CN211901243U - Locknut structure with screw pitch difference - Google Patents
Locknut structure with screw pitch difference Download PDFInfo
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- CN211901243U CN211901243U CN202020119083.7U CN202020119083U CN211901243U CN 211901243 U CN211901243 U CN 211901243U CN 202020119083 U CN202020119083 U CN 202020119083U CN 211901243 U CN211901243 U CN 211901243U
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Abstract
The utility model discloses a locknut structure with a pitch difference, which is screwed on a bolt to fasten a fastened piece, and comprises a fastening nut and a locking nut, wherein the fastening nut is provided with a self-locking external thread; the locking nut is provided with a self-locking internal thread; the self-locking external thread is meshed with the self-locking internal thread; the thread pitches of the self-locking external thread and the self-locking internal thread are larger than the thread pitch of the bolt. The utility model discloses the whole screw in bolt that will fastening nut and lock nut formed during the use, when fastening nut screwed the moment and reached rated torque, twisted lock nut again soon, utilize auto-lock external screw thread, auto-lock internal thread and bolt screw thread's pitch poor, fasten bolt and fastening nut together, reach and prevent that fastening nut from producing not hard up purpose because of the jarring to can improve the fail safe nature of equipment work greatly, reduce the loss that mechanical equipment caused because of the not hard up fault outage rate of screw thread.
Description
Technical Field
The utility model relates to a mechanical fastener technical field, more specifically the utility model relates to a locknut structure with pitch is poor that says so.
Background
The fastener is a mechanical part which is used for fastening connection and has extremely wide application. The fastener is widely used in the industries including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, molds, hydraulic pressure and the like, and various fasteners can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instruments, supplies and the like, and are the most widely applied mechanical basic parts.
However, fasteners applied to important mechanical equipment, mechanical equipment working in dangerous places, mechanical equipment which cannot be frequently stopped for maintenance, mechanical equipment which is complex in structure and difficult to maintain and the like are easy to loosen under the impact, have potential safety hazards and influence the normal use of the mechanical equipment.
Therefore, it is an urgent problem to provide a reliable locknut structure with a pitch difference, which is needed to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a locknut structure with pitch is poor is difficult for producing not hard up, can improve the fail safe nature of equipment work greatly, and then reduces the loss that mechanical equipment caused because of the not hard up fault shutdown of screw thread.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a locknut structure with a thread pitch difference, which is screwed on a bolt to fasten a fastened piece, comprises a fastening nut and a locknut,
the fastening nut is provided with a self-locking external thread; the locking nut is provided with a self-locking internal thread; the self-locking external thread is meshed with the self-locking internal thread;
the thread pitches of the self-locking external thread and the self-locking internal thread are larger than the thread pitch of the bolt.
Furthermore, the cross section of the fastening nut is of a convex structure, and the self-locking external thread is arranged on the upper portion of the convex structure.
Furthermore, the cross section of the locking nut is of a concave structure, and the self-locking internal thread is arranged inside the concave structure.
Through taking above scheme, the beneficial effects of the utility model are that:
the integral screw-in bolt formed by the fastening nut and the locking nut is screwed when the tightening torque of the fastening nut reaches the rated torque, the locking nut is screwed, the self-locking external thread and the self-locking internal thread are utilized to fasten the bolt and the fastening nut together, and the purpose of preventing the fastening nut from loosening due to shock is achieved, so that the safety and reliability of the work of equipment can be greatly improved, the loss of the mechanical equipment caused by the failure and outage rate of the loosening of the thread is reduced, the integral screw-in bolt can be applied to important mechanical equipment, the mechanical equipment working in dangerous places, the mechanical equipment which cannot be frequently shut down for maintenance, and the mechanical equipment which is complex in structure and difficult to maintain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a locknut structure with a pitch difference according to the present invention.
In the figure: 1-bolt, 2-fastened piece, 3-fastening nut, 4-locking nut, 31-self-locking external thread and 41-self-locking internal thread.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment of the present invention discloses a locknut structure with a pitch difference, which is screwed on a bolt 1 to fasten a fastened piece 2, and comprises a fastening nut 3 and a locking nut 4, wherein the fastening nut 3 has a self-locking external thread 31; the locking nut 4 has a self-locking internal thread 41; the self-locking external thread 31 is meshed with the self-locking internal thread 41; the thread pitch of the self-locking external thread 31 and the self-locking internal thread 41 is larger than that of the bolt 1. The utility model discloses the whole screw in bolt that will fastening nut 3 and lock nut 4 form during the use, when fastening nut 3 screws the moment and reaches rated torque, twist lock nut 4 again soon, utilize auto-lock external screw thread 31, the pitch of auto-lock internal thread 41 and bolt 1 screw thread is poor, fasten bolt 1 and fastening nut 3 together, reach and prevent that fastening nut 3 from producing not hard up purpose because of the jarring, thereby can improve the fail safe nature of equipment work greatly, reduce the loss that mechanical equipment caused because of the not hard up fault outage rate of screw thread, can be applied to important mechanical equipment, the mechanical equipment of dangerous place work, the mechanical equipment of maintenance can not often shut down, and the structure is complicated and be difficult to the mechanical equipment of maintenance.
Specifically, the cross section of the fastening nut 3 is of a convex structure, and the self-locking external thread 31 is arranged at the upper part of the convex structure.
Specifically, the cross section of the locking nut 4 is of a concave structure, and the self-locking internal thread 41 is arranged inside the concave structure.
The utility model discloses a theory of operation does: firstly, a locking nut 4 and a fastening nut 3 are meshed and connected together through a self-locking internal thread 41 and a self-locking external thread 31 of the fastening nut 4 in advance, then the whole formed by the fastening nut 3 and the locking nut 4 is screwed into the bolt when in use, when the screwing torque of the fastening nut 3 reaches the rated torque, the locking nut 4 is screwed, the internal thread of the fastening nut 3 is tightly combined with the lower end face of the thread of the bolt 1 at the moment, the thread pitches of the self-locking external thread 31 and the self-locking internal thread 41 are greater than the thread pitch of the bolt 1, the moving distance of the locking nut 4 is greater than the thread distance of the bolt 1 under the condition of the same rotation angle, the internal thread of the locking nut 4 is tightly combined with the upper end face of the thread of the bolt 1 at the moment, when the impact is received, the fastening nut 3 generates a rotating force along the direction of the lower end face, the two rotating forces are opposite in direction, so that the fastening nut 3 and the locking nut 4 can be automatically screwed, the thread pitches of the self-locking external thread 31 and the self-locking internal thread 41 are larger than the thread pitch of the bolt 1, and the moving distance of the locking nut 4 is larger than the thread distance of the bolt 1 under the condition of the same rotating angle, so that the bolt 1 and the fastening nut 3 are firmly fastened together, and the fastening nut 3 is prevented from loosening.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A locknut structure with a thread pitch difference is screwed on a bolt to fasten a fastened piece, and is characterized by comprising a fastening nut and a locking nut,
the fastening nut is provided with a self-locking external thread; the locking nut is provided with a self-locking internal thread; the self-locking external thread is meshed with the self-locking internal thread;
the thread pitches of the self-locking external thread and the self-locking internal thread are larger than the thread pitch of the bolt.
2. The locknut structure with the pitch difference as claimed in claim 1, wherein the cross section of the fastening nut is a convex structure, and the self-locking external thread is arranged at the upper part of the convex structure.
3. The locknut structure with the pitch difference as claimed in claim 1, wherein the cross section of the locknut is of a concave structure, and the self-locking internal thread is arranged inside the concave structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119083.7U CN211901243U (en) | 2020-01-19 | 2020-01-19 | Locknut structure with screw pitch difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119083.7U CN211901243U (en) | 2020-01-19 | 2020-01-19 | Locknut structure with screw pitch difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901243U true CN211901243U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020119083.7U Active CN211901243U (en) | 2020-01-19 | 2020-01-19 | Locknut structure with screw pitch difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211901243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120494A (en) * | 2020-01-19 | 2020-05-08 | 时元成 | Locknut structure with screw pitch difference |
-
2020
- 2020-01-19 CN CN202020119083.7U patent/CN211901243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120494A (en) * | 2020-01-19 | 2020-05-08 | 时元成 | Locknut structure with screw pitch difference |
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