TW202030422A - Anti-loose retreat-stopping screw locking structure - Google Patents

Abstract

The invention is an anti-loose retreat-stopping screw locking structure, which comprises a bolt, a nut and a fastener, wherein the bolt has an external thread, the external thread has at least one rotary cross-sectional groove, and the at least one rotary cross-sectional groove is arranged to rotate along the axial direction of the bolt opposite to the direction of the external thread, and the at least one rotary cross-sectional groove crosses the external thread, and the nut has a plurality of grooves, when the nut is screwed to lock on the external thread, one of the at least one rotary cross-sectional groove and one of the rotary cross-sectional grooves will have an overlapping area with one of the plurality of grooves, and the fastener has a buckle end, and the fastener is buckled on the nut. In addition, the buckle end penetrates the slot and extends into the rotary cross-sectional groove. Accordingly, the relative position of the bolt and the nut can be fixed through the fastener, thereby avoiding the problem of loose displacement of the nut.

Description

Anti-loosening and anti-return screw lock structure

The present invention relates to a screw lock structure, in particular to an anti-loosing and anti-return screw lock structure.

The locking of bolts and nuts is a commonly used structure for machine parts assembly and fixation, which is widely used in various processing machines, home appliances, wheel frame assembly, etc., bolts and nuts use mutually matched thread structures to clamp different parts , To achieve the purpose of locking between different parts. The conventionally encountered problem is that after long-term use in a vibrating environment, the nut will loosen and cause the problem of insufficient clamping force.

In order to solve this problem, a variety of non-returning nuts and non-returning washers are used to prevent the nut from loosening. Such as the Taiwan Announcement No. I518255 Patent "Screw Assembly for Preventing Loosening", the disclosure can be A straight groove is set on the thread of the bolt, so that the elastic member fixed in the nut is clamped into the groove, and the elastic member is fixed to the groove, so that the bolt and the nut are immovable, which can prevent the nut from loosening .

However, the elastic member of the nut of this structure is a built-in structure, and once it is damaged or improperly installed, it cannot be observed from the outside, and there is often a problem of failure to prevent the nut from loosening. In addition, it has the effect of stopping retreat only when the elastic member is stuck in the pocket. Therefore, the relative position of the nut relative to the bolt (that is, the rotation angle of the nut) is restricted, and the angle of the nut can not be adjusted steplessly. That is, it cannot meet the needs of fine adjustment of the clamping force of the screw lock.

The purpose of the present invention is to disclose an anti-loosening and anti-return screw lock structure that can finely adjust the clamping force of the screw lock.

Based on the above objective, the present invention is an anti-loosening and anti-return screw lock structure, which comprises a bolt, a nut and a fastener, wherein the bolt has an external thread, and the external thread has at least one rotary groove. At least one rotary groove is arranged along the axial direction of the bolt and is arranged to rotate against the direction of the external thread, and the at least one rotary groove crosses the external thread; and the nut has a plurality of grooves, and when the screw When the cap screw is locked on the external thread, one of the at least one rotary groove and one of the plurality of grooves will have an overlapping area; the fastener has a buckle end, and the fastener is buckled on the On the nut, and the buckle end passes through the slot and extends into the rotary section groove.

Accordingly, the present invention is mainly based on the arrangement of the at least one rotary section groove and the plurality of grooves, when the nut is screwed on the bolt, no matter where the nut is relative to the bolt, there will be The rotary slit is aligned with the slit, so that the fastener can be used to buckle the nut, and the buckle end can pass through the slit to extend into the rotary slit, and the buckle end can simultaneously The relative position of the nut and the bolt can be fixed by passing through the slot and the rotary section groove, thereby preventing the nut from loosening, which forms an explicit anti-loosening and anti-return structure, which can be easily judged. Whether the loosening and retreating structure is damaged, and the present invention can allow the nut to finely adjust the angle and directly fix it, which can meet the requirement of finely adjusting the clamping force of the screw lock.

With regard to the detailed content and technical description of the present invention, examples are now used for further description, but it should be understood that these examples are for illustrative purposes only and should not be construed as limiting the implementation of the present invention.

Please refer to "Figure 1" ~ "Figure 5", which are the component structure, assembly and cross-sectional view of the present invention. As shown in the figure, this case is an anti-loosening and anti-return screw lock structure, which includes a bolt 10, a The nut 20 and a fastener 30, wherein the bolt 10 has an external thread 11, the direction of the external thread 11 can be a common clockwise direction, and the external thread 11 has at least one rotary groove 12, the at least one The rotary groove 12 is arranged to rotate along the axial direction of the bolt 10 opposite to the direction of the external thread 11, and the at least one rotary groove 12 spans the external thread 11, that is, the at least one rotary groove 12 The direction is counterclockwise.

The nut 20 has a plurality of slots 21, and when the nut 20 is screw-locked on the external thread 11, one of the at least one rotary slit 12 will overlap with one of the plurality of slots 21 The number of the plurality of grooves 21 is not particularly limited, preferably six, and are evenly distributed on the annular surface of the nut 20. When the number of the plurality of grooves 21 is greater, the rotating section The probability that the groove 12 will overlap the groove 21 will increase. And in practice, when the nut 20 is to be rotated, the rotary groove 12 and the slot 21 overlap at any time, and the curvature and groove width of the rotary groove 12 when surrounding the bolt 10 can be increased. The number and width of the grooves 21 can be increased, and by adjusting the above parameters (curvature and groove width), it is ensured that the rotary section groove 12 and the groove 21 overlap at any time. In addition, for manufacturing considerations, the plurality of slots 21 may be adjacent to one end 201 of the nut 20 to reduce manufacturing difficulty.

The fastener 30 has a buckle end 31, the fastener 30 can be a G shape, the fastener 30 is buckled on the nut 20, and because the rotary groove 12 and the slot 21 overlap Area, so the buckle end 31 can extend through the slot 21 into the rotary groove 12, so as to pass through the buckle end 31 through the groove 21 and the rotary groove 12 at the same time to fix the nut 20 and the relative angle of the bolt 10.

Please refer to "Figure 6", which is a plan structural view of another bolt 10A. As shown in the figure, it has two rotary grooves 12, 12A, and the two rotary grooves 12, 12A are equally divided in position Set on the external thread 11, under this design, the curvature and groove width of the rotary section grooves 12, 12A are not excessively increased, and the number and width of the grooves 21 are not excessively increased. There is an overlapping area between the rotary section grooves 12, 12A and the slot 21 at any time, so that the buckle end 31 of the fastener 30 (as shown in FIG. 3) can be inserted, which can maintain the nut 20 and the bolt 10 The structural strength meets the needs of use.

As mentioned above, the advantages of the present invention include at least:

1. The fastener has an explicit structure. Once it is broken or deformed and damaged, it can be known that the nut has been loosened, and it can be replaced at the first time to ensure safety.

2. The rotary section groove and the slot have an overlapping area at any time. The user can fine-tune the clamping force of the nut and the bolt, and use the fastener to fix it to meet the needs of use.

However, the above are only preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention are all covered by the scope of the present invention patent.

10.10A: Bolt 11: External thread 12, 12A: Rotating groove 20: Nut 201: side end 21: Slotting 30: fasteners 31: Snap end

Figure 1 is a three-dimensional structural diagram of the bolt of the present invention. Figure 2 is a three-dimensional structural diagram of the nut of the present invention. Figure 3 is a three-dimensional structural diagram of the fastener of the present invention. Figure 4 is a three-dimensional structure diagram of the assembly of the present invention. Figure 5 is a sectional view of the assembly of the present invention. Figure 6 is a plan view of another bolt of the present invention.

10: Bolt

11: External thread

12: Rotating groove

20: Nut

201: side end

21: Slotting

30: fasteners

31: Snap end

Claims (5)

An anti-loosening and anti-return screw lock structure, which comprises: A bolt having an external thread, the external thread has at least one rotary groove, the at least one rotary groove is arranged to rotate along the axial direction of the bolt opposite to the direction of the external thread, and the at least one rotary groove The groove straddles the external thread; A nut, the nut has a plurality of slots, and when the nut is screw-locked on the external thread, one of the at least one rotary groove will have an overlapping area with one of the plurality of slots; and A fastener, the fastener has a buckle end, the fastener is buckled on the nut, and the buckle end extends through the slot into the rotary slit. According to the anti-loosening and anti-return screw lock structure described in item 1 of the scope of the patent application, the at least one rotary groove is two, and the positions are equally divided on the external thread. According to the anti-loosening and anti-return screw lock structure described in item 1 of the scope of patent application, the plurality of grooves are six, and they are equally distributed on the annular surface of the nut. The anti-loosening and anti-return screw lock structure described in item 1 of the scope of patent application, wherein the fastener is G-shaped. The anti-loosening and anti-return screw lock structure described in item 1 of the scope of patent application, wherein the plurality of grooves are adjacent to one end of the nut.

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