CN111089109A

CN111089109A - Anti-loosening device

Info

Publication number: CN111089109A
Application number: CN202010018280.4A
Authority: CN
Inventors: 唐先慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-05-01

Abstract

The invention discloses a locking device, comprising: a first fastening component and a second fastening component, the second fastening component comprising: the fixing unit and a plurality of limiting blocks; the fixing unit is in concave-convex connection with the first fastening assembly, and the outer surfaces of the limiting blocks are in interference connection with the inner surface of the first fastening assembly. The fixing unit of the anti-loosening device is in concave-convex connection with the first fastening assembly, so that the difficulty of connection release between the fixing unit and the first fastening assembly is increased, and the connection stability is improved; the surface of a plurality of stoppers is connected with the internal surface interference of first fastening components for a plurality of stoppers are compressed, thereby make the stopper produce pressure to the connecting rod, have realized the locking of stopper to the connecting rod, thereby make being connected between first fastening components, fixed unit, a plurality of stoppers and the connecting rod more stable, be difficult for receiving the effort of external force and remove the connection, realize locking effect, thereby realize making firm connection between the part.

Description

Anti-loosening device

Technical Field

The invention relates to the field of mechanical connection, in particular to a locking device.

Background

In various fields such as industrial production, automobiles, aerospace, rail transit and the like, a large number of bolts and nuts are used in equipment to realize connection, but under the condition of high-strength impact load and alternating load, the problem of looseness prevention of bolt and nut connection is not solved effectively all the time.

At present, a plurality of methods for preventing loosening of bolt and nut connection are adopted, such as spring gasket loosening prevention, self-locking nut loosening prevention, elastic ring nut loosening prevention, groove nut and locking gasket loosening prevention, circular nut and locking gasket loosening prevention, adhesion loosening prevention and the like, but the effects are not ideal in practical use, and especially on the problems of loosening of bolt and nut connection of key parts of equipment such as a vibration motor, a vibration sieve, a vibration feeding device and the like, the problems of loosening of bolt and nut connection of feet of the vibration motor, loosening of bolt and nut connection of key structure parts of the vibration sieve and loosening of bolt and nut connection of feet of an eccentric motor of the vibration feeding device are often caused due to large vibration and large load. In daily production, bolt and nut connection needs to be fastened and replaced regularly, and serious equipment accidents can be caused if maintenance is not timely performed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the anti-loosening device which can realize stable threaded connection, has a good anti-loosening effect and can firmly connect components.

An anti-loosening device according to an embodiment of the present invention includes: a first fastening component and a second fastening component, the second fastening component comprising: the fixing unit and a plurality of limiting blocks; the limiting blocks are connected with the bottoms of the fixing units, the fixing units are in concave-convex connection with the first fastening assemblies, and the outer surfaces of the limiting blocks are in interference connection with the inner surfaces of the first fastening assemblies.

The anti-loosening device provided by the embodiment of the invention at least has the following beneficial effects: the fixing unit is in concave-convex connection with the first fastening assembly, so that the difficulty of connection release between the fixing unit and the first fastening assembly is increased, and the connection stability is improved; the surface of a plurality of stoppers is connected with first fastening components's internal surface interference for a plurality of stoppers are compressed, thereby make the stopper produce pressure to the connecting rod, and make the frictional force greatly increased between stopper and the connecting rod, realized the locking of stopper to the connecting rod, thereby make first fastening components, fixed unit, the connection between a plurality of stoppers and the connecting rod is more stable, be difficult for receiving the effort of external force and remove the connection, realize locking effect, thereby realize making firm connection between the part.

According to some embodiments of the invention, the fixing unit comprises: a first fixing member and a second fixing member; the inner surface of the first fixing piece is provided with a first thread, and the inner surface of the second fixing piece is provided with a second thread matched with the first thread; the bottom surface of the first fixing piece is connected with the top surface of the second fixing piece, and the bottom surface of the second fixing piece is connected with the top surfaces of the limiting blocks; the bottom surface of the first fixing piece is in concave-convex connection with the top surface of the first fastening assembly, and the outer surface of the second fixing piece is in fit connection with the inner surface of the first fastening assembly.

According to some embodiments of the invention, the inner surface of the limiting block is formed with a third thread matching with the second thread, and the first thread, the second thread and the third thread are sequentially connected in a matching manner.

According to some embodiments of the invention, the top surface of the first fastening assembly is recessed inwards to form a central hole for connecting the second fixing piece and the limiting blocks; the top surface of the first fastening component is provided with a plurality of convex blocks; the bottom of the first fixing piece is provided with a plurality of concave blocks matched with the plurality of convex blocks; the convex block is in concave-convex connection with the concave block.

According to some embodiments of the invention, the bump comprises: a first convex surface in the same direction of rotation as the first thread and a second convex surface opposite the direction of rotation of the first thread; the length of first convex surface is greater than the length of second convex surface, the top of first convex surface with the top of second convex surface is connected, relative height between the top of first convex surface and the bottom equals relative height between the top of second convex surface and the bottom.

According to some embodiments of the invention, the central bore comprises: a first connection face, a first tapered face and a second connection face; the first conical surface is respectively connected with the first connecting surface and the second connecting surface, the first connecting surface is connected with the outer surface of the second fixing piece in a matched mode, the first conical surface is connected with the upper portion of the outer surface of the limiting block in an interference mode, and the second connecting surface is connected with the lower portion of the outer surface of the limiting block in a matched mode.

According to some embodiments of the invention, a plurality of the limit blocks are uniformly arranged on the bottom surface of the second fixing piece at intervals, so that a spacing groove is formed between adjacent limit blocks.

According to some embodiments of the present invention, upper portions of outer surfaces of the limiting blocks extend to form second tapered surfaces, and lower portions of outer surfaces of the limiting blocks extend to form third connecting surfaces; the first conical surface is in interference connection with the second conical surface, and the second connecting surface is in fit connection with the third connecting surface.

According to some embodiments of the invention, the screw further comprises a threaded connection surface, wherein a fourth thread matched with the third thread is arranged on the threaded connection surface; the threaded connection surface is connected with the second connection surface, and the first thread, the second thread, the third thread and the fourth thread are sequentially connected in a matched manner.

According to some embodiments of the invention, the top surface of the first fixing member is provided with a plurality of fixing blocks for increasing friction.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a check assembly according to an embodiment of the present invention;

fig. 2 is a structural view of a loosening prevention device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a second fastening assembly according to an embodiment of the invention;

FIG. 4 is a cross-sectional view of a first fastening assembly according to an embodiment of the invention;

FIG. 5 is an enlarged view of portion A of the first fastening component according to an embodiment of the present invention;

FIG. 6 is a block diagram of a second fastening assembly according to an embodiment of the invention;

FIG. 7 is a block diagram of a first fastening assembly according to an embodiment of the present invention;

FIG. 8 is a block diagram of various types of nuts in accordance with an embodiment of the present invention;

FIG. 9 is a graph comparing the vibratory loosening performance of a Down's threaded fastener according to an embodiment of the present invention with a conventional threaded fastener;

FIG. 10 is a diagram illustrating an analysis of the force exerted on a bump by a concave bump according to an embodiment of the present invention.

Reference numerals:

the fastening device comprises a first fastening assembly 100, a central hole 110, a first connecting surface 111, a first tapered surface 112, a second connecting surface 113, a threaded connecting surface 114, a fourth thread 1141, a projection 120, a first convex surface 121, a second convex surface 122, a second fastening assembly 200, a fixing unit 210, a first fixing member 211, a first thread 2111, a concave block 2112, a fixing block 2113, a second fixing member 212, a second thread 2121, a limiting block 220, a third thread 221, a spacing groove 222, a second tapered surface 223, a third connecting surface 224 and a bolt 300.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, if there are first, second, third, fourth, fifth, etc. described, only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.

As shown in fig. 1 and 2, an anti-loose device according to an embodiment of the present invention includes: a first fastening component 100 and a second fastening component 200, the second fastening component 200 comprising: a fixing unit 210 and a plurality of stoppers 220; the plurality of limit blocks 220 are connected with the bottom of the fixing unit 210, the fixing unit 210 is in concave-convex connection with the first fastening component 100, and the outer surfaces of the plurality of limit blocks 220 are in interference connection with the inner surface of the first fastening component 100.

For example, as shown in fig. 1 and 2, the inner surface surrounded by the plurality of stoppers 220 is used to connect with a connecting rod, and the connecting rod passes through a component to be fixed and then connects with the plurality of stoppers 220 to fix the component.

The fixing unit 210 is in concave-convex connection with the first fastening assembly 100, so that the difficulty of connection release between the fixing unit 210 and the first fastening assembly 100 is increased, and the connection stability is improved; the surface of a plurality of stopper 220 is connected with the internal surface interference of first fastening components 100, make a plurality of stopper 220 compressed, take place elastic deformation, namely, make the distance between the stopper 220 lower part that makes adjacent shorten, thereby make stopper 220 produce the extrusion force to the connecting rod, and make the frictional force greatly increased between stopper 220 and the connecting rod, the realization is to the locking of connecting rod, thereby make first fastening components 100, fixed unit 210, the connection between a plurality of stopper 220 and the connecting rod is more stable, be difficult for receiving the effort of external force and remove the connection, realize locking effect, thereby realize making firm connection between the part.

Further, the fixing unit 210 may be concavo-convex connected with the first fastening assembly 100 in such a manner that: the fixing unit 210 is provided with a protruding part, the first fastening assembly 100 is provided with a recessed position, and the protruding part is connected with the recessed position in a matching way when the interference connection between the plurality of limit blocks 220 and the first fastening assembly 100 is completed; or, a first gear surface is arranged on the fixing unit 210, a corresponding second gear surface is arranged on the first fastening assembly 100, and when the interference connection between the plurality of limiting blocks 220 and the first fastening assembly 100 is completed, the first gear surface is engaged with the second gear surface.

Further, the thickness of the upper portions of the plurality of limit blocks 220 may be set to be smaller than the thickness of the lower portions, so that the thinner portions of the upper portions of the plurality of limit blocks 220 are connected to the bottom of the fixing unit 210, and thus the plurality of limit blocks 220 are easily elastically deformed under the action of the first fastening assembly 100, thereby preventing the damage and fracture of the limit blocks 220.

In some embodiments of the present invention, the fixing unit 210 includes: a first fixing member 211 and a second fixing member 212; the inner surface of the first fixing member 211 is provided with first threads 2111, and the inner surface of the second fixing member 212 is provided with second threads 2121 matching the first threads 2111.

For example, as shown in fig. 1, the first and

second threads

2111 and 2121 are provided such that the inner surfaces of the first and

second fixing members

211 and 212 can be coupled to the bolt 300 having the corresponding threads, and the components are fixed by coupling the bolt 300, the first and

second fixing members

211 and 212, and the first fastening assembly 100.

The bottom surface of the first fixing member 211 is coupled to the top surface of the second fixing member 212, so that the first threads 2111 and the second threads 2121 are cooperatively coupled, and the bolt 300 can be respectively threadedly coupled to the first threads 2111 and the second threads 2121, thereby increasing the threaded coupling area of the bolt 300 and improving the stability of coupling with the bolt 300. The bottom surface of the second fixing member 212 is connected to the top surfaces of the plurality of limit blocks 220, so that the outer surfaces of the plurality of limit blocks 220 are in interference connection with the inner surface of the first fastening assembly 100, and the limit blocks 220 generate an extrusion force on the bolt 300, thereby locking the bolt 300.

Further, the bottom surface of the first fixing piece 211 is in concave-convex connection with the top surface of the first fastening assembly 100, that is, the concave-convex connection position of the first fixing piece 211 and the first fastening assembly 100 is arranged at the top, so that the first fastening assembly 100 is only affected by the combination friction force when being completely connected at last in the process of being connected with the first fixing piece 211, and the difficulty of the first fastening assembly 100 in the whole process of being connected with the first fixing piece 211 is reduced; when the connection is released, a large external force needs to be provided to overcome the combination friction force, so that the connection between the first fastening assembly 100 and the first fixing member 211 is released, and the difficulty of the connection release is improved by the concave-convex connection mode, so that the connection stability of the first fixing member 211 and the first fastening assembly 100 is improved.

Further, the outer surface of the second fixing element 212 and the inner surface of the first fastening assembly 100 may be cooperatively connected in a manner that: the matching connection mode is not limited, and the matching connection mode can be set according to actual requirements.

In some embodiments of the present invention, the inner surface of the stop block 220 is formed with third threads 221 that mate with the second threads 2121.

For example, as shown in fig. 3, the first screw 2111, the second screw 2121 and the third screw 221 are sequentially and cooperatively connected, so that the connection sequence between the plurality of stop blocks 220, the first fixing member 211, the second fixing member 212 and the first fastening assembly 100 and the bolt 300 is as follows: the third threads 221 of the plurality of limit blocks 220, the first threads 2111 of the first fixing piece 211 and the second threads 2121 of the second fixing piece 212 are connected with the bolt 300 in a threaded manner, then the first fastening assembly 100 is connected with the first fixing piece 211, the second fixing piece 212 and the plurality of limit blocks 220 until the bottom surface of the first fixing piece 211 is in concave-convex connection with the top surface of the first fastening assembly 100, the outer surface of the second fixing piece 212 is in fit connection with the inner surface of the first fastening assembly 100, and the outer surfaces of the plurality of limit blocks 220 are in interference connection with the inner surface of the first fastening assembly 100, so that the first fastening assembly 100, the first fixing piece 211, the second fixing piece 212, the plurality of limit blocks 220 and the bolt 300 are in tight connection.

If the connection among the first fastening assembly 100, the first fixing member 211, the second fixing member 212, the plurality of limit blocks 220 and the bolt 300 needs to be released, the connection among the first fastening assembly 100, the first fixing member 211, the second fixing member 212 and the plurality of limit blocks 220 needs to be released first; that is, the external force needs to overcome the concave-convex coupling force of the concave-convex connection between the bottom surface of the first fixing member 211 and the top surface of the first fastening assembly 100, the frictional force of the fit connection between the outer surface of the second fixing member 212 and the inner surface of the first fastening assembly 100, the extrusion force and the frictional force of the interference connection between the outer surfaces of the plurality of limiting blocks 220 and the inner surface of the first fastening assembly 100, and the extrusion force between the top surface of the first fixing member 211 and the connection object, so as to release the connection between the components, and the required external force is relatively large, thereby improving the stability of the connection between the components.

In some embodiments of the present invention, the top surface of the first fastening member 100 is recessed inward to form a central hole 110 for connecting with the second fixing member 212 and the plurality of stoppers 220; the top surface of the first fastening assembly 100 is provided with a plurality of bumps 120; the bottom of the first fixing member 211 is provided with a plurality of concave blocks 2112 matched with the plurality of convex blocks 120.

For example, as shown in fig. 6 and 7, the central hole 110 is used to connect with the second fixing member 212 and the plurality of stoppers 220; the convex block 120 is in concave-convex connection with the concave block 2112, the concave-convex connection mode is simple, the contact area of the concave-convex connection is large, the friction force between the convex block 120 and the concave block 2112 is increased, and the connection between the first fastening assembly 100 and the first fixing piece 211 is more stable.

In some embodiments of the present invention, the bump 120 includes: a first convex surface 121 in the same rotational direction as the first thread 2111, and a second convex surface 122 in the opposite rotational direction to the first thread 2111; the top end of the first convex surface 121 is connected to the top end of the second convex surface 122, and the relative height between the top end and the bottom end of the first convex surface 121 is equal to the relative height between the top end and the bottom end of the second convex surface 122.

For example, as shown in fig. 4, 5 and 10, the length of the first convex surface 121 is greater than the length of the second convex surface 122, assuming that the length of the first convex surface 121 is s₁The length of the second convex surface 122 is s₂(ii) a During the two movement processes of connecting and disconnecting the convex block 120 and the concave block 2112In the above-described embodiment, the force of gravity, the axial force, and the frictional force are only applied to the protrusion 120 and the recess 2112, and the gravity and the axial force are equal to each other during the two movements.

The top end of the first convex surface 121 is connected to the top end of the second convex surface 122, and it is assumed that the top end of the first convex surface 121, the top end of the second convex surface 122, the bottom end of the first convex surface 121 and the bottom end of the second convex surface 122 form a triangle together, and the bottom end of the first convex surface 121 is connected to the bottom end of the second convex surface 122 to form a bottom surface; the included angle between the first convex surface 121 and the bottom surface is a, the included angle between the second convex surface 122 and the bottom surface is b, and the friction coefficients of the first convex surface 121 and the second convex surface 122 are both μ. Since the length of the first convex surface 121 is greater than that of the second convex surface 122, the relative height between the top end and the bottom end of the first convex surface 121 is equal to that between the top end and the bottom end of the second convex surface 122, and then a > b.

Within a triangle, the following trigonometric relationships are known between the included angles:

wherein x is an included angle within the triangle. In order to enable the convex block 120 and the concave block 2112 to move at a uniform speed, the resultant force of the gravity and the axial force applied to the concave block 2112 in the process of connecting the convex block 120 and the concave block 2112 is G, and the friction force between the first convex surface 121 and the concave block 2112 is f₁μ G cos a, and the external force applied to the concave portion 2112 is F₁The formula of force balance shows that: g sin a + f₁＝F₁Namely:

F₁＝G sin a+μG cos a＝G(sin a+μcos a)，

assume tan psi₁Mu is ═ mu, i.e

Similarly, during the process of releasing the connection between the protrusion 120 and the concave 2112, the external force applied to the concave 2112 is F₂The friction force between the second convex surface 122 and the concave block 2112 is f₂μ G cos b, i.e.:

F₂＝G sin b+μG cos b＝G(sin b+μcos b)，

since the coefficients of friction during both movements are the same, i.e.

Due to a>b, then (a + psi)₁)>(b+ψ₁) I.e. sin (a + ψ)₁)>sin(b+ψ₁) Then F₁>F₂。

Therefore, during the process of releasing the connection between the first fastening assembly 100 and the first fixing member 211, a greater external force is required to overcome the frictional force to separate the first fastening assembly 100 from the first fixing member 211. The positions and the lengths of the first convex surface 121 and the second convex surface 122 make the connection between the first fastening assembly 100 and the first fixing piece 211 more stable, and the first fastening assembly is not easily influenced by external force to move, thereby greatly enhancing the anti-loosening effect.

In some embodiments of the invention, the central aperture 110 comprises: a first connection face 111, a first tapered face 112, and a second connection face 113; the first tapered surface 112 is connected to the first connection surface 111 and the second connection surface 113, respectively.

For example, as shown in fig. 4, the first connecting surface 111 is coupled to an outer surface of the second fixing element 212, so that the first fastening assembly 100 is coupled to the second fixing element 212 more stably and prevented from shaking. The first tapered surface 112 is in interference connection with the upper parts of the outer surfaces of the plurality of limit blocks 220, and the second connection surface 113 is in fit connection with the lower parts of the outer surfaces of the plurality of limit blocks 220, that is, in a natural state, the first tapered surface 112 is a surface formed by mutually extending and connecting the outer surfaces of the plurality of limit blocks 220; when first conical surface 112 is connected with a plurality of stopper 220, a plurality of stopper 220 can receive first conical surface 112 extrusion force, make a plurality of stopper 220 take place elastic deformation, inwards shrink, and the surface of a plurality of stopper 220 is connected 113 direction and first conical surface 112 along the second, the stability and the frictional force that 113 and a plurality of stopper 220 are connected to first conical surface 112 and second have been improved, thereby make a plurality of stopper 220 form pressure to bolt 300, realize the locking of a plurality of stopper 220 to bolt 300, make threaded connection between a plurality of stopper 220 and the bolt 300 more firm, be difficult for taking place to become flexible under the exogenic action, stronger locking effect has.

Further, the first connecting surface 111 and the outer surface of the second fixing element 212 are cooperatively connected in a manner that: the matching connection mode is not limited, and the matching connection mode can be set according to actual requirements.

In some embodiments of the present invention, a plurality of stoppers 220 are disposed on the bottom surface of the second fixing member 212 at regular intervals, so that a spacing groove 222 is formed between adjacent stoppers 220.

For example, as shown in fig. 6, when the plurality of limiting blocks 220 are pressed by the first tapered surface 112, the plurality of limiting blocks 220 elastically deform and contract inward, so that the distance between adjacent limiting blocks 220 is shortened; and form the interval slot 222 between the adjacent stopper 220, can make a plurality of stopper 220 can effectual inside shrink, avoided because of the distance between the adjacent stopper 220 is too little, and cause the overlap between the adjacent stopper 220, or adjacent stopper 220 contacts each other for produce great repulsion each other, thereby make stopper 220 damage, even fracture.

In some embodiments of the present invention, the upper portions of the outer surfaces of the stoppers 220 extend to form the second tapered surface 223, and the lower portions of the outer surfaces of the stoppers 220 extend to form the third connecting surface 224.

For example, as shown in fig. 6, the first tapered surface 112 is in interference connection with the second tapered surface 223, and the arrangement of the second tapered surface 223 increases the connection area between the first fastening component 100 and the limiting block 220, and increases the friction force between the first fastening component 100 and the limiting block 220, so that the connection between the first fastening component 100 and the limiting block 220 is more stable; the second connecting surface 113 is connected with the third connecting surface 224 in a matching manner, so that the first tapered surface 112 and the second tapered surface 223 are connected along a fixed direction, and the stability of the connection is improved.

In some embodiments of the present invention, the threaded connection surface 114 is further included, and the threaded connection surface 114 is provided with a fourth thread 1141 matching with the third thread 221.

For example, as shown in fig. 4, after the threaded connection surface 114 is connected to the second connection surface 113, that is, after the first fastening assembly 100 is connected to the first fixing member 211, the second fixing member 212 and the plurality of limit blocks 220, the threaded connection surface 114 is disposed below the plurality of limit blocks 220, so that the first thread 2111, the second thread 2121, the third thread 221 and the fourth thread 1141 are sequentially and mutually connected in a matching manner, and thus the bolt 300 can be sequentially connected to the first thread 2111, the second thread 2121, the third thread 221 and the fourth thread 1141 from top to bottom. After the fourth thread 1141 is connected to the bolt 300, the first tapered surface 112 generates upward pressure on the plurality of limit blocks 220, and the protrusion 120 also generates upward pressure on the concave block 2112, so that the stability of connection between the bolt 300 and the first fastening assembly 100, the first fixing member 211, the second fixing member 212, and the plurality of limit blocks 220 is improved, the anti-loosening effect is good, and the components can be firmly connected.

In some embodiments of the present invention, the top surface of the first fixing member 211 is provided with fixing blocks 2113 for increasing friction.

For example, as shown in fig. 3, the top surface of the first fixing member 211 is provided with fixing blocks 2113, which increase the frictional force between the first fixing member 211 and the connection object. Specifically, the fixing blocks 2113 receive the upward pressure of the first fixing member 211 to form a plurality of recessed positions on the surface of the object to be connected, and the fixing blocks 2113 are connected to the recessed positions in a matching manner, so that the friction force and stability between the first fixing member 211 and the object are improved, the first fixing member 211 is not prone to position movement under the action of external force, the first fixing member 211 is fixed to the bolt 300, and the first fixing member 211 and the bolt 300 are stably fixed to the object.

Other constructions and operations of the anti-loosening device according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

The anti-loosening device according to an embodiment of the present invention will be described in detail in one specific embodiment with reference to fig. 1 to 9, and it should be understood that the following description is only exemplary and not a specific limitation of the invention.

As shown in fig. 1 to 9, the anti-loosening device includes: a first fastening assembly 100, a first fixing member 211, a second fixing member 212, and a plurality of limit blocks 220.

The surfaces of the limiting blocks 220 are provided with third threads 221, the inner surface of the first fixing piece 211 is provided with first threads 2111, and the inner surface of the second fixing piece 212 is provided with second threads 2121 matched with the first threads 2111; the bottom surface of the first fixing member 211 is connected with the top surface of the second fixing member 212; a plurality of limit blocks 220 are uniformly arranged on the bottom surface of the second fixing member 212 at intervals, so that a spacing groove 222 is formed between adjacent limit blocks 220.

The top surface of the first fastening assembly 100 is provided with a central hole 110 which is recessed inwards and used for connecting with the second fixing piece 212 and a plurality of limiting blocks 220; the top surface of the first fastening assembly 100 is provided with a plurality of bumps 120; the bottom of the first fixing piece 211 is provided with a plurality of concave blocks 2112 matched with the plurality of convex blocks 120; the protrusion 120 is connected with the concave 2112. The bump 120 includes: a first convex surface 121 in the same rotational direction as the first thread 2111, and a second convex surface 122 in the opposite rotational direction to the first thread 2111; the length of the first convex surface 121 is greater than that of the second convex surface 122, the top end of the first convex surface 121 is connected with the top end of the second convex surface 122, and the relative height between the top end and the bottom end of the first convex surface 121 is equal to the relative height between the top end and the bottom end of the second convex surface 122.

The center hole 110 includes: a first coupling face 111, a first tapered face 112, a second coupling face 113 and a threaded coupling face 114; a fourth thread 1141 matched with the third thread 221 is arranged on the threaded connection surface 114; the first tapered surface 112 is connected to the first connection surface 111 and the second connection surface 113, respectively, and the threaded connection surface 114 is connected to the second connection surface 113, so that the first thread 2111, the second thread 2121, the third thread 221 and the fourth thread 1141 are sequentially and mutually matched and connected; the first connecting surface 111 is connected with the outer surface of the second fixing member 212 in a matching manner; the upper parts of the outer surfaces of the limiting blocks 220 mutually extend to form second taper surfaces 223, and the lower parts of the outer surfaces of the limiting blocks 220 mutually extend to form third connecting surfaces 224; the first tapered surface 112 is in interference fit with the second tapered surface 223, and the second connection surface 113 is in fit connection with the third connection surface 224.

The top surface of the first fixing member 211 is provided with a plurality of fixing blocks 2113 for increasing the frictional force with an object, and the outer surface of the first fixing member 211 is arranged in a regular hexagon.

According to the anti-loosening device provided by the embodiment of the invention, at least some effects can be achieved by the arrangement that the first thread 2111, the second thread 2121, the third thread 221 and the fourth thread 1141 are sequentially matched and connected, so that the bolt 300 can be sequentially and respectively connected with the first thread 2111, the second thread 2121, the third thread 221 and the fourth thread 1141, and the fixation of the bolt 300 with the first fastening assembly 100, the first fixing piece 211, the second fixing piece 212 and the plurality of limit blocks 220 is realized. The convex block 120 is in concave-convex connection with the concave block 2112, so that the difficulty of connection release between the first fixing piece 211 and the first fastening assembly 100 is increased, and the connection stability is improved; first conical surface 112 and second conical surface 223 interference are connected, the second is connected face 113 and the cooperation of third connection face 224 and is connected, make stopper 220 take place elastic deformation, inwards shrink, even make the distance between the lower part of adjacent stopper 220 shorten, thereby make stopper 220 produce the extrusion force to bolt 300, realize the locking to bolt 300, thereby make the threaded connection between third screw thread 221 and the bolt 300 more stable, be difficult for receiving the effort of external force and remove the connection, realize locking effect, thereby realize making firm connection between the part.

For example, as shown in fig. 6, the outer surface of the first fixing member 212 is configured as a regular hexagon, and the maximum material is used, so that the first fixing member 212 is stronger; meanwhile, the first fixing member 212 is conveniently installed by using a wrench, and the connection between the first fixing member 212, the bolt 300 and a connection object can be better adjusted by rotating the wrench by a small angle at a time. Further, as shown in fig. 7, the outer surface of the lower portion of the first fastening assembly 100 may also be configured as a regular hexagon, so that it is convenient to adjust the connection between the first fastening assembly 100 and the first fixing member 212, the second fixing member 213 and the plurality of limit blocks 220 by using a wrench.

Further, in order to illustrate that the anti-loosening effect of the embodiment is good, the following table of experimental data is respectively made:

table 1: results of various kinds of nut tests

The test data in table 1, which is actually measured data under the same test conditions, is different from theoretical calculations due to the friction coefficient of the contact surface between the first fastening member 100, the second fastening member 200 and the bolt 300 and the machining accuracy.

According to table 1, the tightening torque is the external force required to be applied to tighten the first fastening assembly 100 or the second fastening assembly 200 with the object; the unscrewing torque is the external force that needs to be applied to unscrew the first fastening assembly 100 or the second fastening assembly 200 from the object. As can be seen from the data in table 1 above, in the present embodiment, in order to tighten the first fastening member 100 with the second fastening member 200, the bolt 300, and the object, the tightening torque required to be applied to the first fastening member 100 is 55 N.M; in order to tighten the second fastening assembly 200 with the bolt 300 and the object, the tightening torque required to be applied to the second fastening assembly 200 is 50 N.M; to loosen the second fastening assembly 200 from the bolt 300 and the object, the loosening torque required to be applied to the second fastening assembly 200 is 63 N.M; to loosen the first and

second fastening assemblies

100 and 200, the bolt 300, and the object, the loosening torque required to be applied to the first fastening assembly 100 is 59 N.M; and the loosening torque of the first fastening member 100 and the second fastening member 200 is 114.5% and 118% of the tightening torque, respectively, i.e., the loosening torque of the first fastening member 100 is greater than the tightening torque and the loosening torque of the second fastening member 200 is greater than the tightening torque. Meanwhile, the loosening torque of the first fastening assembly 100 and the second fastening assembly 200 of the present embodiment is the largest external force that needs to be applied as a whole with respect to other types, so that the fixing effect on the object is the best, and the realized anti-loosening effect is the best.

Referring to fig. 9, the down-type threaded nut has two types of threads in the same thread segment, and can be matched with the left-handed thread of the bolt 300 or the right-handed thread of the bolt 300; when being connected with bolt 300, generally use two kinds of nuts of different direction of rotation to realize, locking effect is similar with the locking effect of the double nut structure in the table above. As can be seen in FIG. 9, the Down-threaded fastener still maintained 82% pretension after 120s of vibration; the pretightening force of the structure of the common thread spring washer is reduced to about 80% after 1-2s of vibration, and the pretightening force is basically lost after 15s of vibration.

Therefore, with reference to fig. 9, the anti-loosening effect of the down-type threaded connection is better than that of the common threaded connection; and combine table 1, the locking effect of this embodiment is effectual than the locking of two nuts, and then the locking effect of this embodiment is effectual than ordinary threaded connection's locking. That is, the present embodiment can achieve firm connection between the bolt 300 and the first fastening assembly 100 and the second fastening assembly 200, achieve good anti-loosening effect, and improve the stability of connection between components.

In the description herein, references to the description of "one embodiment," "some embodiments," or "the embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A check device, comprising:

a first fastening component;

a second fastening assembly comprising: the fixing unit and a plurality of limiting blocks; the limiting blocks are connected with the bottoms of the fixing units, the fixing units are in concave-convex connection with the first fastening assemblies, and the outer surfaces of the limiting blocks are in interference connection with the inner surfaces of the first fastening assemblies.

2. A check assembly as defined in claim 1, further comprising: the fixing unit includes: a first fixing member and a second fixing member; the inner surface of the first fixing piece is provided with a first thread, and the inner surface of the second fixing piece is provided with a second thread matched with the first thread; the bottom surface of the first fixing piece is connected with the top surface of the second fixing piece, and the bottom surface of the second fixing piece is connected with the top surfaces of the limiting blocks; the bottom surface of the first fixing piece is in concave-convex connection with the top surface of the first fastening assembly, and the outer surface of the second fixing piece is in fit connection with the inner surface of the first fastening assembly.

3. A check assembly as defined in claim 2, further comprising: and a third thread matched with the second thread is formed on the inner surface of the limiting block, and the first thread, the second thread and the third thread are sequentially connected in a matched manner.

4. A check assembly as defined in claim 3, wherein: the top surface of the first fastening component is inwards sunken to form a central hole which is used for being connected with the second fixing piece and the limiting blocks; the top surface of the first fastening component is provided with a plurality of convex blocks; the bottom of the first fixing piece is provided with a plurality of concave blocks matched with the plurality of convex blocks; the convex block is in concave-convex connection with the concave block.

5. A check assembly as defined in claim 4, further comprising: the bump includes: a first convex surface in the same direction of rotation as the first thread and a second convex surface opposite the direction of rotation of the first thread; the length of first convex surface is greater than the length of second convex surface, the top of first convex surface with the top of second convex surface is connected, relative height between the top of first convex surface and the bottom equals relative height between the top of second convex surface and the bottom.

6. A check assembly as defined in claim 4, further comprising: the central bore includes: a first connection face, a first tapered face and a second connection face; the first conical surface is respectively connected with the first connecting surface and the second connecting surface, the first connecting surface is connected with the outer surface of the second fixing piece in a matched mode, the first conical surface is connected with the upper portion of the outer surface of the limiting block in an interference mode, and the second connecting surface is connected with the lower portion of the outer surface of the limiting block in a matched mode.

7. An anti-loosening device as defined in claim 6, further comprising: and the limiting blocks are uniformly arranged on the bottom surface of the second fixing piece at intervals, so that a spacing groove is formed between every two adjacent limiting blocks.

8. An anti-loosening device as defined in claim 7, further comprising: the upper parts of the outer surfaces of the limiting blocks extend mutually to form second conical surfaces, and the lower parts of the outer surfaces of the limiting blocks extend mutually to form third connecting surfaces; the first conical surface is in interference connection with the second conical surface, and the second connecting surface is in fit connection with the third connecting surface.

9. An anti-loosening device as defined in claim 6, further comprising: the screw thread connecting surface is provided with a fourth screw thread matched with the third screw thread; the threaded connection surface is connected with the second connection surface, and the first thread, the second thread, the third thread and the fourth thread are sequentially connected in a matched manner.

10. A check assembly as defined in claim 2, further comprising: the top surface of the first fixing piece is provided with a plurality of fixing blocks used for increasing friction force.