Nut assembly and fastening device

Abstract

The utility model relates to the technical field of fastening, in particular to a nut assembly, which comprises a nut, an elastic part, a screwing hole, an outer cover and a sealing element, one end of the elastic part is fixed at one end of the nut, the screwing hole extends to the nut from the other end of the elastic part, the outer cover is sleeved on the nut, one surface of the sealing element is arranged on the outer cover, and the sealing element surrounds the nut. The other surface of the sealing piece is used for being adhered to a piece to be installed. When the nut assembly is installed on the to-be-installed piece, the elastic part corresponds to the through hole of the to-be-installed piece, the elastic part can guide the elastic part of the nut to be inserted into the through hole of the to-be-installed piece, and the nut is driven to move relative to the bolt in the screwing direction till the nut abuts against the to-be-installed piece. The outer cover and the sealing piece can prevent water from entering the screwing hole and the through hole of the to-be-installed piece, the rusting risk of the nut and the bolt is reduced, and the screwing failure risk of the bolt and the nut is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fastening, in particular to a nut assembly and a fastening device. Background Art

[0002] Riveting is one of the fastening connection methods, and its function is to fixedly connect one component relative to another component. In the prior art, a riveting assembly includes a bolt and a nut. The nut is provided with a threaded hole. The nut abuts against the orifice of the through hole of the to-be-installed part. After the bolt passes through the through hole of the to-be-installed part, it is screwed into the threaded hole. As the bolt continuously rotates relative to the threaded hole along the locking direction, the nut moves towards the bolt direction, and the bolt deforms in the radial direction, so that the nut abuts against the orifice of the through hole.

[0003] However, in the process of implementing the present utility model, the inventor found that when the deformed part generated by the deformation of the nut abuts against the to-be-installed part, there is a tiny gap between the deformed part and the to-be-installed part, so that water can enter the through hole of the to-be-installed part and the threaded hole of the nut, resulting in rust of the to-be-installed part and the nut, and even the screw connection failure of the bolt and the nut. Summary of the Utility Model

[0004] The present utility model provides a nut assembly with good waterproof performance, which reduces the risk of rust and prolongs the service life of the nut assembly.

[0005] To solve the above technical problems, one technical solution adopted by the present utility model is: to provide a nut assembly, including a nut; an elastic part, one end of the elastic part is fixed to one end of the nut; a threaded hole, the threaded hole extends from the other end of the elastic part to the nut, wherein the elastic part is used for being inserted into the through hole of the to-be-installed part to install the nut on the to-be-installed part; an outer cover for sleeving on the nut; a sealing member, one surface of the sealing member is arranged on the outer cover and the sealing member surrounds the nut, and the other surface of the sealing member is used for adhering to the to-be-installed part.

[0006] Optionally, the outer cover includes a cover body and an abutting part. The cover body is provided with a receiving groove. The abutting part is arranged at one end of the cover body located at the orifice of the receiving groove, and the abutting part surrounds one end of the cover body located at the orifice of the receiving groove; the cover body is used for sleeving the nut, the nut is received in the receiving groove, and one surface of the sealing member adheres to the abutting part.

[0007] Optionally, the depth of the receiving groove is greater than or equal to the length of the nut, and the length of the nut is the length in the direction from one end of the elastic part to the other end of the elastic part.

[0008] Optionally, in the direction of the outer cover towards the seal, a groove is provided on the end face of the cover body; the seal is arranged in the groove, and part of the seal protrudes from the groove.

[0009] Optionally, a first clamping groove is formed by recessing the seal; the groove has a first side wall, and a first clamping portion protrudes from the first side wall. When the seal is inserted into the groove, the first clamping portion extends into the first clamping groove to limit the separation of the seal from the nut.

[0010] Optionally, a second clamping groove is formed by recessing the seal; the groove has a second side wall, the first side wall and the second side wall are oppositely arranged, and a second clamping portion protrudes from the second side wall. When the seal is inserted into the groove, the second clamping portion extends into the second clamping groove to limit the separation of the seal from the nut.

[0011] Optionally, the seal includes an adhesive and a smooth layer. One end of the adhesive adheres to the outer cover, and the smooth layer is attached to the other end of the adhesive. The smooth layer is used for the user to tear it off so that the other end of the adhesive is exposed.

[0012] Optionally, a step is provided on the end face of one end of the nut, and the step is used to carry the component to be installed.

[0013] Optionally, a deformation groove is recessed on the surface of the outer cover towards the nut, and the deformation groove is used to provide a deformation space for the nut.

[0014] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a fastening assembly, including a bolt and the above-mentioned nut assembly. The elastic portion of the nut of the nut assembly is used to be inserted into the through hole of the component to be installed to install the nut on the component to be installed, and the bolt passes through the through hole and is screwed into the screw hole of the nut of the nut assembly.

[0015] The beneficial effects of the embodiments of the present application are as follows: A nut assembly is provided, which includes a nut, an elastic part, a threaded hole, an outer cover, and a seal. One end of the elastic part is fixed to one end of the nut, the threaded hole extends from the other end of the elastic part to the nut, the outer cover is sleeved on the nut, one surface of the seal is disposed on the outer cover, and the seal surrounds the nut. The other surface of the seal is used to adhere to the piece to be installed. When the nut assembly is installed on the piece to be installed, the elastic part corresponds to the through hole of the piece to be installed. The elastic part can guide the elastic part of the nut to be inserted into the through hole of the piece to be installed. After a bolt passes through the through hole of the piece to be installed, it is threadedly connected to the nut to install the nut on the piece to be installed. As the nut moves relative to the bolt in the tightening direction until the nut abuts against the piece to be installed, when the nut is further driven to move relative to the bolt in the tightening direction, the nut deforms to form a deformed part. The deformed part abuts against the piece to be installed, and the deformed part has an elastic force, which can keep the nut always abutting against the piece to be installed, increasing the stability of the nut relative to the piece to be installed. In addition, both the outer cover and the seal can prevent water from entering the threaded hole, reducing the risk of rusting of the nut and the bolt, and reducing the risk of failure of the threaded connection between the bolt and the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the drawings.

[0017] Figure 1 is a sectional view of a riveting assembly of the prior art provided by the present utility model;

[0018] Figure 2 is a view of a nut assembly provided by the present utility model;

[0019] Figure 3 is a sectional view of a fastening device provided by the present utility model;

[0020] Figure 4 is a sectional view of a nut provided by the present utility model.

[0021] REFERENCE NUMERALS:

[0022] 1000, fastening device; 200, bolt; 300, riveting assembly; a200, bolt; a100, nut; a10a, threaded hole; 400, piece to be installed; 400a, through hole; 100, nut assembly; 11, nut; 12, elastic part; 10a, threaded hole; 20, outer cover; 21, housing; 22, abutting part; 30, seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] For the convenience of understanding the present utility model, the present utility model will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0025] In the prior art, please refer to Figure 1 , the riveting assembly 1000 includes bolts a100 and nuts a200. The bolt a200 passes through the through hole 300a of the to-be-installed part 400 and is screwed to the nut a100 to realize the common clamping of the bolt a200 and the nut a100 on the to-be-installed part 400.

[0026] The to-be-installed part 400 includes a first installation part and a second installation part. The first installation part is provided with a first hole, and the second installation part is provided with a second hole. When the first installation part is connected to the second installation part, the first hole and the second hole correspond to each other to form a through hole 300a. The bolt a200 passes through the first hole of the first installation part and the second hole of the second installation part in sequence and is then screwed to the nut a100. The bolt a200 and the nut a100 jointly clamp the first installation part and the second installation part to realize the connection and fixation of the first installation part relative to the second installation part, or the connection and fixation of the second installation part relative to the first installation part. The to-be-installed part 400 is of great significance in the splicing between coil sheet metals, the riveting between the fuselage of an aircraft and other components, the riveting between the automobile body and chassis components, and the connection of the hull structure. Exemplarily, when riveting between the fuselage of an aircraft and other components, the fuselage of the aircraft can withstand high-intensity loads, including static loads, dynamic loads, and impact loads. In addition, the strength and reliability of the riveting points. In addition, in the case of long-term high-frequency vibration and alternating loads of the aircraft, the riveting technology can also provide good fatigue performance to ensure that no fatigue cracks will occur within the service life.

[0027] The above-mentioned nut a100 is provided with a screwing hole a10a. The nut a100 abuts against the orifice end face of the through hole 300a of the workpiece 400 to be installed. The bolt a200 passes through the through hole 300a of the workpiece 400 to be installed and is screwed into the screwing hole a10a. As the bolt a200 continuously rotates relative to the nut a100 in the tightening direction, the bolt a200 pulls the nut a100 to move in the direction of the bolt a200 until the nut a100 abuts against the workpiece 400 to be installed. Although the bolt a200 and the nut a100 can also clamp the workpiece 400 to be installed, however, as the workpiece 400 to be installed continuously vibrates and is impacted by the load, the nut a100 is likely to rotate relative to the bolt a200, and the common clamping of the bolt a200 and the nut a100 on the workpiece 400 to be installed fails.

[0028] Furthermore, as an external force is continuously applied to drive the bolt a200 to rotate relative to the nut a100 in the tightening direction, the nut a100 has a tendency to move in the direction of the bolt a200. When the bolt a200 continuously rotates relative to the screwing hole a10a in the tightening direction and the applied external force overcomes the tensile strength of the nut a100, the bolt a200 deforms in the radial direction to form a deformed portion, and the deformed portion of the nut a100 abuts against the orifice of the through hole 300a. Since when the above riveting is realized, the deformed portion has elastic potential energy, that is, it has an elastic force for pressing the workpiece 400 to be installed, so as to reduce the risk of the nut a100 detaching from the bolt a200, thereby increasing the anti-vibration performance of the workpiece 400 to be installed.

[0029] As the riveting assembly 1000 is applied to various industries, for example: the hull structure is in contact with water for a long time and the aircraft flies in bad weather, water and other tiny particles are likely to enter the screwing hole a10a and the through hole 300a of the workpiece 400 to be installed through the gap between the deformed portion and the workpiece 400 to be installed, causing the workpiece 400 to be installed and the nut a100 to rust. The threads of the screwing hole a10a and the bolt a200 are thinner relative to the nut a100, and the area exposed to air and water is larger. Moreover, the connection between the nut a100 and the bolt a200 is achieved by the mutual meshing of the threads of the screwing hole a10a and the bolt a200. The threads of the bolt a200 are more likely to rust relative to the bolt a200, and the threads of the screwing hole a10a are more likely to rust relative to the nut a100. It is concluded that the screwing connection between the bolt a200 and the nut a100 is likely to fail.

[0030] The present utility model provides a nut assembly 100. Please refer to Figures 2 - 3, the nut assembly 100 includes a nut 11, an outer cover 20, and a seal 30. The outer cover 20 is sleeved on the nut 11, and one end of the seal 30 is disposed on the outer cover 20. When the nut assembly 100 is installed on a workpiece to be installed 400, the seal 30 is located between the nut 11 and the workpiece to be installed 400. The bolt 200 passes through the through hole 400a of the workpiece to be installed 400 and is then screwed to the nut 11. As the bolt 200 continuously rotates relative to the nut 11 in the tightening direction, the nut 11 moves relative to the bolt 200 until the nut 11 abuts against the workpiece to be installed 400, and the seal 30 adheres to the outer cover 20 and the workpiece to be installed 400 respectively, so that water or foreign objects are blocked by the outer cover 20 and the seal 30, further reducing the risk of water entering the through hole 400a and the threaded hole 10a of the workpiece to be installed 400, thereby solving the technical problem that the bolt 200 and the nut 11 are prone to rust, and further reducing the risk of screw connection failure between the bolt 200 and the nut 11, and prolonging the service life of the nut assembly 100.

[0031] The above-mentioned nut assembly 100 further includes an elastic part 12 and a threaded hole 10a. One end of the elastic part 12 is fixed to one end of the nut 11, the threaded hole 10a extends from the other end of the elastic part 12 to the nut 11, one surface of the seal 30 is disposed on the outer cover 20, and the seal 30 surrounds the nut 11, and the other surface of the seal 30 is used for adhering to the workpiece to be installed 400. When the nut assembly 100 is installed on the workpiece to be installed 400, the elastic part 12 is inserted into the through hole 400a of the workpiece to be installed 400 to install the nut 11 on the workpiece to be installed 400. The elastic part 12 also plays a positioning role. By guiding the nut 11 to be inserted into the through hole 400a of the workpiece to be installed 400 through the elastic part 12, the nut 11 and the workpiece to be installed 400 can be quickly aligned.

[0032] A step 10b is provided on the end face of one end of the above-mentioned nut 11, and the step 10b can bear the workpiece to be installed 400.

[0033] In some embodiments, the surface of the outer cover 20 facing the nut 11 is recessed with a deformation groove, and the deformation groove is close to one end of the workpiece to be installed 400. The deformation groove can provide a deformation space for the nut 11. Along the depth direction of the threaded hole 10a, the cross-sectional shape of the deformation groove is a semicircle or an ellipse. The deformation groove in the shape of a semicircle or an ellipse can provide guidance for the deformation of the nut 11, and guide the deformed part of the nut 11 to extend into the deformation groove.

[0034] In some embodiments, the inner side of the nut 11 is recessed towards the outer side to form a raised portion, and along the direction of the nut 11 from the screw hole 10a, the distance from the inner side of the nut 11 to the outer cover 20 remains the same all the time, that is, it is equidistantly arranged. When an external force is applied to drive the nut 11 to move in the direction of tightening along the bolt 200, and until the nut 11 abuts against the component to be installed 400 and then continues to drive the nut 11 to move in the direction of tightening along the bolt 200, the raised portion can be quickly deformed to form a deformed portion, so that the deformation of the nut 11 has consistency and stability.

[0035] Along the direction from one end of the elastic portion 12 to the other end of the elastic portion 12, the outer diameter of the cross-section of the elastic portion 12 becomes larger and larger, so that the elastic portion 12 forms a hook-shaped structure, and the hook-shaped structure abuts against the side wall of the component to be installed 400, reducing the risk of the nut 11 detaching from the component to be installed 400.

[0036] The above-mentioned outer cover 20 includes a cover body 21 and an abutting portion 22. The cover body 21 is provided with a receiving groove 21a, and the abutting portion 22 is arranged at one end of the cover body 21 located at the notch of the receiving groove 21a, and the abutting portion 22 surrounds one end of the cover body 21 located at the notch of the receiving groove 21a. The cover body 21 sleeved on the nut 11, and the nut 11 is received in the receiving groove 21a. One surface of the seal 30 adheres to the abutting portion 22. Optionally, the shape of the above-mentioned receiving groove 21a is adapted to the shape of the nut 11. For example: the shape of the receiving groove 21a is cylindrical or square. In addition, the depth of the receiving groove 21a is greater than the length of the nut 11, and the length of the nut 11 is the length along the direction from one end of the elastic portion 12 to the other end of the elastic portion 12, so that there is a gap between the receiving groove 21a and the nut 11, preventing interference problems from occurring when the outer cover 20 is sleeved on the nut 11 due to errors during the processing, and increasing the adaptability of the nut 11 or the outer cover 20. Optionally, the depth of the receiving groove 21a is equal to the length of the nut 11, and there is a seamless connection between the receiving groove 21a and the nut 11, so that the nut assembly 100 can be applied in scenarios with narrow space and high-precision equipment.

[0037] In some embodiments, towards the direction of the seal 30, the end face of the cover body 21 is provided with a groove, and the groove has a first side wall and a second side wall arranged oppositely. The seal 30 is arranged in the groove, and the first side wall and the second side wall respectively play a role in limiting the seal 30, preventing the seal 30 from shifting relative to the nut 11, and a part of the seal 30 protrudes from the groove, and the part protruding from the groove is used for adhering to the component to be installed 400.

[0038] In some embodiments, a first clamping portion protrudes from the first side wall, and a second clamping portion protrudes from the second side wall, that is, the first clamping portion and the second clamping portion are arranged oppositely, and there is an opening between the first clamping portion and the second clamping portion. When the seal 30 is installed on the nut 11, the seal 30 is squeezed into the groove through the opening.

[0039] In some embodiments, the surface of the seal 30 opposite to the first side wall is recessed to form a first card slot, and the surface opposite to the second side wall is recessed to form a second card slot. When the seal 30 is inserted into the groove, the first card portion extends into the first card slot, and the second card portion extends into the second card slot to limit the separation of the seal 30 from the nut 11.

[0040] The above-mentioned seal 30 includes an adhesive and a smooth layer. One end of the adhesive adheres to the outer cover 20, and the smooth layer adheres to the other end of the adhesive. When the nut assembly 100 is installed on the workpiece to be installed 400, after the user tears off the smooth layer, the other end of the adhesive is exposed, and the other end of the adhesive is adhered to the workpiece to be installed 400.

[0041] In an embodiment of the present application, a nut assembly 100 is provided. The nut assembly 100 includes a nut 11, an outer cover 20, and a seal 30. The nut 11 includes a nut 11, an elastic portion 12, and a threaded hole 10a. One end of the elastic portion 12 is fixed to one end of the nut 11, and the threaded hole 10a extends from the other end of the elastic portion 12 to the nut 11. The outer cover 20 is sleeved on the nut 11. One surface of the seal 30 is disposed on the outer cover 20, and the seal 30 surrounds the nut 11. The other surface of the seal 30 is used to adhere to the workpiece to be installed 400. When the nut assembly 100 is installed on the workpiece to be installed 400, the elastic portion 12 corresponds to the through hole 400a of the workpiece to be installed 400. The elastic portion 12 of the nut 11 can guide the elastic portion 12 to be inserted into the through hole 400a of the workpiece to be installed 400. After the bolt 200 passes through the through hole 400a of the workpiece to be installed 400, it is screwed to the nut 11 to install the nut 11 on the workpiece to be installed 400. As the nut 11 moves relative to the bolt 200 in the tightening direction until the nut 11 abuts against the workpiece to be installed 400, when the nut 11 is further driven to move relative to the bolt 200 in the tightening direction, the nut 11 deforms to form a deformed portion. The deformed portion abuts against the workpiece to be installed 400, and the deformed portion has an elastic force to keep the nut 11 always abutting against the workpiece to be installed 400, increasing the stability of the nut 11 relative to the workpiece to be installed 400. In addition, the outer cover 20 and the seal 30 can prevent water from entering the threaded hole 10a and the through hole of the workpiece to be installed, reducing the risk of rust of the nut 11 and the bolt 200, and reducing the risk of screw connection failure between the bolt 200 and the nut 11.

[0042] The present utility model also provides an embodiment of a fastening device 1000. The fastening device 1000 includes a bolt 200 and the above-mentioned fastening assembly. The elastic portion 12 of the nut of the nut assembly 100 is inserted into the through hole 400a of the workpiece to be installed 400 to install the nut on the workpiece to be installed 400. The bolt 200 passes through the through hole 400a and is screwed to the threaded hole 10a of the nut of the nut assembly 100. For the specific structure and function of the fastening assembly, reference can be made to the above embodiments, and details will not be described herein one by one.

[0043] It should be noted that the description and drawings of the present utility model provide preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as falling within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made based on the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A nut assembly, characterized in that: include: Nuts; an elastic portion, one end of which is fixed to one end of the nut; a screw connection hole extending from the other end of the elastic portion to the nut, wherein the elastic portion is used to be inserted into a through hole of a to-be-mounted component so as to mount the nut on the to-be-mounted component; An outer cover, used for sleeved on the nut; A sealing member, one surface of which is arranged on the outer cover and surrounds the nut, and the other surface of which is used to adhere to the part to be installed.

2. The nut assembly according to claim 1, characterized in that: The outer cover comprises a cover body and an abutment portion, the cover body is provided with a receiving groove, the abutment portion is provided at one end of the cover body located at the notch of the receiving groove, and the abutment portion surrounds one end of the cover body located at the notch of the receiving groove; The cover body is used for sleeve-mounting the nut, the nut is received in the receiving groove, and a surface of the sealing element is adhered to the abutting portion.

3. The nut assembly according to claim 2, characterized in that: The depth of the receiving groove is greater than or equal to the length of the nut, and the length of the nut is the length along the direction from one end of the elastic part to the other end of the elastic part.

4. The nut assembly according to claim 2, characterized in that: The outer cover is facing the sealing element, and the end surface of the cover body is provided with a groove; The sealing member is disposed in the groove, and a portion of the sealing member protrudes from the groove.

5. The nut assembly according to claim 4, characterized in that: The sealing member is recessed to form a first groove; The groove has a first side wall, and a first clamping portion protrudes from the first side wall. The first clamping portion is used to extend into the first clamping groove when the sealing member is inserted into the groove, so as to limit the sealing member from being disengaged from the nut.

6. The nut assembly according to claim 5, characterized in that: The sealing member is recessed to form a second groove; The groove has a second side wall, the first side wall is arranged opposite to the second side wall, and the second side wall protrudes with a second clamping portion, which is used to extend into the second clamping groove when the seal is inserted into the groove to limit the seal from disengaging from the nut.

7. The nut assembly according to claim 1, characterized in that: The sealing member comprises an adhesive and a smooth layer, wherein one end of the adhesive is adhered to the outer cover, and the smooth layer is attached to the other end of the adhesive, and the smooth layer is used for being torn off by a user so that the other end of the adhesive is exposed.

8. The nut assembly according to claim 1, characterized in that: The end surface of one end of the nut is provided with a step, and the step is used to support the part to be installed.

9. The nut assembly according to any one of claims 1 to 6, characterized in that: A deformation groove is recessed on the surface of the outer cover facing the nut, and the deformation groove is used to provide a deformation space for the nut.

10. A fastening device, characterized in that: It comprises a bolt and a nut assembly as described in any one of claims 1 to 9, wherein the elastic portion of the nut of the nut assembly is used to be inserted into the through hole of the part to be installed so as to install the nut on the part to be installed, and the bolt passes through the through hole and is screwed to the screw hole of the nut of the nut assembly.

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