Oil filler cap assembly and vehicle
By setting an axial constraint fit structure and a circumferential limiting structure between the rotating shaft and the rotating arm, the problem of the wobbling of the filler cap is solved, ensuring the normal opening and closing of the filler cap and avoiding opening difficulties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-05-19
AI Technical Summary
The axial assembly gap between the plastic filler cap and the filler box causes the filler cap to have vertical freedom relative to the filler box, resulting in abnormal shaking. At the same time, if the gap is too small, it may be difficult to open.
An axial constraint fit structure is set between the rotating shaft and the rotating arm, including a limiting part and a fitting part. The axial movement of the rotating arm is restricted by the axial contact between the limiting surface and the fitting surface. Combined with the circumferential limiting structure and stress relief groove, the movement clearance of the cap is controlled.
This solved the problem of the fuel filler cap shaking, while ensuring the cap can be opened and closed normally, avoiding difficulties in opening it.
Smart Images
Figure CN224256451U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle technology, and in particular to a fuel filler cap assembly and a vehicle. Background Technology
[0002] With the widespread use of plastic fuel filler caps in the automotive industry, their structural defects are becoming increasingly apparent: To ensure smooth assembly and opening of the fuel filler cap and fuel filler housing, a certain axial assembly gap exists between the cap and the housing (relative to the vertical direction of the vehicle body). However, this axial assembly gap can also cause the cap to have vertical freedom relative to the housing, leading to abnormal wobbling. If the gap is made too small, there may be significant interference between the cap and the base, resulting in difficulty in opening. Utility Model Content
[0003] The main purpose of this utility model is to propose a fuel filler cap assembly and vehicle, which aims to solve the problem that the fuel filler cap is prone to shaking relative to the fuel filler box body due to the existence of axial assembly clearance without affecting the normal opening and closing of the cap.
[0004] To achieve the above objectives, the present invention provides a fuel filler cap assembly comprising:
[0005] The oil outlet box includes a box body and a mounting part connected to the box body, wherein the mounting part is provided with mounting holes;
[0006] A lid for covering the box body, the lid including a cover body and a rotating arm connected to the cover body, the rotating arm having a shaft hole; and
[0007] A rotating shaft passes through the mounting hole and the shaft hole, and the rotating arm is rotatably connected to the mounting part via the rotating shaft;
[0008] The rotating shaft and the rotating arm are provided with an axial constraint fit structure; the axial constraint fit structure is used to limit the displacement of the rotating arm along the axial direction of the rotating shaft.
[0009] In one embodiment, the mounting portion has a mounting cavity communicating with the mounting hole; the rotating arm portion is disposed within the mounting cavity, the rotating shaft has a shaft portion, the shaft portion passing through the mounting hole and the shaft hole in sequence, and the axial constraint fit structure includes:
[0010] A limiting part is provided on the shaft portion, the limiting part having a limiting surface;
[0011] A mating portion is provided on the inner wall of the shaft hole, and the mating portion has a mating surface;
[0012] The limiting surface and the mating surface are in axial contact, thereby restricting the upward movement of the rotating arm along the axial direction of the rotating shaft.
[0013] In one embodiment, the limiting portion has a first guide slope inclined along the insertion direction; the mating portion has a second guide slope whose shape is complementary to the first guide slope.
[0014] When the rotating shaft is assembled, the setting height of the limiting part on the rotating shaft is higher than the setting height of the mating part in the shaft hole, and the limiting surface is located above the mating surface.
[0015] In one embodiment, a radially recessed stress relief groove is provided on the outer peripheral wall of the shaft portion. The stress relief groove is adjacent to the axial constraint fit structure in the circumferential direction of the shaft portion, and its radial projection length is greater than the projection length of the axial constraint fit structure.
[0016] In one embodiment, the radial recess depth of the stress relief groove is less than the radius of the shaft portion.
[0017] In one embodiment, the stress relief groove extends axially and has a length greater than or equal to half the length of the shaft portion.
[0018] In one embodiment, there are two stress relief grooves, which are symmetrically distributed at 180° with the axis of the shaft as the center.
[0019] In one embodiment, a circumferential limiting structure is provided between the rotating shaft and the rotating arm to limit the relative rotation of the rotating shaft and the rotating arm in the circumferential direction.
[0020] In one embodiment, the circumferential limiting structure includes a limiting protrusion on the rotating shaft and a limiting groove on the rotating arm; the limiting protrusion engages with the limiting groove.
[0021] In one embodiment, the filler cap assembly further includes a fixing member, and the rotating shaft has a first end and a second end opposite to each other; the second end passes through and is exposed in the mounting portion, and the exposed portion is provided with a fixing portion, the fixing member is connected to the fixing portion and abuts against the outside of the mounting portion.
[0022] In one embodiment, the first end is provided with a radially protruding stop portion, which abuts against the edge of the mounting hole.
[0023] In one embodiment, the shaft hole has a cavity and an opening communicating with the cavity, the inner diameter of the cavity is larger than the inner diameter of the opening, and the rotating arm is provided with a hollow groove communicating with the cavity.
[0024] This utility model also proposes a vehicle including the fuel filler cap assembly as described above.
[0025] The technical solution of this utility model solves the problem of gaps between the rotating arm and the mounting part due to manufacturing process limitations, which causes the rotating arm to move axially along the rotating shaft after opening, resulting in wobbling of the cover. By using the weight of the cover itself and the axial constraint structure to limit the movement between the cover and the oil port box, the movement gap between the cover and the oil port box is controlled. This not only solves the problem of the cover wobbling up and down, but also ensures that the cover will not be difficult to open. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1 A schematic diagram of a structure of an embodiment of the fuel filler cap assembly provided by this utility model;
[0028] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0029] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0030] Figure 4 This is a schematic diagram of a structural embodiment after the rotating arm and rotating shaft are assembled.
[0031] Explanation of icon numbers:
[0032] 10. Oil port housing; 11. Housing section; 12. Mounting section; 121. Mounting cavity; 122. Mounting hole;
[0033] 20. Cover; 21. Cover body; 22. Rotating arm; 221. Shaft hole; 221a. Hole; 222. Fitting part; 222a. Fitting surface; 222b. Second guide slope; 223. Hollowed-out groove; 23. Limiting groove; 24. Stress relief groove;
[0034] 30. Rotating shaft; 30a. First end; 30b. Second end; 30c. Fixing part; 30d. Stop part; 31. Shaft part; 32. Limiting part; 321. Limiting surface; 322. First guide slope; 33. Limiting protrusion;
[0035] 40. Axial constraint fit structure;
[0036] 50. Circumferential limiting structure;
[0037] 60. Fasteners.
[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0042] With the widespread use of plastic fuel filler caps in the automotive industry, their structural defects are becoming increasingly apparent: To ensure smooth assembly and opening of the fuel filler cap and fuel filler housing, a certain axial assembly gap exists between the cap and the housing (relative to the vertical direction of the vehicle body). However, this axial assembly gap can also cause the cap to have vertical freedom relative to the housing, leading to abnormal wobbling. If the gap is made too small, there may be significant interference between the cap and the base, resulting in difficulty in opening.
[0043] This utility model proposes a refueling port cap assembly that solves the problem of the refueling port cap easily wobbling relative to the refueling box body due to the existence of axial assembly clearance, without affecting the normal opening and closing of the cap.
[0044] Please see Figure 1 The filler cap assembly includes a filler cap body 10, a cap 20, and a rotating shaft 30.
[0045] The oil port housing 10 includes a housing portion 11 and a mounting portion 12 connected to the housing portion 11. In this embodiment, the oil port housing 10 is mounted on the vehicle body, and the oil port housing 10 is recessed into the vehicle body to form a cavity and an oil port disposed in the cavity; in other embodiments, the oil port housing may also be a separate part.
[0046] The cover 20 includes a cover body 21 and a rotating arm 22 connected to the cover body 21. The rotating arm 22 and the cover body 21 are integrally formed by injection molding. The cover body 21 fits against the edge of the box cavity and has a locking structure. Users can lock or unlock the cover body 21 to the oil port box 10 by pressing or other means. The cover body 21 covers the box cavity and is flush with the outer surface of the vehicle body, which serves to protect and enhance the appearance.
[0047] The shape of the oil outlet box 10 is oval, round, or square, etc.
[0048] The rotating arm 22 is connected to the mounting part 12 via a rotating shaft 30. The rotating arm 22 can rotate relative to the mounting part 12 to expose or cover the oil port box 10. When the cover part 21 is away from the box part 11, the user can refuel the vehicle through the oil port.
[0049] Combination Figure 2 In this embodiment, the mounting part 12 has a mounting cavity 121 and a mounting hole 122 that passes through the mounting cavity 121 along the direction of the rotating shaft 30; the rotating arm part 22 is disposed in the mounting cavity 121, and the rotating shaft 30 passes through the mounting hole 122 and the shaft hole 221 in sequence, and the rotating arm part 22 is C-shaped; in other embodiments, the mounting part 12 and the rotating arm part 22 may also be stacked; or the mounting part 12 may have a mounting groove, and the rotating arm part 22 may be arranged in the mounting groove, etc.
[0050] Specifically, the rotating arm 22 is provided with a shaft hole 221 through which the rotating shaft 30 passes; the shaft hole 221 penetrates the rotating arm 22 and forms a cavity 221a inside the rotating arm 22. In order to prevent the rotating arm 22 from swaying along the axial direction of the rotating shaft 30, an axial constraint fit structure 40 is provided between the rotating shaft 30 and the rotating arm 22; when the rotating shaft 30 is assembled in the shaft hole 221, the axial constraint fit structure 40 restricts the displacement of the rotating arm 22 along the axial direction of the rotating shaft 30.
[0051] In this embodiment, the axial constraint fit structure 40 includes a limiting part 32 provided on the shaft part 31 and a fitting part 222 provided on the inner wall of the shaft hole 221; the limiting part 32 protrudes radially from the outer peripheral wall of the shaft part 31, in conjunction with reference to... Figure 3 A step is formed between the limiting part 32 and the shaft part 31. The limiting part 32 has a limiting surface 321. Similarly, the mating part 222 has a mating surface 222a. The limiting surface 321 and the mating surface 222a are in axial contact, thereby restricting the rotating arm part 22 from moving upward along the rotating shaft 30.
[0052] It should be noted that at this time, the mating part 222 can restrict the upward movement of the limiting part 32 in the axial direction, or the downward movement, or the vertical movement, so as to prevent the rotating arm part 22 from easily swaying axially due to the gap between it and the mounting part 12.
[0053] The limiting part 32 and the mating part 222 form a bidirectional interference surface in the axial direction of the rotating shaft 30 through the physical structure. When the cover part 21 moves away from the box part 11, the rotating arm part 22 is not easy to move upward in the axial direction due to the action of gravity and the restriction of the limiting part 32, thereby solving the problem that the rotating arm part 22 is prone to axial shaking due to the gap between it and the mounting part 12.
[0054] In other embodiments, the axial constraint fit structure 40 is provided with an integrally formed annular shoulder on the shaft part 31 of the rotating shaft 30, and after assembly, the two sides of the shoulder abut against the two end faces of the rotating arm part 22 respectively; or an annular groove is opened on the rotating shaft 30, and E-type retaining rings or C-type buckles are installed on both sides of the rotating arm part 22 respectively; or the shaft hole 221 of the rotating arm part 22 is designed with a central diameter reduction structure, and after assembly, the diameter reduction section forms an axial constraint with the neck of the rotating shaft 30.
[0055] The technical solution of this utility model solves the problem of a gap between the rotating arm 22 and the mounting part 12 due to manufacturing process limitations. This gap causes the rotating arm 22 to move axially along the rotating shaft 30 after opening, resulting in the cover 21 shaking. The axial constraint structure 40 between the rotating shaft 30 and the rotating arm 22 solves the problem of the cover 20 shaking vertically and ensures that the cover 20 does not have difficulty opening.
[0056] Please continue to refer to Figure 3Specifically, for ease of manufacturing and assembly, the limiting part 32 and the mating part 222 are triangular. The limiting part 32 has a first guide slope 322 inclined along the through-path direction; the mating part 222 has a second guide slope 222b that is complementary in shape to the first guide slope 322. When the rotating shaft 30 is assembled in place, the setting height of the limiting part 32 on the rotating shaft 30 is higher than the setting height of the mating part 222 in the shaft hole 221; the limiting surface 321 is located above the mating surface 222a.
[0057] The rotating shaft 30 passes through the mounting part 12 and the rotating arm part 22 in sequence. When the limiting part 32 and the mating part 222 come into contact, the first guide slope 322 and the second guide slope 222b form a wedge fit. When the rotating shaft 30 is assembled in place, the limiting part 32 is located above the mating part 222. Thus, when the rotating arm moves axially upward relative to the mounting part 12, the limiting surface 321 of the limiting part 32 abuts against the mating surface 222a of the mating part 222, thereby constraining the axial movement of the rotating arm part 22.
[0058] Please refer to Figure 4 ,from Figure 4 As can be seen, the rotating arm 22 is C-shaped and is connected to the cover 21 in the direction away from the rotating shaft 30. Furthermore, in order to facilitate the alignment of the limiting part 32 and the assembly part and to prevent the limiting part 32 and the assembly part from separating due to the rotation of the rotating shaft 30 relative to the rotating arm 22, a circumferential limiting structure 50 is provided between the rotating shaft 30 and the rotating arm 22 so that the rotating shaft 30 and the rotating arm 22 rotate together relative to the mounting part 12.
[0059] In this embodiment, the circumferential limiting structure 50 includes a limiting protrusion 33 on the rotating shaft 30 and a limiting groove 23 on the rotating arm portion 22; the limiting protrusion 33 is engaged with the limiting groove 23 to restrict relative circumferential rotation, and the circumferential limiting structure 50 is disposed between the rotating shaft 30 and the rotating arm portion 22 to eliminate the degree of freedom of circumferential rotation of the two, so that the rotating shaft 30 and the rotating arm portion 22 remain synchronized during rotation, and prevent the failure of the fit between the limiting portion 32 and the assembly portion due to relative rotation.
[0060] Specifically, the limiting protrusion 33 has a trapezoidal cross-section, which is wider near the end of the rotating shaft 30, that is, it is gradually narrowed along the insertion direction. The height of the limiting protrusion 33 is about 1 / 4 to 1 / 3 of the length of the rotating arm 22. Figure 4 The limiting groove 23 is designed to be through, and the limiting groove 23 is slightly larger than the limiting protrusion 33 so that the limiting protrusion 33 can be inserted.
[0061] When the rotating shaft 30 is inserted into the shaft hole 221, the limiting protrusion 33 is inserted into the limiting groove 23. After the second end 30b of the shaft part 31 is inserted into the shaft hole 221, the first guide slope 322 contacts the second guide slope 222b, and then a radial component force is generated to cause the shaft part 31 to undergo elastic deformation. When the rotating shaft 30 is assembled in place, the setting height of the limiting part 32 on the rotating shaft 30 is higher than the setting height of the mating part 222 in the shaft hole 221, and the limiting surface 321 is located above the mating surface 222a.
[0062] Because of the presence of the limiting part 32 and the mating part 222, a clicking feedback will be generated during assembly. At this time, the rotating shaft 30 is assembled in place, and the limiting surface 321 is located above the mating surface 222a.
[0063] In addition, the convex-concave structure between the limiting protrusion 33 and the limiting groove 23 can also form a foolproof effect, that is, a one-way assembly channel (it can only be pressed in when the protrusion is aligned with the groove entrance), avoiding assembly angle errors.
[0064] Specifically, on the upper limit protrusion 33 and the limiting part 32 on opposite sides of the shaft part 31, in the height direction, the limiting part 32 is located above the limiting protrusion 33, that is, the limiting protrusion 33 is close to the first end 30a of the shaft part 31, and the limiting part 32 is close to the middle of the shaft part 31.
[0065] In other embodiments, a circumferential limiting structure 50 may be provided between the mounting part 12 and the rotating shaft 30, such as a limiting groove 23 or a limiting protrusion 33 provided in the mounting part 12, and another structure provided in the rotating shaft 30; thus, the relative positions of the limiting part 32 and the mating part 222 can be determined because of the limitation of the limiting protrusion 33 and the limiting groove 23.
[0066] Understandably, the protrusion length of the limiting protrusion 33 on the outer wall of the rotating shaft 30 in the radial direction is not greater than that of the shaft hole 221, that is, it does not interfere with the shaft hole 221, so as to avoid affecting the assembly of the rotating shaft 30.
[0067] In other embodiments, the circumferential limiting structure 50 may also be a polygonal shaft / spline or the like, such as the shaft 30 having a D-shaped / hexagonal cross section, and the shaft hole 221 of the rotating arm 22 matching the same polygonal contour; or, it may be limited by a cylindrical pin that radially penetrates the shaft 30 and the rotating arm 22; or, the shaft 31 may be provided with an axial spline, and the inner wall of the shaft hole 221 may be provided with a corresponding keyway, etc.
[0068] Combined with reference Figure 2 , Figure 3 and Figure 4Furthermore, the axial constraint fit structure 40 will cause the shaft part 31 to deform. In order to improve the deformation capacity of the shaft part 31 and ensure the strength of the shaft part 31, a radially recessed stress relief groove 24 is provided on the outer peripheral wall of the shaft part 31. The stress relief groove 24 is adjacent to the axial constraint fit structure 40 and its radial projection covers the assembly trajectory area of the axial constraint fit structure 40.
[0069] In this embodiment, the rotating shaft 30 is a plastic part. When the limiting part 32 and the mating part 222 abut, the shaft part 31 will deform. In order to avoid excessive stress during the installation of the rotating shaft 30, which may cause the rotating shaft 30 to break, a radially recessed stress relief groove 24 is provided on the outer wall of the shaft part 31. In order to assist the limiting part in passing through the mating part 222, the stress relief groove 24 is adjacent to the axial constraint mating structure 40. That is, the stress relief groove 24 is located next to the limiting part 32 in the circumferential direction on the outer wall of the shaft part 31. Specifically, there are two stress relief grooves 24, which are symmetrically distributed at 180° with the axis of the shaft part 31 as the center. The two stress relief grooves 24 can also be connected and hollow, but this will weaken the torsional strength of the shaft. Therefore, the stress relief groove 24 is preferably a non-through groove (partially recessed) to meet the deformation requirements.
[0070] It should be noted that the assembly trajectory area of the radial projection covering the axial constraint mating structure 40 refers to the path length from the contact between the first guide slope 322 and the second guide slope 222b to the limiting surface 321 located above the mating surface 222a, so that the assembly resistance is reduced by local deformation when the shaft part 31 is compressed.
[0071] Specifically, the radial recess depth of the stress relief groove 24 is less than the radius of the shaft portion 31, and a non-through groove (partial recess) can meet the deformation requirements.
[0072] Specifically, the stress relief groove 24 extends axially and its length is greater than or equal to half the length of the shaft part 31. By increasing the length, the strength of the shaft part 31 is ensured, while the shaft part 31 is made easier to deform. That is, when the shaft part 31 is under pressure, the assembly resistance is reduced through local deformation.
[0073] Reference Figure 2 Furthermore, the rotating shaft 30 has a first end 30a and a second end 30b opposite to each other; the first end 30a and / or the second end 30b are provided with an axial limiting structure, which forms an abutting fit with the outer side of the mounting part 12.
[0074] In this embodiment, the first end 30a is provided with a radially protruding stop portion 30d. The equivalent area of the stop portion 30d is larger than the equivalent area of the mounting hole 122. The stop portion 30d abuts against the outer side of the mounting portion 12. The radius of the stop portion 30d is larger than that of the shaft portion 31. The abutting fit between the stop portion 30d and the outer side of the mounting portion 12 can also restrict the upward movement of the rotating shaft 30.
[0075] Specifically, the filler cap assembly also includes a fixing member 60, with its second end 30b passing through and exposed in the mounting portion 12. The exposed portion is provided with a fixing portion 30c. The fixing member 60 is connected to the fixing portion 30c. The fixing member 60 and the fixing portion 30c are configured as an axial limiting mechanism. The fixing member 60 is configured as a retaining ring and is engaged with the fixing portion 30c. Through the action of the stop portion 30d and the retaining ring, the pin is axially limited relative to the mounting portion 12, making it difficult to move axially, and further restricting the axial sway of the swing arm portion 22 relative to the mounting portion 12.
[0076] In other embodiments, a fixing member 60 may be provided at the first end 30a. The fixing member 60 may be a pin or a retaining ring, which allows the limiting surface 321 to better restrict the mating surface 222a and further restricts the axial sway of the rotating arm 22 relative to the mounting part 12.
[0077] Furthermore, for ease of manufacturing and processing, refer to Figure 2 and Figure 3 The shaft hole 221 has a cavity 221a, which penetrates the rotating arm portion 22. The rotating arm portion 22 forms the cavity 221a and an opening communicating with the cavity 221a (i.e., holes at both ends of the rotating arm portion 22 through which the rotating shaft 30 passes). Figure 4 The rotating arm 22 is provided with a hollow groove 223, which connects to the cavity 221a. The inner diameter of the cavity 221a is larger than the inner diameter of the opening. The axial limiting mechanism is exposed through the hollow groove 223, which facilitates processing and allows for adjustments when assembly problems occur.
[0078] Specifically, the limiting groove 23 is connected to the cavity 221a and the hollow groove 223 so that the limiting part 32 can pass through the opening. The inner diameter of the cavity 221a is larger than the opening, which facilitates the installation of the limiting part 32 and the mating part 222 and avoids interference during installation.
[0079] This utility model also proposes a vehicle, which includes a body and a fuel filler cap assembly. The specific structure of the fuel filler cap assembly is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the fuel filler cap body 10 is installed on the vehicle body, and the fuel filler cap body 10 is recessed into the body to form a cavity and a fuel filler cap disposed in the cavity.
[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.
Claims
1. A fuel filler cap assembly, characterized in that, include: The oil outlet box includes a box body and a mounting part connected to the box body, wherein the mounting part is provided with mounting holes; A lid for covering the box body, the lid including a cover body and a rotating arm connected to the cover body, the rotating arm having a shaft hole; and A rotating shaft passes through the mounting hole and the shaft hole, and the rotating arm is rotatably connected to the mounting part via the rotating shaft; The rotating shaft and the rotating arm are provided with an axial constraint fit structure; the axial constraint fit structure is used to limit the displacement of the rotating arm along the axial direction of the rotating shaft.
2. The fuel filler cap assembly as described in claim 1, characterized in that, The mounting portion has a mounting cavity communicating with the mounting hole; the rotating arm portion is disposed within the mounting cavity, the rotating shaft has a shaft portion, the shaft portion passing through the mounting hole and the shaft hole in sequence, and the axial constraint fit structure includes: A limiting part is provided on the shaft portion, the limiting part having a limiting surface; A mating portion is provided on the inner wall of the shaft hole, and the mating portion has a mating surface; The limiting surface and the mating surface are in axial contact, thereby restricting the upward movement of the rotating arm along the axial direction of the rotating shaft.
3. The fuel filler cap assembly as described in claim 2, characterized in that, The limiting part has a first guide slope inclined along the insertion direction; the mating part has a second guide slope whose shape is complementary to the first guide slope. When the rotating shaft is assembled, the setting height of the limiting part on the rotating shaft is higher than the setting height of the mating part in the shaft hole, and the limiting surface is located above the mating surface.
4. The fuel filler cap assembly as described in claim 2, characterized in that, The outer peripheral wall of the shaft is provided with a radially recessed stress relief groove. The stress relief groove is adjacent to the axial constraint fit structure in the circumferential direction of the shaft and the radial projection length of the shaft is greater than the projection length of the axial constraint fit structure.
5. The fuel filler cap assembly as described in claim 4, characterized in that, The radial recess depth of the stress relief groove is less than the radius of the shaft portion; and / or, The stress relief groove extends axially and its length is greater than or equal to half the length of the shaft portion; and / or, there are two stress relief grooves, which are symmetrically distributed at 180° with the shaft portion axis as the center.
6. The fuel filler cap assembly as described in claim 1, characterized in that, A circumferential limiting structure is provided between the rotating shaft and the rotating arm to limit the relative rotation of the rotating shaft and the rotating arm in the circumferential direction.
7. The fuel filler cap assembly as described in claim 6, characterized in that, The circumferential limiting structure includes a limiting protrusion on the rotating shaft and a limiting groove on the rotating arm; the limiting protrusion engages with the limiting groove.
8. The fuel filler cap assembly as described in claim 1, characterized in that, The filler cap assembly also includes a fixing member, and the rotating shaft has a first end and a second end opposite to each other; the second end passes through and is exposed in the mounting part, and the exposed part is provided with a fixing part, the fixing member is connected to the fixing part and abuts against the outside of the mounting part.
9. The fuel filler cap assembly as described in claim 8, characterized in that, The first end is provided with a radially protruding stop portion, which abuts against the edge of the mounting hole. And / or, the shaft hole has a cavity and an opening communicating with the cavity, the inner diameter of the cavity is larger than the inner diameter of the opening, and the rotating arm is provided with a hollow groove communicating with the cavity.
10. A vehicle, characterized in that, Includes the filler cap assembly as described in any one of claims 1 to 9.