JPH04111912U - Weld nut for earth - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a grounding weld nut in which the terminal connected to the grounding terminal of a vehicle electrical component is tightened with a bolt so that the grounding terminal is electrically connected to the body panel and grounded. to do. [Structure] A groove 2b of an appropriate shape is formed on the periphery of the threaded part 2a on the welding surface of the weld nut, and the axial force generated by tightening the bolt 6 causes the periphery to protrude from the welding surface. contact terminal 4. The tip portion is formed into a protruding shape or the like to prevent paint from adhering when painting the body panel 10.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed to connect the ground of electrical components installed in a vehicle to the vehicle body. Regarding weld nuts for

0002

[Conventional technology]

To connect the ground of a vehicle electrical component to the vehicle body, connect it to the ground side of the electrical component. Attach a terminal such as a crimp terminal to the end of the cable, and attach the terminal to the bolt. This is done by tightening the bolts and nuts so that they are in close contact with the body panel. In this case, a weld nut that has been welded to the body panel in advance is used as the nut. It is being

0003 To paint the body panels, do it after welding the weld nuts. cormorant. This ensures that there is no paint between the weld nut and the body panel. Therefore, these are conducting.

0004

[Problem that the idea aims to solve]

However, electrical components are installed after the body panels are painted, and after installation the electrical components are grounded. must be connected. Then, firmly attach the above terminal to the painted part. Even if the terminal is connected to the body panel, paint may adhere to the body panel. Since there is no conduction, there is no grounding. For this reason, paint the body panels. When painting, apply tape or the like to the part that will come into close contact with the terminal to mask it. Remove the masking tape when tightening the bolt to the weld nut. I'm doing it.

[0005] Although it is certain that the grounding area can be secured using masking tape like this, The work of applying and peeling masking tape is complicated. Also, in the coating furnace, The skinning tape may peel off, resulting in contamination of the painting furnace. .

[0006] Therefore, this idea was developed to attach bolts to weld nuts even after painting the body panels. A grounding weld donor that allows you to make a ground connection by simply tightening the bolt. The aim is to provide the following.

[0007]

[Means to solve the problem]

For the above purpose, the earthing weld nut according to this invention is The grounding terminal is welded to the body panel and screwed together with the bolt. In the grounding weld nut to be clamped, the screw on the welding surface side of the weld nut above A groove is formed on the peripheral edge of the threaded part, and the shape of the groove is adjusted according to the axial force applied to the threaded part. The peripheral edge of the threaded part is formed in a shape that protrudes from the welding surface, and the gap between the groove and the threaded part is It is characterized by a cross-sectional shape that prevents paint from adhering to it.

[0008]

[Effect]

Tighten the bolt with the terminal inserted into the weld nut above, and then If the weld nut contacts the body panel and is further tightened, An axial force will be applied to this portion. Therefore, the peripheral edge of the threaded part is -Protrudes toward the panel side and the part between the groove and the threaded part contacts the terminal above. .

[0009] Therefore, the above terminal is electrically connected to the body panel through the weld nut. However, the electrical equipment connected to the terminal will be grounded.

0010

【Example】

Hereinafter, based on the illustrated embodiment, the grounding weld nut according to this invention will be explained. I will explain in detail.

[0011] Figure 3 is a perspective view of parts for connecting the ground of electrical equipment (not shown). It is constructed by combining a donut 2, a terminal 4, a bolt 6, and a washer 8. Ru.

0012 The weld nut 2 is inserted into a through hole formed in the body panel 10, as shown in FIG. 10a and threaded part 2a and attach it to the body panel 10 by projection welding etc. It is welded. This is the peripheral edge of the threaded portion 2a and is welded to the body panel 10. A groove with an appropriate width, depth, etc., is provided on the surface to fully perform the functions described below. 2b is formed, and the cross-sectional shape of the portion 2c between the groove portion 2b and the threaded portion 2a is as shown in Figure 1. And as shown in FIG. 2, it is formed into a protrusion shape. The part 2c is formed into a protrusion shape. What happens is that when the weld nut 2 and body panel 10 are painted, the protrusion This is because paint does not adhere to the tip of the tip due to its shape. The shape is not limited to a protrusion as long as it has a good shape. Note that the groove portion 2b is annular around the threaded portion 2a. Even if it is formed by forming an appropriate number of discontinuously along an arc. I do not care.

[0013] The terminal 4 is a cable 3 connected to a ground terminal of an electrical component (not shown). The terminal 4 is fixed to the tip of the terminal 4 by crimping or the like, and a bolt 6 is inserted into the terminal 4. A through hole 4a is formed therethrough.

[0014] The function of the earthing weld nut constructed as above will be explained below.

[0015] To connect the ground of electrical equipment, pass washer 8 through bolt 6 and then connect the terminal. 4 and tighten the bolt 6 to the weld nut 2. The bolt 6 is When the weld nut 2 is moved forward and tightened to the appropriate position, as shown in Figure 1. Terminal 4 is in close contact with body panel 10, and bolt 6 is no longer connected. It stops moving upward. If the bolt 6 is further tightened in this state, the bolt 6 will rotate. As a result of rotation, the threaded part 2a of the weld nut 2 is pulled into the head of the bolt 6. The force that comes to you is added. A groove portion 2b is formed at the peripheral edge of the threaded portion 2a. Since the groove 2b reduces the rigidity of the peripheral edge of the threaded part 2a, the stiffness of the threaded part 2a The peripheral edge portion bends toward the head of the bolt 6 and protrudes from the welding surface.

[0016] Then, in a suitably bent and protruding state, as shown in FIG. The protruding tip of the portion 2c comes into contact with the terminal 4. This protrusion Paint does not adhere to the tip even after painting the body panel 10. Therefore, the terminal 4 and the weld nut 2 are electrically connected. Therefore, The ground terminal of the electrical equipment is connected to the body part via terminal 4 and weld nut 2. It will be conductive to channel 10 and grounded to the car body. In addition, if you loosen bolt 6, 2, so that the threaded portion 2a bent to the state shown in FIG. 2 returns to the state shown in FIG. The material of the weld nut 2 and the shape of the groove 2b are selected so that the deformation occurs within the elastic range. It is preferable to select.

[0017]

[Effect of the idea]

As explained above, according to the earthing weld nut according to this invention, the body - Even when the panel is painted, the paint does not stick to the protruding peaks. The periphery of the threaded part of the weld nut should be adjusted when an axial force is applied to the threaded part. Now that the weld nut is bent, tighten the bolt to the weld nut. The threaded portion is bent toward the head of the bolt, and an arc is formed between the head and the weld nut. By interposing a terminal for the weld nut, the periphery of the threaded part of the weld nut can be tightened. terminal, and the vehicle electrical components are grounded through the terminal. Become.

[0018] Moreover, preparatory work such as applying masking tape etc. before painting the body panels There is no need to remove the masking tape when making a ground connection. You can connect the ground just by tightening the bolts, which simplifies the work and saves time. Cost can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the longitudinal direction of the bolt showing a state in which the bolt is tightened to the weld nut, and shows a state before the peripheral edge of the threaded portion of the weld nut protrudes from the welding surface.

FIG. 2 is a sectional view taken along the longitudinal direction of the bolt showing a state in which the bolt is tightened to the weld nut, and shows a state in which the peripheral edge of the threaded portion of the weld nut protrudes from the welding surface and is electrically connected to the ground.

FIG. 3 is a perspective view showing a component for providing electrical continuity to the ground of a vehicle electrical component.

[Explanation of symbols]

2 Weld nut 2a Thread part 2b Groove 3 Cable 4 Terminal 6 bolts 8 Washer 10 body panel

Claims (1)

[Scope of utility model registration request] 1. A grounding weld nut that is welded to a body panel and screwed onto a bolt to clamp a grounding terminal together with the body panel, wherein a groove is formed in the periphery of the threaded part on the welding surface side of the weld nut, The shape of the groove is formed so that the peripheral edge of the thread protrudes from the welding surface due to the axial force applied to the thread, and the cross-sectional shape between the groove and the thread is shaped to prevent paint from adhering. A weld nut for grounding that is characterized by: