Grounding nut and bolt assembly

Abstract

The utility model discloses a grounding nut bolt assembly which comprises a nut, a bolt, an electrode contact and a plugging piece, the nut is provided with a limiting shoulder and an inner threaded hole, the plugging piece is fixed at the top of the inner threaded hole in a pressing rivet sealing mode, and the electrode contact is installed on the bolt in a sleeved mode. The bolt is fixedly installed in a threaded hole of the nut in a threaded connection mode to press and fix the electrode connector, and the surface of an inner threaded hole of the nut and the surface of an outer threaded hole of the bolt are tinned. The internal threaded hole of the nut of the grounding assembly is arranged in a through manner, the surface of the internal threaded hole can be comprehensively tinned, the oxidation resistance of the nut can be improved, the conductivity can be enhanced, the attractiveness can be improved, and the electromagnetic shielding performance can be enhanced; and the sealing waterproof requirement of the grounding assembly is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of grounding components, in particular to a grounding nut and bolt assembly. Background Art

[0002] Grounding protects personal safety, electrical equipment, and eliminates electromagnetic interference. Grounding essentially means selecting the vehicle body as a reference point for electrical potential. This means the vehicle's battery and other electrical components are all considered zero potential relative to the vehicle body. This doesn't necessarily mean connecting to the ground; it simply means achieving equal potential.

[0003] All contactable conductive metal parts on the battery box shell of electric vehicles (such as covers, brackets, water cooling pipes, etc.) must be connected to the shell at the same potential, which can be achieved through various methods such as welding, crimping, and bolting. If the equipotential connection is achieved by crimping or bolting, the contact surface cannot be painted or insulated, otherwise the contact impedance will be very large and cannot meet the requirements. There are also corresponding specifications for the type and torque of the bolts for equipotential connection: 1) Welding, welding reliability; 2) Crimping, the contact surface cannot be painted or insulated, otherwise the contact impedance will be large and cannot meet the requirements; 3) Bolting, the contact surface cannot be painted or insulated, otherwise the contact impedance will be large and cannot meet the requirements.

[0004] Tinning the contact surface between the grounding nut and the bolt can improve oxidation resistance, enhance electrical conductivity, improve welding performance, enhance aesthetics, and enhance electromagnetic shielding. Although nuts with closed top structures have better sealing properties, the surface of the threaded hole in the blind hole structure is almost impossible to be tinned. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a grounding nut and bolt assembly with good sealing performance and good tinning effect.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a grounding nut and bolt assembly, comprising a nut, a bolt, an electrode joint and a sealing piece, the nut having a limiting shoulder and an internal threaded hole, the sealing piece being riveted and sealed on the top of the internal threaded hole, the electrode joint being sleeved and installed on the bolt, the bolt being threaded and fixed in the threaded hole of the nut to press and fix the electrode joint, and the surface of the internal threaded hole of the nut and the surface of the external threaded hole of the bolt are tinned.

[0007] Preferably, a first through hole and a second through hole connected to the internal threaded hole are coaxially arranged on the top of the nut, the diameter of the first through hole is larger than the diameter of the second through hole, and the sealing piece is riveted and sealed and fixed in the first through hole and the second through hole.

[0008] Preferably, the diameter of the first through hole is 1.1-2 times the diameter of the second through hole.

[0009] Preferably, a hexagonal tool surface is provided on the outer wall of the nut, and an octagonal tool surface is provided on the head of the bolt.

[0010] Preferably, the bottom surface of the head of the bolt has a welding ring.

[0011] Preferably, the bottom surface of the welding ring has a blind hole.

[0012] Preferably, a first boss is formed on the bottom surface of the nut, and a second boss with the same shape and size as the first boss is formed on the top surface of the bolt head.

[0013] Compared with the existing technology, the benefits of the present invention are: the internal threaded hole of the nut of the grounding assembly is set through, and the surface of the internal threaded hole can be fully tinned, which can improve the nut's oxidation resistance, enhance its conductivity, improve its aesthetics and enhance its electromagnetic shielding properties. The top opening of the nut is then sealed by a sealing piece to ensure the sealing of the top of the nut, meeting the sealing and waterproof requirements of the grounding assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a three-dimensional diagram from the upper perspective of the present invention.

[0016] Figure 2 It is a bottom perspective stereogram of the present invention.

[0017] Figure 3 It is the main view of the present utility model.

[0018] Figure 4 yes Figure 3 AA section view.

[0019] Figure 5 is a cross-sectional view of the nut.

[0020] Figure 6 It is a schematic diagram of the structure of the sealing piece before it is riveted and fixed. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with specific embodiments:

[0022] like Figures 1 to 6The grounding nut and bolt assembly shown includes a nut 1, a bolt 2, an electrode joint 4 and a sealing piece 3. The nut 1 has a limiting shoulder 11 and an internal threaded hole 13. The sealing piece 3 is riveted and sealed at the top of the internal threaded hole 13. The electrode joint 4 is sleeved and installed on the bolt 2. The bolt 2 is threaded and fixed in the threaded hole 13 of the nut 1 to press and fix the electrode joint 4. The surface of the internal threaded hole 13 of the nut 1 and the external threaded surface of the bolt 2 are tin-plated.

[0023] The top of the nut 1 is coaxially provided with a first through hole 12 and a second through hole 14 connected to the internal threaded hole 13. The diameter of the first through hole 12 is larger than the diameter of the second through hole 14. The blocking member 3 is fixedly installed in the first through hole 12 and the second through hole 14 by riveting. The first through hole 12 and the second through hole 14 facilitate sealing and fixing the blocking member 3 with the blocking member 3 when riveting, which can play a better sealing role. The diameter of the first through hole 12 is 1.3 times the diameter of the second through hole 14. Figure 6 As shown, the bottom of the blocking member 3 is a cylindrical rod structure before being fixed by pressure riveting. After being riveted, the blocking member 3 is deformed and cooperates with the shoulder surface between the first through hole 12 and the second through hole 14 to form a limiting surface to prevent the blocking member 3 from falling out.

[0024] A hexagonal tool surface 15 is provided on the outer wall of the nut 1 , and an octagonal tool surface 24 is provided on the head 21 of the bolt 2 . The hexagonal tool surface 15 and the octagonal tool surface 24 increase the anti-rotation torque when tightening the nut 1 and the bolt 2 .

[0025] The bottom surface of the head 21 of the bolt 2 is provided with a welding ring 22 , which is embedded in a mounting hole of the automobile body and fixed by welding.

[0026] The bottom surface of the welding ring 22 has a blind hole 23, and the welding ring 22 is embedded in the mounting hole of the automobile body. Due to the structure of the blind hole 23, the welding ring 22 can be squeezed and deformed, so that the welding ring 22 can fit tightly with the mounting hole of the automobile body to achieve better conductive effect.

[0027] A first boss 16 is formed on the bottom surface of the nut 1, and a second boss 25 with the same shape and size as the first boss 16 is formed on the top surface of the head 21 of the bolt 2. A sealing ring installation area is formed between the first boss 16 and the electrode connector 4, and between the second boss 25 and the electrode connector 4. By sleeve-arranging a sealing ring on the bolt 2, the sealing performance of the nut 1, the bolt 2 and the electrode connector 4 can be improved.

Claims

1. A grounding nut and bolt assembly, characterized in that: The invention comprises a nut (1), a bolt (2), an electrode joint (4) and a sealing member (3), wherein the nut (1) has a limiting shoulder (11) and an internal threaded hole (13), the sealing member (3) is fixed to the top of the internal threaded hole (13) by pressure riveting, the electrode joint (4) is sleeved and mounted on the bolt (2), the bolt (2) is screwed and fixed in the threaded hole (13) of the nut (1) to press and fix the electrode joint (4), and the surface of the internal threaded hole (13) of the nut (1) and the surface of the external thread of the bolt (2) are tinned.

2. The grounding nut and bolt assembly according to claim 1, wherein: A first through hole (12) and a second through hole (14) are coaxially arranged on the top of the nut (1), the first through hole (12) being connected to the internal threaded hole (13); the diameter of the first through hole (12) is larger than the diameter of the second through hole (14); and the blocking member (3) is fixedly installed in the first through hole (12) and the second through hole (14) by riveting and sealing.

3. The grounding nut and bolt assembly according to claim 2, wherein: The diameter of the first through hole (12) is 1.1-2 times the diameter of the second through hole (14).

4. The grounding nut and bolt assembly according to claim 1, wherein: A hexagonal tool surface (15) is provided on the outer wall of the nut (1), and an octagonal tool surface (24) is provided on the head (21) of the bolt (2).

5. The grounding nut and bolt assembly according to claim 1, wherein: The bottom surface of the head (21) of the bolt (2) is provided with a welding ring (22).

6. The grounding nut and bolt assembly according to claim 5, wherein: The bottom surface of the welding ring (22) has a blind hole (23).

7. The grounding nut and bolt assembly according to claim 1, wherein: A first boss (16) is formed on the bottom surface of the nut (1), and a second boss (25) having the same shape and size as the first boss (16) is formed on the top surface of the head (21) of the bolt (2).

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