Nut structure and combined workpiece

Abstract

The utility model provides a nut structure and a combined workpiece, and relates to the technical field of vehicles, the nut structure comprises a nut body provided with a threaded hole, a flange part provided with a first through hole and a tension part provided with a second through hole, the nut body, the flange part and the tension part are sequentially connected along the axial direction of the threaded hole, the threaded hole, the first through hole and the second through hole are sequentially communicated and coaxially arranged, the tension part is used for being in abutting fit with the hole wall of a mounting hole of a plate workpiece through expansion deformation, and a limiting structure is arranged at the outer edge of the flange part; the limiting structure is used for abutting against the side face, facing the flange part, of the plate workpiece so as to limit rotation of the nut structure relative to the plate workpiece. Therefore, the nut structure can be pressed and riveted on a plate workpiece of a flat-plate-shaped or profile structure, and the nut structure can be prevented from rotating when being fixedly connected with a bolt.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, and more specifically, to a nut structure and its assembly. Background Technology

[0002] Currently, aluminum profiles are increasingly used in the tubular beam structures of vehicle bodies, especially in structures such as anti-collision beams, seat crossbeams, and sill beams. In locations requiring significant load-bearing capacity, such as battery box and seat mounting positions, rivet nuts are often used due to limited installation space, as the nuts need to be located inside the profile cavity. However, the mechanical properties of rivet nuts are insufficient for the requirements, while press-fit nuts, although meeting the requirements, cannot be installed within the profile cavity. Utility Model Content

[0003] The problem solved by this utility model is: how to press and rivet nuts inside the cavity of a profile.

[0004] To solve the above problems, this utility model provides a nut structure and an assembly workpiece.

[0005] In a first aspect, this utility model provides a nut structure, including a nut body with a threaded hole, a flange portion with a first through hole, and a tension portion with a second through hole. The nut body, the flange portion, and the tension portion are sequentially connected along the axial direction of the threaded hole. The threaded hole, the first through hole, and the second through hole are sequentially connected and coaxially arranged. The tension portion is used to abut against the wall of the mounting hole of the plate workpiece by expanding and deforming. A limiting structure is provided at the outer edge of the flange portion. The limiting structure is used to abut against the side of the plate workpiece facing the flange portion to restrict the rotation of the nut structure relative to the plate workpiece.

[0006] Optionally, the limiting structure is a limiting tooth arranged radially along the flange portion, and the cross-section of the limiting tooth is triangular.

[0007] Optionally, in the radial direction of the flange, the protrusion height of the limiting tooth is set to decrease gradually from the end of the limiting tooth away from the stretching portion to the end of the limiting tooth near the stretching portion.

[0008] Optionally, a plurality of limiting teeth are provided, and the plurality of limiting teeth are evenly arranged along the circumference of the flange portion.

[0009] Optionally, the first through hole includes a cylindrical segment and a conical segment that are interconnected and coaxially arranged. The conical segment is located on the side of the cylindrical segment away from the second through hole, and the diameter of the conical segment increases progressively from the end of the conical segment toward the cylindrical segment to the end of the conical segment away from the cylindrical segment.

[0010] Optionally, the outer wall of the stretching portion is provided with a groove, which extends axially along the second through hole and extends from one end of the stretching portion to the other end.

[0011] Optionally, multiple grooves are provided, and the multiple grooves are evenly arranged along the circumference of the stretching portion.

[0012] Secondly, this utility model provides a combined workpiece, including a sheet metal workpiece and a nut structure as described above. The sheet metal workpiece is provided with a mounting hole, and the tensioning part of the nut structure is inserted into the mounting hole and used to abut against the wall of the mounting hole through expansion deformation. The flange part of the nut structure abuts against the side of the sheet metal workpiece facing the flange part.

[0013] Optionally, the sheet metal workpiece is a profile structure with a cavity, and the nut structure is disposed in the cavity.

[0014] Optionally, the end of the stretching portion away from the limiting portion is flush with the side of the sheet metal workpiece away from the flange portion.

[0015] The beneficial effects of the nut structure and assembled workpiece of this utility model are as follows: By setting a nut body, a flange, and a tensioning part, and providing coaxially connected threaded holes, a first through hole, and a second through hole on the nut body, flange, and tensioning part respectively, in use, the tensioning part of the nut structure can be inserted into the mounting hole of the sheet metal workpiece first. Then, an auxiliary tool such as a wrench can be used to fix the nut body of the nut structure to prevent the nut structure from rotating. Finally, the threaded part of the tensioning tool (i.e., a bolt with a threaded part and a conical head) is passed through the nut structure in sequence. After the second and first through holes are screwed into the threaded hole, the tensioning part expands and deforms under the extrusion of the conical head of the tensioning fixture, thereby making the tensioning part tightly abut against the wall of the mounting hole to fix the nut structure at the mounting hole of the sheet metal workpiece. This not only allows the nut structure to be riveted onto the sheet metal workpiece with a flat or profile structure, facilitating the connection between the sheet metal workpiece and other structures, but also ensures that the metal coating on the surface of the sheet metal workpiece is not damaged. Thus, the nut structure can be pre-embedded on sheet metal workpieces of different metal materials while ensuring corrosion resistance. Moreover, by setting a limiting structure at the edge of the flange, the limiting structure abuts against the side of the sheet metal workpiece facing the flange to limit the nut structure from rotating when it is tightened with bolts, ensuring a reliable and firm connection between the sheet metal workpiece and other structures. At the same time, setting the limiting structure at the outer edge of the flange can improve the convenience of processing the limiting structure, thereby improving production efficiency. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the nut structure in an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the nut structure in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the nut structure and the plate workpiece during assembly in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the nut structure and the plate workpiece during assembly, from another perspective, in an embodiment of this utility model.

[0020] Figure 5 This is a cross-sectional view of the nut structure and the plate workpiece during assembly in the first embodiment of this utility model;

[0021] Figure 6 This is a cross-sectional view of the nut structure and the plate workpiece during assembly in the second embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Nut structure; 11. Nut body; 112. Threaded hole; 12. Flange; 121. First through hole; 1211. Cylindrical section; 1212. Conical section; 122. Limiting structure; 13. Tensioning part; 131. Second through hole; 132. Groove; 20. Plate workpiece; 21. Mounting hole; 22. Cavity. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0026] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the nut structure 10 provided in this embodiment of the present invention includes a nut body 11 with a threaded hole 112, a flange portion 12 with a first through hole 121, and a tension portion 13 with a second through hole 131. The nut body 11, the flange portion 12, and the tension portion 13 are connected sequentially along the axial direction of the threaded hole 112. The threaded hole 112, the first through hole 121, and the second through hole 131 are sequentially connected and coaxially arranged. The tension portion 13 is used to abut against the wall of the mounting hole 21 of the plate workpiece 20 through expansion deformation. A limiting structure 122 is provided at the outer edge of the flange portion 12. The limiting structure 122 is used to abut against the side of the plate workpiece 20 facing the flange portion 12 to limit the rotation of the nut structure 10 relative to the plate workpiece 20.

[0028] Specifically, the nut body 11 of the nut structure 10 is the part that bears the internal thread. The flange 12 is used to abut against the plate workpiece 20 outside the mounting hole 21 to increase the force-bearing area and improve the limiting effect between the nut structure 10 and the plate workpiece 20. The tensioning part 13 is used to abut against the wall of the mounting hole 21 of the plate workpiece 20 through expansion deformation or tension deformation, so as to fix the nut structure 10 to the mounting hole 21 of the plate workpiece 20 in a non-welding manner. This makes the nut structure 10 in this embodiment applicable to both flat plate workpieces 20 and profile plate workpieces 20. Moreover, the flange 12 is provided with a limiting structure 122, which abuts against the side of the plate workpiece 20 facing the flange 12 to limit it, so as to prevent the nut structure 10 from rotating relative to the plate workpiece 20 when the plate workpiece 20 with the nut structure 10 is connected to other structures by bolts.

[0029] More specifically, the nut body 11, flange 12, and tensioning part 13 can be cylindrical or prismatic. When the tensioning part 13 is prismatic, since the mounting hole 21 of the sheet metal workpiece 20 is usually adapted to the tensioning part 13, the mounting hole 21 of the sheet metal workpiece 20 is also a prismatic through-hole structure. In practical applications, such as... Figure 1 As shown, the nut body 11 is typically preferably prismatic, while the flange 12 and the tensioning part 13 are cylindrical. The nut body 11 has a threaded hole 112 extending along its central axis, the flange 12 has a first through hole 121 extending along its central axis, and the tensioning part 13 has a second through hole 131 extending along its central axis. The threaded hole 112, the first through hole 121, and the second through hole 131 are sequentially connected and coaxially arranged. The first through hole 121 can be either a smooth hole or a threaded hole. The second through hole 131 is typically a circular smooth hole, and its diameter is usually greater than or equal to that of the first through hole 121. The diameter of the first through hole 121 is usually greater than or equal to the major diameter of the threaded hole 112, facilitating the rapid passage of the bolt through the second through hole 131 and the first through hole 121 to form a threaded connection with the threaded hole 112.

[0030] In this embodiment, the nut structure 10 can be configured by providing a nut body 11, a flange portion 12, and a tensioning portion 13. A coaxially connected threaded hole 112, a first through hole 121, and a second through hole 131 are respectively provided on the nut body 11, flange portion 12, and tensioning portion 13. Thus, in use, the tensioning portion 13 of the nut structure 10 can be first inserted into the mounting hole 21 of the sheet metal workpiece 20. Then, an auxiliary tool such as a wrench is used to fix the nut body 11 of the nut structure 10 to prevent rotation. The threaded portion of the tensioning tool (i.e., a bolt with a threaded portion and a conical head) is then sequentially passed through the second through hole 131 of the nut structure 10. After the through hole 131 and the first through hole 121 are screwed into the threaded hole 112, the tensioning part 13 expands and deforms under the extrusion of the conical head of the tensioning fixture, thereby making the tensioning part 13 tightly abut against the wall of the mounting hole 21 to fix the nut structure 10 at the mounting hole 21 of the plate workpiece 20. This not only allows the nut structure 10 to be riveted onto the plate workpiece 20 with a flat or profile structure so that the plate workpiece 20 can be connected to other structures, but also ensures that the metal plating on the surface of the plate workpiece 20 is not damaged. Thus, the nut structure 10 can be pre-embedded on plate workpieces 20 of different metal materials while ensuring corrosion resistance. Furthermore, by using the upper limit structure 122 on the flange portion 12 to abut and limit the plate workpiece 20 towards the side of the flange portion 12, the nut structure 10 is prevented from rotating when it is fastened to the bolt, ensuring that the connection between the plate workpiece 20 and other structures is reliable and firm. At the same time, by setting the limit structure 122 at the outer edge of the flange portion 12, the convenience of processing the limit structure 122 can be improved, thereby improving production efficiency.

[0031] Optionally, combined Figure 1 As shown, the limiting structure 122 is a limiting tooth arranged radially along the flange portion 12, and the cross-section of the limiting tooth is triangular. The cross-section of the limiting tooth refers to the section of the limiting tooth in the radial direction perpendicular to the flange portion 12.

[0032] In this optional embodiment, by setting the limiting structure 122 as a limiting tooth with a triangular cross-section, the plate workpiece 20 and the limiting structure 122 are in line-to-surface contact. This increases the friction between the plate workpiece 20 and the flange portion 12, thereby better preventing the nut structure 10 from rotating relative to the plate workpiece 20, and further ensuring the reliability and firmness of the plate workpiece 20 when connected to other structures. Moreover, by setting the limiting tooth along the radial direction of the flange portion 12, it is ensured that there is no component of the friction in the radial direction of the flange portion 12, that is, the friction between the plate workpiece 20 and the flange portion 12 is located in the tangential direction of the flange portion 12, thereby better preventing the nut structure 10 from rotating relative to the plate workpiece 20.

[0033] Optionally, combined Figure 1 As shown, in the radial direction of the flange portion 12, the protrusion height of the limiting tooth decreases from the end of the limiting tooth away from the tension portion 13 to the end of the limiting tooth close to the tension portion 13.

[0034] In this optional embodiment, the cross-section of the limiting tooth is triangular, and the area of ​​the cross-section of the limiting tooth gradually decreases from the end away from the stretching part 13 to the end closer to the stretching part 13. This makes the end of the limiting tooth away from the stretching part 13 have a pointed angle. When the nut structure 10 is fixed to the sheet metal workpiece 20 by riveting, the pointed angle of the limiting tooth can partially embed into the sheet metal workpiece 20 for limiting, thereby further improving the limiting effect of the limiting tooth.

[0035] Optionally, combined Figure 1 As shown, multiple limiting teeth are provided, and these teeth are evenly arranged along the circumference of the flange portion 12. In this way, using multiple limiting teeth for limiting increases the frictional force between the plate workpiece 20 and the flange portion 12. Furthermore, the even arrangement of the multiple limiting teeth along the circumference of the flange portion 12 ensures that the frictional force between the plate workpiece 20 and the flange portion 12 is evenly distributed in the circumferential direction of the flange portion 12, guaranteeing the force balance of the nut structure 10.

[0036] Furthermore, the maximum protrusion height of the limiting tooth is between 0.2mm and 0.5mm. Thus, setting the maximum protrusion height of the limiting tooth to greater than or equal to 0.2mm ensures that the limiting tooth can fulfill its limiting function. Simultaneously, setting the maximum protrusion height of the limiting tooth to less than or equal to 0.5mm prevents the force-bearing area between the flange 12 and the plate workpiece 20 from decreasing due to excessive clearance.

[0037] Optionally, combined Figure 2 As shown, the first through hole 121 includes a cylindrical section 1211 and a conical section 1212 that are interconnected and coaxially arranged. The conical section 1212 is located on the side of the cylindrical section 1211 away from the second through hole 131, and the diameter of the conical section 1212 increases from the end of the conical section 1212 toward the cylindrical section 1211 to the end of the conical section 1212 away from the cylindrical section 1211.

[0038] In this optional embodiment, the first through hole 121 is composed of a conical hole and a cylindrical hole. This allows the conical section 1212 of the first through hole 121 to guide the bolt, facilitating more accurate insertion into the threaded hole 112 of the nut structure 10 for installation, thus improving installation efficiency. Furthermore, an internal thread can be provided on the inner wall of the cylindrical section 1211 of the first through hole 121, and the diameter of the cylindrical section 1211 can be set to be the same as the diameter of the threaded hole 112, making the cylindrical section 1211 also a threaded hole structure. This is equivalent to extending the threaded hole 112 from the nut body 11 to the flange portion 12, ensuring that both the nut body 11 and the flange portion 12 in the nut structure 10 form a threaded connection with the bolt, improving the robustness of the connection between the nut structure 10 and the bolt.

[0039] Optionally, combined Figure 1 As shown, the outer wall of the stretching part 13 is provided with a groove 132, which extends axially along the second through hole 131 and extends from one end of the stretching part 13 to the other end.

[0040] In this optional embodiment, the groove 132 can be arranged longitudinally, that is, extending along the axial direction of the second through hole 131, or it can be arranged obliquely relative to the axial direction of the second through hole 131, without specific limitation. In this way, by providing the groove 132 on the outer wall of the stretching part 13, the local thickness of the stretching part 13 is reduced, which facilitates the outward expansion of the stretching part 13. Moreover, after the stretching part 13 expands outward, it can increase the contact area between it and the wall of the mounting hole 21, thereby increasing the contact area between the stretching part 13 and the plate workpiece 20, making the connection between the nut structure 10 and the plate workpiece 20 more stable. At the same time, extending the groove 132 along the axial direction of the second through hole 131 can improve the convenience of processing the groove 132, thereby improving the production efficiency of the nut structure 10. In addition, extending the groove 132 from one end of the stretching part 13 to the other end can ensure that the thickness of the stretching part 13 is evenly distributed in the direction of the central axis of the stretching part 13, so that the stretching part 13 can better adapt to plate workpieces 20 with different thicknesses.

[0041] Optionally, combined Figure 1 As shown, multiple grooves 132 are provided, and the multiple grooves 132 are evenly arranged along the circumference of the stretching part 13. In this way, not only can the local thickness of the stretching part 13 be further reduced, but the thickness of the stretching part 13 is also evenly distributed, which facilitates the stretching part 13 to quickly complete the outward expansion. At the same time, it can also further increase the contact area between the stretching part 13 and the plate workpiece 20, making the connection between the nut structure 10 and the plate workpiece 20 more stable.

[0042] Combination Figure 3 and Figure 4As shown, the present invention provides a composite workpiece including a plate workpiece 20 and a nut structure 10 as described above. The plate workpiece 20 is provided with a mounting hole 21. The tensioning part 13 of the nut structure 10 is inserted into the mounting hole 21 and is used to abut against the hole wall of the mounting hole 21 through expansion deformation. The limiting structure 122 on the flange part 12 of the nut structure 10 abuts against the side of the plate workpiece 20 facing the flange part 12.

[0043] In this embodiment, the mounting hole 21 can be a cylindrical hole structure, a conical hole structure, or a combination of cylindrical and conical holes; no specific limitation is made here. During assembly, the tensioning part 13 of the nut structure 10 is usually inserted into the mounting hole 21 of the sheet metal workpiece 20 first, and then the tensioning fixture is used to fix the tensioning part 13 of the nut structure 10 at the mounting hole 21 of the sheet metal workpiece 20. In this way, not only can the nut structure 10 be riveted onto the flat or profile sheet metal workpiece 20 to facilitate the connection between the sheet metal workpiece 20 and other structures, but it also allows the nut structure 10 to be pre-embedded on sheet metal workpieces 20 made of different metal materials while ensuring the corrosion resistance of the sheet metal workpiece 20; moreover, when the nut structure 10 is snapped onto the sheet metal workpiece 20, the setting of the limiting structure 122 can prevent the nut structure 10 from rotating when it is fastened to the bolt, ensuring that the connection between the sheet metal workpiece 20 and other structures is reliable and firm.

[0044] Furthermore, the mounting hole 21 includes a cylindrical hole and a conical hole that are interconnected and coaxially arranged. The conical hole is located on the side of the cylindrical hole away from the flange portion 12, and the diameter of the conical hole increases progressively from the end of the conical hole near the cylindrical hole to the end of the conical hole away from the cylindrical hole. In other words, the mounting hole 21 is composed of a combination of a circular hole and a conical hole. In this way, the conical hole increases the contact area between the stretching portion 13 and the hole wall of the mounting hole 21 when the stretching portion 13 of the nut structure 10 expands outward, making the stretching portion 13 fit more tightly against the hole wall of the mounting hole 21 and the engagement more secure.

[0045] Optionally, combined Figure 6 As shown, the sheet metal workpiece 20 is a profile structure with a cavity 22, and the nut structure 10 is disposed within the cavity 22. When the nut structure 10 is applied to the profile structure, it can be placed into the cavity 22 of the profile structure using a jig, and then fixed to the profile structure using a tensioning fixture. This allows the nut structure 10 to be used not only with flat sheet metal workpieces 20 but also with sheet metal workpieces of profile structures, improving the versatility of the nut structure 10.

[0046] Optionally, combined Figure 5 and Figure 6As shown, the end of the stretching part 13 away from the flange part 12 is flush with the side of the sheet metal workpiece 20 away from the flange part 12.

[0047] In this optional embodiment, when the sheet metal workpiece 20 is a profile structure, the side of the sheet metal workpiece 20 away from the flange 12 refers to the outer side of the side plate with the mounting hole 21 in the profile structure, that is, the side plate located outside the cavity 22. Thus, by setting one end of the tensioning part 13 away from the flange 12 to be flush with the side of the sheet metal workpiece 20 away from the flange 12, the connection between the tensioning part 13 and the sheet metal workpiece 20 can achieve an effect roughly the same as welding, further improving the axial and torsional loads that the nut structure 10 can withstand.

[0048] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A nut structure, characterized in that, The nut body (11) includes a threaded hole (112), a flange (12) has a first through hole (121), and a tensioning part (13) has a second through hole (131). The nut body (11), the flange (12), and the tensioning part (13) are connected sequentially along the axial direction of the threaded hole (112). The threaded hole (112), the first through hole (121), and the second through hole (131) are connected sequentially and coaxially arranged. The tensioning part (13) is used to abut against the wall of the mounting hole (21) of the plate workpiece (20) by expanding and deforming. A limiting structure (122) is provided at the outer edge of the flange (12). The limiting structure (122) is used to abut against the side of the plate workpiece (20) facing the flange (12) to restrict the rotation of the nut structure relative to the plate workpiece (20).

2. The nut structure according to claim 1, characterized in that, The limiting structure (122) is a limiting tooth arranged radially along the flange portion (12), and the cross-section of the limiting tooth is triangular.

3. The nut structure according to claim 2, characterized in that, In the radial direction of the flange portion (12), the protrusion height of the limiting tooth is set to decrease from the end of the limiting tooth away from the stretch portion (13) to the end of the limiting tooth close to the stretch portion (13).

4. The nut structure according to claim 2, characterized in that, The limiting teeth are provided in multiple ways, and the multiple limiting teeth are evenly arranged along the circumference of the flange portion (12).

5. The nut structure according to claim 1, characterized in that, The first through hole (121) includes a cylindrical segment (1211) and a conical segment (1212) that are interconnected and coaxially arranged. The conical segment (1212) is located on the side of the cylindrical segment (1211) away from the second through hole (131), and the diameter of the conical segment (1212) increases from one end of the conical segment (1212) toward the cylindrical segment (1211) to the other end of the conical segment (1212) away from the cylindrical segment (1211).

6. The nut structure according to claim 1, characterized in that, The outer wall of the stretching part (13) is provided with a groove (132), which extends axially along the second through hole (131) and extends from one end of the stretching part (13) to the other end.

7. The nut structure according to claim 6, characterized in that, The groove (132) is provided in multiple ways, and the multiple grooves (132) are evenly arranged along the circumference of the stretching part (13).

8. A composite workpiece, characterized in that, The device includes a sheet metal workpiece (20) and a nut structure as described in any one of claims 1-7. The sheet metal workpiece (20) is provided with a mounting hole (21). The tensioning part (13) of the nut structure is inserted into the mounting hole (21) and is used to abut against the wall of the mounting hole (21) by expanding and deforming. The limiting structure (122) on the flange part (12) of the nut structure abuts against the side of the sheet metal workpiece (20) facing the flange part (12).

9. The combined workpiece according to claim 8, characterized in that, The plate workpiece (20) is a profile structure with a cavity (22), and the nut structure is disposed in the cavity (22).

10. The combined workpiece according to claim 8, characterized in that, The end of the stretching portion (13) away from the flange portion (12) is flush with the side of the plate workpiece (20) away from the flange portion (12).

Images