Liquid level control valve

Abstract

The utility model relates to the technical field of automobile parts, in particular to a liquid level control valve which comprises a liquid level control valve body, a plastic positioning piece and a shell which are mutually inserted and fixed are arranged on the liquid level control valve body, a floater is installed in the plastic positioning piece, a floater upper seat is arranged above the floater, and a floater lower seat is arranged above the floater. The upper end of the floater is fixedly connected with a lower sealing gasket in contact with the floater upper base in a clamped mode, the floater upper base is sleeved with an upper sealing gasket in contact fit with the plastic positioning piece, elastic buffering pieces integrally formed in an injection molding mode are evenly arranged at the bottom of the floater at intervals, and elastic supporting bases are arranged at the bottoms of the elastic buffering pieces. And the elastic supporting seat is in contact fit with the shell. According to the liquid level control valve, under the condition that the existing mature structural design is not changed, only the structure of the floater is optimized, the performance of a product is not affected, meanwhile, the manufacturing cost is not affected, the bottom of the floater is integrally injected to form the elastic buffering piece, and the purposes of buffering and noise reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a liquid level control valve. Background Art

[0002] The liquid level control valve is used to control the height of the refueling liquid level in the fuel tank. It is an important part of the automobile fuel system. It is mainly used to detect the fuel level and automatically cut off the fuel flow when the fuel tank is full to prevent fuel overflow. For example, a refueling stop valve and a vehicle disclosed in publication number CN214404706U, the refueling stop valve has both a cut-off function and a venting function through a valve core component and a first through hole and a second through hole located on the side wall of the shell.

[0003] There are more and more hybrid vehicles on the market. When hybrid vehicles are working in pure electric mode, the valve in the fuel tank will bounce up and down due to the bumpy driving of the car, causing knocking noise and affecting the passengers' riding experience. Therefore, more and more OEMs require the liquid level control valve in the fuel tank to have a low-noise design. The noise reduction structure of traditional valves is usually to design an elastic structure on the bottom cover of the valve or to install a buffer pad in the shell. However, the elastic structure on the bottom cover makes the product structure complicated, and installing a buffer pad in the shell will cause installation difficulties. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid level control valve to solve the problem raised in the above background technology that when hybrid vehicles on the market are working in pure electric mode, the valve in the fuel tank will bounce up and down due to the bumpy driving of the vehicle, causing knocking noise, which affects the riding experience of passengers. The noise reduction structure of the current liquid level control valve has the problems of complex structure and difficult installation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid level control valve, including a liquid level control valve body, the liquid level control valve body is provided with a plastic positioning piece and a shell that are plugged and fixed to each other, and a float is installed in the plastic positioning piece, a float upper seat is provided above the float, and an integral injection-molded elastic buffer is evenly spaced at the bottom of the float, and an elastic support seat is provided at the bottom of the elastic buffer, an inwardly protruding fixing column is integrally provided at the bottom of the shell, and a spring is sleeved on the fixing column, and the spring is clamped on the inner side of the float, and the elastic support seat is in contact with the shell, so that the float is buffered and noise-reduced by the elastic buffer.

[0006] Preferably, a lower sealing gasket contacting with the upper seat of the float is clamped and fixed on the upper end of the float, and an upper sealing gasket contacting with the plastic positioning piece is sleeved on the upper seat of the float.

[0007] Preferably, at least three snap-fit ​​connectors with strip-shaped through holes are evenly spaced and integrally provided on the side surface of the float upper seat, and the snap-fit ​​connectors are movably snap-fitted with the float in the axial direction.

[0008] Preferably, a positioning protrusion of an integral structure is provided above the side surface of the float, and the positioning protrusion is snap-connected with the snap-connecting piece.

[0009] Preferably, three elastic buffers are provided, and the elastic support seat and the elastic buffer are an integral structure, and the angle between the elastic support seat and the elastic buffer is an obtuse angle structure.

[0010] Preferably, the upper part, the inner side surface and one end of the elastic buffer are all arranged with a gap from the float, and the float is provided with a limiting support surface at a position above the elastic buffer.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the liquid level control valve only optimizes the float structure without changing the existing mature structural design, so that the product performance is not affected, and the manufacturing cost is not affected, and the bottom of the float is integrally injection molded to form an elastic buffer to achieve the purpose of buffering and noise reduction. The liquid level control valve evenly distributes the elastic buffer at the bottom of the float, so that there is a buffer gap between the top of the elastic buffer and the float, and the elastic buffer is limited and supported by the float to prevent the elastic buffer from breaking or deforming too much, thereby avoiding the elastic buffer from failing due to durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the internal structure of a liquid level control valve of the utility model;

[0013] Figure 2 This is a schematic diagram of the external structure of a liquid level control valve of the utility model;

[0014] Figure 3 This is a top view of a liquid level control valve of the utility model;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of a float of a liquid level control valve of the utility model;

[0016] Figure 5 This is a side view structural diagram of a float of a liquid level control valve of the utility model;

[0017] Figure 6 The utility model is a schematic diagram of the bottom structure of a float of a liquid level control valve.

[0018] In the figure: 1. Liquid level control valve body; 2. Plastic positioning part; 3. Shell; 4. Float upper seat; 401. Snap-fit ​​connector; 5. Float; 501. Positioning protrusion; 502. Limiting support surface; 503. Elastic buffer; 504. Elastic support seat; 6. Upper sealing gasket; 7. Lower sealing gasket; 8. Spring; 9. Fixed column. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-6The utility model provides a technical solution: a liquid level control valve, including a liquid level control valve body 1, on which a plastic positioning member 2 and a shell 3 that are plugged and fixed to each other are provided, and a fixing column 9 that protrudes inward is integrally provided at the bottom of the shell 3, and a spring 8 is sleeved on the fixing column 9, and the spring 8 is clamped on the inner side of the float 5. This structure spring 8 is a structure in the existing liquid level control valve. When the float 5 jumps up and down under the elastic force of the spring 8 and the bumps of the car, the float 5 is buffered and noise-reduced above through the contact between the upper sealing gasket 6 and the plastic positioning member 2, and the bottom of the float 5 is in contact with the shell 3 through the elastic support seat 504, and the elastic buffer 503 is elastically active relative to the float 5 to perform buffering and noise reduction, avoiding To prevent the float 5 from knocking on the shell 3 and generating a loud noise when it falls, the plastic positioning member 2 is installed with the float 5, and a float upper seat 4 is provided above the float 5. At least three snap-fit ​​connectors 401 with strip-shaped through holes are evenly spaced and integrated on the side of the float upper seat 4, and the snap-fit ​​connector 401 is movably snap-fitted with the float 5 in the axial direction. This structure makes the float upper seat 4 relatively fixed to the float 5, and at the same time, the float upper seat 4 and the float 5 can move up and down, and a lower sealing gasket 7 contacting with the float upper seat 4 is snap-fitted and fixed on the upper end of the float 5, and an upper sealing gasket 6 contacting with the plastic positioning member 2 is sleeved on the float upper seat 4, and a positioning protrusion 501 of an integrated structure is provided above the side of the float 5, and the positioning protrusion 501 is snap-fitted with the float 5. The snap-fit ​​connector 401 is snap-fitted, and this structure allows the float upper seat 4 and the float 5 to be connected and fixed through the positioning protrusion 501 and the snap-fit ​​connector 401. The bottom of the float 5 is evenly spaced with an integrally injection-molded elastic buffer 503, and the bottom of the elastic buffer 503 is provided with an elastic support seat 504, and the elastic support seat 504 is in contact with the shell 3, so that the float 5 can be moved up and down through the upper sealing gasket 6 and the elastic buffer 503 to perform buffering and noise reduction. There are three elastic buffers 503, and the elastic support seat 504 and the elastic buffer 503 are an integral structure, and the angle between the elastic support seat 504 and the elastic buffer 503 is an obtuse structure. This structure allows the elastic support seat 50 4 and the elastic buffer 503 are more firmly connected, ensuring the structural strength of the elastic support seat 504 relative to the elastic buffer 503, so that the elastic support seat 504 can be elastically buffered by the elastic buffer 503 after contacting the shell 3. The elastic support seat 504 is evenly arranged and has a stable supporting effect. The upper part, the inner side and one end of the elastic buffer 503 are all arranged with gaps from the float 5, and the float 5 is provided with a limiting support surface 502 at the upper part of the elastic buffer 503. This structure can limit the activity distance through the limiting support surface 502 when the elastic buffer 503 is elastically active, so as to avoid the elastic buffer 503 from being broken due to a large deformation, and prevent the elastic buffer 503 from failing.

[0021] Working principle: when using the liquid level control valve, first, when the liquid level control valve body 1 is in use, the vehicle bumps and the elasticity of the spring 8 cause the float 5 to bounce up and down, the float 5 contacts the plastic positioning member 2 through the upper sealing pad 6 fixed on the float upper seat 4, which plays a role of upper buffering and noise reduction, and the fixing column 9 plays a positioning role for the spring 8. The clamping connection between the clamping connector 401 and the positioning protrusion 501 realizes the fixation of the float upper seat 4 and the float 5, and the lower sealing pad 7 is fixed between the float upper seat 4 and the float 5. When the float 5 falls, it contacts the shell 3 through the elastic support seat 504. After the elastic support seat 504 is subjected to force, the elastic buffer 503 is elastically active, and the limiting support surface 502 limits the elastic buffer 503 to prevent the elastic buffer 503 from excessive deformation and failure, thereby completing a series of work.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid level control valve, comprising a liquid level control valve body (1), characterized in that: The liquid level control valve body (1) is provided with a plastic positioning member (2) and a shell (3) which are plugged and fixed to each other, and a float (5) is installed in the plastic positioning member (2), a float upper seat (4) is provided above the float (5), the bottom of the float (5) is evenly spaced with integrally injection-molded elastic buffer members (503), and the bottom of the elastic buffer member (503) is provided with an elastic support seat (504), the bottom of the shell (3) is integrally provided with an inwardly protruding fixed column (9), and a spring (8) is sleeved on the fixed column (9), and the spring (8) is clamped on the inner side of the float (5), and the elastic support seat (504) is in contact with the shell (3), so that the float (5) is buffered and noise-reduced through the elastic buffer member (503).

2. A liquid level control valve according to claim 1, characterized in that: The upper end of the float (5) is clamped and fixed with a lower sealing gasket (7) arranged in contact with the float upper seat (4), and the upper seat (4) of the float is sleeved with an upper sealing gasket (6) in contact with the plastic positioning piece (2).

3. A liquid level control valve according to claim 1, characterized in that: At least three snap-fit ​​connectors (401) with strip-shaped through holes are evenly spaced and integrally provided on the side surface of the float upper seat (4), and the snap-fit ​​connectors (401) are movably snap-fitted with the float (5) in the axial direction.

4. A liquid level control valve according to claim 3, characterized in that: A positioning protrusion (501) of an integral structure is provided above the side surface of the float (5), and the positioning protrusion (501) is clamped with the clamping connector (401).

5. A liquid level control valve according to claim 1, characterized in that: The elastic buffer components (503) are provided with three, and the elastic support seat (504) and the elastic buffer component (503) are an integrated structure, and the angle between the elastic support seat (504) and the elastic buffer component (503) is an obtuse angle structure.

6. A liquid level control valve according to claim 1, characterized in that: The upper part, the inner side surface and one end of the elastic buffer (503) are all provided with a gap with the float (5), and the float (5) is provided with a limiting support surface (502) at the upper part of the elastic buffer (503).

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