WO2016197803A1

WO2016197803A1 - Self-tightening nut and bolt fastener

Info

Publication number: WO2016197803A1
Application number: PCT/CN2016/082613
Authority: WO
Inventors: 刘凤翼
Original assignee: 刘凤翼
Priority date: 2015-06-11
Filing date: 2016-05-19
Publication date: 2016-12-15

Abstract

Disclosed is a self-tightening nut and bolt fastener, the self-tightening nut fastener comprising a self-tightening nut body (1), a self-tightening washer (2) and a common bolt (3); the contact face of the self-tightening nut body (1) and the self-tightening washer (2) is a spiral face (B) of a smooth transition; and the self-tightening nut body (1) is in threaded connection with the common bolt (3). Disclosed is a self-tightening nut and bolt fastener, the bolt fastener comprising a self-tightening bolt (4), a self-tightening washer (5) and a common nut (6); and the common nut (6) is in threaded connection with the self-tightening bolt (4). The self-tightening nut and bolt fastener uses a self-tightening principle, and a self-tightening structure is arranged on the nut (1) or the bolt (4) so as to achieve a self-tightening effect after being tightened, so that the nut is not displaced or loosened.

Description

Self-tightening nut and bolt fastener

Technical field

The invention relates to the technical field of application of nuts and bolt fasteners, in particular to a self-tightening nut and a bolt fastener.

Background technique

In the modern industrial field, nuts and bolts are used in large quantities to lock structural parts, but at the same time we will find that in many cases, it is better to apply to vibration, we often need to lock The structural parts are regularly repaired and reinforced to prevent structural misalignment due to the looseness of the nut bolts.

In view of the above situation, in practice, people use various methods to tighten the locked nut bolts, such as with super glue, electric welding, perforation secondary reinforcement, etc., but there is still no way to fundamentally solve the nut. The phenomenon of loose shifting.

Summary of the invention

The prior art is difficult to meet the needs of people. In order to solve the above problems, the present invention proposes a self-tightening nut and a bolt fastener.

To achieve the technical purpose, the technical solution adopted by the present invention is:

A self-tightening nut and a bolt fastener, wherein the self-tightening nut fastener comprises a self-tightening nut body, a self-tightening washer and a common bolt; the self-tightening nut body and the self-tightening washer have a smooth transition spiral The self-tightening nut body is screwed with a common bolt.

A self-tightening nut and a bolt fastener, wherein the bolt fastener comprises a self-tightening bolt, a self-tightening washer and a common nut; the inner diameter surface of the self-tightening washer is a smooth surface, and the self-tightening washer and the self-tightening bolt The contact surface is a smooth transition spiral surface, and the helicoid surface of the self-tightening washer The spiral surface of the self-tightening bolt corresponds to the anastomosis; the common nut is screwed with the self-tightening bolt.

Further, the self-tightening washer and the self-tightening nut body are screwed to the common bolt, thereby fastening the fastened object.

Further, the self-tightening bolt and the self-tightening washer are screwed to the common nut to be fastened to the object fastener.

Compared with the prior art, the invention has the following beneficial effects: the self-tightening nut and the bolt fastener adopt a self-tightening principle, and a self-tightening structure is arranged on the nut or the bolt to achieve self-tightening effect after being locked. The nut bolt can no longer be displaced or loosened. This self-tightening nut bolt can be widely used in mechanical design, processing and manufacturing, and has revolutionary application value in the railway, bridge and construction industries; the overall design is novel. Practical and easy to promote.

DRAWINGS

Figure 1 is a schematic view showing the structure of a nut fastener of the present invention.

2 is a schematic view showing the structure of a bolt fastener of the present invention.

Figure 3 is a schematic view showing the structure of the self-tightening gasket of the present invention.

Figure 4 is a schematic view showing the structure of the self-tightening nut of the present invention.

Figure 5 is a schematic view showing the structure of the bolt of the present invention.

Figure 6 is a schematic view showing the structure of the nut and the gasket of the present invention.

In the reference numerals: self-tightening nut body 1; self-tightening washer 2; ordinary bolt 3; self-tightening bolt 4; self-tightening washer 5; ordinary nut 6; fastened object A; spiral surface B.

detailed description

The technical party in the embodiment of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. The present invention is clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to the drawings 1 to 6 of the specification, in the embodiment of the invention, a self-tightening nut and a bolt fastener, the self-tightening nut fastener comprises a self-tightening nut body 1, a self-tightening washer 2 and a common bolt 3 The contact surface of the self-tightening nut body 1 and the self-tightening washer 2 is a smooth transition spiral surface B; the self-tightening nut body 1 is screwed with the common bolt 3.

A self-tightening nut and a bolt fastener, wherein the bolt fastener comprises a self-tightening bolt 4, a self-tightening washer 5 and a common nut 6; the inner diameter surface of the self-tightening washer 5 is a smooth surface, and the self-tightening washer 5 The contact surface with the self-tightening bolt 4 is a smooth transition spiral surface, and the spiral surface of the self-tightening washer 5 is matched with the spiral surface of the self-tightening bolt 4; the common nut 6 is screwed with the self-tightening bolt 4.

Further, the self-tightening washer 2 and the self-tightening nut body 1 are screwed to the ordinary bolt 3, thereby fastening the fastened object.

Further, the self-tightening bolt 4 and the self-tightening washer 5 are screwed to the ordinary nut 6 to be fastened by the fastening object.

In the design of the invention: in the self-tightening nut fastener, the inner diameter surface of the self-tightening nut is a thread surface, and the thread is matched with the thread on the bolt.

The helix angle of the self-tightening washer and the spiral surface B on the self-tightening nut is the same, and is set to "θ ₁ ".

The helix angle corresponding to the thread on the bolt is set to "θ ₂ ".

M is the coefficient of static friction between the self-tightening washer and the object being fastened.

K is the coefficient of static friction between the helix surface of the self-tightening washer and the self-tightening nut.

When the condition [K+tan(θ ₁ )]/[1-Ktan(θ ₁ )]≦M is satisfied and θ ₁ >θ ₂ , the self-tightening effect is established, and the fastened object will be permanently locked. The self-tightening nut cannot be loosened or displaced unless the self-tightening nut or the self-tightening washer body is broken.

In the self-tightening bolt fastener, the inner diameter surface of the nut is a threaded surface, and this thread is matched with the thread on the bolt.

The helix angle of the self-tightening washer and the spiral surface B on the self-tightening bolt is the same, and is set to "θ ₁ ".

The helix angle corresponding to the thread on the bolt is set to "θ ₂ ".

K is the coefficient of static friction between the helix surface of the self-tightening washer and the self-tightening bolt.

When the condition [K+tan(θ ₁ )]/[1-Ktan(θ ₁ )]≦M is satisfied and θ ₁ >θ ₂ , the self-tightening effect is established, and the fastened object will be permanently locked. The self-tightening bolts cannot be loosened or displaced unless the self-tightening bolt or the self-tightening washer body is broken.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments in accordance with the technical spirit of the present invention should be included in the present technology. Within the scope of protection of the program.

Claims

A self-tightening nut and a bolt fastener, wherein the self-tightening nut fastener comprises a self-tightening nut body, a self-tightening washer and a common bolt; wherein: the contact surface of the self-tightening nut body and the self-tightening washer is a smoothly transitioning helicoid; the self-tightening nut body is threadedly coupled to a common bolt.
A self-tightening nut and a bolt fastener, wherein the bolt fastener comprises a self-tightening bolt, a self-tightening washer and a common nut; and the inner diameter surface of the self-tightening washer is a smooth surface, and the self-tightening washer The contact surface with the self-tightening bolt is a smooth transition spiral surface, and the spiral surface of the self-tightening washer corresponds to the spiral surface of the self-tightening bolt; the common nut is screwed with the self-tightening bolt.
A self-tightening nut and bolt fastener according to claim 1, wherein the self-tightening washer and the self-tightening nut body are screwed to the common bolt, thereby fastening the fastened object.
A self-tightening nut and bolt fastener according to claim 2, wherein the self-tightening bolt and the self-tightening washer are screwed to the common nut to be fastened by the fastening object.