CN211778449U

CN211778449U - Anti-loosening structure and screw assembly

Info

Publication number: CN211778449U
Application number: CN202020345314.6U
Authority: CN
Inventors: 蒋易岑; 蒋建伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-27
Anticipated expiration: 2030-03-18

Abstract

The anti-loosening structure comprises a ratchet wheel connected below a nut and a stop ring sleeved on the screw, wherein a hole in the middle of the ratchet wheel is right opposite to a threaded hole of the nut and can be penetrated by the screw, a plurality of stop pins are vertically inserted in the stop ring, a rotatable rotating shaft is also vertically fixed on the stop ring close to the edge of the stop ring, a pawl matched with the ratchet wheel is installed on the rotating shaft, and an elastic piece for resetting the rotating shaft after rotation is installed between the rotating shaft and the stop ring; the ratchet wheel is placed on the stop ring, the pawl is inserted between tooth grooves of the ratchet wheel, the ratchet wheel is rotated in the forward direction, the pawl slides on tooth backs of the ratchet wheel, the ratchet wheel is rotated in the reverse direction, the ratchet wheel and the pawl are clamped mutually, the ratchet wheel cannot rotate reversely, the pawl can be pulled outwards to withdraw from the tooth grooves of the ratchet wheel, and the ratchet wheel can rotate reversely on the stop ring. The utility model provides a locking moving structure simple structure, locking not hard up performance are good.

Description

Anti-loosening structure and screw assembly

Technical Field

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

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

The utility model aims at providing a simple structure, locking not hard up good locking performance's locking structure and have this locking screw assembly who moves structure.

In order to solve the technical problem, the utility model discloses a following technical scheme: a loosening prevention structure comprises a ratchet wheel and a stop ring, wherein a hole for a screw to pass through is formed in the middle of the ratchet wheel, a plurality of stop pins are vertically inserted into the stop ring, a rotatable rotating shaft is vertically fixed on the stop ring close to the edge of the stop ring, a pawl matched with the ratchet wheel is installed on the rotating shaft, and an elastic piece for resetting the rotating shaft after rotation is installed between the rotating shaft and the stop ring; the ratchet wheel is placed on the stop ring, the pawl is inserted between tooth grooves of the ratchet wheel, the ratchet wheel is rotated in the forward direction, the pawl slides on tooth backs of the ratchet wheel and rotates in the reverse direction, the ratchet wheel and the pawl are clamped mutually, the ratchet wheel cannot rotate in the reverse direction, the pawl is pulled outwards to withdraw from the tooth grooves of the ratchet wheel, and the ratchet wheel can rotate in the reverse direction on the stop ring.

Further, the elastic member is a torsion spring.

Still further, the quantity of stop pin is three, and this three stop pins evenly distributed is on the snap ring.

As the utility model discloses an in addition, a screw subassembly, including screw and nut, still include aforementioned locking structure that moves, ratchet in the locking structure that moves is connected in the below of nut, the hole in the middle of the ratchet is just to the screw hole of nut, the check ring suit in the locking structure that moves is on the screw, and rotatory nut can drive the ratchet rotatory, and perhaps rotatory ratchet can drive the nut rotatory.

Further, the ratchet wheel is fixed with the nut in a welding mode.

Or a nut groove is formed downwards from the top of the ratchet wheel, the depth of the nut groove is 1/3-1/2 of the thickness of the nut, and the ratchet wheel is in clearance fit with the nut through the nut groove.

The utility model provides a locking structure that moves's simple structure, application scope are wide, and its size can be customized according to the size of screw and nut on the market, consequently, the screw and the nut of different specifications on the market can both have the locking structure that moves of corresponding specification and use with it. When the screw component provided by the utility model is connected with a workpiece, firstly the screw is inserted into the workpiece, then the stop ring is sleeved on the screw, and the stop pin on the stop ring is inserted into the pin hole which is arranged in advance on the workpiece, finally the nut and the ratchet wheel which are connected into a whole are screwed on the screw together, when the nut is screwed in place, the pawl on the stop ring is meshed with the teeth on the ratchet wheel, under the state, the nut (or the ratchet wheel) is rotated in the forward direction, the pawl slides over the back of the teeth of the ratchet wheel, and the nut (or the ratchet wheel) can not be reversed due to the mutual clamping between the pawl and the ratchet wheel, therefore, after the screw component is connected with the workpiece, the connection between the workpieces is very firm, even if the workpiece is in the environments of vibration or strong movement, and the like, the pawl can effectively prevent the ratchet wheel from reversing, so the nut and the screw can not be reversely rotated basically, that is, the screw can not be loosened. Obviously, the utility model provides a screw subassembly has fine locking performance of moving.

Drawings

FIG. 1 is a schematic view showing the overall structure of a screw assembly according to embodiment 1;

FIG. 2 is a schematic view showing the overall structure of a screw assembly according to embodiment 2;

fig. 3 is a schematic view of a use state of the screw assembly in embodiment 1 or embodiment 2.

The reference signs are:

a-1 workpiece and B-2 workpiece

1-screw 2-nut 3-ratchet wheel

4-stop ring 5-stop pin 6-rotating shaft

7-pawl

2 a-screw hole

3 a-hole 3 b-nut groove.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and 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 therefore, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

Example 1

As shown in fig. 1, a screw assembly, including screw 1 and nut 2, still include the anti-loosening structure, the anti-loosening structure includes ratchet 3 and the suit check ring 4 on screw 1 of welding in nut 2 below, and porose 3a is seted up in the centre of ratchet 3, and this hole 3a is just to screw hole 2a of nut 2 and can supply screw 1 to pass, and screw 1 can be in proper order in ratchet 3 and nut 2 through hole 3a and screw hole 2a, vertically insert on the check ring 4 and be equipped with many stop pins 5 the utility model discloses in, set up the aim at of stop pin 5: when a certain workpiece needs to be fastened by using a screw assembly, the stop ring 4 is sleeved on the screw 1, the stop pin 5 needs to be inserted into the stop ring 4 and also needs to be inserted into the workpiece to be fastened (a pin hole matched with the stop pin 5 should be formed in the workpiece), so that the stop ring 4 and the workpiece to be fastened can be effectively prevented from rotating relatively, the number of the stop pins 5 is not limited, but preferably three, the three stop pins 5 are preferably uniformly distributed on the stop ring 4, a rotatable rotating shaft 6 is vertically fixed on the stop ring 4 close to the edge of the stop ring and is vertically fixed on the stop ring, a pawl 7 matched with the ratchet wheel 3 is installed on the rotating shaft 6, and the pawl 7 can have various shapes, for example: as shown in fig. 1 to 3, the pawl 7 has a hook-shaped configuration, the end of which is inserted between the tooth grooves of the ratchet 3, and the pawl 7 of the present invention is designed to prevent the ratchet 3 from rotating reversely with respect to the stopper ring 4, in order to ensure that the pawl 7 does not obstruct the movement of the ratchet wheel 3 when the ratchet wheel 3 rotates in the forward direction on the stop ring 4, the pawl 7 should be able to smoothly slide on the back of the teeth of the ratchet wheel 3 when the ratchet wheel 3 rotates in the forward direction, i.e. the pawl 7 can rotate, in the utility model, the pawl 7 is arranged on the rotating shaft 6, the pawl 7 and the rotating shaft 6 are synchronous when rotating, in order to reset the pawl 7 after rotating, an elastic element for resetting the rotating shaft 6 after rotating can be arranged between the rotating shaft 6 and the stop ring 4, in the prior art, the types of elastic members capable of achieving the reset effect are many, and most commonly, the elastic members should be torsion springs, and in this embodiment, the torsion springs can be used for controlling the rotating shaft 6 and the pawl 7 to reset.

When two workpieces (hereinafter, workpiece No. 1 and workpiece No. 2 are exemplified) are fastened together by using the screw assembly in the above embodiment, as shown in fig. 3, the screw 1 is inserted into the workpiece No. 2 and the workpiece No. 1 in sequence, then the stop ring 4 is sleeved on the screw 1, the stop pin 5 on the stop ring 4 is inserted into the pin hole formed in advance in the workpiece No. 1, finally the nut 2 and the ratchet 3 connected integrally are screwed on the screw 1 by using a wrench, when the nut 2 is screwed in place, the pawl 7 on the stop ring 4 is meshed with the teeth on the ratchet 3, the nut 2 is rotated forward by using the wrench in a state that the pawl 7 is meshed with the teeth on the ratchet 3, the ratchet 3 is rotated forward, the pawl 6 slides over the back of the teeth of the ratchet 3, and the nut 2 is rotated backward, the ratchet 3 also has a tendency of rotating in a direction, but the pawl 6 and the ratchet 3 are clamped with each other, the ratchet wheel 3 cannot rotate reversely, namely the nut 2 cannot be rotated reversely by using a wrench, so that after the fastening is carried out in the manner, the connection between the No. 1 workpiece A and the No. 2 workpiece B is very firm, even if the No. 1 workpiece A and the No. 2 workpiece B are in vibration or strong motion and other environments, the ratchet wheel 3 can be effectively prevented from rotating reversely by the pawl 7, so that the nut 2 and the screw 1 cannot rotate reversely basically, namely the screw 1 cannot be loosened. Obviously, the screw assembly in this embodiment has good anti-loosening performance.

Screw assembly among the above-mentioned embodiment is behind the fastening work piece, because pawl 7 is with ratchet 3 reverse locking, consequently when this screw assembly is dismantled to needs, must withdraw from ratchet 3 with pawl 7 earlier, and can know from the aforesaid, pawl 7 can rotate, consequently can make it withdraw from between ratchet 3's tooth's socket through stirring pawl 7 outwards to relieve pawl 7 and to ratchet 3's reverse locking, and then with ratchet 3 and nut 2 along with reverse back-screwing out from screw 1, the utility model discloses a this kind of screw assembly dismantlement method obviously is more convenient, swift.

Example 2

A screw assembly, as shown in fig. 2, the difference between the present embodiment 2 and the embodiment 1 is: the connection relationship between the ratchet wheel 3 and the nut 2, specifically, in this embodiment 2, a nut groove 3c is formed downward from the top of the ratchet wheel 3, the depth of the nut groove 3c is 1/3-1/2 of the thickness of the nut 2, the ratchet wheel 3 is in clearance fit with the nut 2 through the nut groove 3c, and the ratchet wheel 3 can be driven to rotate together when the nut 2 is rotated by using a wrench. In practical application, whether the screw assembly of embodiment 1 or the screw assembly of embodiment 2 is adopted, the screw assemblies of both structures are simple and convenient in production and use, but relatively speaking, the anti-loosening structure of embodiment 2 is more convenient in combination with commercially available screws and nuts, because after the ratchet 3 and the stop ring 4 matched with the specifications of the commercially available screws and nuts are added, the ratchet 3 and the nut are assembled together by welding in embodiment 1, and the nut is directly pressed into the nut groove 3b of the ratchet 3 in embodiment 2, so that the assembly process is simpler and more convenient.

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 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. Locking structure that moves, its characterized in that: the novel ratchet wheel structure comprises a ratchet wheel (3) and a stop ring (4), wherein a hole (3 a) for a screw (1) to pass through is formed in the middle of the ratchet wheel (3), a plurality of stop pins (5) are vertically inserted into the stop ring (4), a rotatable rotating shaft (6) is vertically fixed on the stop ring (4) close to the edge of the stop ring, a pawl (7) matched with the ratchet wheel (3) is installed on the rotating shaft (6), and an elastic piece for enabling the rotated rotating shaft (6) to reset is installed between the rotating shaft (6) and the stop ring (4); the ratchet wheel (3) is placed on the stop ring (4), the pawl (7) is inserted between tooth grooves of the ratchet wheel (3), the ratchet wheel (3) is rotated in the forward direction, the pawl (7) slides on the tooth back of the ratchet wheel (3) and rotates the ratchet wheel (3) in the reverse direction, the ratchet wheel (3) and the pawl (7) are clamped with each other, the ratchet wheel (3) cannot rotate in the reverse direction, the pawl (7) is pulled outwards to withdraw from the tooth grooves of the ratchet wheel (3), and then the ratchet wheel (3) can rotate in the reverse direction on the stop ring (4).

2. The anti-loosening structure according to claim 1, wherein: the elastic piece is a torsion spring.

3. The anti-loosening structure according to claim 2, wherein: the number of the stop pins (5) is three, and the three stop pins (5) are uniformly distributed on the stop ring (4).

4. A screw assembly comprising a screw (1) and a nut (2), characterized in that: the anti-loosening structure comprises a ratchet wheel (3) connected below a nut (2), a hole (3 a) in the middle of the ratchet wheel (3) is opposite to a threaded hole (2 a) of the nut (2), a stop ring (4) in the anti-loosening structure is sleeved on the screw (1), the ratchet wheel (3) can be driven to rotate by rotating the nut (2), or the nut (2) can be driven to rotate by rotating the ratchet wheel (3).

5. The screw assembly of claim 4, wherein: the ratchet wheel (3) is fixed with the nut (2) in a welding mode.

6. The screw assembly of claim 4, wherein: a nut groove (3 b) is formed downwards from the top of the ratchet wheel (3), the depth of the nut groove (3 b) is 1/3-1/2 of the thickness of the nut (2), and the ratchet wheel (3) is in clearance fit with the nut (2) through the nut groove (3 b).