Middleware of blind hole nut and blind hole nut

Abstract

The utility model provides a blind hole nut middleware and a blind hole nut, and the blind hole nut middleware comprises a main body part which is provided with a through hole along the axial direction; the plugging part can be plugged at one end of the through hole; the plugging part and the inner wall of the through hole are connected in an integrated or split mode. The middleware of the blind hole nut comprises the main body part provided with the through hole and the plugging part capable of plugging one end of the through hole, and the anti-corrosion coating is applied to the inside and the outside of the main body part before the plugging part plugs the through hole final-forming blind hole nut, so that the quality of the anti-corrosion coating of the final-forming blind hole nut can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and particularly relates to an intermediate part of a blind hole nut and a blind hole nut. Background Technology

[0002] With the changes and development of markets such as new energy vehicles, the quality requirements for products are becoming increasingly stringent. For example, blind hole nuts used to connect automotive parts generally have anti-corrosion coatings applied to their inner and outer surfaces through processes such as electroplating to extend their effective lifespan. The anti-corrosion coating on the outer surface usually meets the preset requirements, but... Figure 1 As shown, during the electroplating process, since the inside of the nut is a blind hole 8, the electroplating solution does not circulate within it. Therefore, the quality of the anti-corrosion coating formed inside the blind hole 8 of the blind hole nut is often substandard (e.g., insufficient coating thickness, uneven thickness, etc.), which cannot meet the application scenarios of some high-quality inner holes. Utility Model Content

[0003] In view of the problems existing in the prior art, the main purpose of this utility model is to provide an intermediate part for a blind hole nut and a blind hole nut. The intermediate part for the blind hole nut includes a main body with a through hole and a sealing part that can seal one end of the through hole. Before the blind hole nut is finally formed by sealing the through hole with the sealing part, an anti-corrosion coating is applied to the inside and outside of the main body, which can effectively improve the quality of the anti-corrosion coating of the final blind hole nut.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] This utility model provides an intermediate component for a blind hole nut, the intermediate component of which includes:

[0006] The main body has a through hole along its axial direction;

[0007] A sealing part, wherein the sealing part is capable of sealing one end of the through hole;

[0008] The sealing part is either integrally connected to the inner wall of the through hole or separately connected.

[0009] As a further description of the above technical solution, when the sealing part is integrally connected to the inner wall of the through hole, the sealing part is a protrusion formed by the main body protruding outward from the inner wall of the through hole along the axial direction.

[0010] The protrusion can deform inward relative to the through hole to form a deformable part that fits against the inner wall of the through hole, and the deformable part is used to block the opening of the through hole.

[0011] As a further description of the above technical solution, when the sealing part and the inner wall of the through hole are connected separately, the sealing part is made of plastic or elastic material.

[0012] As a further description of the above technical solution, the inner wall used to form the through hole includes at least a first inner peripheral wall and a second inner peripheral wall; wherein,

[0013] The first inner peripheral wall is used to fit against the circumferential outer edge of the sealing part;

[0014] The second inner peripheral wall has threads formed.

[0015] As a further description of the above technical solution, the inner diameter of the first inner peripheral wall gradually narrows from the end adjacent to the second inner peripheral wall to the end away from the second inner peripheral wall; or,

[0016] The inner diameter of the first inner peripheral wall is constant from the end adjacent to the second inner peripheral wall to the end away from the second inner peripheral wall.

[0017] As a further description of the above technical solution, before the sealing part blocks the through hole, an anti-corrosion coating is applied to the surface of the main body.

[0018] This utility model also provides a blind hole nut, comprising:

[0019] The main body has a through hole along its axial direction;

[0020] A sealing part is provided, which is placed at one end of the through hole; the sealing part is integrally connected to the inner wall of the through hole or is separately connected.

[0021] As a further description of the above technical solution, before the sealing part blocks the through hole, an anti-corrosion coating is applied to the surface of the main body.

[0022] Based on the above technical solutions, the outstanding effects of this utility model are as follows:

[0023] The blind hole nut provided by this utility model includes a main body and a sealing part. The main body has a through hole along its axial direction. The sealing part is integrally connected to the inner wall of the through hole or is connected separately. Thus, a surface anti-corrosion coating can be applied to the main body first, for example, through an electroplating process. During the electroplating process, the electroplating solution can circulate in the through hole provided along the axial direction of the main body, so that the anti-corrosion coating on the inner surface of the main body (i.e., the inner wall of the through hole) and the anti-corrosion coating on its outer surface can achieve the preset parameters (including coating thickness, uniformity, etc.) required for high quality. Then, the sealing part that can seal one end of the through hole can be used to seal the through hole, making it a blind hole, thereby obtaining a blind hole nut. After the sealing part seals the through hole, the external structure of the obtained blind hole nut is no different from that of a conventional blind hole nut, so its usage method is also unchanged. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a blind hole nut in the prior art;

[0025] Figure 2 This is a schematic diagram of the structure of the intermediate component of the blind hole nut in the first embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the blind hole nut in the first embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the intermediate component of the blind hole nut in the second embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the blind hole nut in the second embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the blind hole nut in the third embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the blind hole nut in the fourth embodiment of this utility model.

[0031] Explanation of icon numbers:

[0032] 1. Main body; 2. Through hole; 3. Sealing part; 4. Deformation part; 5. First inner peripheral wall; 6. Second inner peripheral wall; 7. Thread; 8. Blind hole; 9. Workpiece. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0035] Please see Figures 2 to 7 This utility model discloses an intermediate component for a blind hole nut and a blind hole nut, wherein the intermediate component for the blind hole nut includes:

[0036] Main body 1, wherein the main body 1 is provided with a through hole 2 along its axial direction;

[0037] The sealing part 3 is capable of sealing one end of the through hole 2;

[0038] The sealing part 3 is integrally connected to the inner wall of the through hole 2 or is separately connected.

[0039] With the above structure, a surface anti-corrosion coating can be applied to the main body 1 first, for example, through an electroplating process. During the electroplating process, the electroplating solution can circulate within the through hole 2 provided along the axial direction of the main body 1, so that the anti-corrosion coating on the inner surface of the main body 1 (i.e., the inner wall surface of the through hole 2) and the anti-corrosion coating on its outer surface can achieve the preset parameters (including coating thickness, uniformity, etc.) required for high quality. Then, the sealing part 3, which is integrally connected or separately connected to the inner wall of the through hole 2, is used to seal one end of the through hole 2, so that the through hole 2 becomes a blind hole 8, and the intermediate part of the blind hole nut is finally formed into a blind hole nut. After the through hole 2 is sealed by the sealing part 3, it will not affect the external structure of the blind hole nut after it is finally formed. That is, the blind hole nut formed using the intermediate part of the blind hole nut provided in this embodiment is used in the same way as a conventional blind hole nut.

[0040] Please see Figures 2 to 3 Specifically, in the first embodiment, the sealing part 3 is integrally connected to the inner wall of the through hole 2. It is a protrusion formed by the main body 1 protruding axially outward from the inner wall of the through hole 2. An external tool can be used to deform the protrusion inward relative to the through hole 2, gradually forming a deformable part 4 that fits against the inner wall of the through hole 2, thereby sealing the opening of the through hole 2 and turning it into a blind hole 8. It should be understood that the deformable part 4 is accommodated at one end of the through hole 2, completely sealing the opening of the through hole 2, and has a certain length axially inward from the opening of the through hole 2, with a total volume the same as the protrusion.

[0041] Specifically, in this embodiment, the inner wall used to form the through hole 2 includes a first inner peripheral wall 5 and a second inner peripheral wall 6; wherein, the first inner peripheral wall 5 is used to fit against the circumferential outer edge of the deformed part 4 obtained by the deformation of the sealing part 3, and the second inner peripheral wall 6 is formed with a thread 7, so that a fastener adapted to it can be threadedly connected, such as a bolt.

[0042] Specifically, in this embodiment, the inner diameter of the first inner peripheral wall 5 is constant from the end adjacent to the second inner peripheral wall 6 to the end away from the second inner peripheral wall 6.

[0043] Specifically, in this embodiment, before the sealing part 3 is deformed into the through hole 2 by means of a workpiece to form the deformed part 4, an anti-corrosion coating is applied to the surface of the main body 1 by processes such as electroplating. The surface of the main body 1 includes its outer surface and the inner wall of the through hole 2.

[0044] Please see Figures 4 to 7Specifically, in the second, third, and fourth embodiments, unlike the first embodiment, the sealing part 3 and the inner wall of the through hole 2 are connected separately.

[0045] Please see Figure 4 and Figure 5 Specifically, in the second embodiment, the sealing part 3 is made of a plastic material (e.g., iron) and is generally cylindrical, such as a plug. The inner diameter of the first inner peripheral wall 5 within the through hole 2 remains constant from its end adjacent to the second inner peripheral wall 6 to its end away from the second inner peripheral wall 6. It should be understood that, in this case, to ensure excellent sealing performance of the sealing part 3 on the through hole 2, the inner diameter of the first inner peripheral wall 5 needs to be slightly smaller than the outer diameter of the sealing part 3. After applying an anti-corrosion coating to the surface of the main body 1 through processes such as electroplating, the sealing part 3 can be pressed into the receiving space formed by the first inner peripheral wall 5 using an interference fit. Alternatively, if the sealing part 3 is made of a metallic plastic material, an anti-corrosion coating can be applied to its surface in advance, thereby ensuring that the blind hole nut ultimately formed by it and the main body 1 has excellent corrosion resistance.

[0046] Please see Figure 6 Specifically, in the third embodiment, the sealing part 3 is still made of plastic material. Unlike the second embodiment, it is in the shape of a gasket, so that the inner diameter of the first inner peripheral wall 5 that constitutes the inner wall of the through hole 2 gradually shrinks from the end near the second inner peripheral wall 6 to the end away from the second inner peripheral wall 6. Thus, when an anti-corrosion coating is applied to the surface of the main body 1 through processes such as electroplating, the first inner peripheral wall 5 can be deformed radially inward through processes such as closing and pressing, so that the first peripheral wall fits with the circumferential outer edge of the sealing part 3, thereby the sealing part 3 can block the opening of the through hole 2, making the through hole 2 a blind hole 8.

[0047] Please see Figure 7 Specifically, in the fourth embodiment, unlike the second and third embodiments, the sealing part 3 is made of an elastic material, such as silicone. After an anti-corrosion coating is applied to the surface of the main body 1 through processes such as electroplating, the sealing part 3 can be directly inserted into the first inner peripheral wall 5, so that the first peripheral wall fits against the circumferential outer edge of the sealing part 3, thereby the sealing part 3 can block the opening of the through hole 2, making the through hole 2 a blind hole 8.

[0048] Please see Figure 3 ,as well as Figures 5 to 7Specifically, the blind hole nut disclosed in this utility model includes a main body 1 and a sealing part 3. The main body 1 has a through hole 2 along its axial direction. The sealing part 3 seals one end of the through hole 2, and the sealing part 3 is integrally connected to the inner wall of the through hole 2 or separately connected. However, it should be understood that regardless of whether the sealing part 3 is integrally connected to the inner wall of the through hole 2 or separately connected, the final sealing effect can reach the preset standard. More specifically, the surface of the main body 1 (including the outer surface of the main body 1 and the inner wall of the through hole 2) is coated with an anti-corrosion coating, and the anti-corrosion coating is applied by electroplating or other processes before the sealing part 3 seals the through hole 2. The exterior of the main body 1 is still consistent with that of a conventional blind hole nut, for example, including a rod, a flange, and a head connected sequentially along the axial direction, and its outer wall is provided with corresponding riveting parts to connect the workpiece 9 (e.g., a plate).

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any changes, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intermediate component for a blind hole nut, characterized in that, include: The main body has a through hole along its axial direction; A sealing part, wherein the sealing part is capable of sealing one end of the through hole; The sealing part is integrally connected to the inner wall of the through hole or is separately connected; before the sealing part seals the through hole, an anti-corrosion coating is applied to the surface of the main body.

2. The intermediate component of the blind hole nut according to claim 1, characterized in that, When the sealing part is integrally connected to the inner wall of the through hole, the sealing part is a protrusion formed by the main body protruding outward from the inner wall of the through hole along the axial direction; The protrusion can deform inward relative to the through hole to form a deformable part that fits against the inner wall of the through hole, and the deformable part is used to block the opening of the through hole.

3. The intermediate component of the blind hole nut according to claim 1, characterized in that, When the sealing part is connected to the inner wall of the through hole separately, the sealing part is made of plastic or elastic material.

4. The intermediate component of the blind hole nut according to claim 1, characterized in that, The inner wall used to form the through hole includes at least a first inner peripheral wall and a second inner peripheral wall; wherein, The first inner peripheral wall is used to fit against the circumferential outer edge of the sealing part; The second inner peripheral wall has threads formed.

5. The intermediate component of the blind hole nut according to claim 4, characterized in that, The inner diameter of the first inner peripheral wall gradually narrows from the end adjacent to the second inner peripheral wall to the end away from the second inner peripheral wall; or, The inner diameter of the first inner peripheral wall is constant from the end adjacent to the second inner peripheral wall to the end away from the second inner peripheral wall.

6. A blind hole nut, characterized in that, include: The main body has a through hole along its axial direction; The sealing part is located at one end of the through hole; the sealing part is integrally connected to the inner wall of the through hole or is separately connected; before the sealing part seals the through hole, an anti-corrosion coating is applied to the surface of the main body.

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