Anti-loosening fastener

Abstract

The utility model discloses a kind of anti-loose fasteners, including mounting hole, locking screw is set in mounting hole inside by thread activity screwing, the upper end of locking screw is fixedly provided with nut, locking screw and mounting hole between are provided with anti-loose mechanism, the anti-loose mechanism includes fixed ring, movable ring, connecting ring, clamping slot, pawl, the outside of mounting hole is fixedly provided with fixed ring, the movable ring is movably set on the outside surface of nut, the lower end of movable ring is fixedly provided with connecting ring, the outside surface of fixed ring is evenly provided with several clamping slots, the outside surface of connecting ring lower end is evenly fixedly provided with several pawls, the utility model is provided with anti-loose mechanism, can effectively prevent the loosening situation of bolt due to vibration occurs, and overall fixation and existing technology bolt tightening are consistent, simple operation is not complicated, so as to facilitate popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to an anti-loosening fastener. Background Technology

[0002] Existing anti-loosening fasteners come in various types, each with its own characteristics: spring washers utilize elastic deformation and bevel resistance to achieve basic anti-loosening, offering low cost but limited effectiveness; double nuts enhance friction through axial force, but require tightening two nuts, which is cumbersome; chemical locking agents fill thread gaps, providing excellent anti-loosening after curing, but require special handling for disassembly, making disassembly inconvenient. In summary, while there are many types of such anti-loosening fasteners in the existing technology, those that are simple to operate have poor anti-loosening effects, while those with good anti-loosening effects are cumbersome to operate. Therefore, an improved anti-loosening fastener is needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide an anti-loosening fastener to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening fastener, comprising a mounting hole, a locking screw being screwed into the mounting hole via a thread, a nut being fixedly mounted on the upper end of the locking screw, and an anti-loosening mechanism being provided between the locking screw and the mounting hole, the anti-loosening mechanism comprising a fixed ring, a movable ring, a connecting ring, a groove, and a tooth; a fixed ring being fixedly mounted on the outer side of the mounting hole, a movable ring being movably fitted on the outer surface of the nut, a connecting ring being fixedly mounted on the lower end of the movable ring, a plurality of grooves being evenly formed on the outer surface of the fixed ring, and a plurality of teeth being evenly fixedly mounted on the outer surface of the lower end of the connecting ring.

[0005] Preferably, the cross-section of the slot and the tooth is trapezoidal, such as... Figure 6 As shown, the trapezoidal inclined surfaces of the retaining teeth and the retaining groove fit together. When the locking screw is tightened, the retaining teeth will rotate to the left. The inclined surfaces of the retaining groove and the retaining teeth will press against each other, thereby pushing the movable ring upward and preventing the retaining teeth and the retaining groove from obstructing each other. When the locking screw is about to loosen, the retaining teeth will rotate to the right, causing the vertical surfaces of the retaining teeth and the retaining groove to come into contact and form an obstruction. This effectively prevents the locking screw from reversing and loosening.

[0006] Preferably, a spring is fitted on the outer surface of the locking screw at the lower end of the movable ring. The lower end of the spring is fixedly connected to the locking screw, and the upper end of the spring is fixedly connected to the movable ring. The spring can automatically retract to drive the movable ring and the connecting ring to move downward, so as to ensure that the locking teeth and the locking groove can remain engaged.

[0007] Preferably, a rubber ring is fixedly provided on the outer surface of the nut, and the outer surface of the rubber ring is in contact with the outer surface of the movable ring. Under the action of the rubber ring, the friction between the nut and the movable ring can be significantly increased. This can effectively prevent the movable ring from moving up and down continuously due to vibration. This friction can be used to counteract and dissipate the kinetic energy during vibration.

[0008] Preferably, the outer surface of the movable ring is provided with an anti-slip groove. Since this device needs to ensure that the locking teeth and the slots are disengaged when the locking screws are removed, this protective groove allows the operator to easily pull up the movable ring and the connecting ring, so that the connecting ring moves up and the locking teeth and slots are disengaged.

[0009] Preferably, multiple slots and teeth are provided and are evenly distributed on the outer surfaces of the fixing ring and the connecting ring. Multiple slots and teeth can reduce the engagement gap, and the teeth and slots can be more easily engaged after the locking screw is tightened. Even a slight loosening of the locking screw will cause engagement.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model achieves core anti-loosening through the cooperation of trapezoidal teeth and slots. When the locking screw tends to loosen, the vertical surfaces of the teeth and slots abut against each other to form a rigid barrier, effectively preventing the locking screw from reversing. Compared with the elastic anti-loosening of spring washers, this structure is more stable and less prone to failure. At the same time, in conjunction with the elastic force of the spring, it can always drive the moving ring and connecting ring to move downward, ensuring that the teeth and slots remain engaged, avoiding vibration that could cause the teeth to disengage from the slots, and further improving the reliability of anti-loosening.

[0012] 2. The assembly process of this utility model is basically the same as the traditional bolt tightening operation. It only requires screwing the locking screw into the mounting hole and tightening it. During the tightening process, the retaining teeth rotate to the left with the locking screw. The retaining teeth and the trapezoidal inclined surface of the retaining groove squeeze each other, which can push the movable ring to move up automatically. It will not hinder the tightening operation of the locking screw, and no additional complicated steps are required, which solves the problem of cumbersome operation of double nut and other structures. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an anti-loosening fastener according to the present invention;

[0014] Figure 2 This is a disassembly view of the locking screw in an anti-loosening fastener according to the present invention;

[0015] Figure 3 This utility model relates to an anti-loosening fastener. Figure 2 A bottom view;

[0016] Figure 4 This is a cross-sectional view of an anti-loosening fastener according to the present invention;

[0017] Figure 5 This utility model relates to an anti-loosening fastener. Figure 4 The front view;

[0018] Figure 6 This is a cross-sectional view of the slot of the locking tooth in an anti-loosening fastener according to the present invention;

[0019] Figure 7 This utility model relates to an anti-loosening fastener. Figure 2 A magnified view of point A in the middle.

[0020] In the diagram: 1. Mounting hole; 2. Locking screw; 3. Nut; 4. Anti-loosening mechanism; 41. Fixed ring; 42. Moving ring; 43. Connecting ring; 44. Slot; 45. Slot tooth; 5. Spring; 6. Rubber ring; 7. Anti-slip groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-7 This utility model provides a technical solution: an anti-loosening fastener, including a mounting hole 1, a locking screw 2 that is screwed into the mounting hole 1 via a thread, a nut 3 integrally formed on the upper end of the locking screw 2, and an anti-loosening mechanism 4 assembled between the locking screw 2 and the mounting hole 1. The anti-loosening mechanism 4 includes a fixed ring 41, a movable ring 42, a connecting ring 43, a groove 44, and a tooth 45. The fixed ring 41 is fixed to the outside of the mounting hole 1 by welding. The movable ring 42 is movably sleeved on the outside of the nut 3. The lower end of the movable ring 42 is welded with a connecting ring 43. Six grooves 44 are evenly opened on the outer surface of the fixed ring 41. Six teeth 45 are correspondingly fixed on the lower outer surface of the connecting ring 43. The cross-sections of the grooves 44 and the teeth 45 are trapezoidal, and their trapezoidal slopes can fit precisely.

[0023] A spring 5 is fitted around the lower end of the movable ring 42 on the outer side of the locking screw 2. The lower end of the spring 5 is welded and fixed to the outer wall of the locking screw 2, and the upper end of the spring 5 is welded and fixed to the lower end face of the movable ring 42. In its natural state, the spring 5 can push the movable ring 42 to maintain an upward trend, thereby allowing the retaining tooth 45 to stably engage with the retaining groove 44. A rubber ring 6 is fitted and bonded to the outer side of the nut 3. The outer side of the rubber ring 6 is tightly fitted to the inner side of the movable ring 42. Four strip-shaped anti-slip grooves 7 are evenly distributed on the outer surface of the movable ring 42.

[0024] The assembly process in this embodiment is as follows: First, the fixing ring 41 is fixed in the preset position of the mounting hole 1 by welding. Then, the spring 5 is sleeved on the locking screw 2, and the movable ring 42 is sleeved on the outside of the nut 3, ensuring that the upper and lower ends of the spring 5 are connected and fixed to the locking screw 2 and the movable ring 42 respectively. At this time, the rubber ring 6 is in close contact with the inner side of the movable ring 42. Next, the locking screw 2 is aligned with the mounting hole 1 and tightened clockwise. During the tightening process, the retaining tooth 45 rotates to the left with the locking screw 2. The trapezoidal inclined surface of the retaining tooth 45 and the trapezoidal inclined surface of the retaining groove 44 press against each other, generating an upward force to push the movable ring 42 upward. The spring 5 is compressed. This process does not hinder the tightening operation of the locking screw 2. When the locking screw 2 is fully tightened, the elastic restoring force of the spring 5 drives the movable ring 42 and the connecting ring 43 downward, so that the retaining tooth 45 accurately engages in the retaining groove 44, completing the assembly.

[0025] When the equipment vibrates during operation, and the locking screw 2 shows signs of loosening and attempts to turn counterclockwise, the retaining tooth 45 will rotate to the right along with the locking screw 2. At this time, the retaining tooth and the trapezoidal vertical surface of the retaining groove abut against each other, forming a rigid barrier that effectively prevents the locking screw 2 from reversing and loosening. At the same time, the rubber ring 6 increases the friction between the nut 3 and the movable ring 42. This friction can dissipate the kinetic energy generated by vibration, preventing the movable ring 42 from moving up and down frequently due to vibration, and ensuring a stable engagement between the retaining tooth 45 and the retaining groove 44.

[0026] When disassembly is required, workers can use the anti-slip groove 7 to pull the movable ring 42 upward with their fingers or tools. The movable ring 42 drives the connecting ring 43 and the retaining tooth 45 to move upward, and the spring is compressed again until the retaining tooth 45 is completely misaligned with the retaining groove 44. At this point, the locking screw 2 can be easily loosened and removed. The entire disassembly process is simple and without damage.

[0027] The fixed ring of this structure is fixed to the outside of the mounting hole in advance by welding or pre-embedding; the movable ring of this device is directly sleeved on the outer surface of the nut, and the movable ring can only move up and down along the nut, but cannot rotate relative to it.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-loosening fastener, comprising a mounting hole (1), characterized in that: A locking screw (2) is screwed into the mounting hole (1) and a nut (3) is fixedly installed on the upper end of the locking screw (2). An anti-loosening mechanism (4) is provided between the locking screw (2) and the mounting hole (1). The anti-loosening mechanism (4) includes a fixed ring (41), a movable ring (42), a connecting ring (43), a groove (44), and a tooth (45). A fixed ring (41) is fixedly installed on the outside of the mounting hole (1). A movable ring (42) is movably fitted on the outer surface of the nut (3). A connecting ring (43) is fixedly installed at the lower end of the movable ring (42). Several grooves (44) are evenly opened on the outer surface of the fixed ring (41). Several teeth (45) are evenly fixed on the outer surface of the lower end of the connecting ring (43).

2. The anti-loosening fastener according to claim 1, characterized in that: The cross-sections of the slot (44) and the tooth (45) are trapezoidal.

3. The anti-loosening fastener according to claim 1, characterized in that: A spring (5) is fitted on the outer surface of the locking screw (2) at the lower end of the movable ring (42). The lower end of the spring (5) is fixedly connected to the locking screw (2), and the upper end of the spring (5) is fixedly connected to the movable ring (42).

4. The anti-loosening fastener according to claim 1, characterized in that: A rubber ring (6) is fixedly provided on the outer surface of the nut (3), and the outer surface of the rubber ring (6) is in contact with the outer surface of the movable ring (42).

5. The anti-loosening fastener according to claim 1, characterized in that: The outer surface of the movable ring (42) is provided with anti-slip grooves (7).

6. The anti-loosening fastener according to claim 1, characterized in that: Multiple slots (44) and teeth (45) are provided and are evenly distributed on the outer surfaces of the fixing ring (41) and the connecting ring (43).

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