CN220668038U

CN220668038U - Locking assembly and connecting mechanism

Info

Publication number: CN220668038U
Application number: CN202322356014.4U
Authority: CN
Inventors: 闫博; 张珂; 张超; 刘鲁
Original assignee: Xuzhou XCMG Mining Machinery Co Ltd
Current assignee: Xuzhou XCMG Mining Machinery Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-03-26
Anticipated expiration: 2033-08-31

Abstract

The utility model discloses a locking assembly and a connecting mechanism, which comprises a fastening bolt, a fastening nut, a lock washer and a lock nut, wherein an external thread I is arranged on the radial peripheral surface of a screw rod of the fastening bolt; the fastening nut is provided with an internal thread hole I matched with the external thread I, and the external thread I and the internal thread hole I are meshed with each other to form a fastening thread pair; the anti-loose washer is provided with an external thread II and a connecting hole which is used for being sleeved on the screw rod; the locknut is provided with an internal threaded hole II matched with an external thread II of the lockwasher and a mounting hole which is coaxial with the internal threaded hole II and is convenient for penetrating out of a fastening bolt and a screw rod, and the external thread II and the internal threaded hole II are meshed with each other to form a lockscrew pair; the fastening bolt is sequentially connected with the lock washer, the fastening nut and the lock nut. The fastening thread pair and the anti-loosening thread pair are opposite in screwing direction, mutual limiting is achieved through two pairs of threads opposite in screwing direction, and loosening of the nut can be effectively prevented.

Description

Locking assembly and connecting mechanism

Technical Field

The utility model relates to the technical field of fastening, in particular to a double-nut locking assembly.

Background

The threaded connection is a fastening mode widely used in the connection of the current mechanical parts, has the advantages of simple structure, reliable connection, convenient disassembly and assembly and the like, and is widely applied to the fields of engineering machinery and connection structures. However, the nut is easily loosened due to the influence of factors such as vibration, temperature difference, alternating load and the like, so that accidents occur. The existing anti-loosening mode uses double nuts to replace single nuts for connection, and can not effectively prevent loosening under alternating load and vibration working conditions, and the phenomenon of loosening of the nuts still occurs.

The traditional down bolt, a composite thread (bulletin number: CN 1281954A) of Chinese patent adopts a composite structure of positive and negative threads, and the pretightening force can be effectively reserved by means of mutual restriction of left-handed threads and right-handed threads, but the manufacturing process is difficult and the cost is high, in addition, the strength of the threads is reduced, and the screw cannot be widely used.

Disclosure of Invention

The present utility model is directed to a locking assembly that solves the above-mentioned problems. The fastening screw pair is formed by mutually engaging the screw threads of the fastening bolt and the fastening nut, the locking washer and the screw threads of the locking nut are mutually engaged to form the locking screw pair, the fastening screw pair and the locking screw pair are opposite in screwing direction, and mutual limiting is realized by two pairs of screw threads opposite in screwing direction, so that the nut is prevented from loosening.

The utility model is realized according to the following technical scheme:

in a first aspect, the present utility model discloses a locking assembly comprising:

the radial peripheral surface of the screw rod of the fastening bolt is provided with an external thread I;

the fastening nut is provided with an internal threaded hole I matched with the external thread I, and the external thread I and the internal threaded hole I are meshed with each other to form a fastening thread pair;

the anti-loose washer is provided with an external thread II and a connecting hole sleeved on the screw;

the locknut is provided with an internal threaded hole II matched with the external thread II and a mounting hole which is coaxial with the internal threaded hole II and is convenient for penetrating out of a fastening bolt and a screw rod, and the external thread II and the internal threaded hole II are meshed with each other to form a locknut pair;

the fastening bolt is sequentially connected with the lock washer, the fastening nut and the lock nut.

In some embodiments, the tightening thread pair is counter-handed to the anti-loosening thread pair.

In some embodiments, the central axes of the connecting hole, the external thread I, the external thread II, the internal thread hole I, the internal thread hole II and the mounting hole are coincident.

In some embodiments, the diameters of the attachment and mounting holes are 1mm-2mm greater than the diameter of the external thread I.

In some embodiments, the internal upper step surface is pressed against the upper surface of the fastening nut after the locknut is tightened, with a predetermined gap from the adjacent connection plates.

In a second aspect, the present utility model discloses a connection mechanism comprising:

the locking assembly;

the first connecting plate and the second connecting plate are fixed together through the locking component.

In some embodiments, the first connecting plate and the second connecting plate are respectively provided with a connecting hole, and the fastening bolts are sequentially connected with the first connecting plate, the second connecting plate, the locking washer, the fastening nut and the locking nut.

In some embodiments, the diameter of the outer wall of the connecting hole of the first connecting plate and the second connecting plate is 1mm-2mm larger than the diameter of the thread of the fastening bolt.

The utility model has the beneficial effects that:

the fastening screw pair is formed by mutually engaging the screw threads of the fastening bolt and the fastening nut, the locking washer and the screw threads of the locking nut are mutually engaged to form the locking screw pair, the fastening screw pair and the locking screw pair are opposite in screwing direction, mutual limiting is realized by two pairs of screw threads opposite in screwing direction, and the loosening of the nut can be effectively prevented. Meanwhile, compared with the Down's thread, the down's thread has wide applicability, and the manufacturing difficulty and the manufacturing cost are reduced under the condition that the strength of the thread pair is not reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is a schematic view of an application split of a double nut locking device of the present utility model;

fig. 2 is an installation cross-section of the double nut locking device of the present utility model.

Reference numerals illustrate: the first connecting plate 1, the connecting hole 11, the second connecting plate 2, the connecting hole 21, the fastening bolt 3, the external thread I31, the fastening nut 4, the internal thread hole I41, the lock washer 5, the connecting hole 51, the external thread II 52, the lock nut 6, the internal thread hole II 61 and the mounting hole 62.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 and 2, a locking assembly comprises a fastening bolt 3, a fastening nut 4, a locking washer 5 and a locking nut 6; the radial peripheral surface of the screw rod of the fastening bolt 3 is provided with an external thread I31; the fastening nut 4 is provided with an internal threaded hole I41 matched with the external thread I31, and the external thread I31 and the internal threaded hole I41 are meshed with each other to form a fastening thread pair; the lock washer 5 is provided with an external thread II 52 and a connecting hole 51 for sleeving on the screw; the locknut 6 is provided with an internal threaded hole II 61 matched with the external thread II 52 of the lockwasher 5 and a mounting hole 62 which is coaxial with the internal threaded hole II 61 and is convenient for penetrating out of a fastening bolt and a screw rod, and the external thread II 52 and the internal threaded hole II 61 are meshed with each other to form a lockscrew pair; the fastening bolt 3 is sequentially connected with a lock washer 5, a fastening nut 4 and a lock nut 6.

The further scheme is as follows: the fastening thread pair and the anti-loosening thread pair are opposite in rotation direction, and mutual limiting is achieved through two pairs of threads opposite in rotation direction, so that the nut is prevented from loosening.

With continued reference to fig. 1 and 2, the central axes of the connection hole 51, the external thread i 31, the external thread ii 52, the internal thread hole i 41, the internal thread hole ii 61, and the mounting hole 62 overlap.

With continued reference to fig. 1 and 2, the diameters of the connection hole 51 and the mounting hole 62 are 1mm to 2mm larger than the diameter of the external thread i 31 of the fastening bolt 3.

With continued reference to fig. 1 and 2, after the locknut 6 is screwed down, the inner upper step surface is pressed against the upper surface of the fastening nut 4, and a predetermined gap is provided between the fastening nut and the adjacent connecting plate.

With continued reference to fig. 1 and 2, the present utility model also discloses a connection mechanism, which includes the above locking assembly, the first connection plate 1 and the second connection plate 2, and the first connection plate 1 and the second connection plate 2 are fixed together by the locking assembly.

With continued reference to fig. 1 and 2, the first connecting plates 1 are provided with connecting holes 11, the second connecting plates 2 are provided with connecting holes 21, and the fastening bolts 3 are sequentially connected with the first connecting plates 1, the second connecting plates 2, the lock washers 5, the fastening nuts 4 and the lock nuts 6.

With continued reference to fig. 1 and 2, the diameters of the outer walls of the connecting holes 11 and 21 of the first and second connection plates 1 and 2 are both larger than the thread diameter of the fastening bolt 3 by 1mm-2mm.

In summary, the utility model discloses a locking assembly, which comprises a first connecting plate, a second connecting plate, a fastening bolt, a fastening nut, a locking washer and a locking nut. The fastening screw is meshed with the screw of the fastening nut to form a fastening screw pair, the locking washer is meshed with the screw of the locking nut to form a locking screw pair, the fastening screw pair and the locking screw pair are opposite in screwing direction, mutual limiting is achieved through two pairs of opposite-direction screw threads, and accordingly loosening of the nut is prevented.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.

The foregoing description is only illustrative of the preferred embodiments of the present utility model, and is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A locking assembly, comprising:

2. A locking assembly as set forth in claim 1 wherein:

the fastening thread pair and the anti-loosening thread pair are opposite in rotation direction.

3. A locking assembly as set forth in claim 1 wherein:

the central axes of the connecting hole, the external thread I, the external thread II, the internal thread hole I, the internal thread hole II and the mounting hole coincide.

4. A locking assembly as set forth in claim 1 wherein:

the diameters of the connecting hole and the mounting hole are larger than the diameter of the external thread I by 1mm-2mm.

5. A locking assembly as set forth in claim 1 wherein:

the inner upper step surface is tightly pressed on the upper surface of the fastening nut after the locknut is screwed, and a preset gap is reserved between the locknut and the adjacent connecting plate.

6. A connection mechanism, comprising:

a locking assembly as claimed in any one of claims 1 to 5;

7. A connection mechanism according to claim 6, wherein:

the first connecting plate and the second connecting plate are respectively provided with a connecting hole, and the fastening bolts are sequentially connected with the first connecting plate, the second connecting plate, the anti-loosening washer, the fastening nut and the anti-loosening nut.

8. A connection mechanism according to claim 7, wherein:

the diameters of the outer walls of the connecting holes of the first connecting plate and the second connecting plate are both larger than the diameter of the screw thread of the fastening bolt by 1mm-2mm.