CN209818496U

CN209818496U - Anti-loosening and clamping combined nut

Info

Publication number: CN209818496U
Application number: CN201920206035.9U
Authority: CN
Inventors: 张苗淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-18
Filing date: 2019-02-18
Publication date: 2019-12-20
Anticipated expiration: 2029-02-18

Abstract

The utility model relates to a locking solid combination nut of embracing that moves. The taper-shaped locking nut comprises an upper locking nut (1) with a frustum space at the inner lower part and a frustum-shaped lower locking nut (2), wherein the frustum space and the taper of the lower locking nut (2) are the same, and an opening seam (5) parallel to the axis of the lower locking nut (2) is arranged on the lower locking nut (2). The lower locking nut is extruded by the upper locking nut, so that the lower locking nut deforms and tightly holds the stud, and the anti-loosening function is realized.

Description

Anti-loosening and clamping combined nut

Technical Field

The utility model relates to a nut.

Background

Every engineering product, no matter how complex it is constructed, mostly requires the use of threaded fasteners. An important advantage of threaded fasteners over most other coupling means is their ability to be removed and reused. However, this is also a source of problems because threaded fasteners are susceptible to self-loosening. Since the industrial revolution, the problem of thread loosening has been a problem that people expect to solve. Although a great deal of experimental research is carried out by technicians in many countries aiming at the loosening of threads in the last 150 years, the technicians respectively adopt methods such as a tooth thread gasket, nylon embedding, deformed threads, double nut splicing and killing and the like, the self-loosening time of a fastener can be delayed to a certain degree, but the problems are not fundamentally solved. The existing anti-loosening bolt is high in cost, the common bolt is different in shape and size, the anti-loosening bolt with the proper size and shape is not available frequently, a die opening casting is needed when the anti-loosening bolt needs to be replaced, and the cost is high.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: how to provide a nut that is suitable for ordinary bolt and uses, make ordinary bolt also have the function of locking bolt.

The utility model adopts the technical proposal that: locking is embraced and is firmly combined nut, including inside lower part area frustum space upper portion lock nut (1) and frustum form lower part lock nut (2), the tapering of frustum space and lower part lock nut (2) is the same, has an opening seam (5) that is on a parallel with lower part lock nut (2) axis on lower part lock nut (2).

As a preferred mode: a layer of self-lubricating material is adhered inside the frustum space and/or outside the lower locking nut (2).

As a preferred mode: the self-lubricating material is a sprayed graphite layer.

As a preferred mode: the bottom of the outer side of the lower part lock nut (2) is provided with a cutting table (6).

As a preferred mode: the outer side of the lower part lock nut (2) is provided with an external thread.

The utility model has the advantages that: the lower locking nut is deformed to tightly hold the stud by extruding the lower locking nut through the upper locking nut, so that the anti-loosening function is realized.

The main stress point of the common screw fastener only acts on the first thread and the second thread of the nut, the other threads are not basically stressed, when the tightening force is large, the stress is concentrated at the first thread, the first thread is easy to bend and shear, and then the second thread is stressed and generates the locking force. By analogy, the bearing load surface transfers stress one by one, and the threads are correspondingly sheared and abraded in sequence, so that the strength of the nut and the threads is greatly reduced. When the nut is vibrated, the teeth of the nut and the teeth of the screw rod can slide, so that the friction coefficient of the screw thread is changed from a static value to a dynamic value, and the nut is loosened by reducing or eliminating the friction force to slide downwards just like a heavy object on a slope.

The utility model discloses the locking technique of moving of traditional pressure friction changes into the locking technique of moving of lock ring interlock friction. The principle of the specific implementation scheme is as follows: the anti-loosening holding combined nut is divided into an upper part and a lower part. The upper part is an inner conical thread sleeve (an upper locking nut with a frustum space at the inner lower part), and the lower part is an outer conical thread sleeve (a frustum-shaped lower locking nut). The component structure of the inner conical thread sleeve is as follows: the upper half part is a screw hole, and the lower half part is a tapered hole. The screw hole is used for screwing and fastening with the screw. And the conical hole is used for exerting the embedding and pressing hoop effect on the outer conical thread sleeve. The external conical thread insert component is constructed as follows: the whole shape is conical, and the periphery is provided with a through split opening (opening seam) for tightly hooping and contracting the external conical thread sleeve. The middle part is provided with a screw hole with the same aperture as the inner conical thread sleeve part. In the integral construction, the outer conical thread insert corresponds to a wedge embedded between the inner conical thread insert and the screw. The larger the screwing pressure of the inner conical thread insert is, the stronger the tightening contraction force of the outer conical thread insert is, and the larger the tightening force generated by the screw rod is. Each tooth on the screw can obtain load on average, so that the anti-loosening friction force generated at each part of the screw thread is similar, and the damage capability of the screw thread to the shearing deformation is effectively improved. The utility model discloses with the vertical load pressure friction mode of traditional thread tooth, change into the friction mode of the mutual lock ring interlock of thread tooth. The breakthrough innovation of the technology not only multiplies the friction surface between the thread teeth, but also generates strong encircling tightening hoop friction stopping force between the thread teeth, thereby effectively solving the problem of the traditional nut, and promoting the loosening of the nut caused by the weakening of the friction force between the nut and the fixing piece due to the weakening of the vertical pre-tightening pressure.

Drawings

FIG. 1 is a schematic view of the usage of the present invention;

FIG. 2 is a schematic view of a lower lock nut construction;

FIG. 3 is a schematic A-A diagram of FIG. 2;

FIG. 4 is a schematic view of B-B of FIG. 2

The device comprises an upper locking nut 1, a lower locking nut 2, a lower locking nut 3, an object to be fastened, a stud 4, a 5, an opening seam 6 and a cutting table.

Detailed Description

Example 1

As shown in fig. 1-4, the stud 4 has a diameter of 2cm, the stud 4 passes through the object to be fastened (two plates) 3, locking through upper portion lock nut 1 and lower part lock nut 2, the utility model discloses in with prior art mainly the difference lie in having adopted the locking of forming by upper portion lock nut 1 and the combination of lower part lock nut 2 and embrace solid combination nut, lower part lock nut 2 is a frustum column structure, the thickness at lower part lock nut 2 top is at 1-3mm, there is an opening gap 5 that is on a parallel with lower part lock nut 2 axis on the lower part lock nut 2, the frustum space is taken to the inside lower part of upper portion lock nut 1, the thickness in frustum space is 5-15mm, the tapering of frustum space and lower part lock nut 2 is the same, there is locking moving cutting table 6 outside bottom of lower part lock nut 2, the inside graphite layer that has the one deck spraying of bonding of frustum space and lower part lock nut 2's outside. In the using process, an object to be fastened 3 is firstly compressed through the lower locking nut 2, then the upper locking nut 1 is screwed, in the screwing process, the frustum space of the upper locking nut 1 extrudes the lower locking nut 2, so that the lower locking nut 2 deforms and tightly holds the stud 4, when the lower locking nut 2 needs to be loosened, the upper locking nut 1 is firstly loosened through a wrench, then the lower locking nut 2 is loosened through the cutting table 6 by using a wrench, and the conicity of the frustum space and the taper of the lower locking nut 2 are 1: 50.

Example 2

The difference from the embodiment 1 is that the diameter of the stud 4 is 20cm, the thickness of the topmost part of the lower lock nut 2 is 5-10mm, the thickness of the frustum space is 20-30mm, the outer side of the lower lock nut 2 is provided with external threads, and the outer side of the frustum space is provided with internal threads. In the state of a thick stud, the lower part of the lower lock nut 2 can be guaranteed to be clamped.

Claims

1. Locking combination nut of embracing, its characterized in that: the taper-shaped locking nut comprises an upper locking nut (1) with a frustum space at the inner lower part and a frustum-shaped lower locking nut (2), wherein the frustum space and the taper of the lower locking nut (2) are the same, and an opening seam (5) parallel to the axis of the lower locking nut (2) is arranged on the lower locking nut (2).

2. The anti-loosening and clamping combined nut as claimed in claim 1, wherein: a layer of self-lubricating material is adhered inside the frustum space and/or outside the lower locking nut (2).

3. The anti-loosening and clamping combined nut as claimed in claim 2, wherein: the self-lubricating material is a sprayed graphite layer.

4. The anti-loosening and clamping combined nut as claimed in claim 1, wherein: the bottom of the outer side of the lower part lock nut (2) is provided with a cutting table (6).

5. The anti-loosening and clamping combined nut as claimed in claim 1, wherein: the outer side of the lower locking nut (2) is provided with an external thread, and the outer side of the frustum space is provided with an internal thread.