Fastener, fastening assembly, riveting assembly and welding assembly

Abstract

The utility model discloses a fastener, a fastening assembly, a riveting assembly and a welding assembly. A fastener comprises a base body, a boss and a plurality of protrusions. The base body is provided with a first face, the boss protrudes out of the first face, the size of the boss is gradually reduced in the direction close to the first face so that materials can be guided to move towards the first face during riveting, and the boss and the first face can define a groove used for containing a sealing piece. The protrusions protrude out of the first face and surround the boss, during riveting, the protrusions are suitable for penetrating into the metal plate to achieve the anti-rotation effect, due to the fact that the metal plate material moves towards the groove, the anti-disengagement effect is achieved, or the sealing element is deformed to increase the sealing effect, and during welding, the protrusions play the role of being welded to the metal plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fastener, concretely relates to a fastener, fastening assembly, riveting assembly and welding assembly. BACKGROUND

[0002] In new energy vehicles, especially in the field of electric vehicles, electric drive devices, battery assemblies and the like as core components have high requirements for the leakproof performance of connection and assembly, and once the battery assembly and electric drive device have liquid or gas leakage, short circuit and the like problems will be caused, seriously affecting the safety performance of the whole vehicle. Therefore, with the development of the industry and technology, the market puts forward higher requirements for the leakproof performance of fasteners.

[0003] The existing metal usually needs to be coated with glue on the end face of the fastener to realize the leakproof function. In the prior art, the fastener comprises a base, and a plurality of protrusions formed integrally with the base extend from the base to engage with a panel for being welded to the panel by resistance welding. A groove is arranged in the base facing the panel and filled with a heat-activatable expansion sealing agent material. During resistance welding or when the base is heated in a heating furnace, the sealing agent expands to fill and seal the gap between the base and the panel. However, this technical solution has high cost, the leakproof performance is affected by welding heat, the quality is difficult to control, and it is difficult to achieve ideal effect. Specifically, 1. High cost - the glue coating process is complex and has high cost; the heat-activatable expansion sealing agent material has high cost. 2. Poor leakproof reliability - the sealing agent expands when heated during welding of the protrusions to the panel, that is, the welding heat generated at the protrusions needs to be conducted to the sealing agent, and the sealing agent needs to receive enough heat to expand to eliminate the connection gap. However, the welding heat and heat conduction efficiency are difficult to control, and factors such as uneven welding heat conduction or unstable temperature may cause different expansion degrees of the sealing material, incomplete expansion activation, and thus affect the secondary expansion activation process of the heating process. 3. Complex process - in order to ensure the leakproof sealing performance, this scheme usually needs to add an additional heating process to heat the base to ensure that the sealing agent is completely activated and expanded. The additional heating process makes the process complex and increases the cost. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the above-mentioned defects or problems in the background art or providing a material basis for solving the above-mentioned defects or problems, and providing a fastener, fastening assembly, riveting assembly and welding assembly.

[0005] To achieve the above-mentioned purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0006] Scheme one, a fastener, comprising

[0007] a base body provided with a first surface;

[0008] a boss protruding from the first surface and gradually decreasing in size along a direction close to the first surface, the boss and the first surface enclosing a groove suitable for accommodating a sealing element;

[0009] a plurality of protrusions, each protruding from the first surface and surrounding the boss.

[0010] Option II, based on Option I, the protrusions gradually decrease in size along a direction away from the first surface.

[0011] Option III, based on Option I, the protrusions extend along an outer edge of the base body to a center of the base body and are not engaged with the boss.

[0012] Option IV, based on Option I, the protrusions are shaped as quadrangular pyramids.

[0013] Option V, based on Option I, further comprising a screw rod protruding from a surface of the boss away from the first surface.

[0014] Option VI, based on Option I, further comprising a screw hole penetrating the base body and the boss along a vertical direction.

[0015] Option VII, based on Option I, defining a first direction as a direction along which an outer edge of the base body extends to a center of the base body, a second direction as a direction perpendicular to the first direction and parallel to a horizontal plane, and the protrusions being greater in size along the first direction than along the second direction.

[0016] Option VIII, a fastening assembly comprising a sealing element and a fastener as claimed in any one of Options I to VII, the sealing element being arranged in the groove enclosed by the boss and the first surface.

[0017] Option IX, a riveting assembly comprising sheet metal and a fastening assembly as claimed in Option VIII, the protrusions being adapted to pierce the sheet metal and move material of the sheet metal to the groove so that the sealing element is deformed under pressure and fills the groove together with the sheet metal.

[0018] Option X, a welding assembly comprising sheet metal and a fastener as claimed in any one of Options I to VII or a fastening assembly as claimed in Option VIII, the protrusions being adapted to be welded to the sheet metal.

[0019] As can be seen from the above description of the present application and its preferred embodiments, relative to the prior art, the technical scheme of the present application and its preferred embodiments have the following beneficial effects due to the following technical means:

[0020] 1. In Scheme 1 and its preferred embodiments, a fastener includes a base, a boss, and a plurality of protrusions. The base has a first surface, and the boss protrudes from the first surface, its size gradually decreasing along the direction close to the first surface. It has an inclined surface to guide material towards the first surface during riveting and can enclose the first surface to form a groove for accommodating a seal. Each protrusion protrudes from the first surface and surrounds the boss, suitable for inserting into sheet metal during riveting to achieve an anti-rotation effect. This causes the sheet metal material to move towards the groove, achieving anti-detachment or deforming the seal (in the case of seal installation) to increase the sealing effect. During welding, the protrusions function as welders to the sheet metal. This scheme is low-cost, reliable in preventing leakage, and simple in process. When installing the seal, there is no need to heat the seal.

[0021] 2. In Scheme 2 and its preferred embodiments, the size of the protrusion gradually decreases along the direction away from the first surface. This design helps to reduce the initial contact area between the sheet metal and the protrusion, making it easier for the protrusion to penetrate the sheet metal during riveting. At the same time, during welding, this design also facilitates arc initiation and increases the rate of change of resistance, thereby ensuring welding quality.

[0022] 3. In Scheme 3 and its preferred embodiments, the protrusion extends from the outer edge of the substrate toward the center of the substrate and does not engage with the boss, giving it a longer length in this direction, which improves the anti-rotation effect during riveting.

[0023] 4. In Scheme 4 and its preferred embodiments, the protrusion is a four-sided pyramid with a pointed tip, which makes it easier to penetrate the sheet metal or weld to the sheet metal.

[0024] 5. In Scheme 5 and its preferred embodiments, a screw is further included, which protrudes from the surface of the boss away from the first surface, and the screw has threads to achieve fastening with another object.

[0025] 6. In Scheme 6 and its preferred embodiments, a screw hole is also included, which penetrates the base and the boss in a vertical direction, and the screw hole has threads to achieve fastening with another object.

[0026] 7. In Scheme 7 and its preferred embodiments, the direction from the outer edge of the substrate to the center of the substrate is defined as the first direction, and the direction perpendicular to the first direction and parallel to the horizontal plane is defined as the second direction. The size of the protrusion along the first direction is greater than the size of the protrusion along the second direction. The protrusion is longer along the first direction, which provides better anti-rotation effect during riveting. The length of the protrusion in the second direction is smaller, which prevents problems such as difficulty in penetration or difficulty in melting.

[0027] 8. In Scheme 8 and its preferred embodiments, a fastening assembly includes a seal and the aforementioned fastener, and has the beneficial effects brought about by the aforementioned fastener. The seal is disposed within a groove formed by the boss and the first surface, so that when the sheet metal material moves into the groove, it can compress the seal, causing the seal to deform and improving the sealing performance.

[0028] 9. In a ninth aspect and preferred embodiments thereof, a riveting assembly comprising sheet metal and the fastening assembly described above, the protrusion being adapted to pierce the sheet metal and move sheet metal material into the recess to cause the seal to be deformed under compression and to fill the recess together with the sheet metal to increase the sealing effect.

[0029] 10. In a tenth aspect and preferred embodiments thereof, a welding assembly comprising sheet metal and the fastener described above or the fastening assembly described above, the protrusion being adapted to be welded to the sheet metal and to have the beneficial effects of the fastener described above. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed to be used in the embodiment description. Obviously, the drawings described in the following embodiment description are some embodiments of the present application, and other drawings can be obtained by those of ordinary skill in the art without any creative effort based on these drawings.

[0031] Figure 1 It is a perspective view of the fastener in embodiment one;

[0032] Figure 2 It is a structural schematic view of the fastener in embodiment one;

[0033] Figure 3 It is a perspective view of the fastening assembly in embodiment two;

[0034] Figure 4 It is a structural schematic view of the fastening assembly in embodiment two;

[0035] Figure 5 It is a structural schematic view of the riveting assembly in embodiment three.

[0036] Explanation of main reference signs:

[0037] Fastener 1; base 11; first face 111; boss 12; protrusion 13; recess 14; screw 15; seal 2; sheet metal 3; via 31; DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0039] In the claims, the specification, and the drawings of the present application, terms such as "first", "second", and "third" are used merely to distinguish one object or implementation from another, without necessarily implying a particular order or sequence.

[0040] In the claims, the specification, and the drawings of the present application, terms such as "first", "second", and "third" are used merely to distinguish one object or implementation from another, without necessarily implying a particular order or sequence.

[0041] In the claims, the specification, and the drawings of the present application, terms such as "first", "second", and "third" are used merely to distinguish one object or implementation from another, without necessarily implying a particular order or sequence.

[0042] In the claims, the specification, and the drawings of the present application, terms such as "first", "second", and "third" are used merely to distinguish one object or implementation from another, without necessarily implying a particular order or sequence.

[0043] Embodiment one

[0044] Reference Figures 1-4 A fastener 1 comprising a base body 11, a boss 12 and a plurality of protrusions 13. The fastener 1 can be a bolt or a nut.

[0045] Reference Figure 1 The base body 11 is provided with a first surface 111, which is the surface facing the sheet metal 3 during use. The base body 11 can be circular, or can have a quadrangular, hexagonal, octagonal or other structure.

[0046] The boss 12 is coaxially arranged with the base body 11, and protrudes from the first surface 111. The size of the boss 12 gradually decreases in the direction approaching the first surface 111. In this embodiment, the boss 12 has a tapered structure with a narrow upper part and a wide lower part. The boss 12 and the first surface 111 enclose a groove 14, which is open outward.

[0047] Reference Figure 1 , Figure 2, the protrusions 13 are arranged around the boss 12 and protrude from the first surface 111, and in this embodiment, the protrusions 13 are four and are evenly arranged. The protrusions 13 extend from the outer edge of the base body 11 to the center of the base body 11 and are not connected to the boss 12. The direction from the outer edge of the base body 11 to the center of the base body 11 is defined as the first direction (the length direction of the protrusions 13), and the direction perpendicular to the first direction and parallel to the horizontal plane is defined as the second direction (the width direction of the protrusions 13), and the size of the protrusions 13 in the first direction is greater than the size of the protrusions 13 in the second direction. The size of the protrusions 13 gradually decreases in the direction away from the first surface 111, and the protrusions 13 have a structure of being wide at the top and narrow at the bottom (wide on the side close to the base body 11), and the shape of the protrusions 13 is a quadrangular pyramid with a pointed end.

[0048] When the fastener 1 is a bolt, the fastener 1 has a screw rod 15 protruding from the surface of the boss 12 away from the first surface 111 and having external threads. The screw rod 15 is coaxial with the boss 12.

[0049] When the fastener 1 is a nut, the fastener 1 has a threaded hole with internal threads, which penetrates the base body 11 and the boss 12 in the vertical direction and is coaxial with the boss 12.

[0050] Compared with the prior art, the embodiment has the following beneficial effects:

[0051] In an exemplary embodiment, a fastener 1 includes a base body 11, a boss 12, and a plurality of protrusions 13. The base body 11 is provided with a first surface 111, and the boss 12 protrudes from the first surface 111 and has a size gradually decreasing in the direction close to the first surface 111, thereby having an inclined surface to guide the material to move to the first surface 111 during riveting and can be enclosed with the first surface 111 to form a groove 14 for accommodating a sealing element 2. Each protrusion 13 protrudes from the first surface 111 and is arranged around the boss 12, and is suitable for piercing the sheet metal 3 during riveting to achieve the effect of preventing rotation, and due to this, the material of the sheet metal 3 moves to the groove 14 to achieve the effect of preventing the sealing element 2 from being removed or increasing the deformation of the sealing element 2 (in the case of installing the sealing element 2) to increase the sealing effect, and during welding, the protrusions 13 play a role in welding with the sheet metal 3. This scheme has low cost, reliable leakage prevention, simple process, and does not need to heat the sealing element 2 when installing the sealing element 2.

[0052] In an exemplary embodiment, the size of the protrusions 13 gradually decreases in the direction away from the first surface 111, which is beneficial to reduce the initial contact area of the sheet metal 3 and the protrusions 13, and the protrusions 13 are easy to pierce the sheet metal 3 during riveting. At the same time, this design is also beneficial to arc striking and increasing the resistance change rate during welding to ensure the welding quality.

[0053] In an exemplary embodiment, the protrusion 13 extends along the outer edge of the base 11 to the center of the base 11 and is not engaged with the boss 12, so that it has a longer length in this direction, and the anti-rotation effect is better when riveting.

[0054] In an exemplary embodiment, the protrusion 13 is in the shape of a four-sided pyramid with a pointed end, which is easier to pierce or weld to the sheet metal 3.

[0055] In an exemplary embodiment, a screw 15 is further included, the screw 15 protrudes from the surface of the boss 12 facing away from the first surface 111, and the screw 15 has threads to achieve fastening with another object.

[0056] In an exemplary embodiment, a screw hole is further included, the screw hole extends through the base 11 and the boss 12 in the vertical direction, and the screw hole has threads to achieve fastening with another object.

[0057] In an exemplary embodiment, the direction from the outer edge of the base 11 to the center of the base 11 is defined as the first direction, the direction perpendicular to the first direction and parallel to the horizontal plane is defined as the second direction, the size of the protrusion 13 in the first direction is greater than the size of the protrusion 13 in the second direction, the protrusion 13 is longer in the first direction, the anti-rotation effect is better when riveting, and the length of the protrusion 13 in the second direction is smaller, preventing the problem of being too large to pierce or the problem of being too difficult to melt.

[0058] Embodiment Two

[0059] Reference Figure 3 , Figure 4 A fastening assembly includes a seal 2 and the above-mentioned fastener 1, the seal 2 is arranged in the groove 14 formed by the boss 12 and the first surface 111, so that when the material of the sheet metal 3 moves to the groove 14, the seal 2 can be pressed to deform and improve the sealing performance. The seal 2 is a non-metallic material with a certain elasticity, preferably but not limited to 246 fluorine rubber.

[0060] Embodiment Three

[0061] Reference Figure 5 A riveting assembly includes the sheet metal 3 and the above-mentioned fastening assembly, and the sheet metal 3 has a via hole 31. The protrusion 13 is adapted to pierce the sheet metal 3 and move the material of the sheet metal 3 to the groove 14, so that the seal 2 is deformed under pressure and fills the groove 14 together with the sheet metal 3, thereby riveting the sheet metal 3 and the fastener 1 into a riveting assembly.

[0062] With the bolt as the fastener 1 as an example, the shank 15 of the bolt is sleeved into the through hole 31, and the riveting equipment applies pressure to the sheet metal 3 and the bolt through the upper and lower dies, with the increase of the riveting stroke and the riveting force, the protrusion 13 contacts and penetrates into the sheet metal 3, the periphery of the through hole 31 is extruded and deformed, the metal material flows into the groove 14, and at the same time, the sealing element 2 is extruded to deform the sealing element 2 to eliminate the assembly gap between the sheet metal 3 and the lower end surface of the base 11, thereby filling the groove 14.

[0063] Embodiment Four

[0064] A welded assembly including the sheet metal 3 and the fastener 1 described above, the protrusion 13 is adapted to be welded with the sheet metal 3 as a whole, and the protrusion 13 is melted by resistance heat and is fused with the sheet metal 3 during the welding process. The fastening assembly of Embodiment Two can also be processed by the riveting process, the protrusion 13 is welded with the sheet metal 3, and the material of the sheet metal 3 flows into the groove 14 by riveting, and at the same time, the sealing element 2 is extruded to deform the sealing element 2 to eliminate the assembly gap between the sheet metal 3 and the lower end surface of the base 11, thereby filling the groove 14.

[0065] The description of the above specification and embodiments is used to explain the protection scope of the present application, but does not constitute a limitation on the protection scope of the present application. Through the inspiration of the present application or the above embodiments, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiments of the present application or one part of the technical features by combining the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.

Claims

1. A fastener, characterized by: Comprising a base (11) provided with a first face (111); a boss (12) protruding from the first face (111) and gradually decreasing in size along a direction close to the first face (111), the boss (12) and the first face (111) enclosing a groove (14) suitable for accommodating a seal (2); a plurality of protrusions (13), each of the protrusions (13) protruding from the first face (111) and arranged around the boss (12).

2. A fastener as claimed in claim 1 wherein: The protrusions (13) gradually decrease in size along a direction away from the first face (111).

3. A fastener as defined in claim 1, wherein: The protrusions (13) extend along an outer edge of the base (11) to a center of the base (11) and are not engaged with the boss (12).

4. The fastener of claim 1 wherein: The protrusions (13) are shaped as quadrangular pyramids.

5. The fastener of claim 1 wherein: Further comprising a screw rod (15) protruding from a face of the boss (12) away from the first face (111).

6. A fastener as defined in claim 1, wherein: Further comprising a screw hole penetrating the base (11) and the boss (12) along a vertical direction.

7. A fastener as defined in claim 1, wherein: Defining a first direction as a direction from an outer edge of the base (11) to a center of the base (11), and a second direction as a direction perpendicular to the first direction and parallel to a horizontal plane, a size of the protrusions (13) along the first direction is greater than a size of the protrusions (13) along the second direction.

8. A fastening assembly characterized by: Comprising a seal (2) and a fastener (1) according to any one of claims 1-7, the seal (2) being arranged in the groove (14) enclosed by the boss (12) and the first face (111).

9. A riveted assembly characterized by: Comprising sheet metal (3) and a fastening assembly according to claim 8, the protrusions (13) being suitable for penetrating the sheet metal (3) and moving material of the sheet metal (3) to the groove (14) so that the seal (2) is deformed under pressure and fills the groove (14) together with the sheet metal (3).

10. A welding assembly characterized by: Comprising sheet metal (3) and a fastener (1) according to any one of claims 1-7 or a fastening assembly according to claim 8, the protrusions (13) being suitable for being welded to the sheet metal (3) as a whole.

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