Oil filling port assembly of oil tank

Abstract

The utility model relates to the technical field of automobile oil tanks, and discloses an oil tank oil filling port assembly which comprises an oil tank shell, an oil tank oil filling port, a first oil filling port, a second oil filling port, a second oil filling port, a first oil filling port and a second oil filling port. The oil filling port is formed in the mounting hole, a first annular protrusion is integrally formed on the peripheral wall of the oil filling port, and the first annular protrusion abuts against the first arc-shaped face to form a welding seam; the installation channel assembly is arranged in the oil tank shell corresponding to the installation hole, and the second end of the oil filling port is arranged in the installation channel assembly in a sealed mode. According to the oil tank oil filling port assembly, the first arc-shaped face and the first annular protrusion abut against each other to form the welding seam, the second end of the oil filling port is installed in the installation channel assembly in a sealed mode so that accurate positioning and stable clamping of the oil filling port can be facilitated, and therefore the requirement for the flatness of a welding area is lowered while the welding quality is guaranteed; and the number of parts and procedures can be reduced, and the production cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive fuel tank technology, specifically to a fuel tank filler neck assembly. Background Technology

[0002] Fuel tanks used in automobiles include high-pressure fuel tanks and atmospheric-pressure fuel tanks. Taking high-pressure fuel tanks as an example, the high-pressure fuel tanks used in hybrid vehicles have higher requirements for pressure resistance compared to the atmospheric-pressure fuel tanks used in ordinary gasoline vehicles. Therefore, high-pressure fuel tanks and filler necks are usually made of metal, and the filler neck is welded to the high-pressure fuel tank. Resistance ring projection welding is a common process for welding metal filler necks in high-pressure fuel tanks. This process requires the filler neck welding position to be designed as an annular flange. However, to ensure welding quality, this process has extremely high requirements for the flatness of the welding area (usually requiring a flatness of 0.2), which is difficult to meet with stamped parts. Therefore, a flange needs to be designed separately and welded to the filler neck to form an annular flange at the filler neck welding position. Furthermore, the requirement for consistent flange height is also very high, resulting in more processes and higher production costs. Utility Model Content

[0003] In view of this, the present invention provides a fuel tank filler port assembly to solve the problem that in order to ensure the welding quality of the resistance ring projection welding process, the flatness requirements of the welding area are high, which is difficult to meet by stamping parts. It is necessary to design a separate flange to form an annular flange at the welding position of the filler port, which leads to many processes and high production costs.

[0004] This utility model provides a fuel tank filler neck assembly, including:

[0005] The fuel tank shell has mounting holes, and the junction between the mounting holes and the outer wall of the fuel tank shell is set as a first arc-shaped surface;

[0006] The filler port is tubular and is located in the mounting hole. The first end of the filler port extends out of the mounting hole. The peripheral wall of the filler port is integrally formed with a first annular protrusion. The first annular protrusion abuts against the first arc-shaped surface and forms a weld, which is suitable for welding the weld.

[0007] The mounting channel assembly has corresponding mounting holes located inside the fuel tank housing, and the second end of the filler neck is sealed inside the mounting channel assembly.

[0008] In one alternative implementation, the radius of the first arcuate surface is 3 mm to 4 mm.

[0009] In one alternative embodiment, the outer edge of the first annular protrusion is provided with a second arcuate surface, which is adapted to abut against the first arcuate surface.

[0010] In one alternative implementation, the radius of the second arcuate surface is 1 mm to 1.5 mm.

[0011] In one alternative embodiment, the installation channel assembly includes an installation tube with a stepped platform formed on the inner wall of the installation tube. A sealing ring is provided at the stepped platform, and a second annular protrusion is provided on the outer peripheral wall of the oil filler port. The second annular protrusion is adapted to abut the sealing ring against the stepped platform.

[0012] In one optional embodiment, an abutment ring is further provided between the second annular protrusion and the sealing ring, the second annular protrusion abutting against the sealing ring via the abutment ring, and the abutment ring abutting against the outer wall of the oil filler port and the inner wall of the mounting pipe respectively.

[0013] In one alternative embodiment, the wall of the mounting tube is further provided with a clamp, which is located on the side of the second annular protrusion facing the mounting hole. The first end of the clamp is connected to the mounting tube, and the second end is adapted to press against the outer wall of the filler neck and has a tendency to move toward the inside of the filler neck.

[0014] In one alternative embodiment, the number of grippers is three, and the three grippers are equidistantly spaced along the circumference of the pipe wall.

[0015] In one alternative embodiment, a sliding contact surface is provided at the edge of the second end of the gripper near the mounting hole. The sliding contact surface is an arc surface or a straight inclined surface, which is suitable for driving the gripper to make way for the oil filler during the process of inserting the oil filler into the mounting tube.

[0016] In one alternative embodiment, the outer wall of the second end of the filler port is tapered, and the outer diameter of the second end of the filler port gradually decreases along the oil inlet direction.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. The fuel tank filler port assembly provided by this utility model sets the junction of the mounting hole and the outer wall of the fuel tank shell as a first arc-shaped surface, and seals the second end of the filler port in the mounting channel assembly. The first annular protrusion abuts against the first arc-shaped surface to form a weld for welding, so as to facilitate the precise positioning and stable clamping of the filler port. This reduces the requirements for the flatness of the welding area while ensuring the welding quality. It is suitable for stamped parts and helps to reduce the number of parts and processes and reduce production costs.

[0019] 2. In the fuel tank filler port assembly provided by this utility model, the first arc-shaped surface and the second arc-shaped surface abut against each other, and the two arc-shaped contact surfaces are deformed under pressure, which helps to make the first arc-shaped surface and the second arc-shaped surface fit more tightly.

[0020] 3. The fuel tank filler neck assembly provided by this utility model has a second annular protrusion and a stepped platform that clamp the sealing ring to prevent fuel from leaking from the gap between the filler neck and the mounting pipe.

[0021] 4. The fuel tank filler neck assembly provided by this utility model has an abutment ring between the sealing ring and the second annular protrusion. The abutment ring abuts against the outer wall of the filler neck and the inner wall of the mounting pipe, so as to form a double seal between the abutment ring and the sealing ring, which is beneficial to improving the sealing effect.

[0022] 5. The fuel tank filler neck assembly provided by this utility model has a first end of the gripper connected to the mounting tube, a second end abutting against the outer wall of the filler neck, and has a tendency to move towards the axis of the filler neck, so as to pull down the filler neck by friction, thereby keeping the first arc-shaped surface and the first annular protrusion in contact.

[0023] 6. The fuel tank filler neck assembly provided by this utility model has three grippers that are equally spaced to improve the force balance of the filler neck.

[0024] 7. The fuel tank filler neck assembly provided by this utility model, by setting a sliding contact surface, allows the filler neck to press against the sliding contact surface during the installation process, thereby causing the second end of the clamp to move away from the filler neck. This makes room for the filler neck installation, improving the ease of installation.

[0025] 8. The fuel tank filler neck assembly provided by this utility model has a tapered outer wall at the second end of the filler neck, which facilitates smoother contact and sliding with the sliding contact surface during the installation of the filler neck. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a fuel tank filler neck assembly according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 A schematic diagram of the cross-section at point AA;

[0029] Figure 3 for Figure 1 A magnified view of part B in the diagram;

[0030] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the filler neck.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fuel tank housing; 2. Filler neck; 3. First arc-shaped surface; 4. First annular protrusion; 5. Mounting channel assembly; 51. Mounting pipe; 511. Stepped platform; 52. Sealing ring; 53. Abutment ring; 54. Clamp; 541. Sliding abutment surface; 6. Second arc-shaped surface; 7. Conical surface; 8. Second annular protrusion. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] The following is combined Figures 1 to 4 The following describes embodiments of the present invention. Figure 1 This is a cross-sectional schematic diagram of the area where the fuel tank shell 1 and the filler port 2 are connected.

[0035] According to an embodiment of the present invention, a fuel tank filler neck assembly is provided, comprising:

[0036] The fuel tank housing 1 has mounting holes, and the junction of the mounting holes and the outer wall of the fuel tank housing 1 is set as a first arc-shaped surface 3.

[0037] The filler port 2 is tubular and is located in the mounting hole. The first end of the filler port 2 extends out of the mounting hole. The peripheral wall of the filler port 2 is integrally formed with a first annular protrusion 4. The first annular protrusion 4 abuts against the first arc-shaped surface 3 and forms a weld, which is suitable for welding the weld.

[0038] The mounting channel assembly 5 has a corresponding mounting hole inside the fuel tank housing 1, and the second end of the fuel filler port 2 is sealed inside the mounting channel assembly 5.

[0039] The fuel tank filler port assembly provided in this embodiment sets the junction of the mounting hole and the outer wall of the fuel tank housing 1 as a first arc-shaped surface 3. The second end of the filler port 2 is sealed and installed in the mounting channel assembly 5. The first annular protrusion 4 abuts against the first arc-shaped surface 3 to form a weld for welding, so as to facilitate the precise positioning and stable clamping of the filler port 2. This reduces the requirements for the flatness of the welding area while ensuring the welding quality. It is suitable for stamped parts, which helps to reduce the number of parts and processes and reduce production costs.

[0040] Specifically, the fuel tank housing 1 can be composed of two fuel tank halves, with a mounting hole located on one of the halves. The first end of the filler neck 2 is exposed outside the fuel tank housing 1, and the second end of the filler neck 2 extends into the mounting channel assembly 5, forming a sealed connection with it to prevent fuel leakage from the gap between the filler neck 2 and the mounting channel assembly 5. Furthermore, a filter screen is installed inside the filler neck 2 to intercept impurities in the fuel during refueling.

[0041] The first annular protrusion 4 is set around the circumference of the filler neck 2. Combined with... Figure 1 As shown, a raised first arc-shaped surface 3 is provided at the junction of the mounting hole and the outer wall of the fuel tank housing 1 to form an arc transition. The outer diameter of the first annular protrusion 4 is slightly larger than the inner diameter of the mounting hole, so that the first annular protrusion 4 can abut against the first arc-shaped surface 3. The first arc-shaped surface 3 serves as a limiting function. The first annular protrusion 4 of the fuel filler port 2 abuts against the first arc-shaped surface 3, and the second end of the fuel filler port 2 is sealed to the mounting channel assembly 5, thereby limiting the fuel filler port 2 in its axial and radial directions, achieving precise positioning and stable clamping of the fuel filler port 2 to ensure welding quality. This structure does not require extremely high flatness requirements, which can reduce the processing accuracy requirements to meet the requirements of stamped parts. It allows the metal fuel filler port and fuel tank housing 1 to be quickly formed by processes such as stamping or cold heading, eliminating the need for a separate flange design, reducing the number of parts, and eliminating the brazing process between the flange and the fuel filler port 2, reducing the number of processes, making operation convenient and efficient, and helping to reduce production costs. The resistance ring projection welding used in related technologies is a resistance welding process, and the welding process quality is difficult to monitor, resulting in problems such as unstable weld penetration and strength. The fuel tank filler port assembly provided in this embodiment has a weld formed by the first arc-shaped surface 3 and the first annular protrusion 4 abutting together. The weld can be welded using laser filler wire welding technology. The weld can also effectively constrain the position of the welding wire, ensuring that the position of the welding wire remains at a certain position during the feeding process. This helps to ensure the consistency of the relative position between the end of the welding wire and the laser beam spot, achieving the effect of consistent welding wire melting amount and ensuring the consistency of weld size.

[0042] In one embodiment, the radius of the first arcuate surface 3 is 3 mm to 4 mm.

[0043] For example, in some embodiments, the radius of the first arcuate surface 3 can be 3mm or 3.2mm or 3.4mm or 3.5mm or 3.8mm or 4mm, or it can be a range formed by any two of the above values.

[0044] In one embodiment, combined Figure 3 and Figure 4As shown, the outer edge of the first annular protrusion 4 is provided with a second arc-shaped surface 6, which is adapted to abut against the first arc-shaped surface 3.

[0045] In the fuel tank filler assembly provided in this embodiment, the first arc-shaped surface 3 and the second arc-shaped surface 6 abut against each other. The two arc-shaped contact surfaces are deformed under pressure, which helps to make the first arc-shaped surface 3 and the second arc-shaped surface 6 fit more tightly.

[0046] In one embodiment, the radius of the second arcuate surface 6 is 1 mm to 1.5 mm.

[0047] For example, in some embodiments, the radius of the second arcuate surface 6 can be 1mm or 1.1mm or 1.2mm or 1.3mm or 1.4mm or 1.5mm, or it can be a range formed by any two of the above values.

[0048] In one embodiment, combined Figure 3 As shown, the installation channel assembly 5 includes an installation tube 51, the inner wall of which forms a stepped platform 511, and a sealing ring 52 is provided at the stepped platform 511. The outer peripheral wall of the oil filler port 2 is also provided with a second annular protrusion 8, which is adapted to abut the sealing ring 52 against the stepped platform 511.

[0049] In this embodiment, the fuel tank filler port assembly has a second annular protrusion 8 and a stepped platform 511 that clamp the sealing ring 52 to prevent fuel from leaking from the gap between the filler port 2 and the mounting pipe 51.

[0050] Specifically, the sealing ring 52 is disposed on the side of the stepped platform 511 facing the mounting hole and abuts against the end face of the stepped platform 511. Along the radial direction of the mounting pipe 51, the sealing ring 52 abuts against the inner wall of the mounting pipe 51 and the outer wall of the filler neck 2, respectively. The sealing ring 52 is used to seal the gap between the inner wall of the mounting pipe 51 and the outer wall of the filler neck 2 to prevent fuel leakage. The second annular protrusion 8 is disposed around the circumference of the filler neck 2. After the filler neck 2 is installed in place, the second annular protrusion 8 is located on the side of the sealing ring 52 facing the mounting hole and directly or indirectly presses the sealing ring 52 against the stepped platform 511.

[0051] In one embodiment, combined Figure 3 As shown, an abutment ring 53 is also provided between the second annular protrusion 8 and the sealing ring 52. The second annular protrusion 8 abuts against the sealing ring 52 via the abutment ring 53, and the abutment ring 53 abuts against the outer wall of the oil filling port 2 and the inner wall of the installation pipe 51 respectively.

[0052] The fuel tank filler port assembly provided in this embodiment has an abutment ring 53 between the sealing ring 52 and the second annular protrusion 8. The abutment ring 53 abuts against the outer wall of the filler port 2 and the inner wall of the mounting pipe 51, so that the abutment ring 53 and the sealing ring 52 form a double seal, which helps to improve the sealing effect.

[0053] Specifically, the abutment ring 53 is fitted onto the filler port 2 to form a double seal with the sealing ring 52. Along the axial direction of the mounting tube 51, both ends of the abutment ring 53 abut against the second annular protrusion 8 and the sealing ring 52, respectively. Along the radial direction of the mounting tube 51, the abutment ring 53 abuts against the outer wall of the filler port 2 and the inner wall of the mounting tube 51, respectively. The abutment ring 53 includes a rubber sealing ring or a metal sealing ring, etc.

[0054] In one embodiment, combined Figure 3 As shown, a clamp 54 is also provided on the wall of the mounting tube 51. The clamp 54 is located on the side of the second annular protrusion 8 facing the mounting hole. The first end of the clamp 54 is connected to the mounting tube 51, and the second end is adapted to press against the outer wall of the oil filler 2 and has a tendency to move towards the inside of the oil filler 2.

[0055] The fuel tank filler assembly provided in this embodiment has a first end of the gripper 54 connected to the mounting tube 51, and a second end abutting against the outer wall of the filler 2. It also has a tendency to move towards the axis of the filler 2 so as to pull the filler 2 down by friction, thereby keeping the first arc-shaped surface 3 and the first annular protrusion 4 in contact.

[0056] Specifically, after the filler neck 2 is installed in place, the gripper 54 is located on the side of the second annular protrusion 8 facing the mounting hole. The number of grippers 54 can be one or more; preferably, there are multiple grippers 54, evenly spaced along the circumference of the mounting tube 51. The first end of the gripper 54 can be integrally connected to the wall of the mounting tube 51, and its elastic deformation allows the second end of the gripper 54 to press against the outer wall of the filler neck 2, with a tendency to move towards the interior of the filler neck 2. Alternatively, the first end of the gripper 54 can be connected to the wall of the mounting tube 51 via a torsion spring, and the elastic force of the torsion spring allows the second end of the gripper 54 to press against the outer wall of the filler neck 2, with a tendency to move towards the interior of the filler neck 2.

[0057] In one embodiment, combined Figure 1 As shown, there are three grippers 54, which are equidistant from each other along the circumference of the pipe wall.

[0058] The fuel tank filler neck assembly provided in this embodiment has three clamps 54 that are equidistantly spaced to improve the force balance of the filler neck 2.

[0059] In one embodiment, combined Figure 3As shown, a sliding contact surface 541 is provided at the edge of the second end of the gripper 54 near the mounting hole. The sliding contact surface 541 is an arc surface or a straight inclined surface, so as to facilitate the gripper 54 to make way for the oil filling port 2 during the process of inserting the mounting tube 51 into the oil filling port.

[0060] The fuel tank filler port assembly provided in this embodiment, by setting a sliding contact surface 541, during the process of inserting the filler port 2 into the installation tube 51, the filler port 2 presses against the sliding contact surface 541, thereby driving the second end of the clamp 54 to move away from the filler port 2, thus making room for the installation of the filler port 2 and improving the ease of installation.

[0061] Specifically, during the insertion of the filler port 2 into the mounting tube 51, the second end of the filler port 2 first presses against the sliding contact surface 541, causing the second end of the clamp 54 to move away from the filler port 2 to a position where it can pass through. After the end face of the second end of the filler port 2 passes through, the second end of the clamp 54 remains pressed against the outer peripheral wall of the filler port 2. Furthermore, the side of the second annular protrusion 8 facing the sealing ring 52 is constructed as an arc-shaped surface or a straight inclined surface to improve the smoothness of its sliding contact with the sliding contact surface 541. As a feasible implementation, after the filler port 2 is installed in place, the second end of the clamp 54 abuts against the side of the second annular protrusion 8 away from the sealing ring 52.

[0062] In one embodiment, combined Figure 3 and Figure 4 As shown, the outer wall of the second end of the filler port 2 is conical, and the outer diameter of the second end of the filler port 2 gradually decreases along the oil inlet direction.

[0063] The fuel tank filler port assembly provided in this embodiment has a tapered outer wall at the second end of the filler port 2, which facilitates smoother contact and sliding with the sliding contact surface 541 during the installation of the filler port 2.

[0064] Specifically, the outer wall of the second end of the filler port 2 is tapered to form a conical surface 7, which is used to improve the smoothness of the sliding contact between the second end of the filler port 2 and the sliding contact surface 541 during the process of inserting the filler port 2 into the installation pipe 51.

[0065] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A fuel tank filler neck assembly, characterized in that, include: The fuel tank housing (1) is provided with mounting holes, and the junction of the mounting holes and the outer wall of the fuel tank housing (1) is provided with a first arc-shaped surface (3); The filler port (2) is tubular and is located in the mounting hole. The first end of the filler port (2) extends out of the mounting hole. The peripheral wall of the filler port (2) is integrally formed with a first annular protrusion (4). The first annular protrusion (4) abuts against the first arc-shaped surface (3) and forms a weld, which is suitable for welding the weld. The mounting channel assembly (5) is disposed inside the oil tank housing (1) corresponding to the mounting hole, and the second end of the filling port (2) is sealed inside the mounting channel assembly (5).

2. The fuel tank filler neck assembly according to claim 1, characterized in that, The radius of the first arc-shaped surface (3) is 3 mm to 4 mm.

3. The fuel tank filler neck assembly according to claim 1, characterized in that, The outer edge of the first annular protrusion (4) is provided with a second arc-shaped surface (6), which is adapted to abut against the first arc-shaped surface (3).

4. The fuel tank filler neck assembly according to claim 3, characterized in that, The radius of the second arc-shaped surface (6) is 1 mm to 1.5 mm.

5. The fuel tank filler neck assembly according to any one of claims 1 to 4, characterized in that, The installation channel assembly (5) includes an installation tube (51), the inner wall of which is formed with a stepped platform (511), a sealing ring (52) is provided at the stepped platform (511), and the outer peripheral wall of the oil filling port (2) is also provided with a second annular protrusion (8), which is adapted to abut the sealing ring (52) against the stepped platform (511).

6. The fuel tank filler neck assembly according to claim 5, characterized in that, An abutment ring (53) is also provided between the second annular protrusion (8) and the sealing ring (52). The second annular protrusion (8) abuts against the sealing ring (52) via the abutment ring (53), and the abutment ring (53) abuts against the outer wall of the oil filling port (2) and the inner wall of the mounting pipe (51) respectively.

7. The fuel tank filler neck assembly according to claim 5, characterized in that, The mounting tube (51) is also provided with a clamp (54) on its wall. The clamp (54) is located on the side of the second annular protrusion (8) facing the mounting hole. The first end of the clamp (54) is connected to the mounting tube (51), and the second end is adapted to abut against the outer wall of the filler port (2) and has a tendency to move toward the inside of the filler port (2).

8. The fuel tank filler neck assembly according to claim 7, characterized in that, The number of grippers (54) is three, and the three grippers (54) are equidistantly spaced along the circumference of the pipe wall.

9. The fuel tank filler neck assembly according to claim 7, characterized in that, The second end of the gripper (54) is provided with a sliding contact surface (541) near the edge of the mounting hole. The sliding contact surface (541) is an arc surface or a straight surface, which is suitable for driving the gripper (54) to make way for the oil filling port (2) during the process of inserting the oil filling port into the mounting tube (51).

10. The fuel tank filler neck assembly according to claim 9, characterized in that, The outer wall of the second end of the filler port (2) is conical, and the outer diameter of the second end of the filler port (2) gradually decreases along the oil inlet direction.

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