A vehicle fuel filler neck integrated filler neck

Abstract

The utility model discloses an integrated filling pipe head of automobile oil filler pipe belongs to oil filler pipe technical field, and this filling pipe head includes main pipe and inner bushing, and the inner wall of main pipe is equipped with first lug along the circumferential direction, and the inner bushing is equipped with first clamping slot, and the inner wall of main pipe is equipped with second salient point still, and the inner bushing is equipped with second through -hole, and the second through -hole is equipped with elastic sheet, and the gap between the top of elastic sheet and the inner wall of second through -hole is left, and the gap is used to accommodate second salient point. The utility model discloses through setting up main pipe and inner bushing, limit the axial displacement and circumferential displacement of inner bushing, make inner bushing with main pipe connection, no longer need to weld connection, reduce heat affected zone, improve corrosion -resistant performance, after the rotation of inner bushing to the specified position, the elastic sheet will give out the sound under the action of elasticity, remind staff that inner bushing has been installed in place, and the assembly is simple and reliable, and the inner bushing is firmly limited, and the production technology of filling pipe head is simplified, and the production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of refueling pipe technology, specifically relating to an integrated refueling pipe head for automobiles. Background Technology

[0002] Currently, most automotive fuel filling lines use either galvanized pipes with a surface coating or all-stainless steel. The all-stainless steel option is only used in a few high-end models due to its high material cost. Most mainstream models still use galvanized pipes with a surface coating. During welding, the zinc layer of the galvanized pipe is damaged by the localized high temperature at the weld joint, affecting its subsequent corrosion resistance. This is especially true for the fuel filler nozzle, which is typically designed as a main filler pipe with a guide port. The guide port is fully welded to the filler nozzle using a full-circle weld, resulting in a large heat-affected zone and severe damage to the zinc layer inside the pipe. Since this is a point of customer perception, the requirements are generally higher than for conventional pipes. In some coastal and cold northern regions, the corrosion resistance requirements are even more stringent. In these cases, localized damage will significantly reduce the overall corrosion resistance of the product. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an integrated refueling pipe head for automobiles, which reduces the welding of the refueling pipe head.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] An integrated refueling nozzle for automobiles includes a main pipe and an inner liner disposed within the main pipe. A first protrusion is provided on the inner wall of the main pipe along the circumferential direction. A first groove corresponding to the first protrusion is provided on the inner wall of the main pipe. A second protrusion is also provided on the inner wall of the main pipe. A second through hole corresponding to the second protrusion is provided on the inner liner. An elastic plate is provided in the second through hole. A gap is left between the top of the elastic plate and the inner wall of the second through hole. The gap is used to accommodate the second protrusion.

[0006] Furthermore, the elastic plate extends along the circumferential direction of the inner liner tube.

[0007] Furthermore, the outer wall of the elastic plate is provided with a guide groove.

[0008] Furthermore, the first card slot is a U-shaped card slot.

[0009] Furthermore, there is one or more of the first protrusions, and there is also one or more of the first card slots.

[0010] Furthermore, the main pipe includes a first pipe section, a first tapered section connected to the first pipe section, a second pipe section connected to the first tapered section, a second tapered section connected to the second pipe section, and a third pipe section connected to the second tapered section.

[0011] Furthermore, the inner liner includes a first inner pipe section, a second inner pipe section connected to the first inner pipe section, and a third inner pipe section connected to the second inner pipe section. The maximum outer diameter of the first inner pipe section is greater than the minimum inner diameter of the first tapering section, and the maximum outer diameter of the second inner pipe section is less than the inner diameter of the second pipe section.

[0012] Furthermore, the inner wall of the first pipe section is provided with a first threaded protrusion.

[0013] Furthermore, the second pipe section is provided with a first reserved interface, and the second inner pipe section is provided with a third through hole corresponding to the first reserved interface, and a first baffle is provided in the third through hole.

[0014] Furthermore, both the inner and outer surfaces of the main tube are coated.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] 1. By setting a main pipe and an inner liner, with a first protrusion and a second protrusion on the main pipe and a corresponding first slot and a second through hole on the inner liner, the axial and circumferential displacement of the inner liner is restricted, so that the inner liner can be connected to the main pipe without welding, reducing the heat-affected zone and improving corrosion resistance.

[0017] 2. An elastic plate is installed in the second through hole to restrict the second protrusion. After the inner liner tube is rotated to the designated position, the elastic plate will make a sound under the action of elasticity to remind the staff that the inner liner tube has been installed in place.

[0018] 3. The assembly is simple and reliable, the inner liner is firmly positioned, the production process of the filling pipe head is simplified, and the production cost is reduced. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the inner liner structure in the embodiment;

[0021] Figure 3 This is a schematic diagram of the structure from another angle of the embodiment;

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA in the middle;

[0023] Figure 5 This is a schematic diagram of the inner liner tube from another angle in the embodiment;

[0024] Figure 6 This is a perspective structural diagram of an embodiment;

[0025] Figure 7 This is a schematic diagram of the structure from another perspective of the embodiment. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0027] like Figure 1 As shown, an integrated refueling nozzle for automobiles includes a main pipe 1 and an inner liner 2. The main pipe 1 is a circular pipe and includes a first pipe section 11, a first tapering section 12, a second pipe section 13, a second tapering section 14, and a third pipe section 15. The first pipe section 11 has the largest inner diameter, and the refueling nozzle is inserted into the main pipe 1 through the first pipe section 11. The first tapering section 12 is connected to the first pipe section 11, and the inner diameter of the first tapering section 12 gradually decreases. The second pipe section 13 is connected to the first tapering section 12, and the inner diameter of the second pipe section 13 is equal to the smallest inner diameter of the first tapering section 12. The second tapering section 14 is connected to the second pipe section 13, and the inner diameter of the second tapering section 14 gradually decreases. The third pipe section 15 is connected to the second tapering section 14, and the inner diameter of the third pipe section 15 is equal to the smallest inner diameter of the second tapering section 14. The third pipe section 15 is used to connect to the refueling nozzle.

[0028] like Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the inner liner 2 is installed inside the main pipe 1. The inner liner 2 is installed inside the main pipe 1 in a post-assembly manner. The inner liner 2 is a plastic pipe and includes a first inner pipe section 21, a second inner pipe section 22, and a third inner pipe section 23. The inner liner 2 is a circular pipe as a whole. The first inner pipe section 21 is a semi-circular pipe with the largest outer diameter. The second inner pipe section 22 is connected to the first inner pipe section 21, and the maximum outer diameter of the second inner pipe section 22 is smaller than the maximum outer diameter of the first inner pipe section 21. The third inner pipe section 23 is connected to the second inner pipe section 22, and the maximum outer diameter of the third inner pipe section 23 is smaller than the maximum outer diameter of the second inner pipe section 22. The outer wall of the third inner pipe section 23 is also provided with reinforcing ribs to enhance the structural strength. The maximum outer diameter of the reinforcing ribs is also smaller than the maximum outer diameter of the second inner pipe section 22.

[0029] like Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the maximum outer diameter of the second inner pipe section 22 is smaller than the inner diameter of the second pipe section 13, so the inner liner 2 can be inserted into the main pipe 1 along the axial direction as a whole. The maximum outer diameter of the first inner pipe section 21 is larger than the minimum inner diameter of the first tapering section 12, so the first inner pipe section 21 is blocked by the first tapering section 12. At the same time, the maximum outer diameter of the reinforcing rib on the outer wall of the third inner pipe section 23 is larger than the minimum inner diameter of the second tapering section 14, so the third inner pipe section 23 is blocked by the second tapering section 14. The inner liner 2 can no longer be pushed forward along the axial direction when it reaches the innermost end. The inner wall of the second section 13 of the main pipe 1 is provided with a first protrusion 3 along the circumferential direction. The first protrusion 3 is strip-shaped and the side of the first protrusion 3 is arc-shaped. There are two first protrusions 3, which are arranged in a ring array on the inner circumferential side wall of the main pipe 1. The second inner section 22 of the inner liner pipe 2 is provided with two first slots 4. The two first slots 4 correspond one-to-one with the two first protrusions 3. The two first slots 4 are arranged in a ring array on the outer circumferential side wall of the second inner section 22. The first slots 4 are U-shaped slots with a notch on one side. When the inner liner pipe 2 reaches the innermost end of the main pipe 1, the inner liner pipe 2 is rotated, and the first protrusion 3 enters the corresponding first slot 4 from the notch, so that the first protrusion 3 is locked in the first slot 4. The first protrusion 3 and the corresponding first slot 4 can limit the axial displacement of the inner liner pipe 2, so that the inner liner pipe 2 no longer moves in the axial direction.

[0030] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the inner wall of the second section 13 of the main pipe 1 is also provided with a second protrusion 5. The second protrusion 5 is round and the side of the second protrusion 5 is arc-shaped. The second inner section 22 of the inner liner pipe 2 is provided with a second through hole 6. The position of the second through hole 6 corresponds to the position of the second protrusion 5. The second through hole 6 is a rectangular hole. An elastic plate 61 is provided in the second through hole 6. The elastic plate 61 is a rectangular plate. In this embodiment, the elastic plate 61 is integrally connected with the inner liner pipe 2. The elastic plate 61 extends from one side wall of the second through hole 6 to the other side wall along the circumference of the inner liner pipe 2. A gap 601 is left between the top of the elastic plate 61 and the inner wall of the second through hole 6. The gap 601 is used for The second protrusion 5 is accommodated. When the inner liner tube 2 reaches the innermost end of the main tube 1, the inner liner tube 2 is rotated, and the second through hole 6 moves to the position of the second protrusion 5. The second protrusion 5 enters the gap 601. At this time, the second protrusion 5 is blocked on one side of the circumferential direction by the elastic plate 61 and cannot rotate back. At the same time, since the first slot 4 is also rotated and locked on the first protrusion 3, and the other side is blocked by the first protrusion 3, the inner liner tube 2 as a whole can no longer rotate, thus restricting the circumferential position of the inner liner tube 2. At the same time, since the first slot 4 is also locked on the first protrusion 3, it also restricts the axial movement. Therefore, the inner liner tube 2 is fixed in the main tube 1 and will no longer loosen or fall off. The outer wall of the elastic plate 61 is provided with a guide groove 611, and triangular grooves are provided on both sides of the guide groove 611. The guide groove 611 is set in a triangular transition mode on both sides, which can reduce the interference and contact area between the inner liner tube 2 and the second protrusion 5 on the main tube 1 during assembly and rotation, reduce the force and change of elastic deformation during rotation, and make it easier to slide past the second protrusion 5 to form a reverse limit. During the rotation of the inner liner tube 2, the second protrusion 5 will push the elastic plate 61 inward. When the second protrusion 5 falls into the gap 601, the elastic plate 61 resets and will make a sound under the action of elasticity to remind the staff that the inner liner tube 2 has been installed in place.

[0031] like Figure 1 , Figure 4 and Figure 7 As shown, the inner wall of the first pipe section 11 is provided with a first threaded protrusion 7. The first threaded protrusion 7 is used to facilitate the connection between the first pipe section 11 and the oil filler cap. The minimum inner diameter of the first threaded protrusion 7 is greater than the maximum outer diameter of the inner liner 2, so it will not block the entry of the inner liner 2. The outer edge of the first pipe section 11 is flanged and flattened to meet the corresponding interface standard requirements.

[0032] like Figure 1 , Figure 5 and Figure 6As shown, the second pipe section 13 is provided with a first reserved interface 131, which is a circular through hole. The first reserved interface 131 is used to connect the return air pipe. The second inner pipe section 22 is provided with a third through hole 221, which is located corresponding to the first reserved interface 131. When refueling, the gas enters the third through hole 221 from the first reserved interface 131 connected to the return air pipe, which is used for oil and gas circulation. The third through hole 221 is provided with a first baffle 222, which forms a shield on the front of the first reserved interface 131 to prevent oil from escaping or splashing.

[0033] In this embodiment, the main pipe 1 is made of galvanized pipe. After the head is flared and expanded, the main body has an inner diameter of 46.8mm (inner diameter at the first pipe section 11), and the lower part of the main body has an inner diameter of 39mm (inner diameter at the second pipe section 13). The first pipe section 11 is then formed with a first threaded protrusion 7 (minimum inner diameter of the first threaded protrusion 7 is 40.44mm) and a sealing surface to meet the corresponding interface standard requirements. After the metal main pipe 1 is formed, it undergoes passivation treatment to improve surface corrosion resistance. The surface is then electrostatically powder-coated to form an epoxy resin coating, further improving the surface corrosion resistance and meeting the requirements of ≥480h for the outer surface of the neutral salt spray refueling pipe, ≥120h for the inner surface of the refueling pipe, and ≥168h for the inner surface of the refueling port. The inner liner 2 is made of plastic and is injection molded. The maximum outer diameter of the inner liner 2 is 40mm, which can easily pass through the first threaded protrusion 7. The inner liner 2 can be screwed in and installed after the metal main pipe 1 is formed and surface-treated.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An integrated refueling hose head for automobiles, characterized in that, The device includes a main tube (1) and an inner liner tube (2) disposed inside the main tube (1). A first protrusion (3) is provided on the inner wall of the main tube (1) along the circumferential direction. A first slot (4) corresponding to the first protrusion (3) is provided on the inner liner tube (2). A second protrusion (5) is also provided on the inner wall of the main tube (1). A second through hole (6) corresponding to the second protrusion (5) is provided on the inner liner tube (2). An elastic plate (61) is provided inside the second through hole (6). A gap (601) is left between the top of the elastic plate (61) and the inner wall of the second through hole (6). The gap (601) is used to accommodate the second protrusion (5).

2. The integrated refueling hose head for automobiles according to claim 1, characterized in that, The elastic plate (61) extends along the circumferential direction of the inner liner tube (2).

3. The integrated refueling hose head for automobiles according to claim 2, characterized in that, The outer wall of the elastic plate (61) is provided with a guide groove (611).

4. The integrated refueling hose head for automobiles according to claim 1, characterized in that, The first card slot (4) is a U-shaped card slot.

5. The integrated refueling hose head for automobiles according to claim 1, characterized in that, There is one or more of the first protrusion (3) and there is one or more of the first card slot (4).

6. The integrated refueling hose head for automobiles according to claim 1, characterized in that, The main pipe (1) includes a first pipe section (11), a first tapered section (12) connected to the first pipe section (11), a second pipe section (13) connected to the first tapered section (12), a second tapered section (14) connected to the second pipe section (13), and a third pipe section (15) connected to the second tapered section (14).

7. The integrated refueling hose head for automobiles according to claim 6, characterized in that, The inner liner (2) includes a first inner pipe section (21), a second inner pipe section (22) connected to the first inner pipe section (21), and a third inner pipe section (23) connected to the second inner pipe section (22). The maximum outer diameter of the first inner pipe section (21) is greater than the minimum inner diameter of the first tapering section (12), and the maximum outer diameter of the second inner pipe section (22) is less than the inner diameter of the second pipe section (13).

8. The integrated refueling hose head for automobiles according to claim 6, characterized in that, The inner wall of the first pipe section (11) is provided with a first threaded protrusion (7).

9. The integrated refueling hose head for automobiles according to claim 7, characterized in that, The second pipe section (13) is provided with a first reserved interface (131), and the second inner pipe section (22) is provided with a third through hole (221) corresponding to the first reserved interface (131). The third through hole (221) is provided with a first baffle (222).

10. The integrated refueling hose head for automobiles according to claim 6, characterized in that, The inner and outer surfaces of the main tube (1) are coated.

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