End face ratchet wheel type bolt anti-loosening structure
Through the end-face ratchet bolt anti-loose structure, the meshing end-face ratchet and Down's threaded rod design solves the problem of bolt connection loose under vibration and thermal shock, achieving a stable connection effect and a simplified structure, reducing maintenance costs.
Patent Information
- Application Number
- CN202422501488.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-16
AI Technical Summary
The existing bolted connection structure is prone to loosening under vibration and thermal shock, resulting in structural failure. The existing anti-loosening structure is complex or uses too many parts, so it is unable to effectively deal with continuous vibration shock.
The end-face ratchet bolt anti-loosening structure is adopted. By setting an inter-meshable end-face ratchet on the end face of the nut, combined with the Down threaded rod and annular groove design, a stable locking structure is formed, which simplifies the number of parts and improves the stability and reliability of the connection.
The stability and reliability of bolt connections in vibration and thermal shock environments are achieved, the structural design is simplified and maintenance costs are reduced.
Smart Images
Figure CN223062890U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fastener anti-loosening, in particular to an end-face ratchet type bolt anti-loosening structure. Background Art
[0002] Bolt connection structures are widely used in various key structure connections, such as aero-engines, satellite load-bearing cylinders, etc. However, such structures are easily affected by environmental factors such as vibration shock and thermal shock, resulting in loosening and thus causing structural failures.
[0003] However, the existing bolt anti-loosening structures either adopt complex structural designs, use too many small parts, or cannot cope with the impact of continuous vibration. Therefore, it is necessary to design a bolt anti-loosening structure with higher reliability while reducing the structural complexity as much as possible. Summary of the Invention
[0004] For this reason, the purpose of the utility model is to provide an end-face ratchet type bolt anti-loosening structure in view of the defects and deficiencies of the existing bolt anti-loosening structures.
[0005] The purpose of the utility model is realized by the following technical solutions.
[0006] An end-face ratchet type bolt anti-loosening structure includes a bolt, a first nut and a second nut arranged on the bolt. Opposite ends of the first nut and the second nut are respectively provided with end-face ratchets that can be engaged with each other.
[0007] As a further optimization of the utility model, the end-face ratchet on the first nut is integrally provided with the first nut, and the end-face ratchet on the second nut is integrally provided with the second nut.
[0008] As a further optimization of the utility model, a plurality of ratchet teeth are radially distributed on the end-face ratchet, and an inter-tooth through groove is provided between the ratchet teeth.
[0009] As a further optimization of the utility model, a threaded hole peripheral boss is provided at the center of the end-face ratchet, and the end face of the threaded hole peripheral boss is not higher than the plane where the tooth tops of the ratchet teeth are located and not lower than the plane where the tooth roots of the ratchet teeth are located.
[0010] As a further optimization of the utility model, an annular groove is provided on the outer periphery of the threaded hole peripheral boss of the end-face ratchet, and the inter-tooth through groove extends to the annular groove.
[0011] As a further optimization of the utility model, opposite ends of the first nut and the second nut are respectively fixedly connected with end-face ratchets that can be engaged with each other.
[0012] As a further optimization of the present utility model, thread hole peripheral bosses are integrally formed at one end of the first nut and one end of the second nut, and the end face of the thread hole peripheral boss is not higher than the plane where the tooth crest of the end face ratchet wheel is located and not lower than the plane where the tooth root of the end face ratchet wheel is located.
[0013] As a further optimization of the present utility model, an annular groove is provided on the end face ratchet wheel and outside the periphery of the thread hole peripheral boss. A plurality of ratchet teeth are evenly distributed radially on the end face ratchet wheel, and an inter-tooth through groove is provided between the ratchet teeth, and the inter-tooth through groove extends to the annular groove.
[0014] As a further optimization of the present utility model, the screw rod of the bolt is a Tang's screw rod, and the thread rotation direction of the first nut is opposite to that of the second nut.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The bolt loosening prevention structure of the present utility model adopts end face ratchet wheels that can be meshed with each other relatively at one end of the first nut and one end of the second nut respectively. The locking structure formed by the mutual meshing between the end face ratchet wheels can well meet the stability and reliability of the corresponding structure connection; at the same time, the bolt loosening prevention structure of the present utility model is ingeniously designed, simple to install and operate, and has a low maintenance cost. Description of the Drawings
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art to explain the principle of the present utility model. In addition, obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 is a schematic diagram of a bolt loosening prevention structure with an end face ratchet wheel according to the present utility model;
[0018] Figure 2 is a schematic diagram of the first nut in a bolt loosening prevention structure with an end face ratchet wheel according to the present utility model;
[0019] Figure 3 is a top view of the first nut in a bolt loosening prevention structure with an end face ratchet wheel according to the present utility model;
[0020] Figure 4 is a cross-sectional view of the first nut in a bolt loosening prevention structure with an end face ratchet wheel according to the present utility model;
[0021] Figure 5 is a cross-sectional view of the second nut in a bolt loosening prevention structure with an end face ratchet wheel according to the present utility model;
[0022] Figure 6 is a locking schematic diagram of a face ratchet type bolt loosening prevention structure of the present utility model;
[0023] Figure 7 is a cross-sectional view when the face ratchet type bolt loosening prevention structure of the present utility model is locked. Specific embodiments
[0024] To better understand the present utility model, more detailed descriptions of various aspects of the present utility model will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the embodiments of the present utility model and do not limit the scope of the present utility model in any way. It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another feature and do not represent any limitation on the features.
[0025] It should also be understood that the terms "comprising", "including", "having", "containing" and / or "including having", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0027] Please refer to Figures 1 to 7 , the embodiment of the present utility model provides a face ratchet type bolt loosening prevention structure, and the bolt loosening prevention structure includes a bolt 5, a first nut 1 and a second nut 2. Among them, both the first nut 1 and the second nut 2 can be threadedly connected to the bolt 5, and end face ratchets 6 that can be engaged with each other are respectively fixedly provided at one ends of the first nut 1 and the second nut 2. By engaging the end face ratchet 6 on the first nut 1 with the end face ratchet 6 on the second nut 2, the first nut 1 and the second nut 2 can be brought into a locked state, and thus the corresponding connected parts can be connected more stably and reliably.
[0028] Specifically, the above-mentioned bolt 5 includes a hexagonal head 3 and a screw rod 4. The thread specifications on the screw rod 4 match those on the first nut 1 and the second nut 2, so that the first nut 1 and the second nut 2 can be firmly connected to the bolt 5 by a threaded connection. More preferably, the screw rod 4 is a Tang's screw rod with double helix directions, equal cross-sections, and discontinuous threads. At the same time, the thread helix directions of the first nut 1 and the second nut 2 are set in opposite directions, which can make the connection between the first nut 1 and the second nut 2 and the bolt 5 less likely to loosen and more stable and reliable.
[0029] On one end of the first nut 1 and one end of the second nut 2, end face ratchets 6 that can mesh with each other are respectively fixedly arranged oppositely. On the other ends of the first nut 1 and the second nut 2, connection parts 7 that match the screw rod 4 are arranged in a back-to-back manner. The connection part 7 is similar to a hexagonal nut. In some embodiments, the end face ratchet 6 on the first nut 1 is integrally formed with the first nut 1, and the end face ratchet 6 on the second nut 2 is integrally formed with the second nut 2. In other embodiments, on one end of the first nut 1 and one end of the second nut 2, end face ratchets 6 that can mesh with each other are respectively fixedly connected oppositely. That is, the end face ratchet 6 arranged on one end of the first nut 1 is not integrally formed with the first nut 1, and the end face ratchet 6 arranged on one end of the second nut 2 is not integrally formed with the second nut 2 either. Instead, the first nut 1 and the end face ratchet 6, and the second nut 2 and the end face ratchet 6 are all separately arranged, and the first nut 1 and the end face ratchet 6, and the second nut 2 and the end face ratchet 6 are firmly connected by welding or other means.
[0030] In some embodiments, the end face ratchet 6 on the first nut 1 is integrally formed with the first nut 1, and the end face ratchet 6 on the second nut 2 is integrally formed with the second nut 2. And the end face ratchet 6 on the first nut 1 can mesh with the end face ratchet 6 on the second nut 2 to form a locking and anti-loosening structure. More preferably, the same number of ratchet teeth 8 are evenly arranged radially on the end face ratchets 6 on the first nut 1 and the second nut 2. On the ratchet teeth 8 on the first nut 1, a first nut working tooth surface 11 is arranged, and on the ratchet teeth 8 on the second nut 2, a second nut working tooth surface 12 is arranged. And when the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the first nut working tooth surface 11 can be in mutual contact with the second nut working tooth surface 12. Further, an inter-tooth through groove is arranged between the ratchet teeth 8. The inter-tooth through groove is arranged at the tooth root of the end face ratchet 6, so that the first nut working tooth surface 11 and the second nut working tooth surface 12 can be in better mutual contact, and the end face ratchet 6 on the first nut 1 and the end face ratchet 6 on the second nut 2 can be meshed with each other more firmly.
[0031] As a further improvement of the above-described embodiment, a threaded hole peripheral boss 9 is provided at the center of the end face ratchet 6 on the first nut 1 and at the center of the end face ratchet 6 on the second nut 2. An avoidance hole communicating with the threaded hole of the first nut 1 or the second nut 2 is provided at the center of the threaded hole peripheral boss 9 to prevent interference between the screw rod 4 on the bolt 5 and the first nut 1 or the second nut 2. At the same time, the plane where the end face of the threaded hole peripheral boss 9 is located is not higher than the plane where the tooth tops of the ratchet teeth 8 are located and not lower than the plane where the tooth roots of the ratchet teeth 8 are located. More preferably, the plane where the end face of the threaded hole peripheral boss 9 is located is at the middle position between the plane where the tooth tops of the ratchet teeth 8 are located and the plane where the tooth roots of the ratchet teeth 8 are located, that is, the plane where the end face of the threaded hole peripheral boss 9 is located can pass through the middle position of the working tooth surface 11 of the first nut or the working tooth surface 12 of the second nut. When the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the working tooth surface 11 of the first nut can just fit with the working tooth surface 12 of the second nut, and the threaded hole peripheral boss 9 on the first nut 1 can just fit with the threaded hole peripheral boss 9 on the second nut 2, thereby avoiding the over-rotation of the second nut 2 resulting in an interference fit and warping between the end face ratchet 6 on the first nut 1 and the end face ratchet 6 on the second nut 2, and further enabling the end face ratchet 6 on the first nut 1 to better mesh and lock with the end face ratchet 6 on the second nut 2.
[0032] As a further improvement of the above-described embodiment, an annular groove 10 is provided on the outer periphery of the threaded hole peripheral boss 9 of the end face ratchet 6. The bottom surface of the annular groove 10 is lower than the plane where the tooth roots of the ratchet teeth 8 are located, and the inter-tooth through groove between the ratchet teeth 8 can extend to the annular groove 10, so that the annular groove 10 and the inter-tooth through groove can form a structure similar to a simply supported beam, thereby enabling the ratchet teeth 8 to have a certain elasticity in the axial direction. Further, when the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the working tooth surface 12 of the second nut and the working tooth surface 11 of the first nut can be lifted and then rebound, and thus it is easier to form a more stable meshing and locking structure when the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2.
[0033] As a further optimization of the above-described embodiment, the tooth surface slopes of the working tooth surface 11 of the first nut and the working tooth surface 12 of the second nut are small to facilitate the meshing of the end face ratchet 6 on the first nut 1 with the end face ratchet 6 on the second nut.
[0034] In some other embodiments, end face ratchets 6 that can mesh with each other are fixedly connected to one ends of the first nut 1 and the second nut 2 respectively in a relative manner. That is, the end face ratchet 6 provided at one end of the first nut 1 is not integrally formed with the first nut 1, and the end face ratchet 6 provided at one end of the second nut 2 is not integrally formed with the second nut 2 either. The first nut 1 and the end face ratchet 6, and the second nut 2 and the end face ratchet 6 are fixedly connected by means such as welding. In this embodiment, a threaded hole peripheral boss 9 is integrally formed at one end of the first nut 1 and one end of the second nut 2. The plane where the end face of the threaded hole peripheral boss 9 is located is not higher than the plane where the tooth crest of the end face ratchet 6 is located and not lower than the plane where the tooth root of the end face ratchet 6 is located. More preferably, the plane where the end face of the threaded hole peripheral boss 9 is located is at the middle position between the plane where the tooth crest of the end face ratchet 6 is located and the plane where the tooth root of the end face ratchet 6 is located. When the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the threaded hole peripheral boss 9 on the first nut 1 can just fit with the threaded hole peripheral boss 9 on the second nut 2, so as to avoid the transitional fit between the end face ratchet 6 on the first nut 1 and the end face ratchet 6 on the second nut 2. Further, an annular groove 10 is provided on the end face ratchet 6 and outside the threaded hole peripheral boss 9. The bottom surface of the annular groove 10 is lower than the plane where the tooth root of the end face ratchet 6 is located. At the same time, the same number of ratchet teeth 8 are evenly arranged in the radial direction of the end face ratchet 6 on the first nut 1 and the end face ratchet 6 on the second nut 2. A first nut working tooth surface 11 is provided on the ratchet teeth 8 of the first nut 1, and a second nut working tooth surface 12 is provided on the ratchet teeth 8 of the second nut 2. When the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the first nut working tooth surface 11 can just fit with the second nut working tooth surface 12, and the threaded hole peripheral boss 9 on the first nut 1 can just fit with the threaded hole peripheral boss 9 on the second nut 2. Moreover, an inter-tooth through groove is provided between the ratchet teeth 8, and the inter-tooth through groove can extend to the annular groove 10. When the first nut working tooth surface 11 fits with the second nut working tooth surface 12 and the threaded hole peripheral boss 9 on the first nut 1 fits with the threaded hole peripheral boss 9 on the second nut 2, it can not only avoid the transitional fit and warping phenomenon between the end face ratchet 6 on the first nut 1 and the end face ratchet 6 on the second nut 2 caused by the excessive screwing-in of the second nut 2, but also because the annular groove 10 and the inter-tooth through groove can form a structure similar to a simply supported beam, so that the ratchet teeth 8 have a certain elasticity in the axial direction. Furthermore, when the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2, the second nut working tooth surface 12 and the first nut working tooth surface 11 can be lifted and then rebound from each other, so that it is easier to form a more stable meshing and locking structure when the end face ratchet 6 on the first nut 1 meshes with the end face ratchet 6 on the second nut 2.
[0035] In practical applications, when using an end-face ratchet type bolt loosening prevention structure in an embodiment of the present utility model to fasten a connected part, the connecting portion 7 on the first nut 1 can be sleeved on the screw rod 4 of the bolt 5 towards the connected part first, and the first nut 1 is rotated until the connecting portion 7 on the first nut 1 abuts against the connected part. At this time, the end-face ratchet 6 on the first nut 1 faces away from the connected part; after confirming that the end face of the connecting portion 7 on the first nut 1 fits correctly with the connected part, the end-face ratchet 6 on the second nut 2 is sleeved on the screw rod 4 towards the connected part while the connecting portion 7 on the second nut 2 faces away from the connected part, and the second nut 2 is rotated until the end-face ratchet 6 on the second nut 2 is close to the end-face ratchet 6 on the first nut 1, and the end-face ratchet 6 on the second nut 2 and the end-face ratchet 6 on the first nut 1 are meshed with each other to form a locking structure.
[0036] In the embodiment of the present utility model, the connecting portion 7 of the first nut 1 is threadedly connected to the screw rod 4 of the bolt 5, so that the first nut 1 can be locked by the pre-tightening force of the screw thread of the screw rod 4, forming the first-stage locking of the first nut 1; the end-face ratchet 6 on the first nut 1 and the end-face ratchet 6 on the second nut 2 are meshed with each other, and the first nut working tooth surface 11 on the first nut 1 and the second nut working tooth surface 12 on the second nut 2 are mutually attached, so that the first nut working tooth surface 11 on the first nut 1 is restricted by the second nut working tooth surface 12 on the second nut 2, forming the second-stage locking of the first nut 1; the screw rod 4 adopts a Tang's screw rod, and the thread rotation direction of the first nut 1 is opposite to that of the second nut 2, forming the third-stage locking of the first nut 1. Correspondingly, the connecting portion 7 of the second nut 2 is threadedly connected to the screw rod 4 of the bolt 5, so that the second nut 2 can be locked by the pre-tightening force of the screw thread of the screw rod 4, forming the first-stage locking of the second nut 2; the end-face ratchet 6 on the first nut 1 and the end-face ratchet 6 on the second nut 2 are meshed with each other, and the first nut working tooth surface 11 on the first nut 1 and the second nut working tooth surface 12 on the second nut 2 are mutually attached, so that the second nut working tooth surface 12 on the second nut 2 is restricted by the first nut working tooth surface 11 on the first nut 1, forming the second-stage locking of the second nut 2. In addition, the annular groove 10 on the end-face ratchet 6 combined with the tooth-interval through groove can form a structure similar to a simply supported beam, so that when the end-face ratchet 6 on the first nut 1 and the end-face ratchet 6 on the second nut 2 are meshed with each other, the second nut working tooth surface 12 and the first nut working tooth surface 11 can be mutually lifted and then rebound, so that it is easier to form a more stable meshing locking structure when the end-face ratchet 6 on the first nut 1 and the end-face ratchet 6 on the second nut 2 are meshed with each other.
[0037] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0038] The above-described embodiments merely represent several implementation manners of the present utility model. The descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.
Claims
1. An end-face ratchet type bolt loosening prevention structure, characterized in that It includes a bolt, a first nut and a second nut provided on the bolt. Opposite ends of the first nut and the second nut are respectively provided with end face ratchets that can mesh with each other.
2. The anti-loosening structure of the end-face ratchet type bolt according to claim 1, characterized in that, The end face ratchet on the first nut is integrally provided with the first nut, and the end face ratchet on the second nut is integrally provided with the second nut.
3. The end-face ratchet type bolt loosening prevention structure according to claim 2, characterized in that, A plurality of ratchet teeth are radially and uniformly distributed on the end face ratchet, and an inter-tooth through groove is provided between the ratchet teeth.
4. The anti-loosening structure of the end-face ratchet-type bolt according to claim 3, wherein, A threaded hole peripheral boss is provided at the center of the end face ratchet. The end face of the threaded hole peripheral boss is not higher than the plane where the tooth tops of the ratchet teeth are located and not lower than the plane where the tooth roots of the ratchet teeth are located.
5. The anti-loosening structure of the end-face ratchet-type bolt according to claim 4, characterized in that, An annular groove is provided on the outer periphery of the threaded hole peripheral boss of the end face ratchet, and the inter-tooth through groove extends to the annular groove.
6. The anti-loosening structure of the end-face ratchet-type bolt according to claim 1, wherein, Opposite ends of the first nut and the second nut are respectively fixedly connected with end face ratchets that can mesh with each other.
7. The anti-loosening structure of the end-face ratchet-type bolt according to claim 6, wherein, Threaded hole peripheral bosses are integrally formed at one ends of the first nut and the second nut. The end face of the threaded hole peripheral boss is not higher than the plane where the tooth tops of the end face ratchet are located and not lower than the plane where the tooth roots of the end face ratchet are located.
8. The end-face ratchet type bolt loosening prevention structure according to claim 7, characterized in that, An annular groove is provided on the outer periphery of the threaded hole peripheral boss on the end face ratchet. A plurality of ratchet teeth are radially and uniformly distributed on the end face ratchet. An inter-tooth through groove is provided between the ratchet teeth, and the inter-tooth through groove extends to the annular groove.
9. The anti-loosening structure of the end-face ratchet-type bolt according to claim 1, characterized in that, The screw rod of the bolt is a Tang's screw rod, and the thread rotation direction of the first nut is opposite to that of the second nut.