Fastener and pressing rivet injection molding fastening structure

Abstract

The utility model provides a fastener and a pressing rivet injection molding fastening structure. The fastener comprises a main body part and a flange part, and the main body part is provided with a first end and a second end in the axis direction of the main body part; the flange part is arranged on the outer wall of the main body part in the axial direction of the main body part, and a bearing face abutting against a plate is arranged on the side, facing the second end of the main body part, of the flange part; the outer wall of the first end of the main body part is provided with a groove which is sunken inwards in the radial direction; a threaded hole is formed in the main body part, extends from the interior of the main body part to the second end of the main body part, and is provided with a guide surface which forms a 60-degree guide angle with the plane of the second end of the main body part; the outer wall of the second end of the main body part is sequentially provided with a guide part, a material containing part and a material discharging part in the axis direction of the main body part, the material discharging part is adjacent to the flange part and located on one side of the bearing face of the flange part, and a material discharging step is formed by the material discharging part and the bearing face. And meanwhile, the method is suitable for plastic structures without anti-push-out force on the axis.

Description

Technical Field

[0001] This application belongs to the technical field of fasteners, and particularly relates to a fastener and a press-fit injection molding fastening structure. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] With the development of new energy vehicles, circuit systems are becoming increasingly complex and diverse. In limited space, we often encounter long and narrow busbars, or situations where bends and openings are very close. To address these issues, it is necessary to design a connection structure between fasteners and narrow-edge plates.

[0004] In existing technologies, welding may be used for connection. Welding schemes require additional control over heat and weld slag. High temperature and heat can damage the original structural performance, affecting the overall strength and reliability of the structure. The process is also relatively complex.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this application is to provide a fastener and a press-fit injection molding fastening structure to solve the above problems.

[0007] This application provides a fastener comprising:

[0008] The main body has a first end and a second end along its axial direction;

[0009] A flange portion is provided on the outer wall of the main body portion along the axial direction of the main body portion, and a bearing surface that abuts against the plate is provided on the side of the flange portion facing the second end of the main body portion;

[0010] The outer wall of the first end of the main body is provided with a groove that is recessed inward along its radial direction;

[0011] The main body has a threaded hole inside, which extends from the inside of the main body to the second end of the main body. The threaded hole has a guide surface that forms a 60° guide angle with the plane of the second end of the main body.

[0012] The outer wall of the second end of the main body is provided with a guide part, a material receiving part and a material discharging part in sequence along its axial direction. The material discharging part is adjacent to the flange part and is located on the bearing surface side of the flange part. The material discharging part and the bearing surface form a material discharging step.

[0013] Furthermore, in the aforementioned fastener, the outer diameter of the guide portion is smaller than the outer diameter of the discharge portion, and the diameter of the receiving portion gradually increases from the discharge portion to the guide portion. A receiving groove is formed between the receiving portion and the discharge portion to accommodate the material flowing on the plate due to deformation.

[0014] Furthermore, in the aforementioned fastener, the outer wall of the discharge section is provided with knurled teeth.

[0015] Furthermore, in the aforementioned fasteners, the threaded hole is either a blind hole or a through hole.

[0016] This application also provides a press-fit injection molding fastening structure, including:

[0017] A fastener comprising a body portion and a flange portion, the body portion having a first end and a second end along its axial direction; the flange portion being disposed on the outer wall of the body portion along the axial direction of the body portion, the flange portion having a bearing surface abutting against a plate on the side facing the second end of the body portion, the outer wall of the first end of the body portion having a groove recessed radially inward; the body portion having a threaded hole extending from the interior of the body portion to the second end of the body portion, the threaded hole having a guide surface forming a 60° guide angle with the plane of the second end of the body portion; the outer wall of the second end of the body portion having a guide portion, a receiving portion and a discharging portion sequentially arranged along its axial direction, the discharging portion being adjacent to the flange portion and located on the bearing surface side of the flange portion, the discharging portion and the bearing surface forming a discharging step;

[0018] The plate has a narrow edge spacing structure and is provided with mounting holes for riveting with the fasteners. Part of the material in the mounting holes is deformed by extrusion and flows through the guide part to the material receiving part and the material discharging part forming the material receiving groove.

[0019] A plastic part is wrapped around the outer wall of the sheet metal along the axial direction and the outer wall of the fastener, and the plastic part also fills the gap between the fastener and the sheet metal. A portion of the material of the plastic part flows into the groove after being extruded and deformed.

[0020] Furthermore, in the aforementioned press-fit injection molding fastening structure, the sheet metal is made of copper.

[0021] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0022] The fasteners and press-fit injection molding fastening structures described in this utility model can be used for narrow-margin plates with limited space, and are also suitable for structures where the plastic lacks anti-pull-out force on the axis. By setting a smaller guide angle for the threaded hole and changing the 90° chamfer to 60°, the risk of the fastener not passing through the thread gauge after installation can be mitigated. The material receiving groove accommodates the material flowing from the plate during extrusion deformation. The anti-pull-out force structure formed by the material receiving part allows the connected plates to form a blocking structure with the material receiving part, thus providing the plates with anti-detachment capability after connection. The knurled tooth structure of the discharge part has intervals that can form an anti-torque structure, allowing the material of the plate to be squeezed into the intervals, thus providing the plates with anti-rotation capability after connection. Part of the plastic part material flows into the groove after extrusion deformation, and the groove provides anti-pull-out capability after the plastic part is injection molded. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the fastener provided in the embodiments of this application;

[0025] Figure 2 This is a half-sectional schematic diagram of the fastener provided in the embodiments of this application;

[0026] Figure 3 This is an exploded view of the fasteners and plates before installation, as provided in the embodiments of this application;

[0027] Figure 4 This is a cross-sectional view of the fasteners and plates provided in the embodiments of this application after installation;

[0028] Figure 5 This is a cross-sectional view of the fasteners, sheet metal, and plastic parts after installation, as provided in the embodiments of this application.

[0029] Figure 6 This is a half-sectional view of the fasteners, sheet metal, and plastic parts after installation, as provided in the embodiments of this application.

[0030] In the diagram: 100, Fastener; 1, Main body; 2, Flange; 3, Guide; 4, Material holding part; 5, Material discharge part; 6, Groove; 7, Threaded hole; 8, Guide surface; 200, Press-fit injection molding fastening structure; 21, Sheet metal; 22, Mounting hole; 31, Plastic part. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0032] In the description of this utility model, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," and "rear," 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. 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.

[0033] Reference Figure 1 and Figure 2 This application provides a fastener 100, including: a main body 1, the main body 1 having a first end and a second end along its axial direction;

[0034] Flange 2 is provided on the outer wall of the main body 1 along the axial direction of the main body 1, and the flange 2 has a bearing surface that abuts against the plate 21 on the side facing the second end of the main body 1.

[0035] The outer wall of the first end of the main body 1 is provided with a groove 6 that is recessed inward along its radial direction;

[0036] The main body 1 has a threaded hole 7 inside, which extends from the inside of the main body 1 to the second end of the main body 1. The threaded hole 7 has a guide surface 8 that forms a 60° guide angle with the plane of the second end of the main body 1.

[0037] The outer wall of the second end of the main body 1 is provided with a guide part 3, a material receiving part 4 and a material discharging part 5 in sequence along its axial direction. The material discharging part 5 is adjacent to the flange part 2 and is located on the bearing surface side of the flange part 2. The material discharging part 5 and the bearing surface form a material discharging step.

[0038] With the above structure, the form and number of grooves 6 can be adjusted according to the actual situation, and can be set as trapezoidal, circular, rectangular, etc. In this embodiment, due to the limitation of the position of the plate 21, the guide surface 8 has a small diameter of mounting hole 22, a narrow distance from the center of the hole to the edge, and a thin wall thickness. It is not suitable to directly open a countersunk hole at the riveting point. The outer ring of the main body 1 is placed in the mounting hole 22. During riveting, the plate 21 needs to be squeezed into the material receiving part 4. In order to prevent the thread from deforming, the guide angle is set to be smaller, and the 90° chamfer is changed to 60°. This makes it possible to make the first thread in the threaded hole 7 at the thicker material discharge part 5, which can alleviate the risk of the fastener not passing the thread gauge after installation with the plate 21.

[0039] The material discharge section 5 can be interlocked with the sheet 21 during the connection process. In this embodiment, the flange section 2 has a double-cut edge structure. In other embodiments, the flange section 2 can also be configured into other suitable shapes according to actual needs, such as waist-shaped flange, single-cut edge flange, special polygon, etc. It can be applied to the side with position restrictions. On the side without position restrictions, the support area can be maximized to meet the application requirements of special positions. Under injection molding conditions, since it is not a full circle, it can provide additional torsional resistance.

[0040] Specifically, in this embodiment, the outer diameter of the guide portion 3 is smaller than the outer diameter of the discharge portion 5, and the diameter of the receiving portion 4 gradually increases from the discharge portion 5 to the guide portion 3. A receiving groove is formed between the receiving portion 4 and the discharge portion 5 to accommodate the material flowing on the plate 21 due to deformation. The receiving groove accommodates the material flowing on the plate 21 during extrusion deformation. The anti-pull-out force structure formed by the receiving portion 4 allows the connected plate 21 and the receiving portion 4 to form a blocking structure, thereby enabling the plate 21 to have the ability to prevent detachment after connection.

[0041] Specifically, in this embodiment, the outer wall of the discharge section 5 is provided with knurled teeth. The discharge section 5 with knurled teeth can be squeezed into the material of the plate 21 during the connection process. There are gaps in the knurled teeth structure, which can form an anti-torque structure. The material of the plate 21 can be squeezed into the gaps, so that the plate 21 has the ability to resist rotation after connection.

[0042] Specifically, in this embodiment, the threaded hole 7 is a blind hole or a through hole. While the threaded hole 7 is set as a blind hole in this embodiment, it can be adjusted to a through hole in other embodiments depending on the usage environment.

[0043] Reference Figures 3 to 6 This specification also provides a press-fit injection molding fastening structure 200, comprising:

[0044] Fastener 100, comprising a body portion 1 and a flange portion 2, wherein the body portion 1 has a first end and a second end along its axial direction; the flange portion 2 is disposed on the outer wall of the body portion 1 along the axial direction of the body portion 1, and the side of the flange portion 2 facing the second end of the body portion 1 has a bearing surface that abuts against a plate 21; the outer wall of the first end of the body portion 1 has a groove 6 that is recessed radially inward; the interior of the body portion 1 has a threaded hole 7 that extends from the interior of the body portion 1 to the second end of the body portion 1, and the threaded hole 7 has a guide surface 8 that forms a 60° guide angle with the plane of the second end of the body portion 1; the outer wall of the second end of the body portion 1 is provided with a guide portion 3, a material receiving portion 4 and a material discharging portion 5 in sequence along its axial direction, the material discharging portion 5 being adjacent to the flange portion 2 and located on the bearing surface side of the flange portion 2, the material discharging portion 5 forming a material discharging step with the bearing surface;

[0045] Plate 21, the plate 21 has a narrow edge distance structure, the plate 21 is provided with mounting holes 22 that are riveted to the fasteners, and part of the material in the mounting holes 22 is deformed by extrusion and flows through the guide part 3 into the material receiving part 4 and the discharge part 5 to the material receiving groove.

[0046] The plastic part 31 is wrapped around the outer wall of the plate 21 along the axial direction and the outer wall of the fastener, and the plastic part 31 also fills the gap between the fastener and the plate 21. Part of the material of the plastic part 31 flows into the groove 6 after being extruded and deformed.

[0047] With the above structure, the plate 21 in this embodiment is a narrow-edge bent plate. In other embodiments, the plate 21 can be a narrow-edge plate with positional restrictions, or the opposite side of the narrow edge is also the bending point. In this embodiment, the plate 21 and the fastener 100 can be quickly riveted together by the matching cutting edge positioning mold. Under the extrusion action, part of the material of the plate 21 at the mounting hole 22 deforms and flows through the guide part 3 into the material groove between the material receiving part 4 and the material discharging part 5. The plate 21 abuts against the bearing surface of the flange part 2. The knurled tooth structure of the material discharging part 5 can be squeezed into the material of the plate 21 during the connection with the plate 21. In addition, part of the material of the plastic part 31 flows into the groove 6 after being deformed by extrusion. The groove 6 can provide anti-pull-out capability after the plastic part 31 is injected. The form and number of the groove 6 can be adjusted according to the actual situation and can be set as trapezoidal, circular, rectangular, etc. The press-fit injection molding fastening structure provided in this embodiment has a very wide range of applications.

[0048] Specifically, in this embodiment, the plate 21 is made of copper. The plate 21 is a soft metal plate 21, which utilizes the good ductility of the soft metal plate 21 to guide the flow of some of the material in the plate 21, thereby reducing the stress on the edge of the mounting hole 22 of the plate 21.

[0049] Although different specific embodiments are mentioned in this application, this application is not limited to the situations described in industry standards or embodiments. Slightly modified implementations based on certain industry standards or custom methods or embodiments can also achieve the same, equivalent, or similar, or predictable, implementation effects as the above embodiments. Embodiments applying these modified or modified data acquisition, processing, output, and judgment methods still fall within the scope of optional implementations of this application.

[0050] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A fastener, characterized in that, include: The main body has a first end and a second end along its axial direction; A flange portion is provided on the outer wall of the main body portion along the axial direction of the main body portion, and a bearing surface that abuts against the plate is provided on the side of the flange portion facing the second end of the main body portion; The outer wall of the first end of the main body is provided with a groove that is recessed inward along its radial direction; The main body has a threaded hole inside, which extends from the inside of the main body to the second end of the main body. The threaded hole has a guide surface that forms a 60° guide angle with the plane of the second end of the main body. The outer wall of the second end of the main body is provided with a guide part, a material receiving part and a material discharging part in sequence along its axial direction. The material discharging part is adjacent to the flange part and is located on the bearing surface side of the flange part. The material discharging part and the bearing surface form a material discharging step.

2. The fastener according to claim 1, characterized in that, The outer diameter of the guide portion is smaller than the outer diameter of the discharge portion, and the diameter of the receiving portion gradually increases from the discharge portion to the guide portion. A receiving trough is formed between the receiving portion and the discharge portion to receive the material flowing on the plate due to deformation.

3. The fastener according to claim 1 or 2, characterized in that, The outer wall of the discharge section is provided with knurled teeth.

4. The fastener according to claim 1, characterized in that, The threaded hole is either a blind hole or a through hole.

5. A press-fit injection molding fastening structure, characterized in that, include: A fastener comprising a body portion and a flange portion, the body portion having a first end and a second end along its axial direction; the flange portion being disposed on the outer wall of the body portion along the axial direction of the body portion, the flange portion having a bearing surface abutting against a plate on the side facing the second end of the body portion, the outer wall of the first end of the body portion having a groove recessed radially inward; the body portion having a threaded hole extending from the interior of the body portion to the second end of the body portion, the threaded hole having a guide surface forming a 60° guide angle with the plane of the second end of the body portion; the outer wall of the second end of the body portion having a guide portion, a receiving portion and a discharging portion sequentially arranged along its axial direction, the discharging portion being adjacent to the flange portion and located on the bearing surface side of the flange portion, the discharging portion and the bearing surface forming a discharging step; The plate has a narrow edge spacing structure and is provided with mounting holes for riveting with the fasteners. Part of the material in the mounting holes is deformed by extrusion and flows through the guide part to the material receiving part and the material discharging part forming the material receiving groove. A plastic part is wrapped around the outer wall of the sheet metal along the axial direction and the outer wall of the fastener, and the plastic part also fills the gap between the fastener and the sheet metal. A portion of the material of the plastic part flows into the groove after being extruded and deformed.

6. The press-fit injection molding fastening structure according to claim 5, characterized in that, The plate is made of copper.

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