Spot welding ground nut column

Abstract

The utility model relates to the technical field of metal processing, in particular to a spot welding ground nut column, which comprises a ground nut column body, the ground nut column body is provided with a threaded column end and a nut end, and the nut end radially extends along the rotating center of the nut end in the direction deviating from the threaded column end to form a cylindrical welding spot bulge; a plurality of spot welding blocks are annularly arrayed on the welding spot protrusions, and the periphery of each spot welding block extends out of a spot welding extension. A gap between the spot welding extension and the nut end can be used for spot welding. According to the grounding nut column, the welding spot protrusion protrudes out of the nut end of the column body of the grounding nut column, a certain welding gap is formed between the welding spot protrusion and the metal plate, then the gap between the welding spot protrusion and the metal plate is welded again, and the welding gap is formed between the welding spot protrusion and the metal plate. The welding seam formed between the spot welding extension and the back face of the metal plate can effectively prevent the problems that the welding position is weakened and is prone to loosening, and when the spot welding extension is located at the bottom of the nut end, the auxiliary effect can be achieved, and welding spots are fuller.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal processing technical field, concretely is a spot welding ground nut post. BACKGROUND

[0002] With the development of new energy vehicles, the ground nut post as a kind of fastener can be used for the grounding and anti-static grounding of electrical equipment, which can effectively guarantee the electrical safety and stable operation of the vehicle.

[0003] However, the spot welding ground nut post corresponding to the arc welding structure of the existing arc welding process is prone to porosity and burning at the welding site due to the difficulty in controlling the welding parameters and operation of the arc welding process, thereby causing poor welding of the ground nut post.

[0004] Based on the above problems, the patent with the patent number CN208951068U discloses a spot welding ground nut post, which has no obvious weakening on the end face after spot welding, and the tearing surface is full, and the welding quality is significantly improved compared with the arc welding ground nut post. At the same time, the cost of spot welding equipment is less than 20% of that of arc welding equipment, and the factors affecting the welding quality are less, the stability is high, and the welding efficiency is also higher.

[0005] However, in the implementation of the above-mentioned spot welding ground nut post, it is found that at least the following problems exist, however, the ground nut post is commonly used near the battery of new energy vehicles, beside the engine body, inside the center console, below the electric seat and the vehicle frame longitudinal beam, which safely guides the electric charge in the equipment or system to the ground to ensure the normal operation of the electrical equipment and the safety of personnel, however, the ground nut post provided with a welding point at one end is more convenient to install around the vehicle frame longitudinal beam, battery or engine body, and the part of the area, the ground nut post provided with a welding point at one end can be installed upward, the positional relationship is that the welding point faces upward and the nut post body faces downward, during welding, the welding material and the molten material can partially flow into the overflow groove to ensure that the welding point is full and prevent splashing, but when the welding point of the ground nut post is installed below the electric seat, the welding point is located at the bottom of the overflow groove, after welding is completed, a gap is easily left between the overflow groove and the sheet metal, and the welding point is not full enough with the assistance of the overflow groove, and at the same time, the gap between the overflow groove and the sheet metal easily weakens the welding site and makes it more prone to looseness. INVENTION CONTENTS

[0006] (I) Technical problem solved

[0007] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a spot welding ground nut post that solves the problems raised in the background.

[0008] (II) Technical scheme

[0009] In order to achieve the above object, the utility model provides a spot welding ground nut column, which comprises: a ground nut column body having a threaded column end and a nut end, the nut end extending radially along the rotation center of the nut end to form a columnar welding point protrusion away from the threaded column end; a plurality of spot welding blocks are arranged in an annular array on the welding point protrusion, and each spot welding block extends a spot welding extension around the periphery; and a gap between the spot welding extension and the nut end allows spot welding.

[0010] Further, the cross section of the spot welding block is a symmetrical trapezoid, the spot welding block comprises two symmetrical inclined surfaces, a wide surface and a narrow surface, and the wide surface and the narrow surface are concave into the spot welding block to form arc surfaces.

[0011] Further, the spot welding extension is outwardly protruded to form an arc surface on the two extension surfaces of the wide surface and the narrow surface of the spot welding block.

[0012] Further, a spot welding groove is formed between the spot welding block and the welding point protrusion.

[0013] Further, the utility model further comprises a bolt, the bolt is bolted with the threaded column end of the ground nut column body, and the bolt and the ground nut column body are both made of aluminum alloy.

[0014] Further, the bolt and the ground nut column body are both electroplated with a nickel plating layer.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a spot welding ground nut column, which has the following beneficial effects:

[0017] 1. The utility model discloses that the welding point protrusion protrudes from the nut end of the ground nut column body, a certain welding gap is formed between the welding point protrusion and the sheet metal, then the gap between the welding point protrusion and the sheet metal is welded again, the welding gap formed between the welding point protrusion and the sheet metal and the welding gap formed between the spot welding extension and the back of the sheet metal can effectively prevent the weakening of the welding position and the problem of easy loosening, and the spot welding extension can play an auxiliary role when being located at the bottom of the nut end, so that the welding point is more full.

[0018] 2. The wide surface or the narrow surface of the two spot welding blocks can play the role of a groove, so that the spot welding molten solder or melt flows into the groove formed by the wide surface or the narrow surface, thereby playing an auxiliary role and further increasing the fullness of the welding point when the ground nut column body is located at different positions or directions.

[0019] 3. The utility model discloses a point welding extension is located the two extension surfaces of wide surface and narrow surface of spot welding block and forms the camber surface outward bulging, through letting the two extension surfaces of point welding extension outward bulging, effectively increase the solder when the grounding nut post column body is placed horizontally, the solder is affected by the camber surface shape, more evenly distribute around the welding spot, help to form the full, even welding spot, reduce the welding defects such as false welding, missed welding, improve the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0021] Figure 2 It is shown Figure 1 It is shown the structure schematic diagram of the utility model at A place;

[0022] Figure 3 It is shown the structure schematic diagram when the grounding nut post column body is connected with the sheet metal horizontally;

[0023] Figure 4 It is shown the structure schematic diagram of spot welding block and point welding extension.

[0024] In the drawing: 1, grounding nut post column body;101, threaded column end;102, nut end;2, welding spot bulge;3, spot welding block;4, point welding extension;5, spot welding groove;6, bolt. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] Embodiment: please refer to Figures 1 to 4 According to the embodiment of the utility model, a technical scheme is provided: a spot welding grounding nut post, comprising: a grounding nut post column body 1 having a threaded column end 101 and a nut end 102, the nut end 102 extends radially along the rotation center of the nut end 102 to a cylindrical welding spot bulge 2 away from the threaded column end 101;A plurality of spot welding blocks 3 are arranged annularly on the welding spot bulge 2, and each spot welding block 3 extends a point welding extension 4 around the circumference;The gap between the point welding extension 4 and the nut end 102 can be used for spot welding.

[0027] When the nut end 102 of the grounding nut column body 1 is downward, that is, installed on the sheet metal of the electric structure at the bottom of the electric seat of the automobile, the nut end 102 of the grounding nut column body 1 is aligned with the pre-welding holes of the sheet metal, then the spot welding block 3 passes through the pre-welding hole to make the welding point protrusion 2 abut against the sheet metal, and the back of the spot welding block 3 and the sheet metal is spot welded to weld and fix the spot welding block 3 and the back of the sheet metal. At this time, since the welding point protrusion 2 protrudes from the nut end 102 of the grounding nut column body 1, a certain welding gap is formed between the welding point protrusion 2 and the sheet metal, then the gap between the welding point protrusion 2 and the sheet metal is welded again, and through the welding gap formed between the welding point protrusion 2 and the sheet metal and the welding gap formed between the spot welding extension 4 and the back of the sheet metal, the problem of weakening and more easily loosening of the welding position can be effectively prevented, and the spot welding extension 4 can play an auxiliary role when being located at the bottom of the nut end 102 to make the welding point more full.

[0028] The cross section of the spot welding block 3 is a symmetrical trapezoid, the spot welding block 3 includes two symmetrical inclined surfaces, a wide surface and a narrow surface, the wide surface and the narrow surface are both concave in the spot welding block 3 and form arc surfaces, the two symmetrical inclined surfaces of the trapezoid help to guide the distribution of welding current and heat, in the process of spot welding, the current is conducted from the electrode to the welding piece through the spot welding block 3, the design of the inclined surface makes the current more evenly diffuse when contacting the welding piece, thereby improving the stability and welding quality of the welding, the wide surface and the narrow surface are both arc surfaces, which can increase the contact area of the spot welding block 3 and the welding piece, secondly, when the grounding nut column body 1 is installed in a horizontal state on the vehicle frame, at least one wide surface or narrow surface on the two spot welding blocks 3 can play a role of a groove, so that the spot welding molten solder or melt flows into the groove formed by the wide surface or the narrow surface, thereby playing an auxiliary role and further increasing the fullness of the welding point when the grounding nut column body 1 is located at different positions or directions.

[0029] The two extension surfaces of the spot welding extension 4 located at the wide surface and the narrow surface of the spot welding block 3 are both outwardly protruding arc surfaces, by making the two extension surfaces of the spot welding extension 4 outwardly protrude, the distribution of the solder around the welding point is more uniform when the grounding nut column body 1 is placed, which helps to form a full and uniform welding point and reduces welding defects such as virtual welding and missed welding, thereby improving the welding quality.

[0030] The concave structure of the spot welding groove 5 between the spot welding block 3 and the welding point protrusion 2 can effectively converge the molten solder in the welding process. Compared with the design without the spot welding groove 5, the solder does not flow randomly but is concentrated in the spot welding groove 5, which helps to form a more full and thicker welding seam at the welding point, thereby significantly enhancing the connection strength between the grounding nut column and the welding piece.

[0031] The bolt 6 is connected with the threaded column end 101 of the grounding nut column body 1, and the bolt 6 and the grounding nut column body 1 are both made of aluminum alloy material. In the complex electrical environment of the automobile, different metal materials in contact may cause electrochemical corrosion due to potential difference, and the use of the same aluminum alloy material can effectively avoid this situation, prolong the service life of the grounding system, and ensure that the grounding connection is stable and reliable for a long time. The aluminum alloy material has the characteristics of light weight and high strength. For new energy vehicles, lightweight is crucial. The bolt 6 and the grounding nut column body 1 made of aluminum alloy material can meet the mechanical performance requirements of the grounding system while helping to achieve the lightweight goal of the whole vehicle and improve the vehicle's range and handling performance.

[0032] The bolt 6 and the grounding nut column body 1 are both plated with a nickel plating layer. Nickel itself has a certain conductivity, although not as good as copper, but after plating nickel on the surface of the aluminum alloy, the surface conductivity of the bolt 6 and the grounding nut column body 1 can be improved to a certain extent. In the automobile electrical system, from the battery to the engine body, the frame longitudinal beam and other grounding connections, good conductivity helps to reduce the voltage drop of electrical equipment, ensures the stable power supply and normal work of electronic equipment, and prevents electromagnetic interference, equipment malfunction and other problems caused by poor grounding.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A spot-welded nut post, characterized in that, include: The grounding nut column body (1) has a threaded column end (101) and a nut end (102), wherein a columnar weld protrusion (2) extends radially from the rotation center of the nut end (102) away from the threaded column end (101). The weld protrusion (2) has a ring array of multiple spot welding blocks (3), and each spot welding block (3) extends a spot welding extension (4) around its periphery; The gap between the spot weld extension (4) and the nut end (102) is available for spot welding.

2. The spot-welded ground nut post according to claim 1, characterized in that: The spot welding block (3) has a symmetrical trapezoidal cross section. The spot welding block (3) includes two symmetrical inclined surfaces, a wide surface and a narrow surface. The wide surface and the narrow surface are both recessed into the spot welding block (3) to form an arc surface.

3. A spot-welded ground nut post according to claim 2, characterized in that: The spot weld extension (4) is located on the two extension surfaces of the wide and narrow surfaces of the spot weld block (3), which both bulge outward to form an arc surface.

4. A spot-welded ground nut post according to claim 1, characterized in that: The spot welding block (3) and the welding point protrusion (2) are recessed to form a spot welding groove (5).

5. A spot-welded ground nut post according to claim 1, characterized in that: It also includes a bolt (6), which is bolted to the threaded end (101) of the grounding nut column body (1), and both the bolt (6) and the grounding nut column body (1) are made of aluminum alloy.

6. A spot-welded ground nut post according to claim 5, characterized in that: Both the bolt (6) and the grounding nut column (1) are electroplated with nickel.

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