Nut assembly and fastening device

Abstract

The utility model relates to the technical field of fastening, in particular to a nut assembly and a fastening device, which comprise a nut, a mounting part, a screw hole and a sealing ring, one end of the mounting part is fixed at one end of the nut, the screw hole extends to the nut from the other end of the mounting part, the mounting part is used for being inserted into a through hole of a piece to be mounted, and the sealing ring is arranged on the mounting part. The nut is mounted on the to-be-mounted part; and the sealing ring is arranged on the end face of one end of the nut, and the sealing ring surrounds the mounting part. When the nut assembly is installed on the to-be-installed piece, the sealing ring is arranged between the end face of one end of the nut and the to-be-installed piece in a cushioned mode, so that a gap between the to-be-installed piece and the nut assembly is reduced, the risk that water enters a screw hole of the nut and a part of bolts in the screw hole is reduced, and the service life of the nut assembly is prolonged. And the risk of screw joint failure of the bolt and the nut assembly is further 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 a through hole of a 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 rotates continuously 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 end face of the orifice of the through hole, and the nut and the bolt jointly clamp the to-be-installed part.

[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 rusting of the to-be-installed part and the nut, and even the failure of the screw connection between the bolt and the nut. Summary of the Utility Model

[0004] The present utility model provides a fastening assembly, which has a good waterproof function, reduces the entry of water into the fastening assembly, and improves the service life of the fastening assembly.

[0005] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a nut assembly, the nut assembly includes a nut; a mounting part, one end of the mounting part is fixed to one end of the nut, wherein the mounting part is used for being inserted into a through hole of a to-be-installed part to mount the nut on the to-be-installed part; a threaded hole, the threaded hole extends from the other end of the mounting part to the nut; a sealing ring, which is arranged on the end face of one end of the nut, and the sealing ring surrounds the mounting part, and the sealing ring is used for being pad between the end face of one end of the nut and the to-be-installed part when the nut is mounted on the to-be-installed part.

[0006] Optionally, a sealing groove is recessed on the end face of one end of the nut; the sealing ring is arranged in the sealing groove, and part of the sealing ring protrudes from the sealing groove, and the part of the sealing ring protruding from the sealing groove is used for abutting against the to-be-installed part when the nut is mounted on the to-be-installed part.

[0007] Optionally, a step is arranged on the end face of one end of the nut, and the step is used for bearing the to-be-installed part.

[0008] Optionally, the sealing groove is provided on the transverse wall of the step, and the part of the sealing ring protruding from the sealing groove is used to abut against the outer surface of the to-be-mounted part. Alternatively, the sealing groove is provided on the vertical wall of the step, and the part of the sealing ring protruding from the sealing groove is used to abut against the inner surface of the through hole of the to-be-mounted part.

[0009] Optionally, the sealing groove has a first side wall, and a first limiting portion protrudes from the first side wall. The first limiting portion is used to limit the sealing ring from disengaging from the sealing groove.

[0010] Optionally, the first limiting portion is provided with at least one notch, and the notch communicates with the sealing groove. The notch is used for a manual tool to extend into the sealing groove from the notch to take out the sealing ring.

[0011] Optionally, the first limiting portion is provided with a first guiding inclined surface, and the first guiding inclined surface is used to guide the sealing ring to be inserted into the sealing groove.

[0012] Optionally, the sealing groove has a second side wall, the first side wall and the second side wall are oppositely arranged, and the second side wall is provided with a second limiting portion. The second limiting portion is used to limit the sealing ring from disengaging from the sealing groove.

[0013] Optionally, along the direction from one end of the mounting portion to the other end of the mounting portion, the outer diameter of the cross-section of the mounting portion is getting larger and larger.

[0014] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a fastening device, including a bolt and the above-mentioned nut assembly. The mounting portion of the nut of the nut assembly is used to be inserted into the through hole of the to-be-mounted part to mount the nut on the to-be-mounted part, 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 effect of the embodiment of the present application is: to provide a nut assembly, including a nut, a mounting portion, a screw hole and a sealing ring. One end of the mounting portion is fixed to one end of the nut, and the screw hole extends from the other end of the mounting portion to the nut. Wherein, the mounting portion is used to be inserted into the through hole of the to-be-mounted part to mount the nut on the to-be-mounted part, the sealing ring is arranged on the end face of one end of the nut, and the sealing ring surrounds the mounting portion. When the nut assembly is mounted on the to-be-mounted part, the sealing ring is interposed between the end face of one end of the nut and the to-be-mounted part, so that the gap between the to-be-mounted part and the nut assembly is reduced, the risk of water entering the screw hole of the nut and part of the bolt in the screw hole is reduced, and further the risk of the screw connection between the bolt and the nut assembly failing is reduced. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use 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 based on 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 the nut assembly installed on a to-be-installed part provided by the present utility model;

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

[0021] Reference numerals:

[0022] 200, riveting assembly; a10, nut; a20, bolt; a10a, screw hole; 300, to-be-installed part; 300a, through hole;

[0023] 100, nut assembly; 20, sealing ring; 11, nut; 12, installation part; 10a, screw hole; 11a, sealing groove; 11b, step; 400, fastening device. Detailed implementation manners

[0024] To facilitate the understanding of the present utility model, the following will further describe the present utility model in more detail in conjunction with the 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.

[0025] 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.

[0026] In the prior art, please refer to Figure 1, the riveting assembly 200 includes a bolt a20 and a nut a10. The bolt a20 passes through the through hole 300a of the to-be-installed part 300 and is screwed to the nut a10 to clamp the to-be-installed part 300 jointly by the bolt a20 and the nut a10.

[0027] The to-be-installed part 300 includes a first installed part and a second installed part. The first installed part is provided with a first hole, and the second installed part is provided with a second hole. When the first installed part is connected to the second installed part, the first hole corresponds to the second hole to form a through hole 300a. The bolt a20 passes through the first hole of the first installed part and the second hole of the second installed part in sequence and is screwed to the nut a10. The bolt a20 and the nut a10 jointly clamp the first installed part and the second installed part to realize the connection and fixation of the first installed part relative to the second installed part, or the connection and fixation of the second installed part relative to the first installed part. The to-be-installed part 300 is of great significance for 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. Also, 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 appear within the service life.

[0028] The above-mentioned nut a10 is provided with a threaded hole a10a. The nut a10 abuts against the orifice end face of the through hole 300a of the to-be-installed part 300. The bolt a20 passes through the through hole 300a of the to-be-installed part 300 and is screwed to the threaded hole a10a. As the bolt a20 rotates continuously relative to the nut a10 along the locking direction, the bolt a20 pulls the nut a10 to move in the direction of the bolt a20 until the nut a10 abuts against the to-be-installed part 300. Although the bolt a20 and the nut a10 can also clamp the to-be-installed part 300, however, with the continuous vibration of the to-be-installed part 300 and the impact of the load, the nut a10 is very easy to rotate relative to the bolt a20, and the joint clamping of the bolt a20 and the nut a10 on the to-be-installed part 300 fails.

[0029] Furthermore, with the continuous application of an external force to drive the bolt a20 to rotate relative to the nut a10 along the locking direction, the nut a10 has a tendency to move in the direction of the bolt a20. When the bolt a20 rotates continuously relative to the threaded hole a10a along the locking direction and the applied external force overcomes the tensile strength of the nut a10, the bolt a20 deforms in the radial direction to form a deformed part, and the deformed part of the nut a10 abuts against the orifice of the through hole 300a. Since when the above-mentioned riveting is realized, the deformed part has elastic potential energy, that is, there is an elastic force for the deformed part to press the to-be-installed part 300, so as to reduce the risk of the nut a10 disengaging from the bolt a20, thereby increasing the anti-vibration performance of the to-be-installed part 300.

[0030] As the riveting assembly 200 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 screw hole a10a and the through hole 300a of the to-be-installed part 300 through the gap between the deformed part and the to-be-installed part 300, causing the to-be-installed part 300 and the nut a10 to rust. The threads of the screw hole a10a and the bolt a20 are thinner relative to the nut a10 body and are more exposed to air and water. The connection between the nut a10 and the bolt a20 is achieved by the meshing of the threads of the screw hole a10a and the bolt a20. The thread of the bolt a20 is more likely to rust relative to the bolt a20, and the thread of the screw hole a10a is more likely to rust relative to the nut a10 body. It is concluded that the screw connection between the bolt a20 and the nut a10 is likely to fail.

[0031] Please refer to Figures 2 - 3 , the present utility model provides a nut assembly 100, which includes a nut 11 and a sealing ring 20. One end of the sealing ring 20 is disposed on the nut 11. When the nut assembly 100 is installed on the to-be-installed part 300, the sealing ring 20 is located between the nut 11 and the to-be-installed part 300. The bolt a20 passes through the through hole 300a of the to-be-installed part 300 and is then screwed to the nut 11. As the bolt a20 rotates continuously relative to the nut 11 in the locking direction, the nut 11 moves relative to the bolt a20 until the nut 11 abuts against the to-be-installed part 300, and the sealing ring 20 abuts against the nut 11 and the to-be-installed part 300 respectively, so that the gap between the nut assembly 100 and the to-be-installed part 300 is reduced, further reducing the water from entering the through hole 300a of the to-be-installed part 300, thereby solving the problem that the bolt a20 and the nut assembly 100 are likely to rust, and further reducing the risk of the screw connection between the bolt a20 and the nut assembly 100 failing.

[0032] The above-mentioned nut assembly 100 further includes a mounting portion 12 and a screw hole 10a. One end of the mounting portion 12 is fixed to one end of the nut body nut 11, and the screw hole 10a extends from the other end of the mounting portion 12 to the nut 11. The sealing ring 20 is disposed on the end face of one end of the nut 11, and the sealing ring 20 surrounds the mounting portion 12. When the nut assembly 100 is connected to the to-be-installed part 300, the sealing ring 20 is disposed between the end face of one end of the nut 11 and the to-be-installed part 300, and the mounting portion 12 is inserted into the through hole 300a of the to-be-installed part 300 to mount the nut 11 on the to-be-installed part 300. The mounting portion 12 also plays a positioning role, guiding the nut 11 to be inserted into the through hole 300a of the to-be-installed part 300 through the mounting portion 12, so as to realize the quick connection between the nut 11 and the to-be-installed part 300.

[0033] One end face of the above-mentioned nut 11 is recessed with a sealing groove 11a, the sealing ring 20 is arranged in the sealing groove 11a, and a part of the sealing ring 20 protrudes from the sealing groove 11a. When the nut 11 is installed on the part to be installed 300, the part of the sealing ring 20 protruding from the sealing groove 11a abuts against the part to be installed 300.

[0034] One end face of the above-mentioned nut 11 is provided with a step 11b, and the step 11b can bear the part to be installed 300. Optionally, the sealing groove 11a is arranged on the transverse wall of the step 11b, and the part of the sealing ring 20 protruding from the sealing groove 11a is used to abut against the outer surface of the part to be installed 300, or the sealing groove 11a is arranged on the vertical wall of the step 11b, and the part of the sealing ring 20 protruding from the sealing groove 11a is used to abut against the inner surface of the through hole 300a of the part to be installed 300.

[0035] The above-mentioned sealing groove 11a has a first side wall and a second side wall which are oppositely arranged. Along the direction from the first side wall to the second side wall, a first limiting part protrudes from the first side wall, and the first limiting part is flush with the orifice end face of the screw hole 10a. When the sealing ring 20 is installed in the sealing groove 11a, the sealing ring 20 is snapped into the sealing groove 11a by applying an external force. After the sealing ring 20 enters the sealing groove 11a, the first limiting part can limit the sealing ring 20 from disengaging from the sealing groove 11a, reducing the risk that the sealing ring 20 disengages from the nut 11 during transportation or in a vibrating environment, and further solving the technical problem that the sealing ring 20 is prone to loss. Optionally, along the direction from the second side wall to the first side wall, a second limiting part protrudes from the second side wall, and the second limiting part is flush with the orifice end face of the screw hole 10a. When the sealing ring 20 is installed in the sealing groove 11a, the sealing ring 20 is snapped into the sealing groove 11a by applying an external force. After the sealing ring 20 enters the sealing groove 11a, the second limiting part can limit the sealing ring 20 from disengaging from the sealing groove 11a.

[0036] At least one notch is arranged on the above-mentioned first limiting part or the second limiting part, and the notch communicates with the sealing groove 11a. When maintaining or replacing the sealing ring 20 of the nut assembly 100, the notch allows a manual tool to extend into the sealing groove 11a from the notch to take out the sealing ring 20.

[0037] The first limiting part is provided with a first guiding inclined surface, and the first guiding inclined surface is used to guide the sealing ring 20 to be inserted into the sealing groove 11a. Optionally, the second limiting part is provided with a second guiding inclined surface, and the second guiding inclined surface is used to guide the sealing ring 20 to be inserted into the sealing groove 11a.

[0038] In some embodiments, along the direction from one end of the installation part 12 to the other end of the installation part 12, the outer diameter of the cross section of the installation part 12 becomes larger and larger, so that the installation part 12 forms an elastic structure, and the elastic structure abuts against the side wall of the part to be installed 300, reducing the risk that the nut 11 disengages from the part to be installed 300.

[0039] The above-mentioned sealing ring 20 is in a ring structure, and the cross-section of the sealing ring 20 perpendicular to the ring surface is square or circular. The material of the sealing ring 20 is prepared by a flexible material, such as: silica gel, polytetrafluoroethylene, polyurethane, silica gel and fluororubber.

[0040] In an embodiment of the present application, a nut assembly 100 is provided. The nut assembly 100 includes a nut 11, a mounting portion 12, a sealing ring 20 and a screw hole 10a. One end of the mounting portion 12 of the nut 11 is fixed to one end of the nut 11, and the screw hole 10a extends from the other end of the mounting portion 12 to the nut 11. Among them, the mounting portion 12 is used for being inserted into a through hole 300a of a to-be-mounted member 300 to mount the nut 11 on the to-be-mounted member 300. The sealing ring 20 is arranged on the end face of one end of the nut 11, and the sealing ring 20 surrounds the mounting portion 12. When the nut 11 is mounted on the to-be-mounted member 300, the sealing ring 20 is interposed between the end face of one end of the nut 11 and the to-be-mounted member 300, so that the gap between the to-be-mounted member 300 and the nut 11 is reduced, reducing the risk of water entering the screw hole 10a of the nut 11 and part of the bolts a20 in the screw hole 10a, and further reducing the risk of the bolts a20 failing to be screwed with the nut 11.

[0041] The present utility model also provides an embodiment of a fastening device 400. The fastening device 400 includes a bolt a20 and the above-mentioned nut assembly 100. The mounting portion 12 of the nut 11 of the nut assembly 100 is used for being inserted into a through hole 300a of a to-be-mounted member 300 to mount the nut 11 on the to-be-mounted member 300. The bolt a20 passes through the through hole 300a and is screwed into the screw hole 10a of the nut 11 of the nut assembly 100. For the specific structure and function of the fastening assembly, reference can be made to the above-mentioned embodiment, and details will not be repeated here.

[0042] It should be noted that the description and drawings of the present utility model give 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 are not 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 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 according to 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; A mounting portion, one end of which is fixed to one end of the nut, wherein the mounting portion is used to be inserted into a through hole of a component to be mounted so as to mount the nut on the component to be mounted; a screw hole extending from the other end of the mounting portion to the nut; A sealing ring is arranged on the end face of one end of the nut, and the sealing ring surrounds the mounting portion. The sealing ring is used to be cushioned between the end face of one end of the nut and the part to be mounted when the nut is mounted on the part to be mounted.

2. The nut assembly according to claim 1, characterized in that: An end surface of one end of the nut is recessed with a sealing groove; The sealing ring is arranged in the sealing groove, and part of the sealing ring protrudes from the sealing groove. The part of the sealing ring protruding from the sealing groove is used to abut against the part to be installed when the nut is installed on the part to be installed.

3. The nut assembly according to claim 2, 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.

4. The nut assembly according to claim 3, characterized in that: The sealing groove is arranged on the transverse wall of the step, and the portion of the sealing ring protruding from the sealing groove is used to abut against the outer surface of the part to be installed. or, The sealing groove is arranged on the vertical wall of the step, and the portion of the sealing ring protruding from the sealing groove is used to abut against the inner surface of the part to be installed on the through hole.

5. The nut assembly according to claim 2, characterized in that: The sealing groove has a first side wall, a first limiting portion protrudes from the first side wall, and the first limiting portion is used to limit the sealing ring from leaving the sealing groove.

6. The nut assembly according to claim 5, characterized in that: The first limiting portion is provided with at least one notch, the notch is communicated with the sealing groove, and the notch is used for a manual tool to extend from the notch into the sealing groove to take out the sealing ring.

7. The nut assembly according to claim 5, characterized in that: The first limiting portion is provided with a first guiding inclined surface, and the first guiding inclined surface is used to guide the sealing ring to be inserted into the sealing groove.

8. The nut assembly according to claim 5, characterized in that: The sealing groove has a second side wall, the first side wall is arranged opposite to the second side wall, the second side wall is provided with a second limiting portion, and the second limiting portion is used to limit the sealing ring from leaving the sealing groove.

9. The nut assembly according to any one of claims 1 to 8, characterized in that: Along the direction from one end of the mounting portion to the other end of the mounting portion, the outer diameter of the cross section of the mounting portion becomes larger and larger.

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 mounting portion of the nut of the nut assembly is used to be inserted into a through hole of a part to be mounted so as to mount the nut on the part to be mounted, and the bolt passes through the through hole and is screwed into the screw hole of the nut of the nut assembly.

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