Refueling check valve

Abstract

The present invention provides a refueling check valve, which includes a baffle and a valve body, the valve body includes a valve body and an axial hole column, a side column of the axial hole column is connected to the valve body, and an axial hole is provided at each end surface of the axial hole column; the baffle includes a plate body, two connecting pieces and two pivots, the two connecting pieces are connected to the plate body, the two pivots are respectively connected to the two connecting pieces, the position of the pivot corresponds to the position of the axial hole, and the pivot is inserted and connected to the axial hole. The application has a simple parts structure, a reduced number of parts required, and low cost.

Description

Technical Field

[0001] The invention relates to an automobile component, in particular to a high-efficiency refueling check valve connected with a fuel tank assembly and an oil filling system assembly. Background Art

[0002] The refueling check valve is installed on the car. Its working principle is: connect the fuel tank assembly with the fuel filling system assembly. When filling, the gasoline goes through the fuel filling pipe, opens the valve through the refueling check valve adaptively, and continues to flow into the fuel tank. When the fuel tank is full of oil, the gun jumps, the system stops supplying oil, and the refueling check valve closes adaptively to prevent gasoline from overflowing in the opposite direction.

[0003] Patent Nos. 2015800443695, 2017210476390 and 2018106892975 all disclose related technologies of refueling check valves. However, these prior art refueling check valves have the following defects in actual use:

[0004] 1. The joint and the valve body are not connected, but are sealed and connected by a connecting pipe and an O-ring;

[0005] 2. Rubber and valve body are injection molded, which has good sealing performance, but the process is complicated and difficult, and the output is limited;

[0006] 3. The baffle shaft uses a metal shaft as a pivot connection. The side of the valve body is provided with a hole for rotation, the side of the baffle is provided with a hole for rotation, and a torsion spring. The above three parts are inserted through the metal shaft. Because the torsion spring is subjected to force, it needs to be moved and fixed. After the metal shaft is inserted, it needs to be riveted and locked at both ends. This process requires tooling and fixtures to achieve, the process is cumbersome, there are many parts, and the cost is high.

[0007] Among them, patent number 2015800443695, when the baffle is injected, the molten plastic flows through one side of the pivot hole, forming a fork, and then merges again when flowing through the opposite side of the pivot hole. Because it cannot be completely fused, a seam is produced, commonly known as a weld line, and the strength at the weld line will be greatly weakened.

[0008] Therefore, there is still room for improvement in the existing technology. Summary of the invention

[0009] In view of the above-mentioned defects, the purpose of the present invention is to provide a refueling one-way valve with low cost, convenient installation, high output and reduced defective rate, so as to solve the technical problems of the prior art.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] A refueling one-way valve, the refueling one-way valve includes a baffle and a valve body, the valve body includes a valve body and an axial hole column, a side column of the axial hole column is connected to the valve body, and an axial hole is respectively opened at both end surfaces of the axial hole column; the baffle includes a plate body, two connecting plates and two pivots, the two connecting plates are connected to the plate body, the two pivots are respectively connected to the two connecting plates, the position of the pivot corresponds to the position of the axial hole, and the pivot is inserted and connected to the axial hole.

[0012] According to the refueling one-way valve described in the preferred embodiment of the present application, the baffle further includes two reinforcing plates, and the two reinforcing plates are respectively connected to the two connecting plates.

[0013] According to the refueling one-way valve described in the preferred embodiment of the present application, the baffle plate also includes a grooved plate, the grooved plate protrudes axially from the baffle plate, and the grooved plate has a groove.

[0014] According to the refueling one-way valve described in the preferred embodiment of the present application, a guide groove is opened on one side of the axial hole column connected to the valve body, and the guide groove includes two groove plates and a groove bottom surface, and the groove bottom surface is an inclined surface.

[0015] According to the refueling one-way valve described in the preferred embodiment of the present application, the axial hole column includes a middle spacer, the surface of the axial hole column on one side of the middle spacer is a smooth surface, and the other side of the middle spacer is the guide groove.

[0016] According to the refueling one-way valve described in the preferred embodiment of the present application, the refueling one-way valve also includes a torsion spring, the fixed arm of the torsion spring is connected to the valve body; the movable arm of the torsion spring is connected to the pressure groove.

[0017] According to the refueling one-way valve described in the preferred embodiment of the present application, the refueling one-way valve also includes a joint and a sealing ring, and the sealing ring is arranged between the joint and the valve body.

[0018] The technical solution of this application is an improvement on the existing series of refueling check valves:

[0019] 1. This application eliminates the connecting pipe and O-ring, optimizes the parts structure, realizes the direct snap connection between the valve body and the joint, and uses the sealing ring structure setting to solve the sealing performance;

[0020] 2. Process simplification: This application uses optimized parts structure to separate the sealing ring from the baffle. The sealing ring does not need to be encapsulated with rubber and baffle for a second time. It is directly pre-installed as a single part and inserted into the end face step of the joint and the valve body connection. The joint is then inserted through the valve body, and the sealing ring is locked by the buckle structure. This process has low cost, high efficiency, easy installation, and low defect rate.

[0021] 3. Reduction of parts: This application eliminates metal shaft parts, and the rotating pivot is integrated on the side pivot of the baffle, which is directly connected to the side shaft hole of the valve body;

[0022] 4. Assembly: The present application adopts a torsion spring pre-installed on the outer circumference of the shaft hole on the side of the valve body. The torsion spring fixed arm is against the largest outer circumference of the valve body, and the movable arm is moved to hang on the adjacent block of the shaft hole on the side of the valve body. At this time, the torsion spring can be fixed, and there will be no interference when the baffle is assembled. The pivot on one side of the baffle can be inserted into the shaft hole on one side of the side of the valve body first, and the pivot on the other side of the baffle slides into the shaft hole through the guide groove on the shaft hole column of the valve body. At this time, the torsion spring movable arm will automatically slide out of the block under the sliding action of the baffle, press the baffle, and the baffle is reset to the installation state under force;

[0023] 5. The present application changes the baffle into a shaft, which can effectively solve the injection molding risk. When the baffle and torsion spring are installed in the prior art, the efficiency of parts assembly is reduced due to the lack of the guide and fixing mechanism required for installation. The present application optimizes the structure and adds a stepped baffle in the middle of the middle spacer to temporarily fix the torsion spring during the installation process, effectively avoiding interference with the installation of the baffle. At the same time, when the baffle is installed and rotated to the maximum angle, the torsion spring can be automatically pushed out of the baffle and slide into the pressure groove of the baffle. The present application optimizes the structure and adds a guide groove to the outer ring of the middle spacer, which can accurately slide into the shaft hole and column hole when the baffle is installed.

[0024] Due to the adoption of the above technical features, the present invention has the following advantages and positive effects compared with the prior art:

[0025] First, the parts structure of the present application is simple, the number of parts required is reduced, and the cost is low;

[0026] Second, the process steps of the present application are reduced, the assembly efficiency is high, and the tooling and fixture design is simple.

[0027] Of course, any specific embodiment of the present invention does not necessarily have all of the above technical effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the appearance of the refueling check valve for this application;

[0029] Figure 2 Schematic diagram of the explosion of the refueling check valve for this application;

[0030] Figure 3 This is a schematic diagram of the valve body for this application;

[0031] Figure 4 Schematic diagram of the baffle and torsion spring for this application;

[0032] Figure 5 This is a top view of the refueling check valve of this application;

[0033] Figure 6 This is a schematic diagram of the connection between the valve body, baffle and torsion spring of this application;

[0034] Figure 7 for Figure 5 A schematic diagram of the main view;

[0035] Figure 8 This is a schematic diagram of the installation of the torsion spring for this application;

[0036] Fig. 9 This is a schematic diagram of the baffle installation for this application;

[0037] Fig.10 for Fig. 9 Partially enlarged schematic diagram;

[0038] Fig.11 This is a cutaway schematic diagram of the refueling one-way valve for this application. DETAILED DESCRIPTION

[0039] Several preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components, etc. are not described in detail. Please refer to Figure 1 and Figure 2 The schematic diagram of the appearance of the refueling one-way valve of the present application and the schematic diagram of its explosion are shown. The refueling one-way valve of the present application is assembled on a car, connecting a fuel tank assembly (not shown) and a fuel filling system assembly (not shown). When filling oil, gasoline passes through the fuel filling pipe and opens the valve adaptively through the refueling one-way valve to continuously flow into the fuel tank. When the fuel tank is full of oil, the gun jumps and the system stops supplying oil. The refueling one-way valve adaptively closes to prevent gasoline from overflowing in the opposite direction. The refueling one-way valve includes a connector 10, a sealing ring 20, a valve body 30, a baffle 40 and a torsion spring 50.

[0040] Please refer to Figure 3 The valve body 30 includes a valve body 31 and an axial hole column 32, and a side column of the axial hole column 32 is connected to the valve body 31. Figure 3In the figure, one side column of the shaft hole column 32 is connected to the valve body 31 through a sheet with a reinforced base, and the other side column of the shaft hole column 32 keeps a distance from the valve body 31 to facilitate the connection of the torsion spring 50. An shaft hole 33 is provided on each of the two end faces of the shaft hole column 32. In the embodiment of the present application, there is no through-hole between the two shaft holes 33, but this cannot be used to limit the present application. As long as a through hole is formed by connecting the two shaft holes 33 and the baffle 40 can be stably connected, it should be within the protection scope of the present application.

[0041] Please refer to Figure 4 Schematic diagram of the baffle 40 and torsion spring 50 of the present application, the baffle 40 is covered at the opening of the valve body 30 by the pressure of the torsion spring 50, the baffle 40 includes a plate body 41, two connecting pieces 42 and two pivots 43, the two connecting pieces 42 are connected to the plate body 41, as shown in the figure, one side of the connecting piece 42 is connected to the plate body 41, and the other side of the connecting piece 42 is outside the diameter range of the plate body 41, the two pivots 43 are respectively connected to the two connecting pieces 42, the position of the pivot 43 corresponds to the position of the shaft hole 33, when assembled, the pivot 43 is inserted into and connected to the shaft hole 33. In order to increase the connection strength, the baffle 40 also includes two reinforcing pieces 44, the two reinforcing pieces 44 are respectively connected to the two connecting pieces 42, Figure 4 The two reinforcing sheets 44 are arranged in parallel on the baffle 40 , and one side of the reinforcing sheet 44 is connected to the connecting sheet 42 .

[0042] like Figure 4 As shown, the baffle 40 further includes a grooved sheet 45, the grooved sheet 45 axially protrudes from the baffle 40, and the grooved sheet 45 is provided with a groove 46, the groove 46 is a notch on the sheet body, please refer to Figure 5The purpose of setting the pressing groove 46 is to connect the torsion spring 50, and the torsion spring 50 will not move around when entering the pressing groove 46. In the embodiment of the present application, the two ends of the pressing groove sheet 45 are respectively connected to the two reinforcing sheets 44. This design facilitates the torsion spring 50 to enter the pressing groove 46, but it cannot be used to limit the present application. Even if the two ends of the pressing groove sheet 45 do not touch the reinforcing sheets 44, as long as it facilitates the torsion spring 50 to enter the pressing groove 46, it should be within the protection scope of the present application. In addition, the plate body 41, two connecting sheets 42, two pivots 43, two reinforcing sheets 44, the pressing groove sheet 45 and the pressing groove 46 are integrally formed in the present application. This one-piece design ensures that the pivot 43 will not be deformed after being inserted and connected to the shaft hole 33, and the overall structural strength of the connecting sheet 42 and the reinforcing sheet 44 is strong, there will be no internal stress, and it will not be overturned by force. The pivot 43 is inserted into the shaft hole 33 and is strongly supported. When the baffle is injected, the molten plastic flows through one side of the pivot hole, forming a fork, and then merges again when it flows through the opposite side of the pivot hole. Because it cannot be completely fused, a seam is formed, commonly known as a weld line, and the strength of the weld line will be greatly weakened. This application changes the baffle to a shaft, which can effectively solve the injection molding risk.

[0043] Please also refer to Figure 3 and Figure 6 A guide groove 34 is opened on one side of the shaft hole column 32 connected to the valve body 31, and the guide groove 34 includes two groove plates and a groove bottom surface, and the groove bottom surface is an inclined surface. During assembly, the pivot 43 on the other side is first inserted into the shaft hole 33. Prior to this, the torsion spring 50 has been first sleeved on the shaft hole column 32, and then the pivot 43 on this side is placed in the guide groove 34. Under the limitation of the two groove plates, the pivot 43 gradually slides into the shaft hole 33 along the groove bottom surface of the inclined surface, thereby completing the connection between the valve body 30, the baffle 40 and the torsion spring 50.

[0044] like Figure 6 As shown, the shaft hole column 32 includes a middle spacer 35, the surface of the shaft hole column 32 on one side of the middle spacer 35 is a smooth surface, and the other side of the middle spacer 35 is the guide groove 34; the side of the shaft hole column 32 with a smooth surface, that is, the side where the shaft hole column 32 and the valve body 31 maintain a distance, the torsion spring 50 is sleeved and connected to the side of the shaft hole column 32 with a smooth surface. After assembly, the fixed arm of the torsion spring 50 is connected to the valve body 30, as shown in FIG. Figure 7 As shown, the fixed arm of the torsion spring 50 abuts against the largest outer circumferential surface of the valve body 30; in addition, as shown Figure 5 As shown, the movable arm of the torsion spring 50 is connected to the pressing groove 46 .

[0045] Please also refer to Figure 6 , Figure 8, Fig. 9 and Fig.10 Schematic diagram of the installation of the torsion spring 50 and the baffle 40, the torsion spring 50 is pre-installed on the outer circumference of the shaft hole 33 on the side of the valve body 30, and the fixed arm of the torsion spring 50 is against the largest outer circumference of the valve body 30, as shown in FIG. Figure 6 As shown, one side of the middle spacer 35 is a notch step 351, and the notch step 351 is like a stopper. Figure 8 As shown in the direction of the arrow, the movable arm of the torsion spring 50 is moved to hang the fixed arm of the torsion spring 50 on the notched step 351 on one side of the middle spacer 35, as shown in FIG. Fig. 9 and Fig.10 As shown, the notched step 351 blocks the movable arm of the torsion spring 50 from sliding. Fig.10 The movable arm of the torsion spring 50 is a schematic diagram, which is used to show the position of the movable arm and the notched step 351. At this time, the torsion spring 50 is fixed, and the baffle 40 will not interfere when assembled. The pivot 43 on one side of the baffle 40 first penetrates the shaft hole 33 on one side of the side of the valve body 30, and the pivot 43 on the other side of the baffle 40 slides into the shaft hole 33 through the guide groove 34 on the shaft hole column 32 of the valve body 30. At this time, the movable arm of the torsion spring 50 will automatically break away from the obstruction of the notched step 351 and slide into the pressure groove 46 due to the sliding action of the baffle 40. Figure 5 The baffle plate 40 is pressed in the middle, and the baffle plate 40 is reset to the installed state by the force.

[0046] Please also refer to Fig.11 The cross-sectional diagram of the refueling check valve of the present application; the cross-sectional surface of the sealing ring 20 in the figure is Y-shaped, and the short part of the outer side of the Y-shaped is squeezed during assembly to ensure the strength of the seal. The sealing ring 20 is arranged between the connector 10 and the valve body 30. The sealing ring 20 is pre-installed and inserted into the end face step of the connecting part of the connector 10, and then the valve body 30 is inserted into the connector 10 after assembly, and the sealing ring 20 is locked by the buckle structure, such as Figure 2 As shown, the connector 10 has a plurality of evenly distributed latching protrusions 11 , and correspondingly, the valve body 30 has a plurality of evenly distributed latching grooves 36 . During assembly, the latching protrusions 11 are inserted into the latching grooves 36 , so that the connector 10 and the valve body 30 are tightly combined.

[0047] In summary, due to the adoption of the above technical features, the present invention has the following advantages and positive effects compared with the prior art:

[0048] First, the parts structure of the present application is simple, the number of parts required is reduced, and the cost is low;

[0049] Second, the process steps of the present application are reduced, the assembly efficiency is high, and the tooling and fixture design is simple.

[0050] The preferred embodiments of the invention are only used to help illustrate the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made based on the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that technicians in the relevant technical field can make good use of the invention. The present invention is only limited by the claims and their full scope and equivalents. The above disclosure is only the preferred embodiment of the present invention, but it is not intended to limit itself. Any equivalent changes and modifications made by any technician familiar with the art without violating the spirit and connotation of the invention should fall within the scope of protection of the present invention.

Claims

1. A refueling check valve, characterized in that: The refueling check valve comprises a baffle, a torsion spring and a valve body, wherein the valve body comprises a valve body and an axial hole column, a side column of the axial hole column is connected to the valve body, and an axial hole is respectively provided at both end surfaces of the axial hole column; The baffle comprises a plate body, two connecting pieces and two pivots, the two connecting pieces are connected to the plate body, the two pivots are respectively connected to the two connecting pieces, the positions of the pivots correspond to the positions of the shaft holes, and the pivots are inserted into and connected to the shaft holes; A guide groove is formed on one side of the shaft hole column connected to the valve body, wherein the guide groove comprises two groove plates and a groove bottom surface, and the groove bottom surface is an inclined surface; The shaft hole column includes a middle spacer, one side of the middle spacer is a notch step, and the notch step blocks the torsion spring from sliding; The pivot, under the limitation of the two groove plates, gradually slides into the shaft hole along the groove bottom surface of the inclined surface, thereby completing the connection between the valve body, the baffle plate and the torsion spring.

2. The refueling check valve according to claim 1, characterized in that: The baffle further comprises two reinforcing plates, and the two reinforcing plates are respectively connected to the two connecting plates.

3. The refueling check valve according to claim 2, characterized in that: The baffle plate further comprises a groove pressing sheet, the groove pressing sheet protrudes axially from the baffle plate, and the groove pressing sheet is provided with a groove.

4. The refueling check valve according to claim 3, characterized in that: The surface of the shaft hole column on one side of the middle spacer is a smooth surface, and the other side of the middle spacer is the guide groove.

5. The refueling check valve according to claim 4, characterized in that: The fixed arm of the torsion spring is connected to the valve body; the movable arm of the torsion spring is connected to the pressure groove.

6. The refueling check valve according to claim 5, characterized in that: The refueling one-way valve also includes a joint and a sealing ring, and the sealing ring is arranged between the joint and the valve body.

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