 5 and the float 3 are separately arranged, a linkage mechanism 8 is arranged between the float 3 and the needle valve 5, the linkage mechanism 8 comprises an elastic member 7, the needle valve 5 seals the valve port ring 6 under the elastic action of the elastic member 7, when the float chamber 2 is at a normal oil level or a high oil level, the action of the float 3 does not influence the action of the needle valve, when the float chamber 2 is at a low oil level, the action of the float 3 influences the action of the needle valve 5 through the linkage 8, wherein the float 3 pushes the linkage 8 by weight to influence the action of the needle valve 5.

The oil inlet 4 is arranged at the lower position of the floater 3, the linkage mechanism 8 comprises a swinging piece 82 arranged in the floating chamber, one end of the swinging piece 82 is connected with the needle valve 5, the other end of the swinging piece 82 faces the bottom surface of the floater 3, and the swinging piece 82 is reset through an elastic piece 7 after acting; when the needle valve is not in contact with the float 3, the elastic piece 7 pushes the swinging piece 82 to close the needle valve to feed oil 4, the linkage mechanism 8 further comprises a rotating shaft arranged in the float chamber 2, the swinging piece 82 is rotatably arranged on the rotating shaft 81, the swinging piece 82 forms a power arm 821 with a longer length on one side and a resistance arm 822 with a shorter length on the other side by taking the rotating shaft 81 as a dividing point, the resistance arm 822 is connected with the needle valve 5, the bottom surface of the power arm 821 is abutted against the upper end surface of the elastic piece 7, and the end part of the power arm 821 is close to or abutted against the bottom surface of the float 3. Through the structure, the elastic part 7 acts on the power arm 821 of the swinging part 82 to press the resistance arm 822 on the other side downwards to abut against the needle valve 5, the needle valve 5 is prevented from displacing to open the oil inlet hole 4, after fuel consumption of the float chamber 2 is reduced, the float 3 overcomes the elastic force of the elastic part 7 with dead weight along with the downward displacement of the fuel liquid level and presses the power arm 821 downwards, so that the end of the resistance arm 822 connected with the needle valve 5 is tilted to open the oil inlet hole 4, fuel enters the float chamber 2 under negative pressure, the fuel liquid level is restored to a sufficient initial state, at the moment, the float 3 moves upwards along with the rise of the liquid level to enable the end of the power arm 821, and the resistance arm 822 enters the oil inlet hole 4 under the elastic force of the elastic part 7.

The oil inlet 4 is vertical, the mounting seat 9 is arranged at the position of the float chamber 2 close to the oil inlet 4, the end face of the mounting seat 9 is provided with a limit groove 91 matched with the elastic part 7, the lower part of the elastic part 7 is arranged in the limit groove 91, and the upper end of the elastic part 7 is contacted with the bottom surface of the swinging part 82. Such a structure makes the positioning of the elastic member 7 more reliable, and improves the reliability of the structure.

The elastic member 7 is a spring 7, but a rubber member having elasticity may be used. Especially, the size and length of the spring 70 have larger selectivity, so that the material can be obtained more conveniently and the debugging is convenient.

The bottom surface of the swinging member 82 is provided with a positioning projection 820, and the positioning projection 820 abuts into the upper port of the spring 7. The positioning structure of the spring 7 can be further improved through the structure, and the working stability is ensured.

An adjusting part 8211 bent upwards is arranged at the end part of the power arm 821. The force point of the power arm 821 can be adjusted by the adjusting part 8211, so that the force is more reliable and stable.

By adopting the technical scheme, the needle valve 5 blocks the valve port ring 6 under the action of the elastic piece 7, so that the needle valve 5 cannot easily move to separate from the valve port ring 6 to open the oil inlet hole 4 in the vibration of the engine, and the linkage mechanism 8 can be pushed to overcome the elastic force of the elastic piece 7 to drive the needle valve 5 to move to open the oil inlet hole 4 when the floater 3 moves downwards under the self weight due to the fuel consumption in the floater chamber 2, so that the technical effect of reliable and stable oil inlet is realized, and the aim of preventing the fuel from overflowing is fulfilled.

The utility model discloses a specific embodiment two: as shown in fig. 4 and 5, the second embodiment is different from the first embodiment in that: the oil inlet 4 is arranged above the floater 3, the oil inlet is vertical, the linkage mechanism 8 is a flexible traction rope 80, the upper end of the flexible traction rope 80 is connected with the needle valve 5, the lower end of the flexible traction rope is connected with the floater 3, and the bottom of the needle valve 5 is provided with a spring 7; when the float 3 is not pulling the flexible hauling cable, the spring pushes the needle valve to close the oil inlet, wherein a retainer ring is also provided, one end of the spring is abutted on a retainer ring 10 which is connected with the inner wall of the float chamber 2, and the hauling cable 80 passes through the central hole of the spring 70. Because the needle valve blocks the oil inlet hole under the action of the spring, the needle valve cannot easily move to open the oil inlet hole in vibration of the engine, the floater sinks after fuel consumption is reduced, the needle valve is pulled and overcomes the elastic force of the spring through the traction rope 80 through the self weight of the needle valve, the needle valve is separated from the valve opening ring to open the oil inlet hole, meanwhile, under the action of the spring, the vibration of the engine cannot cause displacement of the needle valve, oil is prevented from being fed when fuel is sufficient, and therefore the purpose of preventing fuel from overflowing is achieved.

Finally, in both the first and second embodiments, since the needle valve 5 is driven to open the oil inlet 4 against the elastic force of the elastic member 7, the float 3 is preferably made of metal or a weight is disposed on the float 3 made of plastic to increase its weight properly.

Claims

1. A carburetor capable of preventing fuel from overflowing comprises a carburetor body, wherein a float chamber and a throat pipe are arranged in the carburetor body, fuel is injected in the float chamber in a working state, the fuel in the float chamber enters the throat pipe through a main metering orifice, a float is arranged in the float chamber, an oil inlet hole is formed in the inner wall of the float chamber, the oil inlet hole is blocked by a needle valve, and the needle valve is movably arranged, and the carburetor is characterized in that: the needle valve and the floater are arranged in a split manner, and a linkage mechanism is arranged between the floater and the needle valve; when the float chamber is at a normal oil level or a high oil level, the action of the float does not influence the action of the needle valve through the linkage mechanism, and when the float chamber is at a low oil level, the action of the float influences the action of the needle valve through the linkage mechanism.

2. A fuel spill resistant carburetor according to claim 1, wherein: the float pushes the linkage mechanism to influence the action of the needle valve by means of weight.

3. A fuel spill resistant carburetor according to claim 2, wherein: the oil inlet is arranged below the floater, the linkage mechanism comprises a swinging piece arranged in the floating chamber, one end of the swinging piece is connected with the needle valve, the other end of the swinging piece faces the floater, and the swinging piece is reset through the elastic piece after acting; when there is no contact with the float, the elastic member pushes the oscillating member to cause the needle valve to close the oil inlet hole.

4. A fuel spill resistant carburetor according to claim 3, wherein: the float is indoor to be equipped with the pivot, swing rotates to be installed in the pivot, swing with the pivot forms the longer power arm of one side length and the shorter resistance arm of opposite side length for the demarcation point, resistance arm with the needle valve is connected, the power arm bottom surface with the up end looks butt of elastic component.

5. A fuel spill resistant carburetor according to claim 3, wherein: the oil inlet is vertical, a mounting seat is arranged at the position, close to the oil inlet, of the float chamber, a limiting groove matched with the elastic piece is formed in the end face of the mounting seat, the lower portion of the elastic piece is arranged in the limiting groove, and the upper end of the elastic piece is in contact with the bottom surface of the swinging piece.

6. A fuel overflow preventing carburetor according to any one of claims 3-5, characterized in that: the elastic piece is a spring.

7. A fuel spill resistant carburetor according to claim 4, wherein: the end of the power arm is provided with an adjusting part which is bent upwards.

8. A fuel spill resistant carburetor according to claim 2, wherein: the oil inlet hole is arranged above the floater, the linkage mechanism is a flexible traction rope, the upper end of the flexible traction rope is connected with the needle valve, the lower end of the flexible traction rope is connected with the floater, and the bottom of the needle valve is provided with a spring; when the floater does not tension the flexible traction rope, the spring pushes the needle valve to close the oil inlet hole.