Grounding bolt assembly for automobile ultrathin steel plate

Abstract

The utility model belongs to the technical field of grounding bolts, and particularly relates to a grounding bolt assembly for an automobile ultrathin steel plate, which comprises a screw, a nut pair mounted in the middle of the screw in a threaded manner, a bolt head fixedly mounted at the lower end of the screw, a nut mounted at the upper end of the screw in a threaded manner, and a connector lug arranged between the nut and the nut pair. And the first reaming block is fixedly installed on one side of the nut pair, the screw rod is in threaded connection with the first reaming block, and a plurality of evenly-distributed first ribs are fixedly installed on the outer wall of the first reaming block. According to the utility model, the second reaming block is inserted into the hole in the connector lug by tightening the nut, an oxide layer at the hole of the connector lug is scraped off under the extrusion and rotation of the second rib and the second reaming block, and the connector lug and the second reaming block can be tightly attached to maintain good conductivity.

Description

Technical Field

[0001] This utility model belongs to the field of grounding bolt technology, and in particular relates to a grounding bolt assembly for ultra-thin steel plates in automobiles. Background Technology

[0002] A grounding bolt is a bolt used to connect and fasten the negative terminal wiring harness (i.e., the terminal block) of an automotive electrical system to the vehicle body. It plays an important role in automotive circuits.

[0003] However, the existing grounding bolts have poor sealing at the connection with the car body steel plate, and moisture in the air can easily corrode the connection, resulting in poor conductivity. Secondly, the wire ends are exposed to air during production and storage, which causes an oxide layer to form on the surface, thus affecting conductivity.

[0004] In view of this, we propose a grounding bolt assembly for ultra-thin steel sheets in automobiles. Utility Model Content

[0005] The purpose of this invention is to provide a grounding bolt assembly for ultra-thin steel plates in automobiles, so as to solve the problems mentioned in the background art.

[0006] In view of this, the present invention provides a grounding bolt assembly for ultra-thin steel plates in automobiles, comprising: a screw rod, a nut pair threadedly installed in the middle of the screw rod, a bolt head fixedly installed at the lower end of the screw rod, a nut threadedly installed at the upper end of the screw rod, and a terminal block provided between the nut and the nut pair;

[0007] The first expanding block is fixedly installed on one side of the nut pair, the screw is threadedly connected to the first expanding block, and a plurality of evenly distributed first ribs are fixedly installed on the outer wall of the first expanding block;

[0008] The two wax injection grooves are respectively opened on the opposite side of the nut pair and the bolt head, and the inner wall of the two wax injection grooves is fitted with a second rubber ring;

[0009] A protective component is installed at the other end of the nut assembly to protect the entire nut assembly.

[0010] A hole enlarging assembly, which is installed at the bottom of the nut, is used to enlarge the opening on the connector.

[0011] In the above technical solution, the protective component further includes a protective cover, which is installed between the nut and the bolt, and a first rubber ring is fixedly installed at the bottom of the protective cover.

[0012] In the above technical solution, the hole-expanding assembly further includes a second hole-expanding block, which is fixedly installed at the bottom of the nut and threadedly connected to the screw. The outer wall of the second hole-expanding block is fixedly equipped with a plurality of evenly distributed second ribs.

[0013] In the above technical solution, furthermore, the gaps between the two second rubber rings and the two wax injection grooves are all provided with sealing wax, and the outer side walls of the two second rubber rings are provided with multiple evenly distributed strip grooves. The cross-sections of the wax injection grooves and the second rubber rings are both trapezoidal.

[0014] In the above technical solution, a car body steel plate is further provided between the nut pair and the bolt head.

[0015] In the above technical solution, further, an adapter groove is provided on the side of the bolt head near the nut pair, and the adapter groove is sleeved with the first enlarged hole block.

[0016] In the above technical solution, the top of the nut assembly is provided with an installation groove, the opening end of the connector passes through the protective cover and is installed in the installation groove, and the upper end of the threaded hole of the nut assembly is provided with a chamfer, which is sleeved with the second enlarging block.

[0017] The beneficial effects of this utility model are:

[0018] 1. This grounding bolt assembly for ultra-thin steel plates in automobiles, by tightening the nut pair, causes the two second rubber rings to be completely squeezed into the wax injection groove, and squeezes out the sealing wax in the wax injection groove, thereby sealing both sides of the second rubber rings, so that the connection between the bolt head, the steel plate of the automobile body and the nut pair is isolated from the outer diameter, and the corrosion of the connection by moisture in the air is prevented.

[0019] 2. The grounding bolt assembly for ultra-thin steel plates in automobiles, by tightening the nut, allows the second expanding block to be inserted into the opening of the connector. Under the squeezing and rotation of the second rib and the second expanding block, the oxide layer at the opening of the connector is scraped off, and the connector and the second expanding block can fit tightly together to maintain good conductivity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a schematic diagram of the protective cover in this utility model;

[0023] Figure 4 This is a schematic diagram of the nut in this utility model;

[0024] Figure 5 This is a schematic diagram of the nut assembly in this utility model;

[0025] Figure 6 This is a schematic diagram of the screw in this utility model;

[0026] Figure 7 This is a cross-sectional view of the nut assembly in this utility model;

[0027] Figure 8 This is a cross-sectional view of the bolt head of this utility model.

[0028] The markings in the diagram are as follows:

[0029] 1. Nut; 2. Protective cover; 3. Automotive body steel plate; 4. Bolt head; 5. Terminal; 6. Nut pair; 7. Screw; 8. First rubber ring; 9. Second rubber ring; 10. First reaming block; 11. First rib; 12. Adaptor groove; 13. Wax injection groove; 14. Mounting groove; 15. Chamfer; 16. Second reaming block; 17. Second rib. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. Example

[0035] Please see Figure 1-8 As shown in the figure, this embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles, including a screw 7, a nut pair 6 threadedly installed in the middle of the screw 7, a bolt head 4 fixedly installed at the lower end of the screw 7, a nut 1 threadedly installed at the upper end of the screw 7, and a terminal 5 provided between the nut 1 and the nut pair 6;

[0036] The first expanding block 10 is fixedly installed on one side of the nut pair 6. The screw 7 is threadedly connected to the first expanding block 10. Multiple evenly distributed first ribs 11 are fixedly installed on the outer wall of the first expanding block 10.

[0037] Wax injection groove 13, two wax injection grooves 13 are respectively opened on the opposite side of the nut pair 6 and the bolt head 4, and the inner wall of the two wax injection grooves 13 is fitted with a second rubber ring 9;

[0038] A protective component is installed at the other end of the nut assembly 6 to protect the entire nut assembly 6.

[0039] A hole enlarging assembly is installed at the bottom of the nut 1 and is used to enlarge the opening on the connector 5.

[0040] In this process, by rotating the nut assembly 6, the nut assembly 6 moves closer to the car body steel plate 3 along the screw 7. When the first expanding block 10 on the nut assembly 6 is aligned with the reserved hole on the car body steel plate 3 and continues to be rotated and inserted, the first rib 11 scrapes off the plating layer inside the reserved hole. At the same time, since the outer diameter of the first expanding block 10 gradually increases, the inner hole of the car body steel plate 3 expands under the action of extrusion force, so that the inner side of the reserved hole of the car body steel plate 3 is tightly attached to the first expanding block 10. Meanwhile, the plating layer on the surface of the first expanding block 10 is scraped off by the car body steel plate 3 to ensure good conductivity. By continuing to tighten the nut assembly 6, the two second rubber rings 9 are completely squeezed into the wax injection groove 13, and the sealing wax in the wax injection groove 13 is squeezed out, thereby sealing both sides of the second rubber rings 9, so that the connection between the bolt head 4, the car body steel plate 3 and the nut assembly 6 is isolated from the outer diameter. Example

[0041] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: the protective assembly includes a protective cover 2, which is installed between the nut 1 and the nut pair 6, and a first rubber ring 8 is fixedly installed at the bottom of the protective cover 2.

[0042] By tightening the nut 1, the protective cover 2 and the car body steel plate 3 will compress the first rubber ring 8, thereby sealing the connection between the protective cover 2 and the car body steel plate 3, and thus achieving further sealing protection for the nut assembly 6. Example

[0043] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: the hole-expanding assembly includes a second hole-expanding block 16, the second hole-expanding block 16 is fixedly installed at the bottom of the nut 1, and the second hole-expanding block 16 is threadedly connected to the screw 7. A plurality of evenly distributed second ribs 17 are fixedly installed on the outer wall of the second hole-expanding block 16.

[0044] In this process, by tightening the nut 1, the second expanding block 16 is inserted into the opening on the connector 5. Under the squeezing and rotation of the second rib 17 and the second expanding block 16, the oxide layer at the opening of the connector 5 is scraped off, and the connector 5 and the second expanding block 16 can fit tightly together to maintain good conductivity. Example

[0045] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: the gaps between the two second rubber rings 9 and the two wax injection grooves 13 are all provided with sealing wax; the outer walls of the two second rubber rings 9 are provided with multiple evenly distributed strip grooves; and the cross-sections of the wax injection grooves 13 and the second rubber rings 9 are both trapezoidal.

[0046] The second rubber ring 9 has multiple evenly distributed strip grooves on its outer side wall, so that when the second rubber ring 9 is squeezed, the sealing wax at the bottom of the wax injection groove 13 will be evenly squeezed out along the strip grooves to the connection between the second rubber ring 9 and the steel plate of the car body, thereby achieving a seal. Example

[0047] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: an automobile body steel plate 3 is provided between the nut pair 6 and the bolt head 4.

[0048] The inner diameter of the reserved hole on the car body steel plate 3 is smaller than the outer diameter of the first enlarged hole block 10, so that the two can be interference-fitted to ensure good contact. Example

[0049] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: the bolt head 4 has an adapter groove 12 on the side near the nut assembly 6, and the adapter groove 12 is sleeved with the first enlarged hole block 10.

[0050] The fitting groove 12 and the first enlarged hole block 10 are connected to allow the bolt head 4 to fit closer to the nut assembly 6. Example

[0051] This embodiment provides a grounding bolt assembly for ultra-thin steel plates in automobiles. In addition to the technical solutions of the above embodiments, it also has the following technical features: the top of the nut assembly 6 is provided with an installation groove 14, the opening end of the connector 5 passes through the protective cover 2 and is installed in the installation groove 14, and the upper end of the threaded hole of the nut assembly 6 is provided with a chamfer 15, which is sleeved with the second enlarged hole block 16.

[0052] The chamfer 15 is connected to the second enlarged hole block 16, so that the nut assembly 6 can fit closer to the nut 1, thereby clamping the connector 5.

[0053] Working principle: When it is necessary to connect the connector 5 to the car body steel plate 3, first insert one end of the screw 7 into the reserved hole in the car body steel plate 3, then press the bolt head 4 against one side of the car body steel plate 3 and use a wrench to restrict the rotation of the bolt head 4, then assemble the nut assembly 6 with the screw 7, and by rotating the nut assembly 6, make the nut assembly 6 move closer to the car body steel plate 3 along the screw 7. When the first enlarging block 10 on the nut assembly 6 is aligned with the reserved hole on the car body steel plate 3 and the rotation continues, the first... The rib 11 scrapes off the plating inside the pre-drilled hole. Simultaneously, because the outer diameter of the first expanding block 10 gradually increases, the inner hole of the car body steel plate 3 expands under the extrusion pressure, causing the inner side of the pre-drilled hole of the car body steel plate 3 to tightly adhere to the first expanding block 10. At the same time, the plating on the surface of the first expanding block 10 is scraped off by the car body steel plate 3, ensuring good conductivity. The portion of the first expanding block 10 that passes through the car body steel plate 3 is inserted into the adapter groove 12. When both second rubber rings 9 are in contact with the car body steel plate 3... By continuing to tighten the nut assembly 6, the two second rubber rings 9 are completely squeezed into the wax injection groove 13, and the sealing wax in the wax injection groove 13 is squeezed out, thereby sealing both sides of the second rubber rings 9, isolating the connection between the bolt head 4, the car body steel plate 3 and the nut assembly 6 from the outer diameter. Then, the open end of the connector 5 is inserted into the protective cover 2, and then the protective cover 2 is passed through the upper end of the screw 7, with the screw 7 passing through the open end of the connector 5. The tightening stops when the open end of the connector 5 is fully engaged with the mounting groove 14. Finally, the... The nut 1 is screwed in from the top of the screw 7. During the tightening process, the second enlarging block 16 and the second rib 17 on the nut 1 will scrape off the oxide layer and enlarge the hole at the opening of the connector 5 in the same way. By setting the chamfer 15, a space is reserved for the second enlarging block 16 to be inserted. During this process, under the pressure of the nut 1, the protective cover 2 and the car body steel plate 3 will squeeze the first rubber ring 8, so that the connection between the protective cover 2 and the car body steel plate 3 is sealed, thereby achieving further sealing protection for the nut assembly 6.

[0054] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A grounding bolt assembly for ultra-thin steel plates in automobiles, characterized in that, include: A screw (7) is threaded with a nut pair (6) in the middle of the screw (7), a bolt head (4) is fixedly installed at the lower end of the screw (7), a nut (1) is threaded at the upper end of the screw (7), and a connector (5) is provided between the nut (1) and the nut pair (6). The first expanding block (10) is fixedly installed on one side of the nut pair (6), and the screw (7) is threadedly connected to the first expanding block (10). Multiple evenly distributed first ribs (11) are fixedly installed on the outer wall of the first expanding block (10). Wax injection grooves (13), the two wax injection grooves (13) are respectively opened on the opposite side of the nut pair (6) and the bolt head (4), and the inner walls of the two wax injection grooves (13) are fitted with second rubber rings (9). A protective component is installed at the other end of the nut assembly (6) to protect the entire nut assembly (6); A hole enlarging assembly is installed at the bottom of the nut (1) and is used to enlarge the opening on the connector (5).

2. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, The protective component includes a protective cover (2), which is installed between the nut (1) and the nut pair (6), and a first rubber ring (8) is fixedly installed at the bottom of the protective cover (2).

3. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, The hole-expanding assembly includes a second hole-expanding block (16), which is fixedly installed at the bottom of the nut (1) and threadedly connected to the screw (7). Multiple evenly distributed second ribs (17) are fixedly installed on the outer wall of the second hole-expanding block (16).

4. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, Sealing wax is provided in the gaps between the two second rubber rings (9) and the two wax injection grooves (13). The outer walls of the two second rubber rings (9) are provided with multiple evenly distributed strip grooves. The cross-sections of the wax injection grooves (13) and the second rubber rings (9) are trapezoidal.

5. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, A car body steel plate (3) is provided between the nut pair (6) and the bolt head (4).

6. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, The bolt head (4) has an adapter groove (12) on the side near the nut pair (6), and the adapter groove (12) is sleeved with the first enlarged hole block (10).

7. A grounding bolt assembly for ultra-thin steel plates in automobiles according to claim 1, characterized in that, The nut assembly (6) has an installation groove (14) at the top. The opening end of the connector (5) passes through the protective cover (2) and is installed in the installation groove (14). The upper end of the threaded hole of the nut assembly (6) has a chamfer (15), which is sleeved with the second enlarged hole block (16).

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