CN212360457U

CN212360457U - Anti-loosening screw fastener

Info

Publication number: CN212360457U
Application number: CN202021085118.6U
Authority: CN
Inventors: 蒋建伟; 蒋易岑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-01-15
Anticipated expiration: 2030-06-12

Abstract

The utility model provides an anti-loosening screw fastener, relates to fastener technical field, and its state ratchet groove is located the middle part of screw and its both ends extend towards the both ends direction of screw, the length of ratchet groove is less than the length of screw, the one end of nut articulates there is the pawl, the one end of pawl can block in arbitrary ratchet groove and restrict the nut can only take place unidirectional rotation relatively the screw. The utility model discloses simple structure, locking not hard up performance is better.

Description

Anti-loosening screw fastener

Technical Field

The utility model belongs to the technical field of the fastener technique and specifically relates to indicate an anti-loosening screw fastener.

Background

The bolt and the nut are the most common fasteners and are generally applied to various fields, the bolt and the nut are connected by threads, and the self-locking capacity between the bolt and the nut comes from the matching of internal threads and external threads.

In a relatively stable place, the matching between the bolt and the nut is relatively fixed, and the loosening condition cannot easily occur, but in some special use environments, such as the use in a vibration environment, the use in a strong motion environment, the use in equipment with high assembly requirements and the use in other special environments, the self-locking capability after the bolt is in threaded connection is not enough to maintain the stability of the bolt, in life, more common in large vehicles, bolts are needed to be used for connecting and fixing among a plurality of parts on the vehicles (because the application positions are relatively fixed, the specifications of the bolts are uniform, so the bolt fasteners can be produced in batches), the shaking ground can cause the shaking of the vehicle body during the driving process of the large vehicles, in a long term, the loosening condition can occur in the connection between the bolt and the nut, and the loosening of the fasteners can directly influence the normal work of the relevant parts of the vehicles, thereby easily causing malfunction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-looseness screw fastener, its simple structure, anti-looseness performance is better.

In order to solve the technical problem, the utility model discloses a following technical scheme: a locking screw fastener comprises a screw and a nut, wherein a plurality of ratchet grooves are uniformly arranged on the side surface of the screw in an annular and spaced mode, the ratchet grooves are located in the middle of the screw, two ends of each ratchet groove extend towards two ends of the screw, the length of each ratchet groove is smaller than that of the screw, one end of the nut is hinged to a pawl, one end of the pawl can be clamped into any one ratchet groove, and the nut is limited to rotate only in a single direction relative to the screw.

Or, the screw fastener that locking is become flexible, includes screw and nut, its characterized in that: the side surface of the nut is hinged with a pawl, a plurality of ratchet grooves are uniformly distributed on the upper edge of the nut along the outer edge of the workpiece surface against which the nut abuts, one end of the pawl can be clamped into any one of the ratchet grooves, and the nut is limited to rotate relative to the screw in a single phase.

Preferably, one end of the pawl is in a barb-shaped structure.

More preferably, the pawl is hinged to the nut by a pin.

More preferably, a torsion spring is further connected between the pawl and the pin shaft, and one end of the pawl can abut against the screw under the torsion action of the torsion spring.

More preferably, the number of the pawls is two or more.

The utility model discloses a theory of operation is: through connecting the work piece of treating the fastening with screw and nut, can be after the two is screwed up, beat into one of them ratchet groove with the pawl, then loosen the nut slightly, make the minimum angle of nut antiport, can make the one end of pawl tightly support and lean on the internal face of holding the ratchet groove, the cooperation is accomplished with the ratchet groove to the pawl this moment, because of the two is similar with ratchet pawl cooperation principle, further relative rotation has just can't take place to the orientation of becoming flexible again to consequently the nut, thereby effectively realized the effect of locking, moreover, the steam generator is simple in structure, the locking effect is better.

Drawings

Fig. 1 is an exploded view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic view of a structure in joining two workpieces in example 1;

fig. 3 is a schematic view of the overall structure of the embodiment 2 of the present invention when two workpieces are connected.

The reference signs are:

1-screw 2-nut 3-ratchet groove

4-pawl 5-pin shaft.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1-2, a locking screw fastener includes a screw 1 and a nut 2, a plurality of ratchet grooves 3 are uniformly formed in a side surface of the screw 1 at intervals in an annular shape, the ratchet grooves 3 are located in a middle portion of the screw 1, and both ends of each ratchet groove 3 extend toward both ends of the screw 1, a length of each ratchet groove 3 is smaller than a length of the screw 1, one end of the nut 2 is hinged to a pawl 4, and one end of each pawl 4 can be clamped into any one of the ratchet grooves 3 and limit the nut 2 to rotate only in a single direction relative to the screw 1.

When the anti-loosening screw fastener provided by the embodiment is used, one end of the screw 1 penetrates through the workpiece A and the workpiece B, then the nut 2 is screwed in from one end of the screw 1 until the head of the screw 1 and the nut 2 are respectively abutted against the workpiece A and the workpiece B, at the moment, the pawl 4 can be knocked into one ratchet groove 3, then the nut 2 is slightly loosened, the nut 2 is reversely rotated by a small angle, the pawl 4 can be driven to move, one end of the pawl 4 is tightly abutted against the inner wall surface of the ratchet groove 3, at the moment, the nut 2 cannot further rotate relatively in the loosening direction, and therefore the effect of preventing the screw fastener from loosening is effectively achieved.

When the nut is disassembled, the nut 2 is further rotated towards the screwing direction to rotate by a small angle, so that the pawl 4 can be driven to move, one end of the pawl 4 is gradually separated from the inner wall surface of the ratchet groove 3, then the pawl 4 can be rotated to enable the pawl 4 to withdraw from the ratchet groove 3, the locking effect of the pawl and the ratchet groove is relieved, and the nut can be disassembled to complete the disassembly of the workpiece.

It should be noted that, as will be appreciated by those skilled in the art, in the above-described embodiment, a plurality of ratchet grooves 3 are annularly arranged on the screw 1, and the interval between adjacent ratchet grooves 3 is very small, so that when the pawl 4 is struck, there is no fear that the pawl 4 cannot be engaged with the ratchet groove 3 therein at all because the number of ratchet grooves 3 is sufficiently large. In addition, since the length of the ratchet groove 3 is smaller than that of the screw 1, the screw 1 still has a thread having a connecting function.

Preferably, one end of the pawl 4 is in a barb-shaped structure, and the locking effect is better.

More preferably, the pawl 4 is hinged to one end of the nut 2 by a pin 5, wherein a torsion spring (not shown in the drawings) is further connected between the pawl 4 and the pin 5, one end of the pawl 4 can abut against the screw 1 under the torsion action of the torsion spring, and one end of the pawl 4 firmly abuts against the ratchet groove 3 by the torsion action of the torsion spring, so that the firmness of the fastener can be effectively improved.

Example 2

As shown in fig. 3, the anti-loosening screw fastener comprises a screw 1 and a nut 2, wherein a pawl 4 is hinged to the side surface of the nut 2, a plurality of ratchet grooves 3 are uniformly distributed along the outer edge of the nut 2 on the workpiece surface abutted by the nut 2, one end of the pawl 4 can be clamped into any one of the ratchet grooves 3, and the nut 2 is limited to rotate relative to the screw 1 in a single phase.

Similarly, in this embodiment, the pawl 4 is hinged to the side surface of the nut 2 by a pin 5, wherein a torsion spring (not shown in the drawings) is further connected between the pawl 4 and the pin 5, and under the torsion action of the torsion spring, one end of the pawl 4 can abut against the top surface of the workpiece B, and one end of the pawl 4 is firmly abutted against the ratchet groove 3 by the torsion action of the torsion spring, so that the firmness of the fastener can be effectively improved.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In addition, in the present embodiment, the number of the pawls 4 is two or more, which can further ensure the stability of the fastener.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims

1. A locking screw fastener that moves, includes screw (1) and nut (2), its characterized in that: the novel nut is characterized in that a plurality of ratchet grooves (3) are formed in the side face of the screw (1) at uniform intervals in an annular mode, the ratchet grooves (3) are located in the middle of the screw (1), two ends of the ratchet grooves extend towards two ends of the screw (1), the length of each ratchet groove (3) is smaller than that of the screw (1), one end of the nut (2) is hinged to a pawl (4), one end of each pawl (4) can be clamped into any one ratchet groove (3) and limits the nut (2) to rotate only in a single direction relative to the screw (1).

2. A locking screw fastener that moves, includes screw (1) and nut (2), its characterized in that: the side surface of the nut (2) is hinged with a pawl (4), a plurality of ratchet grooves (3) are uniformly distributed on the workpiece surface abutted by the nut (2) along the outer edge of the nut (2), one end of the pawl (4) can be clamped into any one ratchet groove (3) and limits the nut (2) to only rotate relative to the screw (1) in a single-phase mode.

3. The anti-loosening screw fastener according to claim 1 or 2, wherein: one end of the pawl (4) is of a barb-shaped structure.

4. The anti-loosening screw fastener according to claim 3, wherein: the pawl (4) is hinged with the nut (2) through a pin shaft (5).

5. The anti-loosening screw fastener according to claim 4, wherein: and a torsion spring is further connected between the pawl (4) and the pin shaft (5), and one end of the pawl (4) can be abutted against the screw (1) under the torsion action of the torsion spring.

6. The anti-loosening screw fastener according to claim 5, wherein: the number of the pawls (4) is two or more.