Welding fastener, welding fastening assembly and welding assembly

Abstract

The utility model discloses a welding fastener, a welding fastening assembly and a welding assembly. A weld fastener includes a flange, a lower body, a weld leg, and a counter bore. The lower body downwards protrudes out of the flange; the weld leg protrudes downwards out of one of the flange and the lower body, and the counter bore is formed in the other one of the flange and the lower body, that is, when the weld leg protrudes out of the flange, the counter bore is formed in the lower body; when the welding leg protrudes out of the lower body, the counter bore is formed in the flange. As the lower end of the welding leg and the lower end of the counter bore are not located on the same plane, the distance between a heat source of the welding leg and the counter bore is increased, conduction of heat to the counter bore is reduced, the sealing piece is prevented from losing efficacy, the sealing effect is guaranteed, the requirements for welding working conditions, parameters, equipment and personnel quality are low, and the welding quality is improved. The quality is stable.

Description

TECHNICAL FIELD

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

[0002] With the development of society and the automobile industry, people's requirements for the safety performance and stability performance of automobiles are higher and higher. In particular, the requirements for water leakage prevention, air leakage prevention and the like of electric vehicles are higher and higher. Projection welding fasteners are widely used in the connection of automobile systems such as vehicle bodies. However, the conventional projection welding fasteners do not have the function and structure of preventing leakage. Usually, due to the influence of application conditions such as welding conditions and parameters, the leakage prevention specification requirements cannot be met after welding, and arc welding needs to be used to perform whole-circle repair welding on the outer circle of the nut, which has poor leakage prevention performance, low repair welding efficiency and high cost.

[0003] In the prior art, a welding ring is arranged at the bottom of the flange of the hexagonal flange nut, and a gasket is arranged at the end of the threaded blind hole. The gasket is made of high-temperature-resistant plastic, and the gasket is pressed against the metal sheet after welding to prevent leakage. In this design, the plastic gasket and the welding ring are almost horizontal (both protrude above the flange plane), and the distance between them is close in the radial direction. Since the flange is a large plane, during the welding process, the flange horizontal plane is the center of the welding heat source. During the welding process, the contact between the welding leg and the metal sheet generates resistance heat, which melts the metal of the metal sheet and the welding leg, and under the action of pressure, the molten metal re-nucleates to form a welded joint. The melting point of steel is about 1500℃. Based on the above reasons, heat is conducted from the flange structure to the plastic gasket during the welding process, and the highest temperature at the blind hole is usually 200-400℃. The general use temperature of plastic is within 150℃, and even the high-temperature-resistant plastic has a recommended use temperature of not more than 250℃. Therefore, due to the influence of welding conditions, parameters, equipment and other factors, the high temperature will change the physical properties of the plastic gasket (such as shrinkage deformation), causing the leakage prevention function to fail. Overheating causes the plastic gasket to fail, and insufficient welding heat causes the welding connection to fail, which is a difficult problem that cannot be reconciled and needs to be solved. 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 overcoming the above-mentioned defects or problems in the background art, and providing a welding fastener, a welding fastening assembly and a 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] Solution one, a welding fastener, comprising

[0007] a flange;

[0008] a lower body protruding downward from the flange;

[0009] a weld leg protruding downward from one of the flange and the lower body,

[0010] a counterbore provided in the other of the flange and the lower body and having a slot opening downward, the counterbore being adapted to accommodate a sealing member, the lower end of the weld leg and the lower end of the counterbore not being in the same plane.

[0011] Option II, based on Option I, further provided with a threaded hole penetrating the weld fastener in the vertical direction.

[0012] Option III, based on Option II, the thickness of the flange being 2-5P, P being the pitch of the threaded hole.

[0013] Option IV, based on Option I, further comprising an upper body protruding upward from the flange.

[0014] Option V, based on Option I, the weld leg protruding from the flange, the counterbore being provided in the lower body, the height of the lower body being higher than the height of the weld leg.

[0015] Option VI, based on Option I, the cross section of the weld leg being triangular, the inclination of the weld leg away from the counterbore being smaller than the inclination of the weld leg close to the counterbore.

[0016] Option VII, a weld fastening assembly comprising a sealing member and a weld fastener according to any one of Options I to VI.

[0017] Option VIII, a weld assembly comprising sheet metal and a weld fastening assembly according to Option VII, the weld leg being adapted to be welded integrally with the sheet metal so that the sealing member is deformed and presses the sheet metal.

[0018] Option IX, based on Option VIII, the sheet metal being provided with a first surface and a counter-sink opening in the first surface, the weld leg being welded with one of the first surface and the bottom of the counter-sink, the sealing member being deformed and pressing the other of the first surface and the bottom of the counter-sink.

[0019] Option X, based on Option VIII, there being a gap between the counterbore and the sheet metal before the weld leg contacts and is welded with the sheet metal.

[0020] From the above description of the present application and its preferred embodiments, it can be seen that, relative to the prior art, the technical scheme of the present application and its preferred embodiments have the following beneficial effects due to the use of the following technical means:

[0021] 1. In Option I and its preferred embodiments, a weld fastener comprises a flange, a lower body, a weld leg and a counterbore.

[0022] The lower body protrudes downward from the flange;

[0023] The welding leg protrudes downward from one of the flange and the lower body, and the counterbore is arranged in the other of the flange and the lower body, that is, when the welding leg protrudes from the flange, the counterbore is arranged in the lower body; when the welding leg protrudes from the lower body, the counterbore is arranged in the flange. The counterbore slot faces downward, the counterbore is suitable for accommodating the sealing element, and the welding leg is suitable for being welded with the sheet metal. Since the lower end of the welding leg and the lower end of the counterbore are not in the same plane, the distance between the welding leg heat source and the counterbore is increased, the heat conduction to the counterbore is reduced, the sealing element is prevented from failing, the sealing effect is ensured, the requirements for welding conditions, parameters, equipment, and personnel quality are small, and the quality is stable.

[0024] 2. In the second scheme and the preferred embodiments thereof, a threaded hole is further arranged, which penetrates the welding fastener in the vertical direction, and is used for connecting a bolt or the like.

[0025] 3. In the third scheme and the preferred embodiments thereof, the thickness of the flange is 2-5P, P is the pitch of the threaded hole, the flange is relatively thin, the welding heat is quickly conducted from the flange to the upper electrode, the heat is quickly taken away and cooled by the cooling liquid in the upper electrode system, rapid heat dissipation is achieved, the heat conduction to the counterbore is reduced, and the sealing element is prevented from overheating and failing.

[0026] 4. In the fourth scheme and the preferred embodiments thereof, the upper body is further included, the upper body protrudes upward from the flange, the strength is increased, and the positioning is facilitated.

[0027] 5. In the fifth scheme and the preferred embodiments thereof, the welding leg protrudes from the flange, the counterbore is arranged in the lower body, and the height of the lower body is higher than that of the welding leg. The welding spatter can be prevented from affecting the sealing element, the linear distance from the welding leg to the counterbore can be increased, the heat conduction time can be prolonged, the temperature conducted to the counterbore can be reduced, and the surface area is increased to accelerate heat dissipation.

[0028] 6. In the sixth scheme and the preferred embodiments thereof, the cross section of the welding leg is triangular, the inclination angle of the welding leg far from the counterbore is smaller than that of the welding leg close to the counterbore, the geometric center of the welding leg is relatively far from the counterbore, and less heat is conducted to the counterbore.

[0029] 7. In the seventh scheme and the preferred embodiments thereof, a welding fastening assembly includes a sealing element and the above-mentioned welding fastener, and has the beneficial effects brought by the above-mentioned welding fastener. The sealing element does not need to use high-temperature-resistant materials with high prices, and the cost is low.

[0030] 8. In the eighth scheme and the preferred embodiments thereof, a welding assembly includes sheet metal and the above-mentioned welding fastening assembly, the welding leg is suitable for being welded with the sheet metal to be integrated, so that the sealing element is deformed and pressed against the sheet metal, and has the beneficial effects brought by the above-mentioned welding fastening assembly.

[0031] 9. In Scheme 9 and its preferred embodiments, the sheet metal is provided with a first surface and a groove opening on the first surface. The welding foot is welded to one of the first surface and the bottom of the groove. The sealing element deforms and squeezes the other of the first surface and the bottom of the groove. By setting a step, it is convenient for welding and sealing to achieve double sealing.

[0032] 10. In Scheme 10 and its preferred embodiments, the welding foot contacts the sheet metal and there is a gap between the countersunk hole and the sheet metal before welding, so as to ensure that the seal does not contact the sheet metal before welding and to prevent affecting the welding. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a perspective view of the welded fastener in Example 1;

[0035] Figure 2 This is a cross-sectional view of the welded fastener in Example 1;

[0036] Figure 3 This is a cross-sectional view of the welding assembly in Example 1;

[0037] Figure 4 This is an enlarged view of the solder joint in Example 1;

[0038] Figure 5 This is a three-dimensional view of the sheet metal in Example 1;

[0039] Figure 6 This is a schematic diagram of the structure before riveting in Example 1;

[0040] Figure 7 This is a schematic diagram of the riveted structure in Example 1;

[0041] Figure 8 This is a cross-sectional view of the welded fastener in Example 2;

[0042] Explanation of key figure labels:

[0043] Welding fastener 1; Flange 11; Lower body 12; Weld leg 13; Countersunk hole 14; Upper body 15; Threaded hole 16; Seal 2; Sheet metal 3; First surface 31; Countersunk groove 32; First hole 33; Detailed Implementation

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described 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 excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0045] In the claims, the description and the drawings of the present application, unless otherwise explicitly defined, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0046] In the claims, the description and the drawings of the present application, unless otherwise explicitly defined, for the terms of orientation, such as "center", "transverse", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and are not used to indicate or imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0047] In the claims, the description and the drawings of the present application, unless otherwise explicitly defined, such as the terms "fixedly connected" or "fixedly connected", should be broadly understood, that is, any connection mode without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0048] In the claims, the description and the drawings of the present application, unless otherwise explicitly defined, such as the terms "including", "having" and their variants, are intended to mean "including but not limited to".

[0049] Reference Figures 1-7 A welding assembly includes sheet metal 3 and a welding fastening assembly, which includes sealing member 2 and welding fastener 1.

[0050] The welding fastener 1 includes a flange 11, a lower body 12, a welding leg 13, a counterbore 14, an upper body 15 and a threaded hole 16. In this embodiment, the welding fastener 1 is in the form of a nut, and in other embodiments, it can be a screw.

[0051] Reference Figures 1-3, the outer contour of the flange 11 can be circular, polygonal, etc. In this embodiment, it is circular. The flange 11 is disposed between the upper body 15 and the lower body 12. Among them, the upper body 15 protrudes upward from the flange 11, and the lower body 12 protrudes downward from the flange 11, such that the upper body 15, the lower body 12, and the flange 11 are generally in a "middle" character structure.

[0052] In this embodiment, the outer contours of the upper body 15 and the lower body 12 are both circular, and their diameters are equal. The upper body 15, the lower body 12, and the flange 11 are coaxially arranged.

[0053] The threaded hole 16 penetrates through the welding fastener 1 in the vertical direction. In this embodiment, the threaded hole 16 sequentially penetrates through the upper body 15, the flange 11, and the lower body 12, and is coaxial with the flange 11. The thickness of the flange 11 is 2 - 5P, where P is the pitch of the threaded hole 16.

[0054] In this embodiment, the counterbore 14 is provided on the lower end surface of the lower body 12 and is close to the threaded hole 16. The notch of the counterbore 14 faces downward. The counterbore 14 is suitable for accommodating the seal 2. The counterbore 14 is annular, and the counterbore 14 is coaxial with the flange 11. Moreover, the cross-section of the counterbore 14 is wider at the top and narrower at the bottom to facilitate the clamping of the seal 2.

[0055] The seal 2 is suitable for deformation and is an O-ring. The seal 2 is clamped in the counterbore 14 or adhesively bonded to the counterbore 14. In this embodiment, the seal 2 is clamped in the counterbore 14.

[0056] In this embodiment, the fillet weld 13 protrudes downward from the flange 11 and is located outside the flange 11 (close to the outer contour of the flange 11), away from the threaded hole 16, and the height of the lower body 12 is higher than the height of the fillet weld 13. The fillet weld 13 is annular, and the cross-section of the fillet weld 13 is triangular. Refer to Figure 4 , the inclination angle A1 of the fillet weld 13 away from the counterbore 14 is smaller than the inclination angle A2 of the fillet weld 13 close to the counterbore 14. The fillet weld 13 is suitable for being welded to the sheet metal 3 as a whole, so that the seal 2 deforms and presses the sheet metal 3. The lower end of the fillet weld 13 and the lower end of the counterbore 14 are not in the same plane.

[0057] Refer to Figure 5 , the sheet metal 3 is provided with a first surface 31, a counterbore 32, and a first hole 33. The first surface 31 faces the welding fastener 1, that is, it is arranged upward. The counterbore 32 opens on the first surface 31. The first hole 33 penetrates through the sheet metal 3 in the vertical direction, and its upper end opens at the bottom of the counterbore 32. In this embodiment, both the counterbore 32 and the first hole 33 are circular in a top view, and the inner diameter of the counterbore 32 is larger than the aperture of the first hole 33. The counterbore 32 and the first hole 33 are coaxially arranged. The first hole 33 can be a smooth hole or a hole with a threaded section.

[0058] Refer to Figure 6 ,Figure 7 Before welding, the welding leg 13 contacts the first surface 31 of the sheet metal 3, the lower body 12 extends into the sink 32, and the gap between the sink hole 14 and the bottom of the sink 32 of the sheet metal 3 exists, and the threaded hole 16 corresponds to the first hole 33.

[0059] Then the upper electrode is in contact with the upper surface of the flange 11, and the lower electrode is in contact with the lower surface of the flange 11. After power is turned on, the welding leg 13 melts and is welded to the first surface 31 of the sheet metal 3, and at the same time the sealing element 2 in the sink hole 14 is extruded and deformed, extruding the bottom of the sink 32 and eliminating the gap between the sink hole 14 and the bottom of the sink 32 of the sheet metal 3. The welding of the welding leg 13 and the extrusion of the sealing element 2 realize the function of double sealing. During the welding process, the welding heat is quickly conducted from the flange 11 to the upper electrode, and the heat is cooled by the cooling liquid in the upper electrode system to prevent the sealing element 2 from overheating and failing.

[0060] Example two

[0061] Different from example one, the positions of the welding leg 13 and the sink hole 14 are different. Referring to Figure 8 In this embodiment, the welding leg 13 protrudes downward from the lower body 12, and the sink hole 14 is arranged on the flange 11.

[0062] Before welding, the lower body 12 extends into the sink 32, the welding leg 13 contacts the bottom of the sink 32 of the sheet metal 3, and the gap between the sink hole 14 and the first surface 31 of the sheet metal 3 exists. After power is turned on and welded, the welding leg 13 is welded to the sink 32 of the sheet metal 3, and the sealing element 2 is deformed and extruded to the first surface 31 to realize double sealing.

[0063] Compared with the prior art, the embodiment has the following beneficial effects:

[0064] In an exemplary embodiment, a welded fastener 1 includes a flange 11, a lower body 12, a welding leg 13, and a sink hole 14. The lower body 12 protrudes downward from the flange 11; the welding leg 13 protrudes downward from one of the flange 11 and the lower body 12, and the sink hole 14 is arranged on the other one of the flange 11 and the lower body 12, that is, when the welding leg 13 protrudes from the flange 11, the sink hole 14 is arranged on the lower body 12; when the welding leg 13 protrudes from the lower body 12, the sink hole 14 is arranged on the flange 11. The sink hole 14 has a downward opening, the sink hole 14 is adapted to accommodate a sealing element 2, and the welding leg 13 is adapted to be welded to a sheet metal 3. Since the lower end of the welding leg 13 and the lower end of the sink hole 14 are not in the same plane, the distance between the heat source of the welding leg 13 and the sink hole 14 is increased, the heat conduction to the sink hole 14 is reduced, the sealing element 2 is prevented from failing, the sealing effect is ensured, the requirements for welding conditions, parameters, equipment, and personnel quality are small, and the quality is stable.

[0065] In an exemplary embodiment, a threaded hole 16 is also provided, which penetrates the welded fastener 1 in the vertical direction for connecting bolts and the like.

[0066] In an exemplary embodiment, the flange 11 has a thickness of 2-5P, P being the pitch of the threaded hole 16, the flange 11 is thinner, accelerating the welding heat conduction from the flange 11 to the upper electrode, so that the heat is quickly taken away and cooled by the cooling liquid in the upper electrode system, achieving rapid heat dissipation, reducing the heat conduction to the counterbore 14, and preventing the sealing element 2 from overheating and failing.

[0067] In an exemplary embodiment, the upper body 15 is further included, the upper body 15 protrudes upward from the flange 11, increasing the strength and facilitating positioning with the mold.

[0068] In an exemplary embodiment, the weld leg 13 protrudes from the flange 11, and the counterbore 14 is arranged in the lower body 12, the height of the lower body 12 is higher than the height of the weld leg 13, which can prevent welding spatter from affecting the sealing element 2, while increasing the linear distance from the weld leg 13 to the counterbore 14, prolonging the heat conduction time, reducing the temperature conducted to the counterbore 14, and increasing the surface area to accelerate heat dissipation.

[0069] In an exemplary embodiment, the cross section of the weld leg 13 is triangular, the inclination angle of the weld leg 13 away from the counterbore 14 is smaller than the inclination angle of the weld leg 13 close to the counterbore 14, so that the geometric center of the weld leg 13 is relatively far away from the counterbore 14, and less heat is conducted to the counterbore 14.

[0070] In an exemplary embodiment, a welded fastening assembly includes the sealing element 2 and the above-mentioned welded fastener 1, and has the beneficial effects brought by the above-mentioned welded fastener 1, and the sealing element 2 does not need to use high-temperature-resistant materials with high prices, thereby reducing the cost.

[0071] In an exemplary embodiment, a welded assembly includes the sheet metal 3 and the above-mentioned weld leg 13 fastening assembly, the weld leg 13 is adapted to be welded with the sheet metal 3 to form a whole, so that the sealing element 2 deforms and extrudes the sheet metal 3, and has the beneficial effects brought by the above-mentioned weld leg 13 fastening assembly.

[0072] In an exemplary embodiment, the sheet metal 3 is provided with a first surface 31 and a sink 32 opening in the first surface 31, the weld leg 13 is welded with one of the first surface 31 and the bottom of the sink 32, and the sealing element 2 deforms and extrudes the other of the first surface 31 and the bottom of the sink 32, thereby facilitating welding and double sealing of the sealing element 2 by setting the steps.

[0073] In an exemplary embodiment, before the weld leg 13 contacts and is welded with the sheet metal 3, there is a gap between the counterbore 14 and the sheet metal 3, so as to ensure that the sealing element 2 does not contact the sheet metal 3 before welding, thereby preventing the welding from being affected.

[0074] The description of the above specification and the embodiments are used to explain the protection scope of the present application, but do not constitute the limitation of the protection scope of the present application. Through the inspiration of the present application or the above embodiments, the ordinary skilled in the art combines the common knowledge, the ordinary technical knowledge in the art and / or the prior art, and obtains the modification, equivalent replacement or other improvement of the present application embodiment or one part of the technical features through logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.

Claims

1. A welded fastener characterized by: Comprising a flange (11); a lower body (12) protruding downwardly from the flange (11); a welding leg (13) protruding downwardly from one of the flange (11) and the lower body (12), a counterbore (14) provided in the other of the flange (11) and the lower body (12) and having a downwardly opening slot, the counterbore (14) being adapted to accommodate a seal (2), the lower end of the welding leg (13) and the lower end of the counterbore (14) not being located in the same plane.

2. A welded fastener as defined in claim 1, wherein: Further provided is a threaded hole (16) extending through the welding fastener in a vertical direction.

3. A welded fastener as defined in claim 2, wherein: The flange (11) has a thickness of 2-5P, P being the pitch of the threaded hole (16).

4. A welded fastener as defined in claim 1, wherein: Further comprising an upper body (15) protruding upwardly from the flange (11).

5. A welded fastener as defined in claim 1, wherein: The welding leg (13) protrudes from the flange (11), the counterbore (14) is provided in the lower body (12), and the height of the lower body (12) is higher than the height of the welding leg (13).

6. A welded fastener as defined in claim 1, wherein: The cross section of the welding leg (13) is triangular, and the inclination of the welding leg (13) away from the counterbore (14) is smaller than the inclination of the welding leg (13) close to the counterbore (14).

7. A welded fastener assembly characterized by: Comprising a seal (2) and a welding fastener (1) according to any one of claims 1-6.

8. A welding assembly characterized by: Comprising sheet metal (3) and a welding fastener assembly according to claim 7, the welding leg (13) being adapted to be welded integrally with the sheet metal (3) so that the seal (2) is deformed and presses the sheet metal (3).

9. A welding assembly as defined in claim 8, wherein: The sheet metal (3) is provided with a first surface (31) and a counterbore (32) opening in the first surface (31), the welding leg (13) being welded with one of the first surface (31) and the bottom of the counterbore (32), the seal (2) being deformed and pressing the other of the first surface (31) and the bottom of the counterbore (32).

10. A welding assembly as defined in claim 8, wherein: Before the welding leg (13) is welded with the sheet metal (3), there is a gap between the counterbore (14) and the sheet metal (3).

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