Anti-loosening maintenance-free bolt for tower
By designing anti-loosening limit teeth and anti-rotating wedges in bolts of steel buildings such as poles and towers, combined with the thread design of large-diameter and small-diameter sections, the anti-loosening and maintenance-free effects are achieved, and the bolt loosening and maintenance safety problems in steel buildings are solved.
Patent Information
- Application Number
- CN202421823434.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Steel buildings such as poles and towers will cause bolts and nuts to be loose under the action of natural wind, and require regular maintenance to ensure tightness, but this poses a personal safety hazard and is cumbersome.
A pole tower anti-loosening and dimensionality-free bolt is designed. By setting large-diameter sections and small-diameter sections in the bolts, the nuts are divided into pre-tightening nuts and locking nuts, and grooves are processed on the outside of the small-diameter section to wedge anti-rotating wedges to limit the rotation of the locking nuts, achieving anti-loosening and maintenance-free.
It effectively prevents the looseness of bolts and nuts, improves the reliability of fastening connections, reduces maintenance tasks, reduces workers' labor intensity and ensures personal safety.
Smart Images
Figure CN222894490U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical fasteners, and in particular relates to a tower anti-loosening maintenance-free bolt. Background Art
[0002] Steel structures such as poles and towers are common in the electric power industry, communications industry, chemical industry and other fields. The tightness of the connections between the various parts of the poles and towers directly affects the reliability of the entire steel structure. Under the action of wind in nature, steel structures such as poles and towers will shake and vibrate, causing the bolts and nuts used for fastening connections to loosen. In order to ensure the stability of steel structures such as poles and towers, workers are required to climb and inspect and maintain them regularly to ensure that the bolts and nuts are tightly connected. However, regular maintenance is extremely dangerous and personal safety cannot be guaranteed. Therefore, the development of a loose-proof and maintenance-free bolt has become an urgent problem to be solved by technicians in this field. Utility Model Content
[0003] In order to solve the problems in the background technology, the utility model provides a pole tower anti-loosening and maintenance-free bolt. The utility model has the characteristics of anti-loosening and maintenance-free, greatly improves the reliability of the fastening connection, and saves the tedious task of subsequent maintenance.
[0004] The technical scheme provided by the utility model is: a maintenance-free bolt for preventing loosening of a pole tower, comprising a bolt and a nut; the bolt comprises a large diameter section and a small diameter section, and the threads of the large diameter section and the small diameter section are in opposite directions; the nut comprises a pre-tightening nut and a locking nut, wherein the pre-tightening nut is screwed on the large diameter section, and the locking nut is screwed on the small diameter section, the end face of the pre-tightening nut close to the locking nut is provided with an anti-loosening limiting tooth A, and the end face of the locking nut close to the pre-tightening nut is provided with an anti-loosening limiting tooth B, and the anti-loosening limiting tooth B is engaged with the anti-loosening limiting tooth A, so that the two nuts are mutually restricted and limited; an axial groove is processed on the outer side of the small diameter section, and when the locking nut is screwed on the small diameter section, an anti-rotation wedge is wedged into the groove.
[0005] A further technical solution is that the thread on the large diameter section is a right-hand thread, and the thread on the small diameter section is a left-hand thread.
[0006] A further technical solution is: the cross section of the groove is triangular, and the anti-rotation wedge is a triangular wedge matched with the groove.
[0007] A further technical solution is that the hardness of the anti-rotation wedge is higher than the hardness of the locking nut.
[0008] 1. The two nuts of the utility model are screwed on two sections of bolts with different rotation directions. The two nuts are close to each other and limit each other. The end faces of the two nuts close to each other are provided with anti-loosening limiting teeth that bite into each other, which further play the effect of mutual restraint and mutual limitation. In addition, the grooves arranged in the small diameter section and the wedged anti-rotation wedges further limit the rotation of the locking nut, so that the utility model reaches the level of anti-loosening and maintenance-free.
[0009] 2. The utility model has a simple structure, is easy to manufacture and use, has high reliability after installation, and its maintenance-free feature greatly reduces the labor intensity of workers and ensures their personal safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the utility model.
[0011] Figure 2 It is a plan view of the anti-loosening limiting tooth A on the end face of the pre-tightening nut in the utility model.
[0012] Figure 3 It is a plan view of the anti-loosening limiting teeth B on the end face of the locking nut in the utility model.
[0013] Figure 4 yes Figure 1 A-direction view.
[0014] In the figure: 1. Large diameter section; 2. Pre-tightening nut; 3. Locking nut; 4. Small diameter section; 5. Groove; 6. Anti-loosening limit tooth A; 7. Anti-loosening limit tooth B; 8. Anti-rotation wedge. DETAILED DESCRIPTION
[0015] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0016] Example 1: Reference Figure 1-Figure 4The present embodiment discloses a tower anti-loosening maintenance-free bolt, which specifically includes a bolt and two nuts. The bolt includes a large diameter section 1 and a small diameter section 4. The thread on the large diameter section 1 is a right-handed thread, and the thread on the small diameter section 4 is a left-handed thread. One of the two nuts is a pre-tightening nut 2, and the other is a locking nut 3. The pre-tightening nut 2 is a right-handed thread, and the pre-tightening nut 2 is screwed on the large diameter section 1. The locking nut 3 is a left-handed thread, and the locking nut 3 is screwed on the small diameter section 4. The end face of the pre-tightening nut 2 close to the locking nut 3 is provided with an anti-loosening limit tooth A6, and the end face of the locking nut 3 close to the pre-tightening nut 2 is provided with an anti-loosening limit tooth B7. The anti-loosening limit tooth B7 is engaged with the anti-loosening limit tooth A6, so that the two nuts are mutually restricted and limited. In addition, an axial groove 5 is processed on the outer side of the small diameter section 4. When the locking nut 3 is tightened in the small diameter section 4, an anti-rotation wedge is wedged into the groove 5. The hardness of the anti-rotation wedge is greater than the hardness of the locking nut 3. The wedging process of the anti-rotation wedge 8 will damage the thread of the locking nut 3, thereby limiting the rotation of the locking thread.
[0017] As a preferred solution, the cross section of the groove 5 is triangular, and the anti-rotation wedge 8 is a triangular wedge matched with the groove 5 .
[0018] Embodiment 2: Different from Embodiment 1, in this embodiment, the thread on the large diameter section 1 is a left-handed thread, the thread on the small diameter section 4 is a right-handed thread, the pre-tightening nut 2 is a left-handed thread, and the pre-tightening nut 2 is screwed on the large diameter section; the locking nut 3 is a right-handed thread, and the locking nut 3 is screwed on the small diameter section.
[0019] To sum up, the two nuts of the present application are screwed on two sections of bolts with different rotation directions, the two nuts are close to each other and limit each other, and the end faces of the two nuts close to each other are equipped with anti-loosening limiting teeth that bite into each other, which further play the effect of mutual restraint and mutual limitation; in addition, the groove 5 set in the small diameter section 4 and the wedged anti-rotation wedge further limit the rotation of the locking nut 3, so that the utility model reaches the level of anti-loosening and maintenance-free.
Claims
1. A tower anti-loosening maintenance-free bolt, comprising a bolt and a nut, characterized in that: The bolt comprises a large diameter section (1) and a small diameter section (4), wherein the threads of the large diameter section (1) and the small diameter section (4) are screwed in opposite directions; the nut comprises a pre-tightening nut (2) and a locking nut (3), wherein the pre-tightening nut (2) is screwed onto the large diameter section (1), and the locking nut (3) is screwed onto the small diameter section (4); the end face of the pre-tightening nut (2) close to the locking nut (3) is provided with an anti-loosening limiting tooth A (6), and the end face of the locking nut (3) close to the pre-tightening nut (2) is provided with an anti-loosening limiting tooth B (7), and the anti-loosening limiting tooth B (7) is engaged with the anti-loosening limiting tooth A (6), so that the two nuts are mutually restrained and limited; the outer side of the small diameter section (4) is processed with an axial groove (5), and when the locking nut (3) is screwed onto the small diameter section (4), an anti-rotation wedge is wedged into the groove (5).
2. A tower anti-loosening maintenance-free bolt according to claim 1, characterized in that: The thread on the large diameter section (1) is a right-hand thread, and the thread on the small diameter section (4) is a left-hand thread.
3. The tower anti-loosening maintenance-free bolt according to claim 1, characterized in that: The cross section of the groove (5) is triangular, and the anti-rotation wedge (8) is a triangular wedge that matches the groove (5).
4. A tower anti-loosening maintenance-free bolt according to claim 3, characterized in that: The hardness of the anti-rotation wedge is higher than the hardness of the locking nut (3).