Bending stress resistant structure of plastic fuel tank

Abstract

The embodiment of the utility model discloses a bending stress resisting structure of a plastic fuel tank. According to one specific implementation mode of the method, the bending stress resisting structure of the plastic fuel tank comprises a bending stress resisting body and connecting bases, the bending stress resisting body comprises falling-off protection structures and bending stress resisting columns, and the bending stress resisting body only bears axial tension; each falling-off protection structure corresponds to each connecting base, the falling-off protection structure in each falling-off protection structure is connected with the corresponding connecting base, the falling-off protection structure in each falling-off protection structure can fall off from the connected connecting base, and each falling-off protection structure can rotate in the connected connecting base. According to the embodiment, the situation that the bending stress resisting structure of the plastic fuel tank bears large bending stress can be reduced, the situation that one side between the supporting column and the fuel tank is broken is reduced, the strength of the supporting column is improved, the supporting effect on the fuel tank is improved, and the situation that the fuel tank is damaged is reduced.

Description

Technical Field

[0001] Embodiments of this disclosure relate to the field of vehicle plastic fuel tanks, and more specifically to a flexural stress-resistant structure for plastic fuel tanks. Background Technology

[0002] The plastic fuel tank anti-bending stress structure placed inside the fuel tank in the vehicle can support the fuel tank. Currently, in the support column structure placed inside the fuel tank, the connection between the support column body and the connecting base (flange) is a rigid connection.

[0003] However, when the connection between the support column body and the connecting base (flange) in the support column structure placed inside the fuel tank is a rigid connection, the following technical problems often occur:

[0004] When the fuel tank expands and deforms, the deformation of the surrounding box of the support column is different. Since the support column body and the connecting base are rigidly connected, the support column bears a large tensile force on the upper and lower sides of the fuel tank and a large bending stress. This can cause a unilateral fracture between the support column and the fuel tank, resulting in damage to the fuel tank. In addition, the support column has low strength, resulting in poor stability of the support column body and easy material fatigue, leading to a short lifespan of the support column body.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background of the inventive concept, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] The summary portion of this disclosure is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description portion. This summary portion is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0007] Some embodiments of this disclosure propose a flexural stress-resistant structure for plastic fuel tanks to address one or more of the technical problems mentioned in the background section above.

[0008] In a first aspect, some embodiments of this disclosure provide a bending stress-resistant structure for a plastic fuel tank. This bending stress-resistant structure includes a bending stress-resistant main body and various connecting bases. The bending stress-resistant main body includes various detachment protection structures and bending stress-resistant columns. The bending stress-resistant main body only bears axial tensile force. Each detachment protection structure corresponds to a connecting base in the connecting bases. The detachment protection structures are connected to their respective connecting bases and are detachable from the connected connecting bases. Each detachment protection structure is rotatable within the connected connecting bases.

[0009] Optionally, the detachment protection structure in each of the above-mentioned detachment protection structures is a sphere.

[0010] Optionally, the aforementioned flexural stress-resistant body is manufactured by an integral molding process.

[0011] Optionally, all of the above-mentioned connecting bases are manufactured by a secondary injection molding process.

[0012] Optionally, each of the above-mentioned detachment protection structures is a solid structure.

[0013] Optionally, the aforementioned bending stress-resistant column is a weight-reduced structure, and the aforementioned bending stress-resistant column includes at least one reinforcing rib.

[0014] Optionally, each of the aforementioned connecting bases includes a connecting surface, and the connecting surface of each of the aforementioned connecting bases includes at least one rectangular protrusion.

[0015] Optionally, the surface of each of the above-mentioned detachment protection structures is non-smooth, and the surface of each of the above-mentioned detachment protection structures includes at least one protrusion, the protrusion of which is circular in shape. The connection method between each of the above-mentioned detachment protection structures and the corresponding connecting base is a secondary injection molding and overmolding welding method. The overmolding thickness or overmolding depth of each of the above-mentioned connecting bases is adjustable. The tensile strength resistance of the above-mentioned bending stress-resistant body can be adjusted by adjusting the overmolding thickness or overmolding depth of the above-mentioned connecting bases.

[0016] The various embodiments disclosed above have the following beneficial effects: Through the plastic fuel tank anti-bending stress structure of some embodiments of this disclosure, the bending stress on the support column can be reduced, thereby reducing the occurrence of unilateral fracture between the support column and the fuel tank, thus improving the strength of the support column, enhancing its support effect on the fuel tank, and extending the lifespan of the support column body. The reasons for the support column being subjected to large bending stress, unilateral fracture between the support column and the fuel tank, low support column strength, poor support effect on the fuel tank, and short lifespan are as follows: When the fuel tank expands and deforms, the deformation of the surrounding box body of the support column is different, and the support column body and the connecting base are rigidly connected, causing the support column to bear large tensile forces and large bending stresses on the upper and lower sides of the fuel tank. This leads to unilateral fracture between the support column and the fuel tank, resulting in damage to the fuel tank. Furthermore, the low strength of the support column results in poor stability of the support column body and makes the support column body prone to material fatigue, leading to a short lifespan. Based on this, some embodiments of the plastic fuel tank anti-bending stress structure disclosed herein are characterized in that the plastic fuel tank anti-bending stress structure includes an anti-bending stress body and various connecting bases, wherein the anti-bending stress body includes various detachment protection structures and anti-bending stress columns, and the anti-bending stress body only bears axial tensile force; the detachment protection structures in the various detachment protection structures correspond to the connecting bases in the various connecting bases, and the detachment protection structures in the various detachment protection structures are connected to the corresponding connecting bases, and the detachment protection structures in the various detachment protection structures are detachable from the connected connecting bases, and the detachment protection structures are rotatable within the connected connecting bases. Because the anti-bending stress body of the plastic fuel tank anti-bending stress structure only bears axial tensile force, the bending stress on the support column is reduced, further reducing the possibility of unilateral breakage between the support column and the fuel tank, further improving the strength and stability of the support column, and extending the service life of the support column. Furthermore, because the anti-bending stress structure is not rigidly connected to the connecting base but is detachable, when the tensile force on the anti-bending stress structure exceeds its bearing capacity, the detachment protection structure included in the anti-bending stress structure can detach from the connecting base, rather than being rigidly connected. This further reduces the possibility of unilateral breakage between the support column and the fuel tank, thereby reducing fuel tank damage. Therefore, the anti-bending stress structure of the plastic fuel tank can reduce the amount of bending stress it bears, reduce the possibility of unilateral breakage between the support column and the fuel tank, improve the support effect on the fuel tank, and reduce fuel tank damage. Attached Figure Description

[0017] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and elements are not necessarily drawn to scale.

[0018] Figure 1 This is a cross-sectional view of the flexural stress-resistant structure of a plastic fuel tank according to this disclosure;

[0019] Figure 2 This is a schematic diagram of some embodiments of the plastic fuel tank anti-bending stress structure according to the present disclosure. Detailed Implementation

[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0021] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0023] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0025] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 A structural diagram of a plastic fuel tank anti-bending stress structure according to this disclosure is shown.

[0027] like Figure 1As shown, the bending stress-resistant structure of the plastic fuel tank may include a bending stress-resistant main body 1 and various connecting bases 2. The bending stress-resistant main body 1 may include various detachment protection structures 11 and bending stress-resistant columns 12. Each of the connecting bases 2 includes a connecting surface 21.

[0028] In some embodiments, the aforementioned anti-bending stress body 1 may include various detachment protection structures 11 and anti-bending stress columns 12. The aforementioned anti-bending stress body 1 can only withstand axial tensile force.

[0029] In some embodiments, the detachment protection structure 11 of each of the above-mentioned detachment protection structures 11 can correspond to the connecting base 2 of each of the above-mentioned connecting bases 2. The detachment protection structure 11 of each of the above-mentioned detachment protection structures 11 can be connected to the corresponding connecting base 2. The detachment protection structure 11 of each of the above-mentioned detachment protection structures 11 is detachable from the connected connecting base 2 and can rotate within the connected connecting base 2. The material of the bending stress-resistant body 1 can be POM or POK material, thereby reducing the weight of the plastic fuel tank. It should be noted that the material of the bending stress-resistant body 1 can be various types of high-strength materials; the specific type of high-strength material for the bending stress-resistant body 1 is not limited here. The detachment protection structure 11 can detach from the connected connecting base 2 when the tensile force exceeds the allowable range, thereby reducing tearing between the connecting base 2 and the fuel tank. Furthermore, since the detachment protection structure 11 can rotate within the connected base, the bending stress-resistant body 1 can only withstand axial tensile force. This reduces the bending stress on the plastic fuel tank's anti-bending stress structure. When manufacturing the anti-bending stress structure for the plastic fuel tank, the thickness or depth of the adhesive coating on each connecting base 2 can be determined based on the required tensile strength. This allows for adjustment of the tensile strength resistance of the anti-bending stress structure. For example, a greater adhesive coating thickness or deeper coating depth on each connecting base 2 results in a greater tensile strength resistance; conversely, a smaller adhesive coating thickness or shallower coating depth on each connecting base 2 results in a smaller tensile strength resistance.

[0030] Optionally, such as Figure 1 As shown, each of the aforementioned detachment protection structures 11 is a spherical structure. This allows each detachment protection structure 11 to detach from the connecting base 2. It should be noted that the specific shape of each detachment protection structure 11 is not limited here.

[0031] Optionally, such as Figure 1As shown, the aforementioned anti-bending stress body 1 can be prepared by an integral molding process.

[0032] Optionally, such as Figure 1 As shown, each of the aforementioned connecting bases 2 can be manufactured through a secondary injection molding process. The connecting base 2 in each of the aforementioned connecting bases 2 can be made of HDPE material. The material of the connecting base 2 in each of the aforementioned connecting bases 2 can be the same as the material of the plastic fuel tank.

[0033] Optionally, such as Figure 1 As shown, each of the above-mentioned detachment protection structures 11 can be a solid structure.

[0034] Optionally, such as Figure 1 or Figure 2 As shown, the aforementioned anti-bending stress column 12 can be a weight-reducing structure, and the aforementioned anti-bending stress column 12 may include at least one reinforcing rib. Therefore, the weight of the anti-bending stress structure of the plastic fuel tank can be reduced, thereby reducing the weight of the fuel tank.

[0035] Optionally, such as Figure 1 or Figure 2 As shown, each of the aforementioned connecting bases 2 may include a connecting surface 21, and each connecting surface 21 of each connecting base 2 may include at least one rectangular protrusion. The shape of the protrusion on the connecting surface 21 of the connecting base 2 is not limited here. For example, the protrusion may be circular. Therefore, the protrusion on the connecting surface 21 of each connecting base 2 can reinforce the connection between the connecting base 2 and the fuel tank.

[0036] Optionally, such as Figure 1As shown, the surface of each of the aforementioned detachment protection structures 11 may be non-smooth. The surface of each of the aforementioned detachment protection structures may include at least one protrusion, and the shape of the protrusion may be circular. The connection between each of the aforementioned detachment protection structures 11 and the corresponding connecting base 2 may be a secondary injection molding and overmolding method. The overmolding thickness or depth of each of the aforementioned connecting bases 2 is adjustable. The tensile strength withstand capability of the aforementioned anti-bending stress body 1 can be adjusted by adjusting the overmolding thickness or depth of the aforementioned connecting bases 2. The surface of each of the aforementioned detachment protection structures 11 may be non-smooth. This increases the friction of the surface of the detachment protection structure 11, thereby fixing the angle of the detachment protection structure 11 when it rotates in the connecting base 2, so that the aforementioned anti-bending stress body 1 only bears axial tensile force. Here, the specific shape of the at least one protrusion included on the surface of each of the aforementioned detachment protection structures 11 is not limited.

[0037] The above-described optional embodiments, as an inventive point of this disclosure, solve the technical problem that "different plastic fuel tanks require different tensile strengths from the support columns, and the use of mismatched support columns results in poor support for the plastic fuel tank and internal tearing, shortening its lifespan." The specific factors causing poor support and internal tearing of the plastic fuel tank are as follows: different plastic fuel tanks require different tensile strengths from the support columns, and the use of mismatched support columns leads to poor support or internal tearing. Solving these factors improves the compatibility between the plastic fuel tank and the support columns, reduces internal tearing, and thus reduces the shortened lifespan of the plastic fuel tank. To achieve this effect, the coating thickness or depth of each connecting base in the plastic fuel tank anti-bending stress structure of this disclosure is adjustable, thereby adjusting the tensile strength of the plastic fuel tank anti-bending stress structure and improving the fit between the plastic fuel tank and the anti-bending stress structure. Furthermore, the surface of each of the aforementioned detachment protection structures may include at least one protrusion, thereby increasing the friction between the surface of the detachment protection structure and the corresponding connecting base, reducing the likelihood of the detachment protection structure falling off the connecting base under small tensile forces, and thus enhancing the support effect of the bending stress-resistant body. The protrusions on the surface of each detachment protection structure can also fix the angle of the detachment protection structure, ensuring that the aforementioned bending stress-resistant body only bears axial tensile force, thereby enhancing the support effect of the bending stress-resistant body and reducing the likelihood of shortening the lifespan of the plastic fuel tank.

[0038] The various embodiments disclosed above have the following beneficial effects: Through the plastic fuel tank anti-bending stress structure of some embodiments of this disclosure, the bending stress on the support column can be reduced, thereby reducing the occurrence of unilateral fracture between the support column and the fuel tank, thus improving the strength of the support column, enhancing its support effect on the fuel tank, and extending the lifespan of the support column body. The reasons for the support column being subjected to large bending stress, unilateral fracture between the support column and the fuel tank, low support column strength, poor support effect on the fuel tank, and short lifespan are as follows: When the fuel tank expands and deforms, the deformation of the surrounding box body of the support column is different, and the support column body and the connecting base are rigidly connected, causing the support column to bear large tensile forces and large bending stresses on the upper and lower sides of the fuel tank. This leads to unilateral fracture between the support column and the fuel tank, resulting in damage to the fuel tank. Furthermore, the low strength of the support column results in poor stability of the support column body and makes the support column body prone to material fatigue, leading to a short lifespan. Based on this, some embodiments of the plastic fuel tank anti-bending stress structure disclosed herein are characterized in that the plastic fuel tank anti-bending stress structure includes an anti-bending stress body and various connecting bases, wherein the anti-bending stress body includes various detachment protection structures and anti-bending stress columns, and the anti-bending stress body only bears axial tensile force; the detachment protection structures in the various detachment protection structures correspond to the connecting bases in the various connecting bases, and the detachment protection structures in the various detachment protection structures are connected to the corresponding connecting bases, and the detachment protection structures in the various detachment protection structures are detachable from the connected connecting bases, and the detachment protection structures are rotatable within the connected connecting bases. Because the anti-bending stress body of the plastic fuel tank anti-bending stress structure only bears axial tensile force, the bending stress on the support column is reduced, further reducing the possibility of unilateral breakage between the support column and the fuel tank, further improving the strength and stability of the support column, and extending the service life of the support column. Furthermore, because the anti-bending stress structure is not rigidly connected to the connecting base but is detachable, when the tensile force on the anti-bending stress structure exceeds its bearing capacity, the detachment protection structure included in the anti-bending stress structure can detach from the connecting base, rather than being rigidly connected. This further reduces the possibility of unilateral breakage between the support column and the fuel tank, thereby reducing fuel tank damage. Therefore, the anti-bending stress structure of the plastic fuel tank can reduce the amount of bending stress it bears, reduce the possibility of unilateral breakage between the support column and the fuel tank, improve the support effect on the fuel tank, and reduce fuel tank damage.

[0039] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A bending stress-resistant structure for a plastic fuel tank, characterized in that, The plastic fuel tank's bending stress-resistant structure includes a bending stress-resistant main body and various connecting bases, wherein... The anti-bending stress body includes various detachment protection structures and anti-bending stress columns, and the anti-bending stress body only bears axial tensile force; Each detachment protection structure corresponds to a connecting base in each connecting base. Each detachment protection structure is connected to its corresponding connecting base. Each detachment protection structure is detachable from the connected connecting base and is rotatable within the connected connecting base.

2. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, The detachment protection structure in each of the detachment protection structures is a sphere.

3. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, The bending stress resistant body is manufactured by a one-piece molding process.

4. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, Each of the connecting bases is manufactured using a secondary injection molding process.

5. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, Each of the aforementioned detachment protection structures is a solid structure.

6. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, The bending stress-resistant column is a weight-reduced structure, and the bending stress-resistant column includes at least one reinforcing rib.

7. The anti-bending stress structure for a plastic fuel tank according to claim 1, characterized in that, Each of the connecting bases includes a connecting surface, and the connecting surface of each connecting base includes at least one rectangular protrusion.

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