Self-locking pressing rivet piece and connecting system

Abstract

The utility model provides a self-locking pressing rivet piece and a connecting system, the self-locking pressing rivet piece is used for being riveted with a plate, and the self-locking pressing rivet piece comprises a main body part and a pressing part, the first extension part is formed by extending the main body part outwards in the radial direction along the outer edge of the middle part in the axial direction; the second extension part is formed by outwards extending the outer edge of one end of the main body part along the axial direction along the radial direction, a preset distance is formed between the second extension part and the first extension part, so that a containing groove is formed, and the containing groove is used for containing a deformation part after the plate is subjected to plastic deformation; the end face, facing the first extension part, of the second extension part is a first groove side wall of the containing groove, and the end, facing the first extension part, of the second extension part gradually inclines outwards. The outer diameter of the main body part is smaller than the aperture of the prefabricated hole of the plate, and the outer diameter of the first extension part is larger than the aperture of the prefabricated hole of the plate and smaller than the outer diameter of the second extension part. The self-locking pressure riveting piece can effectively meet the connection requirements of ultrathin and superhard plates, and has a continuous connection effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and particularly relates to a self-locking riveting part and a connection system. Background Technique

[0002] Press riveting is a riveting method that uses the static pressure generated by a press riveting machine to upset the rivet rod to form a upset head. The riveted parts by press riveting have the characteristics of good surface quality, small deformation, high connection strength, etc., so they are widely used in various mechanical structure fields, such as shipbuilding, automobile manufacturing, aerospace, household appliances, etc. In recent years, with the rapid development of the household consumer electronics product market, the demand for press riveting of ultra-thin plates in electronic products has also been increasing. However, due to the limitations of their own structure and manufacturing process, traditional press riveting fasteners or fasteners are difficult to meet the press riveting connection requirements for ultra-thin (thickness of 0.15mm - 0.4mm) or ultra-hard (hardness below HV400) metal plates: for example, for ultra-thin plates, there are few riveting parts, and it is easy to have connection failure under the influence of the outside world after riveting; while for ultra-hard plates, due to their high hardness, the material is not easy to flow under pressure during the riveting process, so after the riveting action is completed, its riveting effect with the riveted part is not stable either. Content of the Utility Model

[0003] In view of the problems existing in the above-mentioned prior art, the main purpose of the utility model is to provide a self-locking riveting part and a connection system, and the provided self-locking riveting part can effectively meet the connection requirements of ultra-thin and ultra-hard plates and maintain the connection effect continuously.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a self-locking riveting part for riveting with a plate, including:

[0006] A main body part;

[0007] A first extension part, which is extended radially outward from the outer edge of the middle part of the main body part along the axial direction;

[0008] A second extension part, which is extended radially outward from the outer edge of one end of the main body part along the axial direction, and there is a preset distance between it and the first extension part to jointly form a receiving groove for receiving the deformed part after the plate undergoes plastic deformation; the end face of the second extension part facing the first extension part is the first groove side wall of the receiving groove, and the first groove side wall gradually inclines outward from the end of the second extension part facing the first extension part;

[0009] The outer diameter of the main body part is smaller than the aperture of the prefabricated hole of the plate, and the outer diameter of the first extension part is larger than the aperture of the prefabricated hole of the plate and smaller than the outer diameter of the second extension part.

[0010] As a further description of the above technical solution, the angle between the first groove side wall and the radial cross section of the main body is 5°-20°.

[0011] As a further description of the above technical solution, the end surface of the first extension portion facing the second extension portion is the second groove side wall of the receiving groove, and the second groove side wall gradually tilts outward from the first extension portion toward one end of the second extension portion.

[0012] As a further description of the above technical solution, the ratio of the outer diameter of the first extension portion to the aperture of the prefabricated hole is not greater than 1.08.

[0013] As a further description of the above technical solution, after the self-locking rivet is riveted to the plate, the end surface of the second extension portion facing away from the second extension portion is flush with the end surface of the plate facing away from the second extension portion.

[0014] As a further description of the above technical solution, the outer edge of the radial cross-section of the second extension portion is tooth-shaped or multi-deformed.

[0015] As a further description of the above technical solution, the self-locking rivet is provided with an inner hole, and the inner hole passes through the main body, the first extension part and the second extension part along the axial direction of the main body.

[0016] As a further description of the above technical solution, an internal thread is formed on the hole wall of the inner hole.

[0017] As a further description of the above technical solution, a connecting portion is formed on the outer wall of the main body portion located on the side of the first extending portion away from the second extending portion in the axial direction.

[0018] The present invention also provides a connection system, including a plate and the self-locking rivet as described above, wherein the plate is riveted to the self-locking rivet, and the deformed portion of the plate after plastic deformation is accommodated between the first extension portion and the second extension portion included in the self-locking rivet.

[0019] By means of the above technical solutions, the outstanding effects of the present invention are:

[0020] The self-locking riveting part provided by the utility model includes a main body part, a first extension part extending radially outward from the outer edge of the middle part of the main body part along the axial direction, and a second extension part extending radially outward from the outer edge of one end of the main body part along the axial direction. The two extension parts have a preset distance along the axial direction to form a deformation part for accommodating the plastic deformation of the plate. Since the end face of the second extension part facing the first extension part is the first groove side wall of the accommodation groove, and the first groove side wall gradually slopes outward from the end of the second extension part facing the first extension part, it can play a guiding role in the flowing part of the plate, making the flowing material part of the plate easier to deform and flow into the accommodation groove. Eventually, the volume of the material flowing into the accommodation groove in the plate is also relatively increased. After uncertainty evaluation, the volume of the plate flowing into the accommodation groove to form the deformation part is at least relatively increased by 7%. Therefore, whether the plate is an ultra-thin plate (a plate with a thickness of 0.15 mm - 0.4 mm) or a super-hard plate (a plate with a hardness of HV400 or below), compared with the design where the end face of the second extension part facing the other end of the main body part is not inclined, the connection part between it and the self-locking riveting part is more closely fitted. At the same time, after uncertainty evaluation, compared with the conventional self-locking riveting part without the first extension part (i.e., without the accommodation groove), the connection strength between it and the plate is increased by at least 20%. Therefore, the self-locking riveting part in this embodiment can more effectively meet the connection requirements of ultra-thin and super-hard plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of the self-locking riveting part in an embodiment of the utility model;

[0022] Figure 2 is an axial sectional view of the self-locking riveting part in an embodiment of the utility model;

[0023] Figure 3 is an assembly schematic view of the self-locking riveting part and the plate forming a connection system in an embodiment of the utility model;

[0024] Figure 4 is an axial sectional view of the self-locking riveting part and the plate forming a connection system in an embodiment of the utility model.

[0025] Explanation of the reference numerals in the drawings:

[0026] 1, plate; 2, main body part; 3, first extension part; 4, second extension part; 5, accommodation groove; 6, deformation part; 7, first groove side wall; 8, second groove side wall; 9, inner hole; 10, internal thread; 11, connection part; 12, installation mold; 13, avoidance hole; 14, guiding hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation manners according to the overall structure of the present utility model.

[0029] Please refer to Figures 1 to 4 , the present utility model discloses a self-locking riveting part and a connection system. The self-locking riveting part is used for riveting with a plate 1 and includes:

[0030] A main body part 2;

[0031] A first extension part 3, which is formed by radially extending outward from the outer edge of the middle part of the main body part 2 along the axial direction;

[0032] A second extension part 4, which is formed by radially extending outward from the outer edge of one end of the main body part 2 along the axial direction. There is a preset distance between it and the first extension part 3, and they jointly form a receiving groove 5 for receiving the deformed part 6 of the plate 1 after plastic deformation. The end face of the second extension part 4 facing the first extension part 3 is the first groove side wall 7 of the receiving groove 5, and the first groove side wall 7 gradually inclines outward from the end of the second extension part 4 facing the first extension part 3;

[0033] The outer diameter of the main body part 2 is smaller than the aperture of the prefabricated hole of the plate 1, and the outer diameter of the first extension part 3 is larger than the aperture of the prefabricated hole of the plate 1 and smaller than the outer diameter of the second extension part 4.

[0034] With the above structure, during the process of riveting the self-locking rivet with the plate 1, the end of the main body 2 of the self-locking rivet away from the second extension 4 can be first placed into the prefabricated hole of the plate 1, and then pressure is applied from the end of the second extension 4 away from the first extension 3, so that the first extension 3 is first stressed and axially extruded into the prefabricated hole of the plate 1. Continue to maintain the pressure application action on the second extension 4, so that the second extension 4 will also externally squeeze the surrounding part of the prefabricated hole of the plate 1, causing the part of the plate 1 to be stressed and flow into the groove 5 jointly formed by the second extension 4 and the first extension 3. At the same time, the outer circumference of the second extension 4 will also be embedded into the plate 1. During this process, since the end face of the second extension 4 facing the first extension 3 is the first groove side wall 7 of the groove 5, and the first groove side wall 7 gradually slopes outward from the end of the second extension 4 facing the first extension 3, it can play a guiding role in the flowing part of the plate 1, making the material part of the plate 1 that flows more easily deform and flow into the groove 5. Finally, the volume of the deformed part 6 of the plate 1 after plastic deformation due to stress flow and accommodated in the groove 5 also relatively increases. After uncertainty evaluation, the volume of the plate 1 flowing into the groove 5 to form the deformed part 6 increases by at least 7% relatively. Therefore, whether the plate 1 is an ultra-thin plate 1 (a plate 1 with a thickness of 0.15 mm - 0.4 mm) or a super-hard plate 1 (a plate 1 with a hardness of HV400 or less), compared with the design where the end face of the second extension 4 facing the other end of the main body 2 is not inclined, its connection part 11 with the self-locking rivet is more closely fitted; at the same time, after uncertainty evaluation, compared with a conventional self-locking rivet without the first extension 3 (i.e., without the groove 5), its connection strength with the plate 1 increases by at least 20%. Therefore, the self-locking rivet in this embodiment can more effectively meet the connection requirements of ultra-thin and super-hard plates 1.

[0035] Please refer to Figures 2 to 4 , specifically, in this embodiment, the included angle between the first groove side wall 7 and the radial cross-section of the main body 2 is set to 10° to guide the material part of the plate 1 under pressure to flow, making it easier to deform and flow into the groove 5. Of course, in other embodiments, the included angle between the first groove side wall 7 and the radial cross-section of the main body 2 can also be set to other values between 5° and 20°.

[0036] Specifically, in this embodiment, the end surface of the first extension portion 3 facing the second extension portion 4 serves as the second groove sidewall 8 of the receiving groove 5. The second groove sidewall 8 gradually slopes outward from the first extension portion 3 toward one end of the second extension portion 4. This configuration increases the overall volume of the receiving groove 5 to accommodate the deforming portion 6 of the sheet material 1 during deformation and flow. Of course, in other embodiments, the end surface of the first extension portion 3 facing the second extension portion 4 still serves as the second groove sidewall 8 of the receiving groove 5, but it can be designed to be parallel to the radial cross-section of the main body 2.

[0037] Specifically, in this embodiment, although the outer diameter of the first extension portion 3 is larger than the aperture of the prefabricated hole of the plate 1, the ratio of the outer diameter of the first extension portion 3 to the aperture of the prefabricated hole is not greater than 1.08, thereby ensuring that the deformed portion 6 of the plate 1 that undergoes plastic deformation due to force flow can be completely placed in the receiving groove 5, and no excess material will overflow from the receiving groove 5.

[0038] Specifically, in this embodiment, after the self-locking rivet is riveted to the plate 1 , the end surface of the second extension portion 4 facing away from the second extension portion 4 is flush with the end surface of the plate 1 facing away from the second extension portion 4 .

[0039] See also Figure 1 Specifically, in this embodiment, the outer edge of the radial cross-section of the second extension portion 4 is tooth-shaped to tightly fit with the plate 1 to ensure the effectiveness of the connection. Of course, in other embodiments, the outer edge of the radial cross-section of the second extension portion 4 can also be a variety of shapes, such as hexagonal, octagonal, etc.

[0040] Please continue reading Figures 1 to 4 Specifically, in this embodiment, the self-locking rivet is provided with an inner hole 9, which passes through the main body 2, the first extension part 3 and the second extension part 4 along the axial direction of the main body 2, and an internal thread is formed on the hole wall of the inner hole 9, so that after the plate 1 is combined with the self-locking rivet, it can be connected with other components by screwing.

[0041] Specifically, in this embodiment, a connecting portion 11 is formed on the outer wall of the main body 2 on the side of the first extension portion 3 facing away from the second extension portion 4 in the axial direction, so as to connect other components. The connecting portion 11 can be, for example, an external thread, a rivet groove, etc.

[0042] Specifically, the connection system disclosed in the present invention includes a plate 1 and the self-locking rivet as described above, the plate 1 is riveted to the self-locking rivet, and the deformed portion 6 of the plate 1 after plastic deformation is accommodated between the first extension portion 3 and the second extension portion 4 included in the self-locking rivet. The structure of the self-locking rivet is the same as above and will not be repeated here. Figure 3 and Figure 4 As shown, during the process of connecting the plate 1 with the self-locking rivet, the plate 1 with the prefabricated hole can be placed on the installation mold 12, so that the main body 2 of the self-locking rivet is inserted from top to bottom into the prefabricated hole of the plate 1 away from one end of the second extension part 4, and pressure can be applied from the end face of the second extension part 4 away from the first extension part 3, so that the first extension part 3 is first subjected to force and axially squeezed into the prefabricated hole of the plate 1, and the pressure-applying action on the second extension part 4 is continued, so that the second extension part 4 will also be squeezed by external force to the part around the prefabricated hole of the plate 1, so that the plate 1 in this part is subjected to force and guided by the extension part toward the inclined end face of the first extension part 3, and flows into the groove 5 formed by the second extension part 4 and the first extension part 3, and at the same time, the circumferential outer edge of the second extension part 4 will also be embedded in the plate 1. The mounting mold 12 is provided with an avoidance hole 13 and a guide hole 14 coaxially connected to the lower side of the avoidance hole 13. The guide hole 14 is used to guide the main body 2, and the avoidance hole 13 is used to circumferentially avoid the first extension part 3. In addition, the upper end diameter of the avoidance hole 13 is in the form of gradually shrinking from top to bottom. While supporting the material of the plate 1 that is deformed by the flow of force, it also cooperates with the guiding effect of the inclined end face of the extension part toward the first extension part 3, so that the material of the plate 1 that is deformed by the flow of force can more easily enter the containing groove 5.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any changes, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-locking rivet for riveting a plate, characterized in that: include: Main body; a first extension portion, the first extension portion being formed by radially outwardly extending from an outer edge of a middle portion of the main body portion along the axial direction; a second extension portion, formed by radially outwardly extending from an outer edge of one axial end of the main body portion, the second extension portion and the first extension portion having a preset distance therebetween to form a receiving groove, the receiving groove being used to accommodate the deformed portion of the plate after plastic deformation; an end surface of the second extension portion facing the first extension portion being a first groove sidewall of the receiving groove, the first groove sidewall gradually inclining outwardly from the second extension portion toward one end of the first extension portion; The outer diameter of the main body is smaller than the diameter of the prefabricated hole of the plate, and the outer diameter of the first extension portion is larger than the diameter of the prefabricated hole of the plate and smaller than the outer diameter of the second extension portion.

2. The self-locking rivet according to claim 1, characterized in that: An included angle between the first groove side wall and the radial cross section of the main body is 5°-20°.

3. The self-locking rivet according to claim 1, characterized in that: An end surface of the first extension portion facing the second extension portion is a second groove sidewall of the receiving groove, and the second groove sidewall gradually slopes outward from the first extension portion toward one end of the second extension portion.

4. The self-locking rivet according to claim 1, characterized in that: The ratio of the outer diameter of the first extension portion to the diameter of the prefabricated hole is not greater than 1.

08.

5. The self-locking self-clinching rivet according to claim 1, characterized in that: When the self-locking rivet is riveted to the plate, the end surface of the second extension portion facing away from the second extension portion is flush with the end surface of the plate facing away from the second extension portion.

6. The self-locking self-clinching rivet according to claim 1, characterized in that: The outer edge of the radial cross section of the second extension portion is tooth-shaped or multi-deformed.

7. The self-locking self-clinching rivet according to claim 1, characterized in that: The self-locking rivet is provided with an inner hole, and the inner hole passes through the main body, the first extension part and the second extension part along the axial direction of the main body.

8. The self-locking self-clinching rivet according to claim 7, characterized in that: An internal thread is formed on the hole wall of the inner hole.

9. The self-locking self-clinching rivet according to claim 1, characterized in that: A connecting portion is formed on the outer wall of the main body portion located on a side of the first extending portion away from the second extending portion in the axial direction.

10. A connection system, characterized in that: It comprises a plate and the self-locking rivet according to any one of claims 1 to 9, wherein the plate is riveted to the self-locking rivet, and the deformed portion of the plate after plastic deformation is accommodated between the first extension portion and the second extension portion included in the self-locking rivet.

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