Stable type pressing rivet nut

Abstract

The utility model discloses a stable type pressing rivet nut which comprises a nut body and a reinforcing column, the nut body is of a step-shaped boss structure which is integrally formed, the nut body comprises a nut head, a positioning ring, a riveting portion and a nut column which are sequentially connected in the axial direction, and the outer diameter of the nut head is larger than that of the positioning ring. The outer diameter of the riveting part and the outer diameter of the nut column are both smaller than the outer diameter of the positioning ring, a plurality of embedded ribs are arranged on the side, close to the nut column, of the nut head and extend in the radial direction of the nut column, and a plurality of clamping insections parallel to the axial direction are arranged on the positioning ring. A threaded part is arranged on the inner wall of the reinforcing column, the height of the nut column is larger than or equal to that of the reinforcing column, the reinforcing column is connected into the nut column in a clamped mode, and the reinforcing column is used for pulling the nut column to horizontally move in the axial direction so that the riveting part can be riveted. According to the utility model, the extrusion force generated in the riveting process can be effectively controlled to act on the riveting part, the acting force of each area in the riveting process can be effectively balanced, and the riveting effect is good.

Description

Technical Field

[0001] The utility model relates to the field of hardware riveting components, in particular to a stable riveting nut. Background Art

[0002] A riveting nut, also known as a rivet nut and a self-locking nut, is a fastener specifically used for connecting thin plates or sheet metals. In the existing mechanical connection technology, as a commonly used fastener, the riveting nut is widely used in the assembly processes of industries such as automobiles, electronics, and aerospace to achieve firm connection between different material laminates.

[0003] Conventional riveting nuts usually have knurled teeth and guide grooves at one end. After the knurled teeth are pressed into the preset position of the laminate, the periphery at one end of the hole deforms to achieve riveting and locking. In the face of complex stress environments or high-load conditions, there are often problems such as insufficient riveting and locking strength, easy loosening or fracture, and unnecessary deformation or even fracture of the laminate structure due to unbalanced riveting force. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a stable riveting nut with high riveting and locking strength, strong stability, and balanced force on the riveted structure.

[0005] A stable riveting nut according to an embodiment of the utility model includes a nut body and a reinforcing column. The nut body is an integrally formed stepped boss structure. The nut body includes a nut head, a positioning ring, a riveting portion, and a nut column connected in sequence along the axial direction. The outer diameter of the nut head is greater than that of the positioning ring, and the outer diameters of the riveting portion and the nut column are both smaller than that of the positioning ring. The nut head, the positioning ring, the riveting portion, the nut column, and the reinforcing column are all circular cylindrical bodies. The riveting portion is used to cooperate with the nut head and the positioning ring to clamp different laminates respectively. A plurality of embedding ribs are provided on one side of the nut head close to the nut column, and the embedding ribs extend radially along the nut column. A plurality of axially parallel clamping tooth patterns are provided on the circumferential surface of the positioning ring;

[0006] The inner wall of the reinforcing column is provided with a threaded portion. The height of the nut column is greater than or equal to the height of the reinforcing column. The reinforcing column is clamped and connected inside the nut column, and the reinforcing column is used to pull the nut column to translate axially to enable the riveting portion to be riveted.

[0007] In this embodiment, the nut body is a metal nut structure, and the reinforcing column is a rubber column structure.

[0008] In this embodiment, an annular clamping groove is provided on the inner wall of the nut column, and an annular clamping protrusion is provided on the outer wall of the reinforcing column. The clamping protrusion is clamped and connected in the clamping groove.

[0009] In this embodiment, a plurality of guiding grooves adjacent to each embedding rib are further provided on one side of the nut head close to the nut column.

[0010] In this embodiment, the side of the embedding rib close to the nut column is a narrowed blade shape, and a conical tooth is further provided on the side of the nut head close to the nut column. The height of the conical tooth is greater than the thickness of the embedding rib.

[0011] In this embodiment, at least one end of each embedding rib is provided with a conical tooth.

[0012] In this embodiment, the riveting part is provided with a plurality of reinforcing ribs extending axially, and the reinforcing ribs are arranged on the outer side surface of the riveting part.

[0013] In this embodiment, the distance D between every two adjacent reinforcing ribs is equal, the width of the reinforcing rib is d, and D > d.

[0014] In this embodiment, the inner diameter of the nut head is matched and equal to the inner diameter of the reinforcing column.

[0015] The embodiments of the present utility model at least have the following beneficial effects:

[0016] By introducing a special reinforcing column structure into the nut body, and the reinforcing column is in a snap-fit connection with the nut column, the driving force formed during the press riveting installation can be transmitted through the reinforcing column, and the height of the reinforcing column is within the height of the nut column. The reinforcing column can effectively reinforce this area for the nut column, so as to effectively control the extrusion force generated during the press riveting process to act on the riveting part, and can significantly reduce the probability of deformation of other structures except the riveting part. It can effectively improve the reliability of the riveting action, with high riveting strength. The setting of the reinforcing column can ensure a good structural stability of the press riveting nut while enabling a thinner and lighter design of the riveting part, and can effectively ensure the riveting deformation ability of the riveting part; in addition, by setting the nut body as a stepped boss structure, a more comprehensive positioning effect can be achieved on the multi-layer board structure to be riveted, and the acting forces in each area during the riveting process can be effectively balanced, with good riveting effect and high stability of the laminated structure of the riveting target; by setting the clamping tooth pattern in cooperation with the embedding rib, the clamping tooth pattern can achieve pre-positioning between the nut body and the laminated board. During the continuous riveting and extrusion process of installation, the embedding rib can effectively embed into the surface of the laminated board, with strong stability of the riveting installation action, and at the same time can effectively improve the firmness of the overall structure after riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0018] Figure 1 is a three-dimensional structural schematic diagram of the stable press riveting nut according to the embodiment of the present utility model;

[0019] Figure 2 Schematic diagram of the three-dimensional structure of the stable riveting nut according to an embodiment of the present utility model from another perspective;

[0020] Figure 3 Schematic diagram of the internal structure of the stable riveting nut according to an embodiment of the present utility model;

[0021] Figure 4 Exploded structure schematic diagram of the stable riveting nut according to an embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of the structure of the stable riveting nut according to an embodiment of the present utility model before riveting;

[0023] Figure 6 Schematic diagram of the structure of the stable riveting nut according to an embodiment of the present utility model after riveting.

[0024] Reference numerals:

[0025] Nut body 100, nut head 110, embedded rib 111, guiding groove 112, conical teeth 113, positioning ring 120, engaging tooth pattern 121, riveting portion 130, reinforcing rib 131, nut column 140, engaging groove 141;

[0026] Reinforcing column 200, threaded portion 210, engaging convex strip 220. Detailed implementation manners

[0027] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, if the terms first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0030] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0031] The press-in nut, also known as a rivet nut or self-clinching nut, is a fastener specifically used for connecting thin plates or sheet metals. In the existing mechanical connection technology, as a commonly used fastener, the press-in nut is widely used in the assembly processes of industries such as automotive, electronics, and aerospace to achieve firm connections between different material laminates. Traditional press-in nuts usually have knurled teeth and guide grooves at one end. After the knurled teeth are pressed into the preset position of the laminate, the periphery at one end of the hole is deformed by twisting to achieve riveting and locking. In the face of complex stress environments or high-load conditions, there are often problems such as insufficient riveting and locking strength, easy loosening or fracture, and due to unbalanced riveting forces, it is easy to cause unnecessary deformation or even fracture of the laminate structure. Especially in multi-layer laminate structures, its clamping force and stability are difficult to meet the strict requirements for connection reliability in the high-end manufacturing field.

[0032] Specifically, the design of traditional press-in nuts often focuses on a single riveting function and lacks effective reinforcement measures for multi-layer laminate structures, resulting in fatigue failure of the connection interface between the nut and the laminate during long-term use or extreme working conditions, affecting the stability and safety of the overall structure. In addition, although some designs attempt to improve the strength by increasing the nut thickness or changing the material, they often sacrifice the installation convenience and cost-effectiveness, which is not conducive to large-scale applications.

[0033] The following refers to the attached Figure 1 to the attached Figure 6 to describe the stable press-in nut of the embodiment of the present utility model, which has high riveting and locking strength, strong stability, and the structure obtained by riveting is under balanced stress.

[0034] Refer to Figures 1 to 6, A stable riveting nut according to an embodiment of the present utility model includes a nut body 100 and a reinforcing column 200. The nut body 100 is a stepped boss structure formed integrally, that is, the nut body 100 is an integrally formed structure and the outer contour of the nut body 100 is a stepped boss. The nut body 100 includes a nut head 110, a positioning ring 120, a riveting portion 130, and a nut column 140 connected in sequence along the axial direction. The nut head 110, the positioning ring 120, the riveting portion 130, the nut column 140, and the reinforcing column 200 are all circular columnar bodies. The outer diameter of the nut head 110 is greater than the outer diameter of the positioning ring 120. The outer diameters of the riveting portion 130 and the nut column 140 are both smaller than the outer diameter of the positioning ring 120, and the axis lines of the nut head 110, the positioning ring 120, and the nut column 140 are collinear and parallel to the axial direction. Preferably, the outer diameter of the nut column 140 is equal to the outer diameter of the riveting portion 130. The riveting portion 130 is used to cooperate with the nut head 110 and the positioning ring 120 to clamp different laminates respectively. For example, when there are two layers of laminates to be targeted, the riveting portion 130 cooperates with the positioning ring 120 to clamp one of the laminates, and at the same time, the riveting portion 130 also cooperates with the nut head 110 to clamp the two laminates. On the side of the nut head 110 close to the nut column 140, there are a number of embedded ribs 111. The embedded ribs 111 protrude from the surface of the nut head 110. Preferably, the embedded ribs 111 are evenly distributed. The embedded ribs 111 extend along the radial direction of the nut column 140. When the embedded ribs 111 are embedded in the target laminate in the radial direction, a firm positioning effect can be formed relative to the torsional force. The circumferential surface of the positioning ring 120 is provided with a number of axially parallel clamping teeth 121;

[0035] The inner wall of the reinforcing column 200 is provided with a threaded portion 210. The threaded portion 210 is used to cooperate with a screw for threaded connection to achieve the installation and riveting action under control. The height of the nut column 140 is greater than or equal to the height of the reinforcing column 200, that is, the reinforcing column 200 is surrounded by the nut column 140. The reinforcing column 200 is snap-connected inside the nut column 140. The edge of the reinforcing column 200 is aligned with the edge of the end of the nut column 140 away from the riveting portion 130, which can effectively prevent the reinforcing column 200 from striding into the area where the riveting portion 130 is located, and can effectively avoid the reinforcing column 200 from interfering with the riveting action of the riveting portion 130 while ensuring that the reinforcing column 200 improves the structural stability of the nut column 140, and can effectively ensure that the riveting action of the riveting portion 130 can proceed smoothly. The reinforcing column 200 is used to pull the nut column 140 to translate axially so that the riveting portion 130 is riveted and deformed.

[0036] In this stable riveting nut, the axial direction refers to the extending direction of the axis of the riveting nut, and the radial direction refers to the direction perpendicular to the axis of the riveting nut and passing through the axis. When a circular plane is drawn with the axis of the riveting screw as the center, the circular plane is perpendicular to the axis, and the radius direction or diameter direction of the circular plane is the radial direction.

[0037] Now, taking the press riveting target structure as a double-layer board structure, the first layer of board is pre-opened according to the outer diameter dimension of the positioning ring 120 to obtain a first through hole, and the second layer of board is pre-opened according to the outer diameter dimension of the nut post 140 to obtain a second through hole. The press riveting installation process of the stable press riveting nut of the present utility model is as follows: Refer to Figure 5 As shown, the press riveting nut is passed through the first through hole and the second through hole of the double-layer board structure. The nut head 110 abuts against one side of the first layer of board away from the second layer of board. The positioning ring 120 is inserted into the first through hole, and the positioning ring 120 abuts against one side of the second layer of board close to the first layer of board. The nut post 140 and the riveting portion 130 both pass through the second through hole. A rotary driving tool such as an electric screwdriver is used to sequentially pass the screw through the nut head 110, the positioning ring 120, and the riveting portion 130 to reach the reinforcing column 200. The screw is threadedly connected to the threaded portion 210 of the reinforcing column 200, pressing the nut head 110 against the surface of the first layer of board, so that the embedded rib 111 is slightly stuck into the surface of the first layer of board. The positioning tooth pattern 121 is in interference fit with the first through hole, and the protruding portion of the positioning tooth pattern 121 is in extrusion contact with the inner wall of the first through hole, which can effectively realize the positioning and fixing between the positioning ring 120 and the first layer of board. Under the driving action of the rotary driving tool, the screw rotates relative to the reinforcing column 200, and the position of the fixed screw in the axial direction is fixed. Then the reinforcing column 200 will move axially relative to the screw. The reinforcing column 200 moves axially closer to the first layer of board. At the same time, the reinforcing column 200 also pulls the nut post 140 closer to the first layer of board, that is, the nut post 140 moves closer to the positioning ring 120 and the nut head 110. The embedded rib 111 is continuously embedded into the surface of the first layer of board to improve the stability of the relative position between the nut head 110 and the first layer of board. By the mutual approach and extrusion between the nut post 140 and the positioning ring 120, the riveting portion 130 is flattened and deformed, thereby realizing the riveting of the riveting portion 130. The structure after riveting refers to Figure 6 As shown, thus the riveting portion 130 cooperates with the positioning ring 120 to clamp and position the second layer of board, and the riveting portion 130 cooperates with the nut head 110 to clamp and position the first layer of board and the second layer of board.

[0038] By introducing a special reinforcing column 200 structure into the nut body 100, and connecting the reinforcing column 200 with the nut column 140 in a clamping manner, the driving force formed during the press riveting installation can be transmitted through the reinforcing column 200, and the height of the reinforcing column 200 is within the height of the nut column 140. Through the reinforcing column 200, the structural reinforcement of this area can be effectively achieved for the nut column 140, so as to effectively control the extrusion force generated during the press riveting process to act on the riveting part 130, and can significantly reduce the probability of deformation of other structures in the nut body 100 except the riveting part 130. It can effectively improve the stability and reliability of the riveting action. The riveting strength of this riveting nut is high, and the setting of the reinforcing column 200 can ensure a more lightweight design of the riveting part 130 while making the press riveting nut have good structural stability, can effectively ensure the riveting deformation ability of the riveting part 130, and can also effectively save the input of the manufacturing materials of the nut body 100;

[0039] In addition, the positioning ring 120 can be used to cooperate with the riveting part 130 after riveting to clamp the single-layer board during installation, which can effectively maintain the structural stability of the single-layer board. When used for the riveting of vehicles such as automobiles, the single-layer board can be the structure of the vehicle body, and the other layer board is an additional other structure. Through the abutting and positioning of the positioning ring 120, the structural stability of the single-layer board can be effectively improved. By setting the nut body 100 as a stepped boss structure, a more comprehensive positioning effect can be achieved for the multi-layer board structure to be riveted, the acting forces in each area during the riveting process can be effectively balanced, the phenomenon of uneven stress concentration caused by uneven clamping action can be reduced, and the riveting effect can be effectively improved;

[0040] By setting the clamping tooth pattern 121 to cooperate with the embedding rib 111, the clamping tooth pattern 121 can achieve pre-positioning between the nut body 100 and the layer board. During the continuous riveting and extrusion process of installation, the embedding rib 111 can be effectively embedded into the surface of the layer board, so as to effectively improve the structural stability between the nut head 110 and the layer board, effectively improve the stability of the riveting installation action, and at the same time effectively improve the firmness of the overall structure after riveting.

[0041] It can be understood that the nut body 100 is a metal nut structure, and the reinforcing column 200 is a rubber column structure. By setting the reinforcing column 200 to cooperate with the nut body to strengthen the structural stability of the press riveting nut and improve the targeted extrusion force on the riveting part 130 during riveting, the input cost of the materials of the nut body 100 can be effectively saved while ensuring the structural stability and riveting stability.

[0042] It is arranged in the nut post 140 by means of injection molding with a rubber material. The reinforcing post 200 made of rubber material can not only effectively ensure the function of the reinforcing structure. In addition, in the case of over-riveting extrusion caused by misoperation during the riveting installation process, the reinforcing post 200 can absorb part of the acting force, thereby effectively reducing the adverse effects brought by misoperation.

[0043] It can be understood that an annular clamping groove 141 is provided on the inner wall of the nut post 140, and an annular clamping rib 220 is provided on the outer wall of the reinforcing post 200. The clamping rib 220 is clamped and connected in the clamping groove 141. Through the arrangement of the clamping groove 141 and the clamping rib 220, the stability of the pulling action of the reinforcing post 200 on the nut post 140 can be realized.

[0044] Preferably, both the clamping rib 220 and the clamping groove 141 are provided with a plurality of them, and the number and position of both are matched and equal. By arranging multiple groups of the clamping rib 220 and the clamping groove 141, the stability of the connection structure between the reinforcing post 200 and the nut post 140 can be further improved, thereby effectively improving the stability of the riveting action.

[0045] It can be understood that several guiding grooves 112 adjacent to each embedding rib 111 are further provided on one side of the nut head 110 close to the nut post 140. The guiding grooves 112 are used to receive the deformed objects generated by the extrusion of the embedding rib 111 when embedding into the layer board, which can effectively improve the locking effect and at the same time effectively improve the compactness of the riveting connection structure.

[0046] It can be understood that one side of the embedding rib 111 close to the nut post 140 is a narrowed blade shape, and a conical tooth 113 for punching holes is further provided on one side of the nut head 110 close to the nut post 140. The height of the conical tooth 113 is greater than the thickness of the embedding rib 111, that is, the height of the conical top of the conical tooth 113 protruding from the surface of the nut head 110 is greater than the thickness of the embedding rib 111. When the embedding rib 111 contacts the first layer board, the conical tooth 113 is inserted into the surface of the first layer board in advance, which can play a role in guiding and positioning and pre-opening holes, and can provide a good positioning basis and embedding basis for the subsequent embedding action of the blade-shaped embedding rib 111.

[0047] It can be understood that at least one conical tooth 113 is provided at each end of each embedding rib 111. Preferably, a conical tooth 113 is provided at both opposite ends of each embedding rib 111, which can effectively improve the stability of the embedding and positioning action.

[0048] It can be understood that the riveting part 130 is provided with a plurality of reinforcing rib strips 131 extending axially. The reinforcing rib strips 131 are arranged on the outer side surface of the riveting part 130. By providing the reinforcing rib strips 131, the stability of the riveted structure formed after the riveting process of the riveting part 130 can be effectively improved. During the riveting process, the riveting part 130 will deform, usually by outward extrusion deformation. The reinforcing rib strips 131 can effectively prevent the riveting part 130 from breaking due to extrusion and stretching, and can effectively improve the stability of the structure after riveting.

[0049] It can be understood that the distance between every two adjacent reinforcing rib strips 131 is equal and set as D. By setting the positions of the reinforcing rib strips 131 at equal intervals, the uniformity of force can be effectively improved. The width of the reinforcing rib strip 131 is d, and D>d. By setting the distance between every two adjacent reinforcing rib strips 131 to be greater than the width of the reinforcing rib strip 131, it can effectively ensure that the riveting action of extrusion deformation can proceed smoothly.

[0050] It can be understood that the inner diameter size of the nut head 110 is matched and equal to the inner diameter size of the reinforcing column 200. During the riveting installation, the central hole part of the nut head 110 can guide and limit the screw, which can effectively facilitate the accurate insertion of the screw into the hole of the reinforcing column 200 and can effectively simplify the alignment operation.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stable riveting nut, characterized in that, It includes a nut body (100) and a reinforcing column (200). The nut body (100) is an integrally formed stepped boss structure. The nut body (100) includes a nut head (110), a positioning ring (120), a riveting part (130), and a nut column (140) that are connected in sequence along the axis. The nut head (110), the positioning ring (120), the riveting part (130), the nut column (140), and the reinforcing column (200) are all circular cylindrical bodies. The outer diameter of the nut head (110) is greater than the outer diameter of the positioning ring (120). The outer diameters of the riveting part (130) and the nut column (140) are both smaller than the outer diameter of the positioning ring (120). The riveting part (130) is used to cooperate with the nut head (110) and the positioning ring (120) to clamp different laminates respectively. On one side of the nut head (110) close to the nut column (140), there are a number of embedding ribs (111). The embedding ribs (111) extend radially along the nut column (140). On the circumferential surface of the positioning ring (120), there are a number of axially parallel clamping tooth patterns (121). The inner wall of the reinforcing column (200) is provided with a threaded part (210). The height of the nut column (140) is greater than or equal to the height of the reinforcing column (200). The reinforcing column (200) is clamped and connected inside the nut column (140). The reinforcing column (200) is used to pull the nut column (140) to translate axially so that the riveting part (130) is riveted.

2. The stable riveting nut according to claim 1, characterized in that, The nut body (100) is a metal nut structure, and the reinforcing column (200) is a rubber column structure.

3. The stable blind rivet nut according to claim 1, characterized in that, The inner wall of the nut column (140) is provided with an annular clamping groove (141). The outer wall of the reinforcing column (200) is provided with an annular clamping rib (220). The clamping rib (220) is clamped and connected in the clamping groove (141).

4. The stable clinch nut according to claim 1, characterized in that, On one side of the nut head (110) close to the nut column (140), there are also a number of guiding grooves (112) adjacent to each embedding rib (111).

5. The stable riveting nut according to claim 4, wherein, The side of the embedding rib (111) close to the nut column (140) is a narrowed blade shape. On one side of the nut head (110) close to the nut column (140), there are also cone teeth (113). The height of the cone teeth (113) is greater than the thickness of the embedding rib (111).

6. The stable riveting nut according to claim 5, characterized in that, At least one end of each embedding rib (111) is provided with one of the cone teeth (113).

7. The stable riveting nut according to claim 1, wherein, The riveting part (130) is provided with a number of axially extending reinforcing ribs (131). The reinforcing ribs (131) are arranged on the outer side surface of the riveting part (130).

8. A stable riveting nut according to claim 7, characterized in that, The distance D between every two adjacent reinforcing ribs (131) is equal. The width of the reinforcing rib (131) is d, and D > d.

9. The stable type riveting nut according to claim 1, characterized in that The inner diameter of the nut head (110) is matched and equal to the inner diameter of the reinforcing column (200).

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